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65 #ifndef __iwl_op_mode_h__
66 #define __iwl_op_mode_h__
68 #include <linux/netdevice.h>
69 #include <linux/debugfs.h>
74 struct iwl_device_cmd;
75 struct iwl_rx_cmd_buffer;
80 * DOC: Operational mode - what is it ?
82 * The operational mode (a.k.a. op_mode) is the layer that implements
83 * mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses
84 * the transport API to access the HW. The op_mode doesn't need to know how the
85 * underlying HW works, since the transport layer takes care of that.
87 * There can be several op_mode: i.e. different fw APIs will require two
88 * different op_modes. This is why the op_mode is virtualized.
92 * DOC: Life cycle of the Operational mode
94 * The operational mode has a very simple life cycle.
96 * 1) The driver layer (iwl-drv.c) chooses the op_mode based on the
97 * capabilities advertized by the fw file (in TLV format).
98 * 2) The driver layer starts the op_mode (ops->start)
99 * 3) The op_mode registers mac80211
100 * 4) The op_mode is governed by mac80211
101 * 5) The driver layer stops the op_mode
105 * struct iwl_op_mode_ops - op_mode specific operations
107 * The op_mode exports its ops so that external components can start it and
108 * interact with it. The driver layer typically calls the start and stop
109 * handlers, the transport layer calls the others.
111 * All the handlers MUST be implemented
113 * @start: start the op_mode. The transport layer is already allocated.
115 * @stop: stop the op_mode. Must free all the memory allocated.
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 * @napi_add: NAPI initialisation. The transport is fully responsible for NAPI,
120 * but the higher layers need to know about it (in particular mac80211 to
121 * to able to call the right NAPI RX functions); this function is needed
122 * to eventually call netif_napi_add() with higher layer involvement.
123 * @queue_full: notifies that a HW queue is full.
124 * Must be atomic and called with BH disabled.
125 * @queue_not_full: notifies that a HW queue is not full any more.
126 * Must be atomic and called with BH disabled.
127 * @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that
128 * the radio is killed. Return %true if the device should be stopped by
129 * the transport immediately after the call. May sleep.
130 * @free_skb: allows the transport layer to free skbs that haven't been
131 * reclaimed by the op_mode. This can happen when the driver is freed and
132 * there are Tx packets pending in the transport layer.
134 * @nic_error: error notification. Must be atomic and must be called with BH
136 * @cmd_queue_full: Called when the command queue gets full. Must be atomic and
137 * called with BH disabled.
138 * @nic_config: configure NIC, called before firmware is started.
140 * @wimax_active: invoked when WiMax becomes active. May sleep
141 * @enter_d0i3: configure the fw to enter d0i3. May sleep.
142 * @exit_d0i3: configure the fw to exit d0i3. May sleep.
144 struct 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 int (*rx)(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
151 struct iwl_device_cmd *cmd);
152 void (*napi_add)(struct iwl_op_mode *op_mode,
153 struct napi_struct *napi,
154 struct net_device *napi_dev,
155 int (*poll)(struct napi_struct *, int),
157 void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
158 void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
159 bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
160 void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
161 void (*nic_error)(struct iwl_op_mode *op_mode);
162 void (*cmd_queue_full)(struct iwl_op_mode *op_mode);
163 void (*nic_config)(struct iwl_op_mode *op_mode);
164 void (*wimax_active)(struct iwl_op_mode *op_mode);
165 int (*enter_d0i3)(struct iwl_op_mode *op_mode);
166 int (*exit_d0i3)(struct iwl_op_mode *op_mode);
169 int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
170 void iwl_opmode_deregister(const char *name);
173 * struct iwl_op_mode - operational mode
174 * @ops: pointer to its own ops
176 * This holds an implementation of the mac80211 / fw API.
179 const struct iwl_op_mode_ops *ops;
181 char op_mode_specific[0] __aligned(sizeof(void *));
184 static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
187 op_mode->ops->stop(op_mode);
190 static inline int iwl_op_mode_rx(struct iwl_op_mode *op_mode,
191 struct iwl_rx_cmd_buffer *rxb,
192 struct iwl_device_cmd *cmd)
194 return op_mode->ops->rx(op_mode, rxb, cmd);
197 static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
200 op_mode->ops->queue_full(op_mode, queue);
203 static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
206 op_mode->ops->queue_not_full(op_mode, queue);
209 static inline bool __must_check
210 iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
213 return op_mode->ops->hw_rf_kill(op_mode, state);
216 static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
219 op_mode->ops->free_skb(op_mode, skb);
222 static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode)
224 op_mode->ops->nic_error(op_mode);
227 static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode)
229 op_mode->ops->cmd_queue_full(op_mode);
232 static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
235 op_mode->ops->nic_config(op_mode);
238 static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
241 op_mode->ops->wimax_active(op_mode);
244 static inline int iwl_op_mode_enter_d0i3(struct iwl_op_mode *op_mode)
248 if (!op_mode->ops->enter_d0i3)
250 return op_mode->ops->enter_d0i3(op_mode);
253 static inline int iwl_op_mode_exit_d0i3(struct iwl_op_mode *op_mode)
257 if (!op_mode->ops->exit_d0i3)
259 return op_mode->ops->exit_d0i3(op_mode);
262 static inline void iwl_op_mode_napi_add(struct iwl_op_mode *op_mode,
263 struct napi_struct *napi,
264 struct net_device *napi_dev,
265 int (*poll)(struct napi_struct *, int),
268 if (!op_mode->ops->napi_add)
270 op_mode->ops->napi_add(op_mode, napi, napi_dev, poll, weight);
273 #endif /* __iwl_op_mode_h__ */