drivers/scsi/tmscsim.c

   1 /************************************************************************
   2  *      FILE NAME : TMSCSIM.C                                           *
   3  *           BY   : C.L. Huang,  ching@tekram.com.tw                    *
   4  *      Description: Device Driver for Tekram DC-390(T) PCI SCSI        *
   5  *                   Bus Master Host Adapter                            *
   6  * (C)Copyright 1995-1996 Tekram Technology Co., Ltd.                   *
   7  ************************************************************************
   8  * (C) Copyright: put under GNU GPL in 10/96                            *
   9  *                              (see Documentation/scsi/tmscsim.txt)    *
  10  ************************************************************************
  11  * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $         *
  12  *      Enhancements and bugfixes by                                    *
  13  *      Kurt Garloff <kurt@garloff.de>  <garloff@suse.de>               *
  14  ************************************************************************
  15  *      HISTORY:                                                        *
  16  *                                                                      *
  17  *      REV#    DATE    NAME    DESCRIPTION                             *
  18  *      1.00  96/04/24  CLH     First release                           *
  19  *      1.01  96/06/12  CLH     Fixed bug of Media Change for Removable *
  20  *                              Device, scan all LUN. Support Pre2.0.10 *
  21  *      1.02  96/06/18  CLH     Fixed bug of Command timeout ...        *
  22  *      1.03  96/09/25  KG      Added tmscsim_proc_info()               *
  23  *      1.04  96/10/11  CLH     Updating for support KV 2.0.x           *
  24  *      1.05  96/10/18  KG      Fixed bug in DC390_abort(null ptr deref)*
  25  *      1.06  96/10/25  KG      Fixed module support                    *
  26  *      1.07  96/11/09  KG      Fixed tmscsim_proc_info()               *
  27  *      1.08  96/11/18  KG      Fixed null ptr in DC390_Disconnect()    *
  28  *      1.09  96/11/30  KG      Added register the allocated IO space   *
  29  *      1.10  96/12/05  CLH     Modified tmscsim_proc_info(), and reset *
  30  *                              pending interrupt in DC390_detect()     *
  31  *      1.11  97/02/05  KG/CLH  Fixeds problem with partitions greater  *
  32  *                              than 1GB                                *
  33  *      1.12  98/02/15  MJ      Rewritten PCI probing                   *
  34  *      1.13  98/04/08  KG      Support for non DC390, __initfunc decls,*
  35  *                              changed max devs from 10 to 16          *
  36  *      1.14a 98/05/05  KG      Dynamic DCB allocation, add-single-dev  *
  37  *                              for LUNs if LUN_SCAN (BIOS) not set     *
  38  *                              runtime config using /proc interface    *
  39  *      1.14b 98/05/06  KG      eliminated cli (); sti (); spinlocks    *
  40  *      1.14c 98/05/07  KG      2.0.x compatibility                     *
  41  *      1.20a 98/05/07  KG      changed names of funcs to be consistent *
  42  *                              DC390_ (entry points), dc390_ (internal)*
  43  *                              reworked locking                        *
  44  *      1.20b 98/05/12  KG      bugs: version, kfree, _ctmp             *
  45  *                              debug output                            *
  46  *      1.20c 98/05/12  KG      bugs: kfree, parsing, EEpromDefaults    *
  47  *      1.20d 98/05/14  KG      bugs: list linkage, clear flag after    *
  48  *                              reset on startup, code cleanup          *
  49  *      1.20e 98/05/15  KG      spinlock comments, name space cleanup   *
  50  *                              pLastDCB now part of ACB structure      *
  51  *                              added stats, timeout for 2.1, TagQ bug  *
  52  *                              RESET and INQUIRY interface commands    *
  53  *      1.20f 98/05/18  KG      spinlocks fixes, max_lun fix, free DCBs *
  54  *                              for missing LUNs, pending int           *
  55  *      1.20g 98/05/19  KG      Clean up: Avoid short                   *
  56  *      1.20h 98/05/21  KG      Remove AdaptSCSIID, max_lun ...         *
  57  *      1.20i 98/05/21  KG      Aiiie: Bug with TagQMask                *
  58  *      1.20j 98/05/24  KG      Handle STAT_BUSY, handle pACB->pLinkDCB *
  59  *                              == 0 in remove_dev and DoingSRB_Done    *
  60  *      1.20k 98/05/25  KG      DMA_INT (experimental)                  *
  61  *      1.20l 98/05/27  KG      remove DMA_INT; DMA_IDLE cmds added;    *
  62  *      1.20m 98/06/10  KG      glitch configurable; made some global   *
  63  *                              vars part of ACB; use DC390_readX       *
  64  *      1.20n 98/06/11  KG      startup params                          *
  65  *      1.20o 98/06/15  KG      added TagMaxNum to boot/module params   *
  66  *                              Device Nr -> Idx, TagMaxNum power of 2  *
  67  *      1.20p 98/06/17  KG      Docu updates. Reset depends on settings *
  68  *                              pci_set_master added; 2.0.xx: pcibios_* *
  69  *                              used instead of MechNum things ...      *
  70  *      1.20q 98/06/23  KG      Changed defaults. Added debug code for  *
  71  *                              removable media and fixed it. TagMaxNum *
  72  *                              fixed for DC390. Locking: ACB, DRV for  *
  73  *                              better IRQ sharing. Spelling: Queueing  *
  74  *                              Parsing and glitch_cfg changes. Display *
  75  *                              real SyncSpeed value. Made DisConn      *
  76  *                              functional (!)                          *
  77  *      1.20r 98/06/30  KG      Debug macros, allow disabling DsCn, set *
  78  *                              BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module *
  79  *                              param -1 fixed.                         *
  80  *      1.20s 98/08/20  KG      Debug info on abort(), try to check PCI,*
  81  *                              phys_to_bus instead of phys_to_virt,    *
  82  *                              fixed sel. process, fixed locking,      *
  83  *                              added MODULE_XXX infos, changed IRQ     *
  84  *                              request flags, disable DMA_INT          *
  85  *      1.20t 98/09/07  KG      TagQ report fixed; Write Erase DMA Stat;*
  86  *                              initfunc -> __init; better abort;       *
  87  *                              Timeout for XFER_DONE & BLAST_COMPLETE; *
  88  *                              Allow up to 33 commands being processed *
  89  *      2.0a  98/10/14  KG      Max Cmnds back to 17. DMA_Stat clearing *
  90  *                              all flags. Clear within while() loops   *
  91  *                              in DataIn_0/Out_0. Null ptr in dumpinfo *
  92  *                              for pSRB==0. Better locking during init.*
  93  *                              bios_param() now respects part. table.  *
  94  *      2.0b  98/10/24  KG      Docu fixes. Timeout Msg in DMA Blast.   *
  95  *                              Disallow illegal idx in INQUIRY/REMOVE  *
  96  *      2.0c  98/11/19  KG      Cleaned up detect/init for SMP boxes,   *
  97  *                              Write Erase DMA (1.20t) caused problems *
  98  *      2.0d  98/12/25  KG      Christmas release ;-) Message handling  *
  99  *                              completely reworked. Handle target ini- *
 100  *                              tiated SDTR correctly.                  *
 101  *      2.0d1 99/01/25  KG      Try to handle RESTORE_PTR               *
 102  *      2.0d2 99/02/08  KG      Check for failure of kmalloc, correct   *
 103  *                              inclusion of scsicam.h, DelayReset      *
 104  *      2.0d3 99/05/31  KG      DRIVER_OK -> DID_OK, DID_NO_CONNECT,    *
 105  *                              detect Target mode and warn.            *
 106  *                              pcmd->result handling cleaned up.       *
 107  *      2.0d4 99/06/01  KG      Cleaned selection process. Found bug    *
 108  *                              which prevented more than 16 tags. Now: *
 109  *                              24. SDTR cleanup. Cleaner multi-LUN     *
 110  *                              handling. Don't modify ControlRegs/FIFO *
 111  *                              when connected.                         *
 112  *      2.0d5 99/06/01  KG      Clear DevID, Fix INQUIRY after cfg chg. *
 113  *      2.0d6 99/06/02  KG      Added ADD special command to allow cfg. *
 114  *                              before detection. Reset SYNC_NEGO_DONE  *
 115  *                              after a bus reset.                      *
 116  *      2.0d7 99/06/03  KG      Fixed bugs wrt add,remove commands      *
 117  *      2.0d8 99/06/04  KG      Removed copying of cmnd into CmdBlock.  *
 118  *                              Fixed Oops in _release().               *
 119  *      2.0d9 99/06/06  KG      Also tag queue INQUIRY, T_U_R, ...      *
 120  *                              Allow arb. no. of Tagged Cmnds. Max 32  *
 121  *      2.0d1099/06/20  KG      TagMaxNo changes now honoured! Queueing *
 122  *                              clearified (renamed ..) TagMask handling*
 123  *                              cleaned.                                *
 124  *      2.0d1199/06/28  KG      cmd->result now identical to 2.0d2      *
 125  *      2.0d1299/07/04  KG      Changed order of processing in IRQ      *
 126  *      2.0d1399/07/05  KG      Don't update DCB fields if removed      *
 127  *      2.0d1499/07/05  KG      remove_dev: Move kfree() to the end     *
 128  *      2.0d1599/07/12  KG      use_new_eh_code: 0, ULONG -> UINT where *
 129  *                              appropriate                             *
 130  *      2.0d1699/07/13  KG      Reenable StartSCSI interrupt, Retry msg *
 131  *      2.0d1799/07/15  KG      Remove debug msg. Disable recfg. when   *
 132  *                              there are queued cmnds                  *
 133  *      2.0d1899/07/18  KG      Selection timeout: Don't requeue        *
 134  *      2.0d1999/07/18  KG      Abort: Only call scsi_done if dequeued  *
 135  *      2.0d2099/07/19  KG      Rst_Detect: DoingSRB_Done               *
 136  *      2.0d2199/08/15  KG      dev_id for request/free_irq, cmnd[0] for*
 137  *                              RETRY, SRBdone does DID_ABORT for the   *
 138  *                              cmd passed by DC390_reset()             *
 139  *      2.0d2299/08/25  KG      dev_id fixed. can_queue: 42             *
 140  *      2.0d2399/08/25  KG      Removed some debugging code. dev_id     *
 141  *                              now is set to pACB. Use u8,u16,u32.     *
 142  *      2.0d2499/11/14  KG      Unreg. I/O if failed IRQ alloc. Call    *
 143  *                              done () w/ DID_BAD_TARGET in case of    *
 144  *                              missing DCB. We are old EH!!            *
 145  *      2.0d2500/01/15  KG      2.3.3x compat from Andreas Schultz      *
 146  *                              set unique_id. Disable RETRY message.   *
 147  *      2.0d2600/01/29  KG      Go to new EH.                           *
 148  *      2.0d2700/01/31  KG      ... but maintain 2.0 compat.            *
 149  *                              and fix DCB freeing                     *
 150  *      2.0d2800/02/14  KG      Queue statistics fixed, dump special cmd*
 151  *                              Waiting_Timer for failed StartSCSI      *
 152  *                              New EH: Don't return cmnds to ML on RST *
 153  *                              Use old EH (don't have new EH fns yet)  *
 154  *                              Reset: Unlock, but refuse to queue      *
 155  *                              2.3 __setup function                    *
 156  *      2.0e  00/05/22  KG      Return residual for 2.3                 *
 157  *      2.0e1 00/05/25  KG      Compile fixes for 2.3.99                *
 158  *      2.0e2 00/05/27  KG      Jeff Garzik's pci_enable_device()       *
 159  *      2.0e3 00/09/29  KG      Some 2.4 changes. Don't try Sync Nego   *
 160  *                              before INQUIRY has reported ability.    *
 161  *                              Recognise INQUIRY as scanning command.  *
 162  *      2.0e4 00/10/13  KG      Allow compilation into 2.4 kernel       *
 163  *      2.0e5 00/11/17  KG      Store Inq.flags in DCB                  *
 164  *      2.0e6 00/11/22  KG      2.4 init function (Thx to O.Schumann)   *
 165  *                              2.4 PCI device table (Thx to A.Richter) *
 166  *      2.0e7 00/11/28  KG      Allow overriding of BIOS settings       *
 167  *      2.0f  00/12/20  KG      Handle failed INQUIRYs during scan      *
 168  *      2.1a  03/11/29  GL, KG  Initial fixing for 2.6. Convert to      *
 169  *                              use the current PCI-mapping API, update *
 170  *                              command-queuing.                        *
 171  *      2.1b  04/04/13  GL      Fix for 64-bit platforms                *
 172  *      2.1b1 04/01/31  GL      (applied 05.04) Remove internal         *
 173  *                              command-queuing.                        *
 174  *      2.1b2 04/02/01  CH      (applied 05.04) Fix error-handling      *
 175  *      2.1c  04/05/23  GL      Update to use the new pci_driver API,   *
 176  *                              some scsi EH updates, more cleanup.     *
 177  *      2.1d  04/05/27  GL      Moved setting of scan_devices to        *
 178  *                              slave_alloc/_configure/_destroy, as     *
 179  *                              suggested by CH.                        *
 180  ***********************************************************************/
 181
 182 /* DEBUG options */
 183 //#define DC390_DEBUG0
 184 //#define DC390_DEBUG1
 185 //#define DC390_DCBDEBUG
 186 //#define DC390_PARSEDEBUG
 187 //#define DC390_REMOVABLEDEBUG
 188 //#define DC390_LOCKDEBUG
 189
 190 //#define NOP do{}while(0)
 191 #define C_NOP
 192
 193 /* Debug definitions */
 194 #ifdef DC390_DEBUG0
 195 # define DEBUG0(x) x
 196 #else
 197 # define DEBUG0(x) C_NOP
 198 #endif
 199 #ifdef DC390_DEBUG1
 200 # define DEBUG1(x) x
 201 #else
 202 # define DEBUG1(x) C_NOP
 203 #endif
 204 #ifdef DC390_DCBDEBUG
 205 # define DCBDEBUG(x) x
 206 #else
 207 # define DCBDEBUG(x) C_NOP
 208 #endif
 209 #ifdef DC390_PARSEDEBUG
 210 # define PARSEDEBUG(x) x
 211 #else
 212 # define PARSEDEBUG(x) C_NOP
 213 #endif
 214 #ifdef DC390_REMOVABLEDEBUG
 215 # define REMOVABLEDEBUG(x) x
 216 #else
 217 # define REMOVABLEDEBUG(x) C_NOP
 218 #endif
 219 #define DCBDEBUG1(x) C_NOP
 220
 221 #include <linux/module.h>
 222 #include <linux/delay.h>
 223 #include <linux/signal.h>
 224 #include <linux/errno.h>
 225 #include <linux/kernel.h>
 226 #include <linux/ioport.h>
 227 #include <linux/pci.h>
 228 #include <linux/proc_fs.h>
 229 #include <linux/string.h>
 230 #include <linux/mm.h>
 231 #include <linux/blkdev.h>
 232 #include <linux/timer.h>
 233 #include <linux/interrupt.h>
 234 #include <linux/init.h>
 235 #include <linux/spinlock.h>
 236 #include <asm/io.h>
 237
 238 #include <scsi/scsi.h>
 239 #include <scsi/scsi_cmnd.h>
 240 #include <scsi/scsi_device.h>
 241 #include <scsi/scsi_host.h>
 242 #include <scsi/scsicam.h>
 243 #include <scsi/scsi_tcq.h>
 244
 245
 246 #define DC390_BANNER "Tekram DC390/AM53C974"
 247 #define DC390_VERSION "2.1d 2004-05-27"
 248
 249 #define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI
 250
 251 #include "tmscsim.h"
 252
 253
 254 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 255 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 256 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 257 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 258 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 259 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 260 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 261 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 262 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 263 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 264 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 265 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 266 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 267 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 268
 269 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
 270 static void dc390_Disconnect( struct dc390_acb* pACB );
 271 static void dc390_Reselect( struct dc390_acb* pACB );
 272 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
 273 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
 274 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
 275 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
 276 static void dc390_ResetDevParam(struct dc390_acb* pACB);
 277
 278 static u32      dc390_laststatus = 0;
 279 static u8       dc390_adapterCnt = 0;
 280
 281 static int disable_clustering;
 282 module_param(disable_clustering, int, S_IRUGO);
 283 MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
 284
 285 /* Startup values, to be overriden on the commandline */
 286 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
 287
 288 module_param_array(tmscsim, int, NULL, 0);
 289 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
 290 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
 291 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
 292 MODULE_LICENSE("GPL");
 293 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
 294
 295 static void *dc390_phase0[]={
 296        dc390_DataOut_0,
 297        dc390_DataIn_0,
 298        dc390_Command_0,
 299        dc390_Status_0,
 300        dc390_Nop_0,
 301        dc390_Nop_0,
 302        dc390_MsgOut_0,
 303        dc390_MsgIn_0,
 304        dc390_Nop_1
 305        };
 306
 307 static void *dc390_phase1[]={
 308        dc390_DataOutPhase,
 309        dc390_DataInPhase,
 310        dc390_CommandPhase,
 311        dc390_StatusPhase,
 312        dc390_Nop_0,
 313        dc390_Nop_0,
 314        dc390_MsgOutPhase,
 315        dc390_MsgInPhase,
 316        dc390_Nop_1
 317        };
 318
 319 #ifdef DC390_DEBUG1
 320 static char* dc390_p0_str[] = {
 321        "dc390_DataOut_0",
 322        "dc390_DataIn_0",
 323        "dc390_Command_0",
 324        "dc390_Status_0",
 325        "dc390_Nop_0",
 326        "dc390_Nop_0",
 327        "dc390_MsgOut_0",
 328        "dc390_MsgIn_0",
 329        "dc390_Nop_1"
 330        };
 331
 332 static char* dc390_p1_str[] = {
 333        "dc390_DataOutPhase",
 334        "dc390_DataInPhase",
 335        "dc390_CommandPhase",
 336        "dc390_StatusPhase",
 337        "dc390_Nop_0",
 338        "dc390_Nop_0",
 339        "dc390_MsgOutPhase",
 340        "dc390_MsgInPhase",
 341        "dc390_Nop_1"
 342        };
 343 #endif
 344
 345 static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
 346 static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
 347 static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
 348
 349 /***********************************************************************
 350  * Functions for the management of the internal structures
 351  * (DCBs, SRBs, Queueing)
 352  *
 353  **********************************************************************/
 354 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 355 {
 356    struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 357    while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 358      {
 359         pDCB = pDCB->pNextDCB;
 360         if (pDCB == pACB->pLinkDCB)
 361              return NULL;
 362      }
 363    DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 364                       pDCB, pDCB->TargetID, pDCB->TargetLUN));
 365    return pDCB;
 366 }
 367
 368 /* Insert SRB oin top of free list */
 369 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 370 {
 371     DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 372     pSRB->pNextSRB = pACB->pFreeSRB;
 373     pACB->pFreeSRB = pSRB;
 374 }
 375
 376 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 377 {
 378     pDCB->GoingSRBCnt++;
 379     DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 380     /* Append to the list of Going commands */
 381     if( pDCB->pGoingSRB )
 382         pDCB->pGoingLast->pNextSRB = pSRB;
 383     else
 384         pDCB->pGoingSRB = pSRB;
 385
 386     pDCB->pGoingLast = pSRB;
 387     /* No next one in sent list */
 388     pSRB->pNextSRB = NULL;
 389 }
 390
 391 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 392 {
 393         DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 394    if (pSRB == pDCB->pGoingSRB)
 395         pDCB->pGoingSRB = pSRB->pNextSRB;
 396    else
 397      {
 398         struct dc390_srb* psrb = pDCB->pGoingSRB;
 399         while (psrb && psrb->pNextSRB != pSRB)
 400           psrb = psrb->pNextSRB;
 401         if (!psrb)
 402           { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 403         psrb->pNextSRB = pSRB->pNextSRB;
 404         if (pSRB == pDCB->pGoingLast)
 405           pDCB->pGoingLast = psrb;
 406      }
 407    pDCB->GoingSRBCnt--;
 408 }
 409
 410 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 411 {
 412         memset(sg, 0, sizeof(struct scatterlist));
 413         sg->page        = virt_to_page(addr);
 414         sg->length      = length;
 415         sg->offset      = (unsigned long)addr & ~PAGE_MASK;
 416         return sg;
 417 }
 418
 419 /* Create pci mapping */
 420 static int dc390_pci_map (struct dc390_srb* pSRB)
 421 {
 422         int error = 0;
 423         struct scsi_cmnd *pcmd = pSRB->pcmd;
 424         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 425         dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 426
 427         /* Map sense buffer */
 428         if (pSRB->SRBFlag & AUTO_REQSENSE) {
 429                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
 430                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 431                                                      DMA_FROM_DEVICE);
 432                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 433
 434                 /* TODO: error handling */
 435                 if (pSRB->SGcount != 1)
 436                         error = 1;
 437                 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 438         /* Map SG list */
 439         } else if (pcmd->use_sg) {
 440                 pSRB->pSegmentList      = (struct scatterlist *) pcmd->request_buffer;
 441                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, pcmd->use_sg,
 442                                                      pcmd->sc_data_direction);
 443                 /* TODO: error handling */
 444                 if (!pSRB->SGcount)
 445                         error = 1;
 446                 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 447                               __FUNCTION__, pcmd->request_buffer, pSRB->SGcount, pcmd->use_sg));
 448         /* Map single segment */
 449         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 450                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->request_buffer, pcmd->request_bufflen);
 451                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 452                                                      pcmd->sc_data_direction);
 453                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 454
 455                 /* TODO: error handling */
 456                 if (pSRB->SGcount != 1)
 457                         error = 1;
 458                 DEBUG1(printk("%s(): Mapped request buffer %p at %x\n", __FUNCTION__, pcmd->request_buffer, cmdp->saved_dma_handle));
 459         /* No mapping !? */
 460         } else
 461                 pSRB->SGcount = 0;
 462
 463         return error;
 464 }
 465
 466 /* Remove pci mapping */
 467 static void dc390_pci_unmap (struct dc390_srb* pSRB)
 468 {
 469         struct scsi_cmnd *pcmd = pSRB->pcmd;
 470         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 471         DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 472
 473         if (pSRB->SRBFlag) {
 474                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 475                 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 476         } else if (pcmd->use_sg) {
 477                 pci_unmap_sg(pdev, pcmd->request_buffer, pcmd->use_sg, pcmd->sc_data_direction);
 478                 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n", __FUNCTION__, pcmd->request_buffer, pcmd->use_sg));
 479         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 480                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, pcmd->sc_data_direction);
 481                 DEBUG1(printk("%s(): Unmapped request buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 482         }
 483 }
 484
 485 static void __inline__
 486 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 487 {
 488         if (pSRB->TagNumber != SCSI_NO_TAG) {
 489                 pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 490                 pSRB->TagNumber = SCSI_NO_TAG;
 491         }
 492 }
 493
 494
 495 static int
 496 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 497 {
 498     struct scsi_cmnd *scmd = pSRB->pcmd;
 499     struct scsi_device *sdev = scmd->device;
 500     u8 cmd, disc_allowed, try_sync_nego;
 501     char tag[2];
 502
 503     pSRB->ScsiPhase = SCSI_NOP0;
 504
 505     if (pACB->Connected)
 506     {
 507         // Should not happen normally
 508         printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 509                 pSRB->SRBState, pSRB->SRBFlag);
 510         pSRB->SRBState = SRB_READY;
 511         pACB->SelConn++;
 512         return 1;
 513     }
 514     if (time_before (jiffies, pACB->pScsiHost->last_reset))
 515     {
 516         DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 517         return 1;
 518     }
 519     /* KG: Moved pci mapping here */
 520     dc390_pci_map(pSRB);
 521     /* TODO: error handling */
 522     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 523     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 524     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 525     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 526     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 527     DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 528     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 529     DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 530             scmd->cmnd[0], pDCB->SyncMode));
 531
 532     /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 533      * Contingent Allegiance Condition (6.6), where no tags should be used.
 534      * All other have to be allowed to disconnect to prevent Incorrect
 535      * Initiator Connection (6.8.2/6.5.2) */
 536     /* Changed KG, 99/06/06 */
 537     if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 538         disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 539     else
 540         disc_allowed = 0;
 541
 542     if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 543         (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 544           !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 545       try_sync_nego = 1;
 546     else
 547       try_sync_nego = 0;
 548
 549     pSRB->MsgCnt = 0;
 550     cmd = SEL_W_ATN;
 551     DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 552     /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 553     if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 554         DC390_write8(ScsiFifo, tag[0]);
 555         pDCB->TagMask |= 1 << tag[1];
 556         pSRB->TagNumber = tag[1];
 557         DC390_write8(ScsiFifo, tag[1]);
 558         DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->pid, pSRB, tag[1]));
 559         cmd = SEL_W_ATN3;
 560     } else {
 561         /* No TagQ */
 562 //no_tag:
 563         DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->pid, pSRB));
 564     }
 565
 566     pSRB->SRBState = SRB_START_;
 567
 568     if (try_sync_nego)
 569       {
 570         u8 Sync_Off = pDCB->SyncOffset;
 571         DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 572         pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 573         pSRB->MsgOutBuf[1] = 3;
 574         pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 575         pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 576         if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 577         pSRB->MsgOutBuf[4] = Sync_Off;
 578         pSRB->MsgCnt = 5;
 579         //pSRB->SRBState = SRB_MSGOUT_;
 580         pSRB->SRBState |= DO_SYNC_NEGO;
 581         cmd = SEL_W_ATN_STOP;
 582       }
 583
 584     /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 585     if (cmd != SEL_W_ATN_STOP)
 586       {
 587         if( pSRB->SRBFlag & AUTO_REQSENSE )
 588           {
 589             DC390_write8 (ScsiFifo, REQUEST_SENSE);
 590             DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 591             DC390_write8 (ScsiFifo, 0);
 592             DC390_write8 (ScsiFifo, 0);
 593             DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
 594             DC390_write8 (ScsiFifo, 0);
 595             DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 596           }
 597         else    /* write cmnd to bus */
 598           {
 599             u8 *ptr; u8 i;
 600             ptr = (u8 *)scmd->cmnd;
 601             for (i = 0; i < scmd->cmd_len; i++)
 602               DC390_write8 (ScsiFifo, *(ptr++));
 603           }
 604       }
 605     DEBUG0(if (pACB->pActiveDCB)        \
 606            printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 607     DEBUG0(if (pDCB->pActiveSRB)        \
 608            printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 609     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 610     if (DC390_read8 (Scsi_Status) & INTERRUPT)
 611     {
 612         dc390_freetag (pDCB, pSRB);
 613         DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
 614                 scmd->pid, scmd->device->id, scmd->device->lun));
 615         pSRB->SRBState = SRB_READY;
 616         //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 617         pACB->SelLost++;
 618         return 1;
 619     }
 620     DC390_write8 (ScsiCmd, cmd);
 621     pACB->pActiveDCB = pDCB;
 622     pDCB->pActiveSRB = pSRB;
 623     pACB->Connected = 1;
 624     pSRB->ScsiPhase = SCSI_NOP1;
 625     return 0;
 626 }
 627
 628
 629 static void __inline__
 630 dc390_InvalidCmd(struct dc390_acb* pACB)
 631 {
 632         if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 633                 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 634 }
 635
 636
 637 static irqreturn_t __inline__
 638 DC390_Interrupt(void *dev_id)
 639 {
 640     struct dc390_acb *pACB = dev_id;
 641     struct dc390_dcb *pDCB;
 642     struct dc390_srb *pSRB;
 643     u8  sstatus=0;
 644     u8  phase;
 645     void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 646     u8  istate, istatus;
 647
 648     sstatus = DC390_read8 (Scsi_Status);
 649     if( !(sstatus & INTERRUPT) )
 650         return IRQ_NONE;
 651
 652     DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 653
 654     //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 655     //dstatus = DC390_read8 (DMA_Status);
 656     //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 657
 658     spin_lock_irq(pACB->pScsiHost->host_lock);
 659
 660     istate = DC390_read8 (Intern_State);
 661     istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 662
 663     DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 664     dc390_laststatus &= ~0x00ffffff;
 665     dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 666
 667     if (sstatus & ILLEGAL_OP_ERR)
 668     {
 669         printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 670         dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 671     }
 672
 673     else if (istatus &  INVALID_CMD)
 674     {
 675         printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 676         dc390_InvalidCmd( pACB );
 677         goto unlock;
 678     }
 679
 680     if (istatus &  SCSI_RESET)
 681     {
 682         dc390_ScsiRstDetect( pACB );
 683         goto unlock;
 684     }
 685
 686     if (istatus &  DISCONNECTED)
 687     {
 688         dc390_Disconnect( pACB );
 689         goto unlock;
 690     }
 691
 692     if (istatus &  RESELECTED)
 693     {
 694         dc390_Reselect( pACB );
 695         goto unlock;
 696     }
 697
 698     else if (istatus & (SELECTED | SEL_ATTENTION))
 699     {
 700         printk (KERN_ERR "DC390: Target mode not supported!\n");
 701         goto unlock;
 702     }
 703
 704     if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 705     {
 706         pDCB = pACB->pActiveDCB;
 707         if (!pDCB)
 708         {
 709                 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 710                 goto unlock;
 711         }
 712         pSRB = pDCB->pActiveSRB;
 713         if( pDCB->DCBFlag & ABORT_DEV_ )
 714           dc390_EnableMsgOut_Abort (pACB, pSRB);
 715
 716         phase = pSRB->ScsiPhase;
 717         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 718         stateV = (void *) dc390_phase0[phase];
 719         ( *stateV )( pACB, pSRB, &sstatus );
 720
 721         pSRB->ScsiPhase = sstatus & 7;
 722         phase = (u8) sstatus & 7;
 723         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 724         stateV = (void *) dc390_phase1[phase];
 725         ( *stateV )( pACB, pSRB, &sstatus );
 726     }
 727
 728  unlock:
 729     spin_unlock_irq(pACB->pScsiHost->host_lock);
 730     return IRQ_HANDLED;
 731 }
 732
 733 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
 734 {
 735     irqreturn_t ret;
 736     DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 737     /* Locking is done in DC390_Interrupt */
 738     ret = DC390_Interrupt(dev_id);
 739     DEBUG1(printk (".. IRQ returned\n"));
 740     return ret;
 741 }
 742
 743 static void
 744 dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 745 {
 746     u8   sstatus;
 747     struct scatterlist *psgl;
 748     u32    ResidCnt, xferCnt;
 749     u8   dstate = 0;
 750
 751     sstatus = *psstatus;
 752
 753     if( !(pSRB->SRBState & SRB_XFERPAD) )
 754     {
 755         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 756             pSRB->SRBStatus |= PARITY_ERROR;
 757
 758         if( sstatus & COUNT_2_ZERO )
 759         {
 760             unsigned long timeout = jiffies + HZ;
 761
 762             /* Function called from the ISR with the host_lock held and interrupts disabled */
 763             if (pSRB->SGToBeXferLen)
 764                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 765                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 766                     udelay(50);
 767                     spin_lock_irq(pACB->pScsiHost->host_lock);
 768                 }
 769             if (!time_before(jiffies, timeout))
 770                 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 771                         DC390_read32 (DMA_Wk_ByteCntr));
 772             dc390_laststatus &= ~0xff000000;
 773             dc390_laststatus |= dstate << 24;
 774             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 775             pSRB->SGIndex++;
 776             if( pSRB->SGIndex < pSRB->SGcount )
 777             {
 778                 pSRB->pSegmentList++;
 779                 psgl = pSRB->pSegmentList;
 780
 781                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 782                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 783             }
 784             else
 785                 pSRB->SGToBeXferLen = 0;
 786         }
 787         else
 788         {
 789             ResidCnt  = (u32) DC390_read8 (Current_Fifo) & 0x1f;
 790             ResidCnt |= (u32) DC390_read8 (CtcReg_High) << 16;
 791             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid) << 8;
 792             ResidCnt += (u32) DC390_read8 (CtcReg_Low);
 793
 794             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 795             pSRB->SGBusAddr += xferCnt;
 796             pSRB->TotalXferredLen += xferCnt;
 797             pSRB->SGToBeXferLen = ResidCnt;
 798         }
 799     }
 800     if ((*psstatus & 7) != SCSI_DATA_OUT)
 801     {
 802             DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
 803             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 804     }
 805 }
 806
 807 static void
 808 dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 809 {
 810     u8   sstatus, residual, bval;
 811     struct scatterlist *psgl;
 812     u32    ResidCnt, i;
 813     unsigned long   xferCnt;
 814     u8      *ptr;
 815
 816     sstatus = *psstatus;
 817
 818     if( !(pSRB->SRBState & SRB_XFERPAD) )
 819     {
 820         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 821             pSRB->SRBStatus |= PARITY_ERROR;
 822
 823         if( sstatus & COUNT_2_ZERO )
 824         {
 825             int dstate = 0;
 826             unsigned long timeout = jiffies + HZ;
 827
 828             /* Function called from the ISR with the host_lock held and interrupts disabled */
 829             if (pSRB->SGToBeXferLen)
 830                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 831                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 832                     udelay(50);
 833                     spin_lock_irq(pACB->pScsiHost->host_lock);
 834                 }
 835             if (!time_before(jiffies, timeout)) {
 836                 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 837                         DC390_read32 (DMA_Wk_ByteCntr));
 838                 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 839             }
 840             dc390_laststatus &= ~0xff000000;
 841             dc390_laststatus |= dstate << 24;
 842             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 843                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 844                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
 845             DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%i,ToBeXfer=%li),", ResidCnt, pSRB->SGToBeXferLen));
 846
 847             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 848
 849             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 850             pSRB->SGIndex++;
 851             if( pSRB->SGIndex < pSRB->SGcount )
 852             {
 853                 pSRB->pSegmentList++;
 854                 psgl = pSRB->pSegmentList;
 855
 856                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 857                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 858             }
 859             else
 860                 pSRB->SGToBeXferLen = 0;
 861         }
 862         else    /* phase changed */
 863         {
 864             residual = 0;
 865             bval = DC390_read8 (Current_Fifo);
 866             while( bval & 0x1f )
 867             {
 868                 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 869                 if( (bval & 0x1f) == 1 )
 870                 {
 871                     for(i=0; i < 0x100; i++)
 872                     {
 873                         bval = DC390_read8 (Current_Fifo);
 874                         if( !(bval & 0x1f) )
 875                             goto din_1;
 876                         else if( i == 0x0ff )
 877                         {
 878                             residual = 1;   /* ;1 residual byte */
 879                             goto din_1;
 880                         }
 881                     }
 882                 }
 883                 else
 884                     bval = DC390_read8 (Current_Fifo);
 885             }
 886 din_1:
 887             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 888             for (i = 0xa000; i; i--)
 889             {
 890                 bval = DC390_read8 (DMA_Status);
 891                 if (bval & BLAST_COMPLETE)
 892                     break;
 893             }
 894             /* It seems a DMA Blast abort isn't that bad ... */
 895             if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 896             //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 897             dc390_laststatus &= ~0xff000000; dc390_laststatus |= bval << 24;
 898
 899             DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
 900             ResidCnt = (u32) DC390_read8 (CtcReg_High);
 901             ResidCnt <<= 8;
 902             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid);
 903             ResidCnt <<= 8;
 904             ResidCnt |= (u32) DC390_read8 (CtcReg_Low);
 905
 906             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 907             pSRB->SGBusAddr += xferCnt;
 908             pSRB->TotalXferredLen += xferCnt;
 909             pSRB->SGToBeXferLen = ResidCnt;
 910
 911             if( residual )
 912             {
 913                 static int feedback_requested;
 914                 bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 915
 916                 if (!feedback_requested) {
 917                         feedback_requested = 1;
 918                         printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
 919                                "to help improve support for your system.\n", __FILE__);
 920                 }
 921
 922                 ptr = (u8 *) bus_to_virt( pSRB->SGBusAddr );
 923                 *ptr = bval;
 924                 pSRB->SGBusAddr++; xferCnt++;
 925                 pSRB->TotalXferredLen++;
 926                 pSRB->SGToBeXferLen--;
 927             }
 928             DEBUG1(printk (KERN_DEBUG "Xfered: %li, Total: %li, Remaining: %li\n", xferCnt,\
 929                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
 930
 931         }
 932     }
 933     if ((*psstatus & 7) != SCSI_DATA_IN)
 934     {
 935             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 936             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 937     }
 938 }
 939
 940 static void
 941 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 942 {
 943 }
 944
 945 static void
 946 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 947 {
 948
 949     pSRB->TargetStatus = DC390_read8 (ScsiFifo);
 950     //udelay (1);
 951     pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
 952
 953     *psstatus = SCSI_NOP0;
 954     pSRB->SRBState = SRB_COMPLETED;
 955     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
 956 }
 957
 958 static void
 959 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 960 {
 961     if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
 962         *psstatus = SCSI_NOP0;
 963     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 964 }
 965
 966
 967 static void __inline__
 968 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
 969 {
 970   DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 971   DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 972   DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 973   DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 974   dc390_SetXferRate (pACB, pDCB);
 975 }
 976
 977
 978 #ifdef DC390_DEBUG0
 979 static void
 980 dc390_printMsg (u8 *MsgBuf, u8 len)
 981 {
 982   int i;
 983   printk (" %02x", MsgBuf[0]);
 984   for (i = 1; i < len; i++)
 985     printk (" %02x", MsgBuf[i]);
 986   printk ("\n");
 987 }
 988 #endif
 989
 990 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
 991
 992 /* reject_msg */
 993 static void __inline__
 994 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 995 {
 996   pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
 997   pSRB->MsgCnt = 1;
 998   DC390_ENABLE_MSGOUT;
 999   DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
1000 }
1001
1002 /* abort command */
1003 static void
1004 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1005 {
1006     pSRB->MsgOutBuf[0] = ABORT;
1007     pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1008     pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1009 }
1010
1011 static struct dc390_srb*
1012 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1013 {
1014   struct dc390_srb* pSRB = pDCB->pGoingSRB;
1015
1016   if (pSRB)
1017     {
1018         struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1019         pSRB = (struct dc390_srb *)scmd->host_scribble;
1020
1021         if (pDCB->DCBFlag & ABORT_DEV_)
1022         {
1023           pSRB->SRBState = SRB_ABORT_SENT;
1024           dc390_EnableMsgOut_Abort( pACB, pSRB );
1025         }
1026
1027         if (!(pSRB->SRBState & SRB_DISCONNECT))
1028                 goto mingx0;
1029
1030         pDCB->pActiveSRB = pSRB;
1031         pSRB->SRBState = SRB_DATA_XFER;
1032     }
1033   else
1034     {
1035     mingx0:
1036       pSRB = pACB->pTmpSRB;
1037       pSRB->SRBState = SRB_UNEXPECT_RESEL;
1038       pDCB->pActiveSRB = pSRB;
1039       pSRB->MsgOutBuf[0] = ABORT_TAG;
1040       pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1041     }
1042   return pSRB;
1043 }
1044
1045
1046 /* set async transfer mode */
1047 static void
1048 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1049 {
1050   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1051   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1052     printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1053   pSRB->SRBState &= ~DO_SYNC_NEGO;
1054   pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1055   pDCB->SyncPeriod = 0;
1056   pDCB->SyncOffset = 0;
1057   //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1058   pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1059   pDCB->CtrlR4 &= 0x3f;
1060   pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1061   dc390_reprog (pACB, pDCB);
1062 }
1063
1064 /* set sync transfer mode */
1065 static void
1066 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1067 {
1068   u8 bval;
1069   u16 wval, wval1;
1070   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1071   u8 oldsyncperiod = pDCB->SyncPeriod;
1072   u8 oldsyncoffset = pDCB->SyncOffset;
1073
1074   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1075     {
1076       printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1077               pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1078
1079       /* reject */
1080       //dc390_MsgIn_reject (pACB, pSRB);
1081       //return dc390_MsgIn_set_async (pACB, pSRB);
1082
1083       /* Reply with corrected SDTR Message */
1084       if (pSRB->MsgInBuf[4] > 15)
1085         {
1086           printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1087           pSRB->MsgInBuf[4] = 15;
1088         }
1089       if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1090         {
1091           printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1092           pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1093         }
1094       memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1095       pSRB->MsgCnt = 5;
1096       DC390_ENABLE_MSGOUT;
1097     }
1098
1099   pSRB->SRBState &= ~DO_SYNC_NEGO;
1100   pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1101   pDCB->SyncOffset &= 0x0f0;
1102   pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1103   pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1104
1105   wval = (u16) pSRB->MsgInBuf[3];
1106   wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1107   if( (wval1 * 25) != wval) wval1++;
1108   bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1109
1110   pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1111   if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1112     pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1113   else
1114     pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1115   if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1116
1117   if (wval1 >= 8)
1118     {
1119       wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1120       bval = FAST_CLK;          /* fast clock / normal scsi */
1121       pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1122     }
1123
1124   pDCB->CtrlR3 = bval;
1125   pDCB->SyncPeriod = (u8)wval1;
1126
1127   if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1128     {
1129       if (! (bval & FAST_SCSI)) wval1++;
1130       printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1131               40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1132     }
1133
1134   dc390_reprog (pACB, pDCB);
1135 }
1136
1137
1138 /* handle RESTORE_PTR */
1139 /* I presume, this command is already mapped, so, have to remap. */
1140 static void
1141 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1142 {
1143     struct scsi_cmnd *pcmd = pSRB->pcmd;
1144     struct scatterlist *psgl;
1145     pSRB->TotalXferredLen = 0;
1146     pSRB->SGIndex = 0;
1147     if (pcmd->use_sg) {
1148         pSRB->pSegmentList = (struct scatterlist *)pcmd->request_buffer;
1149         psgl = pSRB->pSegmentList;
1150         //dc390_pci_sync(pSRB);
1151
1152         while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1153         {
1154             pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1155             pSRB->SGIndex++;
1156             if( pSRB->SGIndex < pSRB->SGcount )
1157             {
1158                 pSRB->pSegmentList++;
1159                 psgl = pSRB->pSegmentList;
1160                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1161                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1162             }
1163             else
1164                 pSRB->SGToBeXferLen = 0;
1165         }
1166         pSRB->SGToBeXferLen -= (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1167         pSRB->SGBusAddr += (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1168         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1169                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1170
1171     } else if(pcmd->request_buffer) {
1172         //dc390_pci_sync(pSRB);
1173
1174         sg_dma_len(&pSRB->Segmentx) = pcmd->request_bufflen - pSRB->Saved_Ptr;
1175         pSRB->SGcount = 1;
1176         pSRB->pSegmentList = (struct scatterlist *) &pSRB->Segmentx;
1177     } else {
1178          pSRB->SGcount = 0;
1179          printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1180     }
1181
1182   pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1183 }
1184
1185
1186 /* According to the docs, the AM53C974 reads the message and
1187  * generates a Successful Operation IRQ before asserting ACK for
1188  * the last byte (how does it know whether it's the last ?) */
1189 /* The old code handled it in another way, indicating, that on
1190  * every message byte an IRQ is generated and every byte has to
1191  * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1192 /* The old implementation was correct. Sigh! */
1193
1194 /* Check if the message is complete */
1195 static u8 __inline__
1196 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1197 {
1198   if (*msgbuf == EXTENDED_MESSAGE)
1199   {
1200         if (len < 2) return 0;
1201         if (len < msgbuf[1] + 2) return 0;
1202   }
1203   else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1204         if (len < 2) return 0;
1205   return 1;
1206 }
1207
1208
1209
1210 /* read and eval received messages */
1211 static void
1212 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1213 {
1214     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1215
1216     /* Read the msg */
1217
1218     pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1219     //pSRB->SRBState = 0;
1220
1221     /* Msg complete ? */
1222     if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1223       {
1224         DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1225         /* Now eval the msg */
1226         switch (pSRB->MsgInBuf[0])
1227           {
1228           case DISCONNECT:
1229             pSRB->SRBState = SRB_DISCONNECT; break;
1230
1231           case SIMPLE_QUEUE_TAG:
1232           case HEAD_OF_QUEUE_TAG:
1233           case ORDERED_QUEUE_TAG:
1234             pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1235             break;
1236
1237           case MESSAGE_REJECT:
1238             DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1239             pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1240             if( pSRB->SRBState & DO_SYNC_NEGO)
1241               dc390_MsgIn_set_async (pACB, pSRB);
1242             break;
1243
1244           case EXTENDED_MESSAGE:
1245             /* reject every extended msg but SDTR */
1246             if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1247               dc390_MsgIn_reject (pACB, pSRB);
1248             else
1249               {
1250                 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1251                   dc390_MsgIn_set_async (pACB, pSRB);
1252                 else
1253                   dc390_MsgIn_set_sync (pACB, pSRB);
1254               }
1255
1256             // nothing has to be done
1257           case COMMAND_COMPLETE: break;
1258
1259             // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1260             // scsi command. Thanks, Gerard, for pointing it out.
1261           case SAVE_POINTERS:
1262             pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1263             break;
1264             // The device might want to restart transfer with a RESTORE
1265           case RESTORE_POINTERS:
1266             DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1267             dc390_restore_ptr (pACB, pSRB);
1268             break;
1269
1270             // reject unknown messages
1271           default: dc390_MsgIn_reject (pACB, pSRB);
1272           }
1273
1274         /* Clear counter and MsgIn state */
1275         pSRB->SRBState &= ~SRB_MSGIN;
1276         pACB->MsgLen = 0;
1277       }
1278
1279     *psstatus = SCSI_NOP0;
1280     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1281     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1282 }
1283
1284
1285 static void
1286 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1287 {
1288     struct scatterlist *psgl;
1289     unsigned long  lval;
1290     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1291
1292     if (pSRB == pACB->pTmpSRB)
1293     {
1294         if (pDCB)
1295                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1296         else
1297                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1298
1299         /* Try to recover - some broken disks react badly to tagged INQUIRY */
1300         if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1301                 pSRB = pDCB->pGoingSRB;
1302                 pDCB->pActiveSRB = pSRB;
1303         } else {
1304                 pSRB->pSRBDCB = pDCB;
1305                 dc390_EnableMsgOut_Abort(pACB, pSRB);
1306                 if (pDCB)
1307                         pDCB->DCBFlag |= ABORT_DEV;
1308                 return;
1309         }
1310     }
1311
1312     if( pSRB->SGIndex < pSRB->SGcount )
1313     {
1314         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1315         if( !pSRB->SGToBeXferLen )
1316         {
1317             psgl = pSRB->pSegmentList;
1318             pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1319             pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1320             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1321         }
1322         lval = pSRB->SGToBeXferLen;
1323         DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1324         DC390_write8 (CtcReg_Low, (u8) lval);
1325         lval >>= 8;
1326         DC390_write8 (CtcReg_Mid, (u8) lval);
1327         lval >>= 8;
1328         DC390_write8 (CtcReg_High, (u8) lval);
1329
1330         DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1331         DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1332
1333         //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1334         pSRB->SRBState = SRB_DATA_XFER;
1335
1336         DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1337
1338         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1339         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1340         //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1341         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1342     }
1343     else    /* xfer pad */
1344     {
1345         if( pSRB->SGcount )
1346         {
1347             pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1348             pSRB->SRBStatus |= OVER_RUN;
1349             DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1350         }
1351         DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1352         DC390_write8 (CtcReg_Low, 0);
1353         DC390_write8 (CtcReg_Mid, 0);
1354         DC390_write8 (CtcReg_High, 0);
1355
1356         pSRB->SRBState |= SRB_XFERPAD;
1357         DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1358 /*
1359         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1360         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1361 */
1362     }
1363 }
1364
1365
1366 static void
1367 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1368 {
1369     dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1370 }
1371
1372 static void
1373 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1374 {
1375     dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1376 }
1377
1378 static void
1379 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1380 {
1381     struct dc390_dcb*   pDCB;
1382     u8  i, cnt;
1383     u8     *ptr;
1384
1385     DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1386     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1387     if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1388     {
1389         cnt = (u8) pSRB->pcmd->cmd_len;
1390         ptr = (u8 *) pSRB->pcmd->cmnd;
1391         for(i=0; i < cnt; i++)
1392             DC390_write8 (ScsiFifo, *(ptr++));
1393     }
1394     else
1395     {
1396         DC390_write8 (ScsiFifo, REQUEST_SENSE);
1397         pDCB = pACB->pActiveDCB;
1398         DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1399         DC390_write8 (ScsiFifo, 0);
1400         DC390_write8 (ScsiFifo, 0);
1401         DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1402         DC390_write8 (ScsiFifo, 0);
1403         DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1404     }
1405     pSRB->SRBState = SRB_COMMAND;
1406     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1407 }
1408
1409 static void
1410 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1411 {
1412     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1413     pSRB->SRBState = SRB_STATUS;
1414     DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1415     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1416 }
1417
1418 static void
1419 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1420 {
1421     u8   bval, i, cnt;
1422     u8     *ptr;
1423     struct dc390_dcb*    pDCB;
1424
1425     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1426     pDCB = pACB->pActiveDCB;
1427     if( !(pSRB->SRBState & SRB_MSGOUT) )
1428     {
1429         cnt = pSRB->MsgCnt;
1430         if( cnt )
1431         {
1432             ptr = (u8 *) pSRB->MsgOutBuf;
1433             for(i=0; i < cnt; i++)
1434                 DC390_write8 (ScsiFifo, *(ptr++));
1435             pSRB->MsgCnt = 0;
1436             if( (pDCB->DCBFlag & ABORT_DEV_) &&
1437                 (pSRB->MsgOutBuf[0] == ABORT) )
1438                 pSRB->SRBState = SRB_ABORT_SENT;
1439         }
1440         else
1441         {
1442             bval = ABORT;       /* ??? MSG_NOP */
1443             if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1444                 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1445                 (pSRB->SRBFlag & AUTO_REQSENSE) )
1446             {
1447                 if( pDCB->SyncMode & SYNC_ENABLE )
1448                     goto  mop1;
1449             }
1450             DC390_write8 (ScsiFifo, bval);
1451         }
1452         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1453     }
1454     else
1455     {
1456 mop1:
1457         printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1458         DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1459         DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1460         DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1461         DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1462         if (pDCB->SyncOffset & 0x0f)
1463                     DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1464         else
1465                     DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1466         pSRB->SRBState |= DO_SYNC_NEGO;
1467         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1468     }
1469 }
1470
1471 static void
1472 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1473 {
1474     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1475     if( !(pSRB->SRBState & SRB_MSGIN) )
1476     {
1477         pSRB->SRBState &= ~SRB_DISCONNECT;
1478         pSRB->SRBState |= SRB_MSGIN;
1479     }
1480     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1481     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1482 }
1483
1484 static void
1485 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1486 {
1487 }
1488
1489 static void
1490 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1491 {
1492 }
1493
1494
1495 static void
1496 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1497 {
1498     u8  bval, i, cnt;
1499     struct dc390_dcb*   ptr;
1500
1501     if( !(pDCB->TargetLUN) )
1502     {
1503         if( !pACB->scan_devices )
1504         {
1505             ptr = pACB->pLinkDCB;
1506             cnt = pACB->DCBCnt;
1507             bval = pDCB->TargetID;
1508             for(i=0; i<cnt; i++)
1509             {
1510                 if( ptr->TargetID == bval )
1511                 {
1512                     ptr->SyncPeriod = pDCB->SyncPeriod;
1513                     ptr->SyncOffset = pDCB->SyncOffset;
1514                     ptr->CtrlR3 = pDCB->CtrlR3;
1515                     ptr->CtrlR4 = pDCB->CtrlR4;
1516                     ptr->SyncMode = pDCB->SyncMode;
1517                 }
1518                 ptr = ptr->pNextDCB;
1519             }
1520         }
1521     }
1522     return;
1523 }
1524
1525
1526 static void
1527 dc390_Disconnect( struct dc390_acb* pACB )
1528 {
1529     struct dc390_dcb *pDCB;
1530     struct dc390_srb *pSRB, *psrb;
1531     u8  i, cnt;
1532
1533     DEBUG0(printk(KERN_INFO "DISC,"));
1534
1535     if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1536     pACB->Connected = 0;
1537     pDCB = pACB->pActiveDCB;
1538     if (!pDCB)
1539      {
1540         DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1541                pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1542         mdelay(400);
1543         DC390_read8 (INT_Status);       /* Reset Pending INT */
1544         DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1545         return;
1546      }
1547     DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1548     pSRB = pDCB->pActiveSRB;
1549     pACB->pActiveDCB = NULL;
1550     pSRB->ScsiPhase = SCSI_NOP0;
1551     if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1552         pSRB->SRBState = 0;
1553     else if( pSRB->SRBState & SRB_ABORT_SENT )
1554     {
1555         pDCB->TagMask = 0;
1556         pDCB->DCBFlag = 0;
1557         cnt = pDCB->GoingSRBCnt;
1558         pDCB->GoingSRBCnt = 0;
1559         pSRB = pDCB->pGoingSRB;
1560         for( i=0; i < cnt; i++)
1561         {
1562             psrb = pSRB->pNextSRB;
1563             dc390_Free_insert (pACB, pSRB);
1564             pSRB = psrb;
1565         }
1566         pDCB->pGoingSRB = NULL;
1567     }
1568     else
1569     {
1570         if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1571            !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1572         {       /* Selection time out */
1573                 pSRB->TargetStatus = SCSI_STAT_SEL_TIMEOUT;
1574                 goto  disc1;
1575         }
1576         else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1577         {
1578 disc1:
1579             dc390_freetag (pDCB, pSRB);
1580             pDCB->pActiveSRB = NULL;
1581             pSRB->SRBState = SRB_FREE;
1582             dc390_SRBdone( pACB, pDCB, pSRB);
1583         }
1584     }
1585     pACB->MsgLen = 0;
1586 }
1587
1588
1589 static void
1590 dc390_Reselect( struct dc390_acb* pACB )
1591 {
1592     struct dc390_dcb*   pDCB;
1593     struct dc390_srb*   pSRB;
1594     u8  id, lun;
1595
1596     DEBUG0(printk(KERN_INFO "RSEL,"));
1597     pACB->Connected = 1;
1598     pDCB = pACB->pActiveDCB;
1599     if( pDCB )
1600     {   /* Arbitration lost but Reselection won */
1601         DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1602         pSRB = pDCB->pActiveSRB;
1603         if( !( pACB->scan_devices ) )
1604         {
1605             struct scsi_cmnd *pcmd = pSRB->pcmd;
1606             pcmd->resid = pcmd->request_bufflen;
1607             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1608             dc390_Going_remove(pDCB, pSRB);
1609             dc390_Free_insert(pACB, pSRB);
1610             pcmd->scsi_done (pcmd);
1611             DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1612         }
1613     }
1614     /* Get ID */
1615     lun = DC390_read8 (ScsiFifo);
1616     DEBUG0(printk ("Dev %02x,", lun));
1617     if (!(lun & (1 << pACB->pScsiHost->this_id)))
1618       printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1619     else
1620       lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1621     id = 0; while (lun >>= 1) id++;
1622     /* Get LUN */
1623     lun = DC390_read8 (ScsiFifo);
1624     if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1625     lun &= 7;
1626     DEBUG0(printk ("(%02i-%i),", id, lun));
1627     pDCB = dc390_findDCB (pACB, id, lun);
1628     if (!pDCB)
1629     {
1630         printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1631                     id, lun);
1632         return;
1633     }
1634     pACB->pActiveDCB = pDCB;
1635     /* TagQ: We expect a message soon, so never mind the exact SRB */
1636     if( pDCB->SyncMode & EN_TAG_QUEUEING )
1637     {
1638         pSRB = pACB->pTmpSRB;
1639         pDCB->pActiveSRB = pSRB;
1640     }
1641     else
1642     {
1643         pSRB = pDCB->pActiveSRB;
1644         if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1645         {
1646             pSRB= pACB->pTmpSRB;
1647             pSRB->SRBState = SRB_UNEXPECT_RESEL;
1648             printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1649                     id, lun);
1650             pDCB->pActiveSRB = pSRB;
1651             dc390_EnableMsgOut_Abort ( pACB, pSRB );
1652         }
1653         else
1654         {
1655             if( pDCB->DCBFlag & ABORT_DEV_ )
1656             {
1657                 pSRB->SRBState = SRB_ABORT_SENT;
1658                 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1659                         id, lun);
1660                 dc390_EnableMsgOut_Abort( pACB, pSRB );
1661             }
1662             else
1663                 pSRB->SRBState = SRB_DATA_XFER;
1664         }
1665     }
1666
1667     DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1668     pSRB->ScsiPhase = SCSI_NOP0;
1669     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1670     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1671     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1672     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1673     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1674     DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1675     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1676 }
1677
1678 static int __inline__
1679 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1680 {
1681         struct scsi_cmnd *pcmd;
1682
1683         pcmd = pSRB->pcmd;
1684
1685         REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1686                               pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1687
1688         pSRB->SRBFlag |= AUTO_REQSENSE;
1689         pSRB->SavedSGCount = pcmd->use_sg;
1690         pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1691         pSRB->AdaptStatus = 0;
1692         pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1693
1694         /* We are called from SRBdone, original PCI mapping has been removed
1695          * already, new one is set up from StartSCSI */
1696         pSRB->SGIndex = 0;
1697
1698         pSRB->TotalXferredLen = 0;
1699         pSRB->SGToBeXferLen = 0;
1700         return dc390_StartSCSI(pACB, pDCB, pSRB);
1701 }
1702
1703
1704 static void
1705 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1706 {
1707     u8 status;
1708     struct scsi_cmnd *pcmd;
1709
1710     pcmd = pSRB->pcmd;
1711     /* KG: Moved pci_unmap here */
1712     dc390_pci_unmap(pSRB);
1713
1714     status = pSRB->TargetStatus;
1715
1716     DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1717                 pSRB, pcmd->pid));
1718     if(pSRB->SRBFlag & AUTO_REQSENSE)
1719     {   /* Last command was a Request Sense */
1720         pSRB->SRBFlag &= ~AUTO_REQSENSE;
1721         pSRB->AdaptStatus = 0;
1722         pSRB->TargetStatus = CHECK_CONDITION << 1;
1723
1724         //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1725         if (status == (CHECK_CONDITION << 1))
1726             pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1727         else /* Retry */
1728         {
1729             if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1730             {
1731                 /* Don't retry on TEST_UNIT_READY */
1732                 pcmd->result = MK_RES_LNX(DRIVER_SENSE,DID_OK,0,CHECK_CONDITION);
1733                 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1734                        (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1735             } else {
1736                 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1737                 pcmd->use_sg = pSRB->SavedSGCount;
1738                 //pSRB->ScsiCmdLen       = (u8) (pSRB->Segment1[0] >> 8);
1739                 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1740                 pSRB->TotalXferredLen = 0;
1741                 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1742             }
1743         }
1744         goto cmd_done;
1745     }
1746     if( status )
1747     {
1748         if( status_byte(status) == CHECK_CONDITION )
1749         {
1750             if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1751                 SET_RES_DID(pcmd->result, DID_ERROR);
1752                 goto cmd_done;
1753             }
1754             return;
1755         }
1756         else if( status_byte(status) == QUEUE_FULL )
1757         {
1758             scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1759             pcmd->use_sg = pSRB->SavedSGCount;
1760             DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1761             pSRB->TotalXferredLen = 0;
1762             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1763         }
1764         else if(status == SCSI_STAT_SEL_TIMEOUT)
1765         {
1766             pSRB->AdaptStatus = H_SEL_TIMEOUT;
1767             pSRB->TargetStatus = 0;
1768             pcmd->result = MK_RES(0,DID_NO_CONNECT,0,0);
1769             /* Devices are removed below ... */
1770         }
1771         else if (status_byte(status) == BUSY &&
1772                  (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1773                  pACB->scan_devices)
1774         {
1775             pSRB->AdaptStatus = 0;
1776             pSRB->TargetStatus = status;
1777             pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1778         }
1779         else
1780         {   /* Another error */
1781             pSRB->TotalXferredLen = 0;
1782             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1783             goto cmd_done;
1784         }
1785     }
1786     else
1787     {   /*  Target status == 0 */
1788         status = pSRB->AdaptStatus;
1789         if(status & H_OVER_UNDER_RUN)
1790         {
1791             pSRB->TargetStatus = 0;
1792             SET_RES_DID(pcmd->result,DID_OK);
1793             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1794         }
1795         else if( pSRB->SRBStatus & PARITY_ERROR)
1796         {
1797             //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1798             SET_RES_DID(pcmd->result,DID_PARITY);
1799             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1800         }
1801         else                   /* No error */
1802         {
1803             pSRB->AdaptStatus = 0;
1804             pSRB->TargetStatus = 0;
1805             SET_RES_DID(pcmd->result,DID_OK);
1806         }
1807     }
1808
1809 cmd_done:
1810     pcmd->resid = pcmd->request_bufflen - pSRB->TotalXferredLen;
1811
1812     dc390_Going_remove (pDCB, pSRB);
1813     /* Add to free list */
1814     dc390_Free_insert (pACB, pSRB);
1815
1816     DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->pid));
1817     pcmd->scsi_done (pcmd);
1818
1819     return;
1820 }
1821
1822
1823 /* Remove all SRBs from Going list and inform midlevel */
1824 static void
1825 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1826 {
1827     struct dc390_dcb *pDCB, *pdcb;
1828     struct dc390_srb *psrb, *psrb2;
1829     int i;
1830     struct scsi_cmnd *pcmd;
1831
1832     pDCB = pACB->pLinkDCB;
1833     pdcb = pDCB;
1834     if (! pdcb) return;
1835     do
1836     {
1837         psrb = pdcb->pGoingSRB;
1838         for (i = 0; i < pdcb->GoingSRBCnt; i++)
1839         {
1840             psrb2 = psrb->pNextSRB;
1841             pcmd = psrb->pcmd;
1842             dc390_Free_insert (pACB, psrb);
1843             psrb  = psrb2;
1844         }
1845         pdcb->GoingSRBCnt = 0;
1846         pdcb->pGoingSRB = NULL;
1847         pdcb->TagMask = 0;
1848         pdcb = pdcb->pNextDCB;
1849     } while( pdcb != pDCB );
1850 }
1851
1852
1853 static void
1854 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1855 {
1856     //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1857     //udelay (250);
1858     //DC390_write8 (ScsiCmd, NOP_CMD);
1859
1860     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1861     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1862     DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1863     pACB->Connected = 0;
1864
1865     return;
1866 }
1867
1868 static void
1869 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1870 {
1871     printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1872     //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1873
1874     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1875     /* Unlock before ? */
1876     /* delay half a second */
1877     udelay (1000);
1878     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1879     pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1880                     + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1881     pACB->Connected = 0;
1882
1883     if( pACB->ACBFlag & RESET_DEV )
1884         pACB->ACBFlag |= RESET_DONE;
1885     else
1886     {   /* Reset was issued by sb else */
1887         pACB->ACBFlag |= RESET_DETECT;
1888
1889         dc390_ResetDevParam( pACB );
1890         dc390_DoingSRB_Done( pACB, NULL);
1891         //dc390_RecoverSRB( pACB );
1892         pACB->pActiveDCB = NULL;
1893         pACB->ACBFlag = 0;
1894     }
1895     return;
1896 }
1897
1898 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1899                 void (*done)(struct scsi_cmnd *))
1900 {
1901         struct scsi_device *sdev = cmd->device;
1902         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1903         struct dc390_dcb *dcb = sdev->hostdata;
1904         struct dc390_srb *srb;
1905
1906         if (sdev->queue_depth <= dcb->GoingSRBCnt)
1907                 goto device_busy;
1908         if (acb->pActiveDCB)
1909                 goto host_busy;
1910         if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1911                 goto host_busy;
1912
1913         srb = acb->pFreeSRB;
1914         if (unlikely(srb == NULL))
1915                 goto host_busy;
1916
1917         cmd->scsi_done = done;
1918         cmd->result = 0;
1919         acb->Cmds++;
1920
1921         acb->pFreeSRB = srb->pNextSRB;
1922         srb->pNextSRB = NULL;
1923
1924         srb->pSRBDCB = dcb;
1925         srb->pcmd = cmd;
1926         cmd->host_scribble = (char *)srb;
1927
1928         srb->SGIndex = 0;
1929         srb->AdaptStatus = 0;
1930         srb->TargetStatus = 0;
1931         srb->MsgCnt = 0;
1932
1933         srb->SRBStatus = 0;
1934         srb->SRBFlag = 0;
1935         srb->SRBState = 0;
1936         srb->TotalXferredLen = 0;
1937         srb->SGBusAddr = 0;
1938         srb->SGToBeXferLen = 0;
1939         srb->ScsiPhase = 0;
1940         srb->EndMessage = 0;
1941         srb->TagNumber = SCSI_NO_TAG;
1942
1943         if (dc390_StartSCSI(acb, dcb, srb)) {
1944                 dc390_Free_insert(acb, srb);
1945                 goto host_busy;
1946         }
1947
1948         dc390_Going_append(dcb, srb);
1949
1950         return 0;
1951
1952  host_busy:
1953         return SCSI_MLQUEUE_HOST_BUSY;
1954
1955  device_busy:
1956         return SCSI_MLQUEUE_DEVICE_BUSY;
1957 }
1958
1959 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1960 {
1961     struct pci_dev *pdev;
1962     u16 pstat;
1963
1964     if (!pDCB) pDCB = pACB->pActiveDCB;
1965     if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1966
1967     if (pSRB)
1968     {
1969         printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1970                 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1971                 pSRB->ScsiPhase);
1972         printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1973     }
1974     printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1975     printk ("DC390: Register dump: SCSI block:\n");
1976     printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1977     printk ("DC390:  %06x   %02x   %02x   %02x",
1978             DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1979             DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1980     printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
1981             DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1982             DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1983     DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1984     if (DC390_read8(Current_Fifo) & 0x1f)
1985       {
1986         printk ("DC390: FIFO:");
1987         while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1988         printk ("\n");
1989       }
1990     printk ("DC390: Register dump: DMA engine:\n");
1991     printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
1992     printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
1993             DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1994             DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1995             DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1996     DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1997
1998     pdev = pACB->pdev;
1999     pci_read_config_word(pdev, PCI_STATUS, &pstat);
2000     printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
2001     printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
2002 }
2003
2004
2005 static int DC390_abort(struct scsi_cmnd *cmd)
2006 {
2007         struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2008         struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
2009
2010         scmd_printk(KERN_WARNING, cmd,
2011                 "DC390: Abort command (pid %li)\n", cmd->pid);
2012
2013         /* abort() is too stupid for already sent commands at the moment.
2014          * If it's called we are in trouble anyway, so let's dump some info
2015          * into the syslog at least. (KG, 98/08/20,99/06/20) */
2016         dc390_dumpinfo(pACB, pDCB, NULL);
2017
2018         pDCB->DCBFlag |= ABORT_DEV_;
2019         printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->pid);
2020
2021         return FAILED;
2022 }
2023
2024
2025 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2026 {
2027     struct dc390_dcb *pDCB, *pdcb;
2028
2029     pDCB = pACB->pLinkDCB;
2030     if (! pDCB) return;
2031     pdcb = pDCB;
2032     do
2033     {
2034         pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2035         pDCB->SyncPeriod = 0;
2036         pDCB->SyncOffset = 0;
2037         pDCB->TagMask = 0;
2038         pDCB->CtrlR3 = FAST_CLK;
2039         pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2040         pDCB->CtrlR4 |= pACB->glitch_cfg;
2041         pDCB = pDCB->pNextDCB;
2042     }
2043     while( pdcb != pDCB );
2044     pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2045
2046 }
2047
2048 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2049 {
2050         struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2051         u8   bval;
2052
2053         spin_lock_irq(cmd->device->host->host_lock);
2054
2055         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2056         DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2057
2058         pACB->ACBFlag |= RESET_DEV;
2059         dc390_ResetSCSIBus(pACB);
2060
2061         dc390_ResetDevParam(pACB);
2062         mdelay(1);
2063         pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2064                 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2065
2066         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2067         DC390_read8(INT_Status);                /* Reset Pending INT */
2068
2069         dc390_DoingSRB_Done(pACB, cmd);
2070
2071         pACB->pActiveDCB = NULL;
2072         pACB->ACBFlag = 0;
2073
2074         bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2075         DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2076
2077         spin_unlock_irq(cmd->device->host->host_lock);
2078
2079         return SUCCESS;
2080 }
2081
2082 /**
2083  * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2084  * scsi device that we need to deal with.
2085  *
2086  * @scsi_device: The new scsi device that we need to handle.
2087  */
2088 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2089 {
2090         struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2091         struct dc390_dcb *pDCB, *pDCB2 = NULL;
2092         uint id = scsi_device->id;
2093         uint lun = scsi_device->lun;
2094
2095         pDCB = kmalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2096         if (!pDCB)
2097                 return -ENOMEM;
2098         memset(pDCB, 0, sizeof(struct dc390_dcb));
2099
2100         if (!pACB->DCBCnt++) {
2101                 pACB->pLinkDCB = pDCB;
2102                 pACB->pDCBRunRobin = pDCB;
2103         } else {
2104                 pACB->pLastDCB->pNextDCB = pDCB;
2105         }
2106
2107         pDCB->pNextDCB = pACB->pLinkDCB;
2108         pACB->pLastDCB = pDCB;
2109
2110         pDCB->pDCBACB = pACB;
2111         pDCB->TargetID = id;
2112         pDCB->TargetLUN = lun;
2113
2114         /*
2115          * Some values are for all LUNs: Copy them
2116          * In a clean way: We would have an own structure for a SCSI-ID
2117          */
2118         if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2119                 pDCB->DevMode = pDCB2->DevMode;
2120                 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2121                 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2122                 pDCB->SyncOffset = pDCB2->SyncOffset;
2123                 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2124
2125                 pDCB->CtrlR3 = pDCB2->CtrlR3;
2126                 pDCB->CtrlR4 = pDCB2->CtrlR4;
2127         } else {
2128                 u8 index = pACB->AdapterIndex;
2129                 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2130
2131                 pDCB->DevMode = prom->EE_MODE1;
2132                 pDCB->NegoPeriod =
2133                         (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2134                 pDCB->CtrlR3 = FAST_CLK;
2135                 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2136                 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2137                         pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2138         }
2139
2140         if (pDCB->DevMode & SYNC_NEGO_)
2141                 pDCB->SyncMode |= SYNC_ENABLE;
2142         else {
2143                 pDCB->SyncMode = 0;
2144                 pDCB->SyncOffset &= ~0x0f;
2145         }
2146
2147         pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2148         if (pDCB->DevMode & PARITY_CHK_)
2149                 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2150
2151         pACB->scan_devices = 1;
2152         scsi_device->hostdata = pDCB;
2153         return 0;
2154 }
2155
2156 /**
2157  * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2158  * device that is going away.
2159  *
2160  * @scsi_device: The scsi device that we need to remove.
2161  */
2162 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2163 {
2164         struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2165         struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2166         struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2167
2168         pACB->scan_devices = 0;
2169
2170         BUG_ON(pDCB->GoingSRBCnt > 1);
2171
2172         if (pDCB == pACB->pLinkDCB) {
2173                 if (pACB->pLastDCB == pDCB) {
2174                         pDCB->pNextDCB = NULL;
2175                         pACB->pLastDCB = NULL;
2176                 }
2177                 pACB->pLinkDCB = pDCB->pNextDCB;
2178         } else {
2179                 while (pPrevDCB->pNextDCB != pDCB)
2180                         pPrevDCB = pPrevDCB->pNextDCB;
2181                 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2182                 if (pDCB == pACB->pLastDCB)
2183                         pACB->pLastDCB = pPrevDCB;
2184         }
2185
2186         if (pDCB == pACB->pActiveDCB)
2187                 pACB->pActiveDCB = NULL;
2188         if (pDCB == pACB->pLinkDCB)
2189                 pACB->pLinkDCB = pDCB->pNextDCB;
2190         if (pDCB == pACB->pDCBRunRobin)
2191                 pACB->pDCBRunRobin = pDCB->pNextDCB;
2192         kfree(pDCB);
2193
2194         pACB->DCBCnt--;
2195 }
2196
2197 static int dc390_slave_configure(struct scsi_device *sdev)
2198 {
2199         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2200         struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2201
2202         acb->scan_devices = 0;
2203         if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2204                 dcb->SyncMode |= EN_TAG_QUEUEING;
2205                 scsi_activate_tcq(sdev, acb->TagMaxNum);
2206         }
2207
2208         return 0;
2209 }
2210
2211 static struct scsi_host_template driver_template = {
2212         .module                 = THIS_MODULE,
2213         .proc_name              = "tmscsim",
2214         .name                   = DC390_BANNER " V" DC390_VERSION,
2215         .slave_alloc            = dc390_slave_alloc,
2216         .slave_configure        = dc390_slave_configure,
2217         .slave_destroy          = dc390_slave_destroy,
2218         .queuecommand           = DC390_queuecommand,
2219         .eh_abort_handler       = DC390_abort,
2220         .eh_bus_reset_handler   = DC390_bus_reset,
2221         .can_queue              = 1,
2222         .this_id                = 7,
2223         .sg_tablesize           = SG_ALL,
2224         .cmd_per_lun            = 1,
2225         .use_clustering         = ENABLE_CLUSTERING,
2226         .max_sectors            = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2227 };
2228
2229 /***********************************************************************
2230  * Functions for access to DC390 EEPROM
2231  * and some to emulate it
2232  *
2233  **********************************************************************/
2234
2235 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2236 {
2237         u8 carryFlag = 1, j = 0x80, bval;
2238         int i;
2239
2240         for (i = 0; i < 9; i++) {
2241                 if (carryFlag) {
2242                         pci_write_config_byte(pdev, 0x80, 0x40);
2243                         bval = 0xc0;
2244                 } else
2245                         bval = 0x80;
2246
2247                 udelay(160);
2248                 pci_write_config_byte(pdev, 0x80, bval);
2249                 udelay(160);
2250                 pci_write_config_byte(pdev, 0x80, 0);
2251                 udelay(160);
2252
2253                 carryFlag = (cmd & j) ? 1 : 0;
2254                 j >>= 1;
2255         }
2256 }
2257
2258 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2259 {
2260         int i;
2261         u16 wval = 0;
2262         u8 bval;
2263
2264         for (i = 0; i < 16; i++) {
2265                 wval <<= 1;
2266
2267                 pci_write_config_byte(pdev, 0x80, 0x80);
2268                 udelay(160);
2269                 pci_write_config_byte(pdev, 0x80, 0x40);
2270                 udelay(160);
2271                 pci_read_config_byte(pdev, 0x00, &bval);
2272
2273                 if (bval == 0x22)
2274                         wval |= 1;
2275         }
2276
2277         return wval;
2278 }
2279
2280 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2281 {
2282         u8 cmd = EEPROM_READ, i;
2283
2284         for (i = 0; i < 0x40; i++) {
2285                 pci_write_config_byte(pdev, 0xc0, 0);
2286                 udelay(160);
2287
2288                 dc390_eeprom_prepare_read(pdev, cmd++);
2289                 *ptr++ = dc390_eeprom_get_data(pdev);
2290
2291                 pci_write_config_byte(pdev, 0x80, 0);
2292                 pci_write_config_byte(pdev, 0x80, 0);
2293                 udelay(160);
2294         }
2295 }
2296
2297 /* Override EEprom values with explicitly set values */
2298 static void __devinit dc390_eeprom_override(u8 index)
2299 {
2300         u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2301
2302         /* Adapter Settings */
2303         if (tmscsim[0] != -2)
2304                 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2305         if (tmscsim[3] != -2)
2306                 ptr[EE_MODE2] = (u8)tmscsim[3];
2307         if (tmscsim[5] != -2)
2308                 ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2309         if (tmscsim[4] != -2)
2310                 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2311
2312         /* Device Settings */
2313         for (id = 0; id < MAX_SCSI_ID; id++) {
2314                 if (tmscsim[2] != -2)
2315                         ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2316                 if (tmscsim[1] != -2)
2317                         ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2318         }
2319 }
2320
2321 static int __devinitdata tmscsim_def[] = {
2322         7,
2323         0 /* 10MHz */,
2324         PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2325         MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2326         3 /* 16 Tags per LUN */,
2327         1 /* s delay after Reset */,
2328 };
2329
2330 /* Copy defaults over set values where missing */
2331 static void __devinit dc390_fill_with_defaults (void)
2332 {
2333         int i;
2334
2335         for (i = 0; i < 6; i++) {
2336                 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2337                         tmscsim[i] = tmscsim_def[i];
2338         }
2339
2340         /* Sanity checks */
2341         if (tmscsim[0] > 7)
2342                 tmscsim[0] = 7;
2343         if (tmscsim[1] > 7)
2344                 tmscsim[1] = 4;
2345         if (tmscsim[4] > 5)
2346                 tmscsim[4] = 4;
2347         if (tmscsim[5] > 180)
2348                 tmscsim[5] = 180;
2349 }
2350
2351 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2352 {
2353         u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2354         u8 EEbuf[128];
2355         u16 *ptr = (u16 *)EEbuf, wval = 0;
2356         int i;
2357
2358         dc390_read_eeprom(pdev, ptr);
2359         memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2360         memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2361                &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2362
2363         dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2364
2365         for (i = 0; i < 0x40; i++, ptr++)
2366                 wval += *ptr;
2367
2368         /* no Tekram EEprom found */
2369         if (wval != 0x1234) {
2370                 int speed;
2371
2372                 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2373
2374                 /*
2375                  * XXX(hch): bogus, because we might have tekram and
2376                  *           non-tekram hbas in a single machine.
2377                  */
2378                 dc390_fill_with_defaults();
2379
2380                 speed = dc390_clock_speed[tmscsim[1]];
2381                 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2382                        "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2383                        tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2384                        (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2385         }
2386 }
2387
2388 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2389 {
2390         struct Scsi_Host *shost = pACB->pScsiHost;
2391         u8 dstate;
2392
2393         /* Disable SCSI bus reset interrupt */
2394         DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2395
2396         if (pACB->Gmode2 & RST_SCSI_BUS) {
2397                 dc390_ResetSCSIBus(pACB);
2398                 udelay(1000);
2399                 shost->last_reset = jiffies + HZ/2 +
2400                         HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2401         }
2402
2403         pACB->ACBFlag = 0;
2404
2405         /* Reset Pending INT */
2406         DC390_read8(INT_Status);
2407
2408         /* 250ms selection timeout */
2409         DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2410
2411         /* Conversion factor = 0 , 40MHz clock */
2412         DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2413
2414         /* NOP cmd - clear command register */
2415         DC390_write8(ScsiCmd, NOP_CMD);
2416
2417         /* Enable Feature and SCSI-2 */
2418         DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2419
2420         /* Fast clock */
2421         DC390_write8(CtrlReg3, FAST_CLK);
2422
2423         /* Negation */
2424         DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2425                 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2426                  NEGATE_REQACKDATA : 0);
2427
2428         /* Clear Transfer Count High: ID */
2429         DC390_write8(CtcReg_High, 0);
2430         DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2431         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2432         DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2433
2434         dstate = DC390_read8(DMA_Status);
2435         DC390_write8(DMA_Status, dstate);
2436 }
2437
2438 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2439                                     const struct pci_device_id *id)
2440 {
2441         struct dc390_acb *pACB;
2442         struct Scsi_Host *shost;
2443         unsigned long io_port;
2444         int error = -ENODEV, i;
2445
2446         if (pci_enable_device(pdev))
2447                 goto out;
2448
2449         pci_set_master(pdev);
2450
2451         error = -ENOMEM;
2452         if (disable_clustering)
2453                 driver_template.use_clustering = DISABLE_CLUSTERING;
2454         shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2455         if (!shost)
2456                 goto out_disable_device;
2457
2458         pACB = (struct dc390_acb *)shost->hostdata;
2459         memset(pACB, 0, sizeof(struct dc390_acb));
2460
2461         dc390_check_eeprom(pdev, dc390_adapterCnt);
2462         dc390_eeprom_override(dc390_adapterCnt);
2463
2464         io_port = pci_resource_start(pdev, 0);
2465
2466         shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2467         shost->io_port = io_port;
2468         shost->n_io_port = 0x80;
2469         shost->irq = pdev->irq;
2470         shost->base = io_port;
2471         shost->unique_id = io_port;
2472         shost->last_reset = jiffies;
2473
2474         pACB->pScsiHost = shost;
2475         pACB->IOPortBase = (u16) io_port;
2476         pACB->IRQLevel = pdev->irq;
2477
2478         shost->max_id = 8;
2479
2480         if (shost->max_id - 1 ==
2481             dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2482                 shost->max_id--;
2483
2484         if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2485                 shost->max_lun = 8;
2486         else
2487                 shost->max_lun = 1;
2488
2489         pACB->pFreeSRB = pACB->SRB_array;
2490         pACB->SRBCount = MAX_SRB_CNT;
2491         pACB->AdapterIndex = dc390_adapterCnt;
2492         pACB->TagMaxNum =
2493                 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2494         pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2495
2496         for (i = 0; i < pACB->SRBCount-1; i++)
2497                 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2498         pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2499         pACB->pTmpSRB = &pACB->TmpSRB;
2500
2501         pACB->sel_timeout = SEL_TIMEOUT;
2502         pACB->glitch_cfg = EATER_25NS;
2503         pACB->pdev = pdev;
2504
2505         if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2506                 printk(KERN_ERR "DC390: register IO ports error!\n");
2507                 goto out_host_put;
2508         }
2509
2510         /* Reset Pending INT */
2511         DC390_read8_(INT_Status, io_port);
2512
2513         if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2514                                 "tmscsim", pACB)) {
2515                 printk(KERN_ERR "DC390: register IRQ error!\n");
2516                 goto out_release_region;
2517         }
2518
2519         dc390_init_hw(pACB, dc390_adapterCnt);
2520
2521         dc390_adapterCnt++;
2522
2523         pci_set_drvdata(pdev, shost);
2524
2525         error = scsi_add_host(shost, &pdev->dev);
2526         if (error)
2527                 goto out_free_irq;
2528         scsi_scan_host(shost);
2529         return 0;
2530
2531  out_free_irq:
2532         free_irq(pdev->irq, pACB);
2533  out_release_region:
2534         release_region(io_port, shost->n_io_port);
2535  out_host_put:
2536         scsi_host_put(shost);
2537  out_disable_device:
2538         pci_disable_device(pdev);
2539  out:
2540         return error;
2541 }
2542
2543 /**
2544  * dc390_remove_one - Called to remove a single instance of the adapter.
2545  *
2546  * @dev: The PCI device to remove.
2547  */
2548 static void __devexit dc390_remove_one(struct pci_dev *dev)
2549 {
2550         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2551         unsigned long iflags;
2552         struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2553         u8 bval;
2554
2555         scsi_remove_host(scsi_host);
2556
2557         spin_lock_irqsave(scsi_host->host_lock, iflags);
2558         pACB->ACBFlag = RESET_DEV;
2559         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2560         DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2561         if (pACB->Gmode2 & RST_SCSI_BUS)
2562                 dc390_ResetSCSIBus(pACB);
2563         spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2564
2565         free_irq(scsi_host->irq, pACB);
2566         release_region(scsi_host->io_port, scsi_host->n_io_port);
2567
2568         pci_disable_device(dev);
2569         scsi_host_put(scsi_host);
2570         pci_set_drvdata(dev, NULL);
2571 }
2572
2573 static struct pci_device_id tmscsim_pci_tbl[] = {
2574         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2575                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2576         { }
2577 };
2578 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2579
2580 static struct pci_driver dc390_driver = {
2581         .name           = "tmscsim",
2582         .id_table       = tmscsim_pci_tbl,
2583         .probe          = dc390_probe_one,
2584         .remove         = __devexit_p(dc390_remove_one),
2585 };
2586
2587 static int __init dc390_module_init(void)
2588 {
2589         if (!disable_clustering)
2590                 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
2591                        "\twith \"disable_clustering=1\" and report to maintainers\n");
2592
2593         if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2594                 tmscsim[0] = 7;
2595                 tmscsim[1] = 4;
2596                 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2597                 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2598                 tmscsim[4] = 2;
2599                 tmscsim[5] = 10;
2600                 printk (KERN_INFO "DC390: Using safe settings.\n");
2601         }
2602
2603         return pci_register_driver(&dc390_driver);
2604 }
2605
2606 static void __exit dc390_module_exit(void)
2607 {
2608         pci_unregister_driver(&dc390_driver);
2609 }
2610
2611 module_init(dc390_module_init);
2612 module_exit(dc390_module_exit);
2613
2614 #ifndef MODULE
2615 static int __init dc390_setup (char *str)
2616 {
2617         int ints[8],i, im;
2618
2619         get_options(str, ARRAY_SIZE(ints), ints);
2620         im = ints[0];
2621
2622         if (im > 6) {
2623                 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2624                 im = 6;
2625         }
2626
2627         for (i = 0; i < im; i++)
2628                 tmscsim[i] = ints[i+1];
2629         /* dc390_checkparams (); */
2630         return 1;
2631 }
2632
2633 __setup("tmscsim=", dc390_setup);
2634 #endif