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