File: /usr/src/linux/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 unsigned long start; /* counting in bytes */
37 int order;
38 };
39
40 struct eni_tx {
41 unsigned long 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 unsigned long 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 struct timeval 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 unsigned long phy; /* PHY interface chip registers */
76 unsigned long reg; /* register base */
77 unsigned long ram; /* RAM base */
78 unsigned long vci; /* VCI table */
79 unsigned long rx_dma; /* RX DMA queue */
80 unsigned long tx_dma; /* TX DMA queue */
81 unsigned long 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
131