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/* Copyright 2013-2014 Freescale Semiconductor Inc.
*
* Interface of the I/O services to send MC commands to the MC hardware
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the above-listed copyright holders nor the
* names of any contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FSL_MC_SYS_H
#define _FSL_MC_SYS_H
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
/**
* Bit masks for a MC I/O object (struct fsl_mc_io) flags
*/
#define FSL_MC_IO_ATOMIC_CONTEXT_PORTAL 0x0001
struct fsl_mc_resource;
struct mc_command;
/**
* struct fsl_mc_io - MC I/O object to be passed-in to mc_send_command()
* @dev: device associated with this Mc I/O object
* @flags: flags for mc_send_command()
* @portal_size: MC command portal size in bytes
* @portal_phys_addr: MC command portal physical address
* @portal_virt_addr: MC command portal virtual address
* @dpmcp_dev: pointer to the DPMCP device associated with the MC portal.
*
* Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not
* set:
* @mutex: Mutex to serialize mc_send_command() calls that use the same MC
* portal, if the fsl_mc_io object was created with the
* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag off. mc_send_command() calls for this
* fsl_mc_io object must be made only from non-atomic context.
*
* Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is
* set:
* @spinlock: Spinlock to serialize mc_send_command() calls that use the same MC
* portal, if the fsl_mc_io object was created with the
* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag on. mc_send_command() calls for this
* fsl_mc_io object can be made from atomic or non-atomic context.
*/
struct fsl_mc_io {
struct device *dev;
u16 flags;
u16 portal_size;
phys_addr_t portal_phys_addr;
void __iomem *portal_virt_addr;
struct fsl_mc_device *dpmcp_dev;
union {
/*
* This field is only meaningful if the
* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not set
*/
struct mutex mutex; /* serializes mc_send_command() */
/*
* This field is only meaningful if the
* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set
*/
spinlock_t spinlock; /* serializes mc_send_command() */
};
};
int __must_check fsl_create_mc_io(struct device *dev,
phys_addr_t mc_portal_phys_addr,
u32 mc_portal_size,
struct fsl_mc_device *dpmcp_dev,
u32 flags, struct fsl_mc_io **new_mc_io);
void fsl_destroy_mc_io(struct fsl_mc_io *mc_io);
int fsl_mc_io_set_dpmcp(struct fsl_mc_io *mc_io,
struct fsl_mc_device *dpmcp_dev);
void fsl_mc_io_unset_dpmcp(struct fsl_mc_io *mc_io);
int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd);
#endif /* _FSL_MC_SYS_H */
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