lib: utils/cppc: Add RPMI CPPC driver

Add RPMI based driver for CPPC register read, write and probe.

Signed-off-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Co-developed-by: Rahul Pathak <rpathak@ventanamicro.com>
Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Co-developed-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>

include/sbi_utils/mailbox/rpmi_msgprot.h

@@ -200,6 +200,7 @@ enum rpmi_servicegroup_id {
 	RPMI_SRVGRP_SYSTEM_RESET = 0x0002,
 	RPMI_SRVGRP_SYSTEM_SUSPEND = 0x0003,
 	RPMI_SRVGRP_HSM = 0x0004,
+	RPMI_SRVGRP_CPPC = 0x0005,
 	RPMI_SRVGRP_ID_MAX_COUNT,
 
 	/* Reserved range for service groups */
@@ -406,4 +407,108 @@ struct rpmi_hsm_get_susp_info_resp {
 	u32 min_residency_us;
 };
 
+/** RPMI CPPC ServiceGroup Service IDs */
+enum rpmi_cppc_service_id {
+	RPMI_CPPC_SRV_ENABLE_NOTIFICATION = 0x01,
+	RPMI_CPPC_SRV_PROBE_REG = 0x02,
+	RPMI_CPPC_SRV_READ_REG = 0x03,
+	RPMI_CPPC_SRV_WRITE_REG = 0x04,
+	RPMI_CPPC_SRV_GET_FAST_CHANNEL_REGION = 0x05,
+	RPMI_CPPC_SRV_GET_FAST_CHANNEL_OFFSET = 0x06,
+	RPMI_CPPC_SRV_GET_HART_LIST = 0x07,
+	RPMI_CPPC_SRV_MAX_COUNT,
+};
+
+struct rpmi_cppc_probe_req {
+	u32 hart_id;
+	u32 reg_id;
+};
+
+struct rpmi_cppc_probe_resp {
+	s32 status;
+	u32 reg_len;
+};
+
+struct rpmi_cppc_read_reg_req {
+	u32 hart_id;
+	u32 reg_id;
+};
+
+struct rpmi_cppc_read_reg_resp {
+	s32 status;
+	u32 data_lo;
+	u32 data_hi;
+};
+
+struct rpmi_cppc_write_reg_req {
+	u32 hart_id;
+	u32 reg_id;
+	u32 data_lo;
+	u32 data_hi;
+};
+
+struct rpmi_cppc_write_reg_resp {
+	s32 status;
+};
+
+struct rpmi_cppc_get_fastchan_offset_req {
+	u32 hart_id;
+};
+
+struct rpmi_cppc_get_fastchan_offset_resp {
+	s32 status;
+	u32 fc_perf_request_offset_lo;
+	u32 fc_perf_request_offset_hi;
+	u32 fc_perf_feedback_offset_lo;
+	u32 fc_perf_feedback_offset_hi;
+};
+
+#define RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_POS		3
+#define RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_MASK		\
+			(3U << RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_POS)
+#define RPMI_CPPC_FAST_CHANNEL_FLAGS_DB_WIDTH_POS	1
+#define RPMI_CPPC_FAST_CHANNEL_FLAGS_DB_WIDTH_MASK	\
+			(3U << RPMI_CPPC_FAST_CHANNEL_FLAGS_DB_WIDTH_POS)
+#define RPMI_CPPC_FAST_CHANNEL_FLAGS_DB_SUPPORTED	(1U << 0)
+
+struct rpmi_cppc_get_fastchan_region_resp {
+	s32 status;
+	u32 flags;
+	u32 region_addr_lo;
+	u32 region_addr_hi;
+	u32 region_size_lo;
+	u32 region_size_hi;
+	u32 db_addr_lo;
+	u32 db_addr_hi;
+	u32 db_setmask_lo;
+	u32 db_setmask_hi;
+	u32 db_preservemask_lo;
+	u32 db_preservemask_hi;
+};
+
+enum rpmi_cppc_fast_channel_db_width {
+	RPMI_CPPC_FAST_CHANNEL_DB_WIDTH_8 = 0x0,
+	RPMI_CPPC_FAST_CHANNEL_DB_WIDTH_16 = 0x1,
+	RPMI_CPPC_FAST_CHANNEL_DB_WIDTH_32 = 0x2,
+	RPMI_CPPC_FAST_CHANNEL_DB_WIDTH_64 = 0x3,
+};
+
+enum rpmi_cppc_fast_channel_cppc_mode {
+	RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_PASSIVE = 0x0,
+	RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_ACTIVE = 0x1,
+	RPMI_CPPC_FAST_CHANNEL_CPPC_MODE_MAX_IDX,
+};
+
+struct rpmi_cppc_hart_list_req {
+	u32 start_index;
+};
+
+struct rpmi_cppc_hart_list_resp {
+	s32 status;
+	u32 remaining;
+	u32 returned;
+	/* remaining space need to be adjusted for the above 3 u32's */
+	u32 hartid[(RPMI_MSG_DATA_SIZE(RPMI_SLOT_SIZE_MIN) - (sizeof(u32) * 3)) / sizeof(u32)];
+};
+
 #endif /* !__RPMI_MSGPROT_H__ */