lib: utils: Add MPXY RPMI mailbox driver for performance

Add MPXY RPMI mailbox driver for performance.

Signed-off-by: Joshua Yeong <joshua.yeong@starfivetech.com>
Reviewed-by: Rahul Pathak <rpathak@ventanamicro.com>
Link: https://lore.kernel.org/r/20251013153138.1574512-4-joshua.yeong@starfivetech.com
Signed-off-by: Anup Patel <anup@brainfault.org>

include/sbi_utils/mailbox/rpmi_msgprot.h

@@ -219,6 +219,7 @@ enum rpmi_servicegroup_id {
 	RPMI_SRVGRP_VOLTAGE = 0x00007,
 	RPMI_SRVGRP_CLOCK = 0x0008,
 	RPMI_SRVGRP_DEVICE_POWER = 0x0009,
+	RPMI_SRVGRP_PERFORMANCE = 0x0000A,
 	RPMI_SRVGRP_ID_MAX_COUNT,
 
 	/* Reserved range for service groups */
@@ -829,4 +830,121 @@ struct rpmi_dpwr_get_state_resp {
 	u32 state;
 };
 
+/** RPMI Performance ServiceGroup Service IDs */
+enum rpmi_performance_service_id {
+	RPMI_PERF_SRV_ENABLE_NOTIFICATION = 0x01,
+	RPMI_PERF_SRV_GET_NUM_DOMAINS = 0x02,
+	RPMI_PERF_SRV_GET_ATTRIBUTES = 0x03,
+	RPMI_PERF_SRV_GET_SUPPORTED_LEVELS = 0x04,
+	RPMI_PERF_SRV_GET_LEVEL = 0x05,
+	RPMI_PERF_SRV_SET_LEVEL = 0x06,
+	RPMI_PERF_SRV_GET_LIMIT = 0x07,
+	RPMI_PERF_SRV_SET_LIMIT = 0x08,
+	RPMI_PERF_SRV_GET_FAST_CHANNEL_REGION = 0x09,
+	RPMI_PERF_SRV_GET_FAST_CHANNEL_ATTRIBUTES = 0x0A,
+	RPMI_PERF_SRV_MAX_COUNT,
+};
+
+struct rpmi_perf_get_num_domain_resp {
+	s32 status;
+	u32 num_domains;
+};
+
+struct rpmi_perf_get_attrs_req {
+	u32 domain_id;
+};
+
+struct rpmi_perf_get_attrs_resp {
+	s32 status;
+	u32 flags;
+	u32 num_level;
+	u32 latency;
+	u8 name[16];
+};
+
+struct rpmi_perf_get_supported_level_req {
+	u32 domain_id;
+	u32 perf_level_index;
+};
+
+struct rpmi_perf_domain_level {
+	u32 level_index;
+	u32 opp_level;
+	u32 power_cost_uw;
+	u32 transition_latency_us;
+};
+
+struct rpmi_perf_get_supported_level_resp {
+	s32 status;
+	u32 reserve;
+	u32 remaining;
+	u32 returned;
+	struct rpmi_perf_domain_level level[0];
+};
+
+struct rpmi_perf_get_level_req {
+	u32 domain_id;
+};
+
+struct rpmi_perf_get_level_resp {
+	s32 status;
+	u32 level_index;
+};
+
+struct rpmi_perf_set_level_req {
+	u32 domain_id;
+	u32 level_index;
+};
+
+struct rpmi_perf_set_level_resp {
+	s32 status;
+};
+
+struct rpmi_perf_get_limit_req {
+	u32 domain_id;
+};
+
+struct rpmi_perf_get_limit_resp {
+	s32 status;
+	u32 level_index_max;
+	u32 level_index_min;
+};
+
+struct rpmi_perf_set_limit_req {
+	u32 domain_id;
+	u32 level_index_max;
+	u32 level_index_min;
+};
+
+struct rpmi_perf_set_limit_resp {
+	s32 status;
+};
+
+struct rpmi_perf_get_fast_chn_region_resp {
+	s32 status;
+	u32 region_phy_addr_low;
+	u32 region_phy_addr_high;
+	u32 region_size_low;
+	u32 region_size_high;
+};
+
+struct rpmi_perf_get_fast_chn_attr_req {
+	u32 domain_id;
+	u32 service_id;
+};
+
+struct rpmi_perf_get_fast_chn_attr_resp {
+	s32 status;
+	u32 flags;
+	u32 region_offset_low;
+	u32 region_offset_high;
+	u32 region_size;
+	u32 db_addr_low;
+	u32 db_addr_high;
+	u32 db_id_low;
+	u32 db_id_high;
+	u32 db_perserved_low;
+	u32 db_perserved_high;
+};
+
 #endif /* !__RPMI_MSGPROT_H__ */

lib/utils/mpxy/Kconfig

@@ -30,6 +30,10 @@ config FDT_MPXY_RPMI_DEVICE_POWER
 	bool "MPXY driver for RPMI device power service group"
 	default n
 
+config FDT_MPXY_RPMI_PERFORMANCE
+	bool "MPXY driver for RPMI performance service group"
+	default n
+
 endif
 
 endmenu

lib/utils/mpxy/fdt_mpxy_rpmi_performance.c

@@ -0,0 +1,91 @@
+#include <sbi_utils/mpxy/fdt_mpxy_rpmi_mbox.h>
+
+static struct mpxy_rpmi_service_data performance_services[] = {
+{
+	.id = RPMI_PERF_SRV_ENABLE_NOTIFICATION,
+	.min_tx_len = sizeof(struct rpmi_enable_notification_req),
+	.max_tx_len = sizeof(struct rpmi_enable_notification_req),
+	.min_rx_len = sizeof(struct rpmi_enable_notification_resp),
+	.max_rx_len = sizeof(struct rpmi_enable_notification_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_NUM_DOMAINS,
+	.min_tx_len = 0,
+	.max_tx_len = 0,
+	.min_rx_len = sizeof(struct rpmi_perf_get_num_domain_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_num_domain_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_ATTRIBUTES,
+	.min_tx_len = sizeof(struct rpmi_perf_get_attrs_req),
+	.max_tx_len = sizeof(struct rpmi_perf_get_attrs_req),
+	.min_rx_len = sizeof(struct rpmi_perf_get_attrs_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_attrs_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_SUPPORTED_LEVELS,
+	.min_tx_len = sizeof(struct rpmi_perf_get_supported_level_req),
+	.max_tx_len = sizeof(struct rpmi_perf_get_supported_level_req),
+	.min_rx_len = sizeof(struct rpmi_perf_get_supported_level_resp),
+	.max_rx_len = -1U,
+},
+{
+	.id = RPMI_PERF_SRV_GET_LEVEL,
+	.min_tx_len = sizeof(struct rpmi_perf_get_level_req),
+	.max_tx_len = sizeof(struct rpmi_perf_get_level_req),
+	.min_rx_len = sizeof(struct rpmi_perf_get_level_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_level_resp),
+},
+{
+	.id = RPMI_PERF_SRV_SET_LEVEL,
+	.min_tx_len = sizeof(struct rpmi_perf_set_level_req),
+	.max_tx_len = sizeof(struct rpmi_perf_set_level_req),
+	.min_rx_len = sizeof(struct rpmi_perf_set_level_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_set_level_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_LIMIT,
+	.min_tx_len = sizeof(struct rpmi_perf_get_limit_req),
+	.max_tx_len = sizeof(struct rpmi_perf_get_limit_req),
+	.min_rx_len = sizeof(struct rpmi_perf_get_limit_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_limit_resp),
+},
+{
+	.id = RPMI_PERF_SRV_SET_LIMIT,
+	.min_tx_len = sizeof(struct rpmi_perf_set_limit_req),
+	.max_tx_len = sizeof(struct rpmi_perf_set_limit_req),
+	.min_rx_len = sizeof(struct rpmi_perf_set_limit_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_set_limit_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_FAST_CHANNEL_REGION,
+	.min_tx_len = 0,
+	.max_tx_len = 0,
+	.min_rx_len = sizeof(struct rpmi_perf_get_fast_chn_region_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_fast_chn_region_resp),
+},
+{
+	.id = RPMI_PERF_SRV_GET_FAST_CHANNEL_ATTRIBUTES,
+	.min_tx_len = sizeof(struct rpmi_perf_get_fast_chn_attr_req),
+	.max_tx_len = sizeof(struct rpmi_perf_get_fast_chn_attr_req),
+	.min_rx_len = sizeof(struct rpmi_perf_get_fast_chn_attr_resp),
+	.max_rx_len = sizeof(struct rpmi_perf_get_fast_chn_attr_resp),
+},
+};
+
+static const struct mpxy_rpmi_mbox_data performance_data = {
+	.servicegrp_id = RPMI_SRVGRP_PERFORMANCE ,
+	.num_services = RPMI_PERF_SRV_MAX_COUNT,
+	.service_data = performance_services,
+};
+
+static const struct fdt_match performance_match[] = {
+	{ .compatible = "riscv,rpmi-mpxy-performance", .data = &performance_data },
+	{ },
+};
+
+const struct fdt_driver fdt_mpxy_rpmi_performance = {
+	.experimental = true,
+	.match_table = performance_match,
+	.init = mpxy_rpmi_mbox_init,
+};

lib/utils/mpxy/objects.mk

@@ -15,6 +15,9 @@ libsbiutils-objs-$(CONFIG_FDT_MPXY_RPMI_MBOX) += mpxy/fdt_mpxy_rpmi_mbox.o
 carray-fdt_mpxy_drivers-$(CONFIG_FDT_MPXY_RPMI_CLOCK) += fdt_mpxy_rpmi_clock
 libsbiutils-objs-$(CONFIG_FDT_MPXY_RPMI_CLOCK) += mpxy/fdt_mpxy_rpmi_clock.o
 
+carray-fdt_mpxy_drivers-$(CONFIG_FDT_MPXY_RPMI_PERFORMANCE) += fdt_mpxy_rpmi_performance
+libsbiutils-objs-$(CONFIG_FDT_MPXY_RPMI_PERFORMANCE) += mpxy/fdt_mpxy_rpmi_performance.o
+
 carray-fdt_mpxy_drivers-$(CONFIG_FDT_MPXY_RPMI_SYSMSI) += fdt_mpxy_rpmi_sysmsi
 libsbiutils-objs-$(CONFIG_FDT_MPXY_RPMI_SYSMSI) += mpxy/fdt_mpxy_rpmi_sysmsi.o
 

platform/generic/configs/defconfig

@@ -66,4 +66,5 @@ CONFIG_FDT_MPXY_RPMI_MBOX=y
 CONFIG_FDT_MPXY_RPMI_CLOCK=y
 CONFIG_FDT_MPXY_RPMI_VOLTAGE=y
 CONFIG_FDT_MPXY_RPMI_DEVICE_POWER=y
+CONFIG_FDT_MPXY_RPMI_PERFORMANCE=y
 CONFIG_FDT_MPXY_RPMI_SYSMSI=y