diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/atm/eni.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/atm/eni.h b/drivers/atm/eni.h new file mode 100644 index 000000000..de1ed802c --- /dev/null +++ b/drivers/atm/eni.h @@ -0,0 +1,136 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#ifndef DRIVER_ATM_ENI_H +#define DRIVER_ATM_ENI_H + +#include <linux/atm.h> +#include <linux/atmdev.h> +#include <linux/interrupt.h> +#include <linux/sonet.h> +#include <linux/skbuff.h> +#include <linux/time.h> +#include <linux/pci.h> +#include <linux/spinlock.h> +#include <linux/atomic.h> + +#include "midway.h" + + +#define DEV_LABEL "eni" + +#define UBR_BUFFER (128*1024) /* UBR buffer size */ + +#define RX_DMA_BUF 8 /* burst and skip a few things */ +#define TX_DMA_BUF 100 /* should be enough for 64 kB */ + +#define DEFAULT_RX_MULT 300 /* max_sdu*3 */ +#define DEFAULT_TX_MULT 300 /* max_sdu*3 */ + +#define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */ + + +struct eni_free { + void __iomem *start; /* counting in bytes */ + int order; +}; + +struct eni_tx { + void __iomem *send; /* base, 0 if unused */ + int prescaler; /* shaping prescaler */ + int resolution; /* shaping divider */ + unsigned long tx_pos; /* current TX write position */ + unsigned long words; /* size of TX queue */ + int index; /* TX channel number */ + int reserved; /* reserved peak cell rate */ + int shaping; /* shaped peak cell rate */ + struct sk_buff_head backlog; /* queue of waiting TX buffers */ +}; + +struct eni_vcc { + int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */ + void __iomem *recv; /* receive buffer */ + unsigned long words; /* its size in words */ + unsigned long descr; /* next descriptor (RX) */ + unsigned long rx_pos; /* current RX descriptor pos */ + struct eni_tx *tx; /* TXer, NULL if none */ + int rxing; /* number of pending PDUs */ + int servicing; /* number of waiting VCs (0 or 1) */ + int txing; /* number of pending TX bytes */ + ktime_t timestamp; /* for RX timing */ + struct atm_vcc *next; /* next pending RX */ + struct sk_buff *last; /* last PDU being DMAed (used to carry + discard information) */ +}; + +struct eni_dev { + /*-------------------------------- spinlock */ + spinlock_t lock; /* sync with interrupt */ + struct tasklet_struct task; /* tasklet for interrupt work */ + u32 events; /* pending events */ + /*-------------------------------- base pointers into Midway address + space */ + void __iomem *ioaddr; + void __iomem *phy; /* PHY interface chip registers */ + void __iomem *reg; /* register base */ + void __iomem *ram; /* RAM base */ + void __iomem *vci; /* VCI table */ + void __iomem *rx_dma; /* RX DMA queue */ + void __iomem *tx_dma; /* TX DMA queue */ + void __iomem *service; /* service list */ + /*-------------------------------- TX part */ + struct eni_tx tx[NR_CHAN]; /* TX channels */ + struct eni_tx *ubr; /* UBR channel */ + struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/ + wait_queue_head_t tx_wait; /* for close */ + int tx_bw; /* remaining bandwidth */ + u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */ + struct eni_zero { /* aligned "magic" zeroes */ + u32 *addr; + dma_addr_t dma; + } zero; + int tx_mult; /* buffer size multiplier (percent) */ + /*-------------------------------- RX part */ + u32 serv_read; /* host service read index */ + struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */ + struct atm_vcc *slow,*last_slow; + struct atm_vcc **rx_map; /* for fast lookups */ + struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */ + wait_queue_head_t rx_wait; /* for close */ + int rx_mult; /* buffer size multiplier (percent) */ + /*-------------------------------- statistics */ + unsigned long lost; /* number of lost cells (RX) */ + /*-------------------------------- memory management */ + unsigned long base_diff; /* virtual-real base address */ + int free_len; /* free list length */ + struct eni_free *free_list; /* free list */ + int free_list_size; /* maximum size of free list */ + /*-------------------------------- ENI links */ + struct atm_dev *more; /* other ENI devices */ + /*-------------------------------- general information */ + int mem; /* RAM on board (in bytes) */ + int asic; /* PCI interface type, 0 for FPGA */ + unsigned int irq; /* IRQ */ + struct pci_dev *pci_dev; /* PCI stuff */ +}; + + +#define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data) +#define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data) + + +struct eni_skb_prv { + struct atm_skb_data _; /* reserved */ + unsigned long pos; /* position of next descriptor */ + int size; /* PDU size in reassembly buffer */ + dma_addr_t paddr; /* DMA handle */ +}; + +#define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size) +#define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos) +#define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr) + +#endif |