1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */ |
3 | |
4 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
5 | |
6 | |
7 | #ifndef DRIVER_ATM_ENI_H |
8 | #define DRIVER_ATM_ENI_H |
9 | |
10 | #include <linux/atm.h> |
11 | #include <linux/atmdev.h> |
12 | #include <linux/interrupt.h> |
13 | #include <linux/sonet.h> |
14 | #include <linux/skbuff.h> |
15 | #include <linux/time.h> |
16 | #include <linux/pci.h> |
17 | #include <linux/spinlock.h> |
18 | #include <linux/atomic.h> |
19 | |
20 | #include "midway.h" |
21 | |
22 | |
23 | #define DEV_LABEL "eni" |
24 | |
25 | #define UBR_BUFFER (128*1024) /* UBR buffer size */ |
26 | |
27 | #define RX_DMA_BUF 8 /* burst and skip a few things */ |
28 | #define TX_DMA_BUF 100 /* should be enough for 64 kB */ |
29 | |
30 | #define DEFAULT_RX_MULT 300 /* max_sdu*3 */ |
31 | #define DEFAULT_TX_MULT 300 /* max_sdu*3 */ |
32 | |
33 | #define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */ |
34 | |
35 | |
36 | struct eni_free { |
37 | void __iomem *start; /* counting in bytes */ |
38 | int order; |
39 | }; |
40 | |
41 | struct eni_tx { |
42 | void __iomem *send; /* base, 0 if unused */ |
43 | int prescaler; /* shaping prescaler */ |
44 | int resolution; /* shaping divider */ |
45 | unsigned long tx_pos; /* current TX write position */ |
46 | unsigned long words; /* size of TX queue */ |
47 | int index; /* TX channel number */ |
48 | int reserved; /* reserved peak cell rate */ |
49 | int shaping; /* shaped peak cell rate */ |
50 | struct sk_buff_head backlog; /* queue of waiting TX buffers */ |
51 | }; |
52 | |
53 | struct eni_vcc { |
54 | int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */ |
55 | void __iomem *recv; /* receive buffer */ |
56 | unsigned long words; /* its size in words */ |
57 | unsigned long descr; /* next descriptor (RX) */ |
58 | unsigned long rx_pos; /* current RX descriptor pos */ |
59 | struct eni_tx *tx; /* TXer, NULL if none */ |
60 | int rxing; /* number of pending PDUs */ |
61 | int servicing; /* number of waiting VCs (0 or 1) */ |
62 | int txing; /* number of pending TX bytes */ |
63 | ktime_t timestamp; /* for RX timing */ |
64 | struct atm_vcc *next; /* next pending RX */ |
65 | struct sk_buff *last; /* last PDU being DMAed (used to carry |
66 | discard information) */ |
67 | }; |
68 | |
69 | struct eni_dev { |
70 | /*-------------------------------- spinlock */ |
71 | spinlock_t lock; /* sync with interrupt */ |
72 | struct tasklet_struct task; /* tasklet for interrupt work */ |
73 | u32 events; /* pending events */ |
74 | /*-------------------------------- base pointers into Midway address |
75 | space */ |
76 | void __iomem *ioaddr; |
77 | void __iomem *phy; /* PHY interface chip registers */ |
78 | void __iomem *reg; /* register base */ |
79 | void __iomem *ram; /* RAM base */ |
80 | void __iomem *vci; /* VCI table */ |
81 | void __iomem *rx_dma; /* RX DMA queue */ |
82 | void __iomem *tx_dma; /* TX DMA queue */ |
83 | void __iomem *service; /* service list */ |
84 | /*-------------------------------- TX part */ |
85 | struct eni_tx tx[NR_CHAN]; /* TX channels */ |
86 | struct eni_tx *ubr; /* UBR channel */ |
87 | struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/ |
88 | wait_queue_head_t tx_wait; /* for close */ |
89 | int tx_bw; /* remaining bandwidth */ |
90 | u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */ |
91 | struct eni_zero { /* aligned "magic" zeroes */ |
92 | u32 *addr; |
93 | dma_addr_t dma; |
94 | } zero; |
95 | int tx_mult; /* buffer size multiplier (percent) */ |
96 | /*-------------------------------- RX part */ |
97 | u32 serv_read; /* host service read index */ |
98 | struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */ |
99 | struct atm_vcc *slow,*last_slow; |
100 | struct atm_vcc **rx_map; /* for fast lookups */ |
101 | struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */ |
102 | wait_queue_head_t rx_wait; /* for close */ |
103 | int rx_mult; /* buffer size multiplier (percent) */ |
104 | /*-------------------------------- statistics */ |
105 | unsigned long lost; /* number of lost cells (RX) */ |
106 | /*-------------------------------- memory management */ |
107 | unsigned long base_diff; /* virtual-real base address */ |
108 | int free_len; /* free list length */ |
109 | struct eni_free *free_list; /* free list */ |
110 | int free_list_size; /* maximum size of free list */ |
111 | /*-------------------------------- ENI links */ |
112 | struct atm_dev *more; /* other ENI devices */ |
113 | /*-------------------------------- general information */ |
114 | int mem; /* RAM on board (in bytes) */ |
115 | int asic; /* PCI interface type, 0 for FPGA */ |
116 | unsigned int irq; /* IRQ */ |
117 | struct pci_dev *pci_dev; /* PCI stuff */ |
118 | }; |
119 | |
120 | |
121 | #define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data) |
122 | #define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data) |
123 | |
124 | |
125 | struct eni_skb_prv { |
126 | struct atm_skb_data _; /* reserved */ |
127 | unsigned long pos; /* position of next descriptor */ |
128 | int size; /* PDU size in reassembly buffer */ |
129 | dma_addr_t paddr; /* DMA handle */ |
130 | }; |
131 | |
132 | #define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size) |
133 | #define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos) |
134 | #define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr) |
135 | |
136 | #endif |
137 | |