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136 lines
4.6 KiB
136 lines
4.6 KiB
/* 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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