sandbox_firmware: sandbox-firmware {
compatible = "sandbox,firmware";
};
+
+ sandbox-scmi-agent@0 {
+ compatible = "sandbox,scmi-agent";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ sandbox-scmi-agent@1 {
+ compatible = "sandbox,scmi-agent";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ protocol@10 {
+ reg = <0x10>;
+ };
+ };
};
pinctrl-gpio {
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020, Linaro Limited
+ */
+
+#ifndef __SANDBOX_SCMI_TEST_H
+#define __SANDBOX_SCMI_TEST_H
+
+struct udevice;
+struct sandbox_scmi_agent;
+struct sandbox_scmi_service;
+
+/**
+ * struct sandbox_scmi_agent - Simulated SCMI service seen by SCMI agent
+ * @idx: Identifier for the SCMI agent, its index
+ */
+struct sandbox_scmi_agent {
+ uint idx;
+};
+
+/**
+ * struct sandbox_scmi_service - Reference to simutaed SCMI agents/services
+ * @agent: Pointer to SCMI sandbox agent pointers array
+ * @agent_count: Number of emulated agents exposed in array @agent.
+ */
+struct sandbox_scmi_service {
+ struct sandbox_scmi_agent **agent;
+ size_t agent_count;
+};
+
+#ifdef CONFIG_SCMI_FIRMWARE
+/**
+ * sandbox_scmi_service_context - Get the simulated SCMI services context
+ * @return: Reference to backend simulated resources state
+ */
+struct sandbox_scmi_service *sandbox_scmi_service_ctx(void);
+#else
+static inline struct sandbox_scmi_service *sandbox_scmi_service_ctx(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_SCMI_FIRMWARE */
+#endif /* __SANDBOX_SCMI_TEST_H */
CONFIG_DMA=y
CONFIG_DMA_CHANNELS=y
CONFIG_SANDBOX_DMA=y
+CONFIG_FIRMWARE=y
+CONFIG_SCMI_FIRMWARE=y
CONFIG_GPIO_HOG=y
CONFIG_DM_GPIO_LOOKUP_LABEL=y
CONFIG_PM8916_GPIO=y
various platform management services.
Say yes to enable ZynqMP firmware interface driver.
If in doubt, say N.
+
+source "drivers/firmware/scmi/Kconfig"
obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o
obj-$(CONFIG_SANDBOX) += firmware-sandbox.o
obj-$(CONFIG_ZYNQMP_FIRMWARE) += firmware-zynqmp.o
+obj-$(CONFIG_SCMI_FIRMWARE) += scmi/
--- /dev/null
+config SCMI_FIRMWARE
+ bool "Enable SCMI support"
+ select FIRMWARE
+ select OF_TRANSLATE
+ depends on SANDBOX
+ help
+ System Control and Management Interface (SCMI) is a communication
+ protocol that defines standard interfaces for power, performance
+ and system management. The SCMI specification is available at
+ https://developer.arm.com/architectures/system-architectures/software-standards/scmi
+
+ An SCMI agent communicates with a related SCMI server firmware
+ located in another sub-system, as a companion micro controller
+ or a companion host in the CPU system.
+
+ Communications between agent (client) and the SCMI server are
+ based on message exchange.
--- /dev/null
+obj-y += scmi_agent-uclass.o
+obj-$(CONFIG_SANDBOX) += sandbox-scmi_agent.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020, Linaro Limited
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <malloc.h>
+#include <scmi_agent.h>
+#include <scmi_agent-uclass.h>
+#include <scmi_protocols.h>
+#include <asm/io.h>
+#include <asm/scmi_test.h>
+#include <dm/device_compat.h>
+
+/*
+ * The sandbox SCMI agent driver simulates to some extend a SCMI message
+ * processing. It simulates few of the SCMI services for some of the
+ * SCMI protocols embedded in U-Boot. Currently none.
+ *
+ * This driver simulates 2 SCMI agents for test purpose.
+ *
+ * This Driver exports sandbox_scmi_service_ct() for the test sequence to
+ * get the state of the simulated services (clock state, rate, ...) and
+ * check back-end device state reflects the request send through the
+ * various uclass devices, currently nothing.
+ */
+
+#define SANDBOX_SCMI_AGENT_COUNT 2
+
+/* The list saves to simulted end devices references for test purpose */
+struct sandbox_scmi_agent *sandbox_scmi_agent_list[SANDBOX_SCMI_AGENT_COUNT];
+
+static struct sandbox_scmi_service sandbox_scmi_service_state = {
+ .agent = sandbox_scmi_agent_list,
+ .agent_count = SANDBOX_SCMI_AGENT_COUNT,
+};
+
+struct sandbox_scmi_service *sandbox_scmi_service_ctx(void)
+{
+ return &sandbox_scmi_service_state;
+}
+
+static void debug_print_agent_state(struct udevice *dev, char *str)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+
+ dev_dbg(dev, "Dump sandbox_scmi_agent %u: %s\n", agent->idx, str);
+};
+
+static int sandbox_scmi_test_process_msg(struct udevice *dev,
+ struct scmi_msg *msg)
+{
+ switch (msg->protocol_id) {
+ case SCMI_PROTOCOL_ID_BASE:
+ case SCMI_PROTOCOL_ID_POWER_DOMAIN:
+ case SCMI_PROTOCOL_ID_SYSTEM:
+ case SCMI_PROTOCOL_ID_PERF:
+ case SCMI_PROTOCOL_ID_CLOCK:
+ case SCMI_PROTOCOL_ID_SENSOR:
+ case SCMI_PROTOCOL_ID_RESET_DOMAIN:
+ *(u32 *)msg->out_msg = SCMI_NOT_SUPPORTED;
+ return 0;
+ default:
+ break;
+ }
+
+ dev_err(dev, "%s(%s): Unhandled protocol_id %#x/message_id %#x\n",
+ __func__, dev->name, msg->protocol_id, msg->message_id);
+
+ if (msg->out_msg_sz < sizeof(u32))
+ return -EINVAL;
+
+ /* Intentionnaly report unhandled IDs through the SCMI return code */
+ *(u32 *)msg->out_msg = SCMI_PROTOCOL_ERROR;
+ return 0;
+}
+
+static int sandbox_scmi_test_remove(struct udevice *dev)
+{
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+
+ debug_print_agent_state(dev, "removed");
+
+ /* We only need to dereference the agent in the context */
+ sandbox_scmi_service_ctx()->agent[agent->idx] = NULL;
+
+ return 0;
+}
+
+static int sandbox_scmi_test_probe(struct udevice *dev)
+{
+ static const char basename[] = "sandbox-scmi-agent@";
+ struct sandbox_scmi_agent *agent = dev_get_priv(dev);
+ const size_t basename_size = sizeof(basename) - 1;
+
+ if (strncmp(basename, dev->name, basename_size))
+ return -ENOENT;
+
+ switch (dev->name[basename_size]) {
+ case '0':
+ *agent = (struct sandbox_scmi_agent){
+ .idx = 0,
+ };
+ break;
+ case '1':
+ *agent = (struct sandbox_scmi_agent){
+ .idx = 1,
+ };
+ break;
+ default:
+ dev_err(dev, "%s(): Unexpected agent ID %s\n",
+ __func__, dev->name + basename_size);
+ return -ENOENT;
+ }
+
+ debug_print_agent_state(dev, "probed");
+
+ /* Save reference for tests purpose */
+ sandbox_scmi_service_ctx()->agent[agent->idx] = agent;
+
+ return 0;
+};
+
+static const struct udevice_id sandbox_scmi_test_ids[] = {
+ { .compatible = "sandbox,scmi-agent" },
+ { }
+};
+
+struct scmi_agent_ops sandbox_scmi_test_ops = {
+ .process_msg = sandbox_scmi_test_process_msg,
+};
+
+U_BOOT_DRIVER(sandbox_scmi_agent) = {
+ .name = "sandbox-scmi_agent",
+ .id = UCLASS_SCMI_AGENT,
+ .of_match = sandbox_scmi_test_ids,
+ .priv_auto_alloc_size = sizeof(struct sandbox_scmi_agent),
+ .probe = sandbox_scmi_test_probe,
+ .remove = sandbox_scmi_test_remove,
+ .ops = &sandbox_scmi_test_ops,
+};
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Linaro Limited.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <scmi_agent-uclass.h>
+#include <scmi_protocols.h>
+
+#include <dm/device-internal.h>
+#include <linux/compat.h>
+
+/**
+ * struct error_code - Helper structure for SCMI error code conversion
+ * @scmi: SCMI error code
+ * @errno: Related standard error number
+ */
+struct error_code {
+ int scmi;
+ int errno;
+};
+
+static const struct error_code scmi_linux_errmap[] = {
+ { .scmi = SCMI_NOT_SUPPORTED, .errno = -EOPNOTSUPP, },
+ { .scmi = SCMI_INVALID_PARAMETERS, .errno = -EINVAL, },
+ { .scmi = SCMI_DENIED, .errno = -EACCES, },
+ { .scmi = SCMI_NOT_FOUND, .errno = -ENOENT, },
+ { .scmi = SCMI_OUT_OF_RANGE, .errno = -ERANGE, },
+ { .scmi = SCMI_BUSY, .errno = -EBUSY, },
+ { .scmi = SCMI_COMMS_ERROR, .errno = -ECOMM, },
+ { .scmi = SCMI_GENERIC_ERROR, .errno = -EIO, },
+ { .scmi = SCMI_HARDWARE_ERROR, .errno = -EREMOTEIO, },
+ { .scmi = SCMI_PROTOCOL_ERROR, .errno = -EPROTO, },
+};
+
+int scmi_to_linux_errno(s32 scmi_code)
+{
+ int n;
+
+ if (!scmi_code)
+ return 0;
+
+ for (n = 0; n < ARRAY_SIZE(scmi_linux_errmap); n++)
+ if (scmi_code == scmi_linux_errmap[n].scmi)
+ return scmi_linux_errmap[1].errno;
+
+ return -EPROTO;
+}
+
+/*
+ * SCMI agent devices binds devices of various uclasses depeding on
+ * the FDT description. scmi_bind_protocol() is a generic bind sequence
+ * called by the uclass at bind stage, that is uclass post_bind.
+ */
+static int scmi_bind_protocols(struct udevice *dev)
+{
+ int ret = 0;
+ ofnode node;
+ struct driver *drv;
+
+ dev_for_each_subnode(node, dev) {
+ u32 protocol_id;
+
+ if (!ofnode_is_available(node))
+ continue;
+
+ if (ofnode_read_u32(node, "reg", &protocol_id))
+ continue;
+
+ switch (protocol_id) {
+ default:
+ dev_info(dev, "Ignore unsupported SCMI protocol %#x\n",
+ protocol_id);
+ continue;
+ }
+
+ ret = device_bind_ofnode(dev, drv, ofnode_get_name(node),
+ NULL, node, NULL);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+static const struct scmi_agent_ops *transport_dev_ops(struct udevice *dev)
+{
+ return (const struct scmi_agent_ops *)dev->driver->ops;
+}
+
+int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg)
+{
+ const struct scmi_agent_ops *ops = transport_dev_ops(dev);
+
+ if (ops->process_msg)
+ return ops->process_msg(dev, msg);
+
+ return -EPROTONOSUPPORT;
+}
+
+UCLASS_DRIVER(scmi_agent) = {
+ .id = UCLASS_SCMI_AGENT,
+ .name = "scmi_agent",
+ .post_bind = scmi_bind_protocols,
+};
UCLASS_RESET, /* Reset controller device */
UCLASS_RNG, /* Random Number Generator */
UCLASS_RTC, /* Real time clock device */
+ UCLASS_SCMI_AGENT, /* Interface with an SCMI server */
UCLASS_SCSI, /* SCSI device */
UCLASS_SERIAL, /* Serial UART */
UCLASS_SIMPLE_BUS, /* Bus with child devices */
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019-2020 Linaro Limited.
+ */
+#ifndef _SCMI_AGENT_UCLASS_H
+#define _SCMI_AGENT_UCLASS_H
+
+struct udevice;
+struct scmi_msg;
+
+/**
+ * struct scmi_transport_ops - The functions that a SCMI transport layer must implement.
+ */
+struct scmi_agent_ops {
+ /*
+ * process_msg - Request transport to get the SCMI message processed
+ *
+ * @agent: Agent using the transport
+ * @msg: SCMI message to be transmitted
+ */
+ int (*process_msg)(struct udevice *dev, struct scmi_msg *msg);
+};
+
+#endif /* _SCMI_TRANSPORT_UCLASS_H */
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved.
+ * Copyright (C) 2019-2020, Linaro Limited
+ *
+ * An SCMI agent device represent on communication path from a
+ * device driver to the remote SCMI server which driver sends
+ * messages to and receives response messages from.
+ */
+#ifndef SCMI_AGENT_H
+#define SCMI_AGENT_H
+
+#include <asm/types.h>
+
+struct udevice;
+
+/*
+ * struct scmi_msg - Context of a SCMI message sent and the response received
+ *
+ * @protocol_id: SCMI protocol ID
+ * @message_id: SCMI message ID for a defined protocol ID
+ * @in_msg: Pointer to the message payload sent by the driver
+ * @in_msg_sz: Byte size of the message payload sent
+ * @out_msg: Pointer to buffer to store response message payload
+ * @out_msg_sz: Byte size of the response buffer and response payload
+ */
+struct scmi_msg {
+ unsigned int protocol_id;
+ unsigned int message_id;
+ u8 *in_msg;
+ size_t in_msg_sz;
+ u8 *out_msg;
+ size_t out_msg_sz;
+};
+
+/* Helper macro to match a message on input/output array references */
+#define SCMI_MSG_IN(_protocol, _message, _in_array, _out_array) \
+ (struct scmi_msg){ \
+ .protocol_id = (_protocol), \
+ .message_id = (_message), \
+ .in_msg = (uint8_t *)&(_in_array), \
+ .in_msg_sz = sizeof(_in_array), \
+ .out_msg = (uint8_t *)&(_out_array), \
+ .out_msg_sz = sizeof(_out_array), \
+ }
+
+/**
+ * scmi_send_and_process_msg() - send and process a SCMI message
+ *
+ * Send a message to a SCMI server through a target SCMI agent device.
+ * Caller sets scmi_msg::out_msg_sz to the output message buffer size.
+ * On return, scmi_msg::out_msg_sz stores the response payload size.
+ *
+ * @dev: SCMI agent device
+ * @msg: Message structure reference
+ * @return 0 on success and a negative errno on failure
+ */
+int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg);
+
+/**
+ * scmi_to_linux_errno() - Convert an SCMI error code into a Linux errno code
+ *
+ * @scmi_errno: SCMI error code value
+ * @return 0 for successful status and a negative errno otherwise
+ */
+int scmi_to_linux_errno(s32 scmi_errno);
+
+#endif /* SCMI_H */
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved.
+ * Copyright (C) 2019-2020, Linaro Limited
+ */
+#ifndef _SCMI_PROTOCOLS_H
+#define _SCMI_PROTOCOLS_H
+
+#include <linux/bitops.h>
+
+/*
+ * Subset the SCMI protocols definition
+ * based on SCMI specification v2.0 (DEN0056B)
+ * https://developer.arm.com/docs/den0056/b
+ */
+
+enum scmi_std_protocol {
+ SCMI_PROTOCOL_ID_BASE = 0x10,
+ SCMI_PROTOCOL_ID_POWER_DOMAIN = 0x11,
+ SCMI_PROTOCOL_ID_SYSTEM = 0x12,
+ SCMI_PROTOCOL_ID_PERF = 0x13,
+ SCMI_PROTOCOL_ID_CLOCK = 0x14,
+ SCMI_PROTOCOL_ID_SENSOR = 0x15,
+ SCMI_PROTOCOL_ID_RESET_DOMAIN = 0x16,
+};
+
+enum scmi_status_code {
+ SCMI_SUCCESS = 0,
+ SCMI_NOT_SUPPORTED = -1,
+ SCMI_INVALID_PARAMETERS = -2,
+ SCMI_DENIED = -3,
+ SCMI_NOT_FOUND = -4,
+ SCMI_OUT_OF_RANGE = -5,
+ SCMI_BUSY = -6,
+ SCMI_COMMS_ERROR = -7,
+ SCMI_GENERIC_ERROR = -8,
+ SCMI_HARDWARE_ERROR = -9,
+ SCMI_PROTOCOL_ERROR = -10,
+};
+
+#endif /* _SCMI_PROTOCOLS_H */
obj-$(CONFIG_CLK_K210_SET_RATE) += k210_pll.o
obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o
obj-$(CONFIG_RESET_SYSCON) += syscon-reset.o
+obj-$(CONFIG_SCMI_FIRMWARE) += scmi.o
endif
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020, Linaro Limited
+ *
+ * Tests scmi_agent uclass and the SCMI drivers implemented in other
+ * uclass devices probe when a SCMI server exposes resources.
+ *
+ * Note in test.dts the protocol@10 node in agent 1. Protocol 0x10 is not
+ * implemented in U-Boot SCMI components but the implementation is exepected
+ * to not complain on unknown protocol IDs, as long as it is not used. Note
+ * in test.dts tests that SCMI drivers probing does not fail for such an
+ * unknown SCMI protocol ID.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/scmi_test.h>
+#include <dm/device-internal.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+/*
+ * Test SCMI states when loading and releasing resources
+ * related to SCMI drivers.
+ */
+static int dm_test_scmi_sandbox_agent(struct unit_test_state *uts)
+{
+ struct sandbox_scmi_service *scmi_ctx = sandbox_scmi_service_ctx();
+
+ ut_assertnonnull(scmi_ctx);
+ ut_asserteq(2, scmi_ctx->agent_count);
+ ut_assertnull(scmi_ctx->agent[0]);
+ ut_assertnull(scmi_ctx->agent[1]);
+
+ return 0;
+}
+
+DM_TEST(dm_test_scmi_sandbox_agent, UT_TESTF_SCAN_FDT);
projects / u-boot.git / commitdiff