1 /* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */
2
3 /* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #ifndef DRIVER_ATM_ZATM_H
7 #define DRIVER_ATM_ZATM_H
8
9 #include <linux/config.h>
10 #include <linux/skbuff.h>
11 #include <linux/atm.h>
12 #include <linux/atmdev.h>
13 #include <linux/sonet.h>
14 #include <linux/pci.h>
15
16
17 #define DEV_LABEL "zatm"
18
19 #define MAX_AAL5_PDU 10240 /* allocate for AAL5 PDUs of this size */
20 #define MAX_RX_SIZE_LD 14 /* ceil(log2((MAX_AAL5_PDU+47)/48)) */
21
22 #define LOW_MARK 12 /* start adding new buffers if less than 12 */
23 #define HIGH_MARK 30 /* stop adding buffers after reaching 30 */
24 #define OFF_CNG_THRES 5 /* threshold for offset changes */
25
26 #define RX_SIZE 2 /* RX lookup entry size (in bytes) */
27 #define NR_POOLS 32 /* number of free buffer pointers */
28 #define POOL_SIZE 8 /* buffer entry size (in bytes) */
29 #define NR_SHAPERS 16 /* number of shapers */
30 #define SHAPER_SIZE 4 /* shaper entry size (in bytes) */
31 #define VC_SIZE 32 /* VC dsc (TX or RX) size (in bytes) */
32
33 #define RING_ENTRIES 32 /* ring entries (without back pointer) */
34 #define RING_WORDS 4 /* ring element size */
35 #define RING_SIZE (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS)
36
37 #define NR_MBX 4 /* four mailboxes */
38 #define MBX_RX_0 0 /* mailbox indices */
39 #define MBX_RX_1 1
40 #define MBX_TX_0 2
41 #define MBX_TX_1 3
42
43
44 /*
45 * mkdep doesn't spot this dependency, but that's okay, because zatm.c uses
46 * CONFIG_ATM_ZATM_EXACT_TS too.
47 */
48
49 #ifdef CONFIG_ATM_ZATM_EXACT_TS
50 #define POLL_INTERVAL 60 /* TSR poll interval in seconds; must be <=
51 (2^31-1)/clock */
52 #define TIMER_SHIFT 20 /* scale factor for fixed-point arithmetic;
53 1 << TIMER_SHIFT must be
54 (1) <= (2^64-1)/(POLL_INTERVAL*clock),
55 (2) >> clock/10^6, and
56 (3) <= (2^32-1)/1000 */
57 #define ADJ_IGN_THRES 1000000 /* don't adjust if we're off by more than that
58 many usecs - this filters clock corrections,
59 time zone changes, etc. */
60 #define ADJ_REP_THRES 20000 /* report only differences of more than that
61 many usecs (don't mention single lost timer
62 ticks; 10 msec is only 0.03% anyway) */
63 #define ADJ_MSG_THRES 5 /* issue complaints only if getting that many
64 significant timer differences in a row */
65 #endif
66
67
68 struct zatm_vcc {
69 /*-------------------------------- RX part */
70 int rx_chan; /* RX channel, 0 if none */
71 int pool; /* free buffer pool */
72 /*-------------------------------- TX part */
73 int tx_chan; /* TX channel, 0 if none */
74 int shaper; /* shaper, <0 if none */
75 struct sk_buff_head tx_queue; /* list of buffers in transit */
76 wait_queue_head_t tx_wait; /* for close */
77 u32 *ring; /* transmit ring */
78 int ring_curr; /* current write position */
79 int txing; /* number of transmits in progress */
80 struct sk_buff_head backlog; /* list of buffers waiting for ring */
81 };
82
83 struct zatm_dev {
84 /*-------------------------------- TX part */
85 int tx_bw; /* remaining bandwidth */
86 u32 free_shapers; /* bit set */
87 int ubr; /* UBR shaper; -1 if none */
88 int ubr_ref_cnt; /* number of VCs using UBR shaper */
89 /*-------------------------------- RX part */
90 int pool_ref[NR_POOLS]; /* free buffer pool usage counters */
91 volatile struct sk_buff *last_free[NR_POOLS];
92 /* last entry in respective pool */
93 struct sk_buff_head pool[NR_POOLS];/* free buffer pools */
94 struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */
95 /*-------------------------------- maps */
96 struct atm_vcc **tx_map; /* TX VCCs */
97 struct atm_vcc **rx_map; /* RX VCCs */
98 int chans; /* map size, must be 2^n */
99 /*-------------------------------- mailboxes */
100 unsigned long mbx_start[NR_MBX];/* start addresses */
101 u16 mbx_end[NR_MBX]; /* end offset (in bytes) */
102 /*-------------------------------- other pointers */
103 u32 pool_base; /* Free buffer pool dsc (word addr) */
104 /*-------------------------------- ZATM links */
105 struct atm_dev *more; /* other ZATM devices */
106 #ifdef CONFIG_ATM_ZATM_EXACT_TS
107 /*-------------------------------- timestamp calculation */
108 u32 last_clk; /* results of last poll: clock, */
109 struct timeval last_time; /* virtual time and */
110 struct timeval last_real_time; /* real time */
111 u32 factor; /* multiplication factor */
112 int timer_diffs; /* number of significant deviations */
113 struct zatm_t_hist timer_history[ZATM_TIMER_HISTORY_SIZE];
114 /* record of timer synchronizations */
115 int th_curr; /* current position */
116 #endif
117 /*-------------------------------- general information */
118 int mem; /* RAM on board (in bytes) */
119 int khz; /* timer clock */
120 int copper; /* PHY type */
121 unsigned char irq; /* IRQ */
122 unsigned int base; /* IO base address */
123 struct pci_dev *pci_dev; /* PCI stuff */
124 };
125
126
127 #define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data)
128 #define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data)
129
130
131 struct zatm_skb_prv {
132 struct atm_skb_data _; /* reserved */
133 u32 *dsc; /* pointer to skb's descriptor */
134 };
135
136 #define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc)
137
138 #endif
139
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