493 строки
16 KiB
C
493 строки
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
Madge Horizon ATM Adapter driver.
|
|
Copyright (C) 1995-1999 Madge Networks Ltd.
|
|
|
|
*/
|
|
|
|
/*
|
|
IMPORTANT NOTE: Madge Networks no longer makes the adapters
|
|
supported by this driver and makes no commitment to maintain it.
|
|
*/
|
|
|
|
/* too many macros - change to inline functions */
|
|
|
|
#ifndef DRIVER_ATM_HORIZON_H
|
|
#define DRIVER_ATM_HORIZON_H
|
|
|
|
|
|
#ifdef CONFIG_ATM_HORIZON_DEBUG
|
|
#define DEBUG_HORIZON
|
|
#endif
|
|
|
|
#define DEV_LABEL "hrz"
|
|
|
|
#ifndef PCI_VENDOR_ID_MADGE
|
|
#define PCI_VENDOR_ID_MADGE 0x10B6
|
|
#endif
|
|
#ifndef PCI_DEVICE_ID_MADGE_HORIZON
|
|
#define PCI_DEVICE_ID_MADGE_HORIZON 0x1000
|
|
#endif
|
|
|
|
// diagnostic output
|
|
|
|
#define PRINTK(severity,format,args...) \
|
|
printk(severity DEV_LABEL ": " format "\n" , ## args)
|
|
|
|
#ifdef DEBUG_HORIZON
|
|
|
|
#define DBG_ERR 0x0001
|
|
#define DBG_WARN 0x0002
|
|
#define DBG_INFO 0x0004
|
|
#define DBG_VCC 0x0008
|
|
#define DBG_QOS 0x0010
|
|
#define DBG_TX 0x0020
|
|
#define DBG_RX 0x0040
|
|
#define DBG_SKB 0x0080
|
|
#define DBG_IRQ 0x0100
|
|
#define DBG_FLOW 0x0200
|
|
#define DBG_BUS 0x0400
|
|
#define DBG_REGS 0x0800
|
|
#define DBG_DATA 0x1000
|
|
#define DBG_MASK 0x1fff
|
|
|
|
/* the ## prevents the annoying double expansion of the macro arguments */
|
|
/* KERN_INFO is used since KERN_DEBUG often does not make it to the console */
|
|
#define PRINTDB(bits,format,args...) \
|
|
( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format , ## args) : 1 )
|
|
#define PRINTDM(bits,format,args...) \
|
|
( (debug & (bits)) ? printk (format , ## args) : 1 )
|
|
#define PRINTDE(bits,format,args...) \
|
|
( (debug & (bits)) ? printk (format "\n" , ## args) : 1 )
|
|
#define PRINTD(bits,format,args...) \
|
|
( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format "\n" , ## args) : 1 )
|
|
|
|
#else
|
|
|
|
#define PRINTD(bits,format,args...)
|
|
#define PRINTDB(bits,format,args...)
|
|
#define PRINTDM(bits,format,args...)
|
|
#define PRINTDE(bits,format,args...)
|
|
|
|
#endif
|
|
|
|
#define PRINTDD(sec,fmt,args...)
|
|
#define PRINTDDB(sec,fmt,args...)
|
|
#define PRINTDDM(sec,fmt,args...)
|
|
#define PRINTDDE(sec,fmt,args...)
|
|
|
|
// fixed constants
|
|
|
|
#define SPARE_BUFFER_POOL_SIZE MAX_VCS
|
|
#define HRZ_MAX_VPI 4
|
|
#define MIN_PCI_LATENCY 48 // 24 IS TOO SMALL
|
|
|
|
/* Horizon specific bits */
|
|
/* Register offsets */
|
|
|
|
#define HRZ_IO_EXTENT 0x80
|
|
|
|
#define DATA_PORT_OFF 0x00
|
|
#define TX_CHANNEL_PORT_OFF 0x04
|
|
#define TX_DESCRIPTOR_PORT_OFF 0x08
|
|
#define MEMORY_PORT_OFF 0x0C
|
|
#define MEM_WR_ADDR_REG_OFF 0x14
|
|
#define MEM_RD_ADDR_REG_OFF 0x18
|
|
#define CONTROL_0_REG 0x1C
|
|
#define INT_SOURCE_REG_OFF 0x20
|
|
#define INT_ENABLE_REG_OFF 0x24
|
|
#define MASTER_RX_ADDR_REG_OFF 0x28
|
|
#define MASTER_RX_COUNT_REG_OFF 0x2C
|
|
#define MASTER_TX_ADDR_REG_OFF 0x30
|
|
#define MASTER_TX_COUNT_REG_OFF 0x34
|
|
#define TX_DESCRIPTOR_REG_OFF 0x38
|
|
#define TX_CHANNEL_CONFIG_COMMAND_OFF 0x40
|
|
#define TX_CHANNEL_CONFIG_DATA_OFF 0x44
|
|
#define TX_FREE_BUFFER_COUNT_OFF 0x48
|
|
#define RX_FREE_BUFFER_COUNT_OFF 0x4C
|
|
#define TX_CONFIG_OFF 0x50
|
|
#define TX_STATUS_OFF 0x54
|
|
#define RX_CONFIG_OFF 0x58
|
|
#define RX_LINE_CONFIG_OFF 0x5C
|
|
#define RX_QUEUE_RD_PTR_OFF 0x60
|
|
#define RX_QUEUE_WR_PTR_OFF 0x64
|
|
#define MAX_AAL5_CELL_COUNT_OFF 0x68
|
|
#define RX_CHANNEL_PORT_OFF 0x6C
|
|
#define TX_CELL_COUNT_OFF 0x70
|
|
#define RX_CELL_COUNT_OFF 0x74
|
|
#define HEC_ERROR_COUNT_OFF 0x78
|
|
#define UNASSIGNED_CELL_COUNT_OFF 0x7C
|
|
|
|
/* Register bit definitions */
|
|
|
|
/* Control 0 register */
|
|
|
|
#define SEEPROM_DO 0x00000001
|
|
#define SEEPROM_DI 0x00000002
|
|
#define SEEPROM_SK 0x00000004
|
|
#define SEEPROM_CS 0x00000008
|
|
#define DEBUG_BIT_0 0x00000010
|
|
#define DEBUG_BIT_1 0x00000020
|
|
#define DEBUG_BIT_2 0x00000040
|
|
// RESERVED 0x00000080
|
|
#define DEBUG_BIT_0_OE 0x00000100
|
|
#define DEBUG_BIT_1_OE 0x00000200
|
|
#define DEBUG_BIT_2_OE 0x00000400
|
|
// RESERVED 0x00000800
|
|
#define DEBUG_BIT_0_STATE 0x00001000
|
|
#define DEBUG_BIT_1_STATE 0x00002000
|
|
#define DEBUG_BIT_2_STATE 0x00004000
|
|
// RESERVED 0x00008000
|
|
#define GENERAL_BIT_0 0x00010000
|
|
#define GENERAL_BIT_1 0x00020000
|
|
#define GENERAL_BIT_2 0x00040000
|
|
#define GENERAL_BIT_3 0x00080000
|
|
#define RESET_HORIZON 0x00100000
|
|
#define RESET_ATM 0x00200000
|
|
#define RESET_RX 0x00400000
|
|
#define RESET_TX 0x00800000
|
|
#define RESET_HOST 0x01000000
|
|
// RESERVED 0x02000000
|
|
#define TARGET_RETRY_DISABLE 0x04000000
|
|
#define ATM_LAYER_SELECT 0x08000000
|
|
#define ATM_LAYER_STATUS 0x10000000
|
|
// RESERVED 0xE0000000
|
|
|
|
/* Interrupt source and enable registers */
|
|
|
|
#define RX_DATA_AV 0x00000001
|
|
#define RX_DISABLED 0x00000002
|
|
#define TIMING_MARKER 0x00000004
|
|
#define FORCED 0x00000008
|
|
#define RX_BUS_MASTER_COMPLETE 0x00000010
|
|
#define TX_BUS_MASTER_COMPLETE 0x00000020
|
|
#define ABR_TX_CELL_COUNT_INT 0x00000040
|
|
#define DEBUG_INT 0x00000080
|
|
// RESERVED 0xFFFFFF00
|
|
|
|
/* PIO and Bus Mastering */
|
|
|
|
#define MAX_PIO_COUNT 0x000000ff // 255 - make tunable?
|
|
// 8188 is a hard limit for bus mastering
|
|
#define MAX_TRANSFER_COUNT 0x00001ffc // 8188
|
|
#define MASTER_TX_AUTO_APPEND_DESC 0x80000000
|
|
|
|
/* TX channel config command port */
|
|
|
|
#define PCR_TIMER_ACCESS 0x0000
|
|
#define SCR_TIMER_ACCESS 0x0001
|
|
#define BUCKET_CAPACITY_ACCESS 0x0002
|
|
#define BUCKET_FULLNESS_ACCESS 0x0003
|
|
#define RATE_TYPE_ACCESS 0x0004
|
|
// UNUSED 0x00F8
|
|
#define TX_CHANNEL_CONFIG_MULT 0x0100
|
|
// UNUSED 0xF800
|
|
#define BUCKET_MAX_SIZE 0x003f
|
|
|
|
/* TX channel config data port */
|
|
|
|
#define CLOCK_SELECT_SHIFT 4
|
|
#define CLOCK_DISABLE 0x00ff
|
|
|
|
#define IDLE_RATE_TYPE 0x0
|
|
#define ABR_RATE_TYPE 0x1
|
|
#define VBR_RATE_TYPE 0x2
|
|
#define CBR_RATE_TYPE 0x3
|
|
|
|
/* TX config register */
|
|
|
|
#define DRVR_DRVRBAR_ENABLE 0x0001
|
|
#define TXCLK_MUX_SELECT_RCLK 0x0002
|
|
#define TRANSMIT_TIMING_MARKER 0x0004
|
|
#define LOOPBACK_TIMING_MARKER 0x0008
|
|
#define TX_TEST_MODE_16MHz 0x0000
|
|
#define TX_TEST_MODE_8MHz 0x0010
|
|
#define TX_TEST_MODE_5_33MHz 0x0020
|
|
#define TX_TEST_MODE_4MHz 0x0030
|
|
#define TX_TEST_MODE_3_2MHz 0x0040
|
|
#define TX_TEST_MODE_2_66MHz 0x0050
|
|
#define TX_TEST_MODE_2_29MHz 0x0060
|
|
#define TX_NORMAL_OPERATION 0x0070
|
|
#define ABR_ROUND_ROBIN 0x0080
|
|
|
|
/* TX status register */
|
|
|
|
#define IDLE_CHANNELS_MASK 0x00FF
|
|
#define ABR_CELL_COUNT_REACHED_MULT 0x0100
|
|
#define ABR_CELL_COUNT_REACHED_MASK 0xFF
|
|
|
|
/* RX config register */
|
|
|
|
#define NON_USER_CELLS_IN_ONE_CHANNEL 0x0008
|
|
#define RX_ENABLE 0x0010
|
|
#define IGNORE_UNUSED_VPI_VCI_BITS_SET 0x0000
|
|
#define NON_USER_UNUSED_VPI_VCI_BITS_SET 0x0020
|
|
#define DISCARD_UNUSED_VPI_VCI_BITS_SET 0x0040
|
|
|
|
/* RX line config register */
|
|
|
|
#define SIGNAL_LOSS 0x0001
|
|
#define FREQUENCY_DETECT_ERROR 0x0002
|
|
#define LOCK_DETECT_ERROR 0x0004
|
|
#define SELECT_INTERNAL_LOOPBACK 0x0008
|
|
#define LOCK_DETECT_ENABLE 0x0010
|
|
#define FREQUENCY_DETECT_ENABLE 0x0020
|
|
#define USER_FRAQ 0x0040
|
|
#define GXTALOUT_SELECT_DIV4 0x0080
|
|
#define GXTALOUT_SELECT_NO_GATING 0x0100
|
|
#define TIMING_MARKER_RECEIVED 0x0200
|
|
|
|
/* RX channel port */
|
|
|
|
#define RX_CHANNEL_MASK 0x03FF
|
|
// UNUSED 0x3C00
|
|
#define FLUSH_CHANNEL 0x4000
|
|
#define RX_CHANNEL_UPDATE_IN_PROGRESS 0x8000
|
|
|
|
/* Receive queue entry */
|
|
|
|
#define RX_Q_ENTRY_LENGTH_MASK 0x0000FFFF
|
|
#define RX_Q_ENTRY_CHANNEL_SHIFT 16
|
|
#define SIMONS_DODGEY_MARKER 0x08000000
|
|
#define RX_CONGESTION_EXPERIENCED 0x10000000
|
|
#define RX_CRC_10_OK 0x20000000
|
|
#define RX_CRC_32_OK 0x40000000
|
|
#define RX_COMPLETE_FRAME 0x80000000
|
|
|
|
/* Offsets and constants for use with the buffer memory */
|
|
|
|
/* Buffer pointers and channel types */
|
|
|
|
#define BUFFER_PTR_MASK 0x0000FFFF
|
|
#define RX_INT_THRESHOLD_MULT 0x00010000
|
|
#define RX_INT_THRESHOLD_MASK 0x07FF
|
|
#define INT_EVERY_N_CELLS 0x08000000
|
|
#define CONGESTION_EXPERIENCED 0x10000000
|
|
#define FIRST_CELL_OF_AAL5_FRAME 0x20000000
|
|
#define CHANNEL_TYPE_AAL5 0x00000000
|
|
#define CHANNEL_TYPE_RAW_CELLS 0x40000000
|
|
#define CHANNEL_TYPE_AAL3_4 0x80000000
|
|
|
|
/* Buffer status stuff */
|
|
|
|
#define BUFF_STATUS_MASK 0x00030000
|
|
#define BUFF_STATUS_EMPTY 0x00000000
|
|
#define BUFF_STATUS_CELL_AV 0x00010000
|
|
#define BUFF_STATUS_LAST_CELL_AV 0x00020000
|
|
|
|
/* Transmit channel stuff */
|
|
|
|
/* Receive channel stuff */
|
|
|
|
#define RX_CHANNEL_DISABLED 0x00000000
|
|
#define RX_CHANNEL_IDLE 0x00000001
|
|
|
|
/* General things */
|
|
|
|
#define INITIAL_CRC 0xFFFFFFFF
|
|
|
|
// A Horizon u32, a byte! Really nasty. Horizon pointers are (32 bit)
|
|
// word addresses and so standard C pointer operations break (as they
|
|
// assume byte addresses); so we pretend that Horizon words (and word
|
|
// pointers) are bytes (and byte pointers) for the purposes of having
|
|
// a memory map that works.
|
|
|
|
typedef u8 HDW;
|
|
|
|
typedef struct cell_buf {
|
|
HDW payload[12];
|
|
HDW next;
|
|
HDW cell_count; // AAL5 rx bufs
|
|
HDW res;
|
|
union {
|
|
HDW partial_crc; // AAL5 rx bufs
|
|
HDW cell_header; // RAW bufs
|
|
} u;
|
|
} cell_buf;
|
|
|
|
typedef struct tx_ch_desc {
|
|
HDW rd_buf_type;
|
|
HDW wr_buf_type;
|
|
HDW partial_crc;
|
|
HDW cell_header;
|
|
} tx_ch_desc;
|
|
|
|
typedef struct rx_ch_desc {
|
|
HDW wr_buf_type;
|
|
HDW rd_buf_type;
|
|
} rx_ch_desc;
|
|
|
|
typedef struct rx_q_entry {
|
|
HDW entry;
|
|
} rx_q_entry;
|
|
|
|
#define TX_CHANS 8
|
|
#define RX_CHANS 1024
|
|
#define RX_QS 1024
|
|
#define MAX_VCS RX_CHANS
|
|
|
|
/* Horizon buffer memory map */
|
|
|
|
// TX Channel Descriptors 2
|
|
// TX Initial Buffers 8 // TX_CHANS
|
|
#define BUFN1_SIZE 118 // (126 - TX_CHANS)
|
|
// RX/TX Start/End Buffers 4
|
|
#define BUFN2_SIZE 124
|
|
// RX Queue Entries 64
|
|
#define BUFN3_SIZE 192
|
|
// RX Channel Descriptors 128
|
|
#define BUFN4_SIZE 1408
|
|
// TOTAL cell_buff chunks 2048
|
|
|
|
// cell_buf bufs[2048];
|
|
// HDW dws[32768];
|
|
|
|
typedef struct MEMMAP {
|
|
tx_ch_desc tx_descs[TX_CHANS]; // 8 * 4 = 32 , 0x0020
|
|
cell_buf inittxbufs[TX_CHANS]; // these are really
|
|
cell_buf bufn1[BUFN1_SIZE]; // part of this pool
|
|
cell_buf txfreebufstart;
|
|
cell_buf txfreebufend;
|
|
cell_buf rxfreebufstart;
|
|
cell_buf rxfreebufend; // 8+118+1+1+1+1+124 = 254
|
|
cell_buf bufn2[BUFN2_SIZE]; // 16 * 254 = 4064 , 0x1000
|
|
rx_q_entry rx_q_entries[RX_QS]; // 1 * 1024 = 1024 , 0x1400
|
|
cell_buf bufn3[BUFN3_SIZE]; // 16 * 192 = 3072 , 0x2000
|
|
rx_ch_desc rx_descs[MAX_VCS]; // 2 * 1024 = 2048 , 0x2800
|
|
cell_buf bufn4[BUFN4_SIZE]; // 16 * 1408 = 22528 , 0x8000
|
|
} MEMMAP;
|
|
|
|
#define memmap ((MEMMAP *)0)
|
|
|
|
/* end horizon specific bits */
|
|
|
|
typedef enum {
|
|
aal0,
|
|
aal34,
|
|
aal5
|
|
} hrz_aal;
|
|
|
|
typedef enum {
|
|
tx_busy,
|
|
rx_busy,
|
|
ultra
|
|
} hrz_flags;
|
|
|
|
// a single struct pointed to by atm_vcc->dev_data
|
|
|
|
typedef struct {
|
|
unsigned int tx_rate;
|
|
unsigned int rx_rate;
|
|
u16 channel;
|
|
u16 tx_xbr_bits;
|
|
u16 tx_pcr_bits;
|
|
#if 0
|
|
u16 tx_scr_bits;
|
|
u16 tx_bucket_bits;
|
|
#endif
|
|
hrz_aal aal;
|
|
} hrz_vcc;
|
|
|
|
struct hrz_dev {
|
|
|
|
u32 iobase;
|
|
u32 * membase;
|
|
|
|
struct sk_buff * rx_skb; // skb being RXed
|
|
unsigned int rx_bytes; // bytes remaining to RX within region
|
|
void * rx_addr; // addr to send bytes to (for PIO)
|
|
unsigned int rx_channel; // channel that the skb is going out on
|
|
|
|
struct sk_buff * tx_skb; // skb being TXed
|
|
unsigned int tx_bytes; // bytes remaining to TX within region
|
|
void * tx_addr; // addr to send bytes from (for PIO)
|
|
struct iovec * tx_iovec; // remaining regions
|
|
unsigned int tx_regions; // number of remaining regions
|
|
|
|
spinlock_t mem_lock;
|
|
wait_queue_head_t tx_queue;
|
|
|
|
u8 irq;
|
|
unsigned long flags;
|
|
u8 tx_last;
|
|
u8 tx_idle;
|
|
|
|
rx_q_entry * rx_q_reset;
|
|
rx_q_entry * rx_q_entry;
|
|
rx_q_entry * rx_q_wrap;
|
|
|
|
struct atm_dev * atm_dev;
|
|
|
|
u32 last_vc;
|
|
|
|
int noof_spare_buffers;
|
|
u16 spare_buffers[SPARE_BUFFER_POOL_SIZE];
|
|
|
|
u16 tx_channel_record[TX_CHANS];
|
|
|
|
// this is what we follow when we get incoming data
|
|
u32 txer[MAX_VCS/32];
|
|
struct atm_vcc * rxer[MAX_VCS];
|
|
|
|
// cell rate allocation
|
|
spinlock_t rate_lock;
|
|
unsigned int rx_avail;
|
|
unsigned int tx_avail;
|
|
|
|
// dev stats
|
|
unsigned long tx_cell_count;
|
|
unsigned long rx_cell_count;
|
|
unsigned long hec_error_count;
|
|
unsigned long unassigned_cell_count;
|
|
|
|
struct pci_dev * pci_dev;
|
|
struct timer_list housekeeping;
|
|
};
|
|
|
|
typedef struct hrz_dev hrz_dev;
|
|
|
|
/* macros for use later */
|
|
|
|
#define BUF_PTR(cbptr) ((cbptr) - (cell_buf *) 0)
|
|
|
|
#define INTERESTING_INTERRUPTS \
|
|
(RX_DATA_AV | RX_DISABLED | TX_BUS_MASTER_COMPLETE | RX_BUS_MASTER_COMPLETE)
|
|
|
|
// 190 cells by default (192 TX buffers - 2 elbow room, see docs)
|
|
#define TX_AAL5_LIMIT (190*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER) // 9112
|
|
|
|
// Have enough RX buffers (unless we allow other buffer splits)
|
|
#define RX_AAL5_LIMIT ATM_MAX_AAL5_PDU
|
|
|
|
/* multi-statement macro protector */
|
|
#define DW(x) do{ x } while(0)
|
|
|
|
#define HRZ_DEV(atm_dev) ((hrz_dev *) (atm_dev)->dev_data)
|
|
#define HRZ_VCC(atm_vcc) ((hrz_vcc *) (atm_vcc)->dev_data)
|
|
|
|
/* Turn the LEDs on and off */
|
|
// The LEDs bits are upside down in that setting the bit in the debug
|
|
// register will turn the appropriate LED off.
|
|
|
|
#define YELLOW_LED DEBUG_BIT_0
|
|
#define GREEN_LED DEBUG_BIT_1
|
|
#define YELLOW_LED_OE DEBUG_BIT_0_OE
|
|
#define GREEN_LED_OE DEBUG_BIT_1_OE
|
|
|
|
#define GREEN_LED_OFF(dev) \
|
|
wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) | GREEN_LED)
|
|
#define GREEN_LED_ON(dev) \
|
|
wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) &~ GREEN_LED)
|
|
#define YELLOW_LED_OFF(dev) \
|
|
wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) | YELLOW_LED)
|
|
#define YELLOW_LED_ON(dev) \
|
|
wr_regl (dev, CONTROL_0_REG, rd_regl (dev, CONTROL_0_REG) &~ YELLOW_LED)
|
|
|
|
typedef enum {
|
|
round_up,
|
|
round_down,
|
|
round_nearest
|
|
} rounding;
|
|
|
|
#endif /* DRIVER_ATM_HORIZON_H */
|