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!

1 files changed, 508 insertions, 0 deletions

diff --git a/drivers/atm/horizon.h b/drivers/atm/horizon.h
new file mode 100644
index 0000000..e2cc702
--- /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 */