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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/*
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* ACPI helpers for DMA request / controller
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*
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* Based on of_dma.h
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*
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* Copyright (C) 2013, Intel Corporation
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* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __LINUX_ACPI_DMA_H
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#define __LINUX_ACPI_DMA_H
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#include <linux/list.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/dmaengine.h>
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/**
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* struct acpi_dma_spec - slave device DMA resources
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* @chan_id: channel unique id
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* @slave_id: request line unique id
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* @dev: struct device of the DMA controller to be used in the filter
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* function
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*/
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struct acpi_dma_spec {
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int chan_id;
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int slave_id;
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struct device *dev;
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};
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/**
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* struct acpi_dma - representation of the registered DMAC
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* @dma_controllers: linked list node
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* @dev: struct device of this controller
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* @acpi_dma_xlate: callback function to find a suitable channel
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* @data: private data used by a callback function
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* @base_request_line: first supported request line (CSRT)
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* @end_request_line: last supported request line (CSRT)
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*/
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struct acpi_dma {
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struct list_head dma_controllers;
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struct device *dev;
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struct dma_chan *(*acpi_dma_xlate)
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(struct acpi_dma_spec *, struct acpi_dma *);
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void *data;
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unsigned short base_request_line;
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unsigned short end_request_line;
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};
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/* Used with acpi_dma_simple_xlate() */
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struct acpi_dma_filter_info {
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dma_cap_mask_t dma_cap;
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dma_filter_fn filter_fn;
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};
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#ifdef CONFIG_DMA_ACPI
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int acpi_dma_controller_register(struct device *dev,
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struct dma_chan *(*acpi_dma_xlate)
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(struct acpi_dma_spec *, struct acpi_dma *),
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void *data);
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int acpi_dma_controller_free(struct device *dev);
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int devm_acpi_dma_controller_register(struct device *dev,
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struct dma_chan *(*acpi_dma_xlate)
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(struct acpi_dma_spec *, struct acpi_dma *),
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void *data);
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void devm_acpi_dma_controller_free(struct device *dev);
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struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
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size_t index);
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struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
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const char *name);
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struct dma_chan *acpi_dma_simple_xlate(struct acpi_dma_spec *dma_spec,
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struct acpi_dma *adma);
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#else
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static inline int acpi_dma_controller_register(struct device *dev,
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struct dma_chan *(*acpi_dma_xlate)
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(struct acpi_dma_spec *, struct acpi_dma *),
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void *data)
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{
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return -ENODEV;
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}
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static inline int acpi_dma_controller_free(struct device *dev)
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{
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return -ENODEV;
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}
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static inline int devm_acpi_dma_controller_register(struct device *dev,
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struct dma_chan *(*acpi_dma_xlate)
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(struct acpi_dma_spec *, struct acpi_dma *),
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void *data)
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{
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return -ENODEV;
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}
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static inline void devm_acpi_dma_controller_free(struct device *dev)
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{
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}
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static inline struct dma_chan *acpi_dma_request_slave_chan_by_index(
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struct device *dev, size_t index)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dma_chan *acpi_dma_request_slave_chan_by_name(
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struct device *dev, const char *name)
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{
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return ERR_PTR(-ENODEV);
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}
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#define acpi_dma_simple_xlate NULL
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#endif
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#define acpi_dma_request_slave_channel acpi_dma_request_slave_chan_by_index
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#endif /* __LINUX_ACPI_DMA_H */
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