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Convert all refactored events registration routines to use protocol handles. In order to maintain bisectability and to allow protocols and drivers to be later ported to the new protocol handle interface one by one, introduce here also some transient code that will be removed later in order to ease such transition. Link: https://lore.kernel.org/r/20210316124903.35011-8-cristian.marussi@arm.com Tested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* System Control and Management Interface (SCMI) System Power Protocol
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*
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* Copyright (C) 2020-2021 ARM Ltd.
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*/
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#define pr_fmt(fmt) "SCMI Notifications SYSTEM - " fmt
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#include <linux/scmi_protocol.h>
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#include "common.h"
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#include "notify.h"
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#define SCMI_SYSTEM_NUM_SOURCES 1
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enum scmi_system_protocol_cmd {
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SYSTEM_POWER_STATE_NOTIFY = 0x5,
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};
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struct scmi_system_power_state_notify {
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__le32 notify_enable;
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};
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struct scmi_system_power_state_notifier_payld {
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__le32 agent_id;
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__le32 flags;
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__le32 system_state;
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};
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struct scmi_system_info {
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u32 version;
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};
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static int scmi_system_request_notify(const struct scmi_handle *handle,
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bool enable)
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{
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int ret;
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struct scmi_xfer *t;
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struct scmi_system_power_state_notify *notify;
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ret = scmi_xfer_get_init(handle, SYSTEM_POWER_STATE_NOTIFY,
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SCMI_PROTOCOL_SYSTEM, sizeof(*notify), 0, &t);
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if (ret)
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return ret;
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notify = t->tx.buf;
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notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0;
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ret = scmi_do_xfer(handle, t);
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scmi_xfer_put(handle, t);
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return ret;
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}
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static int scmi_system_set_notify_enabled(const void *handle,
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u8 evt_id, u32 src_id, bool enable)
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{
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int ret;
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ret = scmi_system_request_notify(handle, enable);
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if (ret)
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pr_debug("FAIL_ENABLE - evt[%X] - ret:%d\n", evt_id, ret);
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return ret;
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}
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static void *scmi_system_fill_custom_report(const void *handle,
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u8 evt_id, ktime_t timestamp,
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const void *payld, size_t payld_sz,
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void *report, u32 *src_id)
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{
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const struct scmi_system_power_state_notifier_payld *p = payld;
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struct scmi_system_power_state_notifier_report *r = report;
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if (evt_id != SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER ||
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sizeof(*p) != payld_sz)
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return NULL;
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r->timestamp = timestamp;
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r->agent_id = le32_to_cpu(p->agent_id);
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r->flags = le32_to_cpu(p->flags);
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r->system_state = le32_to_cpu(p->system_state);
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*src_id = 0;
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return r;
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}
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static const struct scmi_event system_events[] = {
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{
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.id = SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER,
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.max_payld_sz =
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sizeof(struct scmi_system_power_state_notifier_payld),
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.max_report_sz =
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sizeof(struct scmi_system_power_state_notifier_report),
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},
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};
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static const struct scmi_event_ops system_event_ops = {
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.set_notify_enabled = scmi_system_set_notify_enabled,
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.fill_custom_report = scmi_system_fill_custom_report,
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};
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static const struct scmi_protocol_events system_protocol_events = {
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.queue_sz = SCMI_PROTO_QUEUE_SZ,
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.ops = &system_event_ops,
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.evts = system_events,
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.num_events = ARRAY_SIZE(system_events),
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.num_sources = SCMI_SYSTEM_NUM_SOURCES,
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};
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static int scmi_system_protocol_init(struct scmi_handle *handle)
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{
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u32 version;
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struct scmi_system_info *pinfo;
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scmi_version_get(handle, SCMI_PROTOCOL_SYSTEM, &version);
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dev_dbg(handle->dev, "System Power Version %d.%d\n",
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PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
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pinfo = devm_kzalloc(handle->dev, sizeof(*pinfo), GFP_KERNEL);
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if (!pinfo)
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return -ENOMEM;
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pinfo->version = version;
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handle->system_priv = pinfo;
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return 0;
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}
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static const struct scmi_protocol scmi_system = {
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.id = SCMI_PROTOCOL_SYSTEM,
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.init = &scmi_system_protocol_init,
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.ops = NULL,
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.events = &system_protocol_events,
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};
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DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(system, scmi_system)
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