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