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1 /* SPDX-License-Identifier: GPL-2.0-only
2  *
3  * Copyright (C) 2020-21 Intel Corporation.
4  */
5 
6 #ifndef IOSM_IPC_IMEM_H
7 #define IOSM_IPC_IMEM_H
8 
9 #include <linux/skbuff.h>
10 
11 #include "iosm_ipc_mmio.h"
12 #include "iosm_ipc_pcie.h"
13 #include "iosm_ipc_uevent.h"
14 #include "iosm_ipc_wwan.h"
15 #include "iosm_ipc_task_queue.h"
16 
17 struct ipc_chnl_cfg;
18 
19 /* IRQ moderation in usec */
20 #define IRQ_MOD_OFF 0
21 #define IRQ_MOD_NET 1000
22 #define IRQ_MOD_TRC 4000
23 
24 /* Either the PSI image is accepted by CP or the suspended flash tool is waken,
25  * informed that the CP ROM driver is not ready to process the PSI image.
26  * unit : milliseconds
27  */
28 #define IPC_PSI_TRANSFER_TIMEOUT 3000
29 
30 /* Timeout in 20 msec to wait for the modem to boot up to
31  * IPC_MEM_DEVICE_IPC_INIT state.
32  * unit : milliseconds (500 * ipc_util_msleep(20))
33  */
34 #define IPC_MODEM_BOOT_TIMEOUT 500
35 
36 /* Wait timeout for ipc status reflects IPC_MEM_DEVICE_IPC_UNINIT
37  * unit : milliseconds
38  */
39 #define IPC_MODEM_UNINIT_TIMEOUT_MS 30
40 
41 /* Pending time for processing data.
42  * unit : milliseconds
43  */
44 #define IPC_PEND_DATA_TIMEOUT 500
45 
46 /* The timeout in milliseconds for application to wait for remote time. */
47 #define IPC_REMOTE_TS_TIMEOUT_MS 10
48 
49 /* Timeout for TD allocation retry.
50  * unit : milliseconds
51  */
52 #define IPC_TD_ALLOC_TIMER_PERIOD_MS 100
53 
54 /* Host sleep target is host */
55 #define IPC_HOST_SLEEP_HOST 0
56 
57 /* Host sleep target is device */
58 #define IPC_HOST_SLEEP_DEVICE 1
59 
60 /* Sleep message, target host: AP enters sleep / target device: CP is
61  * allowed to enter sleep and shall use the host sleep protocol
62  */
63 #define IPC_HOST_SLEEP_ENTER_SLEEP 0
64 
65 /* Sleep_message, target host: AP exits  sleep / target device: CP is
66  * NOT allowed to enter sleep
67  */
68 #define IPC_HOST_SLEEP_EXIT_SLEEP 1
69 
70 #define IMEM_IRQ_DONT_CARE (-1)
71 
72 #define IPC_MEM_MAX_CHANNELS 8
73 
74 #define IPC_MEM_MUX_IP_SESSION_ENTRIES 8
75 
76 #define IPC_MEM_MUX_IP_CH_IF_ID 0
77 
78 #define TD_UPDATE_DEFAULT_TIMEOUT_USEC 1900
79 
80 #define FORCE_UPDATE_DEFAULT_TIMEOUT_USEC 500
81 
82 /* Sleep_message, target host: not applicable  / target device: CP is
83  * allowed to enter sleep and shall NOT use the device sleep protocol
84  */
85 #define IPC_HOST_SLEEP_ENTER_SLEEP_NO_PROTOCOL 2
86 
87 /* in_band_crash_signal IPC_MEM_INBAND_CRASH_SIG
88  * Modem crash notification configuration. If this value is non-zero then
89  * FEATURE_SET message will be sent to the Modem as a result the Modem will
90  * signal Crash via Execution Stage register. If this value is zero then Modem
91  * will use out-of-band method to notify about it's Crash.
92  */
93 #define IPC_MEM_INBAND_CRASH_SIG 1
94 
95 /* Extra headroom to be allocated for DL SKBs to allow addition of Ethernet
96  * header
97  */
98 #define IPC_MEM_DL_ETH_OFFSET 16
99 
100 #define IPC_CB(skb) ((struct ipc_skb_cb *)((skb)->cb))
101 #define IOSM_CHIP_INFO_SIZE_MAX 100
102 
103 #define FULLY_FUNCTIONAL 0
104 #define IOSM_DEVLINK_INIT 1
105 
106 /* List of the supported UL/DL pipes. */
107 enum ipc_mem_pipes {
108 	IPC_MEM_PIPE_0 = 0,
109 	IPC_MEM_PIPE_1,
110 	IPC_MEM_PIPE_2,
111 	IPC_MEM_PIPE_3,
112 	IPC_MEM_PIPE_4,
113 	IPC_MEM_PIPE_5,
114 	IPC_MEM_PIPE_6,
115 	IPC_MEM_PIPE_7,
116 	IPC_MEM_PIPE_8,
117 	IPC_MEM_PIPE_9,
118 	IPC_MEM_PIPE_10,
119 	IPC_MEM_PIPE_11,
120 	IPC_MEM_PIPE_12,
121 	IPC_MEM_PIPE_13,
122 	IPC_MEM_PIPE_14,
123 	IPC_MEM_PIPE_15,
124 	IPC_MEM_PIPE_16,
125 	IPC_MEM_PIPE_17,
126 	IPC_MEM_PIPE_18,
127 	IPC_MEM_PIPE_19,
128 	IPC_MEM_PIPE_20,
129 	IPC_MEM_PIPE_21,
130 	IPC_MEM_PIPE_22,
131 	IPC_MEM_PIPE_23,
132 	IPC_MEM_MAX_PIPES
133 };
134 
135 /* Enum defining channel states. */
136 enum ipc_channel_state {
137 	IMEM_CHANNEL_FREE,
138 	IMEM_CHANNEL_RESERVED,
139 	IMEM_CHANNEL_ACTIVE,
140 	IMEM_CHANNEL_CLOSING,
141 };
142 
143 /* Time Unit */
144 enum ipc_time_unit {
145 	IPC_SEC = 0,
146 	IPC_MILLI_SEC = 1,
147 	IPC_MICRO_SEC = 2,
148 	IPC_NANO_SEC = 3,
149 	IPC_PICO_SEC = 4,
150 	IPC_FEMTO_SEC = 5,
151 	IPC_ATTO_SEC = 6,
152 };
153 
154 /**
155  * enum ipc_ctype - Enum defining supported channel type needed for control
156  *		    /IP traffic.
157  * @IPC_CTYPE_WWAN:		Used for IP traffic
158  * @IPC_CTYPE_CTRL:		Used for Control Communication
159  */
160 enum ipc_ctype {
161 	IPC_CTYPE_WWAN,
162 	IPC_CTYPE_CTRL,
163 };
164 
165 /* Pipe direction. */
166 enum ipc_mem_pipe_dir {
167 	IPC_MEM_DIR_UL,
168 	IPC_MEM_DIR_DL,
169 };
170 
171 /* HP update identifier. To be used as data for ipc_cp_irq_hpda_update() */
172 enum ipc_hp_identifier {
173 	IPC_HP_MR = 0,
174 	IPC_HP_PM_TRIGGER,
175 	IPC_HP_WAKEUP_SPEC_TMR,
176 	IPC_HP_TD_UPD_TMR_START,
177 	IPC_HP_TD_UPD_TMR,
178 	IPC_HP_FAST_TD_UPD_TMR,
179 	IPC_HP_UL_WRITE_TD,
180 	IPC_HP_DL_PROCESS,
181 	IPC_HP_NET_CHANNEL_INIT,
182 	IPC_HP_CDEV_OPEN,
183 };
184 
185 /**
186  * struct ipc_pipe - Structure for Pipe.
187  * @tdr_start:			Ipc private protocol Transfer Descriptor Ring
188  * @channel:			Id of the sio device, set by imem_sio_open,
189  *				needed to pass DL char to the user terminal
190  * @skbr_start:			Circular buffer for skbuf and the buffer
191  *				reference in a tdr_start entry.
192  * @phy_tdr_start:		Transfer descriptor start address
193  * @old_head:			last head pointer reported to CP.
194  * @old_tail:			AP read position before CP moves the read
195  *				position to write/head. If CP has consumed the
196  *				buffers, AP has to freed the skbuf starting at
197  *				tdr_start[old_tail].
198  * @nr_of_entries:		Number of elements of skb_start and tdr_start.
199  * @max_nr_of_queued_entries:	Maximum number of queued entries in TDR
200  * @accumulation_backoff:	Accumulation in usec for accumulation
201  *				backoff (0 = no acc backoff)
202  * @irq_moderation:		timer in usec for irq_moderation
203  *				(0=no irq moderation)
204  * @pipe_nr:			Pipe identification number
205  * @irq:			Interrupt vector
206  * @dir:			Direction of data stream in pipe
207  * @td_tag:			Unique tag of the buffer queued
208  * @buf_size:			Buffer size (in bytes) for preallocated
209  *				buffers (for DL pipes)
210  * @nr_of_queued_entries:	Aueued number of entries
211  * @is_open:			Check for open pipe status
212  */
213 struct ipc_pipe {
214 	struct ipc_protocol_td *tdr_start;
215 	struct ipc_mem_channel *channel;
216 	struct sk_buff **skbr_start;
217 	dma_addr_t phy_tdr_start;
218 	u32 old_head;
219 	u32 old_tail;
220 	u32 nr_of_entries;
221 	u32 max_nr_of_queued_entries;
222 	u32 accumulation_backoff;
223 	u32 irq_moderation;
224 	u32 pipe_nr;
225 	u32 irq;
226 	enum ipc_mem_pipe_dir dir;
227 	u32 td_tag;
228 	u32 buf_size;
229 	u16 nr_of_queued_entries;
230 	u8 is_open:1;
231 };
232 
233 /**
234  * struct ipc_mem_channel - Structure for Channel.
235  * @channel_id:		Instance of the channel list and is return to the user
236  *			at the end of the open operation.
237  * @ctype:		Control or netif channel.
238  * @index:		unique index per ctype
239  * @ul_pipe:		pipe objects
240  * @dl_pipe:		pipe objects
241  * @if_id:		Interface ID
242  * @net_err_count:	Number of downlink errors returned by ipc_wwan_receive
243  *			interface at the entry point of the IP stack.
244  * @state:		Free, reserved or busy (in use).
245  * @ul_sem:		Needed for the blocking write or uplink transfer.
246  * @ul_list:		Uplink accumulator which is filled by the uplink
247  *			char app or IP stack. The socket buffer pointer are
248  *			added to the descriptor list in the kthread context.
249  */
250 struct ipc_mem_channel {
251 	int channel_id;
252 	enum ipc_ctype ctype;
253 	int index;
254 	struct ipc_pipe ul_pipe;
255 	struct ipc_pipe dl_pipe;
256 	int if_id;
257 	u32 net_err_count;
258 	enum ipc_channel_state state;
259 	struct completion ul_sem;
260 	struct sk_buff_head ul_list;
261 };
262 
263 /**
264  * enum ipc_phase - Different AP and CP phases.
265  *		    The enums defined after "IPC_P_ROM" and before
266  *		    "IPC_P_RUN" indicates the operating state where CP can
267  *		    respond to any requests. So while introducing new phase
268  *		    this shall be taken into consideration.
269  * @IPC_P_OFF:		On host PC, the PCIe device link settings are known
270  *			about the combined power on. PC is running, the driver
271  *			is loaded and CP is in power off mode. The PCIe bus
272  *			driver call the device power mode D3hot. In this phase
273  *			the driver the polls the device, until the device is in
274  *			the power on state and signals the power mode D0.
275  * @IPC_P_OFF_REQ:	The intermediate phase between cleanup activity starts
276  *			and ends.
277  * @IPC_P_CRASH:	The phase indicating CP crash
278  * @IPC_P_CD_READY:	The phase indicating CP core dump is ready
279  * @IPC_P_ROM:		After power on, CP starts in ROM mode and the IPC ROM
280  *			driver is waiting 150 ms for the AP active notification
281  *			saved in the PCI link status register.
282  * @IPC_P_PSI:		Primary signed image download phase
283  * @IPC_P_EBL:		Extended bootloader pahse
284  * @IPC_P_RUN:		The phase after flashing to RAM is the RUNTIME phase.
285  */
286 enum ipc_phase {
287 	IPC_P_OFF,
288 	IPC_P_OFF_REQ,
289 	IPC_P_CRASH,
290 	IPC_P_CD_READY,
291 	IPC_P_ROM,
292 	IPC_P_PSI,
293 	IPC_P_EBL,
294 	IPC_P_RUN,
295 };
296 
297 /**
298  * struct iosm_imem - Current state of the IPC shared memory.
299  * @mmio:			mmio instance to access CP MMIO area /
300  *				doorbell scratchpad.
301  * @ipc_protocol:		IPC Protocol instance
302  * @ipc_task:			Task for entry into ipc task queue
303  * @wwan:			WWAN device pointer
304  * @mux:			IP Data multiplexing state.
305  * @sio:			IPC SIO data structure pointer
306  * @ipc_port:			IPC PORT data structure pointer
307  * @pcie:			IPC PCIe
308  * @trace:			IPC trace data structure pointer
309  * @dev:			Pointer to device structure
310  * @ipc_requested_state:	Expected IPC state on CP.
311  * @channels:			Channel list with UL/DL pipe pairs.
312  * @ipc_devlink:		IPC Devlink data structure pointer
313  * @ipc_status:			local ipc_status
314  * @nr_of_channels:		number of configured channels
315  * @startup_timer:		startup timer for NAND support.
316  * @hrtimer_period:		Hr timer period
317  * @tdupdate_timer:		Delay the TD update doorbell.
318  * @fast_update_timer:		forced head pointer update delay timer.
319  * @td_alloc_timer:		Timer for DL pipe TD allocation retry
320  * @adb_timer:			Timer for finishing the ADB.
321  * @rom_exit_code:		Mapped boot rom exit code.
322  * @enter_runtime:		1 means the transition to runtime phase was
323  *				executed.
324  * @ul_pend_sem:		Semaphore to wait/complete of UL TDs
325  *				before closing pipe.
326  * @app_notify_ul_pend:		Signal app if UL TD is pending
327  * @dl_pend_sem:		Semaphore to wait/complete of DL TDs
328  *				before closing pipe.
329  * @app_notify_dl_pend:		Signal app if DL TD is pending
330  * @phase:			Operating phase like runtime.
331  * @pci_device_id:		Device ID
332  * @cp_version:			CP version
333  * @device_sleep:		Device sleep state
334  * @run_state_worker:		Pointer to worker component for device
335  *				setup operations to be called when modem
336  *				reaches RUN state
337  * @ev_irq_pending:		0 means inform the IPC tasklet to
338  *				process the irq actions.
339  * @flag:			Flag to monitor the state of driver
340  * @td_update_timer_suspended:	if true then td update timer suspend
341  * @ev_mux_net_transmit_pending:0 means inform the IPC tasklet to pass
342  * @reset_det_n:		Reset detect flag
343  * @pcie_wake_n:		Pcie wake flag
344  * @debugfs_wwan_dir:		WWAN Debug FS directory entry
345  * @debugfs_dir:		Debug FS directory for driver-specific entries
346  */
347 struct iosm_imem {
348 	struct iosm_mmio *mmio;
349 	struct iosm_protocol *ipc_protocol;
350 	struct ipc_task *ipc_task;
351 	struct iosm_wwan *wwan;
352 	struct iosm_mux *mux;
353 	struct iosm_cdev *ipc_port[IPC_MEM_MAX_CHANNELS];
354 	struct iosm_pcie *pcie;
355 #ifdef CONFIG_WWAN_DEBUGFS
356 	struct iosm_trace *trace;
357 #endif
358 	struct device *dev;
359 	enum ipc_mem_device_ipc_state ipc_requested_state;
360 	struct ipc_mem_channel channels[IPC_MEM_MAX_CHANNELS];
361 	struct iosm_devlink *ipc_devlink;
362 	u32 ipc_status;
363 	u32 nr_of_channels;
364 	struct hrtimer startup_timer;
365 	ktime_t hrtimer_period;
366 	struct hrtimer tdupdate_timer;
367 	struct hrtimer fast_update_timer;
368 	struct hrtimer td_alloc_timer;
369 	struct hrtimer adb_timer;
370 	enum rom_exit_code rom_exit_code;
371 	u32 enter_runtime;
372 	struct completion ul_pend_sem;
373 	u32 app_notify_ul_pend;
374 	struct completion dl_pend_sem;
375 	u32 app_notify_dl_pend;
376 	enum ipc_phase phase;
377 	u16 pci_device_id;
378 	int cp_version;
379 	int device_sleep;
380 	struct work_struct run_state_worker;
381 	u8 ev_irq_pending[IPC_IRQ_VECTORS];
382 	unsigned long flag;
383 	u8 td_update_timer_suspended:1,
384 	   ev_mux_net_transmit_pending:1,
385 	   reset_det_n:1,
386 	   pcie_wake_n:1;
387 #ifdef CONFIG_WWAN_DEBUGFS
388 	struct dentry *debugfs_wwan_dir;
389 	struct dentry *debugfs_dir;
390 #endif
391 };
392 
393 /**
394  * ipc_imem_init - Initialize the shared memory region
395  * @pcie:	Pointer to core driver data-struct
396  * @device_id:	PCI device ID
397  * @mmio:	Pointer to the mmio area
398  * @dev:	Pointer to device structure
399  *
400  * Returns:  Initialized imem pointer on success else NULL
401  */
402 struct iosm_imem *ipc_imem_init(struct iosm_pcie *pcie, unsigned int device_id,
403 				void __iomem *mmio, struct device *dev);
404 
405 /**
406  * ipc_imem_pm_s2idle_sleep - Set PM variables to sleep/active for
407  *			      s2idle sleep/active
408  * @ipc_imem:	Pointer to imem data-struct
409  * @sleep:	Set PM Variable to sleep/active
410  */
411 void ipc_imem_pm_s2idle_sleep(struct iosm_imem *ipc_imem, bool sleep);
412 
413 /**
414  * ipc_imem_pm_suspend - The HAL shall ask the shared memory layer
415  *			 whether D3 is allowed.
416  * @ipc_imem:	Pointer to imem data-struct
417  */
418 void ipc_imem_pm_suspend(struct iosm_imem *ipc_imem);
419 
420 /**
421  * ipc_imem_pm_resume - The HAL shall inform the shared memory layer
422  *			that the device is active.
423  * @ipc_imem:	Pointer to imem data-struct
424  */
425 void ipc_imem_pm_resume(struct iosm_imem *ipc_imem);
426 
427 /**
428  * ipc_imem_cleanup -	Inform CP and free the shared memory resources.
429  * @ipc_imem:	Pointer to imem data-struct
430  */
431 void ipc_imem_cleanup(struct iosm_imem *ipc_imem);
432 
433 /**
434  * ipc_imem_irq_process - Shift the IRQ actions to the IPC thread.
435  * @ipc_imem:	Pointer to imem data-struct
436  * @irq:	Irq number
437  */
438 void ipc_imem_irq_process(struct iosm_imem *ipc_imem, int irq);
439 
440 /**
441  * imem_get_device_sleep_state - Get the device sleep state value.
442  * @ipc_imem:	Pointer to imem instance
443  *
444  * Returns: device sleep state
445  */
446 int imem_get_device_sleep_state(struct iosm_imem *ipc_imem);
447 
448 /**
449  * ipc_imem_td_update_timer_suspend - Updates the TD Update Timer suspend flag.
450  * @ipc_imem:	Pointer to imem data-struct
451  * @suspend:	Flag to update. If TRUE then HP update doorbell is triggered to
452  *		device without any wait. If FALSE then HP update doorbell is
453  *		delayed until timeout.
454  */
455 void ipc_imem_td_update_timer_suspend(struct iosm_imem *ipc_imem, bool suspend);
456 
457 /**
458  * ipc_imem_channel_close - Release the channel resources.
459  * @ipc_imem:		Pointer to imem data-struct
460  * @channel_id:		Channel ID to be cleaned up.
461  */
462 void ipc_imem_channel_close(struct iosm_imem *ipc_imem, int channel_id);
463 
464 /**
465  * ipc_imem_channel_alloc - Reserves a channel
466  * @ipc_imem:	Pointer to imem data-struct
467  * @index:	ID to lookup from the preallocated list.
468  * @ctype:	Channel type.
469  *
470  * Returns: Index on success and failure value on error
471  */
472 int ipc_imem_channel_alloc(struct iosm_imem *ipc_imem, int index,
473 			   enum ipc_ctype ctype);
474 
475 /**
476  * ipc_imem_channel_open - Establish the pipes.
477  * @ipc_imem:		Pointer to imem data-struct
478  * @channel_id:		Channel ID returned during alloc.
479  * @db_id:		Doorbell ID for trigger identifier.
480  *
481  * Returns: Pointer of ipc_mem_channel on success and NULL on failure.
482  */
483 struct ipc_mem_channel *ipc_imem_channel_open(struct iosm_imem *ipc_imem,
484 					      int channel_id, u32 db_id);
485 
486 /**
487  * ipc_imem_td_update_timer_start - Starts the TD Update Timer if not running.
488  * @ipc_imem:	Pointer to imem data-struct
489  */
490 void ipc_imem_td_update_timer_start(struct iosm_imem *ipc_imem);
491 
492 /**
493  * ipc_imem_ul_write_td - Pass the channel UL list to protocol layer for TD
494  *		      preparation and sending them to the device.
495  * @ipc_imem:	Pointer to imem data-struct
496  *
497  * Returns: TRUE of HP Doorbell trigger is pending. FALSE otherwise.
498  */
499 bool ipc_imem_ul_write_td(struct iosm_imem *ipc_imem);
500 
501 /**
502  * ipc_imem_ul_send - Dequeue SKB from channel list and start with
503  *		  the uplink transfer.If HP Doorbell is pending to be
504  *		  triggered then starts the TD Update Timer.
505  * @ipc_imem:	Pointer to imem data-struct
506  */
507 void ipc_imem_ul_send(struct iosm_imem *ipc_imem);
508 
509 /**
510  * ipc_imem_channel_update - Set or modify pipe config of an existing channel
511  * @ipc_imem:		Pointer to imem data-struct
512  * @id:			Channel config index
513  * @chnl_cfg:		Channel config struct
514  * @irq_moderation:	Timer in usec for irq_moderation
515  */
516 void ipc_imem_channel_update(struct iosm_imem *ipc_imem, int id,
517 			     struct ipc_chnl_cfg chnl_cfg, u32 irq_moderation);
518 
519 /**
520  * ipc_imem_channel_free -Free an IPC channel.
521  * @channel:	Channel to be freed
522  */
523 void ipc_imem_channel_free(struct ipc_mem_channel *channel);
524 
525 /**
526  * ipc_imem_hrtimer_stop - Stop the hrtimer
527  * @hr_timer:	Pointer to hrtimer instance
528  */
529 void ipc_imem_hrtimer_stop(struct hrtimer *hr_timer);
530 
531 /**
532  * ipc_imem_pipe_cleanup - Reset volatile pipe content for all channels
533  * @ipc_imem:	Pointer to imem data-struct
534  * @pipe:	Pipe to cleaned up
535  */
536 void ipc_imem_pipe_cleanup(struct iosm_imem *ipc_imem, struct ipc_pipe *pipe);
537 
538 /**
539  * ipc_imem_pipe_close - Send msg to device to close pipe
540  * @ipc_imem:	Pointer to imem data-struct
541  * @pipe:	Pipe to be closed
542  */
543 void ipc_imem_pipe_close(struct iosm_imem *ipc_imem, struct ipc_pipe *pipe);
544 
545 /**
546  * ipc_imem_phase_update - Get the CP execution state
547  *			  and map it to the AP phase.
548  * @ipc_imem:	Pointer to imem data-struct
549  *
550  * Returns: Current ap updated phase
551  */
552 enum ipc_phase ipc_imem_phase_update(struct iosm_imem *ipc_imem);
553 
554 /**
555  * ipc_imem_phase_get_string - Return the current operation
556  *			     phase as string.
557  * @phase:	AP phase
558  *
559  * Returns: AP phase string
560  */
561 const char *ipc_imem_phase_get_string(enum ipc_phase phase);
562 
563 /**
564  * ipc_imem_msg_send_feature_set - Send feature set message to modem
565  * @ipc_imem:		Pointer to imem data-struct
566  * @reset_enable:	0 = out-of-band, 1 = in-band-crash notification
567  * @atomic_ctx:		if disabled call in tasklet context
568  *
569  */
570 void ipc_imem_msg_send_feature_set(struct iosm_imem *ipc_imem,
571 				   unsigned int reset_enable, bool atomic_ctx);
572 
573 /**
574  * ipc_imem_ipc_init_check - Send the init event to CP, wait a certain time and
575  *			     set CP to runtime with the context information
576  * @ipc_imem:	Pointer to imem data-struct
577  */
578 void ipc_imem_ipc_init_check(struct iosm_imem *ipc_imem);
579 
580 /**
581  * ipc_imem_channel_init - Initialize the channel list with UL/DL pipe pairs.
582  * @ipc_imem:		Pointer to imem data-struct
583  * @ctype:		Channel type
584  * @chnl_cfg:		Channel configuration struct
585  * @irq_moderation:	Timer in usec for irq_moderation
586  */
587 void ipc_imem_channel_init(struct iosm_imem *ipc_imem, enum ipc_ctype ctype,
588 			   struct ipc_chnl_cfg chnl_cfg, u32 irq_moderation);
589 
590 /**
591  * ipc_imem_devlink_trigger_chip_info - Inform devlink that the chip
592  *					information are available if the
593  *					flashing to RAM interworking shall be
594  *					executed.
595  * @ipc_imem:	Pointer to imem structure
596  *
597  * Returns: 0 on success, -1 on failure
598  */
599 int ipc_imem_devlink_trigger_chip_info(struct iosm_imem *ipc_imem);
600 
601 void ipc_imem_adb_timer_start(struct iosm_imem *ipc_imem);
602 
603 #endif
604