mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
126a3fd251
- add eni_do_release() to balance eni_do_init - turn the zeroes DMA area into a per device data Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: David S. Miller <davem@davemloft.net>
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* 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
|