1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Intel SST generic IPC Support 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2015, Intel Corporation. All rights reserved. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __SST_GENERIC_IPC_H 9*4882a593Smuzhiyun #define __SST_GENERIC_IPC_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/types.h> 12*4882a593Smuzhiyun #include <linux/kernel.h> 13*4882a593Smuzhiyun #include <linux/wait.h> 14*4882a593Smuzhiyun #include <linux/list.h> 15*4882a593Smuzhiyun #include <linux/workqueue.h> 16*4882a593Smuzhiyun #include <linux/sched.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun struct sst_ipc_message { 19*4882a593Smuzhiyun u64 header; 20*4882a593Smuzhiyun void *data; 21*4882a593Smuzhiyun size_t size; 22*4882a593Smuzhiyun }; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct ipc_message { 25*4882a593Smuzhiyun struct list_head list; 26*4882a593Smuzhiyun struct sst_ipc_message tx; 27*4882a593Smuzhiyun struct sst_ipc_message rx; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun wait_queue_head_t waitq; 30*4882a593Smuzhiyun bool pending; 31*4882a593Smuzhiyun bool complete; 32*4882a593Smuzhiyun bool wait; 33*4882a593Smuzhiyun int errno; 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct sst_generic_ipc; 37*4882a593Smuzhiyun struct sst_dsp; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun struct sst_plat_ipc_ops { 40*4882a593Smuzhiyun void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *); 41*4882a593Smuzhiyun void (*shim_dbg)(struct sst_generic_ipc *, const char *); 42*4882a593Smuzhiyun void (*tx_data_copy)(struct ipc_message *, char *, size_t); 43*4882a593Smuzhiyun u64 (*reply_msg_match)(u64 header, u64 *mask); 44*4882a593Smuzhiyun bool (*is_dsp_busy)(struct sst_dsp *dsp); 45*4882a593Smuzhiyun int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state); 46*4882a593Smuzhiyun }; 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* SST generic IPC data */ 49*4882a593Smuzhiyun struct sst_generic_ipc { 50*4882a593Smuzhiyun struct device *dev; 51*4882a593Smuzhiyun struct sst_dsp *dsp; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun /* IPC messaging */ 54*4882a593Smuzhiyun struct list_head tx_list; 55*4882a593Smuzhiyun struct list_head rx_list; 56*4882a593Smuzhiyun struct list_head empty_list; 57*4882a593Smuzhiyun wait_queue_head_t wait_txq; 58*4882a593Smuzhiyun struct task_struct *tx_thread; 59*4882a593Smuzhiyun struct work_struct kwork; 60*4882a593Smuzhiyun bool pending; 61*4882a593Smuzhiyun struct ipc_message *msg; 62*4882a593Smuzhiyun int tx_data_max_size; 63*4882a593Smuzhiyun int rx_data_max_size; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun struct sst_plat_ipc_ops ops; 66*4882a593Smuzhiyun }; 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, 69*4882a593Smuzhiyun struct sst_ipc_message request, struct sst_ipc_message *reply); 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, 72*4882a593Smuzhiyun struct sst_ipc_message request); 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, 75*4882a593Smuzhiyun struct sst_ipc_message request, struct sst_ipc_message *reply); 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc, 78*4882a593Smuzhiyun u64 header); 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc, 81*4882a593Smuzhiyun struct ipc_message *msg); 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun int sst_ipc_init(struct sst_generic_ipc *ipc); 84*4882a593Smuzhiyun void sst_ipc_fini(struct sst_generic_ipc *ipc); 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun #endif 87