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/sched.h>
 225 #include <linux/errno.h>
 226 #include <linux/kernel.h>
 227 #include <linux/ioport.h>
 228 #include <linux/pci.h>
 229 #include <linux/proc_fs.h>
 230 #include <linux/string.h>
 231 #include <linux/mm.h>
 232 #include <linux/blkdev.h>
 233 #include <linux/timer.h>
 234 #include <linux/interrupt.h>
 235 #include <linux/init.h>
 236 #include <linux/spinlock.h>
 237 #include <asm/io.h>
 238
 239 #include <scsi/scsi.h>
 240 #include <scsi/scsi_cmnd.h>
 241 #include <scsi/scsi_device.h>
 242 #include <scsi/scsi_host.h>
 243 #include <scsi/scsicam.h>
 244 #include <scsi/scsi_tcq.h>
 245
 246
 247 #define DC390_BANNER "Tekram DC390/AM53C974"
 248 #define DC390_VERSION "2.1d 2004-05-27"
 249
 250 #define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI
 251
 252 #include "tmscsim.h"
 253
 254
 255 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 256 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 257 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 258 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 259 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 260 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 261 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 262 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 263 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 264 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 265 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 266 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 267 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 268 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 269
 270 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
 271 static void dc390_Disconnect( struct dc390_acb* pACB );
 272 static void dc390_Reselect( struct dc390_acb* pACB );
 273 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
 274 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
 275 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
 276 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
 277 static void dc390_ResetDevParam(struct dc390_acb* pACB);
 278
 279 static u32      dc390_laststatus = 0;
 280 static u8       dc390_adapterCnt = 0;
 281
 282 static int disable_clustering;
 283 module_param(disable_clustering, int, S_IRUGO);
 284 MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
 285
 286 /* Startup values, to be overriden on the commandline */
 287 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
 288
 289 module_param_array(tmscsim, int, NULL, 0);
 290 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
 291 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
 292 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
 293 MODULE_LICENSE("GPL");
 294 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
 295
 296 static void *dc390_phase0[]={
 297        dc390_DataOut_0,
 298        dc390_DataIn_0,
 299        dc390_Command_0,
 300        dc390_Status_0,
 301        dc390_Nop_0,
 302        dc390_Nop_0,
 303        dc390_MsgOut_0,
 304        dc390_MsgIn_0,
 305        dc390_Nop_1
 306        };
 307
 308 static void *dc390_phase1[]={
 309        dc390_DataOutPhase,
 310        dc390_DataInPhase,
 311        dc390_CommandPhase,
 312        dc390_StatusPhase,
 313        dc390_Nop_0,
 314        dc390_Nop_0,
 315        dc390_MsgOutPhase,
 316        dc390_MsgInPhase,
 317        dc390_Nop_1
 318        };
 319
 320 #ifdef DC390_DEBUG1
 321 static char* dc390_p0_str[] = {
 322        "dc390_DataOut_0",
 323        "dc390_DataIn_0",
 324        "dc390_Command_0",
 325        "dc390_Status_0",
 326        "dc390_Nop_0",
 327        "dc390_Nop_0",
 328        "dc390_MsgOut_0",
 329        "dc390_MsgIn_0",
 330        "dc390_Nop_1"
 331        };
 332
 333 static char* dc390_p1_str[] = {
 334        "dc390_DataOutPhase",
 335        "dc390_DataInPhase",
 336        "dc390_CommandPhase",
 337        "dc390_StatusPhase",
 338        "dc390_Nop_0",
 339        "dc390_Nop_0",
 340        "dc390_MsgOutPhase",
 341        "dc390_MsgInPhase",
 342        "dc390_Nop_1"
 343        };
 344 #endif
 345
 346 static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
 347 static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
 348 static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
 349
 350 /***********************************************************************
 351  * Functions for the management of the internal structures
 352  * (DCBs, SRBs, Queueing)
 353  *
 354  **********************************************************************/
 355 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 356 {
 357    struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 358    while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 359      {
 360         pDCB = pDCB->pNextDCB;
 361         if (pDCB == pACB->pLinkDCB)
 362              return NULL;
 363      }
 364    DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 365                       pDCB, pDCB->TargetID, pDCB->TargetLUN));
 366    return pDCB;
 367 }
 368
 369 /* Insert SRB oin top of free list */
 370 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 371 {
 372     DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 373     pSRB->pNextSRB = pACB->pFreeSRB;
 374     pACB->pFreeSRB = pSRB;
 375 }
 376
 377 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 378 {
 379     pDCB->GoingSRBCnt++;
 380     DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 381     /* Append to the list of Going commands */
 382     if( pDCB->pGoingSRB )
 383         pDCB->pGoingLast->pNextSRB = pSRB;
 384     else
 385         pDCB->pGoingSRB = pSRB;
 386
 387     pDCB->pGoingLast = pSRB;
 388     /* No next one in sent list */
 389     pSRB->pNextSRB = NULL;
 390 }
 391
 392 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 393 {
 394         DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 395    if (pSRB == pDCB->pGoingSRB)
 396         pDCB->pGoingSRB = pSRB->pNextSRB;
 397    else
 398      {
 399         struct dc390_srb* psrb = pDCB->pGoingSRB;
 400         while (psrb && psrb->pNextSRB != pSRB)
 401           psrb = psrb->pNextSRB;
 402         if (!psrb)
 403           { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 404         psrb->pNextSRB = pSRB->pNextSRB;
 405         if (pSRB == pDCB->pGoingLast)
 406           pDCB->pGoingLast = psrb;
 407      }
 408    pDCB->GoingSRBCnt--;
 409 }
 410
 411 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 412 {
 413         memset(sg, 0, sizeof(struct scatterlist));
 414         sg->page        = virt_to_page(addr);
 415         sg->length      = length;
 416         sg->offset      = (unsigned long)addr & ~PAGE_MASK;
 417         return sg;
 418 }
 419
 420 /* Create pci mapping */
 421 static int dc390_pci_map (struct dc390_srb* pSRB)
 422 {
 423         int error = 0;
 424         struct scsi_cmnd *pcmd = pSRB->pcmd;
 425         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 426         dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 427
 428         /* Map sense buffer */
 429         if (pSRB->SRBFlag & AUTO_REQSENSE) {
 430                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
 431                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 432                                                      DMA_FROM_DEVICE);
 433                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 434
 435                 /* TODO: error handling */
 436                 if (pSRB->SGcount != 1)
 437                         error = 1;
 438                 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 439         /* Map SG list */
 440         } else if (pcmd->use_sg) {
 441                 pSRB->pSegmentList      = (struct scatterlist *) pcmd->request_buffer;
 442                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, pcmd->use_sg,
 443                                                      pcmd->sc_data_direction);
 444                 /* TODO: error handling */
 445                 if (!pSRB->SGcount)
 446                         error = 1;
 447                 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 448                               __FUNCTION__, pcmd->request_buffer, pSRB->SGcount, pcmd->use_sg));
 449         /* Map single segment */
 450         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 451                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->request_buffer, pcmd->request_bufflen);
 452                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 453                                                      pcmd->sc_data_direction);
 454                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 455
 456                 /* TODO: error handling */
 457                 if (pSRB->SGcount != 1)
 458                         error = 1;
 459                 DEBUG1(printk("%s(): Mapped request buffer %p at %x\n", __FUNCTION__, pcmd->request_buffer, cmdp->saved_dma_handle));
 460         /* No mapping !? */
 461         } else
 462                 pSRB->SGcount = 0;
 463
 464         return error;
 465 }
 466
 467 /* Remove pci mapping */
 468 static void dc390_pci_unmap (struct dc390_srb* pSRB)
 469 {
 470         struct scsi_cmnd *pcmd = pSRB->pcmd;
 471         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 472         DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 473
 474         if (pSRB->SRBFlag) {
 475                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 476                 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 477         } else if (pcmd->use_sg) {
 478                 pci_unmap_sg(pdev, pcmd->request_buffer, pcmd->use_sg, pcmd->sc_data_direction);
 479                 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n", __FUNCTION__, pcmd->request_buffer, pcmd->use_sg));
 480         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 481                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, pcmd->sc_data_direction);
 482                 DEBUG1(printk("%s(): Unmapped request buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 483         }
 484 }
 485
 486 static void __inline__
 487 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 488 {
 489         if (pSRB->TagNumber != SCSI_NO_TAG) {
 490                 pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 491                 pSRB->TagNumber = SCSI_NO_TAG;
 492         }
 493 }
 494
 495
 496 static int
 497 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 498 {
 499     struct scsi_cmnd *scmd = pSRB->pcmd;
 500     struct scsi_device *sdev = scmd->device;
 501     u8 cmd, disc_allowed, try_sync_nego;
 502     char tag[2];
 503
 504     pSRB->ScsiPhase = SCSI_NOP0;
 505
 506     if (pACB->Connected)
 507     {
 508         // Should not happen normally
 509         printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 510                 pSRB->SRBState, pSRB->SRBFlag);
 511         pSRB->SRBState = SRB_READY;
 512         pACB->SelConn++;
 513         return 1;
 514     }
 515     if (time_before (jiffies, pACB->pScsiHost->last_reset))
 516     {
 517         DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 518         return 1;
 519     }
 520     /* KG: Moved pci mapping here */
 521     dc390_pci_map(pSRB);
 522     /* TODO: error handling */
 523     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 524     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 525     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 526     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 527     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 528     DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 529     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 530     DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 531             scmd->cmnd[0], pDCB->SyncMode));
 532
 533     /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 534      * Contingent Allegiance Condition (6.6), where no tags should be used.
 535      * All other have to be allowed to disconnect to prevent Incorrect
 536      * Initiator Connection (6.8.2/6.5.2) */
 537     /* Changed KG, 99/06/06 */
 538     if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 539         disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 540     else
 541         disc_allowed = 0;
 542
 543     if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 544         (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 545           !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 546       try_sync_nego = 1;
 547     else
 548       try_sync_nego = 0;
 549
 550     pSRB->MsgCnt = 0;
 551     cmd = SEL_W_ATN;
 552     DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 553     /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 554     if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 555         DC390_write8(ScsiFifo, tag[0]);
 556         pDCB->TagMask |= 1 << tag[1];
 557         pSRB->TagNumber = tag[1];
 558         DC390_write8(ScsiFifo, tag[1]);
 559         DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->pid, pSRB, tag[1]));
 560         cmd = SEL_W_ATN3;
 561     } else {
 562         /* No TagQ */
 563 //no_tag:
 564         DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->pid, pSRB));
 565     }
 566
 567     pSRB->SRBState = SRB_START_;
 568
 569     if (try_sync_nego)
 570       {
 571         u8 Sync_Off = pDCB->SyncOffset;
 572         DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 573         pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 574         pSRB->MsgOutBuf[1] = 3;
 575         pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 576         pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 577         if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 578         pSRB->MsgOutBuf[4] = Sync_Off;
 579         pSRB->MsgCnt = 5;
 580         //pSRB->SRBState = SRB_MSGOUT_;
 581         pSRB->SRBState |= DO_SYNC_NEGO;
 582         cmd = SEL_W_ATN_STOP;
 583       }
 584
 585     /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 586     if (cmd != SEL_W_ATN_STOP)
 587       {
 588         if( pSRB->SRBFlag & AUTO_REQSENSE )
 589           {
 590             DC390_write8 (ScsiFifo, REQUEST_SENSE);
 591             DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 592             DC390_write8 (ScsiFifo, 0);
 593             DC390_write8 (ScsiFifo, 0);
 594             DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
 595             DC390_write8 (ScsiFifo, 0);
 596             DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 597           }
 598         else    /* write cmnd to bus */
 599           {
 600             u8 *ptr; u8 i;
 601             ptr = (u8 *)scmd->cmnd;
 602             for (i = 0; i < scmd->cmd_len; i++)
 603               DC390_write8 (ScsiFifo, *(ptr++));
 604           }
 605       }
 606     DEBUG0(if (pACB->pActiveDCB)        \
 607            printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 608     DEBUG0(if (pDCB->pActiveSRB)        \
 609            printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 610     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 611     if (DC390_read8 (Scsi_Status) & INTERRUPT)
 612     {
 613         dc390_freetag (pDCB, pSRB);
 614         DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
 615                 scmd->pid, scmd->device->id, scmd->device->lun));
 616         pSRB->SRBState = SRB_READY;
 617         //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 618         pACB->SelLost++;
 619         return 1;
 620     }
 621     DC390_write8 (ScsiCmd, cmd);
 622     pACB->pActiveDCB = pDCB;
 623     pDCB->pActiveSRB = pSRB;
 624     pACB->Connected = 1;
 625     pSRB->ScsiPhase = SCSI_NOP1;
 626     return 0;
 627 }
 628
 629 //#define DMA_INT EN_DMA_INT /*| EN_PAGE_INT*/
 630 #define DMA_INT 0
 631
 632 #if DMA_INT
 633 /* This is similar to AM53C974.c ... */
 634 static u8
 635 dc390_dma_intr (struct dc390_acb* pACB)
 636 {
 637   struct dc390_srb* pSRB;
 638   u8 dstate;
 639   DEBUG0(u16 pstate; struct pci_dev *pdev = pACB->pdev);
 640
 641   DEBUG0(pci_read_config_word(pdev, PCI_STATUS, &pstate));
 642   DEBUG0(if (pstate & (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY))\
 643         { printk(KERN_WARNING "DC390: PCI state = %04x!\n", pstate); \
 644           pci_write_config_word(pdev, PCI_STATUS, (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY));});
 645
 646   dstate = DC390_read8 (DMA_Status);
 647
 648   if (! pACB->pActiveDCB || ! pACB->pActiveDCB->pActiveSRB) return dstate;
 649   else pSRB  = pACB->pActiveDCB->pActiveSRB;
 650
 651   if (dstate & (DMA_XFER_ABORT | DMA_XFER_ERROR | POWER_DOWN | PCI_MS_ABORT))
 652     {
 653         printk (KERN_ERR "DC390: DMA error (%02x)!\n", dstate);
 654         return dstate;
 655     }
 656   if (dstate & DMA_XFER_DONE)
 657     {
 658         u32 residual, xferCnt; int ctr = 6000000;
 659         if (! (DC390_read8 (DMA_Cmd) & READ_DIRECTION))
 660           {
 661             do
 662               {
 663                 DEBUG1(printk (KERN_DEBUG "DC390: read residual bytes ... \n"));
 664                 dstate = DC390_read8 (DMA_Status);
 665                 residual = DC390_read8 (CtcReg_Low) | DC390_read8 (CtcReg_Mid) << 8 |
 666                   DC390_read8 (CtcReg_High) << 16;
 667                 residual += DC390_read8 (Current_Fifo) & 0x1f;
 668               } while (residual && ! (dstate & SCSI_INTERRUPT) && --ctr);
 669             if (!ctr) printk (KERN_CRIT "DC390: dma_intr: DMA aborted unfinished: %06x bytes remain!!\n", DC390_read32 (DMA_Wk_ByteCntr));
 670             /* residual =  ... */
 671           }
 672         else
 673             residual = 0;
 674
 675         /* ??? */
 676
 677         xferCnt = pSRB->SGToBeXferLen - residual;
 678         pSRB->SGBusAddr += xferCnt;
 679         pSRB->TotalXferredLen += xferCnt;
 680         pSRB->SGToBeXferLen = residual;
 681 # ifdef DC390_DEBUG0
 682         printk (KERN_INFO "DC390: DMA: residual = %i, xfer = %i\n",
 683                 (unsigned int)residual, (unsigned int)xferCnt);
 684 # endif
 685
 686         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 687     }
 688   dc390_laststatus &= ~0xff000000; dc390_laststatus |= dstate << 24;
 689   return dstate;
 690 }
 691 #endif
 692
 693
 694 static void __inline__
 695 dc390_InvalidCmd(struct dc390_acb* pACB)
 696 {
 697         if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 698                 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 699 }
 700
 701
 702 static irqreturn_t __inline__
 703 DC390_Interrupt(void *dev_id)
 704 {
 705     struct dc390_acb *pACB = dev_id;
 706     struct dc390_dcb *pDCB;
 707     struct dc390_srb *pSRB;
 708     u8  sstatus=0;
 709     u8  phase;
 710     void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 711     u8  istate, istatus;
 712 #if DMA_INT
 713     u8  dstatus;
 714 #endif
 715
 716     sstatus = DC390_read8 (Scsi_Status);
 717     if( !(sstatus & INTERRUPT) )
 718         return IRQ_NONE;
 719
 720     DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 721
 722 #if DMA_INT
 723     spin_lock_irq(pACB->pScsiHost->host_lock);
 724     dstatus = dc390_dma_intr (pACB);
 725     spin_unlock_irq(pACB->pScsiHost->host_lock);
 726
 727     DEBUG1(printk (KERN_DEBUG "dstatus=%02x,", dstatus));
 728     if (! (dstatus & SCSI_INTERRUPT))
 729       {
 730         DEBUG0(printk (KERN_WARNING "DC390 Int w/o SCSI actions (only DMA?)\n"));
 731         return IRQ_NONE;
 732       }
 733 #else
 734     //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 735     //dstatus = DC390_read8 (DMA_Status);
 736     //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 737 #endif
 738
 739     spin_lock_irq(pACB->pScsiHost->host_lock);
 740
 741     istate = DC390_read8 (Intern_State);
 742     istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 743
 744     DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 745     dc390_laststatus &= ~0x00ffffff;
 746     dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 747
 748     if (sstatus & ILLEGAL_OP_ERR)
 749     {
 750         printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 751         dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 752     }
 753
 754     else if (istatus &  INVALID_CMD)
 755     {
 756         printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 757         dc390_InvalidCmd( pACB );
 758         goto unlock;
 759     }
 760
 761     if (istatus &  SCSI_RESET)
 762     {
 763         dc390_ScsiRstDetect( pACB );
 764         goto unlock;
 765     }
 766
 767     if (istatus &  DISCONNECTED)
 768     {
 769         dc390_Disconnect( pACB );
 770         goto unlock;
 771     }
 772
 773     if (istatus &  RESELECTED)
 774     {
 775         dc390_Reselect( pACB );
 776         goto unlock;
 777     }
 778
 779     else if (istatus & (SELECTED | SEL_ATTENTION))
 780     {
 781         printk (KERN_ERR "DC390: Target mode not supported!\n");
 782         goto unlock;
 783     }
 784
 785     if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 786     {
 787         pDCB = pACB->pActiveDCB;
 788         if (!pDCB)
 789         {
 790                 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 791                 goto unlock;
 792         }
 793         pSRB = pDCB->pActiveSRB;
 794         if( pDCB->DCBFlag & ABORT_DEV_ )
 795           dc390_EnableMsgOut_Abort (pACB, pSRB);
 796
 797         phase = pSRB->ScsiPhase;
 798         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 799         stateV = (void *) dc390_phase0[phase];
 800         ( *stateV )( pACB, pSRB, &sstatus );
 801
 802         pSRB->ScsiPhase = sstatus & 7;
 803         phase = (u8) sstatus & 7;
 804         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 805         stateV = (void *) dc390_phase1[phase];
 806         ( *stateV )( pACB, pSRB, &sstatus );
 807     }
 808
 809  unlock:
 810     spin_unlock_irq(pACB->pScsiHost->host_lock);
 811     return IRQ_HANDLED;
 812 }
 813
 814 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
 815 {
 816     irqreturn_t ret;
 817     DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 818     /* Locking is done in DC390_Interrupt */
 819     ret = DC390_Interrupt(dev_id);
 820     DEBUG1(printk (".. IRQ returned\n"));
 821     return ret;
 822 }
 823
 824 static void
 825 dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 826 {
 827     u8   sstatus;
 828     struct scatterlist *psgl;
 829     u32    ResidCnt, xferCnt;
 830     u8   dstate = 0;
 831
 832     sstatus = *psstatus;
 833
 834     if( !(pSRB->SRBState & SRB_XFERPAD) )
 835     {
 836         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 837             pSRB->SRBStatus |= PARITY_ERROR;
 838
 839         if( sstatus & COUNT_2_ZERO )
 840         {
 841             unsigned long timeout = jiffies + HZ;
 842
 843             /* Function called from the ISR with the host_lock held and interrupts disabled */
 844             if (pSRB->SGToBeXferLen)
 845                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 846                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 847                     udelay(50);
 848                     spin_lock_irq(pACB->pScsiHost->host_lock);
 849                 }
 850             if (!time_before(jiffies, timeout))
 851                 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 852                         DC390_read32 (DMA_Wk_ByteCntr));
 853             dc390_laststatus &= ~0xff000000;
 854             dc390_laststatus |= dstate << 24;
 855             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 856             pSRB->SGIndex++;
 857             if( pSRB->SGIndex < pSRB->SGcount )
 858             {
 859                 pSRB->pSegmentList++;
 860                 psgl = pSRB->pSegmentList;
 861
 862                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 863                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 864             }
 865             else
 866                 pSRB->SGToBeXferLen = 0;
 867         }
 868         else
 869         {
 870             ResidCnt  = (u32) DC390_read8 (Current_Fifo) & 0x1f;
 871             ResidCnt |= (u32) DC390_read8 (CtcReg_High) << 16;
 872             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid) << 8;
 873             ResidCnt += (u32) DC390_read8 (CtcReg_Low);
 874
 875             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 876             pSRB->SGBusAddr += xferCnt;
 877             pSRB->TotalXferredLen += xferCnt;
 878             pSRB->SGToBeXferLen = ResidCnt;
 879         }
 880     }
 881     if ((*psstatus & 7) != SCSI_DATA_OUT)
 882     {
 883             DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 884             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 885     }
 886 }
 887
 888 static void
 889 dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 890 {
 891     u8   sstatus, residual, bval;
 892     struct scatterlist *psgl;
 893     u32    ResidCnt, i;
 894     unsigned long   xferCnt;
 895     u8      *ptr;
 896
 897     sstatus = *psstatus;
 898
 899     if( !(pSRB->SRBState & SRB_XFERPAD) )
 900     {
 901         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 902             pSRB->SRBStatus |= PARITY_ERROR;
 903
 904         if( sstatus & COUNT_2_ZERO )
 905         {
 906             int dstate = 0;
 907             unsigned long timeout = jiffies + HZ;
 908
 909             /* Function called from the ISR with the host_lock held and interrupts disabled */
 910             if (pSRB->SGToBeXferLen)
 911                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 912                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 913                     udelay(50);
 914                     spin_lock_irq(pACB->pScsiHost->host_lock);
 915                 }
 916             if (!time_before(jiffies, timeout)) {
 917                 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 918                         DC390_read32 (DMA_Wk_ByteCntr));
 919                 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 920             }
 921             dc390_laststatus &= ~0xff000000;
 922             dc390_laststatus |= dstate << 24;
 923             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 924                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 925                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
 926             DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%i,ToBeXfer=%li),", ResidCnt, pSRB->SGToBeXferLen));
 927
 928             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 929
 930             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 931             pSRB->SGIndex++;
 932             if( pSRB->SGIndex < pSRB->SGcount )
 933             {
 934                 pSRB->pSegmentList++;
 935                 psgl = pSRB->pSegmentList;
 936
 937                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 938                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 939             }
 940             else
 941                 pSRB->SGToBeXferLen = 0;
 942         }
 943         else    /* phase changed */
 944         {
 945             residual = 0;
 946             bval = DC390_read8 (Current_Fifo);
 947             while( bval & 0x1f )
 948             {
 949                 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 950                 if( (bval & 0x1f) == 1 )
 951                 {
 952                     for(i=0; i < 0x100; i++)
 953                     {
 954                         bval = DC390_read8 (Current_Fifo);
 955                         if( !(bval & 0x1f) )
 956                             goto din_1;
 957                         else if( i == 0x0ff )
 958                         {
 959                             residual = 1;   /* ;1 residual byte */
 960                             goto din_1;
 961                         }
 962                     }
 963                 }
 964                 else
 965                     bval = DC390_read8 (Current_Fifo);
 966             }
 967 din_1:
 968             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 969             for (i = 0xa000; i; i--)
 970             {
 971                 bval = DC390_read8 (DMA_Status);
 972                 if (bval & BLAST_COMPLETE)
 973                     break;
 974             }
 975             /* It seems a DMA Blast abort isn't that bad ... */
 976             if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 977             //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 978             dc390_laststatus &= ~0xff000000; dc390_laststatus |= bval << 24;
 979
 980             DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
 981             ResidCnt = (u32) DC390_read8 (CtcReg_High);
 982             ResidCnt <<= 8;
 983             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid);
 984             ResidCnt <<= 8;
 985             ResidCnt |= (u32) DC390_read8 (CtcReg_Low);
 986
 987             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 988             pSRB->SGBusAddr += xferCnt;
 989             pSRB->TotalXferredLen += xferCnt;
 990             pSRB->SGToBeXferLen = ResidCnt;
 991
 992             if( residual )
 993             {
 994                 static int feedback_requested;
 995                 bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 996
 997                 if (!feedback_requested) {
 998                         feedback_requested = 1;
 999                         printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
1000                                "to help improve support for your system.\n", __FILE__);
1001                 }
1002
1003                 ptr = (u8 *) bus_to_virt( pSRB->SGBusAddr );
1004                 *ptr = bval;
1005                 pSRB->SGBusAddr++; xferCnt++;
1006                 pSRB->TotalXferredLen++;
1007                 pSRB->SGToBeXferLen--;
1008             }
1009             DEBUG1(printk (KERN_DEBUG "Xfered: %li, Total: %li, Remaining: %li\n", xferCnt,\
1010                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
1011
1012         }
1013     }
1014     if ((*psstatus & 7) != SCSI_DATA_IN)
1015     {
1016             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1017             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
1018     }
1019 }
1020
1021 static void
1022 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1023 {
1024 }
1025
1026 static void
1027 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1028 {
1029
1030     pSRB->TargetStatus = DC390_read8 (ScsiFifo);
1031     //udelay (1);
1032     pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
1033
1034     *psstatus = SCSI_NOP0;
1035     pSRB->SRBState = SRB_COMPLETED;
1036     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1037 }
1038
1039 static void
1040 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1041 {
1042     if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
1043         *psstatus = SCSI_NOP0;
1044     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1045 }
1046
1047
1048 static void __inline__
1049 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
1050 {
1051   DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1052   DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1053   DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1054   DC390_write8 (CtrlReg4, pDCB->CtrlR4);
1055   dc390_SetXferRate (pACB, pDCB);
1056 }
1057
1058
1059 #ifdef DC390_DEBUG0
1060 static void
1061 dc390_printMsg (u8 *MsgBuf, u8 len)
1062 {
1063   int i;
1064   printk (" %02x", MsgBuf[0]);
1065   for (i = 1; i < len; i++)
1066     printk (" %02x", MsgBuf[i]);
1067   printk ("\n");
1068 }
1069 #endif
1070
1071 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
1072
1073 /* reject_msg */
1074 static void __inline__
1075 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1076 {
1077   pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
1078   pSRB->MsgCnt = 1;
1079   DC390_ENABLE_MSGOUT;
1080   DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
1081 }
1082
1083 /* abort command */
1084 static void
1085 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1086 {
1087     pSRB->MsgOutBuf[0] = ABORT;
1088     pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1089     pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1090 }
1091
1092 static struct dc390_srb*
1093 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1094 {
1095   struct dc390_srb* pSRB = pDCB->pGoingSRB;
1096
1097   if (pSRB)
1098     {
1099         struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1100         pSRB = (struct dc390_srb *)scmd->host_scribble;
1101
1102         if (pDCB->DCBFlag & ABORT_DEV_)
1103         {
1104           pSRB->SRBState = SRB_ABORT_SENT;
1105           dc390_EnableMsgOut_Abort( pACB, pSRB );
1106         }
1107
1108         if (!(pSRB->SRBState & SRB_DISCONNECT))
1109                 goto mingx0;
1110
1111         pDCB->pActiveSRB = pSRB;
1112         pSRB->SRBState = SRB_DATA_XFER;
1113     }
1114   else
1115     {
1116     mingx0:
1117       pSRB = pACB->pTmpSRB;
1118       pSRB->SRBState = SRB_UNEXPECT_RESEL;
1119       pDCB->pActiveSRB = pSRB;
1120       pSRB->MsgOutBuf[0] = ABORT_TAG;
1121       pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1122     }
1123   return pSRB;
1124 }
1125
1126
1127 /* set async transfer mode */
1128 static void
1129 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1130 {
1131   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1132   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1133     printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1134   pSRB->SRBState &= ~DO_SYNC_NEGO;
1135   pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1136   pDCB->SyncPeriod = 0;
1137   pDCB->SyncOffset = 0;
1138   //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1139   pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1140   pDCB->CtrlR4 &= 0x3f;
1141   pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1142   dc390_reprog (pACB, pDCB);
1143 }
1144
1145 /* set sync transfer mode */
1146 static void
1147 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1148 {
1149   u8 bval;
1150   u16 wval, wval1;
1151   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1152   u8 oldsyncperiod = pDCB->SyncPeriod;
1153   u8 oldsyncoffset = pDCB->SyncOffset;
1154
1155   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1156     {
1157       printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1158               pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1159
1160       /* reject */
1161       //dc390_MsgIn_reject (pACB, pSRB);
1162       //return dc390_MsgIn_set_async (pACB, pSRB);
1163
1164       /* Reply with corrected SDTR Message */
1165       if (pSRB->MsgInBuf[4] > 15)
1166         {
1167           printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1168           pSRB->MsgInBuf[4] = 15;
1169         }
1170       if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1171         {
1172           printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1173           pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1174         }
1175       memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1176       pSRB->MsgCnt = 5;
1177       DC390_ENABLE_MSGOUT;
1178     }
1179
1180   pSRB->SRBState &= ~DO_SYNC_NEGO;
1181   pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1182   pDCB->SyncOffset &= 0x0f0;
1183   pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1184   pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1185
1186   wval = (u16) pSRB->MsgInBuf[3];
1187   wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1188   if( (wval1 * 25) != wval) wval1++;
1189   bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1190
1191   pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1192   if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1193     pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1194   else
1195     pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1196   if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1197
1198   if (wval1 >= 8)
1199     {
1200       wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1201       bval = FAST_CLK;          /* fast clock / normal scsi */
1202       pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1203     }
1204
1205   pDCB->CtrlR3 = bval;
1206   pDCB->SyncPeriod = (u8)wval1;
1207
1208   if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1209     {
1210       if (! (bval & FAST_SCSI)) wval1++;
1211       printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1212               40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1213     }
1214
1215   dc390_reprog (pACB, pDCB);
1216 }
1217
1218
1219 /* handle RESTORE_PTR */
1220 /* I presume, this command is already mapped, so, have to remap. */
1221 static void
1222 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1223 {
1224     struct scsi_cmnd *pcmd = pSRB->pcmd;
1225     struct scatterlist *psgl;
1226     pSRB->TotalXferredLen = 0;
1227     pSRB->SGIndex = 0;
1228     if (pcmd->use_sg) {
1229         pSRB->pSegmentList = (struct scatterlist *)pcmd->request_buffer;
1230         psgl = pSRB->pSegmentList;
1231         //dc390_pci_sync(pSRB);
1232
1233         while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1234         {
1235             pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1236             pSRB->SGIndex++;
1237             if( pSRB->SGIndex < pSRB->SGcount )
1238             {
1239                 pSRB->pSegmentList++;
1240                 psgl = pSRB->pSegmentList;
1241                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1242                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1243             }
1244             else
1245                 pSRB->SGToBeXferLen = 0;
1246         }
1247         pSRB->SGToBeXferLen -= (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1248         pSRB->SGBusAddr += (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1249         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1250                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1251
1252     } else if(pcmd->request_buffer) {
1253         //dc390_pci_sync(pSRB);
1254
1255         sg_dma_len(&pSRB->Segmentx) = pcmd->request_bufflen - pSRB->Saved_Ptr;
1256         pSRB->SGcount = 1;
1257         pSRB->pSegmentList = (struct scatterlist *) &pSRB->Segmentx;
1258     } else {
1259          pSRB->SGcount = 0;
1260          printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1261     }
1262
1263   pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1264 }
1265
1266
1267 /* According to the docs, the AM53C974 reads the message and
1268  * generates a Successful Operation IRQ before asserting ACK for
1269  * the last byte (how does it know whether it's the last ?) */
1270 /* The old code handled it in another way, indicating, that on
1271  * every message byte an IRQ is generated and every byte has to
1272  * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1273 /* The old implementation was correct. Sigh! */
1274
1275 /* Check if the message is complete */
1276 static u8 __inline__
1277 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1278 {
1279   if (*msgbuf == EXTENDED_MESSAGE)
1280   {
1281         if (len < 2) return 0;
1282         if (len < msgbuf[1] + 2) return 0;
1283   }
1284   else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1285         if (len < 2) return 0;
1286   return 1;
1287 }
1288
1289
1290
1291 /* read and eval received messages */
1292 static void
1293 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1294 {
1295     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1296
1297     /* Read the msg */
1298
1299     pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1300     //pSRB->SRBState = 0;
1301
1302     /* Msg complete ? */
1303     if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1304       {
1305         DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1306         /* Now eval the msg */
1307         switch (pSRB->MsgInBuf[0])
1308           {
1309           case DISCONNECT:
1310             pSRB->SRBState = SRB_DISCONNECT; break;
1311
1312           case SIMPLE_QUEUE_TAG:
1313           case HEAD_OF_QUEUE_TAG:
1314           case ORDERED_QUEUE_TAG:
1315             pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1316             break;
1317
1318           case MESSAGE_REJECT:
1319             DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1320             pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1321             if( pSRB->SRBState & DO_SYNC_NEGO)
1322               dc390_MsgIn_set_async (pACB, pSRB);
1323             break;
1324
1325           case EXTENDED_MESSAGE:
1326             /* reject every extended msg but SDTR */
1327             if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1328               dc390_MsgIn_reject (pACB, pSRB);
1329             else
1330               {
1331                 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1332                   dc390_MsgIn_set_async (pACB, pSRB);
1333                 else
1334                   dc390_MsgIn_set_sync (pACB, pSRB);
1335               }
1336
1337             // nothing has to be done
1338           case COMMAND_COMPLETE: break;
1339
1340             // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1341             // scsi command. Thanks, Gerard, for pointing it out.
1342           case SAVE_POINTERS:
1343             pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1344             break;
1345             // The device might want to restart transfer with a RESTORE
1346           case RESTORE_POINTERS:
1347             DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1348             dc390_restore_ptr (pACB, pSRB);
1349             break;
1350
1351             // reject unknown messages
1352           default: dc390_MsgIn_reject (pACB, pSRB);
1353           }
1354
1355         /* Clear counter and MsgIn state */
1356         pSRB->SRBState &= ~SRB_MSGIN;
1357         pACB->MsgLen = 0;
1358       }
1359
1360     *psstatus = SCSI_NOP0;
1361     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1362     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1363 }
1364
1365
1366 static void
1367 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1368 {
1369     struct scatterlist *psgl;
1370     unsigned long  lval;
1371     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1372
1373     if (pSRB == pACB->pTmpSRB)
1374     {
1375         if (pDCB)
1376                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1377         else
1378                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1379
1380         /* Try to recover - some broken disks react badly to tagged INQUIRY */
1381         if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1382                 pSRB = pDCB->pGoingSRB;
1383                 pDCB->pActiveSRB = pSRB;
1384         } else {
1385                 pSRB->pSRBDCB = pDCB;
1386                 dc390_EnableMsgOut_Abort(pACB, pSRB);
1387                 if (pDCB)
1388                         pDCB->DCBFlag |= ABORT_DEV;
1389                 return;
1390         }
1391     }
1392
1393     if( pSRB->SGIndex < pSRB->SGcount )
1394     {
1395         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir /* | DMA_INT */);
1396         if( !pSRB->SGToBeXferLen )
1397         {
1398             psgl = pSRB->pSegmentList;
1399             pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1400             pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1401             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1402         }
1403         lval = pSRB->SGToBeXferLen;
1404         DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1405         DC390_write8 (CtcReg_Low, (u8) lval);
1406         lval >>= 8;
1407         DC390_write8 (CtcReg_Mid, (u8) lval);
1408         lval >>= 8;
1409         DC390_write8 (CtcReg_High, (u8) lval);
1410
1411         DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1412         DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1413
1414         //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); /* | DMA_INT; */
1415         pSRB->SRBState = SRB_DATA_XFER;
1416
1417         DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1418
1419         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT);
1420         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1421         //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1422         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1423     }
1424     else    /* xfer pad */
1425     {
1426         if( pSRB->SGcount )
1427         {
1428             pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1429             pSRB->SRBStatus |= OVER_RUN;
1430             DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1431         }
1432         DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1433         DC390_write8 (CtcReg_Low, 0);
1434         DC390_write8 (CtcReg_Mid, 0);
1435         DC390_write8 (CtcReg_High, 0);
1436
1437         pSRB->SRBState |= SRB_XFERPAD;
1438         DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1439 /*
1440         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); // | DMA_INT;
1441         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT);
1442 */
1443     }
1444 }
1445
1446
1447 static void
1448 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1449 {
1450     dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1451 }
1452
1453 static void
1454 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1455 {
1456     dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1457 }
1458
1459 static void
1460 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1461 {
1462     struct dc390_dcb*   pDCB;
1463     u8  i, cnt;
1464     u8     *ptr;
1465
1466     DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1467     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1468     if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1469     {
1470         cnt = (u8) pSRB->pcmd->cmd_len;
1471         ptr = (u8 *) pSRB->pcmd->cmnd;
1472         for(i=0; i < cnt; i++)
1473             DC390_write8 (ScsiFifo, *(ptr++));
1474     }
1475     else
1476     {
1477         DC390_write8 (ScsiFifo, REQUEST_SENSE);
1478         pDCB = pACB->pActiveDCB;
1479         DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1480         DC390_write8 (ScsiFifo, 0);
1481         DC390_write8 (ScsiFifo, 0);
1482         DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1483         DC390_write8 (ScsiFifo, 0);
1484         DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1485     }
1486     pSRB->SRBState = SRB_COMMAND;
1487     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1488 }
1489
1490 static void
1491 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1492 {
1493     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1494     pSRB->SRBState = SRB_STATUS;
1495     DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1496     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1497 }
1498
1499 static void
1500 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1501 {
1502     u8   bval, i, cnt;
1503     u8     *ptr;
1504     struct dc390_dcb*    pDCB;
1505
1506     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1507     pDCB = pACB->pActiveDCB;
1508     if( !(pSRB->SRBState & SRB_MSGOUT) )
1509     {
1510         cnt = pSRB->MsgCnt;
1511         if( cnt )
1512         {
1513             ptr = (u8 *) pSRB->MsgOutBuf;
1514             for(i=0; i < cnt; i++)
1515                 DC390_write8 (ScsiFifo, *(ptr++));
1516             pSRB->MsgCnt = 0;
1517             if( (pDCB->DCBFlag & ABORT_DEV_) &&
1518                 (pSRB->MsgOutBuf[0] == ABORT) )
1519                 pSRB->SRBState = SRB_ABORT_SENT;
1520         }
1521         else
1522         {
1523             bval = ABORT;       /* ??? MSG_NOP */
1524             if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1525                 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1526                 (pSRB->SRBFlag & AUTO_REQSENSE) )
1527             {
1528                 if( pDCB->SyncMode & SYNC_ENABLE )
1529                     goto  mop1;
1530             }
1531             DC390_write8 (ScsiFifo, bval);
1532         }
1533         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1534     }
1535     else
1536     {
1537 mop1:
1538         printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1539         DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1540         DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1541         DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1542         DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1543         if (pDCB->SyncOffset & 0x0f)
1544                     DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1545         else
1546                     DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1547         pSRB->SRBState |= DO_SYNC_NEGO;
1548         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1549     }
1550 }
1551
1552 static void
1553 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1554 {
1555     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1556     if( !(pSRB->SRBState & SRB_MSGIN) )
1557     {
1558         pSRB->SRBState &= ~SRB_DISCONNECT;
1559         pSRB->SRBState |= SRB_MSGIN;
1560     }
1561     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1562     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1563 }
1564
1565 static void
1566 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1567 {
1568 }
1569
1570 static void
1571 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1572 {
1573 }
1574
1575
1576 static void
1577 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1578 {
1579     u8  bval, i, cnt;
1580     struct dc390_dcb*   ptr;
1581
1582     if( !(pDCB->TargetLUN) )
1583     {
1584         if( !pACB->scan_devices )
1585         {
1586             ptr = pACB->pLinkDCB;
1587             cnt = pACB->DCBCnt;
1588             bval = pDCB->TargetID;
1589             for(i=0; i<cnt; i++)
1590             {
1591                 if( ptr->TargetID == bval )
1592                 {
1593                     ptr->SyncPeriod = pDCB->SyncPeriod;
1594                     ptr->SyncOffset = pDCB->SyncOffset;
1595                     ptr->CtrlR3 = pDCB->CtrlR3;
1596                     ptr->CtrlR4 = pDCB->CtrlR4;
1597                     ptr->SyncMode = pDCB->SyncMode;
1598                 }
1599                 ptr = ptr->pNextDCB;
1600             }
1601         }
1602     }
1603     return;
1604 }
1605
1606
1607 static void
1608 dc390_Disconnect( struct dc390_acb* pACB )
1609 {
1610     struct dc390_dcb *pDCB;
1611     struct dc390_srb *pSRB, *psrb;
1612     u8  i, cnt;
1613
1614     DEBUG0(printk(KERN_INFO "DISC,"));
1615
1616     if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1617     pACB->Connected = 0;
1618     pDCB = pACB->pActiveDCB;
1619     if (!pDCB)
1620      {
1621         DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1622                pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1623         mdelay(400);
1624         DC390_read8 (INT_Status);       /* Reset Pending INT */
1625         DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1626         return;
1627      }
1628     DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1629     pSRB = pDCB->pActiveSRB;
1630     pACB->pActiveDCB = NULL;
1631     pSRB->ScsiPhase = SCSI_NOP0;
1632     if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1633         pSRB->SRBState = 0;
1634     else if( pSRB->SRBState & SRB_ABORT_SENT )
1635     {
1636         pDCB->TagMask = 0;
1637         pDCB->DCBFlag = 0;
1638         cnt = pDCB->GoingSRBCnt;
1639         pDCB->GoingSRBCnt = 0;
1640         pSRB = pDCB->pGoingSRB;
1641         for( i=0; i < cnt; i++)
1642         {
1643             psrb = pSRB->pNextSRB;
1644             dc390_Free_insert (pACB, pSRB);
1645             pSRB = psrb;
1646         }
1647         pDCB->pGoingSRB = NULL;
1648     }
1649     else
1650     {
1651         if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1652            !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1653         {       /* Selection time out */
1654                 pSRB->TargetStatus = SCSI_STAT_SEL_TIMEOUT;
1655                 goto  disc1;
1656         }
1657         else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1658         {
1659 disc1:
1660             dc390_freetag (pDCB, pSRB);
1661             pDCB->pActiveSRB = NULL;
1662             pSRB->SRBState = SRB_FREE;
1663             dc390_SRBdone( pACB, pDCB, pSRB);
1664         }
1665     }
1666     pACB->MsgLen = 0;
1667 }
1668
1669
1670 static void
1671 dc390_Reselect( struct dc390_acb* pACB )
1672 {
1673     struct dc390_dcb*   pDCB;
1674     struct dc390_srb*   pSRB;
1675     u8  id, lun;
1676
1677     DEBUG0(printk(KERN_INFO "RSEL,"));
1678     pACB->Connected = 1;
1679     pDCB = pACB->pActiveDCB;
1680     if( pDCB )
1681     {   /* Arbitration lost but Reselection won */
1682         DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1683         pSRB = pDCB->pActiveSRB;
1684         if( !( pACB->scan_devices ) )
1685         {
1686             struct scsi_cmnd *pcmd = pSRB->pcmd;
1687             pcmd->resid = pcmd->request_bufflen;
1688             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1689             dc390_Going_remove(pDCB, pSRB);
1690             dc390_Free_insert(pACB, pSRB);
1691             pcmd->scsi_done (pcmd);
1692             DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1693         }
1694     }
1695     /* Get ID */
1696     lun = DC390_read8 (ScsiFifo);
1697     DEBUG0(printk ("Dev %02x,", lun));
1698     if (!(lun & (1 << pACB->pScsiHost->this_id)))
1699       printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1700     else
1701       lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1702     id = 0; while (lun >>= 1) id++;
1703     /* Get LUN */
1704     lun = DC390_read8 (ScsiFifo);
1705     if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1706     lun &= 7;
1707     DEBUG0(printk ("(%02i-%i),", id, lun));
1708     pDCB = dc390_findDCB (pACB, id, lun);
1709     if (!pDCB)
1710     {
1711         printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1712                     id, lun);
1713         return;
1714     }
1715     pACB->pActiveDCB = pDCB;
1716     /* TagQ: We expect a message soon, so never mind the exact SRB */
1717     if( pDCB->SyncMode & EN_TAG_QUEUEING )
1718     {
1719         pSRB = pACB->pTmpSRB;
1720         pDCB->pActiveSRB = pSRB;
1721     }
1722     else
1723     {
1724         pSRB = pDCB->pActiveSRB;
1725         if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1726         {
1727             pSRB= pACB->pTmpSRB;
1728             pSRB->SRBState = SRB_UNEXPECT_RESEL;
1729             printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1730                     id, lun);
1731             pDCB->pActiveSRB = pSRB;
1732             dc390_EnableMsgOut_Abort ( pACB, pSRB );
1733         }
1734         else
1735         {
1736             if( pDCB->DCBFlag & ABORT_DEV_ )
1737             {
1738                 pSRB->SRBState = SRB_ABORT_SENT;
1739                 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1740                         id, lun);
1741                 dc390_EnableMsgOut_Abort( pACB, pSRB );
1742             }
1743             else
1744                 pSRB->SRBState = SRB_DATA_XFER;
1745         }
1746     }
1747
1748     DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1749     pSRB->ScsiPhase = SCSI_NOP0;
1750     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1751     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1752     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1753     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1754     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1755     DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1756     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1757 }
1758
1759 static int __inline__
1760 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1761 {
1762         struct scsi_cmnd *pcmd;
1763
1764         pcmd = pSRB->pcmd;
1765
1766         REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1767                               pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1768
1769         pSRB->SRBFlag |= AUTO_REQSENSE;
1770         pSRB->SavedSGCount = pcmd->use_sg;
1771         pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1772         pSRB->AdaptStatus = 0;
1773         pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1774
1775         /* We are called from SRBdone, original PCI mapping has been removed
1776          * already, new one is set up from StartSCSI */
1777         pSRB->SGIndex = 0;
1778
1779         pSRB->TotalXferredLen = 0;
1780         pSRB->SGToBeXferLen = 0;
1781         return dc390_StartSCSI(pACB, pDCB, pSRB);
1782 }
1783
1784
1785 static void
1786 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1787 {
1788     u8 status;
1789     struct scsi_cmnd *pcmd;
1790
1791     pcmd = pSRB->pcmd;
1792     /* KG: Moved pci_unmap here */
1793     dc390_pci_unmap(pSRB);
1794
1795     status = pSRB->TargetStatus;
1796
1797     DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1798                 pSRB, pcmd->pid));
1799     if(pSRB->SRBFlag & AUTO_REQSENSE)
1800     {   /* Last command was a Request Sense */
1801         pSRB->SRBFlag &= ~AUTO_REQSENSE;
1802         pSRB->AdaptStatus = 0;
1803         pSRB->TargetStatus = CHECK_CONDITION << 1;
1804
1805         //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1806         if (status == (CHECK_CONDITION << 1))
1807             pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1808         else /* Retry */
1809         {
1810             if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1811             {
1812                 /* Don't retry on TEST_UNIT_READY */
1813                 pcmd->result = MK_RES_LNX(DRIVER_SENSE,DID_OK,0,CHECK_CONDITION);
1814                 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1815                        (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1816             } else {
1817                 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1818                 pcmd->use_sg = pSRB->SavedSGCount;
1819                 //pSRB->ScsiCmdLen       = (u8) (pSRB->Segment1[0] >> 8);
1820                 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1821                 pSRB->TotalXferredLen = 0;
1822                 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1823             }
1824         }
1825         goto cmd_done;
1826     }
1827     if( status )
1828     {
1829         if( status_byte(status) == CHECK_CONDITION )
1830         {
1831             if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1832                 SET_RES_DID(pcmd->result, DID_ERROR);
1833                 goto cmd_done;
1834             }
1835             return;
1836         }
1837         else if( status_byte(status) == QUEUE_FULL )
1838         {
1839             scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1840             pcmd->use_sg = pSRB->SavedSGCount;
1841             DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1842             pSRB->TotalXferredLen = 0;
1843             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1844         }
1845         else if(status == SCSI_STAT_SEL_TIMEOUT)
1846         {
1847             pSRB->AdaptStatus = H_SEL_TIMEOUT;
1848             pSRB->TargetStatus = 0;
1849             pcmd->result = MK_RES(0,DID_NO_CONNECT,0,0);
1850             /* Devices are removed below ... */
1851         }
1852         else if (status_byte(status) == BUSY &&
1853                  (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1854                  pACB->scan_devices)
1855         {
1856             pSRB->AdaptStatus = 0;
1857             pSRB->TargetStatus = status;
1858             pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1859         }
1860         else
1861         {   /* Another error */
1862             pSRB->TotalXferredLen = 0;
1863             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1864             goto cmd_done;
1865         }
1866     }
1867     else
1868     {   /*  Target status == 0 */
1869         status = pSRB->AdaptStatus;
1870         if(status & H_OVER_UNDER_RUN)
1871         {
1872             pSRB->TargetStatus = 0;
1873             SET_RES_DID(pcmd->result,DID_OK);
1874             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1875         }
1876         else if( pSRB->SRBStatus & PARITY_ERROR)
1877         {
1878             //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1879             SET_RES_DID(pcmd->result,DID_PARITY);
1880             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1881         }
1882         else                   /* No error */
1883         {
1884             pSRB->AdaptStatus = 0;
1885             pSRB->TargetStatus = 0;
1886             SET_RES_DID(pcmd->result,DID_OK);
1887         }
1888     }
1889
1890 cmd_done:
1891     pcmd->resid = pcmd->request_bufflen - pSRB->TotalXferredLen;
1892
1893     dc390_Going_remove (pDCB, pSRB);
1894     /* Add to free list */
1895     dc390_Free_insert (pACB, pSRB);
1896
1897     DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->pid));
1898     pcmd->scsi_done (pcmd);
1899
1900     return;
1901 }
1902
1903
1904 /* Remove all SRBs from Going list and inform midlevel */
1905 static void
1906 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1907 {
1908     struct dc390_dcb *pDCB, *pdcb;
1909     struct dc390_srb *psrb, *psrb2;
1910     int i;
1911     struct scsi_cmnd *pcmd;
1912
1913     pDCB = pACB->pLinkDCB;
1914     pdcb = pDCB;
1915     if (! pdcb) return;
1916     do
1917     {
1918         psrb = pdcb->pGoingSRB;
1919         for (i = 0; i < pdcb->GoingSRBCnt; i++)
1920         {
1921             psrb2 = psrb->pNextSRB;
1922             pcmd = psrb->pcmd;
1923             dc390_Free_insert (pACB, psrb);
1924             psrb  = psrb2;
1925         }
1926         pdcb->GoingSRBCnt = 0;
1927         pdcb->pGoingSRB = NULL;
1928         pdcb->TagMask = 0;
1929         pdcb = pdcb->pNextDCB;
1930     } while( pdcb != pDCB );
1931 }
1932
1933
1934 static void
1935 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1936 {
1937     //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1938     //udelay (250);
1939     //DC390_write8 (ScsiCmd, NOP_CMD);
1940
1941     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1942     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1943     DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1944     pACB->Connected = 0;
1945
1946     return;
1947 }
1948
1949 static void
1950 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1951 {
1952     printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1953     //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1954
1955     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1956     /* Unlock before ? */
1957     /* delay half a second */
1958     udelay (1000);
1959     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1960     pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1961                     + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1962     pACB->Connected = 0;
1963
1964     if( pACB->ACBFlag & RESET_DEV )
1965         pACB->ACBFlag |= RESET_DONE;
1966     else
1967     {   /* Reset was issued by sb else */
1968         pACB->ACBFlag |= RESET_DETECT;
1969
1970         dc390_ResetDevParam( pACB );
1971         dc390_DoingSRB_Done( pACB, NULL);
1972         //dc390_RecoverSRB( pACB );
1973         pACB->pActiveDCB = NULL;
1974         pACB->ACBFlag = 0;
1975     }
1976     return;
1977 }
1978
1979 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1980                 void (*done)(struct scsi_cmnd *))
1981 {
1982         struct scsi_device *sdev = cmd->device;
1983         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1984         struct dc390_dcb *dcb = sdev->hostdata;
1985         struct dc390_srb *srb;
1986
1987         if (sdev->queue_depth <= dcb->GoingSRBCnt)
1988                 goto device_busy;
1989         if (acb->pActiveDCB)
1990                 goto host_busy;
1991         if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1992                 goto host_busy;
1993
1994         srb = acb->pFreeSRB;
1995         if (unlikely(srb == NULL))
1996                 goto host_busy;
1997
1998         cmd->scsi_done = done;
1999         cmd->result = 0;
2000         acb->Cmds++;
2001
2002         acb->pFreeSRB = srb->pNextSRB;
2003         srb->pNextSRB = NULL;
2004
2005         srb->pSRBDCB = dcb;
2006         srb->pcmd = cmd;
2007         cmd->host_scribble = (char *)srb;
2008
2009         srb->SGIndex = 0;
2010         srb->AdaptStatus = 0;
2011         srb->TargetStatus = 0;
2012         srb->MsgCnt = 0;
2013
2014         srb->SRBStatus = 0;
2015         srb->SRBFlag = 0;
2016         srb->SRBState = 0;
2017         srb->TotalXferredLen = 0;
2018         srb->SGBusAddr = 0;
2019         srb->SGToBeXferLen = 0;
2020         srb->ScsiPhase = 0;
2021         srb->EndMessage = 0;
2022         srb->TagNumber = SCSI_NO_TAG;
2023
2024         if (dc390_StartSCSI(acb, dcb, srb)) {
2025                 dc390_Free_insert(acb, srb);
2026                 goto host_busy;
2027         }
2028
2029         dc390_Going_append(dcb, srb);
2030
2031         return 0;
2032
2033  host_busy:
2034         return SCSI_MLQUEUE_HOST_BUSY;
2035
2036  device_busy:
2037         return SCSI_MLQUEUE_DEVICE_BUSY;
2038 }
2039
2040 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
2041 {
2042     struct pci_dev *pdev;
2043     u16 pstat;
2044
2045     if (!pDCB) pDCB = pACB->pActiveDCB;
2046     if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
2047
2048     if (pSRB)
2049     {
2050         printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
2051                 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
2052                 pSRB->ScsiPhase);
2053         printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
2054     }
2055     printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
2056     printk ("DC390: Register dump: SCSI block:\n");
2057     printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
2058     printk ("DC390:  %06x   %02x   %02x   %02x",
2059             DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
2060             DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
2061     printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
2062             DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
2063             DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
2064     DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
2065     if (DC390_read8(Current_Fifo) & 0x1f)
2066       {
2067         printk ("DC390: FIFO:");
2068         while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
2069         printk ("\n");
2070       }
2071     printk ("DC390: Register dump: DMA engine:\n");
2072     printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
2073     printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
2074             DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
2075             DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
2076             DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
2077     DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2078
2079     pdev = pACB->pdev;
2080     pci_read_config_word(pdev, PCI_STATUS, &pstat);
2081     printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
2082     printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
2083 }
2084
2085
2086 static int DC390_abort(struct scsi_cmnd *cmd)
2087 {
2088         struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2089         struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
2090
2091         scmd_printk(KERN_WARNING, cmd,
2092                 "DC390: Abort command (pid %li)\n", cmd->pid);
2093
2094         /* abort() is too stupid for already sent commands at the moment.
2095          * If it's called we are in trouble anyway, so let's dump some info
2096          * into the syslog at least. (KG, 98/08/20,99/06/20) */
2097         dc390_dumpinfo(pACB, pDCB, NULL);
2098
2099         pDCB->DCBFlag |= ABORT_DEV_;
2100         printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->pid);
2101
2102         return FAILED;
2103 }
2104
2105
2106 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2107 {
2108     struct dc390_dcb *pDCB, *pdcb;
2109
2110     pDCB = pACB->pLinkDCB;
2111     if (! pDCB) return;
2112     pdcb = pDCB;
2113     do
2114     {
2115         pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2116         pDCB->SyncPeriod = 0;
2117         pDCB->SyncOffset = 0;
2118         pDCB->TagMask = 0;
2119         pDCB->CtrlR3 = FAST_CLK;
2120         pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2121         pDCB->CtrlR4 |= pACB->glitch_cfg;
2122         pDCB = pDCB->pNextDCB;
2123     }
2124     while( pdcb != pDCB );
2125     pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2126
2127 }
2128
2129 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2130 {
2131         struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2132         u8   bval;
2133
2134         spin_lock_irq(cmd->device->host->host_lock);
2135
2136         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2137         DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2138
2139         pACB->ACBFlag |= RESET_DEV;
2140         dc390_ResetSCSIBus(pACB);
2141
2142         dc390_ResetDevParam(pACB);
2143         mdelay(1);
2144         pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2145                 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2146
2147         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2148         DC390_read8(INT_Status);                /* Reset Pending INT */
2149
2150         dc390_DoingSRB_Done(pACB, cmd);
2151
2152         pACB->pActiveDCB = NULL;
2153         pACB->ACBFlag = 0;
2154
2155         bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2156         DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2157
2158         spin_unlock_irq(cmd->device->host->host_lock);
2159
2160         return SUCCESS;
2161 }
2162
2163 /**
2164  * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2165  * scsi device that we need to deal with.
2166  *
2167  * @scsi_device: The new scsi device that we need to handle.
2168  */
2169 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2170 {
2171         struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2172         struct dc390_dcb *pDCB, *pDCB2 = NULL;
2173         uint id = scsi_device->id;
2174         uint lun = scsi_device->lun;
2175
2176         pDCB = kmalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2177         if (!pDCB)
2178                 return -ENOMEM;
2179         memset(pDCB, 0, sizeof(struct dc390_dcb));
2180
2181         if (!pACB->DCBCnt++) {
2182                 pACB->pLinkDCB = pDCB;
2183                 pACB->pDCBRunRobin = pDCB;
2184         } else {
2185                 pACB->pLastDCB->pNextDCB = pDCB;
2186         }
2187
2188         pDCB->pNextDCB = pACB->pLinkDCB;
2189         pACB->pLastDCB = pDCB;
2190
2191         pDCB->pDCBACB = pACB;
2192         pDCB->TargetID = id;
2193         pDCB->TargetLUN = lun;
2194
2195         /*
2196          * Some values are for all LUNs: Copy them
2197          * In a clean way: We would have an own structure for a SCSI-ID
2198          */
2199         if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2200                 pDCB->DevMode = pDCB2->DevMode;
2201                 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2202                 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2203                 pDCB->SyncOffset = pDCB2->SyncOffset;
2204                 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2205
2206                 pDCB->CtrlR3 = pDCB2->CtrlR3;
2207                 pDCB->CtrlR4 = pDCB2->CtrlR4;
2208         } else {
2209                 u8 index = pACB->AdapterIndex;
2210                 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2211
2212                 pDCB->DevMode = prom->EE_MODE1;
2213                 pDCB->NegoPeriod =
2214                         (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2215                 pDCB->CtrlR3 = FAST_CLK;
2216                 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2217                 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2218                         pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2219         }
2220
2221         if (pDCB->DevMode & SYNC_NEGO_)
2222                 pDCB->SyncMode |= SYNC_ENABLE;
2223         else {
2224                 pDCB->SyncMode = 0;
2225                 pDCB->SyncOffset &= ~0x0f;
2226         }
2227
2228         pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2229         if (pDCB->DevMode & PARITY_CHK_)
2230                 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2231
2232         pACB->scan_devices = 1;
2233         scsi_device->hostdata = pDCB;
2234         return 0;
2235 }
2236
2237 /**
2238  * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2239  * device that is going away.
2240  *
2241  * @scsi_device: The scsi device that we need to remove.
2242  */
2243 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2244 {
2245         struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2246         struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2247         struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2248
2249         pACB->scan_devices = 0;
2250
2251         BUG_ON(pDCB->GoingSRBCnt > 1);
2252
2253         if (pDCB == pACB->pLinkDCB) {
2254                 if (pACB->pLastDCB == pDCB) {
2255                         pDCB->pNextDCB = NULL;
2256                         pACB->pLastDCB = NULL;
2257                 }
2258                 pACB->pLinkDCB = pDCB->pNextDCB;
2259         } else {
2260                 while (pPrevDCB->pNextDCB != pDCB)
2261                         pPrevDCB = pPrevDCB->pNextDCB;
2262                 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2263                 if (pDCB == pACB->pLastDCB)
2264                         pACB->pLastDCB = pPrevDCB;
2265         }
2266
2267         if (pDCB == pACB->pActiveDCB)
2268                 pACB->pActiveDCB = NULL;
2269         if (pDCB == pACB->pLinkDCB)
2270                 pACB->pLinkDCB = pDCB->pNextDCB;
2271         if (pDCB == pACB->pDCBRunRobin)
2272                 pACB->pDCBRunRobin = pDCB->pNextDCB;
2273         kfree(pDCB);
2274
2275         pACB->DCBCnt--;
2276 }
2277
2278 static int dc390_slave_configure(struct scsi_device *sdev)
2279 {
2280         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2281         struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2282
2283         acb->scan_devices = 0;
2284         if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2285                 dcb->SyncMode |= EN_TAG_QUEUEING;
2286                 scsi_activate_tcq(sdev, acb->TagMaxNum);
2287         }
2288
2289         return 0;
2290 }
2291
2292 static struct scsi_host_template driver_template = {
2293         .module                 = THIS_MODULE,
2294         .proc_name              = "tmscsim",
2295         .name                   = DC390_BANNER " V" DC390_VERSION,
2296         .slave_alloc            = dc390_slave_alloc,
2297         .slave_configure        = dc390_slave_configure,
2298         .slave_destroy          = dc390_slave_destroy,
2299         .queuecommand           = DC390_queuecommand,
2300         .eh_abort_handler       = DC390_abort,
2301         .eh_bus_reset_handler   = DC390_bus_reset,
2302         .can_queue              = 1,
2303         .this_id                = 7,
2304         .sg_tablesize           = SG_ALL,
2305         .cmd_per_lun            = 1,
2306         .use_clustering         = ENABLE_CLUSTERING,
2307         .max_sectors            = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2308 };
2309
2310 /***********************************************************************
2311  * Functions for access to DC390 EEPROM
2312  * and some to emulate it
2313  *
2314  **********************************************************************/
2315
2316 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2317 {
2318         u8 carryFlag = 1, j = 0x80, bval;
2319         int i;
2320
2321         for (i = 0; i < 9; i++) {
2322                 if (carryFlag) {
2323                         pci_write_config_byte(pdev, 0x80, 0x40);
2324                         bval = 0xc0;
2325                 } else
2326                         bval = 0x80;
2327
2328                 udelay(160);
2329                 pci_write_config_byte(pdev, 0x80, bval);
2330                 udelay(160);
2331                 pci_write_config_byte(pdev, 0x80, 0);
2332                 udelay(160);
2333
2334                 carryFlag = (cmd & j) ? 1 : 0;
2335                 j >>= 1;
2336         }
2337 }
2338
2339 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2340 {
2341         int i;
2342         u16 wval = 0;
2343         u8 bval;
2344
2345         for (i = 0; i < 16; i++) {
2346                 wval <<= 1;
2347
2348                 pci_write_config_byte(pdev, 0x80, 0x80);
2349                 udelay(160);
2350                 pci_write_config_byte(pdev, 0x80, 0x40);
2351                 udelay(160);
2352                 pci_read_config_byte(pdev, 0x00, &bval);
2353
2354                 if (bval == 0x22)
2355                         wval |= 1;
2356         }
2357
2358         return wval;
2359 }
2360
2361 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2362 {
2363         u8 cmd = EEPROM_READ, i;
2364
2365         for (i = 0; i < 0x40; i++) {
2366                 pci_write_config_byte(pdev, 0xc0, 0);
2367                 udelay(160);
2368
2369                 dc390_eeprom_prepare_read(pdev, cmd++);
2370                 *ptr++ = dc390_eeprom_get_data(pdev);
2371
2372                 pci_write_config_byte(pdev, 0x80, 0);
2373                 pci_write_config_byte(pdev, 0x80, 0);
2374                 udelay(160);
2375         }
2376 }
2377
2378 /* Override EEprom values with explicitly set values */
2379 static void __devinit dc390_eeprom_override(u8 index)
2380 {
2381         u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2382
2383         /* Adapter Settings */
2384         if (tmscsim[0] != -2)
2385                 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2386         if (tmscsim[3] != -2)
2387                 ptr[EE_MODE2] = (u8)tmscsim[3];
2388         if (tmscsim[5] != -2)
2389                 ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2390         if (tmscsim[4] != -2)
2391                 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2392
2393         /* Device Settings */
2394         for (id = 0; id < MAX_SCSI_ID; id++) {
2395                 if (tmscsim[2] != -2)
2396                         ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2397                 if (tmscsim[1] != -2)
2398                         ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2399         }
2400 }
2401
2402 static int __devinitdata tmscsim_def[] = {
2403         7,
2404         0 /* 10MHz */,
2405         PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2406         MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2407         3 /* 16 Tags per LUN */,
2408         1 /* s delay after Reset */,
2409 };
2410
2411 /* Copy defaults over set values where missing */
2412 static void __devinit dc390_fill_with_defaults (void)
2413 {
2414         int i;
2415
2416         for (i = 0; i < 6; i++) {
2417                 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2418                         tmscsim[i] = tmscsim_def[i];
2419         }
2420
2421         /* Sanity checks */
2422         if (tmscsim[0] > 7)
2423                 tmscsim[0] = 7;
2424         if (tmscsim[1] > 7)
2425                 tmscsim[1] = 4;
2426         if (tmscsim[4] > 5)
2427                 tmscsim[4] = 4;
2428         if (tmscsim[5] > 180)
2429                 tmscsim[5] = 180;
2430 }
2431
2432 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2433 {
2434         u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2435         u8 EEbuf[128];
2436         u16 *ptr = (u16 *)EEbuf, wval = 0;
2437         int i;
2438
2439         dc390_read_eeprom(pdev, ptr);
2440         memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2441         memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2442                &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2443
2444         dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2445
2446         for (i = 0; i < 0x40; i++, ptr++)
2447                 wval += *ptr;
2448
2449         /* no Tekram EEprom found */
2450         if (wval != 0x1234) {
2451                 int speed;
2452
2453                 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2454
2455                 /*
2456                  * XXX(hch): bogus, because we might have tekram and
2457                  *           non-tekram hbas in a single machine.
2458                  */
2459                 dc390_fill_with_defaults();
2460
2461                 speed = dc390_clock_speed[tmscsim[1]];
2462                 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2463                        "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2464                        tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2465                        (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2466         }
2467 }
2468
2469 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2470 {
2471         struct Scsi_Host *shost = pACB->pScsiHost;
2472         u8 dstate;
2473
2474         /* Disable SCSI bus reset interrupt */
2475         DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2476
2477         if (pACB->Gmode2 & RST_SCSI_BUS) {
2478                 dc390_ResetSCSIBus(pACB);
2479                 udelay(1000);
2480                 shost->last_reset = jiffies + HZ/2 +
2481                         HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2482         }
2483
2484         pACB->ACBFlag = 0;
2485
2486         /* Reset Pending INT */
2487         DC390_read8(INT_Status);
2488
2489         /* 250ms selection timeout */
2490         DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2491
2492         /* Conversion factor = 0 , 40MHz clock */
2493         DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2494
2495         /* NOP cmd - clear command register */
2496         DC390_write8(ScsiCmd, NOP_CMD);
2497
2498         /* Enable Feature and SCSI-2 */
2499         DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2500
2501         /* Fast clock */
2502         DC390_write8(CtrlReg3, FAST_CLK);
2503
2504         /* Negation */
2505         DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2506                 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2507                  NEGATE_REQACKDATA : 0);
2508
2509         /* Clear Transfer Count High: ID */
2510         DC390_write8(CtcReg_High, 0);
2511         DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2512         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2513         DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2514
2515         dstate = DC390_read8(DMA_Status);
2516         DC390_write8(DMA_Status, dstate);
2517 }
2518
2519 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2520                                     const struct pci_device_id *id)
2521 {
2522         struct dc390_acb *pACB;
2523         struct Scsi_Host *shost;
2524         unsigned long io_port;
2525         int error = -ENODEV, i;
2526
2527         if (pci_enable_device(pdev))
2528                 goto out;
2529
2530         pci_set_master(pdev);
2531
2532         error = -ENOMEM;
2533         if (disable_clustering)
2534                 driver_template.use_clustering = DISABLE_CLUSTERING;
2535         shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2536         if (!shost)
2537                 goto out_disable_device;
2538
2539         pACB = (struct dc390_acb *)shost->hostdata;
2540         memset(pACB, 0, sizeof(struct dc390_acb));
2541
2542         dc390_check_eeprom(pdev, dc390_adapterCnt);
2543         dc390_eeprom_override(dc390_adapterCnt);
2544
2545         io_port = pci_resource_start(pdev, 0);
2546
2547         shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2548         shost->io_port = io_port;
2549         shost->n_io_port = 0x80;
2550         shost->irq = pdev->irq;
2551         shost->base = io_port;
2552         shost->unique_id = io_port;
2553         shost->last_reset = jiffies;
2554
2555         pACB->pScsiHost = shost;
2556         pACB->IOPortBase = (u16) io_port;
2557         pACB->IRQLevel = pdev->irq;
2558
2559         shost->max_id = 8;
2560
2561         if (shost->max_id - 1 ==
2562             dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2563                 shost->max_id--;
2564
2565         if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2566                 shost->max_lun = 8;
2567         else
2568                 shost->max_lun = 1;
2569
2570         pACB->pFreeSRB = pACB->SRB_array;
2571         pACB->SRBCount = MAX_SRB_CNT;
2572         pACB->AdapterIndex = dc390_adapterCnt;
2573         pACB->TagMaxNum =
2574                 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2575         pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2576
2577         for (i = 0; i < pACB->SRBCount-1; i++)
2578                 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2579         pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2580         pACB->pTmpSRB = &pACB->TmpSRB;
2581
2582         pACB->sel_timeout = SEL_TIMEOUT;
2583         pACB->glitch_cfg = EATER_25NS;
2584         pACB->pdev = pdev;
2585
2586         if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2587                 printk(KERN_ERR "DC390: register IO ports error!\n");
2588                 goto out_host_put;
2589         }
2590
2591         /* Reset Pending INT */
2592         DC390_read8_(INT_Status, io_port);
2593
2594         if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2595                                 "tmscsim", pACB)) {
2596                 printk(KERN_ERR "DC390: register IRQ error!\n");
2597                 goto out_release_region;
2598         }
2599
2600         dc390_init_hw(pACB, dc390_adapterCnt);
2601
2602         dc390_adapterCnt++;
2603
2604         pci_set_drvdata(pdev, shost);
2605
2606         error = scsi_add_host(shost, &pdev->dev);
2607         if (error)
2608                 goto out_free_irq;
2609         scsi_scan_host(shost);
2610         return 0;
2611
2612  out_free_irq:
2613         free_irq(pdev->irq, pACB);
2614  out_release_region:
2615         release_region(io_port, shost->n_io_port);
2616  out_host_put:
2617         scsi_host_put(shost);
2618  out_disable_device:
2619         pci_disable_device(pdev);
2620  out:
2621         return error;
2622 }
2623
2624 /**
2625  * dc390_remove_one - Called to remove a single instance of the adapter.
2626  *
2627  * @dev: The PCI device to remove.
2628  */
2629 static void __devexit dc390_remove_one(struct pci_dev *dev)
2630 {
2631         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2632         unsigned long iflags;
2633         struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2634         u8 bval;
2635
2636         scsi_remove_host(scsi_host);
2637
2638         spin_lock_irqsave(scsi_host->host_lock, iflags);
2639         pACB->ACBFlag = RESET_DEV;
2640         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2641         DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2642         if (pACB->Gmode2 & RST_SCSI_BUS)
2643                 dc390_ResetSCSIBus(pACB);
2644         spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2645
2646         free_irq(scsi_host->irq, pACB);
2647         release_region(scsi_host->io_port, scsi_host->n_io_port);
2648
2649         pci_disable_device(dev);
2650         scsi_host_put(scsi_host);
2651         pci_set_drvdata(dev, NULL);
2652 }
2653
2654 static struct pci_device_id tmscsim_pci_tbl[] = {
2655         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2656                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2657         { }
2658 };
2659 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2660
2661 static struct pci_driver dc390_driver = {
2662         .name           = "tmscsim",
2663         .id_table       = tmscsim_pci_tbl,
2664         .probe          = dc390_probe_one,
2665         .remove         = __devexit_p(dc390_remove_one),
2666 };
2667
2668 static int __init dc390_module_init(void)
2669 {
2670         if (!disable_clustering)
2671                 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
2672                        "\twith \"disable_clustering=1\" and report to maintainers\n");
2673
2674         if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2675                 tmscsim[0] = 7;
2676                 tmscsim[1] = 4;
2677                 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2678                 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2679                 tmscsim[4] = 2;
2680                 tmscsim[5] = 10;
2681                 printk (KERN_INFO "DC390: Using safe settings.\n");
2682         }
2683
2684         return pci_module_init(&dc390_driver);
2685 }
2686
2687 static void __exit dc390_module_exit(void)
2688 {
2689         pci_unregister_driver(&dc390_driver);
2690 }
2691
2692 module_init(dc390_module_init);
2693 module_exit(dc390_module_exit);
2694
2695 #ifndef MODULE
2696 static int __init dc390_setup (char *str)
2697 {
2698         int ints[8],i, im;
2699
2700         get_options(str, ARRAY_SIZE(ints), ints);
2701         im = ints[0];
2702
2703         if (im > 6) {
2704                 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2705                 im = 6;
2706         }
2707
2708         for (i = 0; i < im; i++)
2709                 tmscsim[i] = ints[i+1];
2710         /* dc390_checkparams (); */
2711         return 1;
2712 }
2713
2714 __setup("tmscsim=", dc390_setup);
2715 #endif