Adding upstream version 2.10.0+dfsg.upstream/2.10.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/drivers/scmi-msg/base.c b/drivers/scmi-msg/base.c
new file mode 100644
index 0000000..52502a5
--- /dev/null
+++ b/drivers/scmi-msg/base.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2019-2022, Linaro Limited
+ */
+#include <assert.h>
+#include <string.h>
+
+#include <drivers/scmi-msg.h>
+#include <drivers/scmi.h>
+#include <lib/utils.h>
+#include <lib/utils_def.h>
+
+#include "common.h"
+
+static bool message_id_is_supported(unsigned int message_id);
+
+static void report_version(struct scmi_msg *msg)
+{
+	struct scmi_protocol_version_p2a return_values = {
+		.status = SCMI_SUCCESS,
+		.version = SCMI_PROTOCOL_VERSION_BASE,
+	};
+
+	if (msg->in_size != 0U) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static void report_attributes(struct scmi_msg *msg)
+{
+	size_t protocol_count = plat_scmi_protocol_count();
+	struct scmi_protocol_attributes_p2a return_values = {
+		.status = SCMI_SUCCESS,
+		/* Null agent count since agent discovery is not supported */
+		.attributes = SCMI_BASE_PROTOCOL_ATTRIBUTES(protocol_count, 0U),
+	};
+
+	if (msg->in_size != 0U) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static void report_message_attributes(struct scmi_msg *msg)
+{
+	struct scmi_protocol_message_attributes_a2p *in_args = (void *)msg->in;
+	struct scmi_protocol_message_attributes_p2a return_values = {
+		.status = SCMI_SUCCESS,
+		/* For this protocol, attributes shall be zero */
+		.attributes = 0U,
+	};
+
+	if (msg->in_size != sizeof(*in_args)) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	if (!message_id_is_supported(in_args->message_id)) {
+		scmi_status_response(msg, SCMI_NOT_FOUND);
+		return;
+	}
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static void discover_vendor(struct scmi_msg *msg)
+{
+	const char *name = plat_scmi_vendor_name();
+	struct scmi_base_discover_vendor_p2a return_values = {
+		.status = SCMI_SUCCESS,
+	};
+
+	if (msg->in_size != 0U) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	COPY_NAME_IDENTIFIER(return_values.vendor_identifier, name);
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static void discover_sub_vendor(struct scmi_msg *msg)
+{
+	const char *name = plat_scmi_sub_vendor_name();
+	struct scmi_base_discover_sub_vendor_p2a return_values = {
+		.status = SCMI_SUCCESS,
+	};
+
+	if (msg->in_size != 0U) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	COPY_NAME_IDENTIFIER(return_values.sub_vendor_identifier, name);
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static void discover_implementation_version(struct scmi_msg *msg)
+{
+	struct scmi_protocol_version_p2a return_values = {
+		.status = SCMI_SUCCESS,
+		.version = SCMI_IMPL_VERSION,
+	};
+
+	if (msg->in_size != 0U) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	scmi_write_response(msg, &return_values, sizeof(return_values));
+}
+
+static unsigned int count_protocols_in_list(const uint8_t *protocol_list)
+{
+	unsigned int count = 0U;
+
+	if (protocol_list != NULL) {
+		while (protocol_list[count] != 0U) {
+			count++;
+		}
+	}
+
+	return count;
+}
+
+static void discover_list_protocols(struct scmi_msg *msg)
+{
+	const struct scmi_base_discover_list_protocols_a2p *a2p = NULL;
+	struct scmi_base_discover_list_protocols_p2a p2a = {
+		.status = SCMI_SUCCESS,
+	};
+	const uint8_t *list = NULL;
+	unsigned int count = 0U;
+
+	if (msg->in_size != sizeof(*a2p)) {
+		scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
+		return;
+	}
+
+	a2p = (void *)msg->in;
+
+	list = plat_scmi_protocol_list(msg->agent_id);
+	count = count_protocols_in_list(list);
+
+	if (count > a2p->skip) {
+		count = MIN((uint32_t)(count - a2p->skip),
+			    (uint32_t)(msg->out_size - sizeof(p2a)));
+	} else {
+		count = 0U;
+	}
+
+	p2a.num_protocols = count;
+
+	memcpy(msg->out, &p2a, sizeof(p2a));
+	memcpy(msg->out + sizeof(p2a), list + a2p->skip, count);
+	msg->out_size_out = sizeof(p2a) + round_up(count, sizeof(uint32_t));
+}
+
+static const scmi_msg_handler_t scmi_base_handler_table[] = {
+	[SCMI_PROTOCOL_VERSION] = report_version,
+	[SCMI_PROTOCOL_ATTRIBUTES] = report_attributes,
+	[SCMI_PROTOCOL_MESSAGE_ATTRIBUTES] = report_message_attributes,
+	[SCMI_BASE_DISCOVER_VENDOR] = discover_vendor,
+	[SCMI_BASE_DISCOVER_SUB_VENDOR] = discover_sub_vendor,
+	[SCMI_BASE_DISCOVER_IMPLEMENTATION_VERSION] =
+					discover_implementation_version,
+	[SCMI_BASE_DISCOVER_LIST_PROTOCOLS] = discover_list_protocols,
+};
+
+static bool message_id_is_supported(unsigned int message_id)
+{
+	return (message_id < ARRAY_SIZE(scmi_base_handler_table)) &&
+	       (scmi_base_handler_table[message_id] != NULL);
+}
+
+scmi_msg_handler_t scmi_msg_get_base_handler(struct scmi_msg *msg)
+{
+	unsigned int message_id = SPECULATION_SAFE_VALUE(msg->message_id);
+
+	if (message_id >= ARRAY_SIZE(scmi_base_handler_table)) {
+		VERBOSE("Base handle not found %u\n", msg->message_id);
+		return NULL;
+	}
+
+	return scmi_base_handler_table[message_id];
+}