zatm.h
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上传日期:2013-04-10
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- /* 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