1 /* 2 * Copyright (c) 2014-2018 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #if !defined(__SCHEDULER_API_H) 20 #define __SCHEDULER_API_H 21 22 #include <qdf_event.h> 23 #include <qdf_types.h> 24 #include <qdf_lock.h> 25 #include <qdf_mc_timer.h> 26 #include <qdf_status.h> 27 28 /* Controller thread various event masks 29 * MC_POST_EVENT_MASK: wake up thread after posting message 30 * MC_SUSPEND_EVENT_MASK: signal thread to suspend during kernel pm suspend 31 * MC_SHUTDOWN_EVENT_MASK: signal thread to shutdown and exit during unload 32 */ 33 #define MC_POST_EVENT_MASK 0x001 34 #define MC_SUSPEND_EVENT_MASK 0x002 35 #define MC_SHUTDOWN_EVENT_MASK 0x010 36 37 /* 38 * Cookie for timer messages. Note that anyone posting a timer message 39 * has to write the COOKIE in the reserved field of the message. The 40 * timer queue handler relies on this COOKIE 41 */ 42 #define SYS_MSG_COOKIE 0xFACE 43 44 #define scheduler_get_src_id(qid) (((qid) >> 20) & 0x3FF) 45 #define scheduler_get_dest_id(qid) (((qid) >> 10) & 0x3FF) 46 #define scheduler_get_que_id(qid) ((qid) & 0x3FF) 47 #define scheduler_get_qid(src, dest, que_id) ((que_id) | ((dest) << 10) |\ 48 ((src) << 20)) 49 50 typedef enum { 51 SYS_MSG_ID_MC_TIMER, 52 SYS_MSG_ID_FTM_RSP, 53 SYS_MSG_ID_QVIT, 54 SYS_MSG_ID_DATA_STALL_MSG, 55 SYS_MSG_ID_UMAC_STOP, 56 } SYS_MSG_ID; 57 58 /** 59 * struct scheduler_msg: scheduler message structure 60 * @type: message type 61 * @reserved: reserved field 62 * @bodyval: message body val 63 * @bodyptr: message body pointer based on the type either a bodyptr pointer 64 * into memory or bodyval as a 32 bit data is used. bodyptr is always a 65 * freeable pointer, one should always make sure that bodyptr is always 66 * freeable. 67 * Messages should use either bodyptr or bodyval; not both !!! 68 * @callback: callback to be called by scheduler thread once message is posted 69 * and scheduler thread has started processing the message. 70 * @flush_callback: flush callback which will be invoked during driver unload 71 * such that component can release the ref count of common global objects 72 * like PSOC, PDEV, VDEV and PEER. A component needs to populate flush 73 * callback in message body pointer for those messages which have taken ref 74 * count for above mentioned common objects. 75 * @node: list node for queue membership 76 * @queue_id: Id of the queue the message was added to 77 * @queue_depth: depth of the queue when the message was queued 78 * @queued_at_us: timestamp when the message was queued in microseconds 79 */ 80 struct scheduler_msg { 81 uint16_t type; 82 uint16_t reserved; 83 uint32_t bodyval; 84 void *bodyptr; 85 void *callback; 86 void *flush_callback; 87 qdf_list_node_t node; 88 #ifdef WLAN_SCHED_HISTORY_SIZE 89 QDF_MODULE_ID queue_id; 90 uint32_t queue_depth; 91 uint64_t queued_at_us; 92 #endif /* WLAN_SCHED_HISTORY_SIZE */ 93 }; 94 95 typedef QDF_STATUS (*scheduler_msg_process_fn_t) (struct scheduler_msg *msg); 96 typedef void (*hdd_suspend_callback)(void); 97 98 /** 99 * scheduler_init() - initialize control path scheduler 100 * 101 * This API initializes control path scheduler. 102 * 103 * Return: QDF status 104 */ 105 QDF_STATUS scheduler_init(void); 106 107 /** 108 * scheduler_deinit() - de-initialize control path scheduler 109 * 110 * This API de-initializes control path scheduler. 111 * 112 * Return: QDF status 113 */ 114 QDF_STATUS scheduler_deinit(void); 115 116 /** 117 * scheduler_enable() - start the scheduler module 118 * 119 * Ready the scheduler module to service requests, and start the scheduler's 120 * message processing thread. Must only be called after scheduler_init(). 121 * 122 * Return: QDF_STATUS 123 */ 124 QDF_STATUS scheduler_enable(void); 125 126 /** 127 * scheduler_disable() - stop the scheduler module 128 * 129 * Stop the scheduler module from servicing requests, and terminate the 130 * scheduler's message processing thread. Must be called before 131 * scheduler_deinit(). 132 * 133 * Return: QDF_STATUS 134 */ 135 QDF_STATUS scheduler_disable(void); 136 137 /** 138 * scheduler_register_module() - register input module/queue id 139 * @qid: queue id to get registered 140 * @callback: queue message to be called when a message is posted 141 * 142 * Return: QDF status 143 */ 144 QDF_STATUS scheduler_register_module(QDF_MODULE_ID qid, 145 scheduler_msg_process_fn_t callback); 146 147 /** 148 * scheduler_deregister_module() - deregister input module/queue id 149 * @qid: queue id to get deregistered 150 * 151 * Return: QDF status 152 */ 153 QDF_STATUS scheduler_deregister_module(QDF_MODULE_ID qid); 154 155 /** 156 * scheduler_post_msg_by_priority() - post messages by priority 157 * @qid: queue id to which the message has to be posted. 158 * @msg: message pointer 159 * @is_high_priority: set to true for high priority message else false 160 * 161 * Return: QDF status 162 */ 163 QDF_STATUS scheduler_post_msg_by_priority(uint32_t qid, 164 struct scheduler_msg *msg, 165 bool is_high_priority); 166 167 /** 168 * scheduler_post_msg() - post normal messages(no priority) 169 * @qid: queue id to which the message has to be posted. 170 * @msg: message pointer 171 * 172 * Return: QDF status 173 */ 174 static inline QDF_STATUS scheduler_post_msg(uint32_t qid, 175 struct scheduler_msg *msg) 176 { 177 return scheduler_post_msg_by_priority(qid, msg, false); 178 } 179 180 /** 181 * scheduler_post_message() - post normal messages(no priority) 182 * @src_id: Source module of the message 183 * @dest_id: Destination module of the message 184 * @que_id: Queue to which the message has to posted. 185 * @msg: message pointer 186 * 187 * This function will mask the src_id, and destination id to qid of 188 * scheduler_post_msg 189 * Return: QDF status 190 */ 191 static inline QDF_STATUS scheduler_post_message(QDF_MODULE_ID src_id, 192 QDF_MODULE_ID dest_id, 193 QDF_MODULE_ID que_id, 194 struct scheduler_msg *msg) 195 { 196 return scheduler_post_msg(scheduler_get_qid(src_id, dest_id, que_id), 197 msg); 198 } 199 200 /** 201 * scheduler_resume() - resume scheduler thread 202 * 203 * Complete scheduler thread resume wait event such that scheduler 204 * thread can wake up and process message queues 205 * 206 * Return: none 207 */ 208 void scheduler_resume(void); 209 210 /** 211 * scheduler_register_hdd_suspend_callback() - suspend callback to hdd 212 * @callback: hdd callback to be called when controllred thread is suspended 213 * 214 * Return: none 215 */ 216 void scheduler_register_hdd_suspend_callback(hdd_suspend_callback callback); 217 218 /** 219 * scheduler_wake_up_controller_thread() - wake up controller thread 220 * 221 * Wake up controller thread to process a critical message. 222 * 223 * Return: none 224 */ 225 void scheduler_wake_up_controller_thread(void); 226 227 /** 228 * scheduler_set_event_mask() - set given event mask 229 * @event_mask: event mask to set 230 * 231 * Set given event mask such that controller scheduler thread can do 232 * specified work after wake up. 233 * 234 * Return: none 235 */ 236 void scheduler_set_event_mask(uint32_t event_mask); 237 238 /** 239 * scheduler_clear_event_mask() - clear given event mask 240 * @event_mask: event mask to set 241 * 242 * Return: none 243 */ 244 void scheduler_clear_event_mask(uint32_t event_mask); 245 246 /** 247 * scheduler_target_if_mq_handler() - top level message queue handler for 248 * target_if message queue 249 * @msg: pointer to actual message being handled 250 * 251 * Return: none 252 */ 253 QDF_STATUS scheduler_target_if_mq_handler(struct scheduler_msg *msg); 254 255 /** 256 * scheduler_os_if_mq_handler() - top level message queue handler for 257 * os_if message queue 258 * @msg: pointer to actual message being handled 259 * 260 * Return: none 261 */ 262 QDF_STATUS scheduler_os_if_mq_handler(struct scheduler_msg *msg); 263 264 /** 265 * scheduler_timer_q_mq_handler() - top level message queue handler for 266 * timer queue 267 * @msg: pointer to actual message being handled 268 * 269 * Return: none 270 */ 271 QDF_STATUS scheduler_timer_q_mq_handler(struct scheduler_msg *msg); 272 273 /** 274 * scheduler_scan_mq_handler() - top level message queue handler for 275 * scan queue 276 * @msg: pointer to actual message being handled 277 * 278 * Return: QDF status 279 */ 280 QDF_STATUS scheduler_scan_mq_handler(struct scheduler_msg *msg); 281 282 /** 283 * scheduler_register_wma_legacy_handler() - register legacy wma handler 284 * @callback: legacy wma handler to be called for WMA messages 285 * 286 * Return: QDF status 287 */ 288 QDF_STATUS scheduler_register_wma_legacy_handler(scheduler_msg_process_fn_t 289 callback); 290 291 /** 292 * scheduler_register_sys_legacy_handler() - register legacy sys handler 293 * @callback: legacy sys handler to be called for sys messages 294 * 295 * Return: QDF status 296 */ 297 QDF_STATUS scheduler_register_sys_legacy_handler(scheduler_msg_process_fn_t 298 callback); 299 /** 300 * scheduler_deregister_sys_legacy_handler() - deregister legacy sys handler 301 * 302 * Return: QDF status 303 */ 304 QDF_STATUS scheduler_deregister_sys_legacy_handler(void); 305 306 /** 307 * scheduler_deregister_wma_legacy_handler() - deregister legacy wma handler 308 * 309 * Return: QDF status 310 */ 311 QDF_STATUS scheduler_deregister_wma_legacy_handler(void); 312 313 /** 314 * scheduler_mc_timer_callback() - timer callback, gets called at time out 315 * @data: unsigned long, holds the timer object. 316 * 317 * Return: None 318 */ 319 void scheduler_mc_timer_callback(unsigned long data); 320 321 /** 322 * scheduler_get_queue_size() - Get the current size of the scheduler queue 323 * @qid: Queue ID for which the size is requested 324 * @size: Pointer to size where the size would be returned to the caller 325 * 326 * This API finds the size of the scheduler queue for the given Queue ID 327 * 328 * Return: QDF Status 329 */ 330 QDF_STATUS scheduler_get_queue_size(QDF_MODULE_ID qid, uint32_t *size); 331 #endif 332