linux/sound/soc/intel/atom/sst/sst_ipc.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  sst_ipc.c - Intel SST Driver for audio engine
 *
 *  Copyright (C) 2008-14 Intel Corporation
 *  Authors:	Vinod Koul <[email protected]>
 *		Harsha Priya <[email protected]>
 *		Dharageswari R <[email protected]>
 *		KP Jeeja <[email protected]>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>

#include <asm/platform_sst_audio.h>

#include "../sst-mfld-platform.h"
#include "sst.h"

struct sst_block *sst_create_block(struct intel_sst_drv *ctx,
					u32 msg_id, u32 drv_id)
{ … }

/*
 * while handling the interrupts, we need to check for message status and
 * then if we are blocking for a message
 *
 * here we are unblocking the blocked ones, this is based on id we have
 * passed and search that for block threads.
 * We will not find block in two cases
 *  a) when its small message and block in not there, so silently ignore
 *  them
 *  b) when we are actually not able to find the block (bug perhaps)
 *
 *  Since we have bit of small messages we can spam kernel log with err
 *  print on above so need to keep as debug prints which should be enabled
 *  via dynamic debug while debugging IPC issues
 */
int sst_wake_up_block(struct intel_sst_drv *ctx, int result,
		u32 drv_id, u32 ipc, void *data, u32 size)
{ … }

int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed)
{ … }

int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
		struct ipc_post *ipc_msg, bool sync)
{ … }

void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
{ … }


/*
 * process_fw_init - process the FW init msg
 *
 * @msg: IPC message mailbox data from FW
 *
 * This function processes the FW init msg from FW
 * marks FW state and prints debug info of loaded FW
 */
static void process_fw_init(struct intel_sst_drv *sst_drv_ctx,
			void *msg)
{ … }

static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
			struct ipc_post *msg)
{ … }

void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
		struct ipc_post *msg)
{ … }