cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sst-ipc.h (2057B)

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