firmware: arm_scmi: Add perf notifications support (fb5086dc) · Commits · 戴 / test

drivers/firmware/arm_scmi/perf.c

+134 −5

Original line number	Diff line number	Diff line
		@@ -5,15 +5,19 @@
		* Copyright (C) 2018 ARM Ltd.
		*/

		#define pr_fmt(fmt) "SCMI Notifications PERF - " fmt

		#include <linux/bits.h>
		#include <linux/of.h>
		#include <linux/io.h>
		#include <linux/io-64-nonatomic-hi-lo.h>
		#include <linux/platform_device.h>
		#include <linux/pm_opp.h>
		#include <linux/scmi_protocol.h>
		#include <linux/sort.h>

		#include "common.h"
		#include "notify.h"

		enum scmi_performance_protocol_cmd {
		PERF_DOMAIN_ATTRIBUTES = 0x3,
		@@ -27,11 +31,6 @@ enum scmi_performance_protocol_cmd {
		PERF_DESCRIBE_FASTCHANNEL = 0xb,
		};

		enum scmi_performance_protocol_notify {
		PERFORMANCE_LIMITS_CHANGED = 0x0,
		PERFORMANCE_LEVEL_CHANGED = 0x1,
		};

		struct scmi_opp {
		u32 perf;
		u32 power;
		@@ -86,6 +85,19 @@ struct scmi_perf_notify_level_or_limits {
		__le32 notify_enable;
		};

		struct scmi_perf_limits_notify_payld {
		__le32 agent_id;
		__le32 domain_id;
		__le32 range_max;
		__le32 range_min;
		};

		struct scmi_perf_level_notify_payld {
		__le32 agent_id;
		__le32 domain_id;
		__le32 performance_level;
		};

		struct scmi_msg_resp_perf_describe_levels {
		__le16 num_returned;
		__le16 num_remaining;
		@@ -158,6 +170,11 @@ struct scmi_perf_info {
		struct perf_dom_info *dom_info;
		};

		static enum scmi_performance_protocol_cmd evt_2_cmd[] = {
		PERF_NOTIFY_LIMITS,
		PERF_NOTIFY_LEVEL,
		};

		static int scmi_perf_attributes_get(const struct scmi_handle *handle,
		struct scmi_perf_info *pi)
		{
		@@ -488,6 +505,29 @@ static int scmi_perf_level_get(const struct scmi_handle *handle, u32 domain,
		return scmi_perf_mb_level_get(handle, domain, level, poll);
		}

		static int scmi_perf_level_limits_notify(const struct scmi_handle *handle,
		u32 domain, int message_id,
		bool enable)
		{
		int ret;
		struct scmi_xfer *t;
		struct scmi_perf_notify_level_or_limits *notify;

		ret = scmi_xfer_get_init(handle, message_id, SCMI_PROTOCOL_PERF,
		sizeof(*notify), 0, &t);
		if (ret)
		return ret;

		notify = t->tx.buf;
		notify->domain = cpu_to_le32(domain);
		notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0;

		ret = scmi_do_xfer(handle, t);

		scmi_xfer_put(handle, t);
		return ret;
		}

		static bool scmi_perf_fc_size_is_valid(u32 msg, u32 size)
		{
		if ((msg == PERF_LEVEL_GET \|\| msg == PERF_LEVEL_SET) && size == 4)
		@@ -722,6 +762,89 @@ static struct scmi_perf_ops perf_ops = {
		.fast_switch_possible = scmi_fast_switch_possible,
		};

		static int scmi_perf_set_notify_enabled(const struct scmi_handle *handle,
		u8 evt_id, u32 src_id, bool enable)
		{
		int ret, cmd_id;

		if (evt_id >= ARRAY_SIZE(evt_2_cmd))
		return -EINVAL;

		cmd_id = evt_2_cmd[evt_id];
		ret = scmi_perf_level_limits_notify(handle, src_id, cmd_id, enable);
		if (ret)
		pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n",
		evt_id, src_id, ret);

		return ret;
		}

		static void scmi_perf_fill_custom_report(const struct scmi_handle handle,
		u8 evt_id, u64 timestamp,
		const void *payld, size_t payld_sz,
		void report, u32 src_id)
		{
		void *rep = NULL;

		switch (evt_id) {
		case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED:
		{
		const struct scmi_perf_limits_notify_payld *p = payld;
		struct scmi_perf_limits_report *r = report;

		if (sizeof(*p) != payld_sz)
		break;

		r->timestamp = timestamp;
		r->agent_id = le32_to_cpu(p->agent_id);
		r->domain_id = le32_to_cpu(p->domain_id);
		r->range_max = le32_to_cpu(p->range_max);
		r->range_min = le32_to_cpu(p->range_min);
		*src_id = r->domain_id;
		rep = r;
		break;
		}
		case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED:
		{
		const struct scmi_perf_level_notify_payld *p = payld;
		struct scmi_perf_level_report *r = report;

		if (sizeof(*p) != payld_sz)
		break;

		r->timestamp = timestamp;
		r->agent_id = le32_to_cpu(p->agent_id);
		r->domain_id = le32_to_cpu(p->domain_id);
		r->performance_level = le32_to_cpu(p->performance_level);
		*src_id = r->domain_id;
		rep = r;
		break;
		}
		default:
		break;
		}

		return rep;
		}

		static const struct scmi_event perf_events[] = {
		{
		.id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED,
		.max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld),
		.max_report_sz = sizeof(struct scmi_perf_limits_report),
		},
		{
		.id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED,
		.max_payld_sz = sizeof(struct scmi_perf_level_notify_payld),
		.max_report_sz = sizeof(struct scmi_perf_level_report),
		},
		};

		static const struct scmi_event_ops perf_event_ops = {
		.set_notify_enabled = scmi_perf_set_notify_enabled,
		.fill_custom_report = scmi_perf_fill_custom_report,
		};

		static int scmi_perf_protocol_init(struct scmi_handle *handle)
		{
		int domain;
		@@ -754,6 +877,12 @@ static int scmi_perf_protocol_init(struct scmi_handle *handle)
		scmi_perf_domain_init_fc(handle, domain, &dom->fc_info);
		}

		scmi_register_protocol_events(handle,
		SCMI_PROTOCOL_PERF, SCMI_PROTO_QUEUE_SZ,
		&perf_event_ops, perf_events,
		ARRAY_SIZE(perf_events),
		pinfo->num_domains);

		pinfo->version = version;
		handle->perf_ops = &perf_ops;
		handle->perf_priv = pinfo;

include/linux/scmi_protocol.h

+17 −0

Original line number	Diff line number	Diff line
		@@ -378,6 +378,8 @@ void scmi_protocol_unregister(int protocol_id);
		/* SCMI Notification API - Custom Event Reports */
		enum scmi_notification_events {
		SCMI_EVENT_POWER_STATE_CHANGED = 0x0,
		SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
		SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
		};

		struct scmi_power_state_changed_report {
		@@ -387,4 +389,19 @@ struct scmi_power_state_changed_report {
		u32 power_state;
		};

		struct scmi_perf_limits_report {
		u64 timestamp;
		u32 agent_id;
		u32 domain_id;
		u32 range_max;
		u32 range_min;
		};

		struct scmi_perf_level_report {
		u64 timestamp;
		u32 agent_id;
		u32 domain_id;
		u32 performance_level;
		};

		#endif /* _LINUX_SCMI_PROTOCOL_H */

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