sound/soc/sof/amd/acp-ipc.c - linux - Git at Google

 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 //
 // This file is provided under a dual BSD/GPLv2 license. When using or
 // redistributing this file, you may do so under either license.
 //
 // Copyright(c) 2021, 2023 Advanced Micro Devices, Inc.
 //
 // Authors: Balakishore Pati <Balakishore.pati@amd.com>
 //	    Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>

 /* ACP-specific SOF IPC code */

 #include <linux/module.h>
 #include "../ops.h"
 #include "acp.h"
 #include "acp-dsp-offset.h"

 void acp_mailbox_write(struct snd_sof_dev *sdev, u32 offset, void *message, size_t bytes)
 {
 	memcpy_to_scratch(sdev, offset, message, bytes);
 }
 EXPORT_SYMBOL_NS(acp_mailbox_write, "SND_SOC_SOF_AMD_COMMON");

 void acp_mailbox_read(struct snd_sof_dev *sdev, u32 offset, void *message, size_t bytes)
 {
 	memcpy_from_scratch(sdev, offset, message, bytes);
 }
 EXPORT_SYMBOL_NS(acp_mailbox_read, "SND_SOC_SOF_AMD_COMMON");

 static void acpbus_trigger_host_to_dsp_swintr(struct acp_dev_data *adata)
 {
 	struct snd_sof_dev *sdev = adata->dev;
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	u32 swintr_trigger;

 	swintr_trigger = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->dsp_intr_base +
 						DSP_SW_INTR_TRIG_OFFSET);
 	swintr_trigger |= 0x01;
 	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->dsp_intr_base + DSP_SW_INTR_TRIG_OFFSET,
 			  swintr_trigger);
 }

 static void acp_ipc_host_msg_set(struct snd_sof_dev *sdev)
 {
 	unsigned int host_msg = sdev->debug_box.offset +
 				offsetof(struct scratch_ipc_conf, sof_host_msg_write);

 	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + host_msg, 1);
 }

 static void acp_dsp_ipc_host_done(struct snd_sof_dev *sdev)
 {
 	unsigned int dsp_msg = sdev->debug_box.offset +
 			       offsetof(struct scratch_ipc_conf, sof_dsp_msg_write);

 	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_msg, 0);
 }

 static void acp_dsp_ipc_dsp_done(struct snd_sof_dev *sdev)
 {
 	unsigned int dsp_ack = sdev->debug_box.offset +
 			       offsetof(struct scratch_ipc_conf, sof_dsp_ack_write);

 	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_ack, 0);
 }

 int acp_sof_ipc_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
 {
 	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	unsigned int offset = sdev->host_box.offset;
 	unsigned int count = ACP_HW_SEM_RETRY_COUNT;

 	while (snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset)) {
 		/* Wait until acquired HW Semaphore Lock or timeout*/
 		count--;
 		if (!count) {
 			dev_err(sdev->dev, "%s: Failed to acquire HW lock\n", __func__);
 			return -EINVAL;
 		}
 	}

 	acp_mailbox_write(sdev, offset, msg->msg_data, msg->msg_size);
 	acp_ipc_host_msg_set(sdev);

 	/* Trigger host to dsp interrupt for the msg */
 	acpbus_trigger_host_to_dsp_swintr(adata);

 	/* Unlock or Release HW Semaphore */
 	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset, 0x0);

 	return 0;
 }
 EXPORT_SYMBOL_NS(acp_sof_ipc_send_msg, "SND_SOC_SOF_AMD_COMMON");

 static void acp_dsp_ipc_get_reply(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_ipc_msg *msg = sdev->msg;
 	struct sof_ipc_reply reply;
 	struct sof_ipc_cmd_hdr *hdr;
 	unsigned int offset = sdev->host_box.offset;
 	int ret = 0;

        /*
 	* Sometimes, there is unexpected reply ipc arriving. The reply
 	* ipc belongs to none of the ipcs sent from driver.
 	* In this case, the driver must ignore the ipc.
 	*/
 	if (!msg) {
 		dev_warn(sdev->dev, "unexpected ipc interrupt raised!\n");
 		return;
 	}
 	hdr = msg->msg_data;
 	if (hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_CTX_SAVE) ||
 	    hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_GATE)) {
 		/*
 		 * memory windows are powered off before sending IPC reply,
 		 * so we can't read the mailbox for CTX_SAVE and PM_GATE
 		 * replies.
 		 */
 		reply.error = 0;
 		reply.hdr.cmd = SOF_IPC_GLB_REPLY;
 		reply.hdr.size = sizeof(reply);
 		memcpy(msg->reply_data, &reply, sizeof(reply));
 		goto out;
 	}
 	/* get IPC reply from DSP in the mailbox */
 	acp_mailbox_read(sdev, offset, &reply, sizeof(reply));
 	if (reply.error < 0) {
 		memcpy(msg->reply_data, &reply, sizeof(reply));
 		ret = reply.error;
 	} else {
 		/*
 		 * To support an IPC tx_message with a
 		 * reply_size set to zero.
 		 */
 		if (!msg->reply_size)
 			goto out;

 		/* reply correct size ? */
 		if (reply.hdr.size != msg->reply_size &&
 		    !(reply.hdr.cmd & SOF_IPC_GLB_PROBE)) {
 			dev_err(sdev->dev, "reply expected %zu got %u bytes\n",
 				msg->reply_size, reply.hdr.size);
 			ret = -EINVAL;
 		}
 		/* read the message */
 		if (msg->reply_size > 0)
 			acp_mailbox_read(sdev, offset, msg->reply_data, msg->reply_size);
 	}
 out:
 	msg->reply_error = ret;
 }

 irqreturn_t acp_sof_ipc_irq_thread(int irq, void *context)
 {
 	struct snd_sof_dev *sdev = context;
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
 	unsigned int dsp_msg_write = sdev->debug_box.offset +
 				     offsetof(struct scratch_ipc_conf, sof_dsp_msg_write);
 	unsigned int dsp_ack_write = sdev->debug_box.offset +
 				     offsetof(struct scratch_ipc_conf, sof_dsp_ack_write);
 	bool ipc_irq = false;
 	int dsp_msg, dsp_ack;
 	unsigned int status;

 	if (sdev->first_boot && sdev->fw_state != SOF_FW_BOOT_COMPLETE) {
 		acp_mailbox_read(sdev, sdev->dsp_box.offset, &status, sizeof(status));
 		if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
 			snd_sof_dsp_panic(sdev, sdev->dsp_box.offset + sizeof(status),
 					  true);
 			status = 0;
 			acp_mailbox_write(sdev, sdev->dsp_box.offset, &status, sizeof(status));
 			return IRQ_HANDLED;
 		}
 		snd_sof_ipc_msgs_rx(sdev);
 		acp_dsp_ipc_host_done(sdev);
 		return IRQ_HANDLED;
 	}

 	dsp_msg = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_msg_write);
 	if (dsp_msg) {
 		snd_sof_ipc_msgs_rx(sdev);
 		acp_dsp_ipc_host_done(sdev);
 		ipc_irq = true;
 	}

 	dsp_ack = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_ack_write);
 	if (dsp_ack) {
 		spin_lock_irq(&sdev->ipc_lock);
 		/* handle immediate reply from DSP core */
 		acp_dsp_ipc_get_reply(sdev);
 		snd_sof_ipc_reply(sdev, 0);
 		/* set the done bit */
 		acp_dsp_ipc_dsp_done(sdev);
 		spin_unlock_irq(&sdev->ipc_lock);
 		ipc_irq = true;
 	}

 	acp_mailbox_read(sdev, sdev->debug_box.offset, &status, sizeof(u32));
 	if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
 		snd_sof_dsp_panic(sdev, sdev->dsp_oops_offset, true);
 		status = 0;
 		acp_mailbox_write(sdev, sdev->debug_box.offset, &status, sizeof(status));
 		return IRQ_HANDLED;
 	}

 	if (desc->probe_reg_offset) {
 		u32 val;
 		u32 posn;

 		/* Probe register consists of two parts
 		 * (0-30) bit has cumulative position value
 		 * 31 bit is a synchronization flag between DSP and CPU
 		 * for the position update
 		 */
 		val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->probe_reg_offset);
 		if (val & PROBE_STATUS_BIT) {
 			posn = val & ~PROBE_STATUS_BIT;
 			if (adata->probe_stream) {
 				/* Probe related posn value is of 31 bits limited to 2GB
 				 * once wrapped DSP won't send posn interrupt.
 				 */
 				adata->probe_stream->cstream_posn = posn;
 				snd_compr_fragment_elapsed(adata->probe_stream->cstream);
 				snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->probe_reg_offset, posn);
 				ipc_irq = true;
 			}
 		}
 	}

 	if (!ipc_irq)
 		dev_dbg_ratelimited(sdev->dev, "nothing to do in IPC IRQ thread\n");

 	return IRQ_HANDLED;
 }
 EXPORT_SYMBOL_NS(acp_sof_ipc_irq_thread, "SND_SOC_SOF_AMD_COMMON");

 int acp_sof_ipc_msg_data(struct snd_sof_dev *sdev, struct snd_sof_pcm_stream *sps,
 			 void *p, size_t sz)
 {
 	unsigned int offset = sdev->dsp_box.offset;

 	if (!sps || !sdev->stream_box.size) {
 		acp_mailbox_read(sdev, offset, p, sz);
 	} else {
 		struct snd_pcm_substream *substream = sps->substream;
 		struct acp_dsp_stream *stream;

 		if (!substream || !substream->runtime)
 			return -ESTRPIPE;

 		stream = substream->runtime->private_data;

 		if (!stream)
 			return -ESTRPIPE;

 		acp_mailbox_read(sdev, stream->posn_offset, p, sz);
 	}

 	return 0;
 }
 EXPORT_SYMBOL_NS(acp_sof_ipc_msg_data, "SND_SOC_SOF_AMD_COMMON");

 int acp_set_stream_data_offset(struct snd_sof_dev *sdev,
 			       struct snd_sof_pcm_stream *sps,
 			       size_t posn_offset)
 {
 	struct snd_pcm_substream *substream = sps->substream;
 	struct acp_dsp_stream *stream = substream->runtime->private_data;

 	/* check for unaligned offset or overflow */
 	if (posn_offset > sdev->stream_box.size ||
 	    posn_offset % sizeof(struct sof_ipc_stream_posn) != 0)
 		return -EINVAL;

 	stream->posn_offset = sdev->stream_box.offset + posn_offset;

 	dev_dbg(sdev->dev, "pcm: stream dir %d, posn mailbox offset is %zu",
 		substream->stream, stream->posn_offset);

 	return 0;
 }
 EXPORT_SYMBOL_NS(acp_set_stream_data_offset, "SND_SOC_SOF_AMD_COMMON");

 int acp_sof_ipc_get_mailbox_offset(struct snd_sof_dev *sdev)
 {
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);

 	return desc->sram_pte_offset;
 }
 EXPORT_SYMBOL_NS(acp_sof_ipc_get_mailbox_offset, "SND_SOC_SOF_AMD_COMMON");

 int acp_sof_ipc_get_window_offset(struct snd_sof_dev *sdev, u32 id)
 {
 	return 0;
 }
 EXPORT_SYMBOL_NS(acp_sof_ipc_get_window_offset, "SND_SOC_SOF_AMD_COMMON");

 MODULE_DESCRIPTION("AMD ACP sof-ipc driver");
	// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
	//
	// This file is provided under a dual BSD/GPLv2 license. When using or
	// redistributing this file, you may do so under either license.
	//
	// Copyright(c) 2021, 2023 Advanced Micro Devices, Inc.
	//
	// Authors: Balakishore Pati <Balakishore.pati@amd.com>
	// Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>

	/* ACP-specific SOF IPC code */

	#include <linux/module.h>
	#include "../ops.h"
	#include "acp.h"
	#include "acp-dsp-offset.h"

	void acp_mailbox_write(struct snd_sof_dev sdev, u32 offset, void message, size_t bytes)
	{
	memcpy_to_scratch(sdev, offset, message, bytes);
	}
	EXPORT_SYMBOL_NS(acp_mailbox_write, "SND_SOC_SOF_AMD_COMMON");

	void acp_mailbox_read(struct snd_sof_dev sdev, u32 offset, void message, size_t bytes)
	{
	memcpy_from_scratch(sdev, offset, message, bytes);
	}
	EXPORT_SYMBOL_NS(acp_mailbox_read, "SND_SOC_SOF_AMD_COMMON");

	static void acpbus_trigger_host_to_dsp_swintr(struct acp_dev_data *adata)
	{
	struct snd_sof_dev *sdev = adata->dev;
	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
	u32 swintr_trigger;

	swintr_trigger = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->dsp_intr_base +
	DSP_SW_INTR_TRIG_OFFSET);
	swintr_trigger \|= 0x01;
	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->dsp_intr_base + DSP_SW_INTR_TRIG_OFFSET,
	swintr_trigger);
	}

	static void acp_ipc_host_msg_set(struct snd_sof_dev *sdev)
	{
	unsigned int host_msg = sdev->debug_box.offset +
	offsetof(struct scratch_ipc_conf, sof_host_msg_write);

	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + host_msg, 1);
	}

	static void acp_dsp_ipc_host_done(struct snd_sof_dev *sdev)
	{
	unsigned int dsp_msg = sdev->debug_box.offset +
	offsetof(struct scratch_ipc_conf, sof_dsp_msg_write);

	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_msg, 0);
	}

	static void acp_dsp_ipc_dsp_done(struct snd_sof_dev *sdev)
	{
	unsigned int dsp_ack = sdev->debug_box.offset +
	offsetof(struct scratch_ipc_conf, sof_dsp_ack_write);

	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_ack, 0);
	}

	int acp_sof_ipc_send_msg(struct snd_sof_dev sdev, struct snd_sof_ipc_msg msg)
	{
	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
	unsigned int offset = sdev->host_box.offset;
	unsigned int count = ACP_HW_SEM_RETRY_COUNT;

	while (snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset)) {
	/* Wait until acquired HW Semaphore Lock or timeout*/
	count--;
	if (!count) {
	dev_err(sdev->dev, "%s: Failed to acquire HW lock\n", __func__);
	return -EINVAL;
	}
	}

	acp_mailbox_write(sdev, offset, msg->msg_data, msg->msg_size);
	acp_ipc_host_msg_set(sdev);

	/* Trigger host to dsp interrupt for the msg */
	acpbus_trigger_host_to_dsp_swintr(adata);

	/* Unlock or Release HW Semaphore */
	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset, 0x0);

	return 0;
	}
	EXPORT_SYMBOL_NS(acp_sof_ipc_send_msg, "SND_SOC_SOF_AMD_COMMON");

	static void acp_dsp_ipc_get_reply(struct snd_sof_dev *sdev)
	{
	struct snd_sof_ipc_msg *msg = sdev->msg;
	struct sof_ipc_reply reply;
	struct sof_ipc_cmd_hdr *hdr;
	unsigned int offset = sdev->host_box.offset;
	int ret = 0;

	/*
	* Sometimes, there is unexpected reply ipc arriving. The reply
	* ipc belongs to none of the ipcs sent from driver.
	* In this case, the driver must ignore the ipc.
	*/
	if (!msg) {
	dev_warn(sdev->dev, "unexpected ipc interrupt raised!\n");
	return;
	}
	hdr = msg->msg_data;
	if (hdr->cmd == (SOF_IPC_GLB_PM_MSG \| SOF_IPC_PM_CTX_SAVE) \|\|
	hdr->cmd == (SOF_IPC_GLB_PM_MSG \| SOF_IPC_PM_GATE)) {
	/*
	* memory windows are powered off before sending IPC reply,
	* so we can't read the mailbox for CTX_SAVE and PM_GATE
	* replies.
	*/
	reply.error = 0;
	reply.hdr.cmd = SOF_IPC_GLB_REPLY;
	reply.hdr.size = sizeof(reply);
	memcpy(msg->reply_data, &reply, sizeof(reply));
	goto out;
	}
	/* get IPC reply from DSP in the mailbox */
	acp_mailbox_read(sdev, offset, &reply, sizeof(reply));
	if (reply.error < 0) {
	memcpy(msg->reply_data, &reply, sizeof(reply));
	ret = reply.error;
	} else {
	/*
	* To support an IPC tx_message with a
	* reply_size set to zero.
	*/
	if (!msg->reply_size)
	goto out;

	/* reply correct size ? */
	if (reply.hdr.size != msg->reply_size &&
	!(reply.hdr.cmd & SOF_IPC_GLB_PROBE)) {
	dev_err(sdev->dev, "reply expected %zu got %u bytes\n",
	msg->reply_size, reply.hdr.size);
	ret = -EINVAL;
	}
	/* read the message */
	if (msg->reply_size > 0)
	acp_mailbox_read(sdev, offset, msg->reply_data, msg->reply_size);
	}
	out:
	msg->reply_error = ret;
	}

	irqreturn_t acp_sof_ipc_irq_thread(int irq, void *context)
	{
	struct snd_sof_dev *sdev = context;
	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
	unsigned int dsp_msg_write = sdev->debug_box.offset +
	offsetof(struct scratch_ipc_conf, sof_dsp_msg_write);
	unsigned int dsp_ack_write = sdev->debug_box.offset +
	offsetof(struct scratch_ipc_conf, sof_dsp_ack_write);
	bool ipc_irq = false;
	int dsp_msg, dsp_ack;
	unsigned int status;

	if (sdev->first_boot && sdev->fw_state != SOF_FW_BOOT_COMPLETE) {
	acp_mailbox_read(sdev, sdev->dsp_box.offset, &status, sizeof(status));
	if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
	snd_sof_dsp_panic(sdev, sdev->dsp_box.offset + sizeof(status),
	true);
	status = 0;
	acp_mailbox_write(sdev, sdev->dsp_box.offset, &status, sizeof(status));
	return IRQ_HANDLED;
	}
	snd_sof_ipc_msgs_rx(sdev);
	acp_dsp_ipc_host_done(sdev);
	return IRQ_HANDLED;
	}

	dsp_msg = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_msg_write);
	if (dsp_msg) {
	snd_sof_ipc_msgs_rx(sdev);
	acp_dsp_ipc_host_done(sdev);
	ipc_irq = true;
	}

	dsp_ack = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_ack_write);
	if (dsp_ack) {
	spin_lock_irq(&sdev->ipc_lock);
	/* handle immediate reply from DSP core */
	acp_dsp_ipc_get_reply(sdev);
	snd_sof_ipc_reply(sdev, 0);
	/* set the done bit */
	acp_dsp_ipc_dsp_done(sdev);
	spin_unlock_irq(&sdev->ipc_lock);
	ipc_irq = true;
	}

	acp_mailbox_read(sdev, sdev->debug_box.offset, &status, sizeof(u32));
	if ((status & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) {
	snd_sof_dsp_panic(sdev, sdev->dsp_oops_offset, true);
	status = 0;
	acp_mailbox_write(sdev, sdev->debug_box.offset, &status, sizeof(status));
	return IRQ_HANDLED;
	}

	if (desc->probe_reg_offset) {
	u32 val;
	u32 posn;

	/* Probe register consists of two parts
	* (0-30) bit has cumulative position value
	* 31 bit is a synchronization flag between DSP and CPU
	* for the position update
	*/
	val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->probe_reg_offset);
	if (val & PROBE_STATUS_BIT) {
	posn = val & ~PROBE_STATUS_BIT;
	if (adata->probe_stream) {
	/* Probe related posn value is of 31 bits limited to 2GB
	* once wrapped DSP won't send posn interrupt.
	*/
	adata->probe_stream->cstream_posn = posn;
	snd_compr_fragment_elapsed(adata->probe_stream->cstream);
	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->probe_reg_offset, posn);
	ipc_irq = true;
	}
	}
	}

	if (!ipc_irq)
	dev_dbg_ratelimited(sdev->dev, "nothing to do in IPC IRQ thread\n");

	return IRQ_HANDLED;
	}
	EXPORT_SYMBOL_NS(acp_sof_ipc_irq_thread, "SND_SOC_SOF_AMD_COMMON");

	int acp_sof_ipc_msg_data(struct snd_sof_dev sdev, struct snd_sof_pcm_stream sps,
	void *p, size_t sz)
	{
	unsigned int offset = sdev->dsp_box.offset;

	if (!sps \|\| !sdev->stream_box.size) {
	acp_mailbox_read(sdev, offset, p, sz);
	} else {
	struct snd_pcm_substream *substream = sps->substream;
	struct acp_dsp_stream *stream;

	if (!substream \|\| !substream->runtime)
	return -ESTRPIPE;

	stream = substream->runtime->private_data;

	if (!stream)
	return -ESTRPIPE;

	acp_mailbox_read(sdev, stream->posn_offset, p, sz);
	}

	return 0;
	}
	EXPORT_SYMBOL_NS(acp_sof_ipc_msg_data, "SND_SOC_SOF_AMD_COMMON");

	int acp_set_stream_data_offset(struct snd_sof_dev *sdev,
	struct snd_sof_pcm_stream *sps,
	size_t posn_offset)
	{
	struct snd_pcm_substream *substream = sps->substream;
	struct acp_dsp_stream *stream = substream->runtime->private_data;

	/* check for unaligned offset or overflow */
	if (posn_offset > sdev->stream_box.size \|\|
	posn_offset % sizeof(struct sof_ipc_stream_posn) != 0)
	return -EINVAL;

	stream->posn_offset = sdev->stream_box.offset + posn_offset;

	dev_dbg(sdev->dev, "pcm: stream dir %d, posn mailbox offset is %zu",
	substream->stream, stream->posn_offset);

	return 0;
	}
	EXPORT_SYMBOL_NS(acp_set_stream_data_offset, "SND_SOC_SOF_AMD_COMMON");

	int acp_sof_ipc_get_mailbox_offset(struct snd_sof_dev *sdev)
	{
	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);

	return desc->sram_pte_offset;
	}
	EXPORT_SYMBOL_NS(acp_sof_ipc_get_mailbox_offset, "SND_SOC_SOF_AMD_COMMON");

	int acp_sof_ipc_get_window_offset(struct snd_sof_dev *sdev, u32 id)
	{
	return 0;
	}
	EXPORT_SYMBOL_NS(acp_sof_ipc_get_window_offset, "SND_SOC_SOF_AMD_COMMON");

	MODULE_DESCRIPTION("AMD ACP sof-ipc driver");