cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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of_dma.h (2353B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * OF helpers for DMA request / controller
      4 *
      5 * Based on of_gpio.h
      6 *
      7 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
      8 */
      9
     10#ifndef __LINUX_OF_DMA_H
     11#define __LINUX_OF_DMA_H
     12
     13#include <linux/of.h>
     14#include <linux/dmaengine.h>
     15
     16struct device_node;
     17
     18struct of_dma {
     19	struct list_head	of_dma_controllers;
     20	struct device_node	*of_node;
     21	struct dma_chan		*(*of_dma_xlate)
     22				(struct of_phandle_args *, struct of_dma *);
     23	void			*(*of_dma_route_allocate)
     24				(struct of_phandle_args *, struct of_dma *);
     25	struct dma_router	*dma_router;
     26	void			*of_dma_data;
     27};
     28
     29struct of_dma_filter_info {
     30	dma_cap_mask_t	dma_cap;
     31	dma_filter_fn	filter_fn;
     32};
     33
     34#ifdef CONFIG_DMA_OF
     35extern int of_dma_controller_register(struct device_node *np,
     36		struct dma_chan *(*of_dma_xlate)
     37		(struct of_phandle_args *, struct of_dma *),
     38		void *data);
     39extern void of_dma_controller_free(struct device_node *np);
     40
     41extern int of_dma_router_register(struct device_node *np,
     42		void *(*of_dma_route_allocate)
     43		(struct of_phandle_args *, struct of_dma *),
     44		struct dma_router *dma_router);
     45#define of_dma_router_free of_dma_controller_free
     46
     47extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
     48						     const char *name);
     49extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
     50		struct of_dma *ofdma);
     51extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
     52		struct of_dma *ofdma);
     53
     54#else
     55static inline int of_dma_controller_register(struct device_node *np,
     56		struct dma_chan *(*of_dma_xlate)
     57		(struct of_phandle_args *, struct of_dma *),
     58		void *data)
     59{
     60	return -ENODEV;
     61}
     62
     63static inline void of_dma_controller_free(struct device_node *np)
     64{
     65}
     66
     67static inline int of_dma_router_register(struct device_node *np,
     68		void *(*of_dma_route_allocate)
     69		(struct of_phandle_args *, struct of_dma *),
     70		struct dma_router *dma_router)
     71{
     72	return -ENODEV;
     73}
     74
     75#define of_dma_router_free of_dma_controller_free
     76
     77static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
     78						     const char *name)
     79{
     80	return ERR_PTR(-ENODEV);
     81}
     82
     83static inline struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
     84		struct of_dma *ofdma)
     85{
     86	return NULL;
     87}
     88
     89#define of_dma_xlate_by_chan_id NULL
     90
     91#endif
     92
     93#endif /* __LINUX_OF_DMA_H */