137 lines
4.6 KiB
C
137 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#ifndef DRIVER_ATM_ENI_H
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#define DRIVER_ATM_ENI_H
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/interrupt.h>
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#include <linux/sonet.h>
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#include <linux/skbuff.h>
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#include <linux/time.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/atomic.h>
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#include "midway.h"
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#define DEV_LABEL "eni"
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#define UBR_BUFFER (128*1024) /* UBR buffer size */
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#define RX_DMA_BUF 8 /* burst and skip a few things */
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#define TX_DMA_BUF 100 /* should be enough for 64 kB */
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#define DEFAULT_RX_MULT 300 /* max_sdu*3 */
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#define DEFAULT_TX_MULT 300 /* max_sdu*3 */
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#define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */
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struct eni_free {
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void __iomem *start; /* counting in bytes */
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int order;
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};
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struct eni_tx {
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void __iomem *send; /* base, 0 if unused */
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int prescaler; /* shaping prescaler */
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int resolution; /* shaping divider */
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unsigned long tx_pos; /* current TX write position */
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unsigned long words; /* size of TX queue */
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int index; /* TX channel number */
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int reserved; /* reserved peak cell rate */
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int shaping; /* shaped peak cell rate */
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struct sk_buff_head backlog; /* queue of waiting TX buffers */
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};
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struct eni_vcc {
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int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */
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void __iomem *recv; /* receive buffer */
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unsigned long words; /* its size in words */
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unsigned long descr; /* next descriptor (RX) */
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unsigned long rx_pos; /* current RX descriptor pos */
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struct eni_tx *tx; /* TXer, NULL if none */
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int rxing; /* number of pending PDUs */
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int servicing; /* number of waiting VCs (0 or 1) */
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int txing; /* number of pending TX bytes */
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ktime_t timestamp; /* for RX timing */
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struct atm_vcc *next; /* next pending RX */
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struct sk_buff *last; /* last PDU being DMAed (used to carry
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discard information) */
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};
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struct eni_dev {
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/*-------------------------------- spinlock */
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spinlock_t lock; /* sync with interrupt */
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struct tasklet_struct task; /* tasklet for interrupt work */
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u32 events; /* pending events */
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/*-------------------------------- base pointers into Midway address
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space */
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void __iomem *ioaddr;
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void __iomem *phy; /* PHY interface chip registers */
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void __iomem *reg; /* register base */
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void __iomem *ram; /* RAM base */
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void __iomem *vci; /* VCI table */
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void __iomem *rx_dma; /* RX DMA queue */
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void __iomem *tx_dma; /* TX DMA queue */
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void __iomem *service; /* service list */
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/*-------------------------------- TX part */
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struct eni_tx tx[NR_CHAN]; /* TX channels */
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struct eni_tx *ubr; /* UBR channel */
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struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/
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wait_queue_head_t tx_wait; /* for close */
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int tx_bw; /* remaining bandwidth */
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u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */
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struct eni_zero { /* aligned "magic" zeroes */
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u32 *addr;
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dma_addr_t dma;
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} zero;
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int tx_mult; /* buffer size multiplier (percent) */
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/*-------------------------------- RX part */
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u32 serv_read; /* host service read index */
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struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */
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struct atm_vcc *slow,*last_slow;
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struct atm_vcc **rx_map; /* for fast lookups */
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struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */
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wait_queue_head_t rx_wait; /* for close */
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int rx_mult; /* buffer size multiplier (percent) */
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/*-------------------------------- statistics */
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unsigned long lost; /* number of lost cells (RX) */
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/*-------------------------------- memory management */
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unsigned long base_diff; /* virtual-real base address */
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int free_len; /* free list length */
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struct eni_free *free_list; /* free list */
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int free_list_size; /* maximum size of free list */
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/*-------------------------------- ENI links */
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struct atm_dev *more; /* other ENI devices */
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/*-------------------------------- general information */
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int mem; /* RAM on board (in bytes) */
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int asic; /* PCI interface type, 0 for FPGA */
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unsigned int irq; /* IRQ */
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struct pci_dev *pci_dev; /* PCI stuff */
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};
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#define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data)
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#define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data)
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struct eni_skb_prv {
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struct atm_skb_data _; /* reserved */
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unsigned long pos; /* position of next descriptor */
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int size; /* PDU size in reassembly buffer */
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dma_addr_t paddr; /* DMA handle */
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};
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#define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size)
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#define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos)
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#define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr)
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#endif
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