ASoC: SOF: IPC4: Introduce message handling functionality

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

The series adds the basic IPC4 message handling code, implementing the ipc
callbacks.
Due to the difference between IPC3 and IPC4 messaging we need to introduce new
message container for IPC4, but the SOF internal callbacks and structures can be
kept as they were and leaving it for the IPC specific code to handle the
differences.

The series provides the foundation for both lowe level (sound/soc/sof/intel) and
high level IPC4 implementation (topologies, firmware loading, control handling,
etc).

3 files changed, 610 insertions, 1 deletions

diff --git a/sound/soc/sof/Makefile b/sound/soc/sof/Makefile
index e7dc47b01437..482a4c85f4c8 100644
--- a/sound/soc/sof/Makefile
+++ b/sound/soc/sof/Makefile
@@ -2,7 +2,8 @@
 
 snd-sof-objs := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\
 		control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o\
-		ipc3-topology.o ipc3-control.o ipc3.o ipc3-pcm.o ipc3-loader.o
+		ipc3-topology.o ipc3-control.o ipc3.o ipc3-pcm.o ipc3-loader.o\
+		ipc4.o
 ifneq ($(CONFIG_SND_SOC_SOF_CLIENT),)
 snd-sof-objs += sof-client.o
 endif
diff --git a/sound/soc/sof/ipc4.c b/sound/soc/sof/ipc4.c
new file mode 100644
index 000000000000..b561312a3e0f
--- /dev/null
+++ b/sound/soc/sof/ipc4.c
@@ -0,0 +1,604 @@
+// 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) 2022 Intel Corporation. All rights reserved.
+//
+// Authors: Rander Wang <rander.wang@linux.intel.com>
+//	    Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
+//
+#include <sound/sof/header.h>
+#include <sound/sof/ipc4/header.h>
+#include "sof-priv.h"
+#include "sof-audio.h"
+#include "ops.h"
+
+#ifdef DEBUG_VERBOSE
+#define sof_ipc4_dump_payload(sdev, ipc_data, size)			\
+		print_hex_dump_debug("Message payload: ",		\
+				     DUMP_PREFIX_OFFSET,		\
+				     16, 4, ipc_data, size, false)
+#else
+#define sof_ipc4_dump_payload(sdev, ipc_data, size)	do { } while (0)
+#endif
+
+static const struct sof_ipc4_fw_status {
+	int status;
+	char *msg;
+} ipc4_status[] = {
+	{0, "The operation was successful"},
+	{1, "Invalid parameter specified"},
+	{2, "Unknown message type specified"},
+	{3, "Not enough space in the IPC reply buffer to complete the request"},
+	{4, "The system or resource is busy"},
+	{5, "Replaced ADSP IPC PENDING (unused)"},
+	{6, "Unknown error while processing the request"},
+	{7, "Unsupported operation requested"},
+	{8, "Reserved (ADSP_STAGE_UNINITIALIZED removed)"},
+	{9, "Specified resource not found"},
+	{10, "A resource's ID requested to be created is already assigned"},
+	{11, "Reserved (ADSP_IPC_OUT_OF_MIPS removed)"},
+	{12, "Required resource is in invalid state"},
+	{13, "Requested power transition failed to complete"},
+	{14, "Manifest of the library being loaded is invalid"},
+	{15, "Requested service or data is unavailable on the target platform"},
+	{42, "Library target address is out of storage memory range"},
+	{43, "Reserved"},
+	{44, "Image verification by CSE failed"},
+	{100, "General module management error"},
+	{101, "Module loading failed"},
+	{102, "Integrity check of the loaded module content failed"},
+	{103, "Attempt to unload code of the module in use"},
+	{104, "Other failure of module instance initialization request"},
+	{105, "Reserved (ADSP_IPC_OUT_OF_MIPS removed)"},
+	{106, "Reserved (ADSP_IPC_CONFIG_GET_ERROR removed)"},
+	{107, "Reserved (ADSP_IPC_CONFIG_SET_ERROR removed)"},
+	{108, "Reserved (ADSP_IPC_LARGE_CONFIG_GET_ERROR removed)"},
+	{109, "Reserved (ADSP_IPC_LARGE_CONFIG_SET_ERROR removed)"},
+	{110, "Invalid (out of range) module ID provided"},
+	{111, "Invalid module instance ID provided"},
+	{112, "Invalid queue (pin) ID provided"},
+	{113, "Invalid destination queue (pin) ID provided"},
+	{114, "Reserved (ADSP_IPC_BIND_UNBIND_DST_SINK_UNSUPPORTED removed)"},
+	{115, "Reserved (ADSP_IPC_UNLOAD_INST_EXISTS removed)"},
+	{116, "Invalid target code ID provided"},
+	{117, "Injection DMA buffer is too small for probing the input pin"},
+	{118, "Extraction DMA buffer is too small for probing the output pin"},
+	{120, "Invalid ID of configuration item provided in TLV list"},
+	{121, "Invalid length of configuration item provided in TLV list"},
+	{122, "Invalid structure of configuration item provided"},
+	{140, "Initialization of DMA Gateway failed"},
+	{141, "Invalid ID of gateway provided"},
+	{142, "Setting state of DMA Gateway failed"},
+	{143, "DMA_CONTROL message targeting gateway not allocated yet"},
+	{150, "Attempt to configure SCLK while I2S port is running"},
+	{151, "Attempt to configure MCLK while I2S port is running"},
+	{152, "Attempt to stop SCLK that is not running"},
+	{153, "Attempt to stop MCLK that is not running"},
+	{160, "Reserved (ADSP_IPC_PIPELINE_NOT_INITIALIZED removed)"},
+	{161, "Reserved (ADSP_IPC_PIPELINE_NOT_EXIST removed)"},
+	{162, "Reserved (ADSP_IPC_PIPELINE_SAVE_FAILED removed)"},
+	{163, "Reserved (ADSP_IPC_PIPELINE_RESTORE_FAILED removed)"},
+	{165, "Reserved (ADSP_IPC_PIPELINE_ALREADY_EXISTS removed)"},
+};
+
+static int sof_ipc4_check_reply_status(struct snd_sof_dev *sdev, u32 status)
+{
+	int i, ret;
+
+	status &= SOF_IPC4_REPLY_STATUS;
+
+	if (!status)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(ipc4_status); i++) {
+		if (ipc4_status[i].status == status) {
+			dev_err(sdev->dev, "FW reported error: %u - %s\n",
+				status, ipc4_status[i].msg);
+			goto to_errno;
+		}
+	}
+
+	if (i == ARRAY_SIZE(ipc4_status))
+		dev_err(sdev->dev, "FW reported error: %u - Unknown\n", status);
+
+to_errno:
+	switch (status) {
+	case 8:
+	case 11:
+	case 105 ... 109:
+	case 114 ... 115:
+	case 160 ... 163:
+	case 165:
+		ret = -ENOENT;
+		break;
+	case 4:
+	case 150:
+	case 151:
+		ret = -EBUSY;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_VERBOSE_IPC)
+#define DBG_IPC4_MSG_TYPE_ENTRY(type)	[SOF_IPC4_##type] = #type
+static const char * const ipc4_dbg_mod_msg_type[] = {
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_INIT_INSTANCE),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_CONFIG_GET),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_CONFIG_SET),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_LARGE_CONFIG_GET),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_LARGE_CONFIG_SET),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_BIND),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_UNBIND),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_SET_DX),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_SET_D0IX),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_ENTER_MODULE_RESTORE),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_EXIT_MODULE_RESTORE),
+	DBG_IPC4_MSG_TYPE_ENTRY(MOD_DELETE_INSTANCE),
+};
+
+static const char * const ipc4_dbg_glb_msg_type[] = {
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_BOOT_CONFIG),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_ROM_CONTROL),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_IPCGATEWAY_CMD),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_PERF_MEASUREMENTS_CMD),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_CHAIN_DMA),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_LOAD_MULTIPLE_MODULES),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_UNLOAD_MULTIPLE_MODULES),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_CREATE_PIPELINE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_DELETE_PIPELINE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_SET_PIPELINE_STATE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_GET_PIPELINE_STATE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_GET_PIPELINE_CONTEXT_SIZE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_SAVE_PIPELINE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_RESTORE_PIPELINE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_LOAD_LIBRARY),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_INTERNAL_MESSAGE),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_NOTIFICATION),
+};
+
+#define DBG_IPC4_NOTIFICATION_TYPE_ENTRY(type)	[SOF_IPC4_NOTIFY_##type] = #type
+static const char * const ipc4_dbg_notification_type[] = {
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(PHRASE_DETECTED),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(RESOURCE_EVENT),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(LOG_BUFFER_STATUS),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(TIMESTAMP_CAPTURED),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(FW_READY),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(FW_AUD_CLASS_RESULT),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(EXCEPTION_CAUGHT),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(MODULE_NOTIFICATION),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(PROBE_DATA_AVAILABLE),
+	DBG_IPC4_NOTIFICATION_TYPE_ENTRY(ASYNC_MSG_SRVC_MESSAGE),
+};
+
+static void sof_ipc4_log_header(struct device *dev, u8 *text, struct sof_ipc4_msg *msg,
+				bool data_size_valid)
+{
+	u32 val, type;
+	const u8 *str2 = NULL;
+	const u8 *str = NULL;
+
+	val = msg->primary & SOF_IPC4_MSG_TARGET_MASK;
+	type = SOF_IPC4_MSG_TYPE_GET(msg->primary);
+
+	if (val == SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG)) {
+		/* Module message */
+		if (type < SOF_IPC4_MOD_TYPE_LAST)
+			str = ipc4_dbg_mod_msg_type[type];
+		if (!str)
+			str = "Unknown Module message type";
+	} else {
+		/* Global FW message */
+		if (type < SOF_IPC4_GLB_TYPE_LAST)
+			str = ipc4_dbg_glb_msg_type[type];
+		if (!str)
+			str = "Unknown Global message type";
+
+		if (type == SOF_IPC4_GLB_NOTIFICATION) {
+			/* Notification message */
+			u32 notif = SOF_IPC4_NOTIFICATION_TYPE_GET(msg->primary);
+
+			if (notif < SOF_IPC4_NOTIFY_TYPE_LAST)
+				str2 = ipc4_dbg_notification_type[notif];
+			if (!str2)
+				str2 = "Unknown Global notification";
+		}
+	}
+
+	if (str2) {
+		if (data_size_valid && msg->data_size)
+			dev_dbg(dev, "%s: %#x|%#x: %s|%s [data size: %zu]\n",
+				text, msg->primary, msg->extension, str, str2,
+				msg->data_size);
+		else
+			dev_dbg(dev, "%s: %#x|%#x: %s|%s\n", text, msg->primary,
+				msg->extension, str, str2);
+	} else {
+		if (data_size_valid && msg->data_size)
+			dev_dbg(dev, "%s: %#x|%#x: %s [data size: %zu]\n",
+				text, msg->primary, msg->extension, str,
+				msg->data_size);
+		else
+			dev_dbg(dev, "%s: %#x|%#x: %s\n", text, msg->primary,
+				msg->extension, str);
+	}
+}
+#else /* CONFIG_SND_SOC_SOF_DEBUG_VERBOSE_IPC */
+static void sof_ipc4_log_header(struct device *dev, u8 *text, struct sof_ipc4_msg *msg,
+				bool data_size_valid)
+{
+	if (data_size_valid && msg->data_size)
+		dev_dbg(dev, "%s: %#x|%#x [data size: %zu]\n", text,
+			msg->primary, msg->extension, msg->data_size);
+	else
+		dev_dbg(dev, "%s: %#x|%#x\n", text, msg->primary, msg->extension);
+}
+#endif
+
+static int sof_ipc4_get_reply(struct snd_sof_dev *sdev)
+{
+	struct snd_sof_ipc_msg *msg = sdev->msg;
+	struct sof_ipc4_msg *ipc4_reply;
+	int ret;
+
+	/* get the generic reply */
+	ipc4_reply = msg->reply_data;
+
+	sof_ipc4_log_header(sdev->dev, "ipc tx reply", ipc4_reply, false);
+
+	ret = sof_ipc4_check_reply_status(sdev, ipc4_reply->primary);
+	if (ret)
+		return ret;
+
+	/* No other information is expected for non large config get replies */
+	if (!msg->reply_size || !SOF_IPC4_MSG_IS_MODULE_MSG(ipc4_reply->primary) ||
+	    (SOF_IPC4_MSG_TYPE_GET(ipc4_reply->primary) != SOF_IPC4_MOD_LARGE_CONFIG_GET))
+		return 0;
+
+	/* Read the requested payload */
+	snd_sof_dsp_mailbox_read(sdev, sdev->dsp_box.offset, ipc4_reply->data_ptr,
+				 msg->reply_size);
+
+	return 0;
+}
+
+/* wait for IPC message reply */
+static int ipc4_wait_tx_done(struct snd_sof_ipc *ipc, void *reply_data)
+{
+	struct snd_sof_ipc_msg *msg = &ipc->msg;
+	struct sof_ipc4_msg *ipc4_msg = msg->msg_data;
+	struct snd_sof_dev *sdev = ipc->sdev;
+	int ret;
+
+	/* wait for DSP IPC completion */
+	ret = wait_event_timeout(msg->waitq, msg->ipc_complete,
+				 msecs_to_jiffies(sdev->ipc_timeout));
+	if (ret == 0) {
+		dev_err(sdev->dev, "ipc timed out for %#x|%#x\n",
+			ipc4_msg->primary, ipc4_msg->extension);
+		return -ETIMEDOUT;
+	}
+
+	if (msg->reply_error) {
+		dev_err(sdev->dev, "ipc error for msg %#x|%#x\n",
+			ipc4_msg->primary, ipc4_msg->extension);
+		ret =  msg->reply_error;
+	} else {
+		if (reply_data) {
+			struct sof_ipc4_msg *ipc4_reply = msg->reply_data;
+			struct sof_ipc4_msg *ipc4_reply_data = reply_data;
+
+			/* Copy the header */
+			ipc4_reply_data->header_u64 = ipc4_reply->header_u64;
+			if (msg->reply_size && ipc4_reply_data->data_ptr) {
+				/* copy the payload returned from DSP */
+				memcpy(ipc4_reply_data->data_ptr, ipc4_reply->data_ptr,
+				       msg->reply_size);
+				ipc4_reply_data->data_size = msg->reply_size;
+			}
+		}
+
+		ret = 0;
+		sof_ipc4_log_header(sdev->dev, "ipc tx done ", ipc4_msg, true);
+	}
+
+	/* re-enable dumps after successful IPC tx */
+	if (sdev->ipc_dump_printed) {
+		sdev->dbg_dump_printed = false;
+		sdev->ipc_dump_printed = false;
+	}
+
+	return ret;
+}
+
+static int ipc4_tx_msg_unlocked(struct snd_sof_ipc *ipc,
+				void *msg_data, size_t msg_bytes,
+				void *reply_data, size_t reply_bytes)
+{
+	struct sof_ipc4_msg *ipc4_msg = msg_data;
+	struct snd_sof_dev *sdev = ipc->sdev;
+	int ret;
+
+	if (msg_bytes > ipc->max_payload_size || reply_bytes > ipc->max_payload_size)
+		return -EINVAL;
+
+	ret = sof_ipc_send_msg(sdev, msg_data, msg_bytes, reply_bytes);
+	if (ret) {
+		dev_err_ratelimited(sdev->dev,
+				    "%s: ipc message send for %#x|%#x failed: %d\n",
+				    __func__, ipc4_msg->primary, ipc4_msg->extension, ret);
+		return ret;
+	}
+
+	sof_ipc4_log_header(sdev->dev, "ipc tx      ", msg_data, true);
+
+	/* now wait for completion */
+	return ipc4_wait_tx_done(ipc, reply_data);
+}
+
+static int sof_ipc4_tx_msg(struct snd_sof_dev *sdev, void *msg_data, size_t msg_bytes,
+			   void *reply_data, size_t reply_bytes, bool no_pm)
+{
+	struct snd_sof_ipc *ipc = sdev->ipc;
+#ifdef DEBUG_VERBOSE
+	struct sof_ipc4_msg *msg = NULL;
+#endif
+	int ret;
+
+	if (!msg_data)
+		return -EINVAL;
+
+	/* Serialise IPC TX */
+	mutex_lock(&ipc->tx_mutex);
+
+	ret = ipc4_tx_msg_unlocked(ipc, msg_data, msg_bytes, reply_data, reply_bytes);
+
+	mutex_unlock(&ipc->tx_mutex);
+
+#ifdef DEBUG_VERBOSE
+	/* payload is indicated by non zero msg/reply_bytes */
+	if (msg_bytes)
+		msg = msg_data;
+	else if (reply_bytes)
+		msg = reply_data;
+
+	if (msg)
+		sof_ipc4_dump_payload(sdev, msg->data_ptr, msg->data_size);
+#endif
+
+	return ret;
+}
+
+static int sof_ipc4_set_get_data(struct snd_sof_dev *sdev, void *data,
+				 size_t payload_bytes, bool set)
+{
+	size_t payload_limit = sdev->ipc->max_payload_size;
+	struct sof_ipc4_msg *ipc4_msg = data;
+	struct sof_ipc4_msg tx = {{ 0 }};
+	struct sof_ipc4_msg rx = {{ 0 }};
+	size_t remaining = payload_bytes;
+	size_t offset = 0;
+	size_t chunk_size;
+	int ret;
+
+	if (!data)
+		return -EINVAL;
+
+	if ((ipc4_msg->primary & SOF_IPC4_MSG_TARGET_MASK) !=
+	    SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG))
+		return -EINVAL;
+
+	ipc4_msg->primary &= ~SOF_IPC4_MSG_TYPE_MASK;
+	tx.primary = ipc4_msg->primary;
+	tx.extension = ipc4_msg->extension;
+
+	if (set)
+		tx.primary |= SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_MOD_LARGE_CONFIG_SET);
+	else
+		tx.primary |= SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_MOD_LARGE_CONFIG_GET);
+
+	tx.extension &= ~SOF_IPC4_MOD_EXT_MSG_SIZE_MASK;
+	tx.extension |= SOF_IPC4_MOD_EXT_MSG_SIZE(payload_bytes);
+
+	tx.extension |= SOF_IPC4_MOD_EXT_MSG_FIRST_BLOCK(1);
+
+	/* Serialise IPC TX */
+	mutex_lock(&sdev->ipc->tx_mutex);
+
+	do {
+		size_t tx_size, rx_size;
+
+		if (remaining > payload_limit) {
+			chunk_size = payload_limit;
+		} else {
+			chunk_size = remaining;
+			if (set)
+				tx.extension |= SOF_IPC4_MOD_EXT_MSG_LAST_BLOCK(1);
+		}
+
+		if (offset) {
+			tx.extension &= ~SOF_IPC4_MOD_EXT_MSG_FIRST_BLOCK_MASK;
+			tx.extension &= ~SOF_IPC4_MOD_EXT_MSG_SIZE_MASK;
+			tx.extension |= SOF_IPC4_MOD_EXT_MSG_SIZE(offset);
+		}
+
+		if (set) {
+			tx.data_size = chunk_size;
+			tx.data_ptr = ipc4_msg->data_ptr + offset;
+
+			tx_size = chunk_size;
+			rx_size = 0;
+		} else {
+			rx.primary = 0;
+			rx.extension = 0;
+			rx.data_size = chunk_size;
+			rx.data_ptr = ipc4_msg->data_ptr + offset;
+
+			tx_size = 0;
+			rx_size = chunk_size;
+		}
+
+		/* Send the message for the current chunk */
+		ret = ipc4_tx_msg_unlocked(sdev->ipc, &tx, tx_size, &rx, rx_size);
+		if (ret < 0) {
+			dev_err(sdev->dev,
+				"%s: large config %s failed at offset %zu: %d\n",
+				__func__, set ? "set" : "get", offset, ret);
+			goto out;
+		}
+
+		if (!set && rx.extension & SOF_IPC4_MOD_EXT_MSG_FIRST_BLOCK_MASK) {
+			/* Verify the firmware reported total payload size */
+			rx_size = rx.extension & SOF_IPC4_MOD_EXT_MSG_SIZE_MASK;
+
+			if (rx_size > payload_bytes) {
+				dev_err(sdev->dev,
+					"%s: Receive buffer (%zu) is too small for %zu\n",
+					__func__, payload_bytes, rx_size);
+				ret = -ENOMEM;
+				goto out;
+			}
+
+			if (rx_size < chunk_size) {
+				chunk_size = rx_size;
+				remaining = rx_size;
+			} else if (rx_size < payload_bytes) {
+				remaining = rx_size;
+			}
+		}
+
+		offset += chunk_size;
+		remaining -= chunk_size;
+	} while (remaining);
+
+	/* Adjust the received data size if needed */
+	if (!set && payload_bytes != offset)
+		ipc4_msg->data_size = offset;
+
+	sof_ipc4_dump_payload(sdev, ipc4_msg->data_ptr, ipc4_msg->data_size);
+
+out:
+	mutex_unlock(&sdev->ipc->tx_mutex);
+
+	return ret;
+}
+
+static int sof_ipc4_init_msg_memory(struct snd_sof_dev *sdev)
+{
+	struct sof_ipc4_msg *ipc4_msg;
+	struct snd_sof_ipc_msg *msg = &sdev->ipc->msg;
+
+	/* TODO: get max_payload_size from firmware */
+	sdev->ipc->max_payload_size = SOF_IPC4_MSG_MAX_SIZE;
+
+	/* Allocate memory for the ipc4 container and the maximum payload */
+	msg->reply_data = devm_kzalloc(sdev->dev, sdev->ipc->max_payload_size +
+				       sizeof(struct sof_ipc4_msg), GFP_KERNEL);
+	if (!msg->reply_data)
+		return -ENOMEM;
+
+	ipc4_msg = msg->reply_data;
+	ipc4_msg->data_ptr = msg->reply_data + sizeof(struct sof_ipc4_msg);
+
+	return 0;
+}
+
+static int ipc4_fw_ready(struct snd_sof_dev *sdev, struct sof_ipc4_msg *ipc4_msg)
+{
+	int inbox_offset, inbox_size, outbox_offset, outbox_size;
+
+	/* no need to re-check version/ABI for subsequent boots */
+	if (!sdev->first_boot)
+		return 0;
+
+	/* Set up the windows for IPC communication */
+	inbox_offset = snd_sof_dsp_get_mailbox_offset(sdev);
+	if (inbox_offset < 0) {
+		dev_err(sdev->dev, "%s: No mailbox offset\n", __func__);
+		return inbox_offset;
+	}
+	inbox_size = SOF_IPC4_MSG_MAX_SIZE;
+	outbox_offset = snd_sof_dsp_get_window_offset(sdev, 1);
+	outbox_size = SOF_IPC4_MSG_MAX_SIZE;
+
+	sdev->dsp_box.offset = inbox_offset;
+	sdev->dsp_box.size = inbox_size;
+	sdev->host_box.offset = outbox_offset;
+	sdev->host_box.size = outbox_size;
+
+	dev_dbg(sdev->dev, "mailbox upstream 0x%x - size 0x%x\n",
+		inbox_offset, inbox_size);
+	dev_dbg(sdev->dev, "mailbox downstream 0x%x - size 0x%x\n",
+		outbox_offset, outbox_size);
+
+	return sof_ipc4_init_msg_memory(sdev);
+}
+
+static void sof_ipc4_rx_msg(struct snd_sof_dev *sdev)
+{
+	struct sof_ipc4_msg *ipc4_msg = sdev->ipc->msg.rx_data;
+	size_t data_size = 0;
+	int err;
+
+	if (!ipc4_msg || !SOF_IPC4_MSG_IS_NOTIFICATION(ipc4_msg->primary))
+		return;
+
+	ipc4_msg->data_ptr = NULL;
+	ipc4_msg->data_size = 0;
+
+	sof_ipc4_log_header(sdev->dev, "ipc rx      ", ipc4_msg, false);
+
+	switch (SOF_IPC4_NOTIFICATION_TYPE_GET(ipc4_msg->primary)) {
+	case SOF_IPC4_NOTIFY_FW_READY:
+		/* check for FW boot completion */
+		if (sdev->fw_state == SOF_FW_BOOT_IN_PROGRESS) {
+			err = ipc4_fw_ready(sdev, ipc4_msg);
+			if (err < 0)
+				sof_set_fw_state(sdev, SOF_FW_BOOT_READY_FAILED);
+			else
+				sof_set_fw_state(sdev, SOF_FW_BOOT_READY_OK);
+
+			/* wake up firmware loader */
+			wake_up(&sdev->boot_wait);
+		}
+
+		break;
+	case SOF_IPC4_NOTIFY_RESOURCE_EVENT:
+		data_size = sizeof(struct sof_ipc4_notify_resource_data);
+		break;
+	default:
+		dev_dbg(sdev->dev, "%s: Unhandled DSP message: %#x|%#x\n", __func__,
+			ipc4_msg->primary, ipc4_msg->extension);
+		break;
+	}
+
+	if (data_size) {
+		ipc4_msg->data_ptr = kmalloc(data_size, GFP_KERNEL);
+		if (!ipc4_msg->data_ptr)
+			return;
+
+		ipc4_msg->data_size = data_size;
+		snd_sof_ipc_msg_data(sdev, NULL, ipc4_msg->data_ptr, ipc4_msg->data_size);
+	}
+
+	sof_ipc4_log_header(sdev->dev, "ipc rx done ", ipc4_msg, true);
+
+	if (data_size) {
+		kfree(ipc4_msg->data_ptr);
+		ipc4_msg->data_ptr = NULL;
+		ipc4_msg->data_size = 0;
+	}
+}
+
+const struct sof_ipc_ops ipc4_ops = {
+	.tx_msg = sof_ipc4_tx_msg,
+	.rx_msg = sof_ipc4_rx_msg,
+	.set_get_data = sof_ipc4_set_get_data,
+	.get_reply = sof_ipc4_get_reply,
+};
diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h
index 4801849cb2ab..8ea196305e4b 100644
--- a/sound/soc/sof/sof-priv.h
+++ b/sound/soc/sof/sof-priv.h
@@ -350,6 +350,9 @@ struct snd_sof_ipc_msg {
 	size_t reply_size;
 	int reply_error;
 
+	/* notification, firmware initiated messages */
+	void *rx_data;
+
 	wait_queue_head_t waitq;
 	bool ipc_complete;
 };
@@ -765,5 +768,6 @@ static inline int sof_resume_clients(struct snd_sof_dev *sdev)
 
 /* Main ops for IPC implementations */
 extern const struct sof_ipc_ops ipc3_ops;
+extern const struct sof_ipc_ops ipc4_ops;
 
 #endif