mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
34af946a22
locking init cleanups: - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK() - convert rwlocks in a similar manner this patch was generated automatically. Motivation: - cleanliness - lockdep needs control of lock initialization, which the open-coded variants do not give - it's also useful for -rt and for lock debugging in general Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
176 lines
5.5 KiB
C
176 lines
5.5 KiB
C
/*
|
|
* RapidIO configuration space access support
|
|
*
|
|
* Copyright 2005 MontaVista Software, Inc.
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/rio.h>
|
|
#include <linux/module.h>
|
|
|
|
/*
|
|
* These interrupt-safe spinlocks protect all accesses to RIO
|
|
* configuration space and doorbell access.
|
|
*/
|
|
static DEFINE_SPINLOCK(rio_config_lock);
|
|
static DEFINE_SPINLOCK(rio_doorbell_lock);
|
|
|
|
/*
|
|
* Wrappers for all RIO configuration access functions. They just check
|
|
* alignment, do locking 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; \
|
|
unsigned long flags; \
|
|
u32 data = 0; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
spin_lock_irqsave(&rio_config_lock, flags); \
|
|
res = mport->ops->lcread(mport->id, offset, len, &data); \
|
|
*value = (type)data; \
|
|
spin_unlock_irqrestore(&rio_config_lock, flags); \
|
|
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) \
|
|
{ \
|
|
int res; \
|
|
unsigned long flags; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
spin_lock_irqsave(&rio_config_lock, flags); \
|
|
res = mport->ops->lcwrite(mport->id, offset, len, value); \
|
|
spin_unlock_irqrestore(&rio_config_lock, flags); \
|
|
return res; \
|
|
}
|
|
|
|
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; \
|
|
unsigned long flags; \
|
|
u32 data = 0; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
spin_lock_irqsave(&rio_config_lock, flags); \
|
|
res = mport->ops->cread(mport->id, destid, hopcount, offset, len, &data); \
|
|
*value = (type)data; \
|
|
spin_unlock_irqrestore(&rio_config_lock, flags); \
|
|
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) \
|
|
{ \
|
|
int res; \
|
|
unsigned long flags; \
|
|
if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
|
|
spin_lock_irqsave(&rio_config_lock, flags); \
|
|
res = mport->ops->cwrite(mport->id, destid, hopcount, offset, len, value); \
|
|
spin_unlock_irqrestore(&rio_config_lock, flags); \
|
|
return res; \
|
|
}
|
|
|
|
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)
|
|
{
|
|
int res;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&rio_doorbell_lock, flags);
|
|
res = mport->ops->dsend(mport->id, destid, data);
|
|
spin_unlock_irqrestore(&rio_doorbell_lock, flags);
|
|
|
|
return res;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(rio_mport_send_doorbell);
|