Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
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/*
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* Apple mailbox message format
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*
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* Copyright The Asahi Linux Contributors
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*/
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#ifndef _APPLE_MAILBOX_H_
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#define _APPLE_MAILBOX_H_
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#include <linux/device.h>
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#include <linux/types.h>
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/* encodes a single 96bit message sent over the single channel */
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struct apple_mbox_msg {
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u64 msg0;
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u32 msg1;
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};
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struct apple_mbox {
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struct device *dev;
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void __iomem *regs;
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const struct apple_mbox_hw *hw;
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bool active;
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int irq_recv_not_empty;
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int irq_send_empty;
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spinlock_t rx_lock;
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spinlock_t tx_lock;
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struct completion tx_empty;
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/** Receive callback for incoming messages */
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void (*rx)(struct apple_mbox *mbox, struct apple_mbox_msg msg, void *cookie);
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void *cookie;
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};
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struct apple_mbox *apple_mbox_get(struct device *dev, int index);
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struct apple_mbox *apple_mbox_get_byname(struct device *dev, const char *name);
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int apple_mbox_start(struct apple_mbox *mbox);
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void apple_mbox_stop(struct apple_mbox *mbox);
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int apple_mbox_poll(struct apple_mbox *mbox);
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int apple_mbox_send(struct apple_mbox *mbox, struct apple_mbox_msg msg,
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bool atomic);
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#endif
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