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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 {
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 *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 */
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
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