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d0f76d68 EG |
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 - 2012 Intel Corporation. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called LICENSE.GPL. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #ifndef __iwl_op_mode_h__ | |
64 | #define __iwl_op_mode_h__ | |
65 | ||
66 | struct iwl_op_mode; | |
67 | struct iwl_trans; | |
ed277c93 | 68 | struct sk_buff; |
db70f290 EG |
69 | struct iwl_device_cmd; |
70 | struct iwl_rx_mem_buffer; | |
d0f76d68 | 71 | |
53476fe1 EG |
72 | /** |
73 | * DOC: Operational mode - what is it ? | |
74 | * | |
75 | * The operational mode (a.k.a. op_mode) is the layer that implements | |
76 | * mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses | |
77 | * the transport API to access the HW. The op_mode doesn't need to know how the | |
78 | * underlying HW works, since the transport layer takes care of that. | |
79 | * | |
80 | * There can be several op_mode: i.e. different fw APIs will require two | |
81 | * different op_modes. This is why the op_mode is virtualized. | |
82 | */ | |
83 | ||
84 | /** | |
85 | * DOC: Life cycle of the Operational mode | |
86 | * | |
87 | * The operational mode has a very simple life cycle. | |
88 | * | |
89 | * 1) The driver layer (iwl-drv.c) chooses the op_mode based on the | |
90 | * capabilities advertized by the fw file (in TLV format). | |
91 | * 2) The driver layer starts the op_mode (ops->start) | |
92 | * 3) The op_mode registers registers mac80211 | |
93 | * 4) The op_mode is governed by mac80211 | |
94 | * 5) The driver layer stops the op_mode | |
95 | */ | |
96 | ||
d0f76d68 EG |
97 | /** |
98 | * struct iwl_op_mode_ops - op_mode specific operations | |
99 | * | |
53476fe1 EG |
100 | * The op_mode exports its ops so that external components can start it and |
101 | * interact with it. The driver layer typically calls the start and stop | |
102 | * handlers, the transport layer calls the others. | |
103 | * | |
d0f76d68 EG |
104 | * All the handlers MUST be implemented |
105 | * | |
53476fe1 | 106 | * @start: start the op_mode. The transport layer is already allocated. |
d0f76d68 | 107 | * May sleep |
53476fe1 | 108 | * @stop: stop the op_mode. Must free all the memory allocated. |
d0f76d68 | 109 | * May sleep |
db70f290 EG |
110 | * @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the |
111 | * HCMD the this Rx responds to. | |
53476fe1 | 112 | * Must be atomic. |
02e38358 EG |
113 | * @queue_full: notifies that a HW queue is full. Ac is the ac of the queue |
114 | * Must be atomic | |
115 | * @queue_not_full: notifies that a HW queue is not full any more. | |
116 | * Ac is the ac of the queue. Must be atomic | |
7120d989 EG |
117 | * @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that |
118 | * the radio is killed. Must be atomic. | |
ed277c93 EG |
119 | * @free_skb: allows the transport layer to free skbs that haven't been |
120 | * reclaimed by the op_mode. This can happen when the driver is freed and | |
121 | * there are Tx packets pending in the transport layer. | |
122 | * Must be atomic | |
bcb9321c | 123 | * @nic_error: error notification. Must be atomic |
d0f76d68 EG |
124 | */ |
125 | struct iwl_op_mode_ops { | |
126 | struct iwl_op_mode *(*start)(struct iwl_trans *trans); | |
127 | void (*stop)(struct iwl_op_mode *op_mode); | |
db70f290 EG |
128 | int (*rx)(struct iwl_op_mode *op_mode, struct iwl_rx_mem_buffer *rxb, |
129 | struct iwl_device_cmd *cmd); | |
02e38358 EG |
130 | void (*queue_full)(struct iwl_op_mode *op_mode, u8 ac); |
131 | void (*queue_not_full)(struct iwl_op_mode *op_mode, u8 ac); | |
7120d989 | 132 | void (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state); |
ed277c93 | 133 | void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb); |
bcb9321c | 134 | void (*nic_error)(struct iwl_op_mode *op_mode); |
d0f76d68 EG |
135 | }; |
136 | ||
137 | /** | |
138 | * struct iwl_op_mode - operational mode | |
139 | * | |
140 | * This holds an implementation of the mac80211 / fw API. | |
141 | * | |
142 | * @ops - pointer to its own ops | |
143 | */ | |
144 | struct iwl_op_mode { | |
145 | const struct iwl_op_mode_ops *ops; | |
146 | const struct iwl_trans *trans; | |
147 | ||
148 | char op_mode_specific[0] __aligned(sizeof(void *)); | |
149 | }; | |
150 | ||
151 | static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode) | |
152 | { | |
53476fe1 EG |
153 | might_sleep(); |
154 | ||
d0f76d68 EG |
155 | op_mode->ops->stop(op_mode); |
156 | } | |
157 | ||
db70f290 EG |
158 | static inline int iwl_op_mode_rx(struct iwl_op_mode *op_mode, |
159 | struct iwl_rx_mem_buffer *rxb, | |
160 | struct iwl_device_cmd *cmd) | |
161 | { | |
162 | return op_mode->ops->rx(op_mode, rxb, cmd); | |
163 | } | |
164 | ||
02e38358 EG |
165 | static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode, u8 ac) |
166 | { | |
167 | op_mode->ops->queue_full(op_mode, ac); | |
168 | } | |
169 | ||
170 | static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode, | |
171 | u8 ac) | |
172 | { | |
173 | op_mode->ops->queue_not_full(op_mode, ac); | |
174 | } | |
175 | ||
7120d989 EG |
176 | static inline void iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, |
177 | bool state) | |
178 | { | |
179 | op_mode->ops->hw_rf_kill(op_mode, state); | |
180 | } | |
181 | ||
ed277c93 EG |
182 | static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode, |
183 | struct sk_buff *skb) | |
184 | { | |
185 | op_mode->ops->free_skb(op_mode, skb); | |
186 | } | |
187 | ||
bcb9321c EG |
188 | static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode) |
189 | { | |
190 | op_mode->ops->nic_error(op_mode); | |
191 | } | |
192 | ||
d0f76d68 EG |
193 | /***************************************************** |
194 | * Op mode layers implementations | |
195 | ******************************************************/ | |
196 | extern const struct iwl_op_mode_ops iwl_dvm_ops; | |
197 | ||
198 | #endif /* __iwl_op_mode_h__ */ |