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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 | |
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 *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 | |
124 | struct 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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