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Commit a24532f8 authored by Rob Rice's avatar Rob Rice Committed by Jassi Brar
Browse files

mailbox: Add Broadcom PDC mailbox driver 



The Broadcom PDC mailbox driver is a mailbox controller that
manages data transfers to and from one or more offload engines.

Signed-off-by: default avatarRob Rice <rob.rice@broadcom.com>
Reviewed-by: default avatarScott Branden <scott.branden@broadcom.com>
Reviewed-by: default avatarRay Jui <ray.jui@broadcom.com>
Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
parent b04f1272

drivers/mailbox/Kconfig

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@@ -123,4 +123,13 @@ config XGENE_SLIMPRO_MBOX 
	  It is used to send short messages between ARM64-bit cores and

	  the SLIMpro Management Engine, primarily for PM. Say Y here if you

	  want to use the APM X-Gene SLIMpro IPCM support.



config BCM_PDC_MBOX

	tristate "Broadcom PDC Mailbox"

	depends on ARM64 || COMPILE_TEST

	default ARCH_BCM_IPROC

	help

	  Mailbox implementation for the Broadcom PDC ring manager,

	  which provides access to various offload engines on Broadcom

	  SoCs. Say Y here if you want to use the Broadcom PDC.

endif

drivers/mailbox/Makefile

+2 −0
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@@ -25,3 +25,5 @@ obj-$(CONFIG_TI_MESSAGE_MANAGER) += ti-msgmgr.o 
obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o



obj-$(CONFIG_HI6220_MBOX)	+= hi6220-mailbox.o



obj-$(CONFIG_BCM_PDC_MBOX)	+= bcm-pdc-mailbox.o

drivers/mailbox/bcm-pdc-mailbox.c

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File added.

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include/linux/mailbox/brcm-message.h

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/*

 *  Copyright (C) 2016 Broadcom

 *

 * 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.

 *

 * Common header for Broadcom mailbox messages which is shared across

 * Broadcom SoCs and Broadcom mailbox client drivers.

 */



#ifndef _LINUX_BRCM_MESSAGE_H_

#define _LINUX_BRCM_MESSAGE_H_



#include <linux/scatterlist.h>



enum brcm_message_type {

	BRCM_MESSAGE_UNKNOWN = 0,

	BRCM_MESSAGE_SPU,

	BRCM_MESSAGE_SBA,

	BRCM_MESSAGE_MAX,

};



struct brcm_sba_command {

	u64 cmd;

#define BRCM_SBA_CMD_TYPE_A		BIT(0)

#define BRCM_SBA_CMD_TYPE_B		BIT(1)

#define BRCM_SBA_CMD_TYPE_C		BIT(2)

#define BRCM_SBA_CMD_HAS_RESP		BIT(3)

#define BRCM_SBA_CMD_HAS_OUTPUT		BIT(4)

	u64 flags;

	dma_addr_t input;

	size_t input_len;

	dma_addr_t resp;

	size_t resp_len;

	dma_addr_t output;

	size_t output_len;

};



struct brcm_message {

	enum brcm_message_type type;

	union {

		struct {

			struct scatterlist *src;

			struct scatterlist *dst;

		} spu;

		struct {

			struct brcm_sba_command *cmds;

			unsigned int cmds_count;

		} sba;

	};

	void *ctx;

	int error;

};



#endif /* _LINUX_BRCM_MESSAGE_H_ */