firmware: arm_scmi: Add reset notifications support
Make SCMI reset protocol register with the notification core. Link: https://lore.kernel.org/r/20200701155348.52864-9-cristian.marussi@arm.com Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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@ -5,7 +5,12 @@
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* Copyright (C) 2019 ARM Ltd.
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*/
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#define pr_fmt(fmt) "SCMI Notifications RESET - " 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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enum scmi_reset_protocol_cmd {
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RESET_DOMAIN_ATTRIBUTES = 0x3,
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@ -13,10 +18,6 @@ enum scmi_reset_protocol_cmd {
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RESET_NOTIFY = 0x5,
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};
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enum scmi_reset_protocol_notify {
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RESET_ISSUED = 0x0,
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};
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#define NUM_RESET_DOMAIN_MASK 0xffff
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#define RESET_NOTIFY_ENABLE BIT(0)
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@ -40,6 +41,18 @@ struct scmi_msg_reset_domain_reset {
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#define ARCH_COLD_RESET (ARCH_RESET_TYPE | COLD_RESET_STATE)
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};
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struct scmi_msg_reset_notify {
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__le32 id;
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__le32 event_control;
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#define RESET_TP_NOTIFY_ALL BIT(0)
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};
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struct scmi_reset_issued_notify_payld {
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__le32 agent_id;
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__le32 domain_id;
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__le32 reset_state;
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};
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struct reset_dom_info {
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bool async_reset;
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bool reset_notify;
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@ -190,6 +203,75 @@ static struct scmi_reset_ops reset_ops = {
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.deassert = scmi_reset_domain_deassert,
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};
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static int scmi_reset_notify(const struct scmi_handle *handle, u32 domain_id,
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bool enable)
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{
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int ret;
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u32 evt_cntl = enable ? RESET_TP_NOTIFY_ALL : 0;
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struct scmi_xfer *t;
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struct scmi_msg_reset_notify *cfg;
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ret = scmi_xfer_get_init(handle, RESET_NOTIFY,
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SCMI_PROTOCOL_RESET, sizeof(*cfg), 0, &t);
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if (ret)
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return ret;
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cfg = t->tx.buf;
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cfg->id = cpu_to_le32(domain_id);
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cfg->event_control = cpu_to_le32(evt_cntl);
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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_reset_set_notify_enabled(const struct scmi_handle *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_reset_notify(handle, src_id, enable);
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if (ret)
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pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n",
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evt_id, src_id, ret);
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return ret;
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}
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static void *scmi_reset_fill_custom_report(const struct scmi_handle *handle,
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u8 evt_id, u64 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_reset_issued_notify_payld *p = payld;
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struct scmi_reset_issued_report *r = report;
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if (evt_id != SCMI_EVENT_RESET_ISSUED || 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->domain_id = le32_to_cpu(p->domain_id);
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r->reset_state = le32_to_cpu(p->reset_state);
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*src_id = r->domain_id;
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return r;
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}
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static const struct scmi_event reset_events[] = {
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{
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.id = SCMI_EVENT_RESET_ISSUED,
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.max_payld_sz = sizeof(struct scmi_reset_issued_notify_payld),
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.max_report_sz = sizeof(struct scmi_reset_issued_report),
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},
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};
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static const struct scmi_event_ops reset_event_ops = {
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.set_notify_enabled = scmi_reset_set_notify_enabled,
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.fill_custom_report = scmi_reset_fill_custom_report,
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};
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static int scmi_reset_protocol_init(struct scmi_handle *handle)
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{
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int domain;
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@ -218,6 +300,12 @@ static int scmi_reset_protocol_init(struct scmi_handle *handle)
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scmi_reset_domain_attributes_get(handle, domain, dom);
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}
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scmi_register_protocol_events(handle,
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SCMI_PROTOCOL_RESET, SCMI_PROTO_QUEUE_SZ,
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&reset_event_ops, reset_events,
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ARRAY_SIZE(reset_events),
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pinfo->num_domains);
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pinfo->version = version;
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handle->reset_ops = &reset_ops;
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handle->reset_priv = pinfo;
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@ -376,6 +376,7 @@ enum scmi_notification_events {
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SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
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SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
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SCMI_EVENT_SENSOR_TRIP_POINT_EVENT = 0x0,
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SCMI_EVENT_RESET_ISSUED = 0x0,
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};
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struct scmi_power_state_changed_report {
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@ -407,4 +408,11 @@ struct scmi_sensor_trip_point_report {
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u32 trip_point_desc;
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};
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struct scmi_reset_issued_report {
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u64 timestamp;
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u32 agent_id;
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u32 domain_id;
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u32 reset_state;
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};
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#endif /* _LINUX_SCMI_PROTOCOL_H */
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