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/skbuff.h> 10 #include <linux/atm.h> 11 #include <linux/atmdev.h> 12 #include <linux/sonet.h> 13 #include <linux/pci.h> 14 15 16 #define DEV_LABEL "zatm" 17 18 #define MAX_AAL5_PDU 10240 /* allocate for AAL5 PDUs of this size */ 19 #define MAX_RX_SIZE_LD 14 /* ceil(log2((MAX_AAL5_PDU+47)/48)) */ 20 21 #define LOW_MARK 12 /* start adding new buffers if less than 12 */ 22 #define HIGH_MARK 30 /* stop adding buffers after reaching 30 */ 23 #define OFF_CNG_THRES 5 /* threshold for offset changes */ 24 25 #define RX_SIZE 2 /* RX lookup entry size (in bytes) */ 26 #define NR_POOLS 32 /* number of free buffer pointers */ 27 #define POOL_SIZE 8 /* buffer entry size (in bytes) */ 28 #define NR_SHAPERS 16 /* number of shapers */ 29 #define SHAPER_SIZE 4 /* shaper entry size (in bytes) */ 30 #define VC_SIZE 32 /* VC dsc (TX or RX) size (in bytes) */ 31 32 #define RING_ENTRIES 32 /* ring entries (without back pointer) */ 33 #define RING_WORDS 4 /* ring element size */ 34 #define RING_SIZE (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS) 35 36 #define NR_MBX 4 /* four mailboxes */ 37 #define MBX_RX_0 0 /* mailbox indices */ 38 #define MBX_RX_1 1 39 #define MBX_TX_0 2 40 #define MBX_TX_1 3 41 42 struct zatm_vcc { 43 /*-------------------------------- RX part */ 44 int rx_chan; /* RX channel, 0 if none */ 45 int pool; /* free buffer pool */ 46 /*-------------------------------- TX part */ 47 int tx_chan; /* TX channel, 0 if none */ 48 int shaper; /* shaper, <0 if none */ 49 struct sk_buff_head tx_queue; /* list of buffers in transit */ 50 wait_queue_head_t tx_wait; /* for close */ 51 u32 *ring; /* transmit ring */ 52 int ring_curr; /* current write position */ 53 int txing; /* number of transmits in progress */ 54 struct sk_buff_head backlog; /* list of buffers waiting for ring */ 55 }; 56 57 struct zatm_dev { 58 /*-------------------------------- TX part */ 59 int tx_bw; /* remaining bandwidth */ 60 u32 free_shapers; /* bit set */ 61 int ubr; /* UBR shaper; -1 if none */ 62 int ubr_ref_cnt; /* number of VCs using UBR shaper */ 63 /*-------------------------------- RX part */ 64 int pool_ref[NR_POOLS]; /* free buffer pool usage counters */ 65 volatile struct sk_buff *last_free[NR_POOLS]; 66 /* last entry in respective pool */ 67 struct sk_buff_head pool[NR_POOLS];/* free buffer pools */ 68 struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */ 69 /*-------------------------------- maps */ 70 struct atm_vcc **tx_map; /* TX VCCs */ 71 struct atm_vcc **rx_map; /* RX VCCs */ 72 int chans; /* map size, must be 2^n */ 73 /*-------------------------------- mailboxes */ 74 unsigned long mbx_start[NR_MBX];/* start addresses */ 75 dma_addr_t mbx_dma[NR_MBX]; 76 u16 mbx_end[NR_MBX]; /* end offset (in bytes) */ 77 /*-------------------------------- other pointers */ 78 u32 pool_base; /* Free buffer pool dsc (word addr) */ 79 /*-------------------------------- ZATM links */ 80 struct atm_dev *more; /* other ZATM devices */ 81 /*-------------------------------- general information */ 82 int mem; /* RAM on board (in bytes) */ 83 int khz; /* timer clock */ 84 int copper; /* PHY type */ 85 unsigned char irq; /* IRQ */ 86 unsigned int base; /* IO base address */ 87 struct pci_dev *pci_dev; /* PCI stuff */ 88 spinlock_t lock; 89 }; 90 91 92 #define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data) 93 #define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data) 94 95 96 struct zatm_skb_prv { 97 struct atm_skb_data _; /* reserved */ 98 u32 *dsc; /* pointer to skb's descriptor */ 99 }; 100 101 #define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc) 102 103 #endif 104