| /* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */ |
| |
| /* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */ |
| |
| |
| #ifndef DRIVER_ATM_ZATM_H |
| #define DRIVER_ATM_ZATM_H |
| |
| #include <linux/config.h> |
| #include <linux/skbuff.h> |
| #include <linux/atm.h> |
| #include <linux/atmdev.h> |
| #include <linux/sonet.h> |
| #include <linux/pci.h> |
| |
| |
| #define DEV_LABEL "zatm" |
| |
| #define MAX_AAL5_PDU 10240 /* allocate for AAL5 PDUs of this size */ |
| #define MAX_RX_SIZE_LD 14 /* ceil(log2((MAX_AAL5_PDU+47)/48)) */ |
| |
| #define LOW_MARK 12 /* start adding new buffers if less than 12 */ |
| #define HIGH_MARK 30 /* stop adding buffers after reaching 30 */ |
| #define OFF_CNG_THRES 5 /* threshold for offset changes */ |
| |
| #define RX_SIZE 2 /* RX lookup entry size (in bytes) */ |
| #define NR_POOLS 32 /* number of free buffer pointers */ |
| #define POOL_SIZE 8 /* buffer entry size (in bytes) */ |
| #define NR_SHAPERS 16 /* number of shapers */ |
| #define SHAPER_SIZE 4 /* shaper entry size (in bytes) */ |
| #define VC_SIZE 32 /* VC dsc (TX or RX) size (in bytes) */ |
| |
| #define RING_ENTRIES 32 /* ring entries (without back pointer) */ |
| #define RING_WORDS 4 /* ring element size */ |
| #define RING_SIZE (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS) |
| |
| #define NR_MBX 4 /* four mailboxes */ |
| #define MBX_RX_0 0 /* mailbox indices */ |
| #define MBX_RX_1 1 |
| #define MBX_TX_0 2 |
| #define MBX_TX_1 3 |
| |
| |
| /* |
| * mkdep doesn't spot this dependency, but that's okay, because zatm.c uses |
| * CONFIG_ATM_ZATM_EXACT_TS too. |
| */ |
| |
| #ifdef CONFIG_ATM_ZATM_EXACT_TS |
| #define POLL_INTERVAL 60 /* TSR poll interval in seconds; must be <= |
| (2^31-1)/clock */ |
| #define TIMER_SHIFT 20 /* scale factor for fixed-point arithmetic; |
| 1 << TIMER_SHIFT must be |
| (1) <= (2^64-1)/(POLL_INTERVAL*clock), |
| (2) >> clock/10^6, and |
| (3) <= (2^32-1)/1000 */ |
| #define ADJ_IGN_THRES 1000000 /* don't adjust if we're off by more than that |
| many usecs - this filters clock corrections, |
| time zone changes, etc. */ |
| #define ADJ_REP_THRES 20000 /* report only differences of more than that |
| many usecs (don't mention single lost timer |
| ticks; 10 msec is only 0.03% anyway) */ |
| #define ADJ_MSG_THRES 5 /* issue complaints only if getting that many |
| significant timer differences in a row */ |
| #endif |
| |
| |
| struct zatm_vcc { |
| /*-------------------------------- RX part */ |
| int rx_chan; /* RX channel, 0 if none */ |
| int pool; /* free buffer pool */ |
| /*-------------------------------- TX part */ |
| int tx_chan; /* TX channel, 0 if none */ |
| int shaper; /* shaper, <0 if none */ |
| struct sk_buff_head tx_queue; /* list of buffers in transit */ |
| wait_queue_head_t tx_wait; /* for close */ |
| u32 *ring; /* transmit ring */ |
| int ring_curr; /* current write position */ |
| int txing; /* number of transmits in progress */ |
| struct sk_buff_head backlog; /* list of buffers waiting for ring */ |
| }; |
| |
| struct zatm_dev { |
| /*-------------------------------- TX part */ |
| int tx_bw; /* remaining bandwidth */ |
| u32 free_shapers; /* bit set */ |
| int ubr; /* UBR shaper; -1 if none */ |
| int ubr_ref_cnt; /* number of VCs using UBR shaper */ |
| /*-------------------------------- RX part */ |
| int pool_ref[NR_POOLS]; /* free buffer pool usage counters */ |
| volatile struct sk_buff *last_free[NR_POOLS]; |
| /* last entry in respective pool */ |
| struct sk_buff_head pool[NR_POOLS];/* free buffer pools */ |
| struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */ |
| /*-------------------------------- maps */ |
| struct atm_vcc **tx_map; /* TX VCCs */ |
| struct atm_vcc **rx_map; /* RX VCCs */ |
| int chans; /* map size, must be 2^n */ |
| /*-------------------------------- mailboxes */ |
| unsigned long mbx_start[NR_MBX];/* start addresses */ |
| u16 mbx_end[NR_MBX]; /* end offset (in bytes) */ |
| /*-------------------------------- other pointers */ |
| u32 pool_base; /* Free buffer pool dsc (word addr) */ |
| /*-------------------------------- ZATM links */ |
| struct atm_dev *more; /* other ZATM devices */ |
| #ifdef CONFIG_ATM_ZATM_EXACT_TS |
| /*-------------------------------- timestamp calculation */ |
| u32 last_clk; /* results of last poll: clock, */ |
| struct timeval last_time; /* virtual time and */ |
| struct timeval last_real_time; /* real time */ |
| u32 factor; /* multiplication factor */ |
| int timer_diffs; /* number of significant deviations */ |
| struct zatm_t_hist timer_history[ZATM_TIMER_HISTORY_SIZE]; |
| /* record of timer synchronizations */ |
| int th_curr; /* current position */ |
| #endif |
| /*-------------------------------- general information */ |
| int mem; /* RAM on board (in bytes) */ |
| int khz; /* timer clock */ |
| int copper; /* PHY type */ |
| unsigned char irq; /* IRQ */ |
| unsigned int base; /* IO base address */ |
| struct pci_dev *pci_dev; /* PCI stuff */ |
| }; |
| |
| |
| #define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data) |
| #define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data) |
| |
| |
| struct zatm_skb_prv { |
| struct atm_skb_data _; /* reserved */ |
| u32 *dsc; /* pointer to skb's descriptor */ |
| }; |
| |
| #define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc) |
| |
| #endif |