nrfs: add GDFS service

Signed-off-by: Paweł Pelikan <pawel.pelikan@nordicsemi.no>

nrfs/include/internal/nrfs_callbacks.h

@@ -106,6 +106,16 @@ void nrfs_clock_service_notify(void *p_notification, size_t size);
  */
 void nrfs_gdpwr_service_notify(void *p_notification, size_t size);
 
+/**
+ * @brief Function for notifying the GDFS service about incoming message.
+ *
+ * This function is called internally by the dispatcher when the corresponding message arrives.
+ *
+ * @param[in] p_notification Pointer to the notification payload.
+ * @param[in] size           Notification payload size.
+ */
+void nrfs_gdfs_service_notify(void *p_notification, size_t size);
+
 #ifdef __cplusplus
 }
 #endif

nrfs/include/internal/nrfs_hdr.h

@@ -12,14 +12,14 @@
 #include <internal/requests/nrfs_clock_reqs.h>
 #include <internal/requests/nrfs_diag_reqs.h>
 #include <internal/requests/nrfs_dvfs_reqs.h>
+#include <internal/requests/nrfs_gdfs_reqs.h>
 #include <internal/requests/nrfs_gdpwr_reqs.h>
 #include <internal/requests/nrfs_mram_reqs.h>
 #include <internal/requests/nrfs_pmic_reqs.h>
 #include <internal/requests/nrfs_reset_reqs.h>
 #include <internal/requests/nrfs_temp_reqs.h>
 #include <internal/requests/nrfs_usb_reqs.h>
 
-
 #ifdef __cplusplus
 extern "C" {
 #endif

nrfs/include/internal/requests/nrfs_gdfs_reqs.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef NRFS_GDFS_REQS_H
+#define NRFS_GDFS_REQS_H
+
+#include "nrfs_reqs_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+	NRFS_GDFS_REQ_FREQ	     = NRFS_REQUEST_ID_DEF(NRFS_SERVICE_ID_GDFS, 0x01),
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NRFS_GDFS_REQS_H */

nrfs/include/internal/requests/nrfs_reqs_common.h

@@ -61,7 +61,8 @@ enum {
 	NRFS_SERVICE_ID_PMIC,
 	NRFS_SERVICE_ID_RESET,
 	NRFS_SERVICE_ID_TEMP,
-	NRFS_SERVICE_ID_USB
+	NRFS_SERVICE_ID_USB,
+	NRFS_SERVICE_ID_GDFS
 };
 
 #ifdef __cplusplus

nrfs/include/internal/services/nrfs_gdfs.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef NRFS_INTERNAL_GDFS_H
+#define NRFS_INTERNAL_GDFS_H
+
+#include <internal/services/nrfs_generic.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum __NRFS_PACKED gdfs_frequency_setting {
+	GDFS_FREQ_HIGH		= 0,
+	GDFS_FREQ_MEDHIGH	= 1,
+	GDFS_FREQ_MEDLOW	= 2,
+	GDFS_FREQ_LOW		= 3,
+	GDFS_FREQ_COUNT
+};
+
+/** @brief Global Domain Frequency Scaling service request data structure. */
+typedef struct __NRFS_PACKED {
+	enum gdfs_frequency_setting target_freq; /** Requested frequency oppoint. */
+} nrfs_gdfs_req_data_t;
+
+/** @brief Global Domain Frequency Scaling frequency change request structure. */
+typedef struct __NRFS_PACKED {
+	nrfs_hdr_t hdr;		       /**< Header of the message. */
+	nrfs_ctx_t ctx;		       /**< Context of the message. */
+	nrfs_gdfs_req_data_t data; /**< Data of the request. */
+} nrfs_gdfs_req_t;
+
+/** @brief Global Domain Frequency Scaling service notification structure. */
+typedef struct __NRFS_PACKED {
+	nrfs_hdr_t hdr;		   /**< Header of the message. */
+	nrfs_ctx_t ctx;		   /**< Context of the message. */
+} nrfs_gdfs_rsp_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NRFS_INTERNAL_GDFS_H */

nrfs/include/services/nrfs_gdfs.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef NRFS_GDFS_H
+#define NRFS_GDFS_H
+
+#include <internal/services/nrfs_gdfs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @brief Global Domain Frequency Scaling service event types. */
+typedef enum __NRFS_PACKED {
+	NRFS_GDFS_EVT_REJECT, /** General purpose event for rejected requests. */
+	NRFS_GDFS_EVT_FREQ_CONFIRMED, /** Frequency has been acheived. */
+} nrfs_gdfs_evt_type_t;
+
+/** @brief Global Domain Frequency Scaling service event. */
+typedef struct {
+	nrfs_gdfs_evt_type_t type;			/** Event type. */
+} nrfs_gdfs_evt_t;
+
+/** @brief Global Domain Frequency Scaling service event handler type. */
+typedef void (*nrfs_gdfs_evt_handler_t)(nrfs_gdfs_evt_t const * p_evt, void * context);
+
+/**
+ * @brief Function for initializing the Global Domain Frequency Scaling service.
+ *
+ * @param[in] handler Function called as a response to the request.
+ *
+ * @retval NRFS_SUCCESS           Service initialized successfully.
+ * @retval NRFS_ERR_INVALID_STATE Service was already initialized.
+ */
+nrfs_err_t nrfs_gdfs_init(nrfs_gdfs_evt_handler_t handler);
+
+/**
+ * @brief Function for uninitializing the Global Domain Frequency Scaling service.
+ *
+ * @warning Notifications from previous requests are dropped after service uninitialization.
+ */
+void nrfs_gdfs_uninit(void);
+
+/**
+ * @brief Function for requesting a frequency change.
+ * @note The @p target_freq requirement might not be met by the system
+ * until the NRFS_GDFS_EVT_FREQ_CONFIRMED response is triggered.
+ *
+ * @param[in] target_freq  Minimal required frequency
+ * @param[in] p_context    Opaque user data that will be passed to registered callback.
+ *
+ * @retval NRFS_SUCCESS           Request sent successfully.
+ * @retval NRFS_ERR_INVALID_STATE Service is uninitialized.
+ * @retval NRFS_ERR_IPC           Backend returned error during request sending.
+ */
+nrfs_err_t nrfs_gdfs_request_freq(enum gdfs_frequency_setting target_freq, void * p_context);
+
+/**
+ * @brief Function for requesting a frequency change.
+ * @note The response @p NRFS_GDFS_EVT_FREQ_CONFIRMED will not be triggered.
+ *
+ * @param[in] target_freq  Minimal required frequency
+ * @param[in] p_context    Opaque user data that will be passed to registered callback.
+ *
+ * @retval NRFS_SUCCESS           Request sent successfully.
+ * @retval NRFS_ERR_INVALID_STATE Service is uninitialized.
+ * @retval NRFS_ERR_IPC           Backend returned error during request sending.
+ */
+nrfs_err_t nrfs_gdfs_request_freq_no_rsp(enum gdfs_frequency_setting target_freq, void * p_context);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NRFS_GDFS_H */

nrfs/src/internal/nrfs_dispatcher.c

@@ -55,6 +55,11 @@ static const nrfs_service_cb_t services_callbacks[] = {
 #else
 	[NRFS_SERVICE_ID_GDPWR]	= NULL,
 #endif
+#ifdef NRFS_GDFS_SERVICE_ENABLED
+	[NRFS_SERVICE_ID_GDFS] = nrfs_gdfs_service_notify,
+#else
+	[NRFS_SERVICE_ID_GDFS]	= NULL,
+#endif
 };
 
 /* Warning! All "UNSOLICITED" features are not supported. This is intended for possible future use. */

nrfs/src/services/nrfs_gdfs.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <internal/nrfs_backend.h>
+#include <internal/nrfs_callbacks.h>
+#include <nrfs_gdfs.h>
+
+typedef struct {
+	nrfs_gdfs_evt_handler_t handler;
+	bool is_initialized;
+} nrfs_gdfs_cb_t;
+static nrfs_gdfs_cb_t m_cb;
+
+void nrfs_gdfs_service_notify(void *p_notification, size_t size)
+{
+	if (!m_cb.handler || !m_cb.is_initialized) {
+		return;
+	}
+
+	nrfs_gdfs_evt_t evt;
+	nrfs_generic_t *p_data = (nrfs_generic_t *)p_notification;
+	if (NRFS_HDR_FILTER_ERR_GET(&p_data->hdr)) {
+		evt.type = NRFS_GDFS_EVT_REJECT;
+		m_cb.handler(&evt, (void *)p_data->ctx.ctx);
+		return;
+	}
+
+	nrfs_gdfs_rsp_t *p_rsp = (nrfs_gdfs_rsp_t *)p_notification;
+	switch (p_data->hdr.req) {
+	case NRFS_GDFS_REQ_FREQ:
+		evt.type = NRFS_GDFS_EVT_FREQ_CONFIRMED;
+		m_cb.handler(&evt, (void *)p_rsp->ctx.ctx);
+		break;
+
+	default:
+		break;
+	}
+}
+
+nrfs_err_t nrfs_gdfs_init(nrfs_gdfs_evt_handler_t handler)
+{
+	if (m_cb.is_initialized) {
+		return NRFS_ERR_INVALID_STATE;
+	}
+
+	m_cb.handler	    = handler;
+	m_cb.is_initialized = true;
+	return NRFS_SUCCESS;
+}
+
+void nrfs_gdfs_uninit(void)
+{
+	m_cb.is_initialized = false;
+}
+
+nrfs_err_t nrfs_gdfs_request_freq(enum gdfs_frequency_setting target_freq, void *p_context)
+{
+	if (!m_cb.is_initialized) {
+		return NRFS_ERR_INVALID_STATE;
+	}
+
+	nrfs_gdfs_req_t req;
+
+	NRFS_SERVICE_HDR_FILL(&req, NRFS_GDFS_REQ_FREQ);
+	req.ctx.ctx	     = (uint32_t)p_context;
+	req.data.target_freq = target_freq;
+
+	return nrfs_backend_send(&req, sizeof(req));
+}
+
+nrfs_err_t nrfs_gdfs_request_freq_no_rsp(enum gdfs_frequency_setting target_freq,
+					    void *p_context)
+{
+	if (!m_cb.is_initialized) {
+		return NRFS_ERR_INVALID_STATE;
+	}
+
+	nrfs_gdfs_req_t req;
+
+	NRFS_SERVICE_HDR_FILL(&req, NRFS_GDFS_REQ_FREQ);
+	NRFS_HDR_NO_RSP_SET(&req.hdr);
+	req.ctx.ctx	     = (uint32_t)p_context;
+	req.data.target_freq = target_freq;
+
+	return nrfs_backend_send(&req, sizeof(req));
+}