https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 9e1ff307c779ce1f0f810c7ecce3d95bbae40896 authored by Linus Torvalds on 03 October 2021, 21:08:47 UTC
Linux 5.15-rc4
Linux 5.15-rc4
Tip revision: 9e1ff30
logic_iomem.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2021 Intel Corporation
* Author: johannes@sipsolutions.net
*/
#ifndef __LOGIC_IOMEM_H
#define __LOGIC_IOMEM_H
#include <linux/types.h>
#include <linux/ioport.h>
/**
* struct logic_iomem_ops - emulated IO memory ops
* @read: read an 8, 16, 32 or 64 bit quantity from the given offset,
* size is given in bytes (1, 2, 4 or 8)
* (64-bit only necessary if CONFIG_64BIT is set)
* @write: write an 8, 16 32 or 64 bit quantity to the given offset,
* size is given in bytes (1, 2, 4 or 8)
* (64-bit only necessary if CONFIG_64BIT is set)
* @set: optional, for memset_io()
* @copy_from: optional, for memcpy_fromio()
* @copy_to: optional, for memcpy_toio()
* @unmap: optional, this region is getting unmapped
*/
struct logic_iomem_ops {
unsigned long (*read)(void *priv, unsigned int offset, int size);
void (*write)(void *priv, unsigned int offset, int size,
unsigned long val);
void (*set)(void *priv, unsigned int offset, u8 value, int size);
void (*copy_from)(void *priv, void *buffer, unsigned int offset,
int size);
void (*copy_to)(void *priv, unsigned int offset, const void *buffer,
int size);
void (*unmap)(void *priv);
};
/**
* struct logic_iomem_region_ops - ops for an IO memory handler
* @map: map a range in the registered IO memory region, must
* fill *ops with the ops and may fill *priv to be passed
* to the ops. The offset is given as the offset into the
* registered resource region.
* The return value is negative for errors, or >= 0 for
* success. On success, the return value is added to the
* offset for later ops, to allow for partial mappings.
*/
struct logic_iomem_region_ops {
long (*map)(unsigned long offset, size_t size,
const struct logic_iomem_ops **ops,
void **priv);
};
/**
* logic_iomem_add_region - register an IO memory region
* @resource: the resource description for this region
* @ops: the IO memory mapping ops for this resource
*/
int logic_iomem_add_region(struct resource *resource,
const struct logic_iomem_region_ops *ops);
#endif /* __LOGIC_IOMEM_H */