sound/soc/intel/atom/sst/sst_ipc.c - linux - Git at Google

 // 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 <vinod.koul@intel.com>
  *		Harsha Priya <priya.harsha@intel.com>
  *		Dharageswari R <dharageswari.r@intel.com>
  *		KP Jeeja <jeeja.kp@intel.com>
  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 #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)
 {
 	struct sst_block *msg;

 	dev_dbg(ctx->dev, "Enter\n");
 	msg = kzalloc(sizeof(*msg), GFP_KERNEL);
 	if (!msg)
 		return NULL;
 	msg->condition = false;
 	msg->on = true;
 	msg->msg_id = msg_id;
 	msg->drv_id = drv_id;
 	spin_lock_bh(&ctx->block_lock);
 	list_add_tail(&msg->node, &ctx->block_list);
 	spin_unlock_bh(&ctx->block_lock);

 	return msg;
 }

 /*
  * 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)
 {
 	struct sst_block *block;

 	dev_dbg(ctx->dev, "Enter\n");

 	spin_lock_bh(&ctx->block_lock);
 	list_for_each_entry(block, &ctx->block_list, node) {
 		dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
 							block->drv_id);
 		if (block->msg_id == ipc && block->drv_id == drv_id) {
 			dev_dbg(ctx->dev, "free up the block\n");
 			block->ret_code = result;
 			block->data = data;
 			block->size = size;
 			block->condition = true;
 			spin_unlock_bh(&ctx->block_lock);
 			wake_up(&ctx->wait_queue);
 			return 0;
 		}
 	}
 	spin_unlock_bh(&ctx->block_lock);
 	dev_dbg(ctx->dev,
 		"Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
 		ipc, drv_id);
 	return -EINVAL;
 }

 int sst_free_block(struct intel_sst_drv *ctx, struct sst_block *freed)
 {
 	struct sst_block *block, *__block;

 	dev_dbg(ctx->dev, "Enter\n");
 	spin_lock_bh(&ctx->block_lock);
 	list_for_each_entry_safe(block, __block, &ctx->block_list, node) {
 		if (block == freed) {
 			pr_debug("pvt_id freed --> %d\n", freed->drv_id);
 			/* toggle the index position of pvt_id */
 			list_del(&freed->node);
 			spin_unlock_bh(&ctx->block_lock);
 			kfree(freed->data);
 			freed->data = NULL;
 			kfree(freed);
 			return 0;
 		}
 	}
 	spin_unlock_bh(&ctx->block_lock);
 	dev_err(ctx->dev, "block is already freed!!!\n");
 	return -EINVAL;
 }

 int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
 		struct ipc_post *ipc_msg, bool sync)
 {
 	struct ipc_post *msg = ipc_msg;
 	union ipc_header_mrfld header;
 	unsigned int loop_count = 0;
 	int retval = 0;
 	unsigned long irq_flags;

 	dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
 	spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 	header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
 	if (sync) {
 		while (header.p.header_high.part.busy) {
 			if (loop_count > 25) {
 				dev_err(sst_drv_ctx->dev,
 					"sst: Busy wait failed, can't send this msg\n");
 				retval = -EBUSY;
 				goto out;
 			}
 			cpu_relax();
 			loop_count++;
 			header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
 		}
 	} else {
 		if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) {
 			/* queue is empty, nothing to send */
 			spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 			dev_dbg(sst_drv_ctx->dev,
 					"Empty msg queue... NO Action\n");
 			return 0;
 		}

 		if (header.p.header_high.part.busy) {
 			spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 			dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n");
 			return 0;
 		}

 		/* copy msg from list */
 		msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next,
 				struct ipc_post, node);
 		list_del(&msg->node);
 	}
 	dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
 				msg->mrfld_header.p.header_high.full);
 	dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
 			msg->mrfld_header.p.header_low_payload);

 	if (msg->mrfld_header.p.header_high.part.large)
 		memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
 			msg->mailbox_data,
 			msg->mrfld_header.p.header_low_payload);

 	sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full);

 out:
 	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 	kfree(msg->mailbox_data);
 	kfree(msg);
 	return retval;
 }

 void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
 {
 	union interrupt_reg_mrfld isr;
 	union interrupt_reg_mrfld imr;
 	union ipc_header_mrfld clear_ipc;
 	unsigned long irq_flags;

 	spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 	imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX);
 	isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX);

 	/* write 1 to clear*/
 	isr.part.busy_interrupt = 1;
 	sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full);

 	/* Set IA done bit */
 	clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD);

 	clear_ipc.p.header_high.part.busy = 0;
 	clear_ipc.p.header_high.part.done = 1;
 	clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS;
 	sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full);
 	/* un mask busy interrupt */
 	imr.part.busy_interrupt = 0;
 	sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full);
 	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
 }


 /*
  * 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)
 {
 	struct ipc_header_fw_init *init =
 		(struct ipc_header_fw_init *)msg;
 	int retval = 0;

 	dev_dbg(sst_drv_ctx->dev, "*** FW Init msg came***\n");
 	if (init->result) {
 		sst_set_fw_state_locked(sst_drv_ctx, SST_RESET);
 		dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
 				init->result);
 		retval = init->result;
 		goto ret;
 	}
 	if (memcmp(&sst_drv_ctx->fw_version, &init->fw_version,
 		   sizeof(init->fw_version)))
 		dev_info(sst_drv_ctx->dev, "FW Version %02x.%02x.%02x.%02x\n",
 			init->fw_version.type, init->fw_version.major,
 			init->fw_version.minor, init->fw_version.build);
 	dev_dbg(sst_drv_ctx->dev, "Build date %s Time %s\n",
 			init->build_info.date, init->build_info.time);

 	/* Save FW version */
 	sst_drv_ctx->fw_version.type = init->fw_version.type;
 	sst_drv_ctx->fw_version.major = init->fw_version.major;
 	sst_drv_ctx->fw_version.minor = init->fw_version.minor;
 	sst_drv_ctx->fw_version.build = init->fw_version.build;

 ret:
 	sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0);
 }

 static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
 			struct ipc_post *msg)
 {
 	u32 msg_id;
 	int str_id;
 	u32 data_size, i;
 	void *data_offset;
 	struct stream_info *stream;
 	u32 msg_low, pipe_id;

 	msg_low = msg->mrfld_header.p.header_low_payload;
 	msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id;
 	data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr));
 	data_size =  msg_low - (sizeof(struct ipc_dsp_hdr));

 	switch (msg_id) {
 	case IPC_SST_PERIOD_ELAPSED_MRFLD:
 		pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
 		str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
 		if (str_id > 0) {
 			dev_dbg(sst_drv_ctx->dev,
 				"Period elapsed rcvd for pipe id 0x%x\n",
 				pipe_id);
 			stream = &sst_drv_ctx->streams[str_id];
 			/* If stream is dropped, skip processing this message*/
 			if (stream->status == STREAM_INIT)
 				break;
 			if (stream->period_elapsed)
 				stream->period_elapsed(stream->pcm_substream);
 			if (stream->compr_cb)
 				stream->compr_cb(stream->compr_cb_param);
 		}
 		break;

 	case IPC_IA_DRAIN_STREAM_MRFLD:
 		pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
 		str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
 		if (str_id > 0) {
 			stream = &sst_drv_ctx->streams[str_id];
 			if (stream->drain_notify)
 				stream->drain_notify(stream->drain_cb_param);
 		}
 		break;

 	case IPC_IA_FW_ASYNC_ERR_MRFLD:
 		dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n");
 		for (i = 0; i < (data_size/4); i++)
 			print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
 					16, 4, data_offset, data_size, false);
 		break;

 	case IPC_IA_FW_INIT_CMPLT_MRFLD:
 		process_fw_init(sst_drv_ctx, data_offset);
 		break;

 	case IPC_IA_BUF_UNDER_RUN_MRFLD:
 		pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
 		str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
 		if (str_id > 0)
 			dev_err(sst_drv_ctx->dev,
 				"Buffer under-run for pipe:%#x str_id:%d\n",
 				pipe_id, str_id);
 		break;

 	default:
 		dev_err(sst_drv_ctx->dev,
 			"Unrecognized async msg from FW msg_id %#x\n", msg_id);
 	}
 }

 void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
 		struct ipc_post *msg)
 {
 	unsigned int drv_id;
 	void *data;
 	union ipc_header_high msg_high;
 	u32 msg_low;
 	struct ipc_dsp_hdr *dsp_hdr;

 	msg_high = msg->mrfld_header.p.header_high;
 	msg_low = msg->mrfld_header.p.header_low_payload;

 	dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
 			msg->mrfld_header.p.header_high.full,
 			msg->mrfld_header.p.header_low_payload);

 	drv_id = msg_high.part.drv_id;

 	/* Check for async messages first */
 	if (drv_id == SST_ASYNC_DRV_ID) {
 		/*FW sent async large message*/
 		process_fw_async_msg(sst_drv_ctx, msg);
 		return;
 	}

 	/* FW sent short error response for an IPC */
 	if (msg_high.part.result && !msg_high.part.large) {
 		/* 32-bit FW error code in msg_low */
 		dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
 		sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
 			msg_high.part.drv_id,
 			msg_high.part.msg_id, NULL, 0);
 		return;
 	}

 	/*
 	 * Process all valid responses
 	 * if it is a large message, the payload contains the size to
 	 * copy from mailbox
 	 **/
 	if (msg_high.part.large) {
 		data = kmemdup((void *)msg->mailbox_data, msg_low, GFP_KERNEL);
 		if (!data)
 			return;
 		/* Copy command id so that we can use to put sst to reset */
 		dsp_hdr = (struct ipc_dsp_hdr *)data;
 		dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id);
 		if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
 				msg_high.part.drv_id,
 				msg_high.part.msg_id, data, msg_low))
 			kfree(data);
 	} else {
 		sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
 				msg_high.part.drv_id,
 				msg_high.part.msg_id, NULL, 0);
 	}

 }
	// 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 <vinod.koul@intel.com>
	* Harsha Priya <priya.harsha@intel.com>
	* Dharageswari R <dharageswari.r@intel.com>
	* KP Jeeja <jeeja.kp@intel.com>
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*/
	#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)
	{
	struct sst_block *msg;

	dev_dbg(ctx->dev, "Enter\n");
	msg = kzalloc(sizeof(*msg), GFP_KERNEL);
	if (!msg)
	return NULL;
	msg->condition = false;
	msg->on = true;
	msg->msg_id = msg_id;
	msg->drv_id = drv_id;
	spin_lock_bh(&ctx->block_lock);
	list_add_tail(&msg->node, &ctx->block_list);
	spin_unlock_bh(&ctx->block_lock);

	return msg;
	}

	/*
	* 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)
	{
	struct sst_block *block;

	dev_dbg(ctx->dev, "Enter\n");

	spin_lock_bh(&ctx->block_lock);
	list_for_each_entry(block, &ctx->block_list, node) {
	dev_dbg(ctx->dev, "Block ipc %d, drv_id %d\n", block->msg_id,
	block->drv_id);
	if (block->msg_id == ipc && block->drv_id == drv_id) {
	dev_dbg(ctx->dev, "free up the block\n");
	block->ret_code = result;
	block->data = data;
	block->size = size;
	block->condition = true;
	spin_unlock_bh(&ctx->block_lock);
	wake_up(&ctx->wait_queue);
	return 0;
	}
	}
	spin_unlock_bh(&ctx->block_lock);
	dev_dbg(ctx->dev,
	"Block not found or a response received for a short msg for ipc %d, drv_id %d\n",
	ipc, drv_id);
	return -EINVAL;
	}

	int sst_free_block(struct intel_sst_drv ctx, struct sst_block freed)
	{
	struct sst_block block, __block;

	dev_dbg(ctx->dev, "Enter\n");
	spin_lock_bh(&ctx->block_lock);
	list_for_each_entry_safe(block, __block, &ctx->block_list, node) {
	if (block == freed) {
	pr_debug("pvt_id freed --> %d\n", freed->drv_id);
	/* toggle the index position of pvt_id */
	list_del(&freed->node);
	spin_unlock_bh(&ctx->block_lock);
	kfree(freed->data);
	freed->data = NULL;
	kfree(freed);
	return 0;
	}
	}
	spin_unlock_bh(&ctx->block_lock);
	dev_err(ctx->dev, "block is already freed!!!\n");
	return -EINVAL;
	}

	int sst_post_message_mrfld(struct intel_sst_drv *sst_drv_ctx,
	struct ipc_post *ipc_msg, bool sync)
	{
	struct ipc_post *msg = ipc_msg;
	union ipc_header_mrfld header;
	unsigned int loop_count = 0;
	int retval = 0;
	unsigned long irq_flags;

	dev_dbg(sst_drv_ctx->dev, "Enter: sync: %d\n", sync);
	spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
	if (sync) {
	while (header.p.header_high.part.busy) {
	if (loop_count > 25) {
	dev_err(sst_drv_ctx->dev,
	"sst: Busy wait failed, can't send this msg\n");
	retval = -EBUSY;
	goto out;
	}
	cpu_relax();
	loop_count++;
	header.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCX);
	}
	} else {
	if (list_empty(&sst_drv_ctx->ipc_dispatch_list)) {
	/* queue is empty, nothing to send */
	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	dev_dbg(sst_drv_ctx->dev,
	"Empty msg queue... NO Action\n");
	return 0;
	}

	if (header.p.header_high.part.busy) {
	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	dev_dbg(sst_drv_ctx->dev, "Busy not free... post later\n");
	return 0;
	}

	/* copy msg from list */
	msg = list_entry(sst_drv_ctx->ipc_dispatch_list.next,
	struct ipc_post, node);
	list_del(&msg->node);
	}
	dev_dbg(sst_drv_ctx->dev, "sst: Post message: header = %x\n",
	msg->mrfld_header.p.header_high.full);
	dev_dbg(sst_drv_ctx->dev, "sst: size = 0x%x\n",
	msg->mrfld_header.p.header_low_payload);

	if (msg->mrfld_header.p.header_high.part.large)
	memcpy_toio(sst_drv_ctx->mailbox + SST_MAILBOX_SEND,
	msg->mailbox_data,
	msg->mrfld_header.p.header_low_payload);

	sst_shim_write64(sst_drv_ctx->shim, SST_IPCX, msg->mrfld_header.full);

	out:
	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	kfree(msg->mailbox_data);
	kfree(msg);
	return retval;
	}

	void intel_sst_clear_intr_mrfld(struct intel_sst_drv *sst_drv_ctx)
	{
	union interrupt_reg_mrfld isr;
	union interrupt_reg_mrfld imr;
	union ipc_header_mrfld clear_ipc;
	unsigned long irq_flags;

	spin_lock_irqsave(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	imr.full = sst_shim_read64(sst_drv_ctx->shim, SST_IMRX);
	isr.full = sst_shim_read64(sst_drv_ctx->shim, SST_ISRX);

	/* write 1 to clear*/
	isr.part.busy_interrupt = 1;
	sst_shim_write64(sst_drv_ctx->shim, SST_ISRX, isr.full);

	/* Set IA done bit */
	clear_ipc.full = sst_shim_read64(sst_drv_ctx->shim, SST_IPCD);

	clear_ipc.p.header_high.part.busy = 0;
	clear_ipc.p.header_high.part.done = 1;
	clear_ipc.p.header_low_payload = IPC_ACK_SUCCESS;
	sst_shim_write64(sst_drv_ctx->shim, SST_IPCD, clear_ipc.full);
	/* un mask busy interrupt */
	imr.part.busy_interrupt = 0;
	sst_shim_write64(sst_drv_ctx->shim, SST_IMRX, imr.full);
	spin_unlock_irqrestore(&sst_drv_ctx->ipc_spin_lock, irq_flags);
	}


	/*
	* 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)
	{
	struct ipc_header_fw_init *init =
	(struct ipc_header_fw_init *)msg;
	int retval = 0;

	dev_dbg(sst_drv_ctx->dev, "* FW Init msg came*\n");
	if (init->result) {
	sst_set_fw_state_locked(sst_drv_ctx, SST_RESET);
	dev_err(sst_drv_ctx->dev, "FW Init failed, Error %x\n",
	init->result);
	retval = init->result;
	goto ret;
	}
	if (memcmp(&sst_drv_ctx->fw_version, &init->fw_version,
	sizeof(init->fw_version)))
	dev_info(sst_drv_ctx->dev, "FW Version %02x.%02x.%02x.%02x\n",
	init->fw_version.type, init->fw_version.major,
	init->fw_version.minor, init->fw_version.build);
	dev_dbg(sst_drv_ctx->dev, "Build date %s Time %s\n",
	init->build_info.date, init->build_info.time);

	/* Save FW version */
	sst_drv_ctx->fw_version.type = init->fw_version.type;
	sst_drv_ctx->fw_version.major = init->fw_version.major;
	sst_drv_ctx->fw_version.minor = init->fw_version.minor;
	sst_drv_ctx->fw_version.build = init->fw_version.build;

	ret:
	sst_wake_up_block(sst_drv_ctx, retval, FW_DWNL_ID, 0 , NULL, 0);
	}

	static void process_fw_async_msg(struct intel_sst_drv *sst_drv_ctx,
	struct ipc_post *msg)
	{
	u32 msg_id;
	int str_id;
	u32 data_size, i;
	void *data_offset;
	struct stream_info *stream;
	u32 msg_low, pipe_id;

	msg_low = msg->mrfld_header.p.header_low_payload;
	msg_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->cmd_id;
	data_offset = (msg->mailbox_data + sizeof(struct ipc_dsp_hdr));
	data_size = msg_low - (sizeof(struct ipc_dsp_hdr));

	switch (msg_id) {
	case IPC_SST_PERIOD_ELAPSED_MRFLD:
	pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
	str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
	if (str_id > 0) {
	dev_dbg(sst_drv_ctx->dev,
	"Period elapsed rcvd for pipe id 0x%x\n",
	pipe_id);
	stream = &sst_drv_ctx->streams[str_id];
	/* If stream is dropped, skip processing this message*/
	if (stream->status == STREAM_INIT)
	break;
	if (stream->period_elapsed)
	stream->period_elapsed(stream->pcm_substream);
	if (stream->compr_cb)
	stream->compr_cb(stream->compr_cb_param);
	}
	break;

	case IPC_IA_DRAIN_STREAM_MRFLD:
	pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
	str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
	if (str_id > 0) {
	stream = &sst_drv_ctx->streams[str_id];
	if (stream->drain_notify)
	stream->drain_notify(stream->drain_cb_param);
	}
	break;

	case IPC_IA_FW_ASYNC_ERR_MRFLD:
	dev_err(sst_drv_ctx->dev, "FW sent async error msg:\n");
	for (i = 0; i < (data_size/4); i++)
	print_hex_dump(KERN_DEBUG, NULL, DUMP_PREFIX_NONE,
	16, 4, data_offset, data_size, false);
	break;

	case IPC_IA_FW_INIT_CMPLT_MRFLD:
	process_fw_init(sst_drv_ctx, data_offset);
	break;

	case IPC_IA_BUF_UNDER_RUN_MRFLD:
	pipe_id = ((struct ipc_dsp_hdr *)msg->mailbox_data)->pipe_id;
	str_id = get_stream_id_mrfld(sst_drv_ctx, pipe_id);
	if (str_id > 0)
	dev_err(sst_drv_ctx->dev,
	"Buffer under-run for pipe:%#x str_id:%d\n",
	pipe_id, str_id);
	break;

	default:
	dev_err(sst_drv_ctx->dev,
	"Unrecognized async msg from FW msg_id %#x\n", msg_id);
	}
	}

	void sst_process_reply_mrfld(struct intel_sst_drv *sst_drv_ctx,
	struct ipc_post *msg)
	{
	unsigned int drv_id;
	void *data;
	union ipc_header_high msg_high;
	u32 msg_low;
	struct ipc_dsp_hdr *dsp_hdr;

	msg_high = msg->mrfld_header.p.header_high;
	msg_low = msg->mrfld_header.p.header_low_payload;

	dev_dbg(sst_drv_ctx->dev, "IPC process message header %x payload %x\n",
	msg->mrfld_header.p.header_high.full,
	msg->mrfld_header.p.header_low_payload);

	drv_id = msg_high.part.drv_id;

	/* Check for async messages first */
	if (drv_id == SST_ASYNC_DRV_ID) {
	/FW sent async large message/
	process_fw_async_msg(sst_drv_ctx, msg);
	return;
	}

	/* FW sent short error response for an IPC */
	if (msg_high.part.result && !msg_high.part.large) {
	/* 32-bit FW error code in msg_low */
	dev_err(sst_drv_ctx->dev, "FW sent error response 0x%x", msg_low);
	sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
	msg_high.part.drv_id,
	msg_high.part.msg_id, NULL, 0);
	return;
	}

	/*
	* Process all valid responses
	* if it is a large message, the payload contains the size to
	* copy from mailbox
	**/
	if (msg_high.part.large) {
	data = kmemdup((void *)msg->mailbox_data, msg_low, GFP_KERNEL);
	if (!data)
	return;
	/* Copy command id so that we can use to put sst to reset */
	dsp_hdr = (struct ipc_dsp_hdr *)data;
	dev_dbg(sst_drv_ctx->dev, "cmd_id %d\n", dsp_hdr->cmd_id);
	if (sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
	msg_high.part.drv_id,
	msg_high.part.msg_id, data, msg_low))
	kfree(data);
	} else {
	sst_wake_up_block(sst_drv_ctx, msg_high.part.result,
	msg_high.part.drv_id,
	msg_high.part.msg_id, NULL, 0);
	}

	}