142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* RapidIO configuration space access support
|
|
*
|
|
* Copyright 2005 MontaVista Software, Inc.
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
*/
|
|
|
|
#include <linux/rio.h>
|
|
#include <linux/module.h>
|
|
|
|
/*
|
|
* Wrappers for all RIO configuration access functions. They just check
|
|
* alignment and call the low-level functions pointed to by rio_mport->ops.
|
|
*/
|
|
|
|
#define RIO_8_BAD 0
|
|
#define RIO_16_BAD (offset & 1)
|
|
#define RIO_32_BAD (offset & 3)
|
|
|
|
/**
|
|
* RIO_LOP_READ - Generate rio_local_read_config_* functions
|
|
* @size: Size of configuration space read (8, 16, 32 bits)
|
|
* @type: C type of value argument
|
|
* @len: Length of configuration space read (1, 2, 4 bytes)
|
|
*
|
|
* Generates rio_local_read_config_* functions used to access
|
|
* configuration space registers on the local device.
|
|
*/
|
|
#define RIO_LOP_READ(size,type,len) \
|
|
int __rio_local_read_config_##size \
|
|
(struct rio_mport *mport, u32 offset, type *value) \
|
|
{ \
|
|
int res; \
|
|
u32 data = 0; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
res = mport->ops->lcread(mport, mport->id, offset, len, &data); \
|
|
*value = (type)data; \
|
|
return res; \
|
|
}
|
|
|
|
/**
|
|
* RIO_LOP_WRITE - Generate rio_local_write_config_* functions
|
|
* @size: Size of configuration space write (8, 16, 32 bits)
|
|
* @type: C type of value argument
|
|
* @len: Length of configuration space write (1, 2, 4 bytes)
|
|
*
|
|
* Generates rio_local_write_config_* functions used to access
|
|
* configuration space registers on the local device.
|
|
*/
|
|
#define RIO_LOP_WRITE(size,type,len) \
|
|
int __rio_local_write_config_##size \
|
|
(struct rio_mport *mport, u32 offset, type value) \
|
|
{ \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
return mport->ops->lcwrite(mport, mport->id, offset, len, value);\
|
|
}
|
|
|
|
RIO_LOP_READ(8, u8, 1)
|
|
RIO_LOP_READ(16, u16, 2)
|
|
RIO_LOP_READ(32, u32, 4)
|
|
RIO_LOP_WRITE(8, u8, 1)
|
|
RIO_LOP_WRITE(16, u16, 2)
|
|
RIO_LOP_WRITE(32, u32, 4)
|
|
|
|
EXPORT_SYMBOL_GPL(__rio_local_read_config_8);
|
|
EXPORT_SYMBOL_GPL(__rio_local_read_config_16);
|
|
EXPORT_SYMBOL_GPL(__rio_local_read_config_32);
|
|
EXPORT_SYMBOL_GPL(__rio_local_write_config_8);
|
|
EXPORT_SYMBOL_GPL(__rio_local_write_config_16);
|
|
EXPORT_SYMBOL_GPL(__rio_local_write_config_32);
|
|
|
|
/**
|
|
* RIO_OP_READ - Generate rio_mport_read_config_* functions
|
|
* @size: Size of configuration space read (8, 16, 32 bits)
|
|
* @type: C type of value argument
|
|
* @len: Length of configuration space read (1, 2, 4 bytes)
|
|
*
|
|
* Generates rio_mport_read_config_* functions used to access
|
|
* configuration space registers on the local device.
|
|
*/
|
|
#define RIO_OP_READ(size,type,len) \
|
|
int rio_mport_read_config_##size \
|
|
(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value) \
|
|
{ \
|
|
int res; \
|
|
u32 data = 0; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
res = mport->ops->cread(mport, mport->id, destid, hopcount, offset, len, &data); \
|
|
*value = (type)data; \
|
|
return res; \
|
|
}
|
|
|
|
/**
|
|
* RIO_OP_WRITE - Generate rio_mport_write_config_* functions
|
|
* @size: Size of configuration space write (8, 16, 32 bits)
|
|
* @type: C type of value argument
|
|
* @len: Length of configuration space write (1, 2, 4 bytes)
|
|
*
|
|
* Generates rio_mport_write_config_* functions used to access
|
|
* configuration space registers on the local device.
|
|
*/
|
|
#define RIO_OP_WRITE(size,type,len) \
|
|
int rio_mport_write_config_##size \
|
|
(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value) \
|
|
{ \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
return mport->ops->cwrite(mport, mport->id, destid, hopcount, \
|
|
offset, len, value); \
|
|
}
|
|
|
|
RIO_OP_READ(8, u8, 1)
|
|
RIO_OP_READ(16, u16, 2)
|
|
RIO_OP_READ(32, u32, 4)
|
|
RIO_OP_WRITE(8, u8, 1)
|
|
RIO_OP_WRITE(16, u16, 2)
|
|
RIO_OP_WRITE(32, u32, 4)
|
|
|
|
EXPORT_SYMBOL_GPL(rio_mport_read_config_8);
|
|
EXPORT_SYMBOL_GPL(rio_mport_read_config_16);
|
|
EXPORT_SYMBOL_GPL(rio_mport_read_config_32);
|
|
EXPORT_SYMBOL_GPL(rio_mport_write_config_8);
|
|
EXPORT_SYMBOL_GPL(rio_mport_write_config_16);
|
|
EXPORT_SYMBOL_GPL(rio_mport_write_config_32);
|
|
|
|
/**
|
|
* rio_mport_send_doorbell - Send a doorbell message
|
|
*
|
|
* @mport: RIO master port
|
|
* @destid: RIO device destination ID
|
|
* @data: Doorbell message data
|
|
*
|
|
* Send a doorbell message to a RIO device. The doorbell message
|
|
* has a 16-bit info field provided by the data argument.
|
|
*/
|
|
int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)
|
|
{
|
|
return mport->ops->dsend(mport, mport->id, destid, data);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(rio_mport_send_doorbell);
|