The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=5ea251c4ed6e511050037db62600ddf815b623d2
commit 5ea251c4ed6e511050037db62600ddf815b623d2 Author: Andrew Turner <[email protected]> AuthorDate: 2023-10-04 13:00:50 +0000 Commit: Andrew Turner <[email protected]> CommitDate: 2024-04-11 09:58:56 +0000 scmi: Add an SCMI SMC transport driver Using the SCMI transport interface add a new SMC transport to the SCMI stack. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D43040 --- sys/conf/files.arm64 | 1 + sys/dev/firmware/arm/scmi_smc.c | 131 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64 index 5541a18af659..a22ffa2b7f0c 100644 --- a/sys/conf/files.arm64 +++ b/sys/conf/files.arm64 @@ -274,6 +274,7 @@ dev/firmware/arm/scmi.c optional fdt scmi dev/firmware/arm/scmi_clk.c optional fdt scmi dev/firmware/arm/scmi_if.m optional fdt scmi dev/firmware/arm/scmi_mailbox.c optional fdt scmi +dev/firmware/arm/scmi_smc.c optional fdt scmi dev/firmware/arm/scmi_shmem.c optional fdt scmi dev/gpio/pl061.c optional pl061 gpio diff --git a/sys/dev/firmware/arm/scmi_smc.c b/sys/dev/firmware/arm/scmi_smc.c new file mode 100644 index 000000000000..ff5f4a2d1491 --- /dev/null +++ b/sys/dev/firmware/arm/scmi_smc.c @@ -0,0 +1,131 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2022 Ruslan Bukin <[email protected]> + * Copyright (c) 2023 Arm Ltd + * + * This work was supported by Innovate UK project 105694, "Digital Security + * by Design (DSbD) Technology Platform Prototype". + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/cpu.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/module.h> +#include <sys/mutex.h> + +#include <dev/fdt/simplebus.h> +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <dev/psci/smccc.h> + +#include "scmi.h" +#include "scmi_protocols.h" + +struct scmi_smc_softc { + struct scmi_softc base; + uint32_t smc_id; +}; + +static int +scmi_smc_xfer_msg(device_t dev) +{ + struct scmi_smc_softc *sc; + + sc = device_get_softc(dev); + SCMI_ASSERT_LOCKED(&sc->base); + + arm_smccc_smc(sc->smc_id, 0, 0, 0, 0, 0, 0, 0, NULL); + + return (0); +} + +static int +scmi_smc_probe(device_t dev) +{ + + if (!ofw_bus_is_compatible(dev, "arm,scmi-smc")) + return (ENXIO); + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + device_set_desc(dev, "ARM SCMI SCM interface driver"); + + return (BUS_PROBE_DEFAULT); +} + +static int +scmi_smc_attach(device_t dev) +{ + struct scmi_smc_softc *sc; + phandle_t node; + ssize_t len; + + sc = device_get_softc(dev); + + node = ofw_bus_get_node(dev); + len = OF_getencprop(node, "arm,smc-id", &sc->smc_id, + sizeof(sc->smc_id)); + if (len <= 0) { + device_printf(dev, "No SMC ID found\n"); + return (EINVAL); + } + + device_printf(dev, "smc id %x\n", sc->smc_id); + + return (scmi_attach(dev)); +} + +static int +scmi_smc_detach(device_t dev) +{ + + return (0); +} + +static device_method_t scmi_smc_methods[] = { + DEVMETHOD(device_probe, scmi_smc_probe), + DEVMETHOD(device_attach, scmi_smc_attach), + DEVMETHOD(device_detach, scmi_smc_detach), + + /* SCMI interface */ + DEVMETHOD(scmi_xfer_msg, scmi_smc_xfer_msg), + + DEVMETHOD_END +}; + +DEFINE_CLASS_1(scmi_smc, scmi_smc_driver, scmi_smc_methods, + sizeof(struct scmi_smc_softc), scmi_driver); + +/* Needs to be after the mmio_sram driver */ +EARLY_DRIVER_MODULE(scmi_smc, simplebus, scmi_smc_driver, 0, 0, + BUS_PASS_SUPPORTDEV + BUS_PASS_ORDER_LATE); +MODULE_VERSION(scmi_smc, 1);
