drivers/firmware/arm_scmi/perf.c

Source file repositories/reference/linux-study-clean/drivers/firmware/arm_scmi/perf.c

File Facts

System
Linux kernel
Corpus path
drivers/firmware/arm_scmi/perf.c
Extension
.c
Size
32053 bytes
Lines
1319
Domain
Driver Families
Bucket
drivers/firmware
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct scmi_opp {
	u32 perf;
	u32 power;
	u32 trans_latency_us;
	u32 indicative_freq;
	u32 level_index;
	struct hlist_node hash;
};

struct scmi_msg_resp_perf_attributes {
	__le16 num_domains;
	__le16 flags;
#define POWER_SCALE_IN_MILLIWATT(x)	((x) & BIT(0))
#define POWER_SCALE_IN_MICROWATT(x)	((x) & BIT(1))
	__le32 stats_addr_low;
	__le32 stats_addr_high;
	__le32 stats_size;
};

struct scmi_msg_resp_perf_domain_attributes {
	__le32 flags;
#define SUPPORTS_SET_LIMITS(x)		((x) & BIT(31))
#define SUPPORTS_SET_PERF_LVL(x)	((x) & BIT(30))
#define SUPPORTS_PERF_LIMIT_NOTIFY(x)	((x) & BIT(29))
#define SUPPORTS_PERF_LEVEL_NOTIFY(x)	((x) & BIT(28))
#define SUPPORTS_PERF_FASTCHANNELS(x)	((x) & BIT(27))
#define SUPPORTS_EXTENDED_NAMES(x)	((x) & BIT(26))
#define SUPPORTS_LEVEL_INDEXING(x)	((x) & BIT(25))
	__le32 rate_limit_us;
	__le32 sustained_freq_khz;
	__le32 sustained_perf_level;
	    u8 name[SCMI_SHORT_NAME_MAX_SIZE];
};

struct scmi_msg_perf_describe_levels {
	__le32 domain;
	__le32 level_index;
};

struct scmi_perf_set_limits {
	__le32 domain;
	__le32 max_level;
	__le32 min_level;
};

struct scmi_perf_get_limits {
	__le32 max_level;
	__le32 min_level;
};

struct scmi_perf_set_level {
	__le32 domain;
	__le32 level;
};

struct scmi_perf_notify_level_or_limits {
	__le32 domain;
	__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;
	struct {
		__le32 perf_val;
		__le32 power;
		__le16 transition_latency_us;
		__le16 reserved;
	} opp[];
};

struct scmi_msg_resp_perf_describe_levels_v4 {
	__le16 num_returned;
	__le16 num_remaining;
	struct {
		__le32 perf_val;
		__le32 power;

Annotation

Implementation Notes