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 void inline dc390_start_segment(struct dc390_srb* pSRB)
 355 {
 356         struct scatterlist *psgl = pSRB->pSegmentList;
 357
 358         /* start new sg segment */
 359         pSRB->SGBusAddr = sg_dma_address(psgl);
 360         pSRB->SGToBeXferLen = sg_dma_len(psgl);
 361 }
 362
 363 static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
 364 {
 365         unsigned long xfer = pSRB->SGToBeXferLen - residue;
 366
 367         /* xfer more bytes transferred */
 368         pSRB->SGBusAddr += xfer;
 369         pSRB->TotalXferredLen += xfer;
 370         pSRB->SGToBeXferLen = residue;
 371
 372         return xfer;
 373 }
 374
 375 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 376 {
 377    struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 378    while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 379      {
 380         pDCB = pDCB->pNextDCB;
 381         if (pDCB == pACB->pLinkDCB)
 382              return NULL;
 383      }
 384    DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 385                       pDCB, pDCB->TargetID, pDCB->TargetLUN));
 386    return pDCB;
 387 }
 388
 389 /* Insert SRB oin top of free list */
 390 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 391 {
 392     DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 393     pSRB->pNextSRB = pACB->pFreeSRB;
 394     pACB->pFreeSRB = pSRB;
 395 }
 396
 397 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 398 {
 399     pDCB->GoingSRBCnt++;
 400     DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 401     /* Append to the list of Going commands */
 402     if( pDCB->pGoingSRB )
 403         pDCB->pGoingLast->pNextSRB = pSRB;
 404     else
 405         pDCB->pGoingSRB = pSRB;
 406
 407     pDCB->pGoingLast = pSRB;
 408     /* No next one in sent list */
 409     pSRB->pNextSRB = NULL;
 410 }
 411
 412 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 413 {
 414         DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 415    if (pSRB == pDCB->pGoingSRB)
 416         pDCB->pGoingSRB = pSRB->pNextSRB;
 417    else
 418      {
 419         struct dc390_srb* psrb = pDCB->pGoingSRB;
 420         while (psrb && psrb->pNextSRB != pSRB)
 421           psrb = psrb->pNextSRB;
 422         if (!psrb)
 423           { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 424         psrb->pNextSRB = pSRB->pNextSRB;
 425         if (pSRB == pDCB->pGoingLast)
 426           pDCB->pGoingLast = psrb;
 427      }
 428    pDCB->GoingSRBCnt--;
 429 }
 430
 431 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 432 {
 433         sg_init_one(sg, addr, length);
 434         return sg;
 435 }
 436
 437 /* Create pci mapping */
 438 static int dc390_pci_map (struct dc390_srb* pSRB)
 439 {
 440         int error = 0;
 441         struct scsi_cmnd *pcmd = pSRB->pcmd;
 442         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 443         dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 444
 445         /* Map sense buffer */
 446         if (pSRB->SRBFlag & AUTO_REQSENSE) {
 447                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
 448                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 449                                                      DMA_FROM_DEVICE);
 450                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 451
 452                 /* TODO: error handling */
 453                 if (pSRB->SGcount != 1)
 454                         error = 1;
 455                 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __func__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 456         /* Map SG list */
 457         } else if (scsi_sg_count(pcmd)) {
 458                 int nseg;
 459
 460                 nseg = scsi_dma_map(pcmd);
 461
 462                 pSRB->pSegmentList      = scsi_sglist(pcmd);
 463                 pSRB->SGcount           = nseg;
 464
 465                 /* TODO: error handling */
 466                 if (nseg < 0)
 467                         error = 1;
 468                 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 469                               __func__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
 470         /* Map single segment */
 471         } else
 472                 pSRB->SGcount = 0;
 473
 474         return error;
 475 }
 476
 477 /* Remove pci mapping */
 478 static void dc390_pci_unmap (struct dc390_srb* pSRB)
 479 {
 480         struct scsi_cmnd *pcmd = pSRB->pcmd;
 481         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 482         DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 483
 484         if (pSRB->SRBFlag) {
 485                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 486                 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __func__, cmdp->saved_dma_handle));
 487         } else {
 488                 scsi_dma_unmap(pcmd);
 489                 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
 490                               __func__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
 491         }
 492 }
 493
 494 static void __inline__
 495 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 496 {
 497         if (pSRB->TagNumber != SCSI_NO_TAG) {
 498                 pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 499                 pSRB->TagNumber = SCSI_NO_TAG;
 500         }
 501 }
 502
 503
 504 static int
 505 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 506 {
 507     struct scsi_cmnd *scmd = pSRB->pcmd;
 508     struct scsi_device *sdev = scmd->device;
 509     u8 cmd, disc_allowed, try_sync_nego;
 510     char tag[2];
 511
 512     pSRB->ScsiPhase = SCSI_NOP0;
 513
 514     if (pACB->Connected)
 515     {
 516         // Should not happen normally
 517         printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 518                 pSRB->SRBState, pSRB->SRBFlag);
 519         pSRB->SRBState = SRB_READY;
 520         pACB->SelConn++;
 521         return 1;
 522     }
 523     if (time_before (jiffies, pACB->pScsiHost->last_reset))
 524     {
 525         DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 526         return 1;
 527     }
 528     /* KG: Moved pci mapping here */
 529     dc390_pci_map(pSRB);
 530     /* TODO: error handling */
 531     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 532     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 533     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 534     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 535     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 536     DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 537     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 538     DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 539             scmd->cmnd[0], pDCB->SyncMode));
 540
 541     /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 542      * Contingent Allegiance Condition (6.6), where no tags should be used.
 543      * All other have to be allowed to disconnect to prevent Incorrect
 544      * Initiator Connection (6.8.2/6.5.2) */
 545     /* Changed KG, 99/06/06 */
 546     if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 547         disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 548     else
 549         disc_allowed = 0;
 550
 551     if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 552         (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 553           !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 554       try_sync_nego = 1;
 555     else
 556       try_sync_nego = 0;
 557
 558     pSRB->MsgCnt = 0;
 559     cmd = SEL_W_ATN;
 560     DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 561     /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 562     if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 563         DC390_write8(ScsiFifo, tag[0]);
 564         pDCB->TagMask |= 1 << tag[1];
 565         pSRB->TagNumber = tag[1];
 566         DC390_write8(ScsiFifo, tag[1]);
 567         DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->serial_number, pSRB, tag[1]));
 568         cmd = SEL_W_ATN3;
 569     } else {
 570         /* No TagQ */
 571 //no_tag:
 572         DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->serial_number, pSRB));
 573     }
 574
 575     pSRB->SRBState = SRB_START_;
 576
 577     if (try_sync_nego)
 578       {
 579         u8 Sync_Off = pDCB->SyncOffset;
 580         DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 581         pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 582         pSRB->MsgOutBuf[1] = 3;
 583         pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 584         pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 585         if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 586         pSRB->MsgOutBuf[4] = Sync_Off;
 587         pSRB->MsgCnt = 5;
 588         //pSRB->SRBState = SRB_MSGOUT_;
 589         pSRB->SRBState |= DO_SYNC_NEGO;
 590         cmd = SEL_W_ATN_STOP;
 591       }
 592
 593     /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 594     if (cmd != SEL_W_ATN_STOP)
 595       {
 596         if( pSRB->SRBFlag & AUTO_REQSENSE )
 597           {
 598             DC390_write8 (ScsiFifo, REQUEST_SENSE);
 599             DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 600             DC390_write8 (ScsiFifo, 0);
 601             DC390_write8 (ScsiFifo, 0);
 602             DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
 603             DC390_write8 (ScsiFifo, 0);
 604             DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 605           }
 606         else    /* write cmnd to bus */
 607           {
 608             u8 *ptr; u8 i;
 609             ptr = (u8 *)scmd->cmnd;
 610             for (i = 0; i < scmd->cmd_len; i++)
 611               DC390_write8 (ScsiFifo, *(ptr++));
 612           }
 613       }
 614     DEBUG0(if (pACB->pActiveDCB)        \
 615            printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 616     DEBUG0(if (pDCB->pActiveSRB)        \
 617            printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 618     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 619     if (DC390_read8 (Scsi_Status) & INTERRUPT)
 620     {
 621         dc390_freetag (pDCB, pSRB);
 622         DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
 623                 scmd->serial_number, scmd->device->id, scmd->device->lun));
 624         pSRB->SRBState = SRB_READY;
 625         //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 626         pACB->SelLost++;
 627         return 1;
 628     }
 629     DC390_write8 (ScsiCmd, cmd);
 630     pACB->pActiveDCB = pDCB;
 631     pDCB->pActiveSRB = pSRB;
 632     pACB->Connected = 1;
 633     pSRB->ScsiPhase = SCSI_NOP1;
 634     return 0;
 635 }
 636
 637
 638 static void __inline__
 639 dc390_InvalidCmd(struct dc390_acb* pACB)
 640 {
 641         if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 642                 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 643 }
 644
 645
 646 static irqreturn_t __inline__
 647 DC390_Interrupt(void *dev_id)
 648 {
 649     struct dc390_acb *pACB = dev_id;
 650     struct dc390_dcb *pDCB;
 651     struct dc390_srb *pSRB;
 652     u8  sstatus=0;
 653     u8  phase;
 654     void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 655     u8  istate, istatus;
 656
 657     sstatus = DC390_read8 (Scsi_Status);
 658     if( !(sstatus & INTERRUPT) )
 659         return IRQ_NONE;
 660
 661     DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 662
 663     //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 664     //dstatus = DC390_read8 (DMA_Status);
 665     //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 666
 667     spin_lock_irq(pACB->pScsiHost->host_lock);
 668
 669     istate = DC390_read8 (Intern_State);
 670     istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 671
 672     DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 673     dc390_laststatus &= ~0x00ffffff;
 674     dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 675
 676     if (sstatus & ILLEGAL_OP_ERR)
 677     {
 678         printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 679         dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 680     }
 681
 682     else if (istatus &  INVALID_CMD)
 683     {
 684         printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 685         dc390_InvalidCmd( pACB );
 686         goto unlock;
 687     }
 688
 689     if (istatus &  SCSI_RESET)
 690     {
 691         dc390_ScsiRstDetect( pACB );
 692         goto unlock;
 693     }
 694
 695     if (istatus &  DISCONNECTED)
 696     {
 697         dc390_Disconnect( pACB );
 698         goto unlock;
 699     }
 700
 701     if (istatus &  RESELECTED)
 702     {
 703         dc390_Reselect( pACB );
 704         goto unlock;
 705     }
 706
 707     else if (istatus & (SELECTED | SEL_ATTENTION))
 708     {
 709         printk (KERN_ERR "DC390: Target mode not supported!\n");
 710         goto unlock;
 711     }
 712
 713     if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 714     {
 715         pDCB = pACB->pActiveDCB;
 716         if (!pDCB)
 717         {
 718                 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 719                 goto unlock;
 720         }
 721         pSRB = pDCB->pActiveSRB;
 722         if( pDCB->DCBFlag & ABORT_DEV_ )
 723           dc390_EnableMsgOut_Abort (pACB, pSRB);
 724
 725         phase = pSRB->ScsiPhase;
 726         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 727         stateV = (void *) dc390_phase0[phase];
 728         ( *stateV )( pACB, pSRB, &sstatus );
 729
 730         pSRB->ScsiPhase = sstatus & 7;
 731         phase = (u8) sstatus & 7;
 732         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 733         stateV = (void *) dc390_phase1[phase];
 734         ( *stateV )( pACB, pSRB, &sstatus );
 735     }
 736
 737  unlock:
 738     spin_unlock_irq(pACB->pScsiHost->host_lock);
 739     return IRQ_HANDLED;
 740 }
 741
 742 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
 743 {
 744     irqreturn_t ret;
 745     DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 746     /* Locking is done in DC390_Interrupt */
 747     ret = DC390_Interrupt(dev_id);
 748     DEBUG1(printk (".. IRQ returned\n"));
 749     return ret;
 750 }
 751
 752 static void
 753 dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 754 {
 755     u8   sstatus;
 756     u32  ResidCnt;
 757     u8   dstate = 0;
 758
 759     sstatus = *psstatus;
 760
 761     if( !(pSRB->SRBState & SRB_XFERPAD) )
 762     {
 763         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 764             pSRB->SRBStatus |= PARITY_ERROR;
 765
 766         if( sstatus & COUNT_2_ZERO )
 767         {
 768             unsigned long timeout = jiffies + HZ;
 769
 770             /* Function called from the ISR with the host_lock held and interrupts disabled */
 771             if (pSRB->SGToBeXferLen)
 772                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 773                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 774                     udelay(50);
 775                     spin_lock_irq(pACB->pScsiHost->host_lock);
 776                 }
 777             if (!time_before(jiffies, timeout))
 778                 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 779                         DC390_read32 (DMA_Wk_ByteCntr));
 780             dc390_laststatus &= ~0xff000000;
 781             dc390_laststatus |= dstate << 24;
 782             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 783             pSRB->SGIndex++;
 784             if( pSRB->SGIndex < pSRB->SGcount )
 785             {
 786                 pSRB->pSegmentList++;
 787
 788                 dc390_start_segment(pSRB);
 789             }
 790             else
 791                 pSRB->SGToBeXferLen = 0;
 792         }
 793         else
 794         {
 795             ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
 796                     (((u32) DC390_read8 (CtcReg_High) << 16) |
 797                      ((u32) DC390_read8 (CtcReg_Mid) << 8) |
 798                      (u32) DC390_read8 (CtcReg_Low));
 799
 800             dc390_advance_segment(pSRB, ResidCnt);
 801         }
 802     }
 803     if ((*psstatus & 7) != SCSI_DATA_OUT)
 804     {
 805             DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
 806             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 807     }
 808 }
 809
 810 static void
 811 dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 812 {
 813     u8   sstatus, residual, bval;
 814     u32  ResidCnt, i;
 815     unsigned long   xferCnt;
 816
 817     sstatus = *psstatus;
 818
 819     if( !(pSRB->SRBState & SRB_XFERPAD) )
 820     {
 821         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 822             pSRB->SRBStatus |= PARITY_ERROR;
 823
 824         if( sstatus & COUNT_2_ZERO )
 825         {
 826             int dstate = 0;
 827             unsigned long timeout = jiffies + HZ;
 828
 829             /* Function called from the ISR with the host_lock held and interrupts disabled */
 830             if (pSRB->SGToBeXferLen)
 831                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 832                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 833                     udelay(50);
 834                     spin_lock_irq(pACB->pScsiHost->host_lock);
 835                 }
 836             if (!time_before(jiffies, timeout)) {
 837                 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 838                         DC390_read32 (DMA_Wk_ByteCntr));
 839                 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 840             }
 841             dc390_laststatus &= ~0xff000000;
 842             dc390_laststatus |= dstate << 24;
 843             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 844                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 845                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
 846             DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
 847
 848             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 849
 850             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 851             pSRB->SGIndex++;
 852             if( pSRB->SGIndex < pSRB->SGcount )
 853             {
 854                 pSRB->pSegmentList++;
 855
 856                 dc390_start_segment(pSRB);
 857             }
 858             else
 859                 pSRB->SGToBeXferLen = 0;
 860         }
 861         else    /* phase changed */
 862         {
 863             residual = 0;
 864             bval = DC390_read8 (Current_Fifo);
 865             while( bval & 0x1f )
 866             {
 867                 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 868                 if( (bval & 0x1f) == 1 )
 869                 {
 870                     for(i=0; i < 0x100; i++)
 871                     {
 872                         bval = DC390_read8 (Current_Fifo);
 873                         if( !(bval & 0x1f) )
 874                             goto din_1;
 875                         else if( i == 0x0ff )
 876                         {
 877                             residual = 1;   /* ;1 residual byte */
 878                             goto din_1;
 879                         }
 880                     }
 881                 }
 882                 else
 883                     bval = DC390_read8 (Current_Fifo);
 884             }
 885 din_1:
 886             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 887             for (i = 0xa000; i; i--)
 888             {
 889                 bval = DC390_read8 (DMA_Status);
 890                 if (bval & BLAST_COMPLETE)
 891                     break;
 892             }
 893             /* It seems a DMA Blast abort isn't that bad ... */
 894             if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 895             //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 896             dc390_laststatus &= ~0xff000000;
 897             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) << 16) |
 901                         ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
 902                     (u32) DC390_read8 (CtcReg_Low);
 903
 904             xferCnt = dc390_advance_segment(pSRB, ResidCnt);
 905
 906             if (residual) {
 907                 size_t count = 1;
 908                 size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
 909                 unsigned long flags;
 910                 u8 *ptr;
 911
 912                 bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 913
 914                 local_irq_save(flags);
 915                 ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
 916                 if (likely(ptr)) {
 917                         *(ptr + offset) = bval;
 918                         scsi_kunmap_atomic_sg(ptr);
 919                 }
 920                 local_irq_restore(flags);
 921                 WARN_ON(!ptr);
 922
 923                 /* 1 more byte read */
 924                 xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
 925             }
 926             DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
 927                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
 928         }
 929     }
 930     if ((*psstatus & 7) != SCSI_DATA_IN)
 931     {
 932             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 933             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 934     }
 935 }
 936
 937 static void
 938 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 939 {
 940 }
 941
 942 static void
 943 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 944 {
 945
 946     pSRB->TargetStatus = DC390_read8 (ScsiFifo);
 947     //udelay (1);
 948     pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
 949
 950     *psstatus = SCSI_NOP0;
 951     pSRB->SRBState = SRB_COMPLETED;
 952     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
 953 }
 954
 955 static void
 956 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 957 {
 958     if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
 959         *psstatus = SCSI_NOP0;
 960     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 961 }
 962
 963
 964 static void __inline__
 965 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
 966 {
 967   DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 968   DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 969   DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 970   DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 971   dc390_SetXferRate (pACB, pDCB);
 972 }
 973
 974
 975 #ifdef DC390_DEBUG0
 976 static void
 977 dc390_printMsg (u8 *MsgBuf, u8 len)
 978 {
 979   int i;
 980   printk (" %02x", MsgBuf[0]);
 981   for (i = 1; i < len; i++)
 982     printk (" %02x", MsgBuf[i]);
 983   printk ("\n");
 984 }
 985 #endif
 986
 987 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
 988
 989 /* reject_msg */
 990 static void __inline__
 991 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 992 {
 993   pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
 994   pSRB->MsgCnt = 1;
 995   DC390_ENABLE_MSGOUT;
 996   DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
 997 }
 998
 999 /* abort command */
1000 static void
1001 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1002 {
1003     pSRB->MsgOutBuf[0] = ABORT;
1004     pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1005     pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1006 }
1007
1008 static struct dc390_srb*
1009 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1010 {
1011   struct dc390_srb* pSRB = pDCB->pGoingSRB;
1012
1013   if (pSRB)
1014     {
1015         struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1016         pSRB = (struct dc390_srb *)scmd->host_scribble;
1017
1018         if (pDCB->DCBFlag & ABORT_DEV_)
1019         {
1020           pSRB->SRBState = SRB_ABORT_SENT;
1021           dc390_EnableMsgOut_Abort( pACB, pSRB );
1022         }
1023
1024         if (!(pSRB->SRBState & SRB_DISCONNECT))
1025                 goto mingx0;
1026
1027         pDCB->pActiveSRB = pSRB;
1028         pSRB->SRBState = SRB_DATA_XFER;
1029     }
1030   else
1031     {
1032     mingx0:
1033       pSRB = pACB->pTmpSRB;
1034       pSRB->SRBState = SRB_UNEXPECT_RESEL;
1035       pDCB->pActiveSRB = pSRB;
1036       pSRB->MsgOutBuf[0] = ABORT_TAG;
1037       pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1038     }
1039   return pSRB;
1040 }
1041
1042
1043 /* set async transfer mode */
1044 static void
1045 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1046 {
1047   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1048   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1049     printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1050   pSRB->SRBState &= ~DO_SYNC_NEGO;
1051   pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1052   pDCB->SyncPeriod = 0;
1053   pDCB->SyncOffset = 0;
1054   //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1055   pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1056   pDCB->CtrlR4 &= 0x3f;
1057   pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1058   dc390_reprog (pACB, pDCB);
1059 }
1060
1061 /* set sync transfer mode */
1062 static void
1063 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1064 {
1065   u8 bval;
1066   u16 wval, wval1;
1067   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1068   u8 oldsyncperiod = pDCB->SyncPeriod;
1069   u8 oldsyncoffset = pDCB->SyncOffset;
1070
1071   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1072     {
1073       printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1074               pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1075
1076       /* reject */
1077       //dc390_MsgIn_reject (pACB, pSRB);
1078       //return dc390_MsgIn_set_async (pACB, pSRB);
1079
1080       /* Reply with corrected SDTR Message */
1081       if (pSRB->MsgInBuf[4] > 15)
1082         {
1083           printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1084           pSRB->MsgInBuf[4] = 15;
1085         }
1086       if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1087         {
1088           printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1089           pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1090         }
1091       memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1092       pSRB->MsgCnt = 5;
1093       DC390_ENABLE_MSGOUT;
1094     }
1095
1096   pSRB->SRBState &= ~DO_SYNC_NEGO;
1097   pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1098   pDCB->SyncOffset &= 0x0f0;
1099   pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1100   pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1101
1102   wval = (u16) pSRB->MsgInBuf[3];
1103   wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1104   if( (wval1 * 25) != wval) wval1++;
1105   bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1106
1107   pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1108   if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1109     pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1110   else
1111     pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1112   if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1113
1114   if (wval1 >= 8)
1115     {
1116       wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1117       bval = FAST_CLK;          /* fast clock / normal scsi */
1118       pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1119     }
1120
1121   pDCB->CtrlR3 = bval;
1122   pDCB->SyncPeriod = (u8)wval1;
1123
1124   if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1125     {
1126       if (! (bval & FAST_SCSI)) wval1++;
1127       printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1128               40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1129     }
1130
1131   dc390_reprog (pACB, pDCB);
1132 }
1133
1134
1135 /* handle RESTORE_PTR */
1136 /* This doesn't look very healthy... to-be-fixed */
1137 static void
1138 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1139 {
1140     struct scsi_cmnd *pcmd = pSRB->pcmd;
1141     struct scatterlist *psgl;
1142     pSRB->TotalXferredLen = 0;
1143     pSRB->SGIndex = 0;
1144     if (scsi_sg_count(pcmd)) {
1145         size_t saved;
1146         pSRB->pSegmentList = scsi_sglist(pcmd);
1147         psgl = pSRB->pSegmentList;
1148         //dc390_pci_sync(pSRB);
1149
1150         while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1151         {
1152             pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1153             pSRB->SGIndex++;
1154             if( pSRB->SGIndex < pSRB->SGcount )
1155             {
1156                 pSRB->pSegmentList++;
1157
1158                 dc390_start_segment(pSRB);
1159             }
1160             else
1161                 pSRB->SGToBeXferLen = 0;
1162         }
1163
1164         saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1165         pSRB->SGToBeXferLen -= saved;
1166         pSRB->SGBusAddr += saved;
1167         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1168                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1169
1170     } else {
1171          pSRB->SGcount = 0;
1172          printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1173     }
1174
1175   pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1176 }
1177
1178
1179 /* According to the docs, the AM53C974 reads the message and
1180  * generates a Successful Operation IRQ before asserting ACK for
1181  * the last byte (how does it know whether it's the last ?) */
1182 /* The old code handled it in another way, indicating, that on
1183  * every message byte an IRQ is generated and every byte has to
1184  * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1185 /* The old implementation was correct. Sigh! */
1186
1187 /* Check if the message is complete */
1188 static u8 __inline__
1189 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1190 {
1191   if (*msgbuf == EXTENDED_MESSAGE)
1192   {
1193         if (len < 2) return 0;
1194         if (len < msgbuf[1] + 2) return 0;
1195   }
1196   else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1197         if (len < 2) return 0;
1198   return 1;
1199 }
1200
1201
1202
1203 /* read and eval received messages */
1204 static void
1205 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1206 {
1207     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1208
1209     /* Read the msg */
1210
1211     pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1212     //pSRB->SRBState = 0;
1213
1214     /* Msg complete ? */
1215     if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1216       {
1217         DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1218         /* Now eval the msg */
1219         switch (pSRB->MsgInBuf[0])
1220           {
1221           case DISCONNECT:
1222             pSRB->SRBState = SRB_DISCONNECT; break;
1223
1224           case SIMPLE_QUEUE_TAG:
1225           case HEAD_OF_QUEUE_TAG:
1226           case ORDERED_QUEUE_TAG:
1227             pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1228             break;
1229
1230           case MESSAGE_REJECT:
1231             DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1232             pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1233             if( pSRB->SRBState & DO_SYNC_NEGO)
1234               dc390_MsgIn_set_async (pACB, pSRB);
1235             break;
1236
1237           case EXTENDED_MESSAGE:
1238             /* reject every extended msg but SDTR */
1239             if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1240               dc390_MsgIn_reject (pACB, pSRB);
1241             else
1242               {
1243                 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1244                   dc390_MsgIn_set_async (pACB, pSRB);
1245                 else
1246                   dc390_MsgIn_set_sync (pACB, pSRB);
1247               }
1248
1249             // nothing has to be done
1250           case COMMAND_COMPLETE: break;
1251
1252             // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1253             // scsi command. Thanks, Gerard, for pointing it out.
1254           case SAVE_POINTERS:
1255             pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1256             break;
1257             // The device might want to restart transfer with a RESTORE
1258           case RESTORE_POINTERS:
1259             DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1260             dc390_restore_ptr (pACB, pSRB);
1261             break;
1262
1263             // reject unknown messages
1264           default: dc390_MsgIn_reject (pACB, pSRB);
1265           }
1266
1267         /* Clear counter and MsgIn state */
1268         pSRB->SRBState &= ~SRB_MSGIN;
1269         pACB->MsgLen = 0;
1270       }
1271
1272     *psstatus = SCSI_NOP0;
1273     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1274     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1275 }
1276
1277
1278 static void
1279 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1280 {
1281     unsigned long  lval;
1282     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1283
1284     if (pSRB == pACB->pTmpSRB)
1285     {
1286         if (pDCB)
1287                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1288         else
1289                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1290
1291         /* Try to recover - some broken disks react badly to tagged INQUIRY */
1292         if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1293                 pSRB = pDCB->pGoingSRB;
1294                 pDCB->pActiveSRB = pSRB;
1295         } else {
1296                 pSRB->pSRBDCB = pDCB;
1297                 dc390_EnableMsgOut_Abort(pACB, pSRB);
1298                 if (pDCB)
1299                         pDCB->DCBFlag |= ABORT_DEV;
1300                 return;
1301         }
1302     }
1303
1304     if( pSRB->SGIndex < pSRB->SGcount )
1305     {
1306         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1307         if( !pSRB->SGToBeXferLen )
1308         {
1309             dc390_start_segment(pSRB);
1310
1311             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1312         }
1313         lval = pSRB->SGToBeXferLen;
1314         DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1315         DC390_write8 (CtcReg_Low, (u8) lval);
1316         lval >>= 8;
1317         DC390_write8 (CtcReg_Mid, (u8) lval);
1318         lval >>= 8;
1319         DC390_write8 (CtcReg_High, (u8) lval);
1320
1321         DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1322         DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1323
1324         //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1325         pSRB->SRBState = SRB_DATA_XFER;
1326
1327         DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1328
1329         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1330         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1331         //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1332         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1333     }
1334     else    /* xfer pad */
1335     {
1336         if( pSRB->SGcount )
1337         {
1338             pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1339             pSRB->SRBStatus |= OVER_RUN;
1340             DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1341         }
1342         DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1343         DC390_write8 (CtcReg_Low, 0);
1344         DC390_write8 (CtcReg_Mid, 0);
1345         DC390_write8 (CtcReg_High, 0);
1346
1347         pSRB->SRBState |= SRB_XFERPAD;
1348         DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1349 /*
1350         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1351         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1352 */
1353     }
1354 }
1355
1356
1357 static void
1358 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1359 {
1360     dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1361 }
1362
1363 static void
1364 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1365 {
1366     dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1367 }
1368
1369 static void
1370 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1371 {
1372     struct dc390_dcb*   pDCB;
1373     u8  i, cnt;
1374     u8     *ptr;
1375
1376     DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1377     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1378     if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1379     {
1380         cnt = (u8) pSRB->pcmd->cmd_len;
1381         ptr = (u8 *) pSRB->pcmd->cmnd;
1382         for(i=0; i < cnt; i++)
1383             DC390_write8 (ScsiFifo, *(ptr++));
1384     }
1385     else
1386     {
1387         DC390_write8 (ScsiFifo, REQUEST_SENSE);
1388         pDCB = pACB->pActiveDCB;
1389         DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1390         DC390_write8 (ScsiFifo, 0);
1391         DC390_write8 (ScsiFifo, 0);
1392         DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
1393         DC390_write8 (ScsiFifo, 0);
1394         DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1395     }
1396     pSRB->SRBState = SRB_COMMAND;
1397     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1398 }
1399
1400 static void
1401 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1402 {
1403     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1404     pSRB->SRBState = SRB_STATUS;
1405     DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1406     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1407 }
1408
1409 static void
1410 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1411 {
1412     u8   bval, i, cnt;
1413     u8     *ptr;
1414     struct dc390_dcb*    pDCB;
1415
1416     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1417     pDCB = pACB->pActiveDCB;
1418     if( !(pSRB->SRBState & SRB_MSGOUT) )
1419     {
1420         cnt = pSRB->MsgCnt;
1421         if( cnt )
1422         {
1423             ptr = (u8 *) pSRB->MsgOutBuf;
1424             for(i=0; i < cnt; i++)
1425                 DC390_write8 (ScsiFifo, *(ptr++));
1426             pSRB->MsgCnt = 0;
1427             if( (pDCB->DCBFlag & ABORT_DEV_) &&
1428                 (pSRB->MsgOutBuf[0] == ABORT) )
1429                 pSRB->SRBState = SRB_ABORT_SENT;
1430         }
1431         else
1432         {
1433             bval = ABORT;       /* ??? MSG_NOP */
1434             if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1435                 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1436                 (pSRB->SRBFlag & AUTO_REQSENSE) )
1437             {
1438                 if( pDCB->SyncMode & SYNC_ENABLE )
1439                     goto  mop1;
1440             }
1441             DC390_write8 (ScsiFifo, bval);
1442         }
1443         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1444     }
1445     else
1446     {
1447 mop1:
1448         printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1449         DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1450         DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1451         DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1452         DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1453         if (pDCB->SyncOffset & 0x0f)
1454                     DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1455         else
1456                     DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1457         pSRB->SRBState |= DO_SYNC_NEGO;
1458         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1459     }
1460 }
1461
1462 static void
1463 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1464 {
1465     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1466     if( !(pSRB->SRBState & SRB_MSGIN) )
1467     {
1468         pSRB->SRBState &= ~SRB_DISCONNECT;
1469         pSRB->SRBState |= SRB_MSGIN;
1470     }
1471     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1472     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1473 }
1474
1475 static void
1476 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1477 {
1478 }
1479
1480 static void
1481 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1482 {
1483 }
1484
1485
1486 static void
1487 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1488 {
1489     u8  bval, i, cnt;
1490     struct dc390_dcb*   ptr;
1491
1492     if( !(pDCB->TargetLUN) )
1493     {
1494         if( !pACB->scan_devices )
1495         {
1496             ptr = pACB->pLinkDCB;
1497             cnt = pACB->DCBCnt;
1498             bval = pDCB->TargetID;
1499             for(i=0; i<cnt; i++)
1500             {
1501                 if( ptr->TargetID == bval )
1502                 {
1503                     ptr->SyncPeriod = pDCB->SyncPeriod;
1504                     ptr->SyncOffset = pDCB->SyncOffset;
1505                     ptr->CtrlR3 = pDCB->CtrlR3;
1506                     ptr->CtrlR4 = pDCB->CtrlR4;
1507                     ptr->SyncMode = pDCB->SyncMode;
1508                 }
1509                 ptr = ptr->pNextDCB;
1510             }
1511         }
1512     }
1513     return;
1514 }
1515
1516
1517 static void
1518 dc390_Disconnect( struct dc390_acb* pACB )
1519 {
1520     struct dc390_dcb *pDCB;
1521     struct dc390_srb *pSRB, *psrb;
1522     u8  i, cnt;
1523
1524     DEBUG0(printk(KERN_INFO "DISC,"));
1525
1526     if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1527     pACB->Connected = 0;
1528     pDCB = pACB->pActiveDCB;
1529     if (!pDCB)
1530      {
1531         DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1532                pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1533         mdelay(400);
1534         DC390_read8 (INT_Status);       /* Reset Pending INT */
1535         DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1536         return;
1537      }
1538     DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1539     pSRB = pDCB->pActiveSRB;
1540     pACB->pActiveDCB = NULL;
1541     pSRB->ScsiPhase = SCSI_NOP0;
1542     if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1543         pSRB->SRBState = 0;
1544     else if( pSRB->SRBState & SRB_ABORT_SENT )
1545     {
1546         pDCB->TagMask = 0;
1547         pDCB->DCBFlag = 0;
1548         cnt = pDCB->GoingSRBCnt;
1549         pDCB->GoingSRBCnt = 0;
1550         pSRB = pDCB->pGoingSRB;
1551         for( i=0; i < cnt; i++)
1552         {
1553             psrb = pSRB->pNextSRB;
1554             dc390_Free_insert (pACB, pSRB);
1555             pSRB = psrb;
1556         }
1557         pDCB->pGoingSRB = NULL;
1558     }
1559     else
1560     {
1561         if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1562            !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1563         {       /* Selection time out */
1564                 pSRB->AdaptStatus = H_SEL_TIMEOUT;
1565                 pSRB->TargetStatus = 0;
1566                 goto  disc1;
1567         }
1568         else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1569         {
1570 disc1:
1571             dc390_freetag (pDCB, pSRB);
1572             pDCB->pActiveSRB = NULL;
1573             pSRB->SRBState = SRB_FREE;
1574             dc390_SRBdone( pACB, pDCB, pSRB);
1575         }
1576     }
1577     pACB->MsgLen = 0;
1578 }
1579
1580
1581 static void
1582 dc390_Reselect( struct dc390_acb* pACB )
1583 {
1584     struct dc390_dcb*   pDCB;
1585     struct dc390_srb*   pSRB;
1586     u8  id, lun;
1587
1588     DEBUG0(printk(KERN_INFO "RSEL,"));
1589     pACB->Connected = 1;
1590     pDCB = pACB->pActiveDCB;
1591     if( pDCB )
1592     {   /* Arbitration lost but Reselection won */
1593         DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1594         pSRB = pDCB->pActiveSRB;
1595         if( !( pACB->scan_devices ) )
1596         {
1597             struct scsi_cmnd *pcmd = pSRB->pcmd;
1598             scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1599             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1600             dc390_Going_remove(pDCB, pSRB);
1601             dc390_Free_insert(pACB, pSRB);
1602             pcmd->scsi_done (pcmd);
1603             DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1604         }
1605     }
1606     /* Get ID */
1607     lun = DC390_read8 (ScsiFifo);
1608     DEBUG0(printk ("Dev %02x,", lun));
1609     if (!(lun & (1 << pACB->pScsiHost->this_id)))
1610       printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1611     else
1612       lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1613     id = 0; while (lun >>= 1) id++;
1614     /* Get LUN */
1615     lun = DC390_read8 (ScsiFifo);
1616     if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1617     lun &= 7;
1618     DEBUG0(printk ("(%02i-%i),", id, lun));
1619     pDCB = dc390_findDCB (pACB, id, lun);
1620     if (!pDCB)
1621     {
1622         printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1623                     id, lun);
1624         return;
1625     }
1626     pACB->pActiveDCB = pDCB;
1627     /* TagQ: We expect a message soon, so never mind the exact SRB */
1628     if( pDCB->SyncMode & EN_TAG_QUEUEING )
1629     {
1630         pSRB = pACB->pTmpSRB;
1631         pDCB->pActiveSRB = pSRB;
1632     }
1633     else
1634     {
1635         pSRB = pDCB->pActiveSRB;
1636         if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1637         {
1638             pSRB= pACB->pTmpSRB;
1639             pSRB->SRBState = SRB_UNEXPECT_RESEL;
1640             printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1641                     id, lun);
1642             pDCB->pActiveSRB = pSRB;
1643             dc390_EnableMsgOut_Abort ( pACB, pSRB );
1644         }
1645         else
1646         {
1647             if( pDCB->DCBFlag & ABORT_DEV_ )
1648             {
1649                 pSRB->SRBState = SRB_ABORT_SENT;
1650                 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1651                         id, lun);
1652                 dc390_EnableMsgOut_Abort( pACB, pSRB );
1653             }
1654             else
1655                 pSRB->SRBState = SRB_DATA_XFER;
1656         }
1657     }
1658
1659     DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1660     pSRB->ScsiPhase = SCSI_NOP0;
1661     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1662     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1663     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1664     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1665     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1666     DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1667     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1668 }
1669
1670 static int __inline__
1671 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1672 {
1673         struct scsi_cmnd *pcmd;
1674
1675         pcmd = pSRB->pcmd;
1676
1677         REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1678                               pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1679
1680         pSRB->SRBFlag |= AUTO_REQSENSE;
1681         pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1682         pSRB->AdaptStatus = 0;
1683         pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1684
1685         /* We are called from SRBdone, original PCI mapping has been removed
1686          * already, new one is set up from StartSCSI */
1687         pSRB->SGIndex = 0;
1688
1689         pSRB->TotalXferredLen = 0;
1690         pSRB->SGToBeXferLen = 0;
1691         return dc390_StartSCSI(pACB, pDCB, pSRB);
1692 }
1693
1694
1695 static void
1696 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1697 {
1698     u8 status;
1699     struct scsi_cmnd *pcmd;
1700
1701     pcmd = pSRB->pcmd;
1702     /* KG: Moved pci_unmap here */
1703     dc390_pci_unmap(pSRB);
1704
1705     status = pSRB->TargetStatus;
1706
1707     DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1708                 pSRB, pcmd->serial_number));
1709     if(pSRB->SRBFlag & AUTO_REQSENSE)
1710     {   /* Last command was a Request Sense */
1711         pSRB->SRBFlag &= ~AUTO_REQSENSE;
1712         pSRB->AdaptStatus = 0;
1713         pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;
1714
1715         //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1716         if (status == SAM_STAT_CHECK_CONDITION)
1717             pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1718         else /* Retry */
1719         {
1720             if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1721             {
1722                 /* Don't retry on TEST_UNIT_READY */
1723                 pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
1724                 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1725                        (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1726             } else {
1727                 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1728                 //pSRB->ScsiCmdLen       = (u8) (pSRB->Segment1[0] >> 8);
1729                 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1730                 pSRB->TotalXferredLen = 0;
1731                 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1732             }
1733         }
1734         goto cmd_done;
1735     }
1736     if( status )
1737     {
1738         if (status == SAM_STAT_CHECK_CONDITION)
1739         {
1740             if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1741                 SET_RES_DID(pcmd->result, DID_ERROR);
1742                 goto cmd_done;
1743             }
1744             return;
1745         }
1746         else if (status == SAM_STAT_TASK_SET_FULL)
1747         {
1748             scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1749             DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1750             pSRB->TotalXferredLen = 0;
1751             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1752         }
1753         else if (status == SAM_STAT_BUSY &&
1754                  (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1755                  pACB->scan_devices)
1756         {
1757             pSRB->AdaptStatus = 0;
1758             pSRB->TargetStatus = status;
1759             pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1760         }
1761         else
1762         {   /* Another error */
1763             pSRB->TotalXferredLen = 0;
1764             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1765             goto cmd_done;
1766         }
1767     }
1768     else
1769     {   /*  Target status == 0 */
1770         status = pSRB->AdaptStatus;
1771         if (status == H_OVER_UNDER_RUN)
1772         {
1773             pSRB->TargetStatus = 0;
1774             SET_RES_DID(pcmd->result,DID_OK);
1775             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1776         }
1777         else if (status == H_SEL_TIMEOUT)
1778         {
1779             pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
1780             /* Devices are removed below ... */
1781         }
1782         else if( pSRB->SRBStatus & PARITY_ERROR)
1783         {
1784             //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1785             SET_RES_DID(pcmd->result,DID_PARITY);
1786             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1787         }
1788         else                   /* No error */
1789         {
1790             pSRB->AdaptStatus = 0;
1791             pSRB->TargetStatus = 0;
1792             SET_RES_DID(pcmd->result,DID_OK);
1793         }
1794     }
1795
1796 cmd_done:
1797     scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
1798
1799     dc390_Going_remove (pDCB, pSRB);
1800     /* Add to free list */
1801     dc390_Free_insert (pACB, pSRB);
1802
1803     DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->serial_number));
1804     pcmd->scsi_done (pcmd);
1805
1806     return;
1807 }
1808
1809
1810 /* Remove all SRBs from Going list and inform midlevel */
1811 static void
1812 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1813 {
1814     struct dc390_dcb *pDCB, *pdcb;
1815     struct dc390_srb *psrb, *psrb2;
1816     int i;
1817     struct scsi_cmnd *pcmd;
1818
1819     pDCB = pACB->pLinkDCB;
1820     pdcb = pDCB;
1821     if (! pdcb) return;
1822     do
1823     {
1824         psrb = pdcb->pGoingSRB;
1825         for (i = 0; i < pdcb->GoingSRBCnt; i++)
1826         {
1827             psrb2 = psrb->pNextSRB;
1828             pcmd = psrb->pcmd;
1829             dc390_Free_insert (pACB, psrb);
1830             psrb  = psrb2;
1831         }
1832         pdcb->GoingSRBCnt = 0;
1833         pdcb->pGoingSRB = NULL;
1834         pdcb->TagMask = 0;
1835         pdcb = pdcb->pNextDCB;
1836     } while( pdcb != pDCB );
1837 }
1838
1839
1840 static void
1841 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1842 {
1843     //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1844     //udelay (250);
1845     //DC390_write8 (ScsiCmd, NOP_CMD);
1846
1847     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1848     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1849     DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1850     pACB->Connected = 0;
1851
1852     return;
1853 }
1854
1855 static void
1856 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1857 {
1858     printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1859     //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1860
1861     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1862     /* Unlock before ? */
1863     /* delay half a second */
1864     udelay (1000);
1865     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1866     pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1867                     + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1868     pACB->Connected = 0;
1869
1870     if( pACB->ACBFlag & RESET_DEV )
1871         pACB->ACBFlag |= RESET_DONE;
1872     else
1873     {   /* Reset was issued by sb else */
1874         pACB->ACBFlag |= RESET_DETECT;
1875
1876         dc390_ResetDevParam( pACB );
1877         dc390_DoingSRB_Done( pACB, NULL);
1878         //dc390_RecoverSRB( pACB );
1879         pACB->pActiveDCB = NULL;
1880         pACB->ACBFlag = 0;
1881     }
1882     return;
1883 }
1884
1885 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1886                 void (*done)(struct scsi_cmnd *))
1887 {
1888         struct scsi_device *sdev = cmd->device;
1889         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1890         struct dc390_dcb *dcb = sdev->hostdata;
1891         struct dc390_srb *srb;
1892
1893         if (sdev->queue_depth <= dcb->GoingSRBCnt)
1894                 goto device_busy;
1895         if (acb->pActiveDCB)
1896                 goto host_busy;
1897         if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1898                 goto host_busy;
1899
1900         srb = acb->pFreeSRB;
1901         if (unlikely(srb == NULL))
1902                 goto host_busy;
1903
1904         cmd->scsi_done = done;
1905         cmd->result = 0;
1906         acb->Cmds++;
1907
1908         acb->pFreeSRB = srb->pNextSRB;
1909         srb->pNextSRB = NULL;
1910
1911         srb->pSRBDCB = dcb;
1912         srb->pcmd = cmd;
1913         cmd->host_scribble = (char *)srb;
1914
1915         srb->SGIndex = 0;
1916         srb->AdaptStatus = 0;
1917         srb->TargetStatus = 0;
1918         srb->MsgCnt = 0;
1919
1920         srb->SRBStatus = 0;
1921         srb->SRBFlag = 0;
1922         srb->SRBState = 0;
1923         srb->TotalXferredLen = 0;
1924         srb->SGBusAddr = 0;
1925         srb->SGToBeXferLen = 0;
1926         srb->ScsiPhase = 0;
1927         srb->EndMessage = 0;
1928         srb->TagNumber = SCSI_NO_TAG;
1929
1930         if (dc390_StartSCSI(acb, dcb, srb)) {
1931                 dc390_Free_insert(acb, srb);
1932                 goto host_busy;
1933         }
1934
1935         dc390_Going_append(dcb, srb);
1936
1937         return 0;
1938
1939  host_busy:
1940         return SCSI_MLQUEUE_HOST_BUSY;
1941
1942  device_busy:
1943         return SCSI_MLQUEUE_DEVICE_BUSY;
1944 }
1945
1946 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1947 {
1948     struct pci_dev *pdev;
1949     u16 pstat;
1950
1951     if (!pDCB) pDCB = pACB->pActiveDCB;
1952     if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1953
1954     if (pSRB)
1955     {
1956         printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1957                 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1958                 pSRB->ScsiPhase);
1959         printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1960     }
1961     printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1962     printk ("DC390: Register dump: SCSI block:\n");
1963     printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1964     printk ("DC390:  %06x   %02x   %02x   %02x",
1965             DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1966             DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1967     printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
1968             DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1969             DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1970     DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1971     if (DC390_read8(Current_Fifo) & 0x1f)
1972       {
1973         printk ("DC390: FIFO:");
1974         while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1975         printk ("\n");
1976       }
1977     printk ("DC390: Register dump: DMA engine:\n");
1978     printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
1979     printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
1980             DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1981             DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1982             DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1983     DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1984
1985     pdev = pACB->pdev;
1986     pci_read_config_word(pdev, PCI_STATUS, &pstat);
1987     printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
1988     printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
1989 }
1990
1991
1992 static int DC390_abort(struct scsi_cmnd *cmd)
1993 {
1994         struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
1995         struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
1996
1997         scmd_printk(KERN_WARNING, cmd,
1998                 "DC390: Abort command (pid %li)\n", cmd->serial_number);
1999
2000         /* abort() is too stupid for already sent commands at the moment.
2001          * If it's called we are in trouble anyway, so let's dump some info
2002          * into the syslog at least. (KG, 98/08/20,99/06/20) */
2003         dc390_dumpinfo(pACB, pDCB, NULL);
2004
2005         pDCB->DCBFlag |= ABORT_DEV_;
2006         printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->serial_number);
2007
2008         return FAILED;
2009 }
2010
2011
2012 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2013 {
2014     struct dc390_dcb *pDCB, *pdcb;
2015
2016     pDCB = pACB->pLinkDCB;
2017     if (! pDCB) return;
2018     pdcb = pDCB;
2019     do
2020     {
2021         pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2022         pDCB->SyncPeriod = 0;
2023         pDCB->SyncOffset = 0;
2024         pDCB->TagMask = 0;
2025         pDCB->CtrlR3 = FAST_CLK;
2026         pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2027         pDCB->CtrlR4 |= pACB->glitch_cfg;
2028         pDCB = pDCB->pNextDCB;
2029     }
2030     while( pdcb != pDCB );
2031     pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2032
2033 }
2034
2035 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2036 {
2037         struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2038         u8   bval;
2039
2040         spin_lock_irq(cmd->device->host->host_lock);
2041
2042         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2043         DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2044
2045         pACB->ACBFlag |= RESET_DEV;
2046         dc390_ResetSCSIBus(pACB);
2047
2048         dc390_ResetDevParam(pACB);
2049         mdelay(1);
2050         pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2051                 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2052
2053         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2054         DC390_read8(INT_Status);                /* Reset Pending INT */
2055
2056         dc390_DoingSRB_Done(pACB, cmd);
2057
2058         pACB->pActiveDCB = NULL;
2059         pACB->ACBFlag = 0;
2060
2061         bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2062         DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2063
2064         spin_unlock_irq(cmd->device->host->host_lock);
2065
2066         return SUCCESS;
2067 }
2068
2069 /**
2070  * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2071  * scsi device that we need to deal with.
2072  *
2073  * @scsi_device: The new scsi device that we need to handle.
2074  */
2075 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2076 {
2077         struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2078         struct dc390_dcb *pDCB, *pDCB2 = NULL;
2079         uint id = scsi_device->id;
2080         uint lun = scsi_device->lun;
2081
2082         pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2083         if (!pDCB)
2084                 return -ENOMEM;
2085
2086         if (!pACB->DCBCnt++) {
2087                 pACB->pLinkDCB = pDCB;
2088                 pACB->pDCBRunRobin = pDCB;
2089         } else {
2090                 pACB->pLastDCB->pNextDCB = pDCB;
2091         }
2092
2093         pDCB->pNextDCB = pACB->pLinkDCB;
2094         pACB->pLastDCB = pDCB;
2095
2096         pDCB->pDCBACB = pACB;
2097         pDCB->TargetID = id;
2098         pDCB->TargetLUN = lun;
2099
2100         /*
2101          * Some values are for all LUNs: Copy them
2102          * In a clean way: We would have an own structure for a SCSI-ID
2103          */
2104         if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2105                 pDCB->DevMode = pDCB2->DevMode;
2106                 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2107                 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2108                 pDCB->SyncOffset = pDCB2->SyncOffset;
2109                 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2110
2111                 pDCB->CtrlR3 = pDCB2->CtrlR3;
2112                 pDCB->CtrlR4 = pDCB2->CtrlR4;
2113         } else {
2114                 u8 index = pACB->AdapterIndex;
2115                 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2116
2117                 pDCB->DevMode = prom->EE_MODE1;
2118                 pDCB->NegoPeriod =
2119                         (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2120                 pDCB->CtrlR3 = FAST_CLK;
2121                 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2122                 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2123                         pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2124         }
2125
2126         if (pDCB->DevMode & SYNC_NEGO_)
2127                 pDCB->SyncMode |= SYNC_ENABLE;
2128         else {
2129                 pDCB->SyncMode = 0;
2130                 pDCB->SyncOffset &= ~0x0f;
2131         }
2132
2133         pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2134         if (pDCB->DevMode & PARITY_CHK_)
2135                 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2136
2137         pACB->scan_devices = 1;
2138         scsi_device->hostdata = pDCB;
2139         return 0;
2140 }
2141
2142 /**
2143  * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2144  * device that is going away.
2145  *
2146  * @scsi_device: The scsi device that we need to remove.
2147  */
2148 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2149 {
2150         struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2151         struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2152         struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2153
2154         pACB->scan_devices = 0;
2155
2156         BUG_ON(pDCB->GoingSRBCnt > 1);
2157
2158         if (pDCB == pACB->pLinkDCB) {
2159                 if (pACB->pLastDCB == pDCB) {
2160                         pDCB->pNextDCB = NULL;
2161                         pACB->pLastDCB = NULL;
2162                 }
2163                 pACB->pLinkDCB = pDCB->pNextDCB;
2164         } else {
2165                 while (pPrevDCB->pNextDCB != pDCB)
2166                         pPrevDCB = pPrevDCB->pNextDCB;
2167                 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2168                 if (pDCB == pACB->pLastDCB)
2169                         pACB->pLastDCB = pPrevDCB;
2170         }
2171
2172         if (pDCB == pACB->pActiveDCB)
2173                 pACB->pActiveDCB = NULL;
2174         if (pDCB == pACB->pLinkDCB)
2175                 pACB->pLinkDCB = pDCB->pNextDCB;
2176         if (pDCB == pACB->pDCBRunRobin)
2177                 pACB->pDCBRunRobin = pDCB->pNextDCB;
2178         kfree(pDCB);
2179
2180         pACB->DCBCnt--;
2181 }
2182
2183 static int dc390_slave_configure(struct scsi_device *sdev)
2184 {
2185         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2186         struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2187
2188         acb->scan_devices = 0;
2189         if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2190                 dcb->SyncMode |= EN_TAG_QUEUEING;
2191                 scsi_activate_tcq(sdev, acb->TagMaxNum);
2192         }
2193
2194         return 0;
2195 }
2196
2197 static struct scsi_host_template driver_template = {
2198         .module                 = THIS_MODULE,
2199         .proc_name              = "tmscsim",
2200         .name                   = DC390_BANNER " V" DC390_VERSION,
2201         .slave_alloc            = dc390_slave_alloc,
2202         .slave_configure        = dc390_slave_configure,
2203         .slave_destroy          = dc390_slave_destroy,
2204         .queuecommand           = DC390_queuecommand,
2205         .eh_abort_handler       = DC390_abort,
2206         .eh_bus_reset_handler   = DC390_bus_reset,
2207         .can_queue              = 1,
2208         .this_id                = 7,
2209         .sg_tablesize           = SG_ALL,
2210         .cmd_per_lun            = 1,
2211         .use_clustering         = ENABLE_CLUSTERING,
2212         .max_sectors            = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2213 };
2214
2215 /***********************************************************************
2216  * Functions for access to DC390 EEPROM
2217  * and some to emulate it
2218  *
2219  **********************************************************************/
2220
2221 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2222 {
2223         u8 carryFlag = 1, j = 0x80, bval;
2224         int i;
2225
2226         for (i = 0; i < 9; i++) {
2227                 if (carryFlag) {
2228                         pci_write_config_byte(pdev, 0x80, 0x40);
2229                         bval = 0xc0;
2230                 } else
2231                         bval = 0x80;
2232
2233                 udelay(160);
2234                 pci_write_config_byte(pdev, 0x80, bval);
2235                 udelay(160);
2236                 pci_write_config_byte(pdev, 0x80, 0);
2237                 udelay(160);
2238
2239                 carryFlag = (cmd & j) ? 1 : 0;
2240                 j >>= 1;
2241         }
2242 }
2243
2244 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2245 {
2246         int i;
2247         u16 wval = 0;
2248         u8 bval;
2249
2250         for (i = 0; i < 16; i++) {
2251                 wval <<= 1;
2252
2253                 pci_write_config_byte(pdev, 0x80, 0x80);
2254                 udelay(160);
2255                 pci_write_config_byte(pdev, 0x80, 0x40);
2256                 udelay(160);
2257                 pci_read_config_byte(pdev, 0x00, &bval);
2258
2259                 if (bval == 0x22)
2260                         wval |= 1;
2261         }
2262
2263         return wval;
2264 }
2265
2266 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2267 {
2268         u8 cmd = EEPROM_READ, i;
2269
2270         for (i = 0; i < 0x40; i++) {
2271                 pci_write_config_byte(pdev, 0xc0, 0);
2272                 udelay(160);
2273
2274                 dc390_eeprom_prepare_read(pdev, cmd++);
2275                 *ptr++ = dc390_eeprom_get_data(pdev);
2276
2277                 pci_write_config_byte(pdev, 0x80, 0);
2278                 pci_write_config_byte(pdev, 0x80, 0);
2279                 udelay(160);
2280         }
2281 }
2282
2283 /* Override EEprom values with explicitly set values */
2284 static void __devinit dc390_eeprom_override(u8 index)
2285 {
2286         u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2287
2288         /* Adapter Settings */
2289         if (tmscsim[0] != -2)
2290                 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2291         if (tmscsim[3] != -2)
2292                 ptr[EE_MODE2] = (u8)tmscsim[3];
2293         if (tmscsim[5] != -2)
2294                 ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2295         if (tmscsim[4] != -2)
2296                 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2297
2298         /* Device Settings */
2299         for (id = 0; id < MAX_SCSI_ID; id++) {
2300                 if (tmscsim[2] != -2)
2301                         ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2302                 if (tmscsim[1] != -2)
2303                         ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2304         }
2305 }
2306
2307 static int __devinitdata tmscsim_def[] = {
2308         7,
2309         0 /* 10MHz */,
2310         PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2311         MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2312         3 /* 16 Tags per LUN */,
2313         1 /* s delay after Reset */,
2314 };
2315
2316 /* Copy defaults over set values where missing */
2317 static void __devinit dc390_fill_with_defaults (void)
2318 {
2319         int i;
2320
2321         for (i = 0; i < 6; i++) {
2322                 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2323                         tmscsim[i] = tmscsim_def[i];
2324         }
2325
2326         /* Sanity checks */
2327         if (tmscsim[0] > 7)
2328                 tmscsim[0] = 7;
2329         if (tmscsim[1] > 7)
2330                 tmscsim[1] = 4;
2331         if (tmscsim[4] > 5)
2332                 tmscsim[4] = 4;
2333         if (tmscsim[5] > 180)
2334                 tmscsim[5] = 180;
2335 }
2336
2337 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2338 {
2339         u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2340         u8 EEbuf[128];
2341         u16 *ptr = (u16 *)EEbuf, wval = 0;
2342         int i;
2343
2344         dc390_read_eeprom(pdev, ptr);
2345         memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2346         memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2347                &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2348
2349         dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2350
2351         for (i = 0; i < 0x40; i++, ptr++)
2352                 wval += *ptr;
2353
2354         /* no Tekram EEprom found */
2355         if (wval != 0x1234) {
2356                 int speed;
2357
2358                 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2359
2360                 /*
2361                  * XXX(hch): bogus, because we might have tekram and
2362                  *           non-tekram hbas in a single machine.
2363                  */
2364                 dc390_fill_with_defaults();
2365
2366                 speed = dc390_clock_speed[tmscsim[1]];
2367                 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2368                        "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2369                        tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2370                        (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2371         }
2372 }
2373
2374 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2375 {
2376         struct Scsi_Host *shost = pACB->pScsiHost;
2377         u8 dstate;
2378
2379         /* Disable SCSI bus reset interrupt */
2380         DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2381
2382         if (pACB->Gmode2 & RST_SCSI_BUS) {
2383                 dc390_ResetSCSIBus(pACB);
2384                 udelay(1000);
2385                 shost->last_reset = jiffies + HZ/2 +
2386                         HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2387         }
2388
2389         pACB->ACBFlag = 0;
2390
2391         /* Reset Pending INT */
2392         DC390_read8(INT_Status);
2393
2394         /* 250ms selection timeout */
2395         DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2396
2397         /* Conversion factor = 0 , 40MHz clock */
2398         DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2399
2400         /* NOP cmd - clear command register */
2401         DC390_write8(ScsiCmd, NOP_CMD);
2402
2403         /* Enable Feature and SCSI-2 */
2404         DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2405
2406         /* Fast clock */
2407         DC390_write8(CtrlReg3, FAST_CLK);
2408
2409         /* Negation */
2410         DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2411                 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2412                  NEGATE_REQACKDATA : 0);
2413
2414         /* Clear Transfer Count High: ID */
2415         DC390_write8(CtcReg_High, 0);
2416         DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2417         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2418         DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2419
2420         dstate = DC390_read8(DMA_Status);
2421         DC390_write8(DMA_Status, dstate);
2422 }
2423
2424 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2425                                     const struct pci_device_id *id)
2426 {
2427         struct dc390_acb *pACB;
2428         struct Scsi_Host *shost;
2429         unsigned long io_port;
2430         int error = -ENODEV, i;
2431
2432         if (pci_enable_device(pdev))
2433                 goto out;
2434
2435         pci_set_master(pdev);
2436
2437         error = -ENOMEM;
2438         if (disable_clustering)
2439                 driver_template.use_clustering = DISABLE_CLUSTERING;
2440         shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2441         if (!shost)
2442                 goto out_disable_device;
2443
2444         pACB = (struct dc390_acb *)shost->hostdata;
2445         memset(pACB, 0, sizeof(struct dc390_acb));
2446
2447         dc390_check_eeprom(pdev, dc390_adapterCnt);
2448         dc390_eeprom_override(dc390_adapterCnt);
2449
2450         io_port = pci_resource_start(pdev, 0);
2451
2452         shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2453         shost->io_port = io_port;
2454         shost->n_io_port = 0x80;
2455         shost->irq = pdev->irq;
2456         shost->base = io_port;
2457         shost->unique_id = io_port;
2458         shost->last_reset = jiffies;
2459
2460         pACB->pScsiHost = shost;
2461         pACB->IOPortBase = (u16) io_port;
2462         pACB->IRQLevel = pdev->irq;
2463
2464         shost->max_id = 8;
2465
2466         if (shost->max_id - 1 ==
2467             dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2468                 shost->max_id--;
2469
2470         if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2471                 shost->max_lun = 8;
2472         else
2473                 shost->max_lun = 1;
2474
2475         pACB->pFreeSRB = pACB->SRB_array;
2476         pACB->SRBCount = MAX_SRB_CNT;
2477         pACB->AdapterIndex = dc390_adapterCnt;
2478         pACB->TagMaxNum =
2479                 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2480         pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2481
2482         for (i = 0; i < pACB->SRBCount-1; i++)
2483                 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2484         pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2485         pACB->pTmpSRB = &pACB->TmpSRB;
2486
2487         pACB->sel_timeout = SEL_TIMEOUT;
2488         pACB->glitch_cfg = EATER_25NS;
2489         pACB->pdev = pdev;
2490
2491         if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2492                 printk(KERN_ERR "DC390: register IO ports error!\n");
2493                 goto out_host_put;
2494         }
2495
2496         /* Reset Pending INT */
2497         DC390_read8_(INT_Status, io_port);
2498
2499         if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2500                                 "tmscsim", pACB)) {
2501                 printk(KERN_ERR "DC390: register IRQ error!\n");
2502                 goto out_release_region;
2503         }
2504
2505         dc390_init_hw(pACB, dc390_adapterCnt);
2506
2507         dc390_adapterCnt++;
2508
2509         pci_set_drvdata(pdev, shost);
2510
2511         error = scsi_add_host(shost, &pdev->dev);
2512         if (error)
2513                 goto out_free_irq;
2514         scsi_scan_host(shost);
2515         return 0;
2516
2517  out_free_irq:
2518         free_irq(pdev->irq, pACB);
2519  out_release_region:
2520         release_region(io_port, shost->n_io_port);
2521  out_host_put:
2522         scsi_host_put(shost);
2523  out_disable_device:
2524         pci_disable_device(pdev);
2525  out:
2526         return error;
2527 }
2528
2529 /**
2530  * dc390_remove_one - Called to remove a single instance of the adapter.
2531  *
2532  * @dev: The PCI device to remove.
2533  */
2534 static void __devexit dc390_remove_one(struct pci_dev *dev)
2535 {
2536         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2537         unsigned long iflags;
2538         struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2539         u8 bval;
2540
2541         scsi_remove_host(scsi_host);
2542
2543         spin_lock_irqsave(scsi_host->host_lock, iflags);
2544         pACB->ACBFlag = RESET_DEV;
2545         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2546         DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2547         if (pACB->Gmode2 & RST_SCSI_BUS)
2548                 dc390_ResetSCSIBus(pACB);
2549         spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2550
2551         free_irq(scsi_host->irq, pACB);
2552         release_region(scsi_host->io_port, scsi_host->n_io_port);
2553
2554         pci_disable_device(dev);
2555         scsi_host_put(scsi_host);
2556         pci_set_drvdata(dev, NULL);
2557 }
2558
2559 static struct pci_device_id tmscsim_pci_tbl[] = {
2560         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2561                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2562         { }
2563 };
2564 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2565
2566 static struct pci_driver dc390_driver = {
2567         .name           = "tmscsim",
2568         .id_table       = tmscsim_pci_tbl,
2569         .probe          = dc390_probe_one,
2570         .remove         = __devexit_p(dc390_remove_one),
2571 };
2572
2573 static int __init dc390_module_init(void)
2574 {
2575         if (!disable_clustering) {
2576                 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n");
2577                 printk(KERN_INFO "       with \"disable_clustering=1\" and report to maintainers\n");
2578         }
2579
2580         if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2581                 tmscsim[0] = 7;
2582                 tmscsim[1] = 4;
2583                 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2584                 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2585                 tmscsim[4] = 2;
2586                 tmscsim[5] = 10;
2587                 printk (KERN_INFO "DC390: Using safe settings.\n");
2588         }
2589
2590         return pci_register_driver(&dc390_driver);
2591 }
2592
2593 static void __exit dc390_module_exit(void)
2594 {
2595         pci_unregister_driver(&dc390_driver);
2596 }
2597
2598 module_init(dc390_module_init);
2599 module_exit(dc390_module_exit);
2600
2601 #ifndef MODULE
2602 static int __init dc390_setup (char *str)
2603 {
2604         int ints[8],i, im;
2605
2606         get_options(str, ARRAY_SIZE(ints), ints);
2607         im = ints[0];
2608
2609         if (im > 6) {
2610                 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2611                 im = 6;
2612         }
2613
2614         for (i = 0; i < im; i++)
2615                 tmscsim[i] = ints[i+1];
2616         /* dc390_checkparams (); */
2617         return 1;
2618 }
2619
2620 __setup("tmscsim=", dc390_setup);
2621 #endif