/* 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