drivers/net/wwan/iosm/iosm_ipc_imem.h

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