/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 2006 - 2009 ( C ) DENX Software Engineering .
*
* Author : Yuri Tikhonov < yur @ emcraft . com >
*/
#ifndef _PPC440SPE_ADMA_H
#define _PPC440SPE_ADMA_H
#include <linux/types.h>
#include "dma.h"
#include "xor.h"
#define to_ppc440spe_adma_chan(chan) \
container_of(chan, struct ppc440spe_adma_chan, common)
#define to_ppc440spe_adma_device(dev) \
container_of(dev, struct ppc440spe_adma_device, common)
#define tx_to_ppc440spe_adma_slot(tx) \
container_of(tx, struct ppc440spe_adma_desc_slot, async_tx)
/* Default polynomial (for 440SP is only available) */
#define PPC440SPE_DEFAULT_POLY 0 x4d
#define PPC440SPE_ADMA_ENGINES_NUM (XOR_ENGINES_NUM + DMA_ENGINES_NUM)
#define PPC440SPE_ADMA_WATCHDOG_MSEC 3
#define PPC440SPE_ADMA_THRESHOLD 1
#define PPC440SPE_DMA0_ID 0
#define PPC440SPE_DMA1_ID 1
#define PPC440SPE_XOR_ID 2
#define PPC440SPE_ADMA_DMA_MAX_BYTE_COUNT 0 xFFFFFFUL
/* this is the XOR_CBBCR width */
#define PPC440SPE_ADMA_XOR_MAX_BYTE_COUNT (1 << 31 )
#define PPC440SPE_ADMA_ZERO_SUM_MAX_BYTE_COUNT PPC440SPE_ADMA_XOR_MAX_BYTE_COUNT
#define PPC440SPE_RXOR_RUN 0
#define MQ0_CF2H_RXOR_BS_MASK 0 x1FF
#undef ADMA_LL_DEBUG
/**
* struct ppc440spe_adma_device - internal representation of an ADMA device
* @ dev : device
* @ dma_reg : base for DMAx register access
* @ xor_reg : base for XOR register access
* @ i2o_reg : base for I2O register access
* @ id : HW ADMA Device selector
* @ dma_desc_pool_virt : base of DMA descriptor region ( CPU address )
* @ dma_desc_pool : base of DMA descriptor region ( DMA address )
* @ pool_size : size of the pool
* @ irq : DMAx or XOR irq number
* @ err_irq : DMAx error irq number
* @ common : embedded struct dma_device
*/
struct ppc440spe_adma_device {
struct device *dev;
struct dma_regs __iomem *dma_reg;
struct xor_regs __iomem *xor_reg;
struct i2o_regs __iomem *i2o_reg;
int id;
void *dma_desc_pool_virt;
dma_addr_t dma_desc_pool;
size_t pool_size;
int irq;
int err_irq;
struct dma_device common;
};
/**
* struct ppc440spe_adma_chan - internal representation of an ADMA channel
* @ lock : serializes enqueue / dequeue operations to the slot pool
* @ device : parent device
* @ chain : device chain view of the descriptors
* @ common : common dmaengine channel object members
* @ all_slots : complete domain of slots usable by the channel
* @ pending : allows batching of hardware operations
* @ slots_allocated : records the actual size of the descriptor slot pool
* @ hw_chain_inited : h / w descriptor chain initialization flag
* @ irq_tasklet : bottom half where ppc440spe_adma_slot_cleanup runs
* @ needs_unmap : if buffers should not be unmapped upon final processing
* @ pdest_page : P destination page for async validate operation
* @ qdest_page : Q destination page for async validate operation
* @ pdest : P dma addr for async validate operation
* @ qdest : Q dma addr for async validate operation
*/
struct ppc440spe_adma_chan {
spinlock_t lock;
struct ppc440spe_adma_device *device;
struct list_head chain;
struct dma_chan common;
struct list_head all_slots;
struct ppc440spe_adma_desc_slot *last_used;
int pending;
int slots_allocated;
int hw_chain_inited;
struct tasklet_struct irq_tasklet;
u8 needs_unmap;
struct page *pdest_page;
struct page *qdest_page;
dma_addr_t pdest;
dma_addr_t qdest;
};
struct ppc440spe_rxor {
u32 addrl;
u32 addrh;
int len;
int xor_count;
int addr_count;
int desc_count;
int state;
};
/**
* struct ppc440spe_adma_desc_slot - PPC440SPE - ADMA software descriptor
* @ phys : hardware address of the hardware descriptor chain
* @ group_head : first operation in a transaction
* @ hw_next : pointer to the next descriptor in chain
* @ async_tx : support for the async_tx api
* @ slot_node : node on the iop_adma_chan . all_slots list
* @ chain_node : node on the op_adma_chan . chain list
* @ group_list : list of slots that make up a multi - descriptor transaction
* for example transfer lengths larger than the supported hw max
* @ unmap_len : transaction bytecount
* @ hw_desc : virtual address of the hardware descriptor chain
* @ stride : currently chained or not
* @ idx : pool index
* @ slot_cnt : total slots used in an transaction ( group of operations )
* @ src_cnt : number of sources set in this descriptor
* @ dst_cnt : number of destinations set in the descriptor
* @ slots_per_op : number of slots per operation
* @ descs_per_op : number of slot per P / Q operation see comment
* for ppc440spe_prep_dma_pqxor function
* @ flags : desc state / type
* @ reverse_flags : 1 if a corresponding rxor address uses reversed address order
* @ xor_check_result : result of zero sum
* @ crc32_result : result crc calculation
*/
struct ppc440spe_adma_desc_slot {
dma_addr_t phys;
struct ppc440spe_adma_desc_slot *group_head;
struct ppc440spe_adma_desc_slot *hw_next;
struct dma_async_tx_descriptor async_tx;
struct list_head slot_node;
struct list_head chain_node; /* node in channel ops list */
struct list_head group_list; /* list */
unsigned int unmap_len;
void *hw_desc;
u16 stride;
u16 idx;
u16 slot_cnt;
u8 src_cnt;
u8 dst_cnt;
u8 slots_per_op;
u8 descs_per_op;
unsigned long flags;
unsigned long reverse_flags[8 ];
#define PPC440SPE_DESC_INT 0 /* generate interrupt on complete */
#define PPC440SPE_ZERO_P 1 /* clear P destionaion */
#define PPC440SPE_ZERO_Q 2 /* clear Q destination */
#define PPC440SPE_COHERENT 3 /* src/dst are coherent */
#define PPC440SPE_DESC_WXOR 4 /* WXORs are in chain */
#define PPC440SPE_DESC_RXOR 5 /* RXOR is in chain */
#define PPC440SPE_DESC_RXOR123 8 /* CDB for RXOR123 operation */
#define PPC440SPE_DESC_RXOR124 9 /* CDB for RXOR124 operation */
#define PPC440SPE_DESC_RXOR125 10 /* CDB for RXOR125 operation */
#define PPC440SPE_DESC_RXOR12 11 /* CDB for RXOR12 operation */
#define PPC440SPE_DESC_RXOR_REV 12 /* CDB has srcs in reversed order */
#define PPC440SPE_DESC_PCHECK 13
#define PPC440SPE_DESC_QCHECK 14
#define PPC440SPE_DESC_RXOR_MSK 0 x3
struct ppc440spe_rxor rxor_cursor;
union {
u32 *xor_check_result;
u32 *crc32_result;
};
};
#endif /* _PPC440SPE_ADMA_H */
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