mirror of https://gitee.com/openkylin/linux.git
275 lines
9.6 KiB
C
275 lines
9.6 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 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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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 COPYING.
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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 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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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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#include <linux/netdevice.h>
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#include <linux/debugfs.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 advertised 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 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 this Rx responds to. Can't sleep.
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* @napi_add: NAPI initialization. The transport is fully responsible for NAPI,
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* but the higher layers need to know about it (in particular mac80211 to
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* to able to call the right NAPI RX functions); this function is needed
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* to eventually call netif_napi_add() with higher layer involvement.
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* @queue_full: notifies that a HW queue is full.
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* Must be atomic and called with BH disabled.
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* @queue_not_full: notifies that a HW queue is not full any more.
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* Must be atomic and called with BH disabled.
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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. Return %true if the device should be stopped by
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* the transport immediately after the call. May sleep.
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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 and must be called with BH
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* disabled.
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* @cmd_queue_full: Called when the command queue gets full. Must be atomic and
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* called with BH disabled.
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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. May sleep
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* @enter_d0i3: configure the fw to enter d0i3. return 1 to indicate d0i3
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* entrance is aborted (e.g. due to held reference). May sleep.
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* @exit_d0i3: configure the fw to exit d0i3. May sleep.
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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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struct dentry *dbgfs_dir);
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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 (*napi_add)(struct iwl_op_mode *op_mode,
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struct napi_struct *napi,
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struct net_device *napi_dev,
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int (*poll)(struct napi_struct *, int),
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int weight);
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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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bool (*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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int (*enter_d0i3)(struct iwl_op_mode *op_mode);
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int (*exit_d0i3)(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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* @ops: pointer to its own ops
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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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struct iwl_op_mode {
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const struct iwl_op_mode_ops *ops;
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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 bool __must_check
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iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
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{
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might_sleep();
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return 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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might_sleep();
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op_mode->ops->wimax_active(op_mode);
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}
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static inline int iwl_op_mode_enter_d0i3(struct iwl_op_mode *op_mode)
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{
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might_sleep();
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if (!op_mode->ops->enter_d0i3)
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return 0;
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return op_mode->ops->enter_d0i3(op_mode);
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}
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static inline int iwl_op_mode_exit_d0i3(struct iwl_op_mode *op_mode)
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{
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might_sleep();
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if (!op_mode->ops->exit_d0i3)
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return 0;
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return op_mode->ops->exit_d0i3(op_mode);
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}
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static inline void iwl_op_mode_napi_add(struct iwl_op_mode *op_mode,
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struct napi_struct *napi,
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struct net_device *napi_dev,
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int (*poll)(struct napi_struct *, int),
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int weight)
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{
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if (!op_mode->ops->napi_add)
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return;
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op_mode->ops->napi_add(op_mode, napi, napi_dev, poll, weight);
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}
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#endif /* __iwl_op_mode_h__ */
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