drivers/scsi/dc395x.c

0001 /*
0002  * dc395x.c
0003  *
0004  * Device Driver for Tekram DC395(U/UW/F), DC315(U)
0005  * PCI SCSI Bus Master Host Adapter
0006  * (SCSI chip set used Tekram ASIC TRM-S1040)
0007  *
0008  * Authors:
0009  *  C.L. Huang <ching@tekram.com.tw>
0010  *  Erich Chen <erich@tekram.com.tw>
0011  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
0012  *
0013  *  Kurt Garloff <garloff@suse.de>
0014  *  (C) 1999-2000 Kurt Garloff
0015  *
0016  *  Oliver Neukum <oliver@neukum.name>
0017  *  Ali Akcaagac <aliakc@web.de>
0018  *  Jamie Lenehan <lenehan@twibble.org>
0019  *  (C) 2003
0020  *
0021  * License: GNU GPL
0022  *
0023  *************************************************************************
0024  *
0025  * Redistribution and use in source and binary forms, with or without
0026  * modification, are permitted provided that the following conditions
0027  * are met:
0028  * 1. Redistributions of source code must retain the above copyright
0029  *    notice, this list of conditions and the following disclaimer.
0030  * 2. Redistributions in binary form must reproduce the above copyright
0031  *    notice, this list of conditions and the following disclaimer in the
0032  *    documentation and/or other materials provided with the distribution.
0033  * 3. The name of the author may not be used to endorse or promote products
0034  *    derived from this software without specific prior written permission.
0035  *
0036  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
0037  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
0038  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
0039  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
0040  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
0041  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
0042  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
0043  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0044  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
0045  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0046  *
0047  ************************************************************************
0048  */
0049 #include <linux/module.h>
0050 #include <linux/moduleparam.h>
0051 #include <linux/delay.h>
0052 #include <linux/ctype.h>
0053 #include <linux/blkdev.h>
0054 #include <linux/interrupt.h>
0055 #include <linux/init.h>
0056 #include <linux/spinlock.h>
0057 #include <linux/pci.h>
0058 #include <linux/list.h>
0059 #include <linux/vmalloc.h>
0060 #include <linux/slab.h>
0061 #include <asm/io.h>
0062
0063 #include <scsi/scsi.h>
0064 #include <scsi/scsi_cmnd.h>
0065 #include <scsi/scsi_device.h>
0066 #include <scsi/scsi_host.h>
0067 #include <scsi/scsi_transport_spi.h>
0068
0069 #include "dc395x.h"
0070
0071 #define DC395X_NAME "dc395x"
0072 #define DC395X_BANNER   "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
0073 #define DC395X_VERSION  "v2.05, 2004/03/08"
0074
0075 /*---------------------------------------------------------------------------
0076                                   Features
0077  ---------------------------------------------------------------------------*/
0078 /*
0079  * Set to disable parts of the driver
0080  */
0081 /*#define DC395x_NO_DISCONNECT*/
0082 /*#define DC395x_NO_TAGQ*/
0083 /*#define DC395x_NO_SYNC*/
0084 /*#define DC395x_NO_WIDE*/
0085
0086 /*---------------------------------------------------------------------------
0087                                   Debugging
0088  ---------------------------------------------------------------------------*/
0089 /*
0090  * Types of debugging that can be enabled and disabled
0091  */
0092 #define DBG_KG      0x0001
0093 #define DBG_0       0x0002
0094 #define DBG_1       0x0004
0095 #define DBG_SG      0x0020
0096 #define DBG_FIFO    0x0040
0097 #define DBG_PIO     0x0080
0098
0099
0100 /*
0101  * Set set of things to output debugging for.
0102  * Undefine to remove all debugging
0103  */
0104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
0105 /*#define  DEBUG_MASK   DBG_0*/
0106
0107
0108 /*
0109  * Output a kernel mesage at the specified level and append the
0110  * driver name and a ": " to the start of the message
0111  */
0112 #define dprintkl(level, format, arg...)  \
0113     printk(level DC395X_NAME ": " format , ## arg)
0114
0115
0116 #ifdef DEBUG_MASK
0117 /*
0118  * print a debug message - this is formated with KERN_DEBUG, then the
0119  * driver name followed by a ": " and then the message is output.
0120  * This also checks that the specified debug level is enabled before
0121  * outputing the message
0122  */
0123 #define dprintkdbg(type, format, arg...) \
0124     do { \
0125         if ((type) & (DEBUG_MASK)) \
0126             dprintkl(KERN_DEBUG , format , ## arg); \
0127     } while (0)
0128
0129 /*
0130  * Check if the specified type of debugging is enabled
0131  */
0132 #define debug_enabled(type) ((DEBUG_MASK) & (type))
0133
0134 #else
0135 /*
0136  * No debugging. Do nothing
0137  */
0138 #define dprintkdbg(type, format, arg...) \
0139     do {} while (0)
0140 #define debug_enabled(type) (0)
0141
0142 #endif
0143
0144
0145 #ifndef PCI_VENDOR_ID_TEKRAM
0146 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1  /* Vendor ID    */
0147 #endif
0148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
0149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391  /* Device ID    */
0150 #endif
0151
0152
0153 #define DC395x_LOCK_IO(dev,flags)       spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
0154 #define DC395x_UNLOCK_IO(dev,flags)     spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
0155
0156 #define DC395x_read8(acb,address)       (u8)(inb(acb->io_port_base + (address)))
0157 #define DC395x_read16(acb,address)      (u16)(inw(acb->io_port_base + (address)))
0158 #define DC395x_read32(acb,address)      (u32)(inl(acb->io_port_base + (address)))
0159 #define DC395x_write8(acb,address,value)    outb((value), acb->io_port_base + (address))
0160 #define DC395x_write16(acb,address,value)   outw((value), acb->io_port_base + (address))
0161 #define DC395x_write32(acb,address,value)   outl((value), acb->io_port_base + (address))
0162
0163 #define TAG_NONE 255
0164
0165 /*
0166  * srb->segement_x is the hw sg list. It is always allocated as a
0167  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
0168  * cross a page boundy.
0169  */
0170 #define SEGMENTX_LEN    (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
0171
0172
0173 struct SGentry {
0174     u32 address;        /* bus! address */
0175     u32 length;
0176 };
0177
0178 /* The SEEPROM structure for TRM_S1040 */
0179 struct NVRamTarget {
0180     u8 cfg0;        /* Target configuration byte 0  */
0181     u8 period;      /* Target period                */
0182     u8 cfg2;        /* Target configuration byte 2  */
0183     u8 cfg3;        /* Target configuration byte 3  */
0184 };
0185
0186 struct NvRamType {
0187     u8 sub_vendor_id[2];    /* 0,1  Sub Vendor ID   */
0188     u8 sub_sys_id[2];   /* 2,3  Sub System ID   */
0189     u8 sub_class;       /* 4    Sub Class       */
0190     u8 vendor_id[2];    /* 5,6  Vendor ID       */
0191     u8 device_id[2];    /* 7,8  Device ID       */
0192     u8 reserved;        /* 9    Reserved        */
0193     struct NVRamTarget target[DC395x_MAX_SCSI_ID];
0194                         /** 10,11,12,13
0195                          ** 14,15,16,17
0196                          ** ....
0197                          ** ....
0198                          ** 70,71,72,73
0199                          */
0200     u8 scsi_id;     /* 74 Host Adapter SCSI ID      */
0201     u8 channel_cfg;     /* 75 Channel configuration     */
0202     u8 delay_time;      /* 76 Power on delay time       */
0203     u8 max_tag;     /* 77 Maximum tags              */
0204     u8 reserved0;       /* 78  */
0205     u8 boot_target;     /* 79  */
0206     u8 boot_lun;        /* 80  */
0207     u8 reserved1;       /* 81  */
0208     u16 reserved2[22];  /* 82,..125 */
0209     u16 cksum;      /* 126,127 */
0210 };
0211
0212 struct ScsiReqBlk {
0213     struct list_head list;      /* next/prev ptrs for srb lists */
0214     struct DeviceCtlBlk *dcb;
0215     struct scsi_cmnd *cmd;
0216
0217     struct SGentry *segment_x;  /* Linear array of hw sg entries (up to 64 entries) */
0218     dma_addr_t sg_bus_addr;         /* Bus address of sg list (ie, of segment_x) */
0219
0220     u8 sg_count;            /* No of HW sg entries for this request */
0221     u8 sg_index;            /* Index of HW sg entry for this request */
0222     size_t total_xfer_length;   /* Total number of bytes remaining to be transferred */
0223     size_t request_length;      /* Total number of bytes in this request */
0224     /*
0225      * The sense buffer handling function, request_sense, uses
0226      * the first hw sg entry (segment_x[0]) and the transfer
0227      * length (total_xfer_length). While doing this it stores the
0228      * original values into the last sg hw list
0229      * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
0230      * total_xfer_length in xferred. These values are restored in
0231      * pci_unmap_srb_sense. This is the only place xferred is used.
0232      */
0233     size_t xferred;             /* Saved copy of total_xfer_length */
0234
0235     u16 state;
0236
0237     u8 msgin_buf[6];
0238     u8 msgout_buf[6];
0239
0240     u8 adapter_status;
0241     u8 target_status;
0242     u8 msg_count;
0243     u8 end_message;
0244
0245     u8 tag_number;
0246     u8 status;
0247     u8 retry_count;
0248     u8 flag;
0249
0250     u8 scsi_phase;
0251 };
0252
0253 struct DeviceCtlBlk {
0254     struct list_head list;      /* next/prev ptrs for the dcb list */
0255     struct AdapterCtlBlk *acb;
0256     struct list_head srb_going_list;    /* head of going srb list */
0257     struct list_head srb_waiting_list;  /* head of waiting srb list */
0258
0259     struct ScsiReqBlk *active_srb;
0260     u32 tag_mask;
0261
0262     u16 max_command;
0263
0264     u8 target_id;       /* SCSI Target ID  (SCSI Only) */
0265     u8 target_lun;      /* SCSI Log.  Unit (SCSI Only) */
0266     u8 identify_msg;
0267     u8 dev_mode;
0268
0269     u8 inquiry7;        /* To store Inquiry flags */
0270     u8 sync_mode;       /* 0:async mode */
0271     u8 min_nego_period; /* for nego. */
0272     u8 sync_period;     /* for reg.  */
0273
0274     u8 sync_offset;     /* for reg. and nego.(low nibble) */
0275     u8 flag;
0276     u8 dev_type;
0277     u8 init_tcq_flag;
0278 };
0279
0280 struct AdapterCtlBlk {
0281     struct Scsi_Host *scsi_host;
0282
0283     unsigned long io_port_base;
0284     unsigned long io_port_len;
0285
0286     struct list_head dcb_list;      /* head of going dcb list */
0287     struct DeviceCtlBlk *dcb_run_robin;
0288     struct DeviceCtlBlk *active_dcb;
0289
0290     struct list_head srb_free_list;     /* head of free srb list */
0291     struct ScsiReqBlk *tmp_srb;
0292     struct timer_list waiting_timer;
0293     struct timer_list selto_timer;
0294
0295     unsigned long last_reset;
0296
0297     u16 srb_count;
0298
0299     u8 sel_timeout;
0300
0301     unsigned int irq_level;
0302     u8 tag_max_num;
0303     u8 acb_flag;
0304     u8 gmode2;
0305
0306     u8 config;
0307     u8 lun_chk;
0308     u8 scan_devices;
0309     u8 hostid_bit;
0310
0311     u8 dcb_map[DC395x_MAX_SCSI_ID];
0312     struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
0313
0314     struct pci_dev *dev;
0315
0316     u8 msg_len;
0317
0318     struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
0319     struct ScsiReqBlk srb;
0320
0321     struct NvRamType eeprom;    /* eeprom settings for this adapter */
0322 };
0323
0324
0325 /*---------------------------------------------------------------------------
0326                             Forward declarations
0327  ---------------------------------------------------------------------------*/
0328 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0329         u16 *pscsi_status);
0330 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0331         u16 *pscsi_status);
0332 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0333         u16 *pscsi_status);
0334 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0335         u16 *pscsi_status);
0336 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0337         u16 *pscsi_status);
0338 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0339         u16 *pscsi_status);
0340 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0341         u16 *pscsi_status);
0342 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0343         u16 *pscsi_status);
0344 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0345         u16 *pscsi_status);
0346 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0347         u16 *pscsi_status);
0348 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0349         u16 *pscsi_status);
0350 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0351         u16 *pscsi_status);
0352 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0353         u16 *pscsi_status);
0354 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
0355         u16 *pscsi_status);
0356 static void set_basic_config(struct AdapterCtlBlk *acb);
0357 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
0358         struct ScsiReqBlk *srb);
0359 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
0360 static void data_io_transfer(struct AdapterCtlBlk *acb,
0361         struct ScsiReqBlk *srb, u16 io_dir);
0362 static void disconnect(struct AdapterCtlBlk *acb);
0363 static void reselect(struct AdapterCtlBlk *acb);
0364 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
0365         struct ScsiReqBlk *srb);
0366 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
0367         struct ScsiReqBlk *srb);
0368 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
0369         struct ScsiReqBlk *srb);
0370 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
0371         struct scsi_cmnd *cmd, u8 force);
0372 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
0373 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
0374 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
0375         struct ScsiReqBlk *srb);
0376 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
0377         struct ScsiReqBlk *srb);
0378 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
0379         struct ScsiReqBlk *srb);
0380 static void set_xfer_rate(struct AdapterCtlBlk *acb,
0381         struct DeviceCtlBlk *dcb);
0382 static void waiting_timeout(struct timer_list *t);
0383
0384
0385 /*---------------------------------------------------------------------------
0386                                  Static Data
0387  ---------------------------------------------------------------------------*/
0388 static u16 current_sync_offset = 0;
0389
0390 static void *dc395x_scsi_phase0[] = {
0391     data_out_phase0,/* phase:0 */
0392     data_in_phase0, /* phase:1 */
0393     command_phase0, /* phase:2 */
0394     status_phase0,  /* phase:3 */
0395     nop0,       /* phase:4 PH_BUS_FREE .. initial phase */
0396     nop0,       /* phase:5 PH_BUS_FREE .. initial phase */
0397     msgout_phase0,  /* phase:6 */
0398     msgin_phase0,   /* phase:7 */
0399 };
0400
0401 static void *dc395x_scsi_phase1[] = {
0402     data_out_phase1,/* phase:0 */
0403     data_in_phase1, /* phase:1 */
0404     command_phase1, /* phase:2 */
0405     status_phase1,  /* phase:3 */
0406     nop1,       /* phase:4 PH_BUS_FREE .. initial phase */
0407     nop1,       /* phase:5 PH_BUS_FREE .. initial phase */
0408     msgout_phase1,  /* phase:6 */
0409     msgin_phase1,   /* phase:7 */
0410 };
0411
0412 /*
0413  *Fast20:   000  50ns, 20.0 MHz
0414  *      001  75ns, 13.3 MHz
0415  *      010 100ns, 10.0 MHz
0416  *      011 125ns,  8.0 MHz
0417  *      100 150ns,  6.6 MHz
0418  *      101 175ns,  5.7 MHz
0419  *      110 200ns,  5.0 MHz
0420  *      111 250ns,  4.0 MHz
0421  *
0422  *Fast40(LVDS): 000  25ns, 40.0 MHz
0423  *      001  50ns, 20.0 MHz
0424  *      010  75ns, 13.3 MHz
0425  *      011 100ns, 10.0 MHz
0426  *      100 125ns,  8.0 MHz
0427  *      101 150ns,  6.6 MHz
0428  *      110 175ns,  5.7 MHz
0429  *      111 200ns,  5.0 MHz
0430  */
0431 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
0432
0433 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
0434 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
0435 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
0436
0437
0438 /*---------------------------------------------------------------------------
0439                                 Configuration
0440   ---------------------------------------------------------------------------*/
0441 /*
0442  * Module/boot parameters currently effect *all* instances of the
0443  * card in the system.
0444  */
0445
0446 /*
0447  * Command line parameters are stored in a structure below.
0448  * These are the index's into the structure for the various
0449  * command line options.
0450  */
0451 #define CFG_ADAPTER_ID      0
0452 #define CFG_MAX_SPEED       1
0453 #define CFG_DEV_MODE        2
0454 #define CFG_ADAPTER_MODE    3
0455 #define CFG_TAGS        4
0456 #define CFG_RESET_DELAY     5
0457
0458 #define CFG_NUM         6   /* number of configuration items */
0459
0460
0461 /*
0462  * Value used to indicate that a command line override
0463  * hasn't been used to modify the value.
0464  */
0465 #define CFG_PARAM_UNSET -1
0466
0467
0468 /*
0469  * Hold command line parameters.
0470  */
0471 struct ParameterData {
0472     int value;      /* value of this setting */
0473     int min;        /* minimum value */
0474     int max;        /* maximum value */
0475     int def;        /* default value */
0476     int safe;       /* safe value */
0477 };
0478 static struct ParameterData cfg_data[] = {
0479     { /* adapter id */
0480         CFG_PARAM_UNSET,
0481         0,
0482         15,
0483         7,
0484         7
0485     },
0486     { /* max speed */
0487         CFG_PARAM_UNSET,
0488           0,
0489           7,
0490           1,    /* 13.3Mhz */
0491           4,    /*  6.7Hmz */
0492     },
0493     { /* dev mode */
0494         CFG_PARAM_UNSET,
0495         0,
0496         0x3f,
0497         NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
0498             NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
0499             NTC_DO_SEND_START,
0500         NTC_DO_PARITY_CHK | NTC_DO_SEND_START
0501     },
0502     { /* adapter mode */
0503         CFG_PARAM_UNSET,
0504         0,
0505         0x2f,
0506         NAC_SCANLUN |
0507         NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
0508             /*| NAC_ACTIVE_NEG*/,
0509         NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
0510     },
0511     { /* tags */
0512         CFG_PARAM_UNSET,
0513         0,
0514         5,
0515         3,  /* 16 tags (??) */
0516         2,
0517     },
0518     { /* reset delay */
0519         CFG_PARAM_UNSET,
0520         0,
0521         180,
0522         1,  /* 1 second */
0523         10, /* 10 seconds */
0524     }
0525 };
0526
0527
0528 /*
0529  * Safe settings. If set to zero the BIOS/default values with
0530  * command line overrides will be used. If set to 1 then safe and
0531  * slow settings will be used.
0532  */
0533 static bool use_safe_settings = 0;
0534 module_param_named(safe, use_safe_settings, bool, 0);
0535 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
0536
0537
0538 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
0539 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
0540
0541 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
0542 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
0543
0544 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
0545 MODULE_PARM_DESC(dev_mode, "Device mode.");
0546
0547 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
0548 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
0549
0550 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
0551 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
0552
0553 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
0554 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
0555
0556
0557 /**
0558  * set_safe_settings - if the use_safe_settings option is set then
0559  * set all values to the safe and slow values.
0560  **/
0561 static void set_safe_settings(void)
0562 {
0563     if (use_safe_settings)
0564     {
0565         int i;
0566
0567         dprintkl(KERN_INFO, "Using safe settings.\n");
0568         for (i = 0; i < CFG_NUM; i++)
0569         {
0570             cfg_data[i].value = cfg_data[i].safe;
0571         }
0572     }
0573 }
0574
0575
0576 /**
0577  * fix_settings - reset any boot parameters which are out of range
0578  * back to the default values.
0579  **/
0580 static void fix_settings(void)
0581 {
0582     int i;
0583
0584     dprintkdbg(DBG_1,
0585         "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
0586         "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
0587         cfg_data[CFG_ADAPTER_ID].value,
0588         cfg_data[CFG_MAX_SPEED].value,
0589         cfg_data[CFG_DEV_MODE].value,
0590         cfg_data[CFG_ADAPTER_MODE].value,
0591         cfg_data[CFG_TAGS].value,
0592         cfg_data[CFG_RESET_DELAY].value);
0593     for (i = 0; i < CFG_NUM; i++)
0594     {
0595         if (cfg_data[i].value < cfg_data[i].min
0596             || cfg_data[i].value > cfg_data[i].max)
0597             cfg_data[i].value = cfg_data[i].def;
0598     }
0599 }
0600
0601
0602
0603 /*
0604  * Mapping from the eeprom delay index value (index into this array)
0605  * to the number of actual seconds that the delay should be for.
0606  */
0607 static char eeprom_index_to_delay_map[] =
0608     { 1, 3, 5, 10, 16, 30, 60, 120 };
0609
0610
0611 /**
0612  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
0613  * into a number of seconds.
0614  *
0615  * @eeprom: The eeprom structure in which we find the delay index to map.
0616  **/
0617 static void eeprom_index_to_delay(struct NvRamType *eeprom)
0618 {
0619     eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
0620 }
0621
0622
0623 /**
0624  * delay_to_eeprom_index - Take a delay in seconds and return the
0625  * closest eeprom index which will delay for at least that amount of
0626  * seconds.
0627  *
0628  * @delay: The delay, in seconds, to find the eeprom index for.
0629  **/
0630 static int delay_to_eeprom_index(int delay)
0631 {
0632     u8 idx = 0;
0633     while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
0634         idx++;
0635     return idx;
0636 }
0637
0638
0639 /**
0640  * eeprom_override - Override the eeprom settings, in the provided
0641  * eeprom structure, with values that have been set on the command
0642  * line.
0643  *
0644  * @eeprom: The eeprom data to override with command line options.
0645  **/
0646 static void eeprom_override(struct NvRamType *eeprom)
0647 {
0648     u8 id;
0649
0650     /* Adapter Settings */
0651     if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
0652         eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
0653
0654     if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
0655         eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
0656
0657     if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
0658         eeprom->delay_time = delay_to_eeprom_index(
0659                     cfg_data[CFG_RESET_DELAY].value);
0660
0661     if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
0662         eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
0663
0664     /* Device Settings */
0665     for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
0666         if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
0667             eeprom->target[id].cfg0 =
0668                 (u8)cfg_data[CFG_DEV_MODE].value;
0669
0670         if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
0671             eeprom->target[id].period =
0672                 (u8)cfg_data[CFG_MAX_SPEED].value;
0673
0674     }
0675 }
0676
0677
0678 /*---------------------------------------------------------------------------
0679  ---------------------------------------------------------------------------*/
0680
0681 static unsigned int list_size(struct list_head *head)
0682 {
0683     unsigned int count = 0;
0684     struct list_head *pos;
0685     list_for_each(pos, head)
0686         count++;
0687     return count;
0688 }
0689
0690
0691 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
0692         struct DeviceCtlBlk *pos)
0693 {
0694     int use_next = 0;
0695     struct DeviceCtlBlk* next = NULL;
0696     struct DeviceCtlBlk* i;
0697
0698     if (list_empty(head))
0699         return NULL;
0700
0701     /* find supplied dcb and then select the next one */
0702     list_for_each_entry(i, head, list)
0703         if (use_next) {
0704             next = i;
0705             break;
0706         } else if (i == pos) {
0707             use_next = 1;
0708         }
0709     /* if no next one take the head one (ie, wraparound) */
0710     if (!next)
0711             list_for_each_entry(i, head, list) {
0712                 next = i;
0713                 break;
0714             }
0715
0716     return next;
0717 }
0718
0719
0720 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
0721 {
0722     if (srb->tag_number < 255) {
0723         dcb->tag_mask &= ~(1 << srb->tag_number);   /* free tag mask */
0724         srb->tag_number = 255;
0725     }
0726 }
0727
0728
0729 /* Find cmd in SRB list */
0730 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
0731         struct list_head *head)
0732 {
0733     struct ScsiReqBlk *i;
0734     list_for_each_entry(i, head, list)
0735         if (i->cmd == cmd)
0736             return i;
0737     return NULL;
0738 }
0739
0740 /* Sets the timer to wake us up */
0741 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
0742 {
0743     if (timer_pending(&acb->waiting_timer))
0744         return;
0745     if (time_before(jiffies + to, acb->last_reset - HZ / 2))
0746         acb->waiting_timer.expires =
0747             acb->last_reset - HZ / 2 + 1;
0748     else
0749         acb->waiting_timer.expires = jiffies + to + 1;
0750     add_timer(&acb->waiting_timer);
0751 }
0752
0753
0754 /* Send the next command from the waiting list to the bus */
0755 static void waiting_process_next(struct AdapterCtlBlk *acb)
0756 {
0757     struct DeviceCtlBlk *start = NULL;
0758     struct DeviceCtlBlk *pos;
0759     struct DeviceCtlBlk *dcb;
0760     struct ScsiReqBlk *srb;
0761     struct list_head *dcb_list_head = &acb->dcb_list;
0762
0763     if (acb->active_dcb
0764         || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
0765         return;
0766
0767     if (timer_pending(&acb->waiting_timer))
0768         del_timer(&acb->waiting_timer);
0769
0770     if (list_empty(dcb_list_head))
0771         return;
0772
0773     /*
0774      * Find the starting dcb. Need to find it again in the list
0775      * since the list may have changed since we set the ptr to it
0776      */
0777     list_for_each_entry(dcb, dcb_list_head, list)
0778         if (dcb == acb->dcb_run_robin) {
0779             start = dcb;
0780             break;
0781         }
0782     if (!start) {
0783         /* This can happen! */
0784         start = list_entry(dcb_list_head->next, typeof(*start), list);
0785         acb->dcb_run_robin = start;
0786     }
0787
0788
0789     /*
0790      * Loop over the dcb, but we start somewhere (potentially) in
0791      * the middle of the loop so we need to manully do this.
0792      */
0793     pos = start;
0794     do {
0795         struct list_head *waiting_list_head = &pos->srb_waiting_list;
0796
0797         /* Make sure, the next another device gets scheduled ... */
0798         acb->dcb_run_robin = dcb_get_next(dcb_list_head,
0799                           acb->dcb_run_robin);
0800
0801         if (list_empty(waiting_list_head) ||
0802             pos->max_command <= list_size(&pos->srb_going_list)) {
0803             /* move to next dcb */
0804             pos = dcb_get_next(dcb_list_head, pos);
0805         } else {
0806             srb = list_entry(waiting_list_head->next,
0807                      struct ScsiReqBlk, list);
0808
0809             /* Try to send to the bus */
0810             if (!start_scsi(acb, pos, srb))
0811                 list_move(&srb->list, &pos->srb_going_list);
0812             else
0813                 waiting_set_timer(acb, HZ/50);
0814             break;
0815         }
0816     } while (pos != start);
0817 }
0818
0819
0820 /* Wake up waiting queue */
0821 static void waiting_timeout(struct timer_list *t)
0822 {
0823     unsigned long flags;
0824     struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
0825     dprintkdbg(DBG_1,
0826         "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
0827     DC395x_LOCK_IO(acb->scsi_host, flags);
0828     waiting_process_next(acb);
0829     DC395x_UNLOCK_IO(acb->scsi_host, flags);
0830 }
0831
0832
0833 /* Get the DCB for a given ID/LUN combination */
0834 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
0835 {
0836     return acb->children[id][lun];
0837 }
0838
0839
0840 /* Send SCSI Request Block (srb) to adapter (acb) */
0841 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
0842 {
0843     struct DeviceCtlBlk *dcb = srb->dcb;
0844
0845     if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
0846         acb->active_dcb ||
0847         (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
0848         list_add_tail(&srb->list, &dcb->srb_waiting_list);
0849         waiting_process_next(acb);
0850         return;
0851     }
0852
0853     if (!start_scsi(acb, dcb, srb)) {
0854         list_add_tail(&srb->list, &dcb->srb_going_list);
0855     } else {
0856         list_add(&srb->list, &dcb->srb_waiting_list);
0857         waiting_set_timer(acb, HZ / 50);
0858     }
0859 }
0860
0861 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
0862 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
0863         struct ScsiReqBlk *srb)
0864 {
0865     int nseg;
0866     enum dma_data_direction dir = cmd->sc_data_direction;
0867     dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
0868         cmd, dcb->target_id, dcb->target_lun);
0869
0870     srb->dcb = dcb;
0871     srb->cmd = cmd;
0872     srb->sg_count = 0;
0873     srb->total_xfer_length = 0;
0874     srb->sg_bus_addr = 0;
0875     srb->sg_index = 0;
0876     srb->adapter_status = 0;
0877     srb->target_status = 0;
0878     srb->msg_count = 0;
0879     srb->status = 0;
0880     srb->flag = 0;
0881     srb->state = 0;
0882     srb->retry_count = 0;
0883     srb->tag_number = TAG_NONE;
0884     srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
0885     srb->end_message = 0;
0886
0887     nseg = scsi_dma_map(cmd);
0888     BUG_ON(nseg < 0);
0889
0890     if (dir == DMA_NONE || !nseg) {
0891         dprintkdbg(DBG_0,
0892             "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
0893                cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
0894                srb->segment_x[0].address);
0895     } else {
0896         int i;
0897         u32 reqlen = scsi_bufflen(cmd);
0898         struct scatterlist *sg;
0899         struct SGentry *sgp = srb->segment_x;
0900
0901         srb->sg_count = nseg;
0902
0903         dprintkdbg(DBG_0,
0904                "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
0905                reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
0906                srb->sg_count);
0907
0908         scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
0909             u32 busaddr = (u32)sg_dma_address(sg);
0910             u32 seglen = (u32)sg->length;
0911             sgp[i].address = busaddr;
0912             sgp[i].length = seglen;
0913             srb->total_xfer_length += seglen;
0914         }
0915         sgp += srb->sg_count - 1;
0916
0917         /*
0918          * adjust last page if too big as it is allocated
0919          * on even page boundaries
0920          */
0921         if (srb->total_xfer_length > reqlen) {
0922             sgp->length -= (srb->total_xfer_length - reqlen);
0923             srb->total_xfer_length = reqlen;
0924         }
0925
0926         /* Fixup for WIDE padding - make sure length is even */
0927         if (dcb->sync_period & WIDE_SYNC &&
0928             srb->total_xfer_length % 2) {
0929             srb->total_xfer_length++;
0930             sgp->length++;
0931         }
0932
0933         srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
0934                 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
0935
0936         dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
0937             srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
0938     }
0939
0940     srb->request_length = srb->total_xfer_length;
0941 }
0942
0943
0944 /**
0945  * dc395x_queue_command_lck - queue scsi command passed from the mid
0946  * layer, invoke 'done' on completion
0947  *
0948  * @cmd: pointer to scsi command object
0949  *
0950  * Returns 1 if the adapter (host) is busy, else returns 0. One
0951  * reason for an adapter to be busy is that the number
0952  * of outstanding queued commands is already equal to
0953  * struct Scsi_Host::can_queue .
0954  *
0955  * Required: if struct Scsi_Host::can_queue is ever non-zero
0956  *           then this function is required.
0957  *
0958  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
0959  *        and is expected to be held on return.
0960  *
0961  */
0962 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd)
0963 {
0964     void (*done)(struct scsi_cmnd *) = scsi_done;
0965     struct DeviceCtlBlk *dcb;
0966     struct ScsiReqBlk *srb;
0967     struct AdapterCtlBlk *acb =
0968         (struct AdapterCtlBlk *)cmd->device->host->hostdata;
0969     dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
0970         cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
0971
0972     /* Assume BAD_TARGET; will be cleared later */
0973     set_host_byte(cmd, DID_BAD_TARGET);
0974
0975     /* ignore invalid targets */
0976     if (cmd->device->id >= acb->scsi_host->max_id ||
0977         cmd->device->lun >= acb->scsi_host->max_lun ||
0978         cmd->device->lun >31) {
0979         goto complete;
0980     }
0981
0982     /* does the specified lun on the specified device exist */
0983     if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
0984         dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
0985             cmd->device->id, (u8)cmd->device->lun);
0986         goto complete;
0987     }
0988
0989     /* do we have a DCB for the device */
0990     dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
0991     if (!dcb) {
0992         /* should never happen */
0993         dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
0994             cmd->device->id, (u8)cmd->device->lun);
0995         goto complete;
0996     }
0997
0998     set_host_byte(cmd, DID_OK);
0999     set_status_byte(cmd, SAM_STAT_GOOD);
1000
1001     srb = list_first_entry_or_null(&acb->srb_free_list,
1002             struct ScsiReqBlk, list);
1003     if (!srb) {
1004         /*
1005          * Return 1 since we are unable to queue this command at this
1006          * point in time.
1007          */
1008         dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1009         return 1;
1010     }
1011     list_del(&srb->list);
1012
1013     build_srb(cmd, dcb, srb);
1014
1015     if (!list_empty(&dcb->srb_waiting_list)) {
1016         /* append to waiting queue */
1017         list_add_tail(&srb->list, &dcb->srb_waiting_list);
1018         waiting_process_next(acb);
1019     } else {
1020         /* process immediately */
1021         send_srb(acb, srb);
1022     }
1023     dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1024     return 0;
1025
1026 complete:
1027     /*
1028      * Complete the command immediatey, and then return 0 to
1029      * indicate that we have handled the command. This is usually
1030      * done when the commad is for things like non existent
1031      * devices.
1032      */
1033     done(cmd);
1034     return 0;
1035 }
1036
1037 static DEF_SCSI_QCMD(dc395x_queue_command)
1038
1039 static void dump_register_info(struct AdapterCtlBlk *acb,
1040         struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1041 {
1042     u16 pstat;
1043     struct pci_dev *dev = acb->dev;
1044     pci_read_config_word(dev, PCI_STATUS, &pstat);
1045     if (!dcb)
1046         dcb = acb->active_dcb;
1047     if (!srb && dcb)
1048         srb = dcb->active_srb;
1049     if (srb) {
1050         if (!srb->cmd)
1051             dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1052                 srb, srb->cmd);
1053         else
1054             dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1055                  "cmnd=0x%02x <%02i-%i>\n",
1056                 srb, srb->cmd,
1057                 srb->cmd->cmnd[0], srb->cmd->device->id,
1058                 (u8)srb->cmd->device->lun);
1059         printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1060                srb->segment_x, srb->sg_count, srb->sg_index,
1061                srb->total_xfer_length);
1062         printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1063                srb->state, srb->status, srb->scsi_phase,
1064                (acb->active_dcb) ? "" : "not");
1065     }
1066     dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1067         "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1068         "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1069         "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1070         DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1071         DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1072         DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1073         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1074         DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1075         DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1076         DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1077         DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1078         DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1079         DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1080         DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1081         DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1082         DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1083     dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1084         "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1085         "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1086         DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1087         DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1088         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1089         DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1090         DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1091         DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1092         DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1093         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1094         DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1095         DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1096     dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1097         "pci{status=0x%04x}\n",
1098         DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1099         DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1100         DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1101         pstat);
1102 }
1103
1104
1105 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1106 {
1107 #if debug_enabled(DBG_FIFO)
1108     u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1109     u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1110     if (!(fifocnt & 0x40))
1111         dprintkdbg(DBG_FIFO,
1112             "clear_fifo: (%i bytes) on phase %02x in %s\n",
1113             fifocnt & 0x3f, lines, txt);
1114 #endif
1115     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1116 }
1117
1118
1119 static void reset_dev_param(struct AdapterCtlBlk *acb)
1120 {
1121     struct DeviceCtlBlk *dcb;
1122     struct NvRamType *eeprom = &acb->eeprom;
1123     dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1124
1125     list_for_each_entry(dcb, &acb->dcb_list, list) {
1126         u8 period_index;
1127
1128         dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1129         dcb->sync_period = 0;
1130         dcb->sync_offset = 0;
1131
1132         dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1133         period_index = eeprom->target[dcb->target_id].period & 0x07;
1134         dcb->min_nego_period = clock_period[period_index];
1135         if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1136             || !(acb->config & HCC_WIDE_CARD))
1137             dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1138     }
1139 }
1140
1141
1142 /*
1143  * perform a hard reset on the SCSI bus
1144  * @cmd - some command for this host (for fetching hooks)
1145  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1146  */
1147 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1148 {
1149     struct AdapterCtlBlk *acb =
1150         (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1151     dprintkl(KERN_INFO,
1152         "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1153         cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1154
1155     if (timer_pending(&acb->waiting_timer))
1156         del_timer(&acb->waiting_timer);
1157
1158     /*
1159      * disable interrupt
1160      */
1161     DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1162     DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1163     DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1164     DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1165
1166     reset_scsi_bus(acb);
1167     udelay(500);
1168
1169     /* We may be in serious trouble. Wait some seconds */
1170     acb->last_reset =
1171         jiffies + 3 * HZ / 2 +
1172         HZ * acb->eeprom.delay_time;
1173
1174     /*
1175      * re-enable interrupt
1176      */
1177     /* Clear SCSI FIFO          */
1178     DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1179     clear_fifo(acb, "eh_bus_reset");
1180     /* Delete pending IRQ */
1181     DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1182     set_basic_config(acb);
1183
1184     reset_dev_param(acb);
1185     doing_srb_done(acb, DID_RESET, cmd, 0);
1186     acb->active_dcb = NULL;
1187     acb->acb_flag = 0;  /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1188     waiting_process_next(acb);
1189
1190     return SUCCESS;
1191 }
1192
1193 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1194 {
1195     int rc;
1196
1197     spin_lock_irq(cmd->device->host->host_lock);
1198     rc = __dc395x_eh_bus_reset(cmd);
1199     spin_unlock_irq(cmd->device->host->host_lock);
1200
1201     return rc;
1202 }
1203
1204 /*
1205  * abort an errant SCSI command
1206  * @cmd - command to be aborted
1207  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1208  */
1209 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1210 {
1211     /*
1212      * Look into our command queues: If it has not been sent already,
1213      * we remove it and return success. Otherwise fail.
1214      */
1215     struct AdapterCtlBlk *acb =
1216         (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1217     struct DeviceCtlBlk *dcb;
1218     struct ScsiReqBlk *srb;
1219     dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1220         cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1221
1222     dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1223     if (!dcb) {
1224         dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1225         return FAILED;
1226     }
1227
1228     srb = find_cmd(cmd, &dcb->srb_waiting_list);
1229     if (srb) {
1230         list_del(&srb->list);
1231         pci_unmap_srb_sense(acb, srb);
1232         pci_unmap_srb(acb, srb);
1233         free_tag(dcb, srb);
1234         list_add_tail(&srb->list, &acb->srb_free_list);
1235         dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1236         set_host_byte(cmd, DID_ABORT);
1237         return SUCCESS;
1238     }
1239     srb = find_cmd(cmd, &dcb->srb_going_list);
1240     if (srb) {
1241         dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1242         /* XXX: Should abort the command here */
1243     } else {
1244         dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1245     }
1246     return FAILED;
1247 }
1248
1249
1250 /* SDTR */
1251 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1252         struct ScsiReqBlk *srb)
1253 {
1254     u8 *ptr = srb->msgout_buf + srb->msg_count;
1255     if (srb->msg_count > 1) {
1256         dprintkl(KERN_INFO,
1257             "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1258             srb->msg_count, srb->msgout_buf[0],
1259             srb->msgout_buf[1]);
1260         return;
1261     }
1262     if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1263         dcb->sync_offset = 0;
1264         dcb->min_nego_period = 200 >> 2;
1265     } else if (dcb->sync_offset == 0)
1266         dcb->sync_offset = SYNC_NEGO_OFFSET;
1267
1268     srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period,
1269                         dcb->sync_offset);
1270     srb->state |= SRB_DO_SYNC_NEGO;
1271 }
1272
1273
1274 /* WDTR */
1275 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1276         struct ScsiReqBlk *srb)
1277 {
1278     u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1279            (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1280     u8 *ptr = srb->msgout_buf + srb->msg_count;
1281     if (srb->msg_count > 1) {
1282         dprintkl(KERN_INFO,
1283             "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1284             srb->msg_count, srb->msgout_buf[0],
1285             srb->msgout_buf[1]);
1286         return;
1287     }
1288     srb->msg_count += spi_populate_width_msg(ptr, wide);
1289     srb->state |= SRB_DO_WIDE_NEGO;
1290 }
1291
1292
1293 #if 0
1294 /* Timer to work around chip flaw: When selecting and the bus is
1295  * busy, we sometimes miss a Selection timeout IRQ */
1296 void selection_timeout_missed(unsigned long ptr);
1297 /* Sets the timer to wake us up */
1298 static void selto_timer(struct AdapterCtlBlk *acb)
1299 {
1300     if (timer_pending(&acb->selto_timer))
1301         return;
1302     acb->selto_timer.function = selection_timeout_missed;
1303     acb->selto_timer.data = (unsigned long) acb;
1304     if (time_before
1305         (jiffies + HZ, acb->last_reset + HZ / 2))
1306         acb->selto_timer.expires =
1307             acb->last_reset + HZ / 2 + 1;
1308     else
1309         acb->selto_timer.expires = jiffies + HZ + 1;
1310     add_timer(&acb->selto_timer);
1311 }
1312
1313
1314 void selection_timeout_missed(unsigned long ptr)
1315 {
1316     unsigned long flags;
1317     struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1318     struct ScsiReqBlk *srb;
1319     dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1320     if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1321         dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1322         return;
1323     }
1324     DC395x_LOCK_IO(acb->scsi_host, flags);
1325     srb = acb->active_dcb->active_srb;
1326     disconnect(acb);
1327     DC395x_UNLOCK_IO(acb->scsi_host, flags);
1328 }
1329 #endif
1330
1331
1332 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1333         struct ScsiReqBlk* srb)
1334 {
1335     u16 __maybe_unused s_stat2, return_code;
1336     u8 s_stat, scsicommand, i, identify_message;
1337     u8 *ptr;
1338     dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1339         dcb->target_id, dcb->target_lun, srb);
1340
1341     srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1342
1343     s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1344     s_stat2 = 0;
1345     s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1346 #if 1
1347     if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1348         dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1349             s_stat, s_stat2);
1350         /*
1351          * Try anyway?
1352          *
1353          * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1354          * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1355          * (This is likely to be a bug in the hardware. Obviously, most people
1356          *  only have one initiator per SCSI bus.)
1357          * Instead let this fail and have the timer make sure the command is
1358          * tried again after a short time
1359          */
1360         /*selto_timer (acb); */
1361         return 1;
1362     }
1363 #endif
1364     if (acb->active_dcb) {
1365         dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1366             "command while another command (0x%p) is active.",
1367             srb->cmd,
1368             acb->active_dcb->active_srb ?
1369                 acb->active_dcb->active_srb->cmd : 0);
1370         return 1;
1371     }
1372     if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1373         dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1374         return 1;
1375     }
1376     /* Allow starting of SCSI commands half a second before we allow the mid-level
1377      * to queue them again after a reset */
1378     if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1379         dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1380         return 1;
1381     }
1382
1383     /* Flush FIFO */
1384     clear_fifo(acb, "start_scsi");
1385     DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1386     DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1387     DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1388     DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1389     srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1390
1391     identify_message = dcb->identify_msg;
1392     /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1393     /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1394     if (srb->flag & AUTO_REQSENSE)
1395         identify_message &= 0xBF;
1396
1397     if (((srb->cmd->cmnd[0] == INQUIRY)
1398          || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1399          || (srb->flag & AUTO_REQSENSE))
1400         && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1401          && !(dcb->sync_mode & WIDE_NEGO_DONE))
1402         || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1403             && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1404         && (dcb->target_lun == 0)) {
1405         srb->msgout_buf[0] = identify_message;
1406         srb->msg_count = 1;
1407         scsicommand = SCMD_SEL_ATNSTOP;
1408         srb->state = SRB_MSGOUT;
1409 #ifndef SYNC_FIRST
1410         if (dcb->sync_mode & WIDE_NEGO_ENABLE
1411             && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1412             build_wdtr(acb, dcb, srb);
1413             goto no_cmd;
1414         }
1415 #endif
1416         if (dcb->sync_mode & SYNC_NEGO_ENABLE
1417             && dcb->inquiry7 & SCSI_INQ_SYNC) {
1418             build_sdtr(acb, dcb, srb);
1419             goto no_cmd;
1420         }
1421         if (dcb->sync_mode & WIDE_NEGO_ENABLE
1422             && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1423             build_wdtr(acb, dcb, srb);
1424             goto no_cmd;
1425         }
1426         srb->msg_count = 0;
1427     }
1428     /* Send identify message */
1429     DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1430
1431     scsicommand = SCMD_SEL_ATN;
1432     srb->state = SRB_START_;
1433 #ifndef DC395x_NO_TAGQ
1434     if ((dcb->sync_mode & EN_TAG_QUEUEING)
1435         && (identify_message & 0xC0)) {
1436         /* Send Tag message */
1437         u32 tag_mask = 1;
1438         u8 tag_number = 0;
1439         while (tag_mask & dcb->tag_mask
1440                && tag_number < dcb->max_command) {
1441             tag_mask = tag_mask << 1;
1442             tag_number++;
1443         }
1444         if (tag_number >= dcb->max_command) {
1445             dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1446                 "Out of tags target=<%02i-%i>)\n",
1447                 srb->cmd, srb->cmd->device->id,
1448                 (u8)srb->cmd->device->lun);
1449             srb->state = SRB_READY;
1450             DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1451                        DO_HWRESELECT);
1452             return 1;
1453         }
1454         /* Send Tag id */
1455         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG);
1456         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1457         dcb->tag_mask |= tag_mask;
1458         srb->tag_number = tag_number;
1459         scsicommand = SCMD_SEL_ATN3;
1460         srb->state = SRB_START_;
1461     }
1462 #endif
1463 /*polling:*/
1464     /* Send CDB ..command block ......... */
1465     dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1466         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1467         srb->cmd->cmnd[0], srb->tag_number);
1468     if (srb->flag & AUTO_REQSENSE) {
1469         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1470         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1471         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1472         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1473         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1474         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1475     } else {
1476         ptr = (u8 *)srb->cmd->cmnd;
1477         for (i = 0; i < srb->cmd->cmd_len; i++)
1478             DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1479     }
1480       no_cmd:
1481     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1482                DO_HWRESELECT | DO_DATALATCH);
1483     if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1484         /*
1485          * If start_scsi return 1:
1486          * we caught an interrupt (must be reset or reselection ... )
1487          * : Let's process it first!
1488          */
1489         dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1490             srb->cmd, dcb->target_id, dcb->target_lun);
1491         srb->state = SRB_READY;
1492         free_tag(dcb, srb);
1493         srb->msg_count = 0;
1494         return_code = 1;
1495         /* This IRQ should NOT get lost, as we did not acknowledge it */
1496     } else {
1497         /*
1498          * If start_scsi returns 0:
1499          * we know that the SCSI processor is free
1500          */
1501         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1502         dcb->active_srb = srb;
1503         acb->active_dcb = dcb;
1504         return_code = 0;
1505         /* it's important for atn stop */
1506         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1507                    DO_DATALATCH | DO_HWRESELECT);
1508         /* SCSI command */
1509         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1510     }
1511     return return_code;
1512 }
1513
1514
1515 #define DC395x_ENABLE_MSGOUT \
1516  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1517  srb->state |= SRB_MSGOUT
1518
1519
1520 /* abort command */
1521 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1522         struct ScsiReqBlk *srb)
1523 {
1524     srb->msgout_buf[0] = ABORT;
1525     srb->msg_count = 1;
1526     DC395x_ENABLE_MSGOUT;
1527     srb->state &= ~SRB_MSGIN;
1528     srb->state |= SRB_MSGOUT;
1529 }
1530
1531
1532 /**
1533  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1534  *                           have been triggered for this card.
1535  *
1536  * @acb:     a pointer to the adpter control block
1537  * @scsi_status: the status return when we checked the card
1538  **/
1539 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1540         u16 scsi_status)
1541 {
1542     struct DeviceCtlBlk *dcb;
1543     struct ScsiReqBlk *srb;
1544     u16 phase;
1545     u8 scsi_intstatus;
1546     unsigned long flags;
1547     void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1548                   u16 *);
1549
1550     DC395x_LOCK_IO(acb->scsi_host, flags);
1551
1552     /* This acknowledges the IRQ */
1553     scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1554     if ((scsi_status & 0x2007) == 0x2002)
1555         dprintkl(KERN_DEBUG,
1556             "COP after COP completed? %04x\n", scsi_status);
1557     if (debug_enabled(DBG_KG)) {
1558         if (scsi_intstatus & INT_SELTIMEOUT)
1559             dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1560     }
1561     /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1562
1563     if (timer_pending(&acb->selto_timer))
1564         del_timer(&acb->selto_timer);
1565
1566     if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1567         disconnect(acb);    /* bus free interrupt  */
1568         goto out_unlock;
1569     }
1570     if (scsi_intstatus & INT_RESELECTED) {
1571         reselect(acb);
1572         goto out_unlock;
1573     }
1574     if (scsi_intstatus & INT_SELECT) {
1575         dprintkl(KERN_INFO, "Host does not support target mode!\n");
1576         goto out_unlock;
1577     }
1578     if (scsi_intstatus & INT_SCSIRESET) {
1579         scsi_reset_detect(acb);
1580         goto out_unlock;
1581     }
1582     if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1583         dcb = acb->active_dcb;
1584         if (!dcb) {
1585             dprintkl(KERN_DEBUG,
1586                 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1587                 scsi_status, scsi_intstatus);
1588             goto out_unlock;
1589         }
1590         srb = dcb->active_srb;
1591         if (dcb->flag & ABORT_DEV_) {
1592             dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1593             enable_msgout_abort(acb, srb);
1594         }
1595
1596         /* software sequential machine */
1597         phase = (u16)srb->scsi_phase;
1598
1599         /*
1600          * 62037 or 62137
1601          * call  dc395x_scsi_phase0[]... "phase entry"
1602          * handle every phase before start transfer
1603          */
1604         /* data_out_phase0, phase:0 */
1605         /* data_in_phase0,  phase:1 */
1606         /* command_phase0,  phase:2 */
1607         /* status_phase0,   phase:3 */
1608         /* nop0,        phase:4 PH_BUS_FREE .. initial phase */
1609         /* nop0,        phase:5 PH_BUS_FREE .. initial phase */
1610         /* msgout_phase0,   phase:6 */
1611         /* msgin_phase0,    phase:7 */
1612         dc395x_statev = dc395x_scsi_phase0[phase];
1613         dc395x_statev(acb, srb, &scsi_status);
1614
1615         /*
1616          * if there were any exception occurred scsi_status
1617          * will be modify to bus free phase new scsi_status
1618          * transfer out from ... previous dc395x_statev
1619          */
1620         srb->scsi_phase = scsi_status & PHASEMASK;
1621         phase = (u16)scsi_status & PHASEMASK;
1622
1623         /*
1624          * call  dc395x_scsi_phase1[]... "phase entry" handle
1625          * every phase to do transfer
1626          */
1627         /* data_out_phase1, phase:0 */
1628         /* data_in_phase1,  phase:1 */
1629         /* command_phase1,  phase:2 */
1630         /* status_phase1,   phase:3 */
1631         /* nop1,        phase:4 PH_BUS_FREE .. initial phase */
1632         /* nop1,        phase:5 PH_BUS_FREE .. initial phase */
1633         /* msgout_phase1,   phase:6 */
1634         /* msgin_phase1,    phase:7 */
1635         dc395x_statev = dc395x_scsi_phase1[phase];
1636         dc395x_statev(acb, srb, &scsi_status);
1637     }
1638       out_unlock:
1639     DC395x_UNLOCK_IO(acb->scsi_host, flags);
1640 }
1641
1642
1643 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1644 {
1645     struct AdapterCtlBlk *acb = dev_id;
1646     u16 scsi_status;
1647     u8 dma_status;
1648     irqreturn_t handled = IRQ_NONE;
1649
1650     /*
1651      * Check for pending interrupt
1652      */
1653     scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1654     dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1655     if (scsi_status & SCSIINTERRUPT) {
1656         /* interrupt pending - let's process it! */
1657         dc395x_handle_interrupt(acb, scsi_status);
1658         handled = IRQ_HANDLED;
1659     }
1660     else if (dma_status & 0x20) {
1661         /* Error from the DMA engine */
1662         dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1663 #if 0
1664         dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1665         if (acb->active_dcb) {
1666             acb->active_dcb-> flag |= ABORT_DEV_;
1667             if (acb->active_dcb->active_srb)
1668                 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1669         }
1670         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1671 #else
1672         dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1673         acb = NULL;
1674 #endif
1675         handled = IRQ_HANDLED;
1676     }
1677
1678     return handled;
1679 }
1680
1681
1682 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1683         u16 *pscsi_status)
1684 {
1685     dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1686     if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1687         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
1688
1689     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
1690     srb->state &= ~SRB_MSGOUT;
1691 }
1692
1693
1694 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1695         u16 *pscsi_status)
1696 {
1697     u16 i;
1698     u8 *ptr;
1699     dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1700
1701     clear_fifo(acb, "msgout_phase1");
1702     if (!(srb->state & SRB_MSGOUT)) {
1703         srb->state |= SRB_MSGOUT;
1704         dprintkl(KERN_DEBUG,
1705             "msgout_phase1: (0x%p) Phase unexpected\n",
1706             srb->cmd);  /* So what ? */
1707     }
1708     if (!srb->msg_count) {
1709         dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1710             srb->cmd);
1711         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP);
1712         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1713         /* it's important for atn stop */
1714         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1715         return;
1716     }
1717     ptr = (u8 *)srb->msgout_buf;
1718     for (i = 0; i < srb->msg_count; i++)
1719         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1720     srb->msg_count = 0;
1721     if (srb->msgout_buf[0] == ABORT_TASK_SET)
1722         srb->state = SRB_ABORT_SENT;
1723
1724     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1725 }
1726
1727
1728 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1729         u16 *pscsi_status)
1730 {
1731     dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1732     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1733 }
1734
1735
1736 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1737         u16 *pscsi_status)
1738 {
1739     struct DeviceCtlBlk *dcb;
1740     u8 *ptr;
1741     u16 i;
1742     dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1743
1744     clear_fifo(acb, "command_phase1");
1745     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1746     if (!(srb->flag & AUTO_REQSENSE)) {
1747         ptr = (u8 *)srb->cmd->cmnd;
1748         for (i = 0; i < srb->cmd->cmd_len; i++) {
1749             DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1750             ptr++;
1751         }
1752     } else {
1753         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1754         dcb = acb->active_dcb;
1755         /* target id */
1756         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1757         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1758         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1759         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1760         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1761     }
1762     srb->state |= SRB_COMMAND;
1763     /* it's important for atn stop */
1764     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1765     /* SCSI command */
1766     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1767 }
1768
1769
1770 /*
1771  * Verify that the remaining space in the hw sg lists is the same as
1772  * the count of remaining bytes in srb->total_xfer_length
1773  */
1774 static void sg_verify_length(struct ScsiReqBlk *srb)
1775 {
1776     if (debug_enabled(DBG_SG)) {
1777         unsigned len = 0;
1778         unsigned idx = srb->sg_index;
1779         struct SGentry *psge = srb->segment_x + idx;
1780         for (; idx < srb->sg_count; psge++, idx++)
1781             len += psge->length;
1782         if (len != srb->total_xfer_length)
1783             dprintkdbg(DBG_SG,
1784                    "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1785                    srb->total_xfer_length, len);
1786     }
1787 }
1788
1789
1790 /*
1791  * Compute the next Scatter Gather list index and adjust its length
1792  * and address if necessary
1793  */
1794 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1795 {
1796     u8 idx;
1797     u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1798     struct SGentry *psge = srb->segment_x + srb->sg_index;
1799
1800     dprintkdbg(DBG_0,
1801         "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1802         xferred, srb->total_xfer_length, left);
1803     if (xferred == 0) {
1804         /* nothing to update since we did not transfer any data */
1805         return;
1806     }
1807
1808     sg_verify_length(srb);
1809     srb->total_xfer_length = left;  /* update remaining count */
1810     for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1811         if (xferred >= psge->length) {
1812             /* Complete SG entries done */
1813             xferred -= psge->length;
1814         } else {
1815             /* Partial SG entry done */
1816             dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1817                     srb->sg_bus_addr, SEGMENTX_LEN,
1818                     DMA_TO_DEVICE);
1819             psge->length -= xferred;
1820             psge->address += xferred;
1821             srb->sg_index = idx;
1822             dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1823                     srb->sg_bus_addr, SEGMENTX_LEN,
1824                     DMA_TO_DEVICE);
1825             break;
1826         }
1827         psge++;
1828     }
1829     sg_verify_length(srb);
1830 }
1831
1832
1833 /*
1834  * We have transferred a single byte (PIO mode?) and need to update
1835  * the count of bytes remaining (total_xfer_length) and update the sg
1836  * entry to either point to next byte in the current sg entry, or of
1837  * already at the end to point to the start of the next sg entry
1838  */
1839 static void sg_subtract_one(struct ScsiReqBlk *srb)
1840 {
1841     sg_update_list(srb, srb->total_xfer_length - 1);
1842 }
1843
1844
1845 /*
1846  * cleanup_after_transfer
1847  *
1848  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1849  * KG: Currently called from  StatusPhase1 ()
1850  * Should probably also be called from other places
1851  * Best might be to call it in DataXXPhase0, if new phase will differ
1852  */
1853 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1854         struct ScsiReqBlk *srb)
1855 {
1856     /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1857     if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {   /* read */
1858         if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1859             clear_fifo(acb, "cleanup/in");
1860         if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1861             DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1862     } else {        /* write */
1863         if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1864             DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1865         if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1866             clear_fifo(acb, "cleanup/out");
1867     }
1868     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1869 }
1870
1871
1872 /*
1873  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1874  * Seems to be needed for unknown reasons; could be a hardware bug :-(
1875  */
1876 #define DC395x_LASTPIO 4
1877
1878
1879 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1880         u16 *pscsi_status)
1881 {
1882     struct DeviceCtlBlk *dcb = srb->dcb;
1883     u16 scsi_status = *pscsi_status;
1884     u32 d_left_counter = 0;
1885     dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1886         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1887
1888     /*
1889      * KG: We need to drain the buffers before we draw any conclusions!
1890      * This means telling the DMA to push the rest into SCSI, telling
1891      * SCSI to push the rest to the bus.
1892      * However, the device might have been the one to stop us (phase
1893      * change), and the data in transit just needs to be accounted so
1894      * it can be retransmitted.)
1895      */
1896     /*
1897      * KG: Stop DMA engine pushing more data into the SCSI FIFO
1898      * If we need more data, the DMA SG list will be freshly set up, anyway
1899      */
1900     dprintkdbg(DBG_PIO, "data_out_phase0: "
1901         "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1902         "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1903         DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1904         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1905         DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1906         DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1907         srb->total_xfer_length);
1908     DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1909
1910     if (!(srb->state & SRB_XFERPAD)) {
1911         if (scsi_status & PARITYERROR)
1912             srb->status |= PARITY_ERROR;
1913
1914         /*
1915          * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1916          * is the no of bytes it got from the DMA engine not the no it
1917          * transferred successfully to the device. (And the difference could
1918          * be as much as the FIFO size, I guess ...)
1919          */
1920         if (!(scsi_status & SCSIXFERDONE)) {
1921             /*
1922              * when data transfer from DMA FIFO to SCSI FIFO
1923              * if there was some data left in SCSI FIFO
1924              */
1925             d_left_counter =
1926                 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1927                   0x1F);
1928             if (dcb->sync_period & WIDE_SYNC)
1929                 d_left_counter <<= 1;
1930
1931             dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1932                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1933                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1934                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1935                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1936                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1937                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1938                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1939                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1940                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1941         }
1942         /*
1943          * calculate all the residue data that not yet tranfered
1944          * SCSI transfer counter + left in SCSI FIFO data
1945          *
1946          * .....TRM_S1040_SCSI_COUNTER (24bits)
1947          * The counter always decrement by one for every SCSI byte transfer.
1948          * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1949          * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1950          */
1951         if (srb->total_xfer_length > DC395x_LASTPIO)
1952             d_left_counter +=
1953                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1954
1955         /* Is this a good idea? */
1956         /*clear_fifo(acb, "DOP1"); */
1957         /* KG: What is this supposed to be useful for? WIDE padding stuff? */
1958         if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1959             && scsi_bufflen(srb->cmd) % 2) {
1960             d_left_counter = 0;
1961             dprintkl(KERN_INFO,
1962                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
1963                 scsi_status);
1964         }
1965         /*
1966          * KG: Oops again. Same thinko as above: The SCSI might have been
1967          * faster than the DMA engine, so that it ran out of data.
1968          * In that case, we have to do just nothing!
1969          * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1970          */
1971         /*
1972          * KG: This is nonsense: We have been WRITING data to the bus
1973          * If the SCSI engine has no bytes left, how should the DMA engine?
1974          */
1975         if (d_left_counter == 0) {
1976             srb->total_xfer_length = 0;
1977         } else {
1978             /*
1979              * if transfer not yet complete
1980              * there were some data residue in SCSI FIFO or
1981              * SCSI transfer counter not empty
1982              */
1983             long oldxferred =
1984                 srb->total_xfer_length - d_left_counter;
1985             const int diff =
1986                 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
1987             sg_update_list(srb, d_left_counter);
1988             /* KG: Most ugly hack! Apparently, this works around a chip bug */
1989             if ((srb->segment_x[srb->sg_index].length ==
1990                  diff && scsi_sg_count(srb->cmd))
1991                 || ((oldxferred & ~PAGE_MASK) ==
1992                 (PAGE_SIZE - diff))
1993                 ) {
1994                 dprintkl(KERN_INFO, "data_out_phase0: "
1995                     "Work around chip bug (%i)?\n", diff);
1996                 d_left_counter =
1997                     srb->total_xfer_length - diff;
1998                 sg_update_list(srb, d_left_counter);
1999                 /*srb->total_xfer_length -= diff; */
2000                 /*srb->virt_addr += diff; */
2001                 /*if (srb->cmd->use_sg) */
2002                 /*      srb->sg_index++; */
2003             }
2004         }
2005     }
2006     if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2007         cleanup_after_transfer(acb, srb);
2008     }
2009 }
2010
2011
2012 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2013         u16 *pscsi_status)
2014 {
2015     dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2016         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2017     clear_fifo(acb, "data_out_phase1");
2018     /* do prepare before transfer when data out phase */
2019     data_io_transfer(acb, srb, XFERDATAOUT);
2020 }
2021
2022 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2023         u16 *pscsi_status)
2024 {
2025     u16 scsi_status = *pscsi_status;
2026
2027     dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2028         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2029
2030     /*
2031      * KG: DataIn is much more tricky than DataOut. When the device is finished
2032      * and switches to another phase, the SCSI engine should be finished too.
2033      * But: There might still be bytes left in its FIFO to be fetched by the DMA
2034      * engine and transferred to memory.
2035      * We should wait for the FIFOs to be emptied by that (is there any way to
2036      * enforce this?) and then stop the DMA engine, because it might think, that
2037      * there are more bytes to follow. Yes, the device might disconnect prior to
2038      * having all bytes transferred!
2039      * Also we should make sure that all data from the DMA engine buffer's really
2040      * made its way to the system memory! Some documentation on this would not
2041      * seem to be a bad idea, actually.
2042      */
2043     if (!(srb->state & SRB_XFERPAD)) {
2044         u32 d_left_counter;
2045         unsigned int sc, fc;
2046
2047         if (scsi_status & PARITYERROR) {
2048             dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2049                 "Parity Error\n", srb->cmd);
2050             srb->status |= PARITY_ERROR;
2051         }
2052         /*
2053          * KG: We should wait for the DMA FIFO to be empty ...
2054          * but: it would be better to wait first for the SCSI FIFO and then the
2055          * the DMA FIFO to become empty? How do we know, that the device not already
2056          * sent data to the FIFO in a MsgIn phase, eg.?
2057          */
2058         if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2059 #if 0
2060             int ctr = 6000000;
2061             dprintkl(KERN_DEBUG,
2062                 "DIP0: Wait for DMA FIFO to flush ...\n");
2063             /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2064             /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2065             /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2066             while (!
2067                    (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2068                 0x80) && --ctr);
2069             if (ctr < 6000000 - 1)
2070                 dprintkl(KERN_DEBUG
2071                        "DIP0: Had to wait for DMA ...\n");
2072             if (!ctr)
2073                 dprintkl(KERN_ERR,
2074                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2075             /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2076 #endif
2077             dprintkdbg(DBG_KG, "data_in_phase0: "
2078                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2079                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2080                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2081         }
2082         /* Now: Check remainig data: The SCSI counters should tell us ... */
2083         sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2084         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2085         d_left_counter = sc + ((fc & 0x1f)
2086                << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2087                0));
2088         dprintkdbg(DBG_KG, "data_in_phase0: "
2089             "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2090             "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2091             "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2092             fc,
2093             (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094             sc,
2095             fc,
2096             DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2097             DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2098             srb->total_xfer_length, d_left_counter);
2099 #if DC395x_LASTPIO
2100         /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2101         if (d_left_counter
2102             && srb->total_xfer_length <= DC395x_LASTPIO) {
2103             size_t left_io = srb->total_xfer_length;
2104
2105             /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2106             /*sg_update_list (srb, d_left_counter); */
2107             dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2108                    "for remaining %i bytes:",
2109                 fc & 0x1f,
2110                 (srb->dcb->sync_period & WIDE_SYNC) ?
2111                     "words" : "bytes",
2112                 srb->total_xfer_length);
2113             if (srb->dcb->sync_period & WIDE_SYNC)
2114                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2115                           CFG2_WIDEFIFO);
2116             while (left_io) {
2117                 unsigned char *virt, *base = NULL;
2118                 unsigned long flags = 0;
2119                 size_t len = left_io;
2120                 size_t offset = srb->request_length - left_io;
2121
2122                 local_irq_save(flags);
2123                 /* Assumption: it's inside one page as it's at most 4 bytes and
2124                    I just assume it's on a 4-byte boundary */
2125                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2126                                srb->sg_count, &offset, &len);
2127                 virt = base + offset;
2128
2129                 left_io -= len;
2130
2131                 while (len) {
2132                     u8 byte;
2133                     byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2134                     *virt++ = byte;
2135
2136                     if (debug_enabled(DBG_PIO))
2137                         printk(" %02x", byte);
2138
2139                     d_left_counter--;
2140                     sg_subtract_one(srb);
2141
2142                     len--;
2143
2144                     fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2145
2146                     if (fc == 0x40) {
2147                         left_io = 0;
2148                         break;
2149                     }
2150                 }
2151
2152                 WARN_ON((fc != 0x40) == !d_left_counter);
2153
2154                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2155                     /* Read the last byte ... */
2156                     if (srb->total_xfer_length > 0) {
2157                         u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2158
2159                         *virt++ = byte;
2160                         srb->total_xfer_length--;
2161                         if (debug_enabled(DBG_PIO))
2162                             printk(" %02x", byte);
2163                     }
2164
2165                     DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2166                 }
2167
2168                 scsi_kunmap_atomic_sg(base);
2169                 local_irq_restore(flags);
2170             }
2171             /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2172             /*srb->total_xfer_length = 0; */
2173             if (debug_enabled(DBG_PIO))
2174                 printk("\n");
2175         }
2176 #endif              /* DC395x_LASTPIO */
2177
2178 #if 0
2179         /*
2180          * KG: This was in DATAOUT. Does it also belong here?
2181          * Nobody seems to know what counter and fifo_cnt count exactly ...
2182          */
2183         if (!(scsi_status & SCSIXFERDONE)) {
2184             /*
2185              * when data transfer from DMA FIFO to SCSI FIFO
2186              * if there was some data left in SCSI FIFO
2187              */
2188             d_left_counter =
2189                 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2190                   0x1F);
2191             if (srb->dcb->sync_period & WIDE_SYNC)
2192                 d_left_counter <<= 1;
2193             /*
2194              * if WIDE scsi SCSI FIFOCNT unit is word !!!
2195              * so need to *= 2
2196              * KG: Seems to be correct ...
2197              */
2198         }
2199 #endif
2200         /* KG: This should not be needed any more! */
2201         if (d_left_counter == 0
2202             || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2203 #if 0
2204             int ctr = 6000000;
2205             u8 TempDMAstatus;
2206             do {
2207                 TempDMAstatus =
2208                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2209             } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2210             if (!ctr)
2211                 dprintkl(KERN_ERR,
2212                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2213             srb->total_xfer_length = 0;
2214 #endif
2215             srb->total_xfer_length = d_left_counter;
2216         } else {    /* phase changed */
2217             /*
2218              * parsing the case:
2219              * when a transfer not yet complete
2220              * but be disconnected by target
2221              * if transfer not yet complete
2222              * there were some data residue in SCSI FIFO or
2223              * SCSI transfer counter not empty
2224              */
2225             sg_update_list(srb, d_left_counter);
2226         }
2227     }
2228     /* KG: The target may decide to disconnect: Empty FIFO before! */
2229     if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2230         cleanup_after_transfer(acb, srb);
2231     }
2232 }
2233
2234
2235 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2236         u16 *pscsi_status)
2237 {
2238     dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2239         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2240     data_io_transfer(acb, srb, XFERDATAIN);
2241 }
2242
2243
2244 static void data_io_transfer(struct AdapterCtlBlk *acb,
2245         struct ScsiReqBlk *srb, u16 io_dir)
2246 {
2247     struct DeviceCtlBlk *dcb = srb->dcb;
2248     u8 bval;
2249     dprintkdbg(DBG_0,
2250         "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2251         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2252         ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2253         srb->total_xfer_length, srb->sg_index, srb->sg_count);
2254     if (srb == acb->tmp_srb)
2255         dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2256     if (srb->sg_index >= srb->sg_count) {
2257         /* can't happen? out of bounds error */
2258         return;
2259     }
2260
2261     if (srb->total_xfer_length > DC395x_LASTPIO) {
2262         u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2263         /*
2264          * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2265          * Maybe, even ABORTXFER would be appropriate
2266          */
2267         if (dma_status & XFERPENDING) {
2268             dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2269                 "Expect trouble!\n");
2270             dump_register_info(acb, dcb, srb);
2271             DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2272         }
2273         /* clear_fifo(acb, "IO"); */
2274         /*
2275          * load what physical address of Scatter/Gather list table
2276          * want to be transfer
2277          */
2278         srb->state |= SRB_DATA_XFER;
2279         DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2280         if (scsi_sg_count(srb->cmd)) {  /* with S/G */
2281             io_dir |= DMACMD_SG;
2282             DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2283                        srb->sg_bus_addr +
2284                        sizeof(struct SGentry) *
2285                        srb->sg_index);
2286             /* load how many bytes in the sg list table */
2287             DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2288                        ((u32)(srb->sg_count -
2289                           srb->sg_index) << 3));
2290         } else {    /* without S/G */
2291             io_dir &= ~DMACMD_SG;
2292             DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2293                        srb->segment_x[0].address);
2294             DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2295                        srb->segment_x[0].length);
2296         }
2297         /* load total transfer length (24bits) max value 16Mbyte */
2298         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2299                    srb->total_xfer_length);
2300         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2301         if (io_dir & DMACMD_DIR) {  /* read */
2302             DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2303                       SCMD_DMA_IN);
2304             DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2305         } else {
2306             DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2307             DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2308                       SCMD_DMA_OUT);
2309         }
2310
2311     }
2312 #if DC395x_LASTPIO
2313     else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2314         /*
2315          * load what physical address of Scatter/Gather list table
2316          * want to be transfer
2317          */
2318         srb->state |= SRB_DATA_XFER;
2319         /* load total transfer length (24bits) max value 16Mbyte */
2320         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2321                    srb->total_xfer_length);
2322         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2323         if (io_dir & DMACMD_DIR) {  /* read */
2324             DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2325                       SCMD_FIFO_IN);
2326         } else {    /* write */
2327             int ln = srb->total_xfer_length;
2328             size_t left_io = srb->total_xfer_length;
2329
2330             if (srb->dcb->sync_period & WIDE_SYNC)
2331                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2332                      CFG2_WIDEFIFO);
2333
2334             while (left_io) {
2335                 unsigned char *virt, *base = NULL;
2336                 unsigned long flags = 0;
2337                 size_t len = left_io;
2338                 size_t offset = srb->request_length - left_io;
2339
2340                 local_irq_save(flags);
2341                 /* Again, max 4 bytes */
2342                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2343                                srb->sg_count, &offset, &len);
2344                 virt = base + offset;
2345
2346                 left_io -= len;
2347
2348                 while (len--) {
2349                     if (debug_enabled(DBG_PIO))
2350                         printk(" %02x", *virt);
2351
2352                     DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2353
2354                     sg_subtract_one(srb);
2355                 }
2356
2357                 scsi_kunmap_atomic_sg(base);
2358                 local_irq_restore(flags);
2359             }
2360             if (srb->dcb->sync_period & WIDE_SYNC) {
2361                 if (ln % 2) {
2362                     DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2363                     if (debug_enabled(DBG_PIO))
2364                         printk(" |00");
2365                 }
2366                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2367             }
2368             /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2369             if (debug_enabled(DBG_PIO))
2370                 printk("\n");
2371             DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2372                       SCMD_FIFO_OUT);
2373         }
2374     }
2375 #endif              /* DC395x_LASTPIO */
2376     else {      /* xfer pad */
2377         if (srb->sg_count) {
2378             srb->adapter_status = H_OVER_UNDER_RUN;
2379             srb->status |= OVER_RUN;
2380         }
2381         /*
2382          * KG: despite the fact that we are using 16 bits I/O ops
2383          * the SCSI FIFO is only 8 bits according to the docs
2384          * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2385          */
2386         if (dcb->sync_period & WIDE_SYNC) {
2387             DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2388             DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2389                       CFG2_WIDEFIFO);
2390             if (io_dir & DMACMD_DIR) {
2391                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2392                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2393             } else {
2394                 /* Danger, Robinson: If you find KGs
2395                  * scattered over the wide disk, the driver
2396                  * or chip is to blame :-( */
2397                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2398                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2399             }
2400             DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2401         } else {
2402             DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2403             /* Danger, Robinson: If you find a collection of Ks on your disk
2404              * something broke :-( */
2405             if (io_dir & DMACMD_DIR)
2406                 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2407             else
2408                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2409         }
2410         srb->state |= SRB_XFERPAD;
2411         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2412         /* SCSI command */
2413         bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2414         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2415     }
2416 }
2417
2418
2419 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2420         u16 *pscsi_status)
2421 {
2422     dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2423         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2424     srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2425     srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);  /* get message */
2426     srb->state = SRB_COMPLETED;
2427     *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2428     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2429     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2430 }
2431
2432
2433 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2434         u16 *pscsi_status)
2435 {
2436     dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2437         srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2438     srb->state = SRB_STATUS;
2439     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2440     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2441 }
2442
2443
2444 /* Check if the message is complete */
2445 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2446 {
2447     if (*msgbuf == EXTENDED_MESSAGE) {
2448         if (len < 2)
2449             return 0;
2450         if (len < msgbuf[1] + 2)
2451             return 0;
2452     } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2453         if (len < 2)
2454             return 0;
2455     return 1;
2456 }
2457
2458 /* reject_msg */
2459 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2460         struct ScsiReqBlk *srb)
2461 {
2462     srb->msgout_buf[0] = MESSAGE_REJECT;
2463     srb->msg_count = 1;
2464     DC395x_ENABLE_MSGOUT;
2465     srb->state &= ~SRB_MSGIN;
2466     srb->state |= SRB_MSGOUT;
2467     dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2468         srb->msgin_buf[0],
2469         srb->dcb->target_id, srb->dcb->target_lun);
2470 }
2471
2472
2473 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2474         struct DeviceCtlBlk *dcb, u8 tag)
2475 {
2476     struct ScsiReqBlk *srb = NULL;
2477     struct ScsiReqBlk *i;
2478     dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2479            srb->cmd, tag, srb);
2480
2481     if (!(dcb->tag_mask & (1 << tag)))
2482         dprintkl(KERN_DEBUG,
2483             "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2484             dcb->tag_mask, tag);
2485
2486     if (list_empty(&dcb->srb_going_list))
2487         goto mingx0;
2488     list_for_each_entry(i, &dcb->srb_going_list, list) {
2489         if (i->tag_number == tag) {
2490             srb = i;
2491             break;
2492         }
2493     }
2494     if (!srb)
2495         goto mingx0;
2496
2497     dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2498         srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2499     if (dcb->flag & ABORT_DEV_) {
2500         /*srb->state = SRB_ABORT_SENT; */
2501         enable_msgout_abort(acb, srb);
2502     }
2503
2504     if (!(srb->state & SRB_DISCONNECT))
2505         goto mingx0;
2506
2507     memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2508     srb->state |= dcb->active_srb->state;
2509     srb->state |= SRB_DATA_XFER;
2510     dcb->active_srb = srb;
2511     /* How can we make the DORS happy? */
2512     return srb;
2513
2514       mingx0:
2515     srb = acb->tmp_srb;
2516     srb->state = SRB_UNEXPECT_RESEL;
2517     dcb->active_srb = srb;
2518     srb->msgout_buf[0] = ABORT_TASK;
2519     srb->msg_count = 1;
2520     DC395x_ENABLE_MSGOUT;
2521     dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2522     return srb;
2523 }
2524
2525
2526 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2527         struct DeviceCtlBlk *dcb)
2528 {
2529     DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2530     DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2531     DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2532     set_xfer_rate(acb, dcb);
2533 }
2534
2535
2536 /* set async transfer mode */
2537 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2538 {
2539     struct DeviceCtlBlk *dcb = srb->dcb;
2540     dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2541         dcb->target_id, dcb->target_lun);
2542
2543     dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2544     dcb->sync_mode |= SYNC_NEGO_DONE;
2545     /*dcb->sync_period &= 0; */
2546     dcb->sync_offset = 0;
2547     dcb->min_nego_period = 200 >> 2;    /* 200ns <=> 5 MHz */
2548     srb->state &= ~SRB_DO_SYNC_NEGO;
2549     reprogram_regs(acb, dcb);
2550     if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2551         && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2552         build_wdtr(acb, dcb, srb);
2553         DC395x_ENABLE_MSGOUT;
2554         dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2555     }
2556 }
2557
2558
2559 /* set sync transfer mode */
2560 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2561 {
2562     struct DeviceCtlBlk *dcb = srb->dcb;
2563     u8 bval;
2564     int fact;
2565     dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2566         "(%02i.%01i MHz) Offset %i\n",
2567         dcb->target_id, srb->msgin_buf[3] << 2,
2568         (250 / srb->msgin_buf[3]),
2569         ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2570         srb->msgin_buf[4]);
2571
2572     if (srb->msgin_buf[4] > 15)
2573         srb->msgin_buf[4] = 15;
2574     if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2575         dcb->sync_offset = 0;
2576     else if (dcb->sync_offset == 0)
2577         dcb->sync_offset = srb->msgin_buf[4];
2578     if (srb->msgin_buf[4] > dcb->sync_offset)
2579         srb->msgin_buf[4] = dcb->sync_offset;
2580     else
2581         dcb->sync_offset = srb->msgin_buf[4];
2582     bval = 0;
2583     while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2584                 || dcb->min_nego_period >
2585                 clock_period[bval]))
2586         bval++;
2587     if (srb->msgin_buf[3] < clock_period[bval])
2588         dprintkl(KERN_INFO,
2589             "msgin_set_sync: Increase sync nego period to %ins\n",
2590             clock_period[bval] << 2);
2591     srb->msgin_buf[3] = clock_period[bval];
2592     dcb->sync_period &= 0xf0;
2593     dcb->sync_period |= ALT_SYNC | bval;
2594     dcb->min_nego_period = srb->msgin_buf[3];
2595
2596     if (dcb->sync_period & WIDE_SYNC)
2597         fact = 500;
2598     else
2599         fact = 250;
2600
2601     dprintkl(KERN_INFO,
2602         "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2603         dcb->target_id, (fact == 500) ? "Wide16" : "",
2604         dcb->min_nego_period << 2, dcb->sync_offset,
2605         (fact / dcb->min_nego_period),
2606         ((fact % dcb->min_nego_period) * 10 +
2607         dcb->min_nego_period / 2) / dcb->min_nego_period);
2608
2609     if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2610         /* Reply with corrected SDTR Message */
2611         dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2612             srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2613
2614         memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2615         srb->msg_count = 5;
2616         DC395x_ENABLE_MSGOUT;
2617         dcb->sync_mode |= SYNC_NEGO_DONE;
2618     } else {
2619         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2620             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2621             build_wdtr(acb, dcb, srb);
2622             DC395x_ENABLE_MSGOUT;
2623             dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2624         }
2625     }
2626     srb->state &= ~SRB_DO_SYNC_NEGO;
2627     dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2628
2629     reprogram_regs(acb, dcb);
2630 }
2631
2632
2633 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2634         struct ScsiReqBlk *srb)
2635 {
2636     struct DeviceCtlBlk *dcb = srb->dcb;
2637     dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2638
2639     dcb->sync_period &= ~WIDE_SYNC;
2640     dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2641     dcb->sync_mode |= WIDE_NEGO_DONE;
2642     srb->state &= ~SRB_DO_WIDE_NEGO;
2643     reprogram_regs(acb, dcb);
2644     if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2645         && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2646         build_sdtr(acb, dcb, srb);
2647         DC395x_ENABLE_MSGOUT;
2648         dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2649     }
2650 }
2651
2652 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2653 {
2654     struct DeviceCtlBlk *dcb = srb->dcb;
2655     u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2656            && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2657     dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2658
2659     if (srb->msgin_buf[3] > wide)
2660         srb->msgin_buf[3] = wide;
2661     /* Completed */
2662     if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2663         dprintkl(KERN_DEBUG,
2664             "msgin_set_wide: Wide nego initiated <%02i>\n",
2665             dcb->target_id);
2666         memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2667         srb->msg_count = 4;
2668         srb->state |= SRB_DO_WIDE_NEGO;
2669         DC395x_ENABLE_MSGOUT;
2670     }
2671
2672     dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2673     if (srb->msgin_buf[3] > 0)
2674         dcb->sync_period |= WIDE_SYNC;
2675     else
2676         dcb->sync_period &= ~WIDE_SYNC;
2677     srb->state &= ~SRB_DO_WIDE_NEGO;
2678     /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2679     dprintkdbg(DBG_1,
2680         "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2681         (8 << srb->msgin_buf[3]), dcb->target_id);
2682     reprogram_regs(acb, dcb);
2683     if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2684         && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2685         build_sdtr(acb, dcb, srb);
2686         DC395x_ENABLE_MSGOUT;
2687         dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2688     }
2689 }
2690
2691
2692 /*
2693  * extended message codes:
2694  *
2695  *  code    description
2696  *
2697  *  02h Reserved
2698  *  00h MODIFY DATA  POINTER
2699  *  01h SYNCHRONOUS DATA TRANSFER REQUEST
2700  *  03h WIDE DATA TRANSFER REQUEST
2701  *   04h - 7Fh  Reserved
2702  *   80h - FFh  Vendor specific
2703  */
2704 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2705         u16 *pscsi_status)
2706 {
2707     struct DeviceCtlBlk *dcb = acb->active_dcb;
2708     dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2709
2710     srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2711     if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2712         /* Now eval the msg */
2713         switch (srb->msgin_buf[0]) {
2714         case DISCONNECT:
2715             srb->state = SRB_DISCONNECT;
2716             break;
2717
2718         case SIMPLE_QUEUE_TAG:
2719         case HEAD_OF_QUEUE_TAG:
2720         case ORDERED_QUEUE_TAG:
2721             srb =
2722                 msgin_qtag(acb, dcb,
2723                           srb->msgin_buf[1]);
2724             break;
2725
2726         case MESSAGE_REJECT:
2727             DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2728                        DO_CLRATN | DO_DATALATCH);
2729             /* A sync nego message was rejected ! */
2730             if (srb->state & SRB_DO_SYNC_NEGO) {
2731                 msgin_set_async(acb, srb);
2732                 break;
2733             }
2734             /* A wide nego message was rejected ! */
2735             if (srb->state & SRB_DO_WIDE_NEGO) {
2736                 msgin_set_nowide(acb, srb);
2737                 break;
2738             }
2739             enable_msgout_abort(acb, srb);
2740             /*srb->state |= SRB_ABORT_SENT */
2741             break;
2742
2743         case EXTENDED_MESSAGE:
2744             /* SDTR */
2745             if (srb->msgin_buf[1] == 3
2746                 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2747                 msgin_set_sync(acb, srb);
2748                 break;
2749             }
2750             /* WDTR */
2751             if (srb->msgin_buf[1] == 2
2752                 && srb->msgin_buf[2] == EXTENDED_WDTR
2753                 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2754                 msgin_set_wide(acb, srb);
2755                 break;
2756             }
2757             msgin_reject(acb, srb);
2758             break;
2759
2760         case IGNORE_WIDE_RESIDUE:
2761             /* Discard  wide residual */
2762             dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2763             break;
2764
2765         case COMMAND_COMPLETE:
2766             /* nothing has to be done */
2767             break;
2768
2769         case SAVE_POINTERS:
2770             /*
2771              * SAVE POINTER may be ignored as we have the struct
2772              * ScsiReqBlk* associated with the scsi command.
2773              */
2774             dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2775                 "SAVE POINTER rem=%i Ignore\n",
2776                 srb->cmd, srb->total_xfer_length);
2777             break;
2778
2779         case RESTORE_POINTERS:
2780             dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2781             break;
2782
2783         case ABORT:
2784             dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2785                 "<%02i-%i> ABORT msg\n",
2786                 srb->cmd, dcb->target_id,
2787                 dcb->target_lun);
2788             dcb->flag |= ABORT_DEV_;
2789             enable_msgout_abort(acb, srb);
2790             break;
2791
2792         default:
2793             /* reject unknown messages */
2794             if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2795                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2796                 srb->msg_count = 1;
2797                 srb->msgout_buf[0] = dcb->identify_msg;
2798                 DC395x_ENABLE_MSGOUT;
2799                 srb->state |= SRB_MSGOUT;
2800                 /*break; */
2801             }
2802             msgin_reject(acb, srb);
2803         }
2804
2805         /* Clear counter and MsgIn state */
2806         srb->state &= ~SRB_MSGIN;
2807         acb->msg_len = 0;
2808     }
2809     *pscsi_status = PH_BUS_FREE;
2810     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important ... you know! */
2811     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2812 }
2813
2814
2815 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2816         u16 *pscsi_status)
2817 {
2818     dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2819     clear_fifo(acb, "msgin_phase1");
2820     DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2821     if (!(srb->state & SRB_MSGIN)) {
2822         srb->state &= ~SRB_DISCONNECT;
2823         srb->state |= SRB_MSGIN;
2824     }
2825     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2826     /* SCSI command */
2827     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2828 }
2829
2830
2831 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2832         u16 *pscsi_status)
2833 {
2834 }
2835
2836
2837 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2838         u16 *pscsi_status)
2839 {
2840 }
2841
2842
2843 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2844 {
2845     struct DeviceCtlBlk *i;
2846
2847     /* set all lun device's  period, offset */
2848     if (dcb->identify_msg & 0x07)
2849         return;
2850
2851     if (acb->scan_devices) {
2852         current_sync_offset = dcb->sync_offset;
2853         return;
2854     }
2855
2856     list_for_each_entry(i, &acb->dcb_list, list)
2857         if (i->target_id == dcb->target_id) {
2858             i->sync_period = dcb->sync_period;
2859             i->sync_offset = dcb->sync_offset;
2860             i->sync_mode = dcb->sync_mode;
2861             i->min_nego_period = dcb->min_nego_period;
2862         }
2863 }
2864
2865
2866 static void disconnect(struct AdapterCtlBlk *acb)
2867 {
2868     struct DeviceCtlBlk *dcb = acb->active_dcb;
2869     struct ScsiReqBlk *srb;
2870
2871     if (!dcb) {
2872         dprintkl(KERN_ERR, "disconnect: No such device\n");
2873         udelay(500);
2874         /* Suspend queue for a while */
2875         acb->last_reset =
2876             jiffies + HZ / 2 +
2877             HZ * acb->eeprom.delay_time;
2878         clear_fifo(acb, "disconnectEx");
2879         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2880         return;
2881     }
2882     srb = dcb->active_srb;
2883     acb->active_dcb = NULL;
2884     dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2885
2886     srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
2887     clear_fifo(acb, "disconnect");
2888     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2889     if (srb->state & SRB_UNEXPECT_RESEL) {
2890         dprintkl(KERN_ERR,
2891             "disconnect: Unexpected reselection <%02i-%i>\n",
2892             dcb->target_id, dcb->target_lun);
2893         srb->state = 0;
2894         waiting_process_next(acb);
2895     } else if (srb->state & SRB_ABORT_SENT) {
2896         dcb->flag &= ~ABORT_DEV_;
2897         acb->last_reset = jiffies + HZ / 2 + 1;
2898         dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2899         doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2900         waiting_process_next(acb);
2901     } else {
2902         if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2903             || !(srb->
2904              state & (SRB_DISCONNECT | SRB_COMPLETED))) {
2905             /*
2906              * Selection time out
2907              * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2908              */
2909             /* Unexp. Disc / Sel Timeout */
2910             if (srb->state != SRB_START_
2911                 && srb->state != SRB_MSGOUT) {
2912                 srb->state = SRB_READY;
2913                 dprintkl(KERN_DEBUG,
2914                     "disconnect: (0x%p) Unexpected\n",
2915                     srb->cmd);
2916                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2917                 goto disc1;
2918             } else {
2919                 /* Normal selection timeout */
2920                 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2921                     "<%02i-%i> SelTO\n", srb->cmd,
2922                     dcb->target_id, dcb->target_lun);
2923                 if (srb->retry_count++ > DC395x_MAX_RETRIES
2924                     || acb->scan_devices) {
2925                     srb->target_status =
2926                         SCSI_STAT_SEL_TIMEOUT;
2927                     goto disc1;
2928                 }
2929                 free_tag(dcb, srb);
2930                 list_move(&srb->list, &dcb->srb_waiting_list);
2931                 dprintkdbg(DBG_KG,
2932                     "disconnect: (0x%p) Retry\n",
2933                     srb->cmd);
2934                 waiting_set_timer(acb, HZ / 20);
2935             }
2936         } else if (srb->state & SRB_DISCONNECT) {
2937             u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2938             /*
2939              * SRB_DISCONNECT (This is what we expect!)
2940              */
2941             if (bval & 0x40) {
2942                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2943                     " 0x%02x: ACK set! Other controllers?\n",
2944                     bval);
2945                 /* It could come from another initiator, therefore don't do much ! */
2946             } else
2947                 waiting_process_next(acb);
2948         } else if (srb->state & SRB_COMPLETED) {
2949               disc1:
2950             /*
2951              ** SRB_COMPLETED
2952              */
2953             free_tag(dcb, srb);
2954             dcb->active_srb = NULL;
2955             srb->state = SRB_FREE;
2956             srb_done(acb, dcb, srb);
2957         }
2958     }
2959 }
2960
2961
2962 static void reselect(struct AdapterCtlBlk *acb)
2963 {
2964     struct DeviceCtlBlk *dcb = acb->active_dcb;
2965     struct ScsiReqBlk *srb = NULL;
2966     u16 rsel_tar_lun_id;
2967     u8 id, lun;
2968     dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2969
2970     clear_fifo(acb, "reselect");
2971     /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2972     /* Read Reselected Target ID and LUN */
2973     rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2974     if (dcb) {      /* Arbitration lost but Reselection win */
2975         srb = dcb->active_srb;
2976         if (!srb) {
2977             dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
2978                 "but active_srb == NULL\n");
2979             DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
2980             return;
2981         }
2982         /* Why the if ? */
2983         if (!acb->scan_devices) {
2984             dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
2985                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
2986                 srb->cmd, dcb->target_id,
2987                 dcb->target_lun, rsel_tar_lun_id,
2988                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
2989             /*srb->state |= SRB_DISCONNECT; */
2990
2991             srb->state = SRB_READY;
2992             free_tag(dcb, srb);
2993             list_move(&srb->list, &dcb->srb_waiting_list);
2994             waiting_set_timer(acb, HZ / 20);
2995
2996             /* return; */
2997         }
2998     }
2999     /* Read Reselected Target Id and LUN */
3000     if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3001         dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3002             "Got %i!\n", rsel_tar_lun_id);
3003     id = rsel_tar_lun_id & 0xff;
3004     lun = (rsel_tar_lun_id >> 8) & 7;
3005     dcb = find_dcb(acb, id, lun);
3006     if (!dcb) {
3007         dprintkl(KERN_ERR, "reselect: From non existent device "
3008             "<%02i-%i>\n", id, lun);
3009         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
3010         return;
3011     }
3012     acb->active_dcb = dcb;
3013
3014     if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3015         dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3016             "disconnection? <%02i-%i>\n",
3017             dcb->target_id, dcb->target_lun);
3018
3019     if (dcb->sync_mode & EN_TAG_QUEUEING) {
3020         srb = acb->tmp_srb;
3021         dcb->active_srb = srb;
3022     } else {
3023         /* There can be only one! */
3024         srb = dcb->active_srb;
3025         if (!srb || !(srb->state & SRB_DISCONNECT)) {
3026             /*
3027              * abort command
3028              */
3029             dprintkl(KERN_DEBUG,
3030                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3031                 dcb->target_id, dcb->target_lun);
3032             srb = acb->tmp_srb;
3033             srb->state = SRB_UNEXPECT_RESEL;
3034             dcb->active_srb = srb;
3035             enable_msgout_abort(acb, srb);
3036         } else {
3037             if (dcb->flag & ABORT_DEV_) {
3038                 /*srb->state = SRB_ABORT_SENT; */
3039                 enable_msgout_abort(acb, srb);
3040             } else
3041                 srb->state = SRB_DATA_XFER;
3042
3043         }
3044     }
3045     srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3046
3047     /* Program HA ID, target ID, period and offset */
3048     dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3049     DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host   ID */
3050     DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);        /* target ID */
3051     DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);        /* offset    */
3052     DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);      /* sync period, wide */
3053     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3054     /* SCSI command */
3055     DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3056 }
3057
3058
3059 static inline u8 tagq_blacklist(char *name)
3060 {
3061 #ifndef DC395x_NO_TAGQ
3062 #if 0
3063     u8 i;
3064     for (i = 0; i < BADDEVCNT; i++)
3065         if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3066             return 1;
3067 #endif
3068     return 0;
3069 #else
3070     return 1;
3071 #endif
3072 }
3073
3074
3075 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3076 {
3077     /* Check for SCSI format (ANSI and Response data format) */
3078     if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3079         if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3080             && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3081             /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3082             /* ((dcb->dev_type == TYPE_DISK)
3083                || (dcb->dev_type == TYPE_MOD)) && */
3084             !tagq_blacklist(((char *)ptr) + 8)) {
3085             if (dcb->max_command == 1)
3086                 dcb->max_command =
3087                     dcb->acb->tag_max_num;
3088             dcb->sync_mode |= EN_TAG_QUEUEING;
3089             /*dcb->tag_mask = 0; */
3090         } else
3091             dcb->max_command = 1;
3092     }
3093 }
3094
3095
3096 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3097         struct ScsiInqData *ptr)
3098 {
3099     u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3100     dcb->dev_type = bval1;
3101     /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3102     disc_tagq_set(dcb, ptr);
3103 }
3104
3105
3106 /* unmap mapped pci regions from SRB */
3107 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3108 {
3109     struct scsi_cmnd *cmd = srb->cmd;
3110     enum dma_data_direction dir = cmd->sc_data_direction;
3111
3112     if (scsi_sg_count(cmd) && dir != DMA_NONE) {
3113         /* unmap DC395x SG list */
3114         dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3115             srb->sg_bus_addr, SEGMENTX_LEN);
3116         dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3117                 DMA_TO_DEVICE);
3118         dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3119                scsi_sg_count(cmd), scsi_bufflen(cmd));
3120         /* unmap the sg segments */
3121         scsi_dma_unmap(cmd);
3122     }
3123 }
3124
3125
3126 /* unmap mapped pci sense buffer from SRB */
3127 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3128         struct ScsiReqBlk *srb)
3129 {
3130     if (!(srb->flag & AUTO_REQSENSE))
3131         return;
3132     /* Unmap sense buffer */
3133     dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3134            srb->segment_x[0].address);
3135     dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3136              srb->segment_x[0].length, DMA_FROM_DEVICE);
3137     /* Restore SG stuff */
3138     srb->total_xfer_length = srb->xferred;
3139     srb->segment_x[0].address =
3140         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3141     srb->segment_x[0].length =
3142         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3143 }
3144
3145
3146 /*
3147  * Complete execution of a SCSI command
3148  * Signal completion to the generic SCSI driver
3149  */
3150 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3151         struct ScsiReqBlk *srb)
3152 {
3153     u8 tempcnt, status;
3154     struct scsi_cmnd *cmd = srb->cmd;
3155     enum dma_data_direction dir = cmd->sc_data_direction;
3156     int ckc_only = 1;
3157
3158     dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3159         srb->cmd->device->id, (u8)srb->cmd->device->lun);
3160     dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3161            srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3162            scsi_sgtalbe(cmd));
3163     status = srb->target_status;
3164     set_host_byte(cmd, DID_OK);
3165     set_status_byte(cmd, SAM_STAT_GOOD);
3166     if (srb->flag & AUTO_REQSENSE) {
3167         dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3168         pci_unmap_srb_sense(acb, srb);
3169         /*
3170          ** target status..........................
3171          */
3172         srb->flag &= ~AUTO_REQSENSE;
3173         srb->adapter_status = 0;
3174         srb->target_status = SAM_STAT_CHECK_CONDITION;
3175         if (debug_enabled(DBG_1)) {
3176             switch (cmd->sense_buffer[2] & 0x0f) {
3177             case NOT_READY:
3178                 dprintkl(KERN_DEBUG,
3179                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3180                      cmd->cmnd[0], dcb->target_id,
3181                      dcb->target_lun, status, acb->scan_devices);
3182                 break;
3183             case UNIT_ATTENTION:
3184                 dprintkl(KERN_DEBUG,
3185                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3186                      cmd->cmnd[0], dcb->target_id,
3187                      dcb->target_lun, status, acb->scan_devices);
3188                 break;
3189             case ILLEGAL_REQUEST:
3190                 dprintkl(KERN_DEBUG,
3191                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3192                      cmd->cmnd[0], dcb->target_id,
3193                      dcb->target_lun, status, acb->scan_devices);
3194                 break;
3195             case MEDIUM_ERROR:
3196                 dprintkl(KERN_DEBUG,
3197                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3198                      cmd->cmnd[0], dcb->target_id,
3199                      dcb->target_lun, status, acb->scan_devices);
3200                 break;
3201             case HARDWARE_ERROR:
3202                 dprintkl(KERN_DEBUG,
3203                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3204                      cmd->cmnd[0], dcb->target_id,
3205                      dcb->target_lun, status, acb->scan_devices);
3206                 break;
3207             }
3208             if (cmd->sense_buffer[7] >= 6)
3209                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3210                     "(0x%08x 0x%08x)\n",
3211                     cmd->sense_buffer[2], cmd->sense_buffer[12],
3212                     cmd->sense_buffer[13],
3213                     *((unsigned int *)(cmd->sense_buffer + 3)),
3214                     *((unsigned int *)(cmd->sense_buffer + 8)));
3215             else
3216                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3217                     cmd->sense_buffer[2],
3218                     *((unsigned int *)(cmd->sense_buffer + 3)));
3219         }
3220
3221         if (status == SAM_STAT_CHECK_CONDITION) {
3222             set_host_byte(cmd, DID_BAD_TARGET);
3223             goto ckc_e;
3224         }
3225         dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3226
3227         set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
3228
3229         goto ckc_e;
3230     }
3231
3232 /*************************************************************/
3233     if (status) {
3234         /*
3235          * target status..........................
3236          */
3237         if (status == SAM_STAT_CHECK_CONDITION) {
3238             request_sense(acb, dcb, srb);
3239             return;
3240         } else if (status == SAM_STAT_TASK_SET_FULL) {
3241             tempcnt = (u8)list_size(&dcb->srb_going_list);
3242             dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3243                  dcb->target_id, dcb->target_lun, tempcnt);
3244             if (tempcnt > 1)
3245                 tempcnt--;
3246             dcb->max_command = tempcnt;
3247             free_tag(dcb, srb);
3248             list_move(&srb->list, &dcb->srb_waiting_list);
3249             waiting_set_timer(acb, HZ / 20);
3250             srb->adapter_status = 0;
3251             srb->target_status = 0;
3252             return;
3253         } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3254             srb->adapter_status = H_SEL_TIMEOUT;
3255             srb->target_status = 0;
3256             set_host_byte(cmd, DID_NO_CONNECT);
3257         } else {
3258             srb->adapter_status = 0;
3259             set_host_byte(cmd, DID_ERROR);
3260             set_status_byte(cmd, status);
3261         }
3262     } else {
3263         /*
3264          ** process initiator status..........................
3265          */
3266         status = srb->adapter_status;
3267         if (status & H_OVER_UNDER_RUN) {
3268             srb->target_status = 0;
3269             scsi_msg_to_host_byte(cmd, srb->end_message);
3270         } else if (srb->status & PARITY_ERROR) {
3271             set_host_byte(cmd, DID_PARITY);
3272         } else {    /* No error */
3273
3274             srb->adapter_status = 0;
3275             srb->target_status = 0;
3276         }
3277     }
3278
3279     ckc_only = 0;
3280 /* Check Error Conditions */
3281       ckc_e:
3282
3283     pci_unmap_srb(acb, srb);
3284
3285     if (cmd->cmnd[0] == INQUIRY) {
3286         unsigned char *base = NULL;
3287         struct ScsiInqData *ptr;
3288         unsigned long flags = 0;
3289         struct scatterlist* sg = scsi_sglist(cmd);
3290         size_t offset = 0, len = sizeof(struct ScsiInqData);
3291
3292         local_irq_save(flags);
3293         base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3294         ptr = (struct ScsiInqData *)(base + offset);
3295
3296         if (!ckc_only && get_host_byte(cmd) == DID_OK
3297             && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3298             && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3299             dcb->inquiry7 = ptr->Flags;
3300
3301     /*if( srb->cmd->cmnd[0] == INQUIRY && */
3302     /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3303         if ((get_host_byte(cmd) == DID_OK) ||
3304             (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) {
3305             if (!dcb->init_tcq_flag) {
3306                 add_dev(acb, dcb, ptr);
3307                 dcb->init_tcq_flag = 1;
3308             }
3309         }
3310
3311         scsi_kunmap_atomic_sg(base);
3312         local_irq_restore(flags);
3313     }
3314
3315     /* Here is the info for Doug Gilbert's sg3 ... */
3316     scsi_set_resid(cmd, srb->total_xfer_length);
3317     if (debug_enabled(DBG_KG)) {
3318         if (srb->total_xfer_length)
3319             dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3320                 "cmnd=0x%02x Missed %i bytes\n",
3321                 cmd, cmd->device->id, (u8)cmd->device->lun,
3322                 cmd->cmnd[0], srb->total_xfer_length);
3323     }
3324
3325     if (srb != acb->tmp_srb) {
3326         /* Add to free list */
3327         dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3328                cmd, cmd->result);
3329         list_move_tail(&srb->list, &acb->srb_free_list);
3330     } else {
3331         dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3332     }
3333
3334     scsi_done(cmd);
3335     waiting_process_next(acb);
3336 }
3337
3338
3339 /* abort all cmds in our queues */
3340 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3341         struct scsi_cmnd *cmd, u8 force)
3342 {
3343     struct DeviceCtlBlk *dcb;
3344     dprintkl(KERN_INFO, "doing_srb_done: pids ");
3345
3346     list_for_each_entry(dcb, &acb->dcb_list, list) {
3347         struct ScsiReqBlk *srb;
3348         struct ScsiReqBlk *tmp;
3349         struct scsi_cmnd *p;
3350
3351         list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3352             p = srb->cmd;
3353             printk("G:%p(%02i-%i) ", p,
3354                    p->device->id, (u8)p->device->lun);
3355             list_del(&srb->list);
3356             free_tag(dcb, srb);
3357             list_add_tail(&srb->list, &acb->srb_free_list);
3358             set_host_byte(p, did_flag);
3359             set_status_byte(p, SAM_STAT_GOOD);
3360             pci_unmap_srb_sense(acb, srb);
3361             pci_unmap_srb(acb, srb);
3362             if (force) {
3363                 /* For new EH, we normally don't need to give commands back,
3364                  * as they all complete or all time out */
3365                 scsi_done(p);
3366             }
3367         }
3368         if (!list_empty(&dcb->srb_going_list))
3369             dprintkl(KERN_DEBUG,
3370                    "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3371                    dcb->target_id, dcb->target_lun);
3372         if (dcb->tag_mask)
3373             dprintkl(KERN_DEBUG,
3374                    "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3375                    dcb->target_id, dcb->target_lun,
3376                    dcb->tag_mask);
3377
3378         /* Waiting queue */
3379         list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3380             p = srb->cmd;
3381
3382             printk("W:%p<%02i-%i>", p, p->device->id,
3383                    (u8)p->device->lun);
3384             list_move_tail(&srb->list, &acb->srb_free_list);
3385             set_host_byte(p, did_flag);
3386             set_status_byte(p, SAM_STAT_GOOD);
3387             pci_unmap_srb_sense(acb, srb);
3388             pci_unmap_srb(acb, srb);
3389             if (force) {
3390                 /* For new EH, we normally don't need to give commands back,
3391                  * as they all complete or all time out */
3392                 scsi_done(cmd);
3393             }
3394         }
3395         if (!list_empty(&dcb->srb_waiting_list))
3396             dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3397                  list_size(&dcb->srb_waiting_list), dcb->target_id,
3398                  dcb->target_lun);
3399         dcb->flag &= ~ABORT_DEV_;
3400     }
3401     printk("\n");
3402 }
3403
3404
3405 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3406 {
3407     dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3408     acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3409     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3410
3411     while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3412         /* nothing */;
3413 }
3414
3415
3416 static void set_basic_config(struct AdapterCtlBlk *acb)
3417 {
3418     u8 bval;
3419     u16 wval;
3420     DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3421     if (acb->config & HCC_PARITY)
3422         bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3423     else
3424         bval = PHASELATCH | INITIATOR | BLOCKRST;
3425
3426     DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3427
3428     /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3429     DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);   /* was 0x13: default */
3430     /* program Host ID                  */
3431     DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3432     /* set ansynchronous transfer       */
3433     DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3434     /* Turn LED control off */
3435     wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3436     DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3437     /* DMA config          */
3438     wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3439     wval |=
3440         DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3441     DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3442     /* Clear pending interrupt status */
3443     DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3444     /* Enable SCSI interrupt    */
3445     DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3446     DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3447               /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3448               );
3449 }
3450
3451
3452 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3453 {
3454     dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3455     /* delay half a second */
3456     if (timer_pending(&acb->waiting_timer))
3457         del_timer(&acb->waiting_timer);
3458
3459     DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3460     DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3461     /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3462     udelay(500);
3463     /* Maybe we locked up the bus? Then lets wait even longer ... */
3464     acb->last_reset =
3465         jiffies + 5 * HZ / 2 +
3466         HZ * acb->eeprom.delay_time;
3467
3468     clear_fifo(acb, "scsi_reset_detect");
3469     set_basic_config(acb);
3470     /*1.25 */
3471     /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3472
3473     if (acb->acb_flag & RESET_DEV) {    /* RESET_DETECT, RESET_DONE, RESET_DEV */
3474         acb->acb_flag |= RESET_DONE;
3475     } else {
3476         acb->acb_flag |= RESET_DETECT;
3477         reset_dev_param(acb);
3478         doing_srb_done(acb, DID_RESET, NULL, 1);
3479         /*DC395x_RecoverSRB( acb ); */
3480         acb->active_dcb = NULL;
3481         acb->acb_flag = 0;
3482         waiting_process_next(acb);
3483     }
3484 }
3485
3486
3487 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3488         struct ScsiReqBlk *srb)
3489 {
3490     struct scsi_cmnd *cmd = srb->cmd;
3491     dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3492         cmd, cmd->device->id, (u8)cmd->device->lun);
3493
3494     srb->flag |= AUTO_REQSENSE;
3495     srb->adapter_status = 0;
3496     srb->target_status = 0;
3497
3498     /* KG: Can this prevent crap sense data ? */
3499     memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3500
3501     /* Save some data */
3502     srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3503         srb->segment_x[0].address;
3504     srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3505         srb->segment_x[0].length;
3506     srb->xferred = srb->total_xfer_length;
3507     /* srb->segment_x : a one entry of S/G list table */
3508     srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3509     srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3510     /* Map sense buffer */
3511     srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3512             cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3513             DMA_FROM_DEVICE);
3514     dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3515            cmd->sense_buffer, srb->segment_x[0].address,
3516            SCSI_SENSE_BUFFERSIZE);
3517     srb->sg_count = 1;
3518     srb->sg_index = 0;
3519
3520     if (start_scsi(acb, dcb, srb)) {    /* Should only happen, if sb. else grabs the bus */
3521         dprintkl(KERN_DEBUG,
3522             "request_sense: (0x%p) failed <%02i-%i>\n",
3523             srb->cmd, dcb->target_id, dcb->target_lun);
3524         list_move(&srb->list, &dcb->srb_waiting_list);
3525         waiting_set_timer(acb, HZ / 100);
3526     }
3527 }
3528
3529
3530 /**
3531  * device_alloc - Allocate a new device instance. This create the
3532  * devices instance and sets up all the data items. The adapter
3533  * instance is required to obtain confiuration information for this
3534  * device. This does *not* add this device to the adapters device
3535  * list.
3536  *
3537  * @acb: The adapter to obtain configuration information from.
3538  * @target: The target for the new device.
3539  * @lun: The lun for the new device.
3540  *
3541  * Return the new device if successful or NULL on failure.
3542  **/
3543 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3544         u8 target, u8 lun)
3545 {
3546     struct NvRamType *eeprom = &acb->eeprom;
3547     u8 period_index = eeprom->target[target].period & 0x07;
3548     struct DeviceCtlBlk *dcb;
3549
3550     dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3551     dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3552     if (!dcb)
3553         return NULL;
3554     dcb->acb = NULL;
3555     INIT_LIST_HEAD(&dcb->srb_going_list);
3556     INIT_LIST_HEAD(&dcb->srb_waiting_list);
3557     dcb->active_srb = NULL;
3558     dcb->tag_mask = 0;
3559     dcb->max_command = 1;
3560     dcb->target_id = target;
3561     dcb->target_lun = lun;
3562     dcb->dev_mode = eeprom->target[target].cfg0;
3563 #ifndef DC395x_NO_DISCONNECT
3564     dcb->identify_msg =
3565         IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3566 #else
3567     dcb->identify_msg = IDENTIFY(0, lun);
3568 #endif
3569     dcb->inquiry7 = 0;
3570     dcb->sync_mode = 0;
3571     dcb->min_nego_period = clock_period[period_index];
3572     dcb->sync_period = 0;
3573     dcb->sync_offset = 0;
3574     dcb->flag = 0;
3575
3576 #ifndef DC395x_NO_WIDE
3577     if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3578         && (acb->config & HCC_WIDE_CARD))
3579         dcb->sync_mode |= WIDE_NEGO_ENABLE;
3580 #endif
3581 #ifndef DC395x_NO_SYNC
3582     if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3583         if (!(lun) || current_sync_offset)
3584             dcb->sync_mode |= SYNC_NEGO_ENABLE;
3585 #endif
3586     if (dcb->target_lun != 0) {
3587         /* Copy settings */
3588         struct DeviceCtlBlk *p = NULL, *iter;
3589
3590         list_for_each_entry(iter, &acb->dcb_list, list)
3591             if (iter->target_id == dcb->target_id) {
3592                 p = iter;
3593                 break;
3594             }
3595
3596         if (!p) {
3597             kfree(dcb);
3598             return NULL;
3599         }
3600
3601         dprintkdbg(DBG_1,
3602                "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3603                dcb->target_id, dcb->target_lun,
3604                p->target_id, p->target_lun);
3605         dcb->sync_mode = p->sync_mode;
3606         dcb->sync_period = p->sync_period;
3607         dcb->min_nego_period = p->min_nego_period;
3608         dcb->sync_offset = p->sync_offset;
3609         dcb->inquiry7 = p->inquiry7;
3610     }
3611     return dcb;
3612 }
3613
3614
3615 /**
3616  * adapter_add_device - Adds the device instance to the adaptor instance.
3617  *
3618  * @acb: The adapter device to be updated
3619  * @dcb: A newly created and initialised device instance to add.
3620  **/
3621 static void adapter_add_device(struct AdapterCtlBlk *acb,
3622         struct DeviceCtlBlk *dcb)
3623 {
3624     /* backpointer to adapter */
3625     dcb->acb = acb;
3626
3627     /* set run_robin to this device if it is currently empty */
3628     if (list_empty(&acb->dcb_list))
3629         acb->dcb_run_robin = dcb;
3630
3631     /* add device to list */
3632     list_add_tail(&dcb->list, &acb->dcb_list);
3633
3634     /* update device maps */
3635     acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3636     acb->children[dcb->target_id][dcb->target_lun] = dcb;
3637 }
3638
3639
3640 /**
3641  * adapter_remove_device - Removes the device instance from the adaptor
3642  * instance. The device instance is not check in any way or freed by this.
3643  * The caller is expected to take care of that. This will simply remove the
3644  * device from the adapters data strcutures.
3645  *
3646  * @acb: The adapter device to be updated
3647  * @dcb: A device that has previously been added to the adapter.
3648  **/
3649 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3650         struct DeviceCtlBlk *dcb)
3651 {
3652     struct DeviceCtlBlk *i;
3653     struct DeviceCtlBlk *tmp;
3654     dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3655         dcb->target_id, dcb->target_lun);
3656
3657     /* fix up any pointers to this device that we have in the adapter */
3658     if (acb->active_dcb == dcb)
3659         acb->active_dcb = NULL;
3660     if (acb->dcb_run_robin == dcb)
3661         acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3662
3663     /* unlink from list */
3664     list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3665         if (dcb == i) {
3666             list_del(&i->list);
3667             break;
3668         }
3669
3670     /* clear map and children */
3671     acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3672     acb->children[dcb->target_id][dcb->target_lun] = NULL;
3673     dcb->acb = NULL;
3674 }
3675
3676
3677 /**
3678  * adapter_remove_and_free_device - Removes a single device from the adapter
3679  * and then frees the device information.
3680  *
3681  * @acb: The adapter device to be updated
3682  * @dcb: A device that has previously been added to the adapter.
3683  */
3684 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3685         struct DeviceCtlBlk *dcb)
3686 {
3687     if (list_size(&dcb->srb_going_list) > 1) {
3688         dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3689                    "Won't remove because of %i active requests.\n",
3690                dcb->target_id, dcb->target_lun,
3691                list_size(&dcb->srb_going_list));
3692         return;
3693     }
3694     adapter_remove_device(acb, dcb);
3695     kfree(dcb);
3696 }
3697
3698
3699 /**
3700  * adapter_remove_and_free_all_devices - Removes and frees all of the
3701  * devices associated with the specified adapter.
3702  *
3703  * @acb: The adapter from which all devices should be removed.
3704  **/
3705 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3706 {
3707     struct DeviceCtlBlk *dcb;
3708     struct DeviceCtlBlk *tmp;
3709     dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3710            list_size(&acb->dcb_list));
3711
3712     list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3713         adapter_remove_and_free_device(acb, dcb);
3714 }
3715
3716
3717 /**
3718  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3719  * scsi device that we need to deal with. We allocate a new device and then
3720  * insert that device into the adapters device list.
3721  *
3722  * @scsi_device: The new scsi device that we need to handle.
3723  **/
3724 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3725 {
3726     struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3727     struct DeviceCtlBlk *dcb;
3728
3729     dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3730     if (!dcb)
3731         return -ENOMEM;
3732     adapter_add_device(acb, dcb);
3733
3734     return 0;
3735 }
3736
3737
3738 /**
3739  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3740  * device that is going away.
3741  *
3742  * @scsi_device: The new scsi device that we need to handle.
3743  **/
3744 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3745 {
3746     struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3747     struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3748     if (dcb)
3749         adapter_remove_and_free_device(acb, dcb);
3750 }
3751
3752
3753
3754
3755 /**
3756  * trms1040_wait_30us: wait for 30 us
3757  *
3758  * Waits for 30us (using the chip by the looks of it..)
3759  *
3760  * @io_port: base I/O address
3761  **/
3762 static void trms1040_wait_30us(unsigned long io_port)
3763 {
3764     /* ScsiPortStallExecution(30); wait 30 us */
3765     outb(5, io_port + TRM_S1040_GEN_TIMER);
3766     while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3767         /* nothing */ ;
3768 }
3769
3770
3771 /**
3772  * trms1040_write_cmd - write the secified command and address to
3773  * chip
3774  *
3775  * @io_port:    base I/O address
3776  * @cmd:    SB + op code (command) to send
3777  * @addr:   address to send
3778  **/
3779 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3780 {
3781     int i;
3782     u8 send_data;
3783
3784     /* program SB + OP code */
3785     for (i = 0; i < 3; i++, cmd <<= 1) {
3786         send_data = NVR_SELECT;
3787         if (cmd & 0x04) /* Start from bit 2 */
3788             send_data |= NVR_BITOUT;
3789
3790         outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3791         trms1040_wait_30us(io_port);
3792         outb((send_data | NVR_CLOCK),
3793              io_port + TRM_S1040_GEN_NVRAM);
3794         trms1040_wait_30us(io_port);
3795     }
3796
3797     /* send address */
3798     for (i = 0; i < 7; i++, addr <<= 1) {
3799         send_data = NVR_SELECT;
3800         if (addr & 0x40)    /* Start from bit 6 */
3801             send_data |= NVR_BITOUT;
3802
3803         outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3804         trms1040_wait_30us(io_port);
3805         outb((send_data | NVR_CLOCK),
3806              io_port + TRM_S1040_GEN_NVRAM);
3807         trms1040_wait_30us(io_port);
3808     }
3809     outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3810     trms1040_wait_30us(io_port);
3811 }
3812
3813
3814 /**
3815  * trms1040_set_data - store a single byte in the eeprom
3816  *
3817  * Called from write all to write a single byte into the SSEEPROM
3818  * Which is done one bit at a time.
3819  *
3820  * @io_port:    base I/O address
3821  * @addr:   offset into EEPROM
3822  * @byte:   bytes to write
3823  **/
3824 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3825 {
3826     int i;
3827     u8 send_data;
3828
3829     /* Send write command & address */
3830     trms1040_write_cmd(io_port, 0x05, addr);
3831
3832     /* Write data */
3833     for (i = 0; i < 8; i++, byte <<= 1) {
3834         send_data = NVR_SELECT;
3835         if (byte & 0x80)    /* Start from bit 7 */
3836             send_data |= NVR_BITOUT;
3837
3838         outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3839         trms1040_wait_30us(io_port);
3840         outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3841         trms1040_wait_30us(io_port);
3842     }
3843     outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3844     trms1040_wait_30us(io_port);
3845
3846     /* Disable chip select */
3847     outb(0, io_port + TRM_S1040_GEN_NVRAM);
3848     trms1040_wait_30us(io_port);
3849
3850     outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3851     trms1040_wait_30us(io_port);
3852
3853     /* Wait for write ready */
3854     while (1) {
3855         outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3856         trms1040_wait_30us(io_port);
3857
3858         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3859         trms1040_wait_30us(io_port);
3860
3861         if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3862             break;
3863     }
3864
3865     /*  Disable chip select */
3866     outb(0, io_port + TRM_S1040_GEN_NVRAM);
3867 }
3868
3869
3870 /**
3871  * trms1040_write_all - write 128 bytes to the eeprom
3872  *
3873  * Write the supplied 128 bytes to the chips SEEPROM
3874  *
3875  * @eeprom: the data to write
3876  * @io_port:    the base io port
3877  **/
3878 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3879 {
3880     u8 *b_eeprom = (u8 *)eeprom;
3881     u8 addr;
3882
3883     /* Enable SEEPROM */
3884     outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3885          io_port + TRM_S1040_GEN_CONTROL);
3886
3887     /* write enable */
3888     trms1040_write_cmd(io_port, 0x04, 0xFF);
3889     outb(0, io_port + TRM_S1040_GEN_NVRAM);
3890     trms1040_wait_30us(io_port);
3891
3892     /* write */
3893     for (addr = 0; addr < 128; addr++, b_eeprom++)
3894         trms1040_set_data(io_port, addr, *b_eeprom);
3895
3896     /* write disable */
3897     trms1040_write_cmd(io_port, 0x04, 0x00);
3898     outb(0, io_port + TRM_S1040_GEN_NVRAM);
3899     trms1040_wait_30us(io_port);
3900
3901     /* Disable SEEPROM */
3902     outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3903          io_port + TRM_S1040_GEN_CONTROL);
3904 }
3905
3906
3907 /**
3908  * trms1040_get_data - get a single byte from the eeprom
3909  *
3910  * Called from read all to read a single byte into the SSEEPROM
3911  * Which is done one bit at a time.
3912  *
3913  * @io_port:    base I/O address
3914  * @addr:   offset into SEEPROM
3915  *
3916  * Returns the byte read.
3917  **/
3918 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3919 {
3920     int i;
3921     u8 read_byte;
3922     u8 result = 0;
3923
3924     /* Send read command & address */
3925     trms1040_write_cmd(io_port, 0x06, addr);
3926
3927     /* read data */
3928     for (i = 0; i < 8; i++) {
3929         outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3930         trms1040_wait_30us(io_port);
3931         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3932
3933         /* Get data bit while falling edge */
3934         read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3935         result <<= 1;
3936         if (read_byte & NVR_BITIN)
3937             result |= 1;
3938
3939         trms1040_wait_30us(io_port);
3940     }
3941
3942     /* Disable chip select */
3943     outb(0, io_port + TRM_S1040_GEN_NVRAM);
3944     return result;
3945 }
3946
3947
3948 /**
3949  * trms1040_read_all - read all bytes from the eeprom
3950  *
3951  * Read the 128 bytes from the SEEPROM.
3952  *
3953  * @eeprom: where to store the data
3954  * @io_port:    the base io port
3955  **/
3956 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
3957 {
3958     u8 *b_eeprom = (u8 *)eeprom;
3959     u8 addr;
3960
3961     /* Enable SEEPROM */
3962     outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3963          io_port + TRM_S1040_GEN_CONTROL);
3964
3965     /* read details */
3966     for (addr = 0; addr < 128; addr++, b_eeprom++)
3967         *b_eeprom = trms1040_get_data(io_port, addr);
3968
3969     /* Disable SEEPROM */
3970     outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3971          io_port + TRM_S1040_GEN_CONTROL);
3972 }
3973
3974
3975
3976 /**
3977  * check_eeprom - get and check contents of the eeprom
3978  *
3979  * Read seeprom 128 bytes into the memory provider in eeprom.
3980  * Checks the checksum and if it's not correct it uses a set of default
3981  * values.
3982  *
3983  * @eeprom: caller allocated strcuture to read the eeprom data into
3984  * @io_port:    io port to read from
3985  **/
3986 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
3987 {
3988     u16 *w_eeprom = (u16 *)eeprom;
3989     u16 w_addr;
3990     u16 cksum;
3991     u32 d_addr;
3992     u32 *d_eeprom;
3993
3994     trms1040_read_all(eeprom, io_port); /* read eeprom */
3995
3996     cksum = 0;
3997     for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
3998          w_addr++, w_eeprom++)
3999         cksum += *w_eeprom;
4000     if (cksum != 0x1234) {
4001         /*
4002          * Checksum is wrong.
4003          * Load a set of defaults into the eeprom buffer
4004          */
4005         dprintkl(KERN_WARNING,
4006             "EEProm checksum error: using default values and options.\n");
4007         eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4008         eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4009         eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4010         eeprom->sub_sys_id[1] =
4011             (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4012         eeprom->sub_class = 0x00;
4013         eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4014         eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4015         eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4016         eeprom->device_id[1] =
4017             (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4018         eeprom->reserved = 0x00;
4019
4020         for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4021              d_addr < 16; d_addr++, d_eeprom++)
4022             *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4023
4024         *d_eeprom++ = 0x04000F07;   /* max_tag,delay_time,channel_cfg,scsi_id */
4025         *d_eeprom++ = 0x00000015;   /* reserved1,boot_lun,boot_target,reserved0 */
4026         for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4027             *d_eeprom = 0x00;
4028
4029         /* Now load defaults (maybe set by boot/module params) */
4030         set_safe_settings();
4031         fix_settings();
4032         eeprom_override(eeprom);
4033
4034         eeprom->cksum = 0x00;
4035         for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4036              w_addr < 63; w_addr++, w_eeprom++)
4037             cksum += *w_eeprom;
4038
4039         *w_eeprom = 0x1234 - cksum;
4040         trms1040_write_all(eeprom, io_port);
4041         eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4042     } else {
4043         set_safe_settings();
4044         eeprom_index_to_delay(eeprom);
4045         eeprom_override(eeprom);
4046     }
4047 }
4048
4049
4050 /**
4051  * print_eeprom_settings - output the eeprom settings
4052  * to the kernel log so people can see what they were.
4053  *
4054  * @eeprom: The eeprom data strucutre to show details for.
4055  **/
4056 static void print_eeprom_settings(struct NvRamType *eeprom)
4057 {
4058     dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4059         eeprom->scsi_id,
4060         eeprom->target[0].period,
4061         clock_speed[eeprom->target[0].period] / 10,
4062         clock_speed[eeprom->target[0].period] % 10,
4063         eeprom->target[0].cfg0);
4064     dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4065         eeprom->channel_cfg, eeprom->max_tag,
4066         1 << eeprom->max_tag, eeprom->delay_time);
4067 }
4068
4069
4070 /* Free SG tables */
4071 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4072 {
4073     int i;
4074     const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4075
4076     for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4077         kfree(acb->srb_array[i].segment_x);
4078 }
4079
4080
4081 /*
4082  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4083  * should never cross a page boundary */
4084 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4085 {
4086     const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4087                                 *SEGMENTX_LEN;
4088     int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4089     const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4090     int srb_idx = 0;
4091     unsigned i = 0;
4092     struct SGentry *ptr;
4093
4094     for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4095         acb->srb_array[i].segment_x = NULL;
4096
4097     dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4098     while (pages--) {
4099         ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4100         if (!ptr) {
4101             adapter_sg_tables_free(acb);
4102             return 1;
4103         }
4104         dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4105             PAGE_SIZE, ptr, srb_idx);
4106         i = 0;
4107         while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4108             acb->srb_array[srb_idx++].segment_x =
4109                 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4110     }
4111     if (i < srbs_per_page)
4112         acb->srb.segment_x =
4113             ptr + (i * DC395x_MAX_SG_LISTENTRY);
4114     else
4115         dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4116     return 0;
4117 }
4118
4119
4120
4121 /**
4122  * adapter_print_config - print adapter connection and termination
4123  * config
4124  *
4125  * The io port in the adapter needs to have been set before calling
4126  * this function.
4127  *
4128  * @acb: The adapter to print the information for.
4129  **/
4130 static void adapter_print_config(struct AdapterCtlBlk *acb)
4131 {
4132     u8 bval;
4133
4134     bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4135     dprintkl(KERN_INFO, "%sConnectors: ",
4136         ((bval & WIDESCSI) ? "(Wide) " : ""));
4137     if (!(bval & CON5068))
4138         printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4139     if (!(bval & CON68))
4140         printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4141     if (!(bval & CON50))
4142         printk("int50 ");
4143     if ((bval & (CON5068 | CON50 | CON68)) ==
4144         0 /*(CON5068 | CON50 | CON68) */ )
4145         printk(" Oops! (All 3?) ");
4146     bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4147     printk(" Termination: ");
4148     if (bval & DIS_TERM)
4149         printk("Disabled\n");
4150     else {
4151         if (bval & AUTOTERM)
4152             printk("Auto ");
4153         if (bval & LOW8TERM)
4154             printk("Low ");
4155         if (bval & UP8TERM)
4156             printk("High ");
4157         printk("\n");
4158     }
4159 }
4160
4161
4162 /**
4163  * adapter_init_params - Initialize the various parameters in the
4164  * adapter structure. Note that the pointer to the scsi_host is set
4165  * early (when this instance is created) and the io_port and irq
4166  * values are set later after they have been reserved. This just gets
4167  * everything set to a good starting position.
4168  *
4169  * The eeprom structure in the adapter needs to have been set before
4170  * calling this function.
4171  *
4172  * @acb: The adapter to initialize.
4173  **/
4174 static void adapter_init_params(struct AdapterCtlBlk *acb)
4175 {
4176     struct NvRamType *eeprom = &acb->eeprom;
4177     int i;
4178
4179     /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4180     /* NOTE: acb->io_port_base is set at port registration time */
4181     /* NOTE: acb->io_port_len is set at port registration time */
4182
4183     INIT_LIST_HEAD(&acb->dcb_list);
4184     acb->dcb_run_robin = NULL;
4185     acb->active_dcb = NULL;
4186
4187     INIT_LIST_HEAD(&acb->srb_free_list);
4188     /*  temp SRB for Q tag used or abort command used  */
4189     acb->tmp_srb = &acb->srb;
4190     timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4191     timer_setup(&acb->selto_timer, NULL, 0);
4192
4193     acb->srb_count = DC395x_MAX_SRB_CNT;
4194
4195     acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4196     /* NOTE: acb->irq_level is set at IRQ registration time */
4197
4198     acb->tag_max_num = 1 << eeprom->max_tag;
4199     if (acb->tag_max_num > 30)
4200         acb->tag_max_num = 30;
4201
4202     acb->acb_flag = 0;  /* RESET_DETECT, RESET_DONE, RESET_DEV */
4203     acb->gmode2 = eeprom->channel_cfg;
4204     acb->config = 0;    /* NOTE: actually set in adapter_init_chip */
4205
4206     if (eeprom->channel_cfg & NAC_SCANLUN)
4207         acb->lun_chk = 1;
4208     acb->scan_devices = 1;
4209
4210     acb->scsi_host->this_id = eeprom->scsi_id;
4211     acb->hostid_bit = (1 << acb->scsi_host->this_id);
4212
4213     for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4214         acb->dcb_map[i] = 0;
4215
4216     acb->msg_len = 0;
4217
4218     /* link static array of srbs into the srb free list */
4219     for (i = 0; i < acb->srb_count - 1; i++)
4220         list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4221 }
4222
4223
4224 /**
4225  * adapter_init_scsi_host - Initialize the scsi host instance based on
4226  * values that we have already stored in the adapter instance. There's
4227  * some mention that a lot of these are deprecated, so we won't use
4228  * them (we'll use the ones in the adapter instance) but we'll fill
4229  * them in in case something else needs them.
4230  *
4231  * The eeprom structure, irq and io ports in the adapter need to have
4232  * been set before calling this function.
4233  *
4234  * @host: The scsi host instance to fill in the values for.
4235  **/
4236 static void adapter_init_scsi_host(struct Scsi_Host *host)
4237 {
4238         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4239     struct NvRamType *eeprom = &acb->eeprom;
4240
4241     host->max_cmd_len = 24;
4242     host->can_queue = DC395x_MAX_CMD_QUEUE;
4243     host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4244     host->this_id = (int)eeprom->scsi_id;
4245     host->io_port = acb->io_port_base;
4246     host->n_io_port = acb->io_port_len;
4247     host->dma_channel = -1;
4248     host->unique_id = acb->io_port_base;
4249     host->irq = acb->irq_level;
4250     acb->last_reset = jiffies;
4251
4252     host->max_id = 16;
4253     if (host->max_id - 1 == eeprom->scsi_id)
4254         host->max_id--;
4255
4256     if (eeprom->channel_cfg & NAC_SCANLUN)
4257         host->max_lun = 8;
4258     else
4259         host->max_lun = 1;
4260 }
4261
4262
4263 /**
4264  * adapter_init_chip - Get the chip into a know state and figure out
4265  * some of the settings that apply to this adapter.
4266  *
4267  * The io port in the adapter needs to have been set before calling
4268  * this function. The config will be configured correctly on return.
4269  *
4270  * @acb: The adapter which we are to init.
4271  **/
4272 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4273 {
4274         struct NvRamType *eeprom = &acb->eeprom;
4275
4276         /* Mask all the interrupt */
4277     DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4278     DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4279
4280     /* Reset SCSI module */
4281     DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4282
4283     /* Reset PCI/DMA module */
4284     DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4285     udelay(20);
4286
4287     /* program configuration 0 */
4288     acb->config = HCC_AUTOTERM | HCC_PARITY;
4289     if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4290         acb->config |= HCC_WIDE_CARD;
4291
4292     if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4293         acb->config |= HCC_SCSI_RESET;
4294
4295     if (acb->config & HCC_SCSI_RESET) {
4296         dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4297         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4298
4299         /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4300         /*spin_unlock_irq (&io_request_lock); */
4301         udelay(500);
4302
4303         acb->last_reset =
4304             jiffies + HZ / 2 +
4305             HZ * acb->eeprom.delay_time;
4306
4307         /*spin_lock_irq (&io_request_lock); */
4308     }
4309 }
4310
4311
4312 /**
4313  * adapter_init - Grab the resource for the card, setup the adapter
4314  * information, set the card into a known state, create the various
4315  * tables etc etc. This basically gets all adapter information all up
4316  * to date, initialised and gets the chip in sync with it.
4317  *
4318  * @acb:    The adapter which we are to init.
4319  * @io_port:    The base I/O port
4320  * @io_port_len: The I/O port size
4321  * @irq:    IRQ
4322  *
4323  * Returns 0 if the initialization succeeds, any other value on
4324  * failure.
4325  **/
4326 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4327             u32 io_port_len, unsigned int irq)
4328 {
4329     if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4330         dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4331         goto failed;
4332     }
4333     /* store port base to indicate we have registered it */
4334     acb->io_port_base = io_port;
4335     acb->io_port_len = io_port_len;
4336
4337     if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4338             /* release the region we just claimed */
4339         dprintkl(KERN_INFO, "Failed to register IRQ\n");
4340         goto failed;
4341     }
4342     /* store irq to indicate we have registered it */
4343     acb->irq_level = irq;
4344
4345     /* get eeprom configuration information and command line settings etc */
4346     check_eeprom(&acb->eeprom, io_port);
4347     print_eeprom_settings(&acb->eeprom);
4348
4349     /* setup adapter control block */
4350     adapter_init_params(acb);
4351
4352     /* display card connectors/termination settings */
4353     adapter_print_config(acb);
4354
4355     if (adapter_sg_tables_alloc(acb)) {
4356         dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4357         goto failed;
4358     }
4359     adapter_init_scsi_host(acb->scsi_host);
4360     adapter_init_chip(acb);
4361     set_basic_config(acb);
4362
4363     dprintkdbg(DBG_0,
4364         "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4365         "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4366         acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4367         sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4368     return 0;
4369
4370 failed:
4371     if (acb->irq_level)
4372         free_irq(acb->irq_level, acb);
4373     if (acb->io_port_base)
4374         release_region(acb->io_port_base, acb->io_port_len);
4375     adapter_sg_tables_free(acb);
4376
4377     return 1;
4378 }
4379
4380
4381 /**
4382  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4383  * stopping all operations and disabling interrupt generation on the
4384  * card.
4385  *
4386  * @acb: The adapter which we are to shutdown.
4387  **/
4388 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4389 {
4390     /* disable interrupts */
4391     DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4392     DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4393
4394     /* reset the scsi bus */
4395     if (acb->config & HCC_SCSI_RESET)
4396         reset_scsi_bus(acb);
4397
4398     /* clear any pending interrupt state */
4399     DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4400 }
4401
4402
4403
4404 /**
4405  * adapter_uninit - Shut down the chip and release any resources that
4406  * we had allocated. Once this returns the adapter should not be used
4407  * anymore.
4408  *
4409  * @acb: The adapter which we are to un-initialize.
4410  **/
4411 static void adapter_uninit(struct AdapterCtlBlk *acb)
4412 {
4413     unsigned long flags;
4414     DC395x_LOCK_IO(acb->scsi_host, flags);
4415
4416     /* remove timers */
4417     if (timer_pending(&acb->waiting_timer))
4418         del_timer(&acb->waiting_timer);
4419     if (timer_pending(&acb->selto_timer))
4420         del_timer(&acb->selto_timer);
4421
4422     adapter_uninit_chip(acb);
4423     adapter_remove_and_free_all_devices(acb);
4424     DC395x_UNLOCK_IO(acb->scsi_host, flags);
4425
4426     if (acb->irq_level)
4427         free_irq(acb->irq_level, acb);
4428     if (acb->io_port_base)
4429         release_region(acb->io_port_base, acb->io_port_len);
4430
4431     adapter_sg_tables_free(acb);
4432 }
4433
4434
4435 #undef YESNO
4436 #define YESNO(YN) \
4437  if (YN) seq_printf(m, " Yes ");\
4438  else seq_printf(m, " No  ")
4439
4440 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4441 {
4442     struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4443     int spd, spd1;
4444     struct DeviceCtlBlk *dcb;
4445     unsigned long flags;
4446     int dev;
4447
4448     seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4449         " Driver Version " DC395X_VERSION "\n");
4450
4451     DC395x_LOCK_IO(acb->scsi_host, flags);
4452
4453     seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4454     seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4455         (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4456     seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4457     seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4458     seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4459
4460     seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4461     seq_printf(m, "AdapterID %i\n", host->this_id);
4462
4463     seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4464     /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4465     seq_printf(m, ", FilterCfg 0x%02x",
4466         DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4467     seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4468     /*seq_printf(m, "\n"); */
4469
4470     seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4471     seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);
4472     seq_printf(m, "                      %8ph\n", &acb->dcb_map[8]);
4473
4474     seq_puts(m,
4475          "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4476
4477     dev = 0;
4478     list_for_each_entry(dcb, &acb->dcb_list, list) {
4479         int nego_period;
4480         seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4481             dcb->target_lun);
4482         YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4483         YESNO(dcb->sync_offset);
4484         YESNO(dcb->sync_period & WIDE_SYNC);
4485         YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4486         YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4487         YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4488         nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4489         if (dcb->sync_offset)
4490             seq_printf(m, "  %03i ns ", nego_period);
4491         else
4492             seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4493
4494         if (dcb->sync_offset & 0x0f) {
4495             spd = 1000 / (nego_period);
4496             spd1 = 1000 % (nego_period);
4497             spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4498             seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4499                 (dcb->sync_offset & 0x0f));
4500         } else
4501             seq_puts(m, "                 ");
4502
4503         /* Add more info ... */
4504         seq_printf(m, "     %02i\n", dcb->max_command);
4505         dev++;
4506     }
4507
4508     if (timer_pending(&acb->waiting_timer))
4509         seq_puts(m, "Waiting queue timer running\n");
4510     else
4511         seq_putc(m, '\n');
4512
4513     list_for_each_entry(dcb, &acb->dcb_list, list) {
4514         struct ScsiReqBlk *srb;
4515         if (!list_empty(&dcb->srb_waiting_list))
4516             seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4517                 dcb->target_id, dcb->target_lun,
4518                 list_size(&dcb->srb_waiting_list));
4519                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4520             seq_printf(m, " %p", srb->cmd);
4521         if (!list_empty(&dcb->srb_going_list))
4522             seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4523                 dcb->target_id, dcb->target_lun,
4524                 list_size(&dcb->srb_going_list));
4525         list_for_each_entry(srb, &dcb->srb_going_list, list)
4526             seq_printf(m, " %p", srb->cmd);
4527         if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4528             seq_putc(m, '\n');
4529     }
4530
4531     if (debug_enabled(DBG_1)) {
4532         seq_printf(m, "DCB list for ACB %p:\n", acb);
4533         list_for_each_entry(dcb, &acb->dcb_list, list) {
4534             seq_printf(m, "%p -> ", dcb);
4535         }
4536         seq_puts(m, "END\n");
4537     }
4538
4539     DC395x_UNLOCK_IO(acb->scsi_host, flags);
4540     return 0;
4541 }
4542
4543
4544 static struct scsi_host_template dc395x_driver_template = {
4545     .module                 = THIS_MODULE,
4546     .proc_name              = DC395X_NAME,
4547     .show_info              = dc395x_show_info,
4548     .name                   = DC395X_BANNER " " DC395X_VERSION,
4549     .queuecommand           = dc395x_queue_command,
4550     .slave_alloc            = dc395x_slave_alloc,
4551     .slave_destroy          = dc395x_slave_destroy,
4552     .can_queue              = DC395x_MAX_CAN_QUEUE,
4553     .this_id                = 7,
4554     .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4555     .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4556     .eh_abort_handler       = dc395x_eh_abort,
4557     .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4558     .dma_boundary       = PAGE_SIZE - 1,
4559 };
4560
4561
4562 /**
4563  * banner_display - Display banner on first instance of driver
4564  * initialized.
4565  **/
4566 static void banner_display(void)
4567 {
4568     static int banner_done = 0;
4569     if (!banner_done)
4570     {
4571         dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4572         banner_done = 1;
4573     }
4574 }
4575
4576
4577 /**
4578  * dc395x_init_one - Initialise a single instance of the adapter.
4579  *
4580  * The PCI layer will call this once for each instance of the adapter
4581  * that it finds in the system. The pci_dev strcuture indicates which
4582  * instance we are being called from.
4583  *
4584  * @dev: The PCI device to initialize.
4585  * @id: Looks like a pointer to the entry in our pci device table
4586  * that was actually matched by the PCI subsystem.
4587  *
4588  * Returns 0 on success, or an error code (-ve) on failure.
4589  **/
4590 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4591 {
4592     struct Scsi_Host *scsi_host = NULL;
4593     struct AdapterCtlBlk *acb = NULL;
4594     unsigned long io_port_base;
4595     unsigned int io_port_len;
4596     unsigned int irq;
4597
4598     dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4599     banner_display();
4600
4601     if (pci_enable_device(dev))
4602     {
4603         dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4604         return -ENODEV;
4605     }
4606     io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4607     io_port_len = pci_resource_len(dev, 0);
4608     irq = dev->irq;
4609     dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4610
4611     /* allocate scsi host information (includes out adapter) */
4612     scsi_host = scsi_host_alloc(&dc395x_driver_template,
4613                     sizeof(struct AdapterCtlBlk));
4614     if (!scsi_host) {
4615         dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4616         goto fail;
4617     }
4618     acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4619     acb->scsi_host = scsi_host;
4620     acb->dev = dev;
4621
4622     /* initialise the adapter and everything we need */
4623     if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4624         dprintkl(KERN_INFO, "adapter init failed\n");
4625         acb = NULL;
4626         goto fail;
4627     }
4628
4629     pci_set_master(dev);
4630
4631     /* get the scsi mid level to scan for new devices on the bus */
4632     if (scsi_add_host(scsi_host, &dev->dev)) {
4633         dprintkl(KERN_ERR, "scsi_add_host failed\n");
4634         goto fail;
4635     }
4636     pci_set_drvdata(dev, scsi_host);
4637     scsi_scan_host(scsi_host);
4638
4639     return 0;
4640
4641 fail:
4642     if (acb != NULL)
4643         adapter_uninit(acb);
4644     if (scsi_host != NULL)
4645         scsi_host_put(scsi_host);
4646     pci_disable_device(dev);
4647     return -ENODEV;
4648 }
4649
4650
4651 /**
4652  * dc395x_remove_one - Called to remove a single instance of the
4653  * adapter.
4654  *
4655  * @dev: The PCI device to initialize.
4656  **/
4657 static void dc395x_remove_one(struct pci_dev *dev)
4658 {
4659     struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4660     struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4661
4662     dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4663
4664     scsi_remove_host(scsi_host);
4665     adapter_uninit(acb);
4666     pci_disable_device(dev);
4667     scsi_host_put(scsi_host);
4668 }
4669
4670
4671 static struct pci_device_id dc395x_pci_table[] = {
4672     {
4673         .vendor     = PCI_VENDOR_ID_TEKRAM,
4674         .device     = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4675         .subvendor  = PCI_ANY_ID,
4676         .subdevice  = PCI_ANY_ID,
4677      },
4678     {}          /* Terminating entry */
4679 };
4680 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4681
4682
4683 static struct pci_driver dc395x_driver = {
4684     .name           = DC395X_NAME,
4685     .id_table       = dc395x_pci_table,
4686     .probe          = dc395x_init_one,
4687     .remove         = dc395x_remove_one,
4688 };
4689 module_pci_driver(dc395x_driver);
4690
4691 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4692 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4693 MODULE_LICENSE("GPL");