230 lines
8.0 KiB
C
230 lines
8.0 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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#ifndef __iwl_op_mode_h__
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#define __iwl_op_mode_h__
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struct iwl_op_mode;
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struct iwl_trans;
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struct sk_buff;
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struct iwl_device_cmd;
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struct iwl_rx_cmd_buffer;
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struct iwl_fw;
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struct iwl_cfg;
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/**
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* DOC: Operational mode - what is it ?
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*
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* The operational mode (a.k.a. op_mode) is the layer that implements
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* mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses
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* the transport API to access the HW. The op_mode doesn't need to know how the
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* underlying HW works, since the transport layer takes care of that.
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*
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* There can be several op_mode: i.e. different fw APIs will require two
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* different op_modes. This is why the op_mode is virtualized.
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*/
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/**
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* DOC: Life cycle of the Operational mode
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*
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* The operational mode has a very simple life cycle.
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*
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* 1) The driver layer (iwl-drv.c) chooses the op_mode based on the
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* capabilities advertized by the fw file (in TLV format).
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* 2) The driver layer starts the op_mode (ops->start)
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* 3) The op_mode registers registers mac80211
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* 4) The op_mode is governed by mac80211
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* 5) The driver layer stops the op_mode
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*/
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/**
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* struct iwl_op_mode_ops - op_mode specific operations
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*
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* The op_mode exports its ops so that external components can start it and
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* interact with it. The driver layer typically calls the start and stop
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* handlers, the transport layer calls the others.
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*
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* All the handlers MUST be implemented
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*
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* @start: start the op_mode. The transport layer is already allocated.
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* May sleep
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* @stop: stop the op_mode. Must free all the memory allocated.
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* May sleep
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* @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the
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* HCMD the this Rx responds to.
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* Must be atomic.
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* @queue_full: notifies that a HW queue is full.
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* Must be atomic
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* @queue_not_full: notifies that a HW queue is not full any more.
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* Must be atomic
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* @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that
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* the radio is killed. Must be atomic.
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* @free_skb: allows the transport layer to free skbs that haven't been
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* reclaimed by the op_mode. This can happen when the driver is freed and
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* there are Tx packets pending in the transport layer.
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* Must be atomic
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* @nic_error: error notification. Must be atomic
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* @cmd_queue_full: Called when the command queue gets full. Must be atomic.
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* @nic_config: configure NIC, called before firmware is started.
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* May sleep
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* @wimax_active: invoked when WiMax becomes active. Must be atomic.
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*/
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struct iwl_op_mode_ops {
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struct iwl_op_mode *(*start)(struct iwl_trans *trans,
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const struct iwl_cfg *cfg,
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const struct iwl_fw *fw);
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void (*stop)(struct iwl_op_mode *op_mode);
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int (*rx)(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
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struct iwl_device_cmd *cmd);
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void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
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void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
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void (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
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void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
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void (*nic_error)(struct iwl_op_mode *op_mode);
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void (*cmd_queue_full)(struct iwl_op_mode *op_mode);
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void (*nic_config)(struct iwl_op_mode *op_mode);
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void (*wimax_active)(struct iwl_op_mode *op_mode);
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};
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int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
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void iwl_opmode_deregister(const char *name);
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/**
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* struct iwl_op_mode - operational mode
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*
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* This holds an implementation of the mac80211 / fw API.
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*
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* @ops - pointer to its own ops
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*/
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struct iwl_op_mode {
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const struct iwl_op_mode_ops *ops;
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const struct iwl_trans *trans;
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char op_mode_specific[0] __aligned(sizeof(void *));
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};
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static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
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{
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might_sleep();
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op_mode->ops->stop(op_mode);
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}
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static inline int iwl_op_mode_rx(struct iwl_op_mode *op_mode,
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struct iwl_rx_cmd_buffer *rxb,
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struct iwl_device_cmd *cmd)
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{
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return op_mode->ops->rx(op_mode, rxb, cmd);
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}
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static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
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int queue)
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{
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op_mode->ops->queue_full(op_mode, queue);
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}
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static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
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int queue)
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{
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op_mode->ops->queue_not_full(op_mode, queue);
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}
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static inline void iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode,
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bool state)
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{
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op_mode->ops->hw_rf_kill(op_mode, state);
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}
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static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
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struct sk_buff *skb)
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{
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op_mode->ops->free_skb(op_mode, skb);
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}
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static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode)
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{
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op_mode->ops->nic_error(op_mode);
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}
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static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode)
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{
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op_mode->ops->cmd_queue_full(op_mode);
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}
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static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
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{
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might_sleep();
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op_mode->ops->nic_config(op_mode);
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}
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static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
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{
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op_mode->ops->wimax_active(op_mode);
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}
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/*****************************************************
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* Op mode layers implementations
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******************************************************/
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extern const struct iwl_op_mode_ops iwl_dvm_ops;
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#endif /* __iwl_op_mode_h__ */
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