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