OpenCloudOS-Kernel/drivers/mailbox/mailbox.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef __MAILBOX_H
#define __MAILBOX_H

#define TXDONE_BY_IRQ	BIT(0) /* controller has remote RTR irq */
#define TXDONE_BY_POLL	BIT(1) /* controller can read status of last TX */
#define TXDONE_BY_ACK	BIT(2) /* S/W ACK recevied by Client ticks the TX */

#endif /* __MAILBOX_H */
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-06-04 16:11:33 +08:00			`/* SPDX-License-Identifier: GPL-2.0-only */`
Mailbox: Add support for Platform Communication Channel ACPI 5.0+ spec defines a generic mode of communication between the OS and a platform such as the BMC. This medium (PCC) is typically used by CPPC (ACPI CPU Performance management), RAS (ACPI reliability protocol) and MPST (ACPI Memory power states). This patch adds PCC support as a Mailbox Controller. As of ACPI v5.1 there is no provision for clients to lookup mailbox controllers in a way that Linux expects. e.g. in DT the clients can list the mailboxes they can associate with in the DT binding and then provide a unique index to lookup a channel within a mailbox. Since the ACPI spec doesn't have anything similar, we introduce a mailbox controller specific API so that when the client calls it, we know to lookup in the context of a specific controller. This also helps in keeping a consistent interface across DT and ACPI for such drivers. This patch implements basic PCC support using the ACPI v5.1 structures. IRQ mode support will be provided as follow up patches. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Reviewed-by: Mark Brown <broonie@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> 2014-11-13 08:59:38 +08:00
			`#ifndef __MAILBOX_H`
			`#define __MAILBOX_H`

			`#define TXDONE_BY_IRQ BIT(0) /* controller has remote RTR irq */`
			`#define TXDONE_BY_POLL BIT(1) /* controller can read status of last TX */`
			`#define TXDONE_BY_ACK BIT(2) /* S/W ACK recevied by Client ticks the TX */`

			`#endif /* __MAILBOX_H */`