Root/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/interrupt.h>
12#include <linux/sonet.h>
13#include <linux/skbuff.h>
14#include <linux/time.h>
15#include <linux/pci.h>
16#include <linux/spinlock.h>
17#include <linux/atomic.h>
18
19#include "midway.h"
20
21
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
35struct eni_free {
36    void __iomem *start; /* counting in bytes */
37    int order;
38};
39
40struct 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
52struct 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
68struct 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 *ioaddr;
76    void __iomem *phy; /* PHY interface chip registers */
77    void __iomem *reg; /* register base */
78    void __iomem *ram; /* RAM base */
79    void __iomem *vci; /* VCI table */
80    void __iomem *rx_dma; /* RX DMA queue */
81    void __iomem *tx_dma; /* TX DMA queue */
82    void __iomem *service; /* service list */
83    /*-------------------------------- TX part */
84    struct eni_tx tx[NR_CHAN]; /* TX channels */
85    struct eni_tx *ubr; /* UBR channel */
86    struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/
87    wait_queue_head_t tx_wait; /* for close */
88    int tx_bw; /* remaining bandwidth */
89    u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */
90    struct eni_zero { /* aligned "magic" zeroes */
91        u32 *addr;
92        dma_addr_t dma;
93    } zero;
94    int tx_mult; /* buffer size multiplier (percent) */
95    /*-------------------------------- RX part */
96    u32 serv_read; /* host service read index */
97    struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */
98    struct atm_vcc *slow,*last_slow;
99    struct atm_vcc **rx_map; /* for fast lookups */
100    struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */
101    wait_queue_head_t rx_wait; /* for close */
102    int rx_mult; /* buffer size multiplier (percent) */
103    /*-------------------------------- statistics */
104    unsigned long lost; /* number of lost cells (RX) */
105    /*-------------------------------- memory management */
106    unsigned long base_diff; /* virtual-real base address */
107    int free_len; /* free list length */
108    struct eni_free *free_list; /* free list */
109    int free_list_size; /* maximum size of free list */
110    /*-------------------------------- ENI links */
111    struct atm_dev *more; /* other ENI devices */
112    /*-------------------------------- general information */
113    int mem; /* RAM on board (in bytes) */
114    int asic; /* PCI interface type, 0 for FPGA */
115    unsigned int irq; /* IRQ */
116    struct pci_dev *pci_dev; /* PCI stuff */
117};
118
119
120#define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data)
121#define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data)
122
123
124struct eni_skb_prv {
125    struct atm_skb_data _; /* reserved */
126    unsigned long pos; /* position of next descriptor */
127    int size; /* PDU size in reassembly buffer */
128    dma_addr_t paddr; /* DMA handle */
129};
130
131#define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size)
132#define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos)
133#define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr)
134
135#endif
136

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