/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright 2019 NXP * * Header file for the DSP IPC implementation */ #ifndef _IMX_DSP_IPC_H #define _IMX_DSP_IPC_H #include <linux/device.h> #include <linux/types.h> #include <linux/mailbox_client.h> #define DSP_MU_CHAN_NUM 4 struct imx_dsp_chan { struct imx_dsp_ipc *ipc; struct mbox_client cl; struct mbox_chan *ch; char *name; int idx; }; struct imx_dsp_ops { void (*handle_reply)(struct imx_dsp_ipc *ipc); void (*handle_request)(struct imx_dsp_ipc *ipc); }; struct imx_dsp_ipc { /* Host <-> DSP communication uses 2 txdb and 2 rxdb channels */ struct imx_dsp_chan chans[DSP_MU_CHAN_NUM]; struct device *dev; struct imx_dsp_ops *ops; void *private_data; }; static inline void imx_dsp_set_data(struct imx_dsp_ipc *ipc, void *data) { ipc->private_data = data; } static inline void *imx_dsp_get_data(struct imx_dsp_ipc *ipc) { return ipc->private_data; } #if IS_ENABLED(CONFIG_IMX_DSP) int imx_dsp_ring_doorbell(struct imx_dsp_ipc *dsp, unsigned int chan_idx); struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx); void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx); #else static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, unsigned int chan_idx) { return -ENOTSUPP; } struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx) { return ERR_PTR(-EOPNOTSUPP); } void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx) { } #endif #endif /* _IMX_DSP_IPC_H */