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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>
140 lines
3.1 KiB
C
140 lines
3.1 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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* Subrahmanya Lingappa <slingappa@ventanamicro.com>
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*/
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#include <libfdt.h>
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#include <sbi/sbi_system.h>
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#include <sbi/riscv_asm.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/mailbox.h>
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#include <sbi_utils/mailbox/rpmi_mailbox.h>
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struct rpmi_syssusp {
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struct mbox_chan *chan;
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bool cust_res_addr_supported;
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bool suspend_supported;
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};
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static struct rpmi_syssusp syssusp_ctx;
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static int rpmi_syssusp_attrs(uint32_t *attrs)
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{
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int rc;
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struct rpmi_syssusp_get_attr_resp resp;
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struct rpmi_syssusp_get_attr_req req;
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req.susp_type = SBI_SUSP_SLEEP_TYPE_SUSPEND;
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rc = rpmi_normal_request_with_status(
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syssusp_ctx.chan, RPMI_SYSSUSP_SRV_GET_ATTRIBUTES,
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&req, rpmi_u32_count(req), rpmi_u32_count(req),
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&resp, rpmi_u32_count(resp), rpmi_u32_count(resp));
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if (rc)
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return rc;
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*attrs = resp.flags;
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return 0;
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}
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static int rpmi_syssusp(uint32_t suspend_type, ulong resume_addr)
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{
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int rc;
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struct rpmi_syssusp_suspend_req req;
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struct rpmi_syssusp_suspend_resp resp;
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req.hartid = current_hartid();
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req.suspend_type = suspend_type;
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req.resume_addr_lo = resume_addr;
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req.resume_addr_hi = (u64)resume_addr >> 32;
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rc = rpmi_normal_request_with_status(
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syssusp_ctx.chan, RPMI_SYSSUSP_SRV_SYSTEM_SUSPEND,
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&req, rpmi_u32_count(req), rpmi_u32_count(req),
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&resp, rpmi_u32_count(resp), rpmi_u32_count(resp));
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if (rc)
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return rc;
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/* Wait for interrupt */
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wfi();
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return 0;
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}
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static int rpmi_system_suspend_check(u32 sleep_type)
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{
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return ((sleep_type == SBI_SUSP_SLEEP_TYPE_SUSPEND) &&
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syssusp_ctx.suspend_supported) ? 0 : SBI_EINVAL;
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}
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static int rpmi_system_suspend(u32 sleep_type, ulong resume_addr)
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{
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int rc;
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if (sleep_type != SBI_SUSP_SLEEP_TYPE_SUSPEND)
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return SBI_ENOTSUPP;
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rc = rpmi_syssusp(sleep_type, resume_addr);
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if (rc)
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return rc;
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return 0;
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}
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static struct sbi_system_suspend_device rpmi_suspend_dev = {
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.name = "rpmi-system-suspend",
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.system_suspend_check = rpmi_system_suspend_check,
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.system_suspend = rpmi_system_suspend,
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};
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static int rpmi_suspend_init(const void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc;
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uint32_t attrs = 0;
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/* If channel already available then do nothing. */
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if (syssusp_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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* suspend service group so do nothing.
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*/
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rc = fdt_mailbox_request_chan(fdt, nodeoff, 0, &syssusp_ctx.chan);
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if (rc)
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return SBI_ENODEV;
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/* Get suspend attributes */
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rc = rpmi_syssusp_attrs(&attrs);
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if (rc)
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return rc;
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syssusp_ctx.suspend_supported =
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attrs & RPMI_SYSSUSP_ATTRS_FLAGS_SUSPENDTYPE;
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syssusp_ctx.cust_res_addr_supported =
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attrs & RPMI_SYSSUSP_ATTRS_FLAGS_RESUMEADDR;
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sbi_system_suspend_set_device(&rpmi_suspend_dev);
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return 0;
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}
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static const struct fdt_match rpmi_suspend_match[] = {
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{ .compatible = "riscv,rpmi-system-suspend" },
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{},
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};
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const struct fdt_driver fdt_suspend_rpmi = {
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.match_table = rpmi_suspend_match,
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.init = rpmi_suspend_init,
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.experimental = true,
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};
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