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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018-2019 Synopsys, Inc. and/or its affiliates.
* Synopsys DesignWare eDMA core driver
*
* Author: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
*/
#ifndef _DW_EDMA_CORE_H
#define _DW_EDMA_CORE_H
#include <linux/msi.h>
#include <linux/dma/edma.h>
#include "../virt-dma.h"
#define EDMA_LL_SZ 24
enum dw_edma_dir {
EDMA_DIR_WRITE = 0,
EDMA_DIR_READ
};
enum dw_edma_request {
EDMA_REQ_NONE = 0,
EDMA_REQ_STOP,
EDMA_REQ_PAUSE
};
enum dw_edma_status {
EDMA_ST_IDLE = 0,
EDMA_ST_PAUSE,
EDMA_ST_BUSY
};
enum dw_edma_xfer_type {
EDMA_XFER_SCATTER_GATHER = 0,
EDMA_XFER_CYCLIC,
EDMA_XFER_INTERLEAVED
};
struct dw_edma_chan;
struct dw_edma_chunk;
struct dw_edma_burst {
struct list_head list;
u64 sar;
u64 dar;
u32 sz;
};
struct dw_edma_chunk {
struct list_head list;
struct dw_edma_chan *chan;
struct dw_edma_burst *burst;
u32 bursts_alloc;
u8 cb;
struct dw_edma_region ll_region; /* Linked list */
};
struct dw_edma_desc {
struct virt_dma_desc vd;
struct dw_edma_chan *chan;
struct dw_edma_chunk *chunk;
u32 chunks_alloc;
u32 alloc_sz;
u32 xfer_sz;
};
struct dw_edma_chan {
struct virt_dma_chan vc;
struct dw_edma *dw;
int id;
enum dw_edma_dir dir;
u32 ll_max;
struct msi_msg msi;
enum dw_edma_request request;
enum dw_edma_status status;
u8 configured;
struct dma_slave_config config;
};
struct dw_edma_irq {
struct msi_msg msi;
u32 wr_mask;
u32 rd_mask;
struct dw_edma *dw;
};
struct dw_edma {
char name[20];
struct dma_device wr_edma;
u16 wr_ch_cnt;
struct dma_device rd_edma;
u16 rd_ch_cnt;
struct dw_edma_irq *irq;
int nr_irqs;
struct dw_edma_chan *chan;
raw_spinlock_t lock; /* Only for legacy */
struct dw_edma_chip *chip;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif /* CONFIG_DEBUG_FS */
};
struct dw_edma_sg {
struct scatterlist *sgl;
unsigned int len;
};
struct dw_edma_cyclic {
dma_addr_t paddr;
size_t len;
size_t cnt;
};
struct dw_edma_transfer {
struct dma_chan *dchan;
union dw_edma_xfer {
struct dw_edma_sg sg;
struct dw_edma_cyclic cyclic;
struct dma_interleaved_template *il;
} xfer;
enum dma_transfer_direction direction;
unsigned long flags;
enum dw_edma_xfer_type type;
};
static inline
struct dw_edma_chan *vc2dw_edma_chan(struct virt_dma_chan *vc)
{
return container_of(vc, struct dw_edma_chan, vc);
}
static inline
struct dw_edma_chan *dchan2dw_edma_chan(struct dma_chan *dchan)
{
return vc2dw_edma_chan(to_virt_chan(dchan));
}
#endif /* _DW_EDMA_CORE_H */
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