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      1 /* $NetBSD: scmi.h,v 1.1 2025/01/08 22:55:35 jmcneill Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2023 Mark Kettenis <kettenis (at) openbsd.org>
      5  * Copyright (c) 2024 Tobias Heider <tobhe (at) openbsd.org>
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #pragma once
     21 
     22 #include <sys/param.h>
     23 #include <sys/device.h>
     24 #include <sys/systm.h>
     25 #include <sys/bus.h>
     26 #include <sys/kmem.h>
     27 #include <sys/mutex.h>
     28 
     29 struct scmi_shmem {
     30 	uint32_t reserved1;
     31 	uint32_t channel_status;
     32 #define SCMI_CHANNEL_ERROR		(1 << 1)
     33 #define SCMI_CHANNEL_FREE		(1 << 0)
     34 	uint32_t reserved2;
     35 	uint32_t reserved3;
     36 	uint32_t channel_flags;
     37 	uint32_t length;
     38 	uint32_t message_header;
     39 	uint32_t message_payload[];
     40 };
     41 
     42 struct scmi_softc;
     43 
     44 struct scmi_perf_level {
     45 	uint32_t	pl_perf;
     46 	uint32_t	pl_cost;
     47 	uint32_t	pl_ifreq;
     48 };
     49 
     50 struct scmi_perf_domain {
     51 	struct scmi_softc		*pd_sc;
     52 	uint32_t			pd_domain_id;
     53 	size_t				pd_nlevels;
     54 	struct scmi_perf_level		*pd_levels;
     55 	int				pd_curlevel;
     56 	char				pd_name[16];
     57 	bool				pd_can_level_set;
     58 	bool				pd_level_index_mode;
     59 	uint32_t			pd_rate_limit;
     60 	uint32_t			pd_sustained_perf;
     61 
     62 	struct cpu_info			*pd_ci;	/* first CPU in domain */
     63 	u_int				pd_busy;
     64 	char				*pd_freq_available;
     65 	u_int				pd_freq_target;
     66 	int				pd_node_target;
     67 	int				pd_node_current;
     68 	int				pd_node_available;
     69 };
     70 
     71 struct scmi_perf_domain_map {
     72 	uint32_t			pm_domain;
     73 	struct cpu_info			*pm_ci;	/* first CPU in domain */
     74 };
     75 
     76 struct scmi_softc {
     77 	device_t			sc_dev;
     78 	bus_space_tag_t			sc_iot;
     79 	volatile struct scmi_shmem	*sc_shmem_tx;
     80 	volatile struct scmi_shmem	*sc_shmem_rx;
     81 	kmutex_t			sc_shmem_tx_lock;
     82 	kmutex_t			sc_shmem_rx_lock;
     83 
     84 	uint32_t			sc_smc_id;
     85 
     86 	void				*sc_mbox_tx;
     87 	int				(*sc_mbox_tx_send)(void *);
     88 	void				*sc_mbox_rx;
     89 	int				(*sc_mbox_rx_send)(void *);
     90 
     91 	size_t				sc_perf_ndmap;
     92 	struct scmi_perf_domain_map	*sc_perf_dmap;
     93 
     94 	uint16_t			sc_ver_major;
     95 	uint16_t			sc_ver_minor;
     96 
     97 #if notyet
     98 	/* SCMI_CLOCK */
     99 	struct clock_device		sc_cd;
    100 #endif
    101 
    102 	/* SCMI_PERF */
    103 	int				sc_perf_power_unit;
    104 #define SCMI_POWER_UNIT_UW	0x2
    105 #define SCMI_POWER_UNIT_MW	0x1
    106 #define SCMI_POWER_UNIT_NONE	0x0
    107 	size_t				sc_perf_ndomains;
    108 	struct scmi_perf_domain		*sc_perf_domains;
    109 
    110 	int32_t				(*sc_command)(struct scmi_softc *);
    111 };
    112 
    113 int	scmi_init_smc(struct scmi_softc *);
    114 int	scmi_init_mbox(struct scmi_softc *);
    115 
    116 void    scmi_attach_perf(struct scmi_softc *);
    117