1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */ 3 4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 5 6 7 #ifndef DRIVER_ATM_ENI_H 8 #define DRIVER_ATM_ENI_H 9 10 #include <linux/atm.h> 11 #include <linux/atmdev.h> 12 #include <linux/interrupt.h> 13 #include <linux/sonet.h> 14 #include <linux/skbuff.h> 15 #include <linux/time.h> 16 #include <linux/pci.h> 17 #include <linux/spinlock.h> 18 #include <linux/atomic.h> 19 20 #include "midway.h" 21 22 23 #define DEV_LABEL "eni" 24 25 #define UBR_BUFFER (128*1024) /* UBR buffer size */ 26 27 #define RX_DMA_BUF 8 /* burst and skip a few things */ 28 #define TX_DMA_BUF 100 /* should be enough for 64 kB */ 29 30 #define DEFAULT_RX_MULT 300 /* max_sdu*3 */ 31 #define DEFAULT_TX_MULT 300 /* max_sdu*3 */ 32 33 #define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */ 34 35 36 struct eni_free { 37 void __iomem *start; /* counting in bytes */ 38 int order; 39 }; 40 41 struct eni_tx { 42 void __iomem *send; /* base, 0 if unused */ 43 int prescaler; /* shaping prescaler */ 44 int resolution; /* shaping divider */ 45 unsigned long tx_pos; /* current TX write position */ 46 unsigned long words; /* size of TX queue */ 47 int index; /* TX channel number */ 48 int reserved; /* reserved peak cell rate */ 49 int shaping; /* shaped peak cell rate */ 50 struct sk_buff_head backlog; /* queue of waiting TX buffers */ 51 }; 52 53 struct eni_vcc { 54 int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */ 55 void __iomem *recv; /* receive buffer */ 56 unsigned long words; /* its size in words */ 57 unsigned long descr; /* next descriptor (RX) */ 58 unsigned long rx_pos; /* current RX descriptor pos */ 59 struct eni_tx *tx; /* TXer, NULL if none */ 60 int rxing; /* number of pending PDUs */ 61 int servicing; /* number of waiting VCs (0 or 1) */ 62 int txing; /* number of pending TX bytes */ 63 ktime_t timestamp; /* for RX timing */ 64 struct atm_vcc *next; /* next pending RX */ 65 struct sk_buff *last; /* last PDU being DMAed (used to carry 66 discard information) */ 67 }; 68 69 struct eni_dev { 70 /*-------------------------------- spinlock */ 71 spinlock_t lock; /* sync with interrupt */ 72 struct tasklet_struct task; /* tasklet for interrupt work */ 73 u32 events; /* pending events */ 74 /*-------------------------------- base pointers into Midway address 75 space */ 76 void __iomem *ioaddr; 77 void __iomem *phy; /* PHY interface chip registers */ 78 void __iomem *reg; /* register base */ 79 void __iomem *ram; /* RAM base */ 80 void __iomem *vci; /* VCI table */ 81 void __iomem *rx_dma; /* RX DMA queue */ 82 void __iomem *tx_dma; /* TX DMA queue */ 83 void __iomem *service; /* service list */ 84 /*-------------------------------- TX part */ 85 struct eni_tx tx[NR_CHAN]; /* TX channels */ 86 struct eni_tx *ubr; /* UBR channel */ 87 struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/ 88 wait_queue_head_t tx_wait; /* for close */ 89 int tx_bw; /* remaining bandwidth */ 90 u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */ 91 struct eni_zero { /* aligned "magic" zeroes */ 92 u32 *addr; 93 dma_addr_t dma; 94 } zero; 95 int tx_mult; /* buffer size multiplier (percent) */ 96 /*-------------------------------- RX part */ 97 u32 serv_read; /* host service read index */ 98 struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */ 99 struct atm_vcc *slow,*last_slow; 100 struct atm_vcc **rx_map; /* for fast lookups */ 101 struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */ 102 wait_queue_head_t rx_wait; /* for close */ 103 int rx_mult; /* buffer size multiplier (percent) */ 104 /*-------------------------------- statistics */ 105 unsigned long lost; /* number of lost cells (RX) */ 106 /*-------------------------------- memory management */ 107 unsigned long base_diff; /* virtual-real base address */ 108 int free_len; /* free list length */ 109 struct eni_free *free_list; /* free list */ 110 int free_list_size; /* maximum size of free list */ 111 /*-------------------------------- ENI links */ 112 struct atm_dev *more; /* other ENI devices */ 113 /*-------------------------------- general information */ 114 int mem; /* RAM on board (in bytes) */ 115 int asic; /* PCI interface type, 0 for FPGA */ 116 unsigned int irq; /* IRQ */ 117 struct pci_dev *pci_dev; /* PCI stuff */ 118 }; 119 120 121 #define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data) 122 #define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data) 123 124 125 struct eni_skb_prv { 126 struct atm_skb_data _; /* reserved */ 127 unsigned long pos; /* position of next descriptor */ 128 int size; /* PDU size in reassembly buffer */ 129 dma_addr_t paddr; /* DMA handle */ 130 }; 131 132 #define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size) 133 #define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos) 134 #define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr) 135 136 #endif 137