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 68struct 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 83struct 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 131struct 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