drivers/atm/eni.h

   1 /* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #ifndef DRIVER_ATM_ENI_H
   7 #define DRIVER_ATM_ENI_H
   8
   9 #include <linux/atm.h>
  10 #include <linux/atmdev.h>
  11 #include <linux/sonet.h>
  12 #include <linux/skbuff.h>
  13 #include <linux/time.h>
  14 #include <linux/pci.h>
  15 #include <linux/spinlock.h>
  16 #include <asm/atomic.h>
  17
  18 #include "midway.h"
  19
  20
  21 #define KERNEL_OFFSET   0xC0000000      /* kernel 0x0 is at phys 0xC0000000 */
  22 #define DEV_LABEL       "eni"
  23
  24 #define UBR_BUFFER      (128*1024)      /* UBR buffer size */
  25
  26 #define RX_DMA_BUF        8             /* burst and skip a few things */
  27 #define TX_DMA_BUF      100             /* should be enough for 64 kB */
  28
  29 #define DEFAULT_RX_MULT 300             /* max_sdu*3 */
  30 #define DEFAULT_TX_MULT 300             /* max_sdu*3 */
  31
  32 #define ENI_ZEROES_SIZE   4             /* need that many DMA-able zero bytes */
  33
  34
  35 struct eni_free {
  36         void __iomem *start;            /* counting in bytes */
  37         int order;
  38 };
  39
  40 struct eni_tx {
  41         void __iomem *send;             /* base, 0 if unused */
  42         int prescaler;                  /* shaping prescaler */
  43         int resolution;                 /* shaping divider */
  44         unsigned long tx_pos;           /* current TX write position */
  45         unsigned long words;            /* size of TX queue */
  46         int index;                      /* TX channel number */
  47         int reserved;                   /* reserved peak cell rate */
  48         int shaping;                    /* shaped peak cell rate */
  49         struct sk_buff_head backlog;    /* queue of waiting TX buffers */
  50 };
  51
  52 struct eni_vcc {
  53         int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */
  54         void __iomem *recv;             /* receive buffer */
  55         unsigned long words;            /* its size in words */
  56         unsigned long descr;            /* next descriptor (RX) */
  57         unsigned long rx_pos;           /* current RX descriptor pos */
  58         struct eni_tx *tx;              /* TXer, NULL if none */
  59         int rxing;                      /* number of pending PDUs */
  60         int servicing;                  /* number of waiting VCs (0 or 1) */
  61         int txing;                      /* number of pending TX bytes */
  62         ktime_t timestamp;              /* for RX timing */
  63         struct atm_vcc *next;           /* next pending RX */
  64         struct sk_buff *last;           /* last PDU being DMAed (used to carry
  65                                            discard information) */
  66 };
  67
  68 struct eni_dev {
  69         /*-------------------------------- spinlock */
  70         spinlock_t lock;                /* sync with interrupt */
  71         struct tasklet_struct task;     /* tasklet for interrupt work */
  72         u32 events;                     /* pending events */
  73         /*-------------------------------- base pointers into Midway address
  74                                            space */
  75         void __iomem *phy;              /* PHY interface chip registers */
  76         void __iomem *reg;              /* register base */
  77         void __iomem *ram;              /* RAM base */
  78         void __iomem *vci;              /* VCI table */
  79         void __iomem *rx_dma;           /* RX DMA queue */
  80         void __iomem *tx_dma;           /* TX DMA queue */
  81         void __iomem *service;          /* service list */
  82         /*-------------------------------- TX part */
  83         struct eni_tx tx[NR_CHAN];      /* TX channels */
  84         struct eni_tx *ubr;             /* UBR channel */
  85         struct sk_buff_head tx_queue;   /* PDUs currently being TX DMAed*/
  86         wait_queue_head_t tx_wait;      /* for close */
  87         int tx_bw;                      /* remaining bandwidth */
  88         u32 dma[TX_DMA_BUF*2];          /* DMA request scratch area */
  89         int tx_mult;                    /* buffer size multiplier (percent) */
  90         /*-------------------------------- RX part */
  91         u32 serv_read;                  /* host service read index */
  92         struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */
  93         struct atm_vcc *slow,*last_slow;
  94         struct atm_vcc **rx_map;        /* for fast lookups */
  95         struct sk_buff_head rx_queue;   /* PDUs currently being RX-DMAed */
  96         wait_queue_head_t rx_wait;      /* for close */
  97         int rx_mult;                    /* buffer size multiplier (percent) */
  98         /*-------------------------------- statistics */
  99         unsigned long lost;             /* number of lost cells (RX) */
 100         /*-------------------------------- memory management */
 101         unsigned long base_diff;        /* virtual-real base address */
 102         int free_len;                   /* free list length */
 103         struct eni_free *free_list;     /* free list */
 104         int free_list_size;             /* maximum size of free list */
 105         /*-------------------------------- ENI links */
 106         struct atm_dev *more;           /* other ENI devices */
 107         /*-------------------------------- general information */
 108         int mem;                        /* RAM on board (in bytes) */
 109         int asic;                       /* PCI interface type, 0 for FPGA */
 110         unsigned int irq;               /* IRQ */
 111         struct pci_dev *pci_dev;        /* PCI stuff */
 112 };
 113
 114
 115 #define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data)
 116 #define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data)
 117
 118
 119 struct eni_skb_prv {
 120         struct atm_skb_data _;          /* reserved */
 121         unsigned long pos;              /* position of next descriptor */
 122         int size;                       /* PDU size in reassembly buffer */
 123         dma_addr_t paddr;               /* DMA handle */
 124 };
 125
 126 #define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size)
 127 #define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos)
 128 #define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr)
 129
 130 #endif