cmd: add scmi command for SCMI firmware
This command, "scmi", may provide a command line interface to various SCMI protocols. It supports at least initially SCMI base protocol and is intended mainly for debug purpose. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
This commit is contained in:
AKASHI Takahiro
Tom Rini
parent
9c07c0a4fc
commit
8055f90bd0
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@ -2559,6 +2559,15 @@ config CMD_CROS_EC
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a number of sub-commands for performing EC tasks such as
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updating its flash, accessing a small saved context area
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and talking to the I2C bus behind the EC (if there is one).
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config CMD_SCMI
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bool "Enable scmi command"
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depends on SCMI_FIRMWARE
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default n
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help
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This command provides user interfaces to several SCMI (System
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Control and Management Interface) protocols available on Arm
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platforms to manage system resources.
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endmenu
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menu "Filesystem commands"
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@ -159,6 +159,7 @@ obj-$(CONFIG_CMD_SATA) += sata.o
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obj-$(CONFIG_CMD_NVME) += nvme.o
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obj-$(CONFIG_SANDBOX) += sb.o
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obj-$(CONFIG_CMD_SF) += sf.o
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obj-$(CONFIG_CMD_SCMI) += scmi.o
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obj-$(CONFIG_CMD_SCSI) += scsi.o disk.o
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obj-$(CONFIG_CMD_SHA1SUM) += sha1sum.o
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obj-$(CONFIG_CMD_SEAMA) += seama.o
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384
cmd/scmi.c
Normal file
384
cmd/scmi.c
Normal file
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@ -0,0 +1,384 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* SCMI (System Control and Management Interface) utility command
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*
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* Copyright (c) 2023 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#include <command.h>
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#include <exports.h>
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#include <scmi_agent.h>
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#include <scmi_agent-uclass.h>
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#include <stdlib.h>
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#include <asm/types.h>
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#include <dm/device.h>
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#include <dm/uclass.h> /* uclass_get_device */
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#include <linux/bitfield.h>
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#include <linux/bitops.h>
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struct {
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enum scmi_std_protocol id;
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const char *name;
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} protocol_name[] = {
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{SCMI_PROTOCOL_ID_BASE, "Base"},
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{SCMI_PROTOCOL_ID_POWER_DOMAIN, "Power domain management"},
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{SCMI_PROTOCOL_ID_SYSTEM, "System power management"},
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{SCMI_PROTOCOL_ID_PERF, "Performance domain management"},
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{SCMI_PROTOCOL_ID_CLOCK, "Clock management"},
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{SCMI_PROTOCOL_ID_SENSOR, "Sensor management"},
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{SCMI_PROTOCOL_ID_RESET_DOMAIN, "Reset domain management"},
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{SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN, "Voltage domain management"},
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};
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/**
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* get_agent() - get SCMI agent device
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*
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* Return: Pointer to SCMI agent device on success, NULL on failure
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*/
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static struct udevice *get_agent(void)
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{
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struct udevice *agent;
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if (uclass_get_device(UCLASS_SCMI_AGENT, 0, &agent)) {
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printf("Cannot find any SCMI agent\n");
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return NULL;
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}
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return agent;
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}
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/**
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* get_base_proto() - get SCMI base protocol device
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* @agent: SCMI agent device
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*
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* Return: Pointer to SCMI base protocol device on success,
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* NULL on failure
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*/
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static struct udevice *get_base_proto(struct udevice *agent)
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{
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struct udevice *base_proto;
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if (!agent) {
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agent = get_agent();
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if (!agent)
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return NULL;
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}
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base_proto = scmi_get_protocol(agent, SCMI_PROTOCOL_ID_BASE);
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if (!base_proto) {
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printf("SCMI base protocol not found\n");
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return NULL;
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}
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return base_proto;
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}
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/**
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* get_proto_name() - get the name of SCMI protocol
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*
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* @id: SCMI Protocol ID
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*
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* Get the printable name of the protocol, @id
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*
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* Return: Name string on success, NULL on failure
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*/
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static const char *get_proto_name(enum scmi_std_protocol id)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(protocol_name); i++)
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if (id == protocol_name[i].id)
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return protocol_name[i].name;
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return NULL;
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}
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/**
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* do_scmi_info() - get the information of SCMI services
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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*
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* Get the information of SCMI services using various interfaces
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* provided by the Base protocol.
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*
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*/
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static int do_scmi_info(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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struct udevice *agent, *base_proto;
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u32 agent_id, num_protocols;
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u8 *agent_name, *protocols;
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int i, ret;
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if (argc != 1)
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return CMD_RET_USAGE;
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agent = get_agent();
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if (!agent)
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return CMD_RET_FAILURE;
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base_proto = get_base_proto(agent);
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if (!base_proto)
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return CMD_RET_FAILURE;
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printf("SCMI device: %s\n", agent->name);
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printf(" protocol version: 0x%x\n", scmi_version(agent));
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printf(" # of agents: %d\n", scmi_num_agents(agent));
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for (i = 0; i < scmi_num_agents(agent); i++) {
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ret = scmi_base_discover_agent(base_proto, i, &agent_id,
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&agent_name);
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if (ret) {
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if (ret != -EOPNOTSUPP)
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printf("base_discover_agent() failed for id: %d (%d)\n",
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i, ret);
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break;
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}
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printf(" %c%2d: %s\n", i == scmi_agent_id(agent) ? '>' : ' ',
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i, agent_name);
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free(agent_name);
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}
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printf(" # of protocols: %d\n", scmi_num_protocols(agent));
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num_protocols = scmi_num_protocols(agent);
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protocols = scmi_protocols(agent);
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if (protocols)
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for (i = 0; i < num_protocols; i++)
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printf(" %s\n", get_proto_name(protocols[i]));
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printf(" vendor: %s\n", scmi_vendor(agent));
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printf(" sub vendor: %s\n", scmi_sub_vendor(agent));
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printf(" impl version: 0x%x\n", scmi_impl_version(agent));
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return CMD_RET_SUCCESS;
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}
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/**
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* do_scmi_set_dev() - set access permission to device
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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*
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* Set access permission to device with SCMI_BASE_SET_DEVICE_PERMISSIONS
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*
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*/
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static int do_scmi_set_dev(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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u32 agent_id, device_id, flags, attributes;
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char *end;
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struct udevice *base_proto;
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int ret;
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if (argc != 4)
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return CMD_RET_USAGE;
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agent_id = simple_strtoul(argv[1], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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device_id = simple_strtoul(argv[2], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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flags = simple_strtoul(argv[3], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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base_proto = get_base_proto(NULL);
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if (!base_proto)
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return CMD_RET_FAILURE;
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ret = scmi_base_protocol_message_attrs(base_proto,
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SCMI_BASE_SET_DEVICE_PERMISSIONS,
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&attributes);
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if (ret) {
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printf("This operation is not supported\n");
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return CMD_RET_FAILURE;
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}
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ret = scmi_base_set_device_permissions(base_proto, agent_id,
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device_id, flags);
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if (ret) {
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printf("%s access to device:%u failed (%d)\n",
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flags ? "Allowing" : "Denying", device_id, ret);
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return CMD_RET_FAILURE;
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}
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return CMD_RET_SUCCESS;
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}
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/**
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* do_scmi_set_proto() - set protocol permission to device
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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*
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* Set protocol permission to device with SCMI_BASE_SET_PROTOCOL_PERMISSIONS
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*
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*/
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static int do_scmi_set_proto(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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u32 agent_id, device_id, protocol_id, flags, attributes;
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char *end;
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struct udevice *base_proto;
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int ret;
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if (argc != 5)
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return CMD_RET_USAGE;
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agent_id = simple_strtoul(argv[1], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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device_id = simple_strtoul(argv[2], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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protocol_id = simple_strtoul(argv[3], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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flags = simple_strtoul(argv[4], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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base_proto = get_base_proto(NULL);
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if (!base_proto)
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return CMD_RET_FAILURE;
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ret = scmi_base_protocol_message_attrs(base_proto,
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SCMI_BASE_SET_PROTOCOL_PERMISSIONS,
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&attributes);
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if (ret) {
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printf("This operation is not supported\n");
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return CMD_RET_FAILURE;
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}
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ret = scmi_base_set_protocol_permissions(base_proto, agent_id,
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device_id, protocol_id,
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flags);
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if (ret) {
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printf("%s access to protocol:0x%x on device:%u failed (%d)\n",
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flags ? "Allowing" : "Denying", protocol_id, device_id,
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ret);
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return CMD_RET_FAILURE;
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}
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return CMD_RET_SUCCESS;
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}
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/**
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* do_scmi_reset() - reset platform resource settings
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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*
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* Reset platform resource settings with BASE_RESET_AGENT_CONFIGURATION
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*
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*/
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static int do_scmi_reset(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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u32 agent_id, flags, attributes;
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char *end;
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struct udevice *base_proto;
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int ret;
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if (argc != 3)
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return CMD_RET_USAGE;
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agent_id = simple_strtoul(argv[1], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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flags = simple_strtoul(argv[2], &end, 16);
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if (*end != '\0')
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return CMD_RET_USAGE;
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base_proto = get_base_proto(NULL);
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if (!base_proto)
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return CMD_RET_FAILURE;
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ret = scmi_base_protocol_message_attrs(base_proto,
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SCMI_BASE_RESET_AGENT_CONFIGURATION,
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&attributes);
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if (ret) {
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printf("Reset is not supported\n");
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return CMD_RET_FAILURE;
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}
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ret = scmi_base_reset_agent_configuration(base_proto, agent_id, flags);
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if (ret) {
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printf("Reset failed (%d)\n", ret);
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return CMD_RET_FAILURE;
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}
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return CMD_RET_SUCCESS;
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}
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static struct cmd_tbl cmd_scmi_sub[] = {
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U_BOOT_CMD_MKENT(info, CONFIG_SYS_MAXARGS, 1,
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do_scmi_info, "", ""),
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U_BOOT_CMD_MKENT(perm_dev, CONFIG_SYS_MAXARGS, 1,
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do_scmi_set_dev, "", ""),
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U_BOOT_CMD_MKENT(perm_proto, CONFIG_SYS_MAXARGS, 1,
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do_scmi_set_proto, "", ""),
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U_BOOT_CMD_MKENT(reset, CONFIG_SYS_MAXARGS, 1,
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do_scmi_reset, "", ""),
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};
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/**
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* do_scmi() - SCMI utility
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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*
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* Provide user interfaces to SCMI protocols.
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*
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* Return: CMD_RET_SUCCESS on success,
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* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
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*/
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static int do_scmi(struct cmd_tbl *cmdtp, int flag,
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int argc, char *const argv[])
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{
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struct cmd_tbl *cp;
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if (argc < 2)
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return CMD_RET_USAGE;
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argc--; argv++;
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cp = find_cmd_tbl(argv[0], cmd_scmi_sub, ARRAY_SIZE(cmd_scmi_sub));
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if (!cp)
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return CMD_RET_USAGE;
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return cp->cmd(cmdtp, flag, argc, argv);
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}
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static char scmi_help_text[] =
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" - SCMI utility\n"
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" info - get the info of SCMI services\n"
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" perm_dev <agent-id in hex> <device-id in hex> <flags in hex>\n"
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" - set access permission to device\n"
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" perm_proto <agent-id in hex> <device-id in hex> <protocol-id in hex> <flags in hex>\n"
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" - set protocol permission to device\n"
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" reset <agent-id in hex> <flags in hex>\n"
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" - reset platform resource settings\n"
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"";
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U_BOOT_CMD(scmi, CONFIG_SYS_MAXARGS, 0, do_scmi, "SCMI utility",
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scmi_help_text);
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