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111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
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*
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* Authors:
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* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
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*/
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#include <common.h>
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#include <arm_ffa.h>
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#include <dm.h>
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#include <log.h>
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#include <asm/global_data.h>
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#include <asm/sandbox_arm_ffa_priv.h>
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#include <dm/device-internal.h>
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#include <linux/errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* sandbox_ffa_discover() - perform sandbox FF-A discovery
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* @dev: The sandbox FF-A bus device
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* Try to discover the FF-A framework. Discovery is performed by
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* querying the FF-A framework version from secure world using the FFA_VERSION ABI.
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* Return:
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*
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* 0 on success. Otherwise, failure
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*/
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static int sandbox_ffa_discover(struct udevice *dev)
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{
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int ret;
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struct udevice *emul;
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log_info("Emulated FF-A framework discovery\n");
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ret = ffa_emul_find(dev, &emul);
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if (ret) {
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log_err("Cannot find FF-A emulator\n");
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return ret;
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}
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ret = ffa_get_version_hdlr(dev);
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if (ret)
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return ret;
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return 0;
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}
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/**
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* sandbox_ffa_probe() - The sandbox FF-A driver probe function
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* @dev: the sandbox-arm-ffa device
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* Save the emulator device in uc_priv.
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* Return:
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*
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* 0 on success.
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*/
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static int sandbox_ffa_probe(struct udevice *dev)
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{
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int ret;
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struct ffa_priv *uc_priv = dev_get_uclass_priv(dev);
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ret = uclass_first_device_err(UCLASS_FFA_EMUL, &uc_priv->emul);
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if (ret) {
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log_err("Cannot find FF-A emulator\n");
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return ret;
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}
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return 0;
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}
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/**
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* sandbox_ffa_bind() - The sandbox FF-A driver bind function
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* @dev: the sandbox-arm-ffa device
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* Try to discover the emulated FF-A bus.
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* Return:
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*
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* 0 on success.
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*/
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static int sandbox_ffa_bind(struct udevice *dev)
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{
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int ret;
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ret = sandbox_ffa_discover(dev);
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if (ret)
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return ret;
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return 0;
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}
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/* Sandbox Arm FF-A emulator operations */
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static const struct ffa_bus_ops sandbox_ffa_ops = {
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.partition_info_get = ffa_get_partitions_info_hdlr,
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.sync_send_receive = ffa_msg_send_direct_req_hdlr,
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.rxtx_unmap = ffa_unmap_rxtx_buffers_hdlr,
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};
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static const struct udevice_id sandbox_ffa_id[] = {
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{ "sandbox,arm-ffa", 0 },
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{ },
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};
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/* Declaring the sandbox FF-A driver under UCLASS_FFA */
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U_BOOT_DRIVER(sandbox_arm_ffa) = {
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.name = "sandbox_arm_ffa",
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.of_match = sandbox_ffa_id,
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.id = UCLASS_FFA,
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.bind = sandbox_ffa_bind,
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.probe = sandbox_ffa_probe,
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.ops = &sandbox_ffa_ops,
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};
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