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linux-stable/include/linux/rio_drv.h
Sebastian Andrzej Siewior 5c7b3280d2 rapidio: remove unused rio_get_asm() and rio_get_device() 
The functions rio_get_asm() and rio_get_device() are globally exported
but have almost no users in tree. The only user is rio_init_mports()
which invokes it via rio_init().

rio_init() iterates over every registered device and invokes
rio_fixup_device().  It looks like a fixup function which should perform a
"change" to the device but does nothing.  It has been like this since its
introduction in commit 394b701ce4 ("[PATCH] RapidIO support: core
base") which was merged into v2.6.15-rc1.

Remove rio_init() because the performed fixup function
(rio_fixup_device()) does nothing.  Remove rio_get_asm() and
rio_get_device() which have no callers now.

Link: https://lkml.kernel.org/r/20201116170004.420143-1-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 22:46:18 -08:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* RapidIO driver services
*
* Copyright 2005 MontaVista Software, Inc.
* Matt Porter <mporter@kernel.crashing.org>
*/
#ifndef LINUX_RIO_DRV_H
#define LINUX_RIO_DRV_H
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/rio.h>
extern int __rio_local_read_config_32(struct rio_mport *port, u32 offset,
u32 * data);
extern int __rio_local_write_config_32(struct rio_mport *port, u32 offset,
u32 data);
extern int __rio_local_read_config_16(struct rio_mport *port, u32 offset,
u16 * data);
extern int __rio_local_write_config_16(struct rio_mport *port, u32 offset,
u16 data);
extern int __rio_local_read_config_8(struct rio_mport *port, u32 offset,
u8 * data);
extern int __rio_local_write_config_8(struct rio_mport *port, u32 offset,
u8 data);
extern int rio_mport_read_config_32(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u32 * data);
extern int rio_mport_write_config_32(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u32 data);
extern int rio_mport_read_config_16(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u16 * data);
extern int rio_mport_write_config_16(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u16 data);
extern int rio_mport_read_config_8(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u8 * data);
extern int rio_mport_write_config_8(struct rio_mport *port, u16 destid,
u8 hopcount, u32 offset, u8 data);
/**
* rio_local_read_config_32 - Read 32 bits from local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Pointer to read data into
*
* Reads 32 bits of data from the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_read_config_32(struct rio_mport *port, u32 offset,
u32 * data)
{
return __rio_local_read_config_32(port, offset, data);
}
/**
* rio_local_write_config_32 - Write 32 bits to local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Data to be written
*
* Writes 32 bits of data to the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_write_config_32(struct rio_mport *port, u32 offset,
u32 data)
{
return __rio_local_write_config_32(port, offset, data);
}
/**
* rio_local_read_config_16 - Read 16 bits from local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Pointer to read data into
*
* Reads 16 bits of data from the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_read_config_16(struct rio_mport *port, u32 offset,
u16 * data)
{
return __rio_local_read_config_16(port, offset, data);
}
/**
* rio_local_write_config_16 - Write 16 bits to local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Data to be written
*
* Writes 16 bits of data to the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_write_config_16(struct rio_mport *port, u32 offset,
u16 data)
{
return __rio_local_write_config_16(port, offset, data);
}
/**
* rio_local_read_config_8 - Read 8 bits from local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Pointer to read data into
*
* Reads 8 bits of data from the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_read_config_8(struct rio_mport *port, u32 offset,
u8 * data)
{
return __rio_local_read_config_8(port, offset, data);
}
/**
* rio_local_write_config_8 - Write 8 bits to local configuration space
* @port: Master port
* @offset: Offset into local configuration space
* @data: Data to be written
*
* Writes 8 bits of data to the specified offset within the local
* device's configuration space.
*/
static inline int rio_local_write_config_8(struct rio_mport *port, u32 offset,
u8 data)
{
return __rio_local_write_config_8(port, offset, data);
}
/**
* rio_read_config_32 - Read 32 bits from configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Pointer to read data into
*
* Reads 32 bits of data from the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_read_config_32(struct rio_dev *rdev, u32 offset,
u32 * data)
{
return rio_mport_read_config_32(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
/**
* rio_write_config_32 - Write 32 bits to configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Data to be written
*
* Writes 32 bits of data to the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_write_config_32(struct rio_dev *rdev, u32 offset,
u32 data)
{
return rio_mport_write_config_32(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
/**
* rio_read_config_16 - Read 16 bits from configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Pointer to read data into
*
* Reads 16 bits of data from the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_read_config_16(struct rio_dev *rdev, u32 offset,
u16 * data)
{
return rio_mport_read_config_16(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
/**
* rio_write_config_16 - Write 16 bits to configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Data to be written
*
* Writes 16 bits of data to the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_write_config_16(struct rio_dev *rdev, u32 offset,
u16 data)
{
return rio_mport_write_config_16(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
/**
* rio_read_config_8 - Read 8 bits from configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Pointer to read data into
*
* Reads 8 bits of data from the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_read_config_8(struct rio_dev *rdev, u32 offset, u8 * data)
{
return rio_mport_read_config_8(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
/**
* rio_write_config_8 - Write 8 bits to configuration space
* @rdev: RIO device
* @offset: Offset into device configuration space
* @data: Data to be written
*
* Writes 8 bits of data to the specified offset within the
* RIO device's configuration space.
*/
static inline int rio_write_config_8(struct rio_dev *rdev, u32 offset, u8 data)
{
return rio_mport_write_config_8(rdev->net->hport, rdev->destid,
rdev->hopcount, offset, data);
};
extern int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid,
u16 data);
/**
* rio_send_doorbell - Send a doorbell message to a device
* @rdev: RIO device
* @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.
*/
static inline int rio_send_doorbell(struct rio_dev *rdev, u16 data)
{
return rio_mport_send_doorbell(rdev->net->hport, rdev->destid, data);
};
/**
* rio_init_mbox_res - Initialize a RIO mailbox resource
* @res: resource struct
* @start: start of mailbox range
* @end: end of mailbox range
*
* This function is used to initialize the fields of a resource
* for use as a mailbox resource. It initializes a range of
* mailboxes using the start and end arguments.
*/
static inline void rio_init_mbox_res(struct resource *res, int start, int end)
{
memset(res, 0, sizeof(struct resource));
res->start = start;
res->end = end;
res->flags = RIO_RESOURCE_MAILBOX;
}
/**
* rio_init_dbell_res - Initialize a RIO doorbell resource
* @res: resource struct
* @start: start of doorbell range
* @end: end of doorbell range
*
* This function is used to initialize the fields of a resource
* for use as a doorbell resource. It initializes a range of
* doorbell messages using the start and end arguments.
*/
static inline void rio_init_dbell_res(struct resource *res, u16 start, u16 end)
{
memset(res, 0, sizeof(struct resource));
res->start = start;
res->end = end;
res->flags = RIO_RESOURCE_DOORBELL;
}
/**
* RIO_DEVICE - macro used to describe a specific RIO device
* @dev: the 16 bit RIO device ID
* @ven: the 16 bit RIO vendor ID
*
* This macro is used to create a struct rio_device_id that matches a
* specific device. The assembly vendor and assembly device fields
* will be set to %RIO_ANY_ID.
*/
#define RIO_DEVICE(dev,ven) \
.did = (dev), .vid = (ven), \
.asm_did = RIO_ANY_ID, .asm_vid = RIO_ANY_ID
/* Mailbox management */
extern int rio_request_outb_mbox(struct rio_mport *, void *, int, int,
void (*)(struct rio_mport *, void *,int, int));
extern int rio_release_outb_mbox(struct rio_mport *, int);
/**
* rio_add_outb_message - Add RIO message to an outbound mailbox queue
* @mport: RIO master port containing the outbound queue
* @rdev: RIO device the message is be sent to
* @mbox: The outbound mailbox queue
* @buffer: Pointer to the message buffer
* @len: Length of the message buffer
*
* Adds a RIO message buffer to an outbound mailbox queue for
* transmission. Returns 0 on success.
*/
static inline int rio_add_outb_message(struct rio_mport *mport,
struct rio_dev *rdev, int mbox,
void *buffer, size_t len)
{
return mport->ops->add_outb_message(mport, rdev, mbox,
buffer, len);
}
extern int rio_request_inb_mbox(struct rio_mport *, void *, int, int,
void (*)(struct rio_mport *, void *, int, int));
extern int rio_release_inb_mbox(struct rio_mport *, int);
/**
* rio_add_inb_buffer - Add buffer to an inbound mailbox queue
* @mport: Master port containing the inbound mailbox
* @mbox: The inbound mailbox number
* @buffer: Pointer to the message buffer
*
* Adds a buffer to an inbound mailbox queue for reception. Returns
* 0 on success.
*/
static inline int rio_add_inb_buffer(struct rio_mport *mport, int mbox,
void *buffer)
{
return mport->ops->add_inb_buffer(mport, mbox, buffer);
}
/**
* rio_get_inb_message - Get A RIO message from an inbound mailbox queue
* @mport: Master port containing the inbound mailbox
* @mbox: The inbound mailbox number
*
* Get a RIO message from an inbound mailbox queue. Returns 0 on success.
*/
static inline void *rio_get_inb_message(struct rio_mport *mport, int mbox)
{
return mport->ops->get_inb_message(mport, mbox);
}
/* Doorbell management */
extern int rio_request_inb_dbell(struct rio_mport *, void *, u16, u16,
void (*)(struct rio_mport *, void *, u16, u16, u16));
extern int rio_release_inb_dbell(struct rio_mport *, u16, u16);
extern struct resource *rio_request_outb_dbell(struct rio_dev *, u16, u16);
extern int rio_release_outb_dbell(struct rio_dev *, struct resource *);
/* Memory region management */
int rio_claim_resource(struct rio_dev *, int);
int rio_request_regions(struct rio_dev *, char *);
void rio_release_regions(struct rio_dev *);
int rio_request_region(struct rio_dev *, int, char *);
void rio_release_region(struct rio_dev *, int);
/* Memory mapping functions */
extern int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
u64 rbase, u32 size, u32 rflags);
extern void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart);
extern int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase,
u32 size, u32 rflags, dma_addr_t *local);
extern void rio_unmap_outb_region(struct rio_mport *mport,
u16 destid, u64 rstart);
/* Port-Write management */
extern int rio_request_inb_pwrite(struct rio_dev *,
int (*)(struct rio_dev *, union rio_pw_msg*, int));
extern int rio_release_inb_pwrite(struct rio_dev *);
extern int rio_add_mport_pw_handler(struct rio_mport *mport, void *dev_id,
int (*pwcback)(struct rio_mport *mport, void *dev_id,
union rio_pw_msg *msg, int step));
extern int rio_del_mport_pw_handler(struct rio_mport *mport, void *dev_id,
int (*pwcback)(struct rio_mport *mport, void *dev_id,
union rio_pw_msg *msg, int step));
extern int rio_inb_pwrite_handler(struct rio_mport *mport,
union rio_pw_msg *pw_msg);
extern void rio_pw_enable(struct rio_mport *mport, int enable);
/* LDM support */
int rio_register_driver(struct rio_driver *);
void rio_unregister_driver(struct rio_driver *);
struct rio_dev *rio_dev_get(struct rio_dev *);
void rio_dev_put(struct rio_dev *);
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
extern struct dma_chan *rio_request_dma(struct rio_dev *rdev);
extern struct dma_chan *rio_request_mport_dma(struct rio_mport *mport);
extern void rio_release_dma(struct dma_chan *dchan);
extern struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(
struct rio_dev *rdev, struct dma_chan *dchan,
struct rio_dma_data *data,
enum dma_transfer_direction direction, unsigned long flags);
extern struct dma_async_tx_descriptor *rio_dma_prep_xfer(
struct dma_chan *dchan, u16 destid,
struct rio_dma_data *data,
enum dma_transfer_direction direction, unsigned long flags);
#endif
/**
* rio_name - Get the unique RIO device identifier
* @rdev: RIO device
*
* Get the unique RIO device identifier. Returns the device
* identifier string.
*/
static inline const char *rio_name(struct rio_dev *rdev)
{
return dev_name(&rdev->dev);
}
/**
* rio_get_drvdata - Get RIO driver specific data
* @rdev: RIO device
*
* Get RIO driver specific data. Returns a pointer to the
* driver specific data.
*/
static inline void *rio_get_drvdata(struct rio_dev *rdev)
{
return dev_get_drvdata(&rdev->dev);
}
/**
* rio_set_drvdata - Set RIO driver specific data
* @rdev: RIO device
* @data: Pointer to driver specific data
*
* Set RIO driver specific data. device struct driver data pointer
* is set to the @data argument.
*/
static inline void rio_set_drvdata(struct rio_dev *rdev, void *data)
{
dev_set_drvdata(&rdev->dev, data);
}
/* Misc driver helpers */
extern u16 rio_local_get_device_id(struct rio_mport *port);
extern void rio_local_set_device_id(struct rio_mport *port, u16 did);
extern int rio_init_mports(void);
#endif /* LINUX_RIO_DRV_H */
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