LL userspace ipc_msg_send() and send_resource_notif() syscalls and related changes

src/audio/google/google_hotword_detect.c

@@ -112,7 +112,7 @@ static struct comp_dev *ghd_create(const struct comp_driver *drv,
 	cd->event.event_type = SOF_CTRL_EVENT_KD;
 	cd->event.num_elems = 0;
 
-	cd->msg = ipc_msg_init(cd->event.rhdr.hdr.cmd, cd->event.rhdr.hdr.size);
+	cd->msg = ipc_msg_init(NULL, cd->event.rhdr.hdr.cmd, cd->event.rhdr.hdr.size);
 	if (!cd->msg) {
 		comp_err(dev, "ipc_msg_init failed");
 		goto cd_fail;

src/audio/host-legacy.c

@@ -560,7 +560,7 @@ int host_common_new(struct host_data *hd, struct comp_dev *dev,
 	ipc_build_stream_posn(&hd->posn, SOF_IPC_STREAM_POSITION, config_id);
 
 #if CONFIG_HOST_DMA_IPC_POSITION_UPDATES
-	hd->msg = ipc_msg_init(hd->posn.rhdr.hdr.cmd, hd->posn.rhdr.hdr.size);
+	hd->msg = ipc_msg_init(NULL, hd->posn.rhdr.hdr.cmd, hd->posn.rhdr.hdr.size);
 	if (!hd->msg) {
 		comp_err(dev, "ipc_msg_init failed");
 		dma_put(hd->dma);

src/audio/host-zephyr.c

@@ -728,7 +728,7 @@ __cold int host_common_new(struct host_data *hd, struct comp_dev *dev,
 	ipc_build_stream_posn(&hd->posn, SOF_IPC_STREAM_POSITION, config_id);
 
 #if CONFIG_HOST_DMA_IPC_POSITION_UPDATES
-	hd->msg = ipc_msg_init(hd->posn.rhdr.hdr.cmd, sizeof(hd->posn));
+	hd->msg = ipc_msg_init(hd->heap, hd->posn.rhdr.hdr.cmd, sizeof(hd->posn));
 	if (!hd->msg) {
 		comp_err(dev, "ipc_msg_init failed");
 		sof_dma_put(hd->dma);

src/audio/mfcc/mfcc.c

@@ -129,7 +129,7 @@ static int mfcc_free(struct processing_module *mod)
 	struct mfcc_comp_data *cd = module_get_private_data(mod);
 
 	comp_info(mod->dev, "entry");
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 	cd->msg = NULL;
 	mod_data_blob_handler_free(mod, cd->model_handler);
 	mfcc_free_buffers(mod);

src/audio/mfcc/mfcc_ipc4.c

@@ -49,10 +49,10 @@ int mfcc_ipc_notification_init(struct processing_module *mod)
 	primary->r.type = SOF_IPC4_GLB_NOTIFICATION;
 	primary->r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REQUEST;
 	primary->r.msg_tgt = SOF_IPC4_MESSAGE_TARGET_FW_GEN_MSG;
-	cd->msg = ipc_msg_w_ext_init(msg_proto.header, msg_proto.extension,
-				     sizeof(struct sof_ipc4_notify_module_data) +
-				     sizeof(struct sof_ipc4_control_msg_payload) +
-				     sizeof(struct sof_ipc4_ctrl_value_chan));
+	cd->msg = mod_ipc_msg_w_ext_init(mod, msg_proto.header, msg_proto.extension,
+					 sizeof(struct sof_ipc4_notify_module_data) +
+					 sizeof(struct sof_ipc4_control_msg_payload) +
+					 sizeof(struct sof_ipc4_ctrl_value_chan));
 	if (!cd->msg) {
 		comp_err(dev, "Failed to initialize VAD notification");
 		return -ENOMEM;

src/audio/module_adapter/module/cadence_ipc4.c

@@ -233,7 +233,7 @@ static struct ipc_msg *cadence_codec_notification_init(struct processing_module
 	primary.r.type = SOF_IPC4_GLB_NOTIFICATION;
 	primary.r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REQUEST;
 	primary.r.msg_tgt = SOF_IPC4_MESSAGE_TARGET_FW_GEN_MSG;
-	msg = ipc_msg_w_ext_init(primary.dat, 0, sizeof(*msg_module_data));
+	msg = mod_ipc_msg_w_ext_init(mod, primary.dat, 0, sizeof(*msg_module_data));
 	if (!msg)
 		return NULL;
 
@@ -366,7 +366,7 @@ static int cadence_codec_init(struct processing_module *mod)
 	if (setup_cfg)
 		mod_free(mod, setup_cfg->data);
 free_notification:
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 free_cd:
 	mod_free(mod, cd);
 
@@ -568,7 +568,7 @@ static int ipc4_cadence_codec_free(struct processing_module *mod)
 {
 	struct cadence_codec_data *cd = module_get_private_data(mod);
 
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 
 	return cadence_codec_free(mod);
 }

src/audio/pipeline/pipeline-graph.c

@@ -158,7 +158,7 @@ struct pipeline *pipeline_new(struct k_heap *heap, uint32_t pipeline_id, uint32_
 	ipc_build_stream_posn(&posn, SOF_IPC_STREAM_TRIG_XRUN, p->comp_id);
 
 	if (posn.rhdr.hdr.size) {
-		p->msg = ipc_msg_init(posn.rhdr.hdr.cmd, posn.rhdr.hdr.size);
+		p->msg = ipc_msg_init(heap, posn.rhdr.hdr.cmd, posn.rhdr.hdr.size);
 		if (!p->msg) {
 			pipe_err(p, "ipc_msg_init failed");
 			goto free;

src/audio/sound_dose/sound_dose-ipc4.c

@@ -32,9 +32,9 @@ static struct ipc_msg *sound_dose_notification_init(struct processing_module *mo
 	primary->r.type = SOF_IPC4_GLB_NOTIFICATION;
 	primary->r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REQUEST;
 	primary->r.msg_tgt = SOF_IPC4_MESSAGE_TARGET_FW_GEN_MSG;
-	msg = ipc_msg_w_ext_init(msg_proto.header, msg_proto.extension,
-				 sizeof(struct sof_ipc4_notify_module_data) +
-				 sizeof(struct sof_ipc4_control_msg_payload));
+	msg = mod_ipc_msg_w_ext_init(mod, msg_proto.header, msg_proto.extension,
+				     sizeof(struct sof_ipc4_notify_module_data) +
+				     sizeof(struct sof_ipc4_control_msg_payload));
 	if (!msg)
 		return NULL;
 

src/audio/sound_dose/sound_dose.c

@@ -327,7 +327,7 @@ __cold static int sound_dose_free(struct processing_module *mod)
 	comp_dbg(mod->dev, "entry");
 
 	sound_dose_filters_free(cd);
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 	rfree(cd->abi);
 	rfree(cd);
 	return 0;

src/audio/tdfb/tdfb.c

@@ -676,7 +676,7 @@ static int tdfb_init(struct processing_module *mod)
 err:
 	/* These are null if not used for IPC version */
 	mod_free(mod, cd->ctrl_data);
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 	mod_data_blob_handler_free(mod, cd->model_handler);
 
 err_free_cd:
@@ -691,7 +691,7 @@ static int tdfb_free(struct processing_module *mod)
 
 	comp_dbg(mod->dev, "entry");
 
-	ipc_msg_free(cd->msg);
+	mod_ipc_msg_free(mod, cd->msg);
 	tdfb_free_delaylines(mod);
 	mod_data_blob_handler_free(mod, cd->model_handler);
 	tdfb_direction_free(mod);

src/audio/tdfb/tdfb_ipc3.c

@@ -36,7 +36,7 @@ static int init_get_ctl_ipc(struct processing_module *mod)
 
 	cd->ctrl_data->rhdr.hdr.cmd = SOF_IPC_GLB_COMP_MSG | SOF_IPC_COMP_GET_VALUE | comp_id;
 	cd->ctrl_data->rhdr.hdr.size = TDFB_GET_CTRL_DATA_SIZE;
-	cd->msg = ipc_msg_init(cd->ctrl_data->rhdr.hdr.cmd, cd->ctrl_data->rhdr.hdr.size);
+	cd->msg = mod_ipc_msg_init(mod, cd->ctrl_data->rhdr.hdr.cmd, cd->ctrl_data->rhdr.hdr.size);
 
 	cd->ctrl_data->comp_id = comp_id;
 	cd->ctrl_data->type = SOF_CTRL_TYPE_VALUE_CHAN_GET;

src/audio/tdfb/tdfb_ipc4.c

@@ -48,8 +48,8 @@ static struct ipc_msg *tdfb_notification_init(struct processing_module *mod,
 	primary->r.type = SOF_IPC4_GLB_NOTIFICATION;
 	primary->r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REQUEST;
 	primary->r.msg_tgt = SOF_IPC4_MESSAGE_TARGET_FW_GEN_MSG;
-	msg = ipc_msg_w_ext_init(msg_proto.header, msg_proto.extension,
-				 sizeof(struct sof_ipc4_notify_module_data) +
+	msg = mod_ipc_msg_w_ext_init(mod, msg_proto.header, msg_proto.extension,
+				     sizeof(struct sof_ipc4_notify_module_data) +
 				 sizeof(struct sof_ipc4_control_msg_payload) +
 				 sizeof(struct sof_ipc4_ctrl_value_chan));
 	if (!msg)

src/include/ipc4/notification.h

@@ -297,4 +297,21 @@ void send_mixer_underrun_notif_msg(uint32_t resource_id, uint32_t eos_flag, uint
 				   uint32_t expected_data_mixed);
 void ipc4_update_notification_mask(uint32_t ntfy_mask, uint32_t enabled_mask);
 
+#ifdef CONFIG_SOF_USERSPACE_LL
+
+__syscall bool send_resource_notif(uint32_t resource_id, uint32_t event_type,
+				   uint32_t resource_type, void *data, uint32_t data_size);
+
+bool z_impl_send_resource_notif(uint32_t resource_id, uint32_t event_type,
+				uint32_t resource_type, void *data, uint32_t data_size);
+
+#include <zephyr/syscalls/notification.h>
+
+#else
+
+bool send_resource_notif(uint32_t resource_id, uint32_t event_type,
+			 uint32_t resource_type, void *data, uint32_t data_size);
+
+#endif /* CONFIG_SOF_USERSPACE_LL */
+
 #endif /* __IPC4_NOTIFICATION_H__ */

src/include/sof/audio/module_adapter/module/generic.h

@@ -19,6 +19,7 @@
 #include <sof/audio/component.h>
 #include <sof/audio/sink_api.h>
 #include <sof/audio/source_api.h>
+#include <sof/ipc/msg.h>
 #include "module_interface.h"
 
 #include <sof/compiler_attributes.h>
@@ -239,6 +240,65 @@ static inline void *mod_zalloc(struct processing_module *mod, size_t size)
 	return ret;
 }
 
+/**
+ * \brief Initialize a new IPC message using the module allocator.
+ * @param mod Module to allocate from
+ * @param header Message header metadata
+ * @param extension Message header extension metadata
+ * @param size Message data size in bytes.
+ * @return New IPC message.
+ */
+static inline struct ipc_msg *mod_ipc_msg_w_ext_init(struct processing_module *mod,
+						     uint32_t header,
+						     uint32_t extension,
+						     uint32_t size)
+{
+	struct ipc_msg *msg;
+
+	msg = mod_zalloc(mod, sizeof(*msg));
+	if (!msg)
+		return NULL;
+
+	if (size) {
+		msg->tx_data = mod_zalloc(mod, size);
+		if (!msg->tx_data) {
+			mod_free(mod, msg);
+			return NULL;
+		}
+	}
+
+	msg->header = header;
+	msg->extension = extension;
+	msg->tx_size = size;
+	list_init(&msg->list);
+
+	return msg;
+}
+
+static inline struct ipc_msg *mod_ipc_msg_init(struct processing_module *mod,
+					       uint32_t header, uint32_t size)
+{
+	return mod_ipc_msg_w_ext_init(mod, header, 0, size);
+}
+
+/**
+ * \brief Free an IPC message allocated with mod_ipc_msg_init() or
+ *        mod_ipc_msg_w_ext_init().
+ * @param mod Module that owns the message.
+ * @param msg Message to free (may be NULL).
+ */
+static inline void mod_ipc_msg_free(struct processing_module *mod,
+				    struct ipc_msg *msg)
+{
+	if (!msg)
+		return;
+
+	ipc_msg_list_remove(msg);
+
+	mod_free(mod, msg->tx_data);
+	mod_free(mod, msg);
+}
+
 #if CONFIG_COMP_BLOB
 #if defined(__ZEPHYR__) && defined(CONFIG_SOF_FULL_ZEPHYR_APPLICATION)
 __syscall struct comp_data_blob_handler *mod_data_blob_handler_new(struct processing_module *mod);

src/include/sof/ipc/ipc_msg_list_remove.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright(c) 2026 Intel Corporation. All rights reserved.
+ */
+
+#ifndef __SOF_IPC_IPC_MSG_LIST_REMOVE_H__
+#define __SOF_IPC_IPC_MSG_LIST_REMOVE_H__
+
+struct ipc_msg;
+
+/**
+ * \brief Remove an IPC message from the send queue.
+ *
+ * Acquires the IPC lock and removes the message from its list.
+ * Safe to call from userspace.
+ *
+ * @param msg The IPC message to remove from the queue.
+ */
+#if defined(__ZEPHYR__) && defined(CONFIG_SOF_USERSPACE_LL)
+__syscall void ipc_msg_list_remove(struct ipc_msg *msg);
+#else
+void z_impl_ipc_msg_list_remove(struct ipc_msg *msg);
+#define ipc_msg_list_remove z_impl_ipc_msg_list_remove
+#endif
+
+#if defined(__ZEPHYR__) && defined(CONFIG_SOF_USERSPACE_LL)
+#include <zephyr/syscalls/ipc_msg_list_remove.h>
+#endif
+
+#endif /* __SOF_IPC_IPC_MSG_LIST_REMOVE_H__ */

src/include/sof/ipc/ipc_msg_send.h

@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright(c) 2026 Intel Corporation. All rights reserved.
+ */
+
+#ifndef __SOF_IPC_IPC_MSG_SEND_H__
+#define __SOF_IPC_IPC_MSG_SEND_H__
+
+#include <stdbool.h>
+
+struct ipc_msg;
+
+/**
+ * \brief Queues an IPC message for transmission.
+ * @param msg The IPC message.
+ * @param data The message data.
+ * @param high_priority True if a high priority message.
+ */
+#if defined(__ZEPHYR__) && defined(CONFIG_SOF_USERSPACE_LL)
+__syscall void ipc_msg_send(struct ipc_msg *msg, void *data,
+			    bool high_priority);
+#else
+void z_impl_ipc_msg_send(struct ipc_msg *msg, void *data,
+			  bool high_priority);
+#define ipc_msg_send z_impl_ipc_msg_send
+#endif
+
+#if defined(__ZEPHYR__) && defined(CONFIG_SOF_USERSPACE_LL)
+#include <zephyr/syscalls/ipc_msg_send.h>
+#endif
+
+#endif /* __SOF_IPC_IPC_MSG_SEND_H__ */