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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Sudeep Holla
e659fc8e53
Move the FF-A core bring-up and teardown paths into platform driver probe and remove callbacks, and register a synthetic arm-ffa platform device to bind the driver. This makes the FF-A core lifetime follow the driver model while keeping the device creation internal to the FF-A core. Use normal platform driver registration so the probe path has standard driver-core semantics. The synthetic platform device is a temporary bridge until ACPI and devicetree describe the FF-A core device or object. Once those firmware description paths are defined, the internal platform device creation can be dropped and the driver can bind to the firmware-described device directly. Since the transport selection now happens from the platform probe path, drop the __init annotation from ffa_transport_init(). Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com> Link: https://patch.msgid.link/20260508-b4-ffa_plat_dev-v1-2-c5a30f8cf7b8@kernel.org Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
40 lines
776 B
C
40 lines
776 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2021 ARM Ltd.
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*/
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#include <linux/printk.h>
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#include "common.h"
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static void __arm_ffa_fn_smc(ffa_value_t args, ffa_value_t *res)
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{
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arm_smccc_1_2_smc(&args, res);
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}
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static void __arm_ffa_fn_hvc(ffa_value_t args, ffa_value_t *res)
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{
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arm_smccc_1_2_hvc(&args, res);
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}
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int ffa_transport_init(ffa_fn **invoke_ffa_fn)
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{
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enum arm_smccc_conduit conduit;
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if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2)
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return -EOPNOTSUPP;
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conduit = arm_smccc_1_1_get_conduit();
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if (conduit == SMCCC_CONDUIT_NONE) {
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pr_err("%s: invalid SMCCC conduit\n", __func__);
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return -EOPNOTSUPP;
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}
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if (conduit == SMCCC_CONDUIT_SMC)
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*invoke_ffa_fn = __arm_ffa_fn_smc;
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else
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*invoke_ffa_fn = __arm_ffa_fn_hvc;
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return 0;
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}
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