11802d0beSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2a33c1ec5SJin Yao /* 3a33c1ec5SJin Yao * Intel SST generic IPC Support 4a33c1ec5SJin Yao * 5a33c1ec5SJin Yao * Copyright (C) 2015, Intel Corporation. All rights reserved. 6a33c1ec5SJin Yao */ 7a33c1ec5SJin Yao 8a33c1ec5SJin Yao #ifndef __SST_GENERIC_IPC_H 9a33c1ec5SJin Yao #define __SST_GENERIC_IPC_H 10a33c1ec5SJin Yao 11a33c1ec5SJin Yao #include <linux/types.h> 12a33c1ec5SJin Yao #include <linux/kernel.h> 13a33c1ec5SJin Yao #include <linux/wait.h> 14a33c1ec5SJin Yao #include <linux/list.h> 15a33c1ec5SJin Yao #include <linux/workqueue.h> 16a33c1ec5SJin Yao #include <linux/sched.h> 17a33c1ec5SJin Yao 18*abf31feeSCezary Rojewski struct sst_ipc_message { 19*abf31feeSCezary Rojewski u64 header; 20*abf31feeSCezary Rojewski void *data; 21*abf31feeSCezary Rojewski size_t size; 22*abf31feeSCezary Rojewski }; 23*abf31feeSCezary Rojewski 24a33c1ec5SJin Yao struct ipc_message { 25a33c1ec5SJin Yao struct list_head list; 26*abf31feeSCezary Rojewski struct sst_ipc_message tx; 27*abf31feeSCezary Rojewski struct sst_ipc_message rx; 28a33c1ec5SJin Yao 29a33c1ec5SJin Yao wait_queue_head_t waitq; 30a33c1ec5SJin Yao bool pending; 31a33c1ec5SJin Yao bool complete; 32a33c1ec5SJin Yao bool wait; 33a33c1ec5SJin Yao int errno; 34a33c1ec5SJin Yao }; 35a33c1ec5SJin Yao 36a33c1ec5SJin Yao struct sst_generic_ipc; 37bcc2a2dcSCezary Rojewski struct sst_dsp; 38a33c1ec5SJin Yao 39a33c1ec5SJin Yao struct sst_plat_ipc_ops { 40a33c1ec5SJin Yao void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *); 41a33c1ec5SJin Yao void (*shim_dbg)(struct sst_generic_ipc *, const char *); 42a33c1ec5SJin Yao void (*tx_data_copy)(struct ipc_message *, char *, size_t); 43a33c1ec5SJin Yao u64 (*reply_msg_match)(u64 header, u64 *mask); 446022d330SSubhransu S. Prusty bool (*is_dsp_busy)(struct sst_dsp *dsp); 45f999d1fdSVinod Koul int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state); 46a33c1ec5SJin Yao }; 47a33c1ec5SJin Yao 48a33c1ec5SJin Yao /* SST generic IPC data */ 49a33c1ec5SJin Yao struct sst_generic_ipc { 50a33c1ec5SJin Yao struct device *dev; 51a33c1ec5SJin Yao struct sst_dsp *dsp; 52a33c1ec5SJin Yao 53a33c1ec5SJin Yao /* IPC messaging */ 54a33c1ec5SJin Yao struct list_head tx_list; 55a33c1ec5SJin Yao struct list_head rx_list; 56a33c1ec5SJin Yao struct list_head empty_list; 57a33c1ec5SJin Yao wait_queue_head_t wait_txq; 58a33c1ec5SJin Yao struct task_struct *tx_thread; 59786e1c37STakashi Iwai struct work_struct kwork; 60a33c1ec5SJin Yao bool pending; 61a33c1ec5SJin Yao struct ipc_message *msg; 621925e219SSubhransu S. Prusty int tx_data_max_size; 631925e219SSubhransu S. Prusty int rx_data_max_size; 64a33c1ec5SJin Yao 65a33c1ec5SJin Yao struct sst_plat_ipc_ops ops; 66a33c1ec5SJin Yao }; 67a33c1ec5SJin Yao 68*abf31feeSCezary Rojewski int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, 69*abf31feeSCezary Rojewski struct sst_ipc_message request, struct sst_ipc_message *reply); 70a33c1ec5SJin Yao 71*abf31feeSCezary Rojewski int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, 72*abf31feeSCezary Rojewski struct sst_ipc_message request); 73a33c1ec5SJin Yao 74*abf31feeSCezary Rojewski int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, 75*abf31feeSCezary Rojewski struct sst_ipc_message request, struct sst_ipc_message *reply); 7680a0df18SVinod Koul 77a33c1ec5SJin Yao struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc, 78a33c1ec5SJin Yao u64 header); 79a33c1ec5SJin Yao 80a33c1ec5SJin Yao void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc, 81a33c1ec5SJin Yao struct ipc_message *msg); 82a33c1ec5SJin Yao 83a33c1ec5SJin Yao int sst_ipc_init(struct sst_generic_ipc *ipc); 84a33c1ec5SJin Yao void sst_ipc_fini(struct sst_generic_ipc *ipc); 85a33c1ec5SJin Yao 86a33c1ec5SJin Yao #endif 87