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38df94422b
The carray referencing these definitions assumes they are const. Fixes:6a26726e08("lib/utils: reset: Add RPMI System Reset driver") Fixes:13f55f33a1("lib: utils/suspend: Add RPMI system suspend driver") Fixes:33ee9b8240("lib: utils/hsm: Add RPMI HSM driver") Fixes:591a98bdd5("lib: utils/cppc: Add RPMI CPPC driver") Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 Ventana Micro Systems Inc.
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*
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* Authors:
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* Rahul Pathak <rpathak@ventanamicro.com>
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*/
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_console.h>
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#include <sbi_utils/fdt/fdt_driver.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/mailbox/fdt_mailbox.h>
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#include <sbi_utils/mailbox/rpmi_msgprot.h>
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#include <sbi_utils/mailbox/rpmi_mailbox.h>
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/* struct rpmi_sysreset: RPMI System Reset Context */
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struct rpmi_sysreset {
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int warm_reset_support;
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struct mbox_chan *chan;
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};
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static struct rpmi_sysreset sysreset_ctx;
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static int rpmi_system_reset_type_check(u32 reset_type)
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{
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int ret;
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struct rpmi_sysrst_get_reset_attributes_resp resp;
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ret = rpmi_normal_request_with_status(sysreset_ctx.chan,
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RPMI_SYSRST_SRV_GET_ATTRIBUTES, &reset_type,
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rpmi_u32_count(reset_type), rpmi_u32_count(reset_type),
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&resp, rpmi_u32_count(resp), rpmi_u32_count(resp));
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if (ret) {
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return 0;
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}
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return (resp.flags & RPMI_SYSRST_ATTRS_FLAGS_RESETTYPE_MASK) ? 1 : 0;
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}
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/**
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* rpmi_do_system_reset: Do system reset
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*
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* @reset_type: RPMI System Reset Type
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*/
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static void rpmi_do_system_reset(u32 reset_type)
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{
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int ret;
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ret = rpmi_posted_request(sysreset_ctx.chan,
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RPMI_SYSRST_SRV_SYSTEM_RESET,
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&reset_type, rpmi_u32_count(reset_type),
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rpmi_u32_count(reset_type));
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if (ret)
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sbi_printf("system reset failed [type: %d]: ret: %d\n",
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reset_type, ret);
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}
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/**
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* rpmi_system_reset_check: Check the support for
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* various reset types
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*
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* @type: SBI System Reset Type
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* @reason: Reason for system reset
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*/
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static int rpmi_system_reset_check(u32 type, u32 reason)
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{
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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return 1;
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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return sysreset_ctx.warm_reset_support;
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default:
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return 0;
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}
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}
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static void rpmi_system_reset(u32 type, u32 reason)
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{
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u32 reset_type;
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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reset_type = RPMI_SYSRST_TYPE_SHUTDOWN;
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break;
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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reset_type = RPMI_SYSRST_TYPE_COLD_REBOOT;
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break;
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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reset_type = RPMI_SYSRST_TYPE_WARM_REBOOT;
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break;
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default:
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return;
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}
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rpmi_do_system_reset(reset_type);
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}
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static struct sbi_system_reset_device rpmi_reset_dev = {
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.name = "rpmi-system-reset",
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.system_reset_check = rpmi_system_reset_check,
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.system_reset = rpmi_system_reset,
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};
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static int rpmi_reset_init(const void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int ret;
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/* If channel already available then do nothing. */
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if (sysreset_ctx.chan)
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return 0;
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/*
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* If channel request failed then other end does not support
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* system reset group so do nothing.
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*/
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ret = fdt_mailbox_request_chan(fdt, nodeoff, 0, &sysreset_ctx.chan);
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if (ret)
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return SBI_ENODEV;
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sysreset_ctx.warm_reset_support =
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rpmi_system_reset_type_check(RPMI_SYSRST_TYPE_WARM_REBOOT);
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sbi_system_reset_add_device(&rpmi_reset_dev);
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return SBI_OK;
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}
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static const struct fdt_match rpmi_reset_match[] = {
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{ .compatible = "riscv,rpmi-system-reset" },
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{},
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};
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const struct fdt_driver fdt_reset_rpmi = {
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.match_table = rpmi_reset_match,
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.init = rpmi_reset_init,
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.experimental = true,
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};
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