1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright (C) 2005-2014, 2018-2021, 2024 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015 Intel Deutschland GmbH
7 #ifndef __iwl_op_mode_h__
8 #define __iwl_op_mode_h__
10 #include <linux/netdevice.h>
11 #include <linux/debugfs.h>
12 #include "iwl-dbg-tlv.h"
17 struct iwl_device_cmd;
18 struct iwl_rx_cmd_buffer;
23 * DOC: Operational mode - what is it ?
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.
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.
35 * DOC: Life cycle of the Operational mode
37 * The operational mode has a very simple life cycle.
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
48 * enum iwl_fw_error_type - FW error types/sources
49 * @IWL_ERR_TYPE_IRQ: "normal" FW error through an IRQ
50 * @IWL_ERR_TYPE_NMI_FORCED: NMI was forced by driver
51 * @IWL_ERR_TYPE_RESET_HS_TIMEOUT: reset handshake timed out,
52 * any debug collection must happen synchronously as
53 * the device will be shut down
54 * @IWL_ERR_TYPE_CMD_QUEUE_FULL: command queue was full
56 enum iwl_fw_error_type {
58 IWL_ERR_TYPE_NMI_FORCED,
59 IWL_ERR_TYPE_RESET_HS_TIMEOUT,
60 IWL_ERR_TYPE_CMD_QUEUE_FULL,
64 * enum iwl_fw_error_context - error dump context
65 * @IWL_ERR_CONTEXT_WORKER: regular from worker context,
66 * opmode must acquire locks and must also check
67 * for @IWL_ERR_CONTEXT_ABORT after acquiring locks
68 * @IWL_ERR_CONTEXT_FROM_OPMODE: context is in a call
69 * originating from the opmode, e.g. while resetting
70 * or stopping the device, so opmode must not acquire
72 * @IWL_ERR_CONTEXT_ABORT: after lock acquisition, indicates
73 * that the dump already happened via another callback
74 * (currently only while stopping the device) via the
75 * @IWL_ERR_CONTEXT_FROM_OPMODE context, and this call
78 enum iwl_fw_error_context {
79 IWL_ERR_CONTEXT_WORKER,
80 IWL_ERR_CONTEXT_FROM_OPMODE,
81 IWL_ERR_CONTEXT_ABORT,
85 * struct iwl_fw_error_dump_mode - error dump mode for callback
86 * @type: The reason for the dump, per &enum iwl_fw_error_type.
87 * @context: The context for the dump, may also indicate this
88 * call needs to be skipped. This MUST be checked before
89 * and after acquiring any locks in the op-mode!
91 struct iwl_fw_error_dump_mode {
92 enum iwl_fw_error_type type;
93 enum iwl_fw_error_context context;
97 * struct iwl_op_mode_ops - op_mode specific operations
99 * The op_mode exports its ops so that external components can start it and
100 * interact with it. The driver layer typically calls the start and stop
101 * handlers, the transport layer calls the others.
103 * All the handlers MUST be implemented, except @rx_rss which can be left
104 * out *iff* the opmode will never run on hardware with multi-queue capability.
106 * @start: start the op_mode. The transport layer is already allocated.
108 * @stop: stop the op_mode. Must free all the memory allocated.
110 * @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the
111 * HCMD this Rx responds to. Can't sleep.
112 * @rx_rss: data queue RX notification to the op_mode, for (data) notifications
113 * received on the RSS queue(s). The queue parameter indicates which of the
114 * RSS queues received this frame; it will always be non-zero.
115 * This method must not sleep.
116 * @queue_full: notifies that a HW queue is full.
117 * Must be atomic and called with BH disabled.
118 * @queue_not_full: notifies that a HW queue is not full any more.
119 * Must be atomic and called with BH disabled.
120 * @hw_rf_kill: notifies of a change in the HW rf kill switch. True means that
121 * the radio is killed. Return %true if the device should be stopped by
122 * the transport immediately after the call. May sleep.
123 * Note that this must not return %true for newer devices using gen2 PCIe
125 * @free_skb: allows the transport layer to free skbs that haven't been
126 * reclaimed by the op_mode. This can happen when the driver is freed and
127 * there are Tx packets pending in the transport layer.
129 * @nic_error: error notification. Must be atomic, the op mode should handle
130 * the error (e.g. abort notification waiters) and print the error if
132 * @dump_error: NIC error dump collection (can sleep, synchronous)
133 * @sw_reset: (maybe) initiate a software reset, return %true if started
134 * @nic_config: configure NIC, called before firmware is started.
136 * @wimax_active: invoked when WiMax becomes active. May sleep
137 * @time_point: called when transport layer wants to collect debug data
138 * @device_powered_off: called upon resume from hibernation but not only.
139 * Op_mode needs to reset its internal state because the device did not
140 * survive the system state transition. The firmware is no longer running,
143 struct iwl_op_mode_ops {
144 struct iwl_op_mode *(*start)(struct iwl_trans *trans,
145 const struct iwl_cfg *cfg,
146 const struct iwl_fw *fw,
147 struct dentry *dbgfs_dir);
148 void (*stop)(struct iwl_op_mode *op_mode);
149 void (*rx)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
150 struct iwl_rx_cmd_buffer *rxb);
151 void (*rx_rss)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
152 struct iwl_rx_cmd_buffer *rxb, unsigned int queue);
153 void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
154 void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
155 bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
156 void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
157 void (*nic_error)(struct iwl_op_mode *op_mode,
158 enum iwl_fw_error_type type);
159 void (*dump_error)(struct iwl_op_mode *op_mode,
160 struct iwl_fw_error_dump_mode *mode);
161 bool (*sw_reset)(struct iwl_op_mode *op_mode,
162 enum iwl_fw_error_type type);
163 void (*nic_config)(struct iwl_op_mode *op_mode);
164 void (*wimax_active)(struct iwl_op_mode *op_mode);
165 void (*time_point)(struct iwl_op_mode *op_mode,
166 enum iwl_fw_ini_time_point tp_id,
167 union iwl_dbg_tlv_tp_data *tp_data);
168 void (*device_powered_off)(struct iwl_op_mode *op_mode);
171 int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
172 void iwl_opmode_deregister(const char *name);
175 * struct iwl_op_mode - operational mode
176 * @ops: pointer to its own ops
178 * This holds an implementation of the mac80211 / fw API.
181 const struct iwl_op_mode_ops *ops;
183 char op_mode_specific[] __aligned(sizeof(void *));
186 static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
189 op_mode->ops->stop(op_mode);
192 static inline void iwl_op_mode_rx(struct iwl_op_mode *op_mode,
193 struct napi_struct *napi,
194 struct iwl_rx_cmd_buffer *rxb)
196 return op_mode->ops->rx(op_mode, napi, rxb);
199 static inline void iwl_op_mode_rx_rss(struct iwl_op_mode *op_mode,
200 struct napi_struct *napi,
201 struct iwl_rx_cmd_buffer *rxb,
204 op_mode->ops->rx_rss(op_mode, napi, rxb, queue);
207 static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
210 op_mode->ops->queue_full(op_mode, queue);
213 static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
216 op_mode->ops->queue_not_full(op_mode, queue);
219 static inline bool __must_check
220 iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
223 return op_mode->ops->hw_rf_kill(op_mode, state);
226 static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
229 if (WARN_ON_ONCE(!op_mode))
231 op_mode->ops->free_skb(op_mode, skb);
234 static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode,
235 enum iwl_fw_error_type type)
237 op_mode->ops->nic_error(op_mode, type);
240 static inline void iwl_op_mode_dump_error(struct iwl_op_mode *op_mode,
241 struct iwl_fw_error_dump_mode *mode)
245 if (op_mode->ops->dump_error)
246 op_mode->ops->dump_error(op_mode, mode);
249 static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
252 if (op_mode->ops->nic_config)
253 op_mode->ops->nic_config(op_mode);
256 static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
259 op_mode->ops->wimax_active(op_mode);
262 static inline void iwl_op_mode_time_point(struct iwl_op_mode *op_mode,
263 enum iwl_fw_ini_time_point tp_id,
264 union iwl_dbg_tlv_tp_data *tp_data)
266 if (!op_mode || !op_mode->ops || !op_mode->ops->time_point)
268 op_mode->ops->time_point(op_mode, tp_id, tp_data);
271 static inline void iwl_op_mode_device_powered_off(struct iwl_op_mode *op_mode)
273 if (!op_mode || !op_mode->ops || !op_mode->ops->device_powered_off)
275 op_mode->ops->device_powered_off(op_mode);
278 #endif /* __iwl_op_mode_h__ */