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1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2/*
3 * Copyright (C) 2005-2014, 2018-2021 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015 Intel Deutschland GmbH
6 */
7#ifndef __iwl_op_mode_h__
8#define __iwl_op_mode_h__
9
10#include <linux/netdevice.h>
11#include <linux/debugfs.h>
12#include "iwl-dbg-tlv.h"
13
14struct iwl_op_mode;
15struct iwl_trans;
16struct sk_buff;
17struct iwl_device_cmd;
18struct iwl_rx_cmd_buffer;
19struct iwl_fw;
20struct iwl_cfg;
21
22/**
23 * DOC: Operational mode - what is it ?
24 *
25 * The operational mode (a.k.a. op_mode) is the layer that implements
26 * mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses
27 * the transport API to access the HW. The op_mode doesn't need to know how the
28 * underlying HW works, since the transport layer takes care of that.
29 *
30 * There can be several op_mode: i.e. different fw APIs will require two
31 * different op_modes. This is why the op_mode is virtualized.
32 */
33
34/**
35 * DOC: Life cycle of the Operational mode
36 *
37 * The operational mode has a very simple life cycle.
38 *
39 * 1) The driver layer (iwl-drv.c) chooses the op_mode based on the
40 * capabilities advertised by the fw file (in TLV format).
41 * 2) The driver layer starts the op_mode (ops->start)
42 * 3) The op_mode registers mac80211
43 * 4) The op_mode is governed by mac80211
44 * 5) The driver layer stops the op_mode
45 */
46
47/**
48 * struct iwl_op_mode_ops - op_mode specific operations
49 *
50 * The op_mode exports its ops so that external components can start it and
51 * interact with it. The driver layer typically calls the start and stop
52 * handlers, the transport layer calls the others.
53 *
54 * All the handlers MUST be implemented, except @rx_rss which can be left
55 * out *iff* the opmode will never run on hardware with multi-queue capability.
56 *
57 * @start: start the op_mode. The transport layer is already allocated.
58 * May sleep
59 * @stop: stop the op_mode. Must free all the memory allocated.
60 * May sleep
61 * @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the
62 * HCMD this Rx responds to. Can't sleep.
63 * @rx_rss: data queue RX notification to the op_mode, for (data) notifications
64 * received on the RSS queue(s). The queue parameter indicates which of the
65 * RSS queues received this frame; it will always be non-zero.
66 * This method must not sleep.
67 * @queue_full: notifies that a HW queue is full.
68 * Must be atomic and called with BH disabled.
69 * @queue_not_full: notifies that a HW queue is not full any more.
70 * Must be atomic and called with BH disabled.
71 * @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that
72 * the radio is killed. Return %true if the device should be stopped by
73 * the transport immediately after the call. May sleep.
74 * @free_skb: allows the transport layer to free skbs that haven't been
75 * reclaimed by the op_mode. This can happen when the driver is freed and
76 * there are Tx packets pending in the transport layer.
77 * Must be atomic
78 * @nic_error: error notification. Must be atomic and must be called with BH
79 * disabled, unless the sync parameter is true.
80 * @cmd_queue_full: Called when the command queue gets full. Must be atomic and
81 * called with BH disabled.
82 * @nic_config: configure NIC, called before firmware is started.
83 * May sleep
84 * @wimax_active: invoked when WiMax becomes active. May sleep
85 * @time_point: called when transport layer wants to collect debug data
86 */
87struct iwl_op_mode_ops {
88 struct iwl_op_mode *(*start)(struct iwl_trans *trans,
89 const struct iwl_cfg *cfg,
90 const struct iwl_fw *fw,
91 struct dentry *dbgfs_dir);
92 void (*stop)(struct iwl_op_mode *op_mode);
93 void (*rx)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
94 struct iwl_rx_cmd_buffer *rxb);
95 void (*rx_rss)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
96 struct iwl_rx_cmd_buffer *rxb, unsigned int queue);
97 void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
98 void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
99 bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
100 void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
101 void (*nic_error)(struct iwl_op_mode *op_mode, bool sync);
102 void (*cmd_queue_full)(struct iwl_op_mode *op_mode);
103 void (*nic_config)(struct iwl_op_mode *op_mode);
104 void (*wimax_active)(struct iwl_op_mode *op_mode);
105 void (*time_point)(struct iwl_op_mode *op_mode,
106 enum iwl_fw_ini_time_point tp_id,
107 union iwl_dbg_tlv_tp_data *tp_data);
108};
109
110int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
111void iwl_opmode_deregister(const char *name);
112
113/**
114 * struct iwl_op_mode - operational mode
115 * @ops: pointer to its own ops
116 *
117 * This holds an implementation of the mac80211 / fw API.
118 */
119struct iwl_op_mode {
120 const struct iwl_op_mode_ops *ops;
121
122 char op_mode_specific[] __aligned(sizeof(void *));
123};
124
125static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
126{
127 might_sleep();
128 op_mode->ops->stop(op_mode);
129}
130
131static inline void iwl_op_mode_rx(struct iwl_op_mode *op_mode,
132 struct napi_struct *napi,
133 struct iwl_rx_cmd_buffer *rxb)
134{
135 return op_mode->ops->rx(op_mode, napi, rxb);
136}
137
138static inline void iwl_op_mode_rx_rss(struct iwl_op_mode *op_mode,
139 struct napi_struct *napi,
140 struct iwl_rx_cmd_buffer *rxb,
141 unsigned int queue)
142{
143 op_mode->ops->rx_rss(op_mode, napi, rxb, queue);
144}
145
146static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
147 int queue)
148{
149 op_mode->ops->queue_full(op_mode, queue);
150}
151
152static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
153 int queue)
154{
155 op_mode->ops->queue_not_full(op_mode, queue);
156}
157
158static inline bool __must_check
159iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
160{
161 might_sleep();
162 return op_mode->ops->hw_rf_kill(op_mode, state);
163}
164
165static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
166 struct sk_buff *skb)
167{
168 if (WARN_ON_ONCE(!op_mode))
169 return;
170 op_mode->ops->free_skb(op_mode, skb);
171}
172
173static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode, bool sync)
174{
175 op_mode->ops->nic_error(op_mode, sync);
176}
177
178static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode)
179{
180 op_mode->ops->cmd_queue_full(op_mode);
181}
182
183static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
184{
185 might_sleep();
186 op_mode->ops->nic_config(op_mode);
187}
188
189static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
190{
191 might_sleep();
192 op_mode->ops->wimax_active(op_mode);
193}
194
195static inline void iwl_op_mode_time_point(struct iwl_op_mode *op_mode,
196 enum iwl_fw_ini_time_point tp_id,
197 union iwl_dbg_tlv_tp_data *tp_data)
198{
199 if (!op_mode || !op_mode->ops || !op_mode->ops->time_point)
200 return;
201 op_mode->ops->time_point(op_mode, tp_id, tp_data);
202}
203
204#endif /* __iwl_op_mode_h__ */
1/******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2015 Intel Deutschland GmbH
11 * Copyright(c) 2018 - 2019 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
33 * Copyright(c) 2015 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2019 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 *****************************************************************************/
64#ifndef __iwl_op_mode_h__
65#define __iwl_op_mode_h__
66
67#include <linux/netdevice.h>
68#include <linux/debugfs.h>
69
70struct iwl_op_mode;
71struct iwl_trans;
72struct sk_buff;
73struct iwl_device_cmd;
74struct iwl_rx_cmd_buffer;
75struct iwl_fw;
76struct iwl_cfg;
77
78/**
79 * DOC: Operational mode - what is it ?
80 *
81 * The operational mode (a.k.a. op_mode) is the layer that implements
82 * mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses
83 * the transport API to access the HW. The op_mode doesn't need to know how the
84 * underlying HW works, since the transport layer takes care of that.
85 *
86 * There can be several op_mode: i.e. different fw APIs will require two
87 * different op_modes. This is why the op_mode is virtualized.
88 */
89
90/**
91 * DOC: Life cycle of the Operational mode
92 *
93 * The operational mode has a very simple life cycle.
94 *
95 * 1) The driver layer (iwl-drv.c) chooses the op_mode based on the
96 * capabilities advertised by the fw file (in TLV format).
97 * 2) The driver layer starts the op_mode (ops->start)
98 * 3) The op_mode registers mac80211
99 * 4) The op_mode is governed by mac80211
100 * 5) The driver layer stops the op_mode
101 */
102
103/**
104 * struct iwl_op_mode_ops - op_mode specific operations
105 *
106 * The op_mode exports its ops so that external components can start it and
107 * interact with it. The driver layer typically calls the start and stop
108 * handlers, the transport layer calls the others.
109 *
110 * All the handlers MUST be implemented, except @rx_rss which can be left
111 * out *iff* the opmode will never run on hardware with multi-queue capability.
112 *
113 * @start: start the op_mode. The transport layer is already allocated.
114 * May sleep
115 * @stop: stop the op_mode. Must free all the memory allocated.
116 * May sleep
117 * @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the
118 * HCMD this Rx responds to. Can't sleep.
119 * @rx_rss: data queue RX notification to the op_mode, for (data) notifications
120 * received on the RSS queue(s). The queue parameter indicates which of the
121 * RSS queues received this frame; it will always be non-zero.
122 * This method must not sleep.
123 * @async_cb: called when an ASYNC command with CMD_WANT_ASYNC_CALLBACK set
124 * completes. Must be atomic.
125 * @queue_full: notifies that a HW queue is full.
126 * Must be atomic and called with BH disabled.
127 * @queue_not_full: notifies that a HW queue is not full any more.
128 * Must be atomic and called with BH disabled.
129 * @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that
130 * the radio is killed. Return %true if the device should be stopped by
131 * the transport immediately after the call. May sleep.
132 * @free_skb: allows the transport layer to free skbs that haven't been
133 * reclaimed by the op_mode. This can happen when the driver is freed and
134 * there are Tx packets pending in the transport layer.
135 * Must be atomic
136 * @nic_error: error notification. Must be atomic and must be called with BH
137 * disabled.
138 * @cmd_queue_full: Called when the command queue gets full. Must be atomic and
139 * called with BH disabled.
140 * @nic_config: configure NIC, called before firmware is started.
141 * May sleep
142 * @wimax_active: invoked when WiMax becomes active. May sleep
143 */
144struct iwl_op_mode_ops {
145 struct iwl_op_mode *(*start)(struct iwl_trans *trans,
146 const struct iwl_cfg *cfg,
147 const struct iwl_fw *fw,
148 struct dentry *dbgfs_dir);
149 void (*stop)(struct iwl_op_mode *op_mode);
150 void (*rx)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
151 struct iwl_rx_cmd_buffer *rxb);
152 void (*rx_rss)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
153 struct iwl_rx_cmd_buffer *rxb, unsigned int queue);
154 void (*async_cb)(struct iwl_op_mode *op_mode,
155 const struct iwl_device_cmd *cmd);
156 void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
157 void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
158 bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
159 void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
160 void (*nic_error)(struct iwl_op_mode *op_mode);
161 void (*cmd_queue_full)(struct iwl_op_mode *op_mode);
162 void (*nic_config)(struct iwl_op_mode *op_mode);
163 void (*wimax_active)(struct iwl_op_mode *op_mode);
164};
165
166int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
167void iwl_opmode_deregister(const char *name);
168
169/**
170 * struct iwl_op_mode - operational mode
171 * @ops: pointer to its own ops
172 *
173 * This holds an implementation of the mac80211 / fw API.
174 */
175struct iwl_op_mode {
176 const struct iwl_op_mode_ops *ops;
177
178 char op_mode_specific[] __aligned(sizeof(void *));
179};
180
181static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
182{
183 might_sleep();
184 op_mode->ops->stop(op_mode);
185}
186
187static inline void iwl_op_mode_rx(struct iwl_op_mode *op_mode,
188 struct napi_struct *napi,
189 struct iwl_rx_cmd_buffer *rxb)
190{
191 return op_mode->ops->rx(op_mode, napi, rxb);
192}
193
194static inline void iwl_op_mode_rx_rss(struct iwl_op_mode *op_mode,
195 struct napi_struct *napi,
196 struct iwl_rx_cmd_buffer *rxb,
197 unsigned int queue)
198{
199 op_mode->ops->rx_rss(op_mode, napi, rxb, queue);
200}
201
202static inline void iwl_op_mode_async_cb(struct iwl_op_mode *op_mode,
203 const struct iwl_device_cmd *cmd)
204{
205 if (op_mode->ops->async_cb)
206 op_mode->ops->async_cb(op_mode, cmd);
207}
208
209static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
210 int queue)
211{
212 op_mode->ops->queue_full(op_mode, queue);
213}
214
215static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
216 int queue)
217{
218 op_mode->ops->queue_not_full(op_mode, queue);
219}
220
221static inline bool __must_check
222iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
223{
224 might_sleep();
225 return op_mode->ops->hw_rf_kill(op_mode, state);
226}
227
228static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
229 struct sk_buff *skb)
230{
231 op_mode->ops->free_skb(op_mode, skb);
232}
233
234static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode)
235{
236 op_mode->ops->nic_error(op_mode);
237}
238
239static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode)
240{
241 op_mode->ops->cmd_queue_full(op_mode);
242}
243
244static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
245{
246 might_sleep();
247 op_mode->ops->nic_config(op_mode);
248}
249
250static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
251{
252 might_sleep();
253 op_mode->ops->wimax_active(op_mode);
254}
255
256#endif /* __iwl_op_mode_h__ */