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: 92dcffb916d309aa01778bf8963a6932e4014d07 authored by Linus Torvalds on 21 January 2010, 23:31:35 UTC
Linux 2.6.33-rc5
Linux 2.6.33-rc5
Tip revision: 92dcffb
shdma.h
/*
* Renesas SuperH DMA Engine support
*
* Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
* Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
*
* This 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.
*
*/
#ifndef __DMA_SHDMA_H
#define __DMA_SHDMA_H
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
struct sh_dmae_regs {
u32 sar; /* SAR / source address */
u32 dar; /* DAR / destination address */
u32 tcr; /* TCR / transfer count */
};
struct sh_desc {
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
dma_cookie_t cookie;
int chunks;
int mark;
};
struct device;
struct sh_dmae_chan {
dma_cookie_t completed_cookie; /* The maximum cookie completed */
spinlock_t desc_lock; /* Descriptor operation lock */
struct list_head ld_queue; /* Link descriptors queue */
struct list_head ld_free; /* Link descriptors free */
struct dma_chan common; /* DMA common channel */
struct device *dev; /* Channel device */
struct tasklet_struct tasklet; /* Tasklet */
int descs_allocated; /* desc count */
int id; /* Raw id of this channel */
char dev_id[16]; /* unique name per DMAC of channel */
/* Set chcr */
int (*set_chcr)(struct sh_dmae_chan *sh_chan, u32 regs);
/* Set DMA resource */
int (*set_dmars)(struct sh_dmae_chan *sh_chan, u16 res);
};
struct sh_dmae_device {
struct dma_device common;
struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
struct sh_dmae_pdata pdata;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)
#define to_sh_desc(lh) container_of(lh, struct sh_desc, node)
#define tx_to_sh_desc(tx) container_of(tx, struct sh_desc, async_tx)
#endif /* __DMA_SHDMA_H */