forked from Mirrors/opensbi
2244a34f0d
Add a simple FDT based mailbox framework which is built on top of the generic mailbox library. The phandle of FDT mailbox DT node is treated as the unique mailbox controller ID which is required by the generic mailbox library. The FDT based mailbox drivers will be probed on-demand from fdt_mailbox_request_chan() called by the mailbox client drivers. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
36 lines
924 B
C
36 lines
924 B
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2024 Ventana Micro Systems Inc.
|
|
*
|
|
* Authors:
|
|
* Anup Patel <apatel@ventanamicro.com>
|
|
*/
|
|
|
|
#ifndef __FDT_MAILBOX_H__
|
|
#define __FDT_MAILBOX_H__
|
|
|
|
#include <sbi_utils/fdt/fdt_driver.h>
|
|
#include <sbi_utils/mailbox/mailbox.h>
|
|
|
|
struct fdt_phandle_args;
|
|
|
|
/** FDT based mailbox driver */
|
|
struct fdt_mailbox {
|
|
struct fdt_driver driver;
|
|
int (*xlate)(struct mbox_controller *mbox,
|
|
const struct fdt_phandle_args *pargs,
|
|
u32 *out_chan_args);
|
|
};
|
|
|
|
/** Request a mailbox channel using "mboxes" DT property of client DT node */
|
|
int fdt_mailbox_request_chan(const void *fdt, int nodeoff, int index,
|
|
struct mbox_chan **out_chan);
|
|
|
|
/** Simple xlate function to convert one mailbox FDT cell into channel args */
|
|
int fdt_mailbox_simple_xlate(struct mbox_controller *mbox,
|
|
const struct fdt_phandle_args *pargs,
|
|
u32 *out_chan_args);
|
|
|
|
#endif
|