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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/atm/horizon.h
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/atm/horizon.h')
-rw-r--r--drivers/atm/horizon.h508
1 files changed, 508 insertions, 0 deletions
diff --git a/drivers/atm/horizon.h b/drivers/atm/horizon.h
new file mode 100644
index 000000000000..e2cc7020fa3b
--- /dev/null
+++ b/drivers/atm/horizon.h
@@ -0,0 +1,508 @@
+/*
+ Madge Horizon ATM Adapter driver.
+ Copyright (C) 1995-1999 Madge Networks Ltd.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
+ system and in the file COPYING in the Linux kernel source.
+*/
+
+/*
+ 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
+
+#include <linux/config.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;
+ 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 */