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/* 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/sonet.h>

#include <linux/skbuff.h>

#include <linux/time.h>

#include <linux/pci.h>

#include <linux/spinlock.h>

#include <asm/atomic.h>

#include "midway.h"

#define KERNEL_OFFSET   0xC0000000      /* kernel 0x0 is at phys 0xC0000000 */

#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 {

        unsigned long start;            /* counting in bytes */

        int order;

};

struct eni_tx {

        unsigned long 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 */

        unsigned long 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 */

        struct timeval 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 */

        unsigned long phy;              /* PHY interface chip registers */

        unsigned long reg;              /* register base */

        unsigned long ram;              /* RAM base */

        unsigned long vci;              /* VCI table */

        unsigned long rx_dma;           /* RX DMA queue */

        unsigned long tx_dma;           /* TX DMA queue */

        unsigned long 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 */

        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