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Release 4.17 drivers/atm/eni.h

Directory: drivers/atm
/* SPDX-License-Identifier: GPL-2.0 */
/* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */
 
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
 
 
#ifndef DRIVER_ATM_ENI_H

#define DRIVER_ATM_ENI_H

#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/interrupt.h>
#include <linux/sonet.h>
#include <linux/skbuff.h>
#include <linux/time.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/atomic.h>

#include "midway.h"



#define DEV_LABEL	"eni"


#define UBR_BUFFER	(128*1024)	
/* UBR buffer size */


#define RX_DMA_BUF	  8		
/* burst and skip a few things */

#define TX_DMA_BUF	100		
/* should be enough for 64 kB */


#define DEFAULT_RX_MULT	300		
/* max_sdu*3 */

#define DEFAULT_TX_MULT	300		
/* max_sdu*3 */


#define ENI_ZEROES_SIZE	  4		
/* need that many DMA-able zero bytes */



struct eni_free {
	
void __iomem *start;		/* counting in bytes */
	
int order;
};


struct eni_tx {
	
void __iomem *send;		/* base, 0 if unused */
	
int prescaler;			/* shaping prescaler */
	
int resolution;			/* shaping divider */
	
unsigned long tx_pos;		/* current TX write position */
	
unsigned long words;		/* size of TX queue */
	
int index;			/* TX channel number */
	
int reserved;			/* reserved peak cell rate */
	
int shaping;			/* shaped peak cell rate */
	
struct sk_buff_head backlog;	/* queue of waiting TX buffers */
};


struct eni_vcc {
	
int (*rx)(struct atm_vcc *vcc);	/* RX function, NULL if none */
	
void __iomem *recv;		/* receive buffer */
	
unsigned long words;		/* its size in words */
	
unsigned long descr;		/* next descriptor (RX) */
	
unsigned long rx_pos;		/* current RX descriptor pos */
	
struct eni_tx *tx;		/* TXer, NULL if none */
	
int rxing;			/* number of pending PDUs */
	
int servicing;			/* number of waiting VCs (0 or 1) */
	
int txing;			/* number of pending TX bytes */
	
ktime_t timestamp;		/* for RX timing */
	
struct atm_vcc *next;		/* next pending RX */
	
struct sk_buff *last;		/* last PDU being DMAed (used to carry
                                           discard information) */
};


struct eni_dev {
	/*-------------------------------- spinlock */
	
spinlock_t lock;		/* sync with interrupt */
	
struct tasklet_struct task;	/* tasklet for interrupt work */
	
u32 events;			/* pending events */
	/*-------------------------------- base pointers into Midway address
                                           space */
	
void __iomem *ioaddr;
	
void __iomem *phy;		/* PHY interface chip registers */
	
void __iomem *reg;		/* register base */
	
void __iomem *ram;		/* RAM base */
	
void __iomem *vci;		/* VCI table */
	
void __iomem *rx_dma;		/* RX DMA queue */
	
void __iomem *tx_dma;		/* TX DMA queue */
	
void __iomem *service;		/* service list */
	/*-------------------------------- TX part */
	
struct eni_tx tx[NR_CHAN];	/* TX channels */
	
struct eni_tx *ubr;		/* UBR channel */
	
struct sk_buff_head tx_queue;	/* PDUs currently being TX DMAed*/
	
wait_queue_head_t tx_wait;	/* for close */
	
int tx_bw;			/* remaining bandwidth */
	
u32 dma[TX_DMA_BUF*2];		/* DMA request scratch area */
	
struct eni_zero {		/* aligned "magic" zeroes */
		
u32 *addr;
		
dma_addr_t dma;
	
} zero;
	
int tx_mult;			/* buffer size multiplier (percent) */
	/*-------------------------------- RX part */
	
u32 serv_read;			/* host service read index */
	

struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */
	

struct atm_vcc *slow,*last_slow;
	
struct atm_vcc **rx_map;	/* for fast lookups */
	
struct sk_buff_head rx_queue;	/* PDUs currently being RX-DMAed */
	
wait_queue_head_t rx_wait;	/* for close */
	
int rx_mult;			/* buffer size multiplier (percent) */
	/*-------------------------------- statistics */
	
unsigned long lost;		/* number of lost cells (RX) */
	/*-------------------------------- memory management */
	
unsigned long base_diff;	/* virtual-real base address */
	
int free_len;			/* free list length */
	
struct eni_free *free_list;	/* free list */
	
int free_list_size;		/* maximum size of free list */
	/*-------------------------------- ENI links */
	
struct atm_dev *more;		/* other ENI devices */
	/*-------------------------------- general information */
	
int mem;			/* RAM on board (in bytes) */
	
int asic;			/* PCI interface type, 0 for FPGA */
	
unsigned int irq;		/* IRQ */
	
struct pci_dev *pci_dev;	/* PCI stuff */
};



#define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data)

#define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data)



struct eni_skb_prv {
	
struct atm_skb_data _;		/* reserved */
	
unsigned long pos;		/* position of next descriptor */
	
int size;			/* PDU size in reassembly buffer */
	
dma_addr_t paddr;		/* DMA handle */
};


#define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size)

#define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos)

#define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr)

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)42888.61%545.45%
Chas Williams306.21%19.09%
François Romieu193.93%19.09%
Alexey Dobriyan30.62%19.09%
Hideaki Yoshifuji / 吉藤英明10.21%19.09%
Greg Kroah-Hartman10.21%19.09%
Arun Sharma10.21%19.09%
Total483100.00%11100.00%
Directory: drivers/atm
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