1 /* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #ifndef DRIVER_ATM_ENI_H 7 #define DRIVER_ATM_ENI_H 8 9 #include <linux/atm.h> 10 #include <linux/atmdev.h> 11 #include <linux/sonet.h> 12 #include <linux/skbuff.h> 13 #include <linux/time.h> 14 #include <linux/pci.h> 15 #include <linux/spinlock.h> 16 #include <asm/atomic.h> 17 18 #include "midway.h" 19 20 21 #define KERNEL_OFFSET 0xC0000000 /* kernel 0x0 is at phys 0xC0000000 */ 22 #define DEV_LABEL "eni" 23 24 #define UBR_BUFFER (128*1024) /* UBR buffer size */ 25 26 #define RX_DMA_BUF 8 /* burst and skip a few things */ 27 #define TX_DMA_BUF 100 /* should be enough for 64 kB */ 28 29 #define DEFAULT_RX_MULT 300 /* max_sdu*3 */ 30 #define DEFAULT_TX_MULT 300 /* max_sdu*3 */ 31 32 #define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */ 33 34 35 struct eni_free { 36 unsigned long start; /* counting in bytes */ 37 int order; 38 }; 39 40 struct eni_tx { 41 unsigned long send; /* base, 0 if unused */ 42 int prescaler; /* shaping prescaler */ 43 int resolution; /* shaping divider */ 44 unsigned long tx_pos; /* current TX write position */ 45 unsigned long words; /* size of TX queue */ 46 int index; /* TX channel number */ 47 int reserved; /* reserved peak cell rate */ 48 int shaping; /* shaped peak cell rate */ 49 struct sk_buff_head backlog; /* queue of waiting TX buffers */ 50 }; 51 52 struct eni_vcc { 53 int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */ 54 unsigned long recv; /* receive buffer */ 55 unsigned long words; /* its size in words */ 56 unsigned long descr; /* next descriptor (RX) */ 57 unsigned long rx_pos; /* current RX descriptor pos */ 58 struct eni_tx *tx; /* TXer, NULL if none */ 59 int rxing; /* number of pending PDUs */ 60 int servicing; /* number of waiting VCs (0 or 1) */ 61 int txing; /* number of pending TX bytes */ 62 struct timeval timestamp; /* for RX timing */ 63 struct atm_vcc *next; /* next pending RX */ 64 struct sk_buff *last; /* last PDU being DMAed (used to carry 65 discard information) */ 66 }; 67 68 struct eni_dev { 69 /*-------------------------------- spinlock */ 70 spinlock_t lock; /* sync with interrupt */ 71 struct tasklet_struct task; /* tasklet for interrupt work */ 72 u32 events; /* pending events */ 73 /*-------------------------------- base pointers into Midway address 74 space */ 75 unsigned long phy; /* PHY interface chip registers */ 76 unsigned long reg; /* register base */ 77 unsigned long ram; /* RAM base */ 78 unsigned long vci; /* VCI table */ 79 unsigned long rx_dma; /* RX DMA queue */ 80 unsigned long tx_dma; /* TX DMA queue */ 81 unsigned long service; /* service list */ 82 /*-------------------------------- TX part */ 83 struct eni_tx tx[NR_CHAN]; /* TX channels */ 84 struct eni_tx *ubr; /* UBR channel */ 85 struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/ 86 wait_queue_head_t tx_wait; /* for close */ 87 int tx_bw; /* remaining bandwidth */ 88 u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */ 89 int tx_mult; /* buffer size multiplier (percent) */ 90 /*-------------------------------- RX part */ 91 u32 serv_read; /* host service read index */ 92 struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */ 93 struct atm_vcc *slow,*last_slow; 94 struct atm_vcc **rx_map; /* for fast lookups */ 95 struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */ 96 wait_queue_head_t rx_wait; /* for close */ 97 int rx_mult; /* buffer size multiplier (percent) */ 98 /*-------------------------------- statistics */ 99 unsigned long lost; /* number of lost cells (RX) */ 100 /*-------------------------------- memory management */ 101 unsigned long base_diff; /* virtual-real base address */ 102 int free_len; /* free list length */ 103 struct eni_free *free_list; /* free list */ 104 int free_list_size; /* maximum size of free list */ 105 /*-------------------------------- ENI links */ 106 struct atm_dev *more; /* other ENI devices */ 107 /*-------------------------------- general information */ 108 int mem; /* RAM on board (in bytes) */ 109 int asic; /* PCI interface type, 0 for FPGA */ 110 unsigned int irq; /* IRQ */ 111 struct pci_dev *pci_dev; /* PCI stuff */ 112 }; 113 114 115 #define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data) 116 #define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data) 117 118 119 struct eni_skb_prv { 120 struct atm_skb_data _; /* reserved */ 121 unsigned long pos; /* position of next descriptor */ 122 int size; /* PDU size in reassembly buffer */ 123 dma_addr_t paddr; /* DMA handle */ 124 }; 125 126 #define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size) 127 #define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos) 128 #define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr) 129 130 #endif 131