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Use access mode instead of open flags to determine needed permissions
[pv_ops_mirror.git] / drivers / scsi / tmscsim.c
blob44193049c4aed96de169fcea061f52536bf7e92f
1 /************************************************************************
2 * FILE NAME : TMSCSIM.C *
3 * BY : C.L. Huang, ching@tekram.com.tw *
4 * Description: Device Driver for Tekram DC-390(T) PCI SCSI *
5 * Bus Master Host Adapter *
6 * (C)Copyright 1995-1996 Tekram Technology Co., Ltd. *
7 ************************************************************************
8 * (C) Copyright: put under GNU GPL in 10/96 *
9 * (see Documentation/scsi/tmscsim.txt) *
10 ************************************************************************
11 * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $ *
12 * Enhancements and bugfixes by *
13 * Kurt Garloff <kurt@garloff.de> <garloff@suse.de> *
14 ************************************************************************
15 * HISTORY: *
16 * *
17 * REV# DATE NAME DESCRIPTION *
18 * 1.00 96/04/24 CLH First release *
19 * 1.01 96/06/12 CLH Fixed bug of Media Change for Removable *
20 * Device, scan all LUN. Support Pre2.0.10 *
21 * 1.02 96/06/18 CLH Fixed bug of Command timeout ... *
22 * 1.03 96/09/25 KG Added tmscsim_proc_info() *
23 * 1.04 96/10/11 CLH Updating for support KV 2.0.x *
24 * 1.05 96/10/18 KG Fixed bug in DC390_abort(null ptr deref)*
25 * 1.06 96/10/25 KG Fixed module support *
26 * 1.07 96/11/09 KG Fixed tmscsim_proc_info() *
27 * 1.08 96/11/18 KG Fixed null ptr in DC390_Disconnect() *
28 * 1.09 96/11/30 KG Added register the allocated IO space *
29 * 1.10 96/12/05 CLH Modified tmscsim_proc_info(), and reset *
30 * pending interrupt in DC390_detect() *
31 * 1.11 97/02/05 KG/CLH Fixeds problem with partitions greater *
32 * than 1GB *
33 * 1.12 98/02/15 MJ Rewritten PCI probing *
34 * 1.13 98/04/08 KG Support for non DC390, __initfunc decls,*
35 * changed max devs from 10 to 16 *
36 * 1.14a 98/05/05 KG Dynamic DCB allocation, add-single-dev *
37 * for LUNs if LUN_SCAN (BIOS) not set *
38 * runtime config using /proc interface *
39 * 1.14b 98/05/06 KG eliminated cli (); sti (); spinlocks *
40 * 1.14c 98/05/07 KG 2.0.x compatibility *
41 * 1.20a 98/05/07 KG changed names of funcs to be consistent *
42 * DC390_ (entry points), dc390_ (internal)*
43 * reworked locking *
44 * 1.20b 98/05/12 KG bugs: version, kfree, _ctmp *
45 * debug output *
46 * 1.20c 98/05/12 KG bugs: kfree, parsing, EEpromDefaults *
47 * 1.20d 98/05/14 KG bugs: list linkage, clear flag after *
48 * reset on startup, code cleanup *
49 * 1.20e 98/05/15 KG spinlock comments, name space cleanup *
50 * pLastDCB now part of ACB structure *
51 * added stats, timeout for 2.1, TagQ bug *
52 * RESET and INQUIRY interface commands *
53 * 1.20f 98/05/18 KG spinlocks fixes, max_lun fix, free DCBs *
54 * for missing LUNs, pending int *
55 * 1.20g 98/05/19 KG Clean up: Avoid short *
56 * 1.20h 98/05/21 KG Remove AdaptSCSIID, max_lun ... *
57 * 1.20i 98/05/21 KG Aiiie: Bug with TagQMask *
58 * 1.20j 98/05/24 KG Handle STAT_BUSY, handle pACB->pLinkDCB *
59 * == 0 in remove_dev and DoingSRB_Done *
60 * 1.20k 98/05/25 KG DMA_INT (experimental) *
61 * 1.20l 98/05/27 KG remove DMA_INT; DMA_IDLE cmds added; *
62 * 1.20m 98/06/10 KG glitch configurable; made some global *
63 * vars part of ACB; use DC390_readX *
64 * 1.20n 98/06/11 KG startup params *
65 * 1.20o 98/06/15 KG added TagMaxNum to boot/module params *
66 * Device Nr -> Idx, TagMaxNum power of 2 *
67 * 1.20p 98/06/17 KG Docu updates. Reset depends on settings *
68 * pci_set_master added; 2.0.xx: pcibios_* *
69 * used instead of MechNum things ... *
70 * 1.20q 98/06/23 KG Changed defaults. Added debug code for *
71 * removable media and fixed it. TagMaxNum *
72 * fixed for DC390. Locking: ACB, DRV for *
73 * better IRQ sharing. Spelling: Queueing *
74 * Parsing and glitch_cfg changes. Display *
75 * real SyncSpeed value. Made DisConn *
76 * functional (!) *
77 * 1.20r 98/06/30 KG Debug macros, allow disabling DsCn, set *
78 * BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module *
79 * param -1 fixed. *
80 * 1.20s 98/08/20 KG Debug info on abort(), try to check PCI,*
81 * phys_to_bus instead of phys_to_virt, *
82 * fixed sel. process, fixed locking, *
83 * added MODULE_XXX infos, changed IRQ *
84 * request flags, disable DMA_INT *
85 * 1.20t 98/09/07 KG TagQ report fixed; Write Erase DMA Stat;*
86 * initfunc -> __init; better abort; *
87 * Timeout for XFER_DONE & BLAST_COMPLETE; *
88 * Allow up to 33 commands being processed *
89 * 2.0a 98/10/14 KG Max Cmnds back to 17. DMA_Stat clearing *
90 * all flags. Clear within while() loops *
91 * in DataIn_0/Out_0. Null ptr in dumpinfo *
92 * for pSRB==0. Better locking during init.*
93 * bios_param() now respects part. table. *
94 * 2.0b 98/10/24 KG Docu fixes. Timeout Msg in DMA Blast. *
95 * Disallow illegal idx in INQUIRY/REMOVE *
96 * 2.0c 98/11/19 KG Cleaned up detect/init for SMP boxes, *
97 * Write Erase DMA (1.20t) caused problems *
98 * 2.0d 98/12/25 KG Christmas release ;-) Message handling *
99 * completely reworked. Handle target ini- *
100 * tiated SDTR correctly. *
101 * 2.0d1 99/01/25 KG Try to handle RESTORE_PTR *
102 * 2.0d2 99/02/08 KG Check for failure of kmalloc, correct *
103 * inclusion of scsicam.h, DelayReset *
104 * 2.0d3 99/05/31 KG DRIVER_OK -> DID_OK, DID_NO_CONNECT, *
105 * detect Target mode and warn. *
106 * pcmd->result handling cleaned up. *
107 * 2.0d4 99/06/01 KG Cleaned selection process. Found bug *
108 * which prevented more than 16 tags. Now: *
109 * 24. SDTR cleanup. Cleaner multi-LUN *
110 * handling. Don't modify ControlRegs/FIFO *
111 * when connected. *
112 * 2.0d5 99/06/01 KG Clear DevID, Fix INQUIRY after cfg chg. *
113 * 2.0d6 99/06/02 KG Added ADD special command to allow cfg. *
114 * before detection. Reset SYNC_NEGO_DONE *
115 * after a bus reset. *
116 * 2.0d7 99/06/03 KG Fixed bugs wrt add,remove commands *
117 * 2.0d8 99/06/04 KG Removed copying of cmnd into CmdBlock. *
118 * Fixed Oops in _release(). *
119 * 2.0d9 99/06/06 KG Also tag queue INQUIRY, T_U_R, ... *
120 * Allow arb. no. of Tagged Cmnds. Max 32 *
121 * 2.0d1099/06/20 KG TagMaxNo changes now honoured! Queueing *
122 * clearified (renamed ..) TagMask handling*
123 * cleaned. *
124 * 2.0d1199/06/28 KG cmd->result now identical to 2.0d2 *
125 * 2.0d1299/07/04 KG Changed order of processing in IRQ *
126 * 2.0d1399/07/05 KG Don't update DCB fields if removed *
127 * 2.0d1499/07/05 KG remove_dev: Move kfree() to the end *
128 * 2.0d1599/07/12 KG use_new_eh_code: 0, ULONG -> UINT where *
129 * appropriate *
130 * 2.0d1699/07/13 KG Reenable StartSCSI interrupt, Retry msg *
131 * 2.0d1799/07/15 KG Remove debug msg. Disable recfg. when *
132 * there are queued cmnds *
133 * 2.0d1899/07/18 KG Selection timeout: Don't requeue *
134 * 2.0d1999/07/18 KG Abort: Only call scsi_done if dequeued *
135 * 2.0d2099/07/19 KG Rst_Detect: DoingSRB_Done *
136 * 2.0d2199/08/15 KG dev_id for request/free_irq, cmnd[0] for*
137 * RETRY, SRBdone does DID_ABORT for the *
138 * cmd passed by DC390_reset() *
139 * 2.0d2299/08/25 KG dev_id fixed. can_queue: 42 *
140 * 2.0d2399/08/25 KG Removed some debugging code. dev_id *
141 * now is set to pACB. Use u8,u16,u32. *
142 * 2.0d2499/11/14 KG Unreg. I/O if failed IRQ alloc. Call *
143 * done () w/ DID_BAD_TARGET in case of *
144 * missing DCB. We are old EH!! *
145 * 2.0d2500/01/15 KG 2.3.3x compat from Andreas Schultz *
146 * set unique_id. Disable RETRY message. *
147 * 2.0d2600/01/29 KG Go to new EH. *
148 * 2.0d2700/01/31 KG ... but maintain 2.0 compat. *
149 * and fix DCB freeing *
150 * 2.0d2800/02/14 KG Queue statistics fixed, dump special cmd*
151 * Waiting_Timer for failed StartSCSI *
152 * New EH: Don't return cmnds to ML on RST *
153 * Use old EH (don't have new EH fns yet) *
154 * Reset: Unlock, but refuse to queue *
155 * 2.3 __setup function *
156 * 2.0e 00/05/22 KG Return residual for 2.3 *
157 * 2.0e1 00/05/25 KG Compile fixes for 2.3.99 *
158 * 2.0e2 00/05/27 KG Jeff Garzik's pci_enable_device() *
159 * 2.0e3 00/09/29 KG Some 2.4 changes. Don't try Sync Nego *
160 * before INQUIRY has reported ability. *
161 * Recognise INQUIRY as scanning command. *
162 * 2.0e4 00/10/13 KG Allow compilation into 2.4 kernel *
163 * 2.0e5 00/11/17 KG Store Inq.flags in DCB *
164 * 2.0e6 00/11/22 KG 2.4 init function (Thx to O.Schumann) *
165 * 2.4 PCI device table (Thx to A.Richter) *
166 * 2.0e7 00/11/28 KG Allow overriding of BIOS settings *
167 * 2.0f 00/12/20 KG Handle failed INQUIRYs during scan *
168 * 2.1a 03/11/29 GL, KG Initial fixing for 2.6. Convert to *
169 * use the current PCI-mapping API, update *
170 * command-queuing. *
171 * 2.1b 04/04/13 GL Fix for 64-bit platforms *
172 * 2.1b1 04/01/31 GL (applied 05.04) Remove internal *
173 * command-queuing. *
174 * 2.1b2 04/02/01 CH (applied 05.04) Fix error-handling *
175 * 2.1c 04/05/23 GL Update to use the new pci_driver API, *
176 * some scsi EH updates, more cleanup. *
177 * 2.1d 04/05/27 GL Moved setting of scan_devices to *
178 * slave_alloc/_configure/_destroy, as *
179 * suggested by CH. *
180 ***********************************************************************/
181
182 /* DEBUG options */
183 //#define DC390_DEBUG0
184 //#define DC390_DEBUG1
185 //#define DC390_DCBDEBUG
186 //#define DC390_PARSEDEBUG
187 //#define DC390_REMOVABLEDEBUG
188 //#define DC390_LOCKDEBUG
189
190 //#define NOP do{}while(0)
191 #define C_NOP
192
193 /* Debug definitions */
194 #ifdef DC390_DEBUG0
195 # define DEBUG0(x) x
196 #else
197 # define DEBUG0(x) C_NOP
198 #endif
199 #ifdef DC390_DEBUG1
200 # define DEBUG1(x) x
201 #else
202 # define DEBUG1(x) C_NOP
203 #endif
204 #ifdef DC390_DCBDEBUG
205 # define DCBDEBUG(x) x
206 #else
207 # define DCBDEBUG(x) C_NOP
208 #endif
209 #ifdef DC390_PARSEDEBUG
210 # define PARSEDEBUG(x) x
211 #else
212 # define PARSEDEBUG(x) C_NOP
213 #endif
214 #ifdef DC390_REMOVABLEDEBUG
215 # define REMOVABLEDEBUG(x) x
216 #else
217 # define REMOVABLEDEBUG(x) C_NOP
218 #endif
219 #define DCBDEBUG1(x) C_NOP
220
221 #include <linux/module.h>
222 #include <linux/delay.h>
223 #include <linux/signal.h>
224 #include <linux/errno.h>
225 #include <linux/kernel.h>
226 #include <linux/ioport.h>
227 #include <linux/pci.h>
228 #include <linux/proc_fs.h>
229 #include <linux/string.h>
230 #include <linux/mm.h>
231 #include <linux/blkdev.h>
232 #include <linux/timer.h>
233 #include <linux/interrupt.h>
234 #include <linux/init.h>
235 #include <linux/spinlock.h>
236 #include <asm/io.h>
237
238 #include <scsi/scsi.h>
239 #include <scsi/scsi_cmnd.h>
240 #include <scsi/scsi_device.h>
241 #include <scsi/scsi_host.h>
242 #include <scsi/scsicam.h>
243 #include <scsi/scsi_tcq.h>
244
245
246 #define DC390_BANNER "Tekram DC390/AM53C974"
247 #define DC390_VERSION "2.1d 2004-05-27"
248
249 #define PCI_DEVICE_ID_AMD53C974 PCI_DEVICE_ID_AMD_SCSI
250
251 #include "tmscsim.h"
252
253
254 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
255 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
256 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
257 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
258 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
259 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
260 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
261 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
262 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
263 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
264 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
265 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
266 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
267 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
268
269 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
270 static void dc390_Disconnect( struct dc390_acb* pACB );
271 static void dc390_Reselect( struct dc390_acb* pACB );
272 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
273 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
274 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
275 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
276 static void dc390_ResetDevParam(struct dc390_acb* pACB);
277
278 static u32 dc390_laststatus = 0;
279 static u8 dc390_adapterCnt = 0;
280
281 static int disable_clustering;
282 module_param(disable_clustering, int, S_IRUGO);
283 MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
284
285 /* Startup values, to be overriden on the commandline */
286 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
287
288 module_param_array(tmscsim, int, NULL, 0);
289 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
290 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
291 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
292 MODULE_LICENSE("GPL");
293 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
294
295 static void *dc390_phase0[]={
296 dc390_DataOut_0,
297 dc390_DataIn_0,
298 dc390_Command_0,
299 dc390_Status_0,
300 dc390_Nop_0,
301 dc390_Nop_0,
302 dc390_MsgOut_0,
303 dc390_MsgIn_0,
304 dc390_Nop_1
305 };
306
307 static void *dc390_phase1[]={
308 dc390_DataOutPhase,
309 dc390_DataInPhase,
310 dc390_CommandPhase,
311 dc390_StatusPhase,
312 dc390_Nop_0,
313 dc390_Nop_0,
314 dc390_MsgOutPhase,
315 dc390_MsgInPhase,
316 dc390_Nop_1
317 };
318
319 #ifdef DC390_DEBUG1
320 static char* dc390_p0_str[] = {
321 "dc390_DataOut_0",
322 "dc390_DataIn_0",
323 "dc390_Command_0",
324 "dc390_Status_0",
325 "dc390_Nop_0",
326 "dc390_Nop_0",
327 "dc390_MsgOut_0",
328 "dc390_MsgIn_0",
329 "dc390_Nop_1"
330 };
331
332 static char* dc390_p1_str[] = {
333 "dc390_DataOutPhase",
334 "dc390_DataInPhase",
335 "dc390_CommandPhase",
336 "dc390_StatusPhase",
337 "dc390_Nop_0",
338 "dc390_Nop_0",
339 "dc390_MsgOutPhase",
340 "dc390_MsgInPhase",
341 "dc390_Nop_1"
342 };
343 #endif
344
345 static u8 dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
346 static u8 dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
347 static u8 dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
348
349 /***********************************************************************
350 * Functions for the management of the internal structures
351 * (DCBs, SRBs, Queueing)
352 *
353 **********************************************************************/
354 static void inline dc390_start_segment(struct dc390_srb* pSRB)
355 {
356 struct scatterlist *psgl = pSRB->pSegmentList;
357
358 /* start new sg segment */
359 pSRB->SGBusAddr = sg_dma_address(psgl);
360 pSRB->SGToBeXferLen = sg_dma_len(psgl);
361 }
362
363 static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
364 {
365 unsigned long xfer = pSRB->SGToBeXferLen - residue;
366
367 /* xfer more bytes transferred */
368 pSRB->SGBusAddr += xfer;
369 pSRB->TotalXferredLen += xfer;
370 pSRB->SGToBeXferLen = residue;
371
372 return xfer;
373 }
374
375 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
376 {
377 struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
378 while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
379 {
380 pDCB = pDCB->pNextDCB;
381 if (pDCB == pACB->pLinkDCB)
382 return NULL;
383 }
384 DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
385 pDCB, pDCB->TargetID, pDCB->TargetLUN));
386 return pDCB;
387 }
388
389 /* Insert SRB oin top of free list */
390 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
391 {
392 DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
393 pSRB->pNextSRB = pACB->pFreeSRB;
394 pACB->pFreeSRB = pSRB;
395 }
396
397 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
398 {
399 pDCB->GoingSRBCnt++;
400 DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
401 /* Append to the list of Going commands */
402 if( pDCB->pGoingSRB )
403 pDCB->pGoingLast->pNextSRB = pSRB;
404 else
405 pDCB->pGoingSRB = pSRB;
406
407 pDCB->pGoingLast = pSRB;
408 /* No next one in sent list */
409 pSRB->pNextSRB = NULL;
410 }
411
412 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
413 {
414 DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
415 if (pSRB == pDCB->pGoingSRB)
416 pDCB->pGoingSRB = pSRB->pNextSRB;
417 else
418 {
419 struct dc390_srb* psrb = pDCB->pGoingSRB;
420 while (psrb && psrb->pNextSRB != pSRB)
421 psrb = psrb->pNextSRB;
422 if (!psrb)
423 { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
424 psrb->pNextSRB = pSRB->pNextSRB;
425 if (pSRB == pDCB->pGoingLast)
426 pDCB->pGoingLast = psrb;
427 }
428 pDCB->GoingSRBCnt--;
429 }
430
431 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
432 {
433 sg_init_one(sg, addr, length);
434 return sg;
435 }
436
437 /* Create pci mapping */
438 static int dc390_pci_map (struct dc390_srb* pSRB)
439 {
440 int error = 0;
441 struct scsi_cmnd *pcmd = pSRB->pcmd;
442 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
443 dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
444
445 /* Map sense buffer */
446 if (pSRB->SRBFlag & AUTO_REQSENSE) {
447 pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
448 pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1,
449 DMA_FROM_DEVICE);
450 cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList);
451
452 /* TODO: error handling */
453 if (pSRB->SGcount != 1)
454 error = 1;
455 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
456 /* Map SG list */
457 } else if (scsi_sg_count(pcmd)) {
458 int nseg;
459
460 nseg = scsi_dma_map(pcmd);
461
462 pSRB->pSegmentList = scsi_sglist(pcmd);
463 pSRB->SGcount = nseg;
464
465 /* TODO: error handling */
466 if (nseg < 0)
467 error = 1;
468 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
469 __FUNCTION__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
470 /* Map single segment */
471 } else
472 pSRB->SGcount = 0;
473
474 return error;
475 }
476
477 /* Remove pci mapping */
478 static void dc390_pci_unmap (struct dc390_srb* pSRB)
479 {
480 struct scsi_cmnd *pcmd = pSRB->pcmd;
481 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
482 DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
483
484 if (pSRB->SRBFlag) {
485 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
486 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
487 } else {
488 scsi_dma_unmap(pcmd);
489 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
490 __FUNCTION__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
491 }
492 }
493
494 static void __inline__
495 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
496 {
497 if (pSRB->TagNumber != SCSI_NO_TAG) {
498 pDCB->TagMask &= ~(1 << pSRB->TagNumber); /* free tag mask */
499 pSRB->TagNumber = SCSI_NO_TAG;
500 }
501 }
502
503
504 static int
505 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
506 {
507 struct scsi_cmnd *scmd = pSRB->pcmd;
508 struct scsi_device *sdev = scmd->device;
509 u8 cmd, disc_allowed, try_sync_nego;
510 char tag[2];
511
512 pSRB->ScsiPhase = SCSI_NOP0;
513
514 if (pACB->Connected)
515 {
516 // Should not happen normally
517 printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
518 pSRB->SRBState, pSRB->SRBFlag);
519 pSRB->SRBState = SRB_READY;
520 pACB->SelConn++;
521 return 1;
522 }
523 if (time_before (jiffies, pACB->pScsiHost->last_reset))
524 {
525 DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
526 return 1;
527 }
528 /* KG: Moved pci mapping here */
529 dc390_pci_map(pSRB);
530 /* TODO: error handling */
531 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
532 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
533 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
534 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
535 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
536 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
537 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); /* Flush FIFO */
538 DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
539 scmd->cmnd[0], pDCB->SyncMode));
540
541 /* Don't disconnect on AUTO_REQSENSE, cause it might be an
542 * Contingent Allegiance Condition (6.6), where no tags should be used.
543 * All other have to be allowed to disconnect to prevent Incorrect
544 * Initiator Connection (6.8.2/6.5.2) */
545 /* Changed KG, 99/06/06 */
546 if (! (pSRB->SRBFlag & AUTO_REQSENSE))
547 disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
548 else
549 disc_allowed = 0;
550
551 if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
552 (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
553 !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
554 try_sync_nego = 1;
555 else
556 try_sync_nego = 0;
557
558 pSRB->MsgCnt = 0;
559 cmd = SEL_W_ATN;
560 DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
561 /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
562 if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
563 DC390_write8(ScsiFifo, tag[0]);
564 pDCB->TagMask |= 1 << tag[1];
565 pSRB->TagNumber = tag[1];
566 DC390_write8(ScsiFifo, tag[1]);
567 DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->serial_number, pSRB, tag[1]));
568 cmd = SEL_W_ATN3;
569 } else {
570 /* No TagQ */
571 //no_tag:
572 DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->serial_number, pSRB));
573 }
574
575 pSRB->SRBState = SRB_START_;
576
577 if (try_sync_nego)
578 {
579 u8 Sync_Off = pDCB->SyncOffset;
580 DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
581 pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
582 pSRB->MsgOutBuf[1] = 3;
583 pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
584 pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
585 if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
586 pSRB->MsgOutBuf[4] = Sync_Off;
587 pSRB->MsgCnt = 5;
588 //pSRB->SRBState = SRB_MSGOUT_;
589 pSRB->SRBState |= DO_SYNC_NEGO;
590 cmd = SEL_W_ATN_STOP;
591 }
592
593 /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
594 if (cmd != SEL_W_ATN_STOP)
595 {
596 if( pSRB->SRBFlag & AUTO_REQSENSE )
597 {
598 DC390_write8 (ScsiFifo, REQUEST_SENSE);
599 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
600 DC390_write8 (ScsiFifo, 0);
601 DC390_write8 (ScsiFifo, 0);
602 DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
603 DC390_write8 (ScsiFifo, 0);
604 DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
605 }
606 else /* write cmnd to bus */
607 {
608 u8 *ptr; u8 i;
609 ptr = (u8 *)scmd->cmnd;
610 for (i = 0; i < scmd->cmd_len; i++)
611 DC390_write8 (ScsiFifo, *(ptr++));
612 }
613 }
614 DEBUG0(if (pACB->pActiveDCB) \
615 printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
616 DEBUG0(if (pDCB->pActiveSRB) \
617 printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
618 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
619 if (DC390_read8 (Scsi_Status) & INTERRUPT)
620 {
621 dc390_freetag (pDCB, pSRB);
622 DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
623 scmd->serial_number, scmd->device->id, scmd->device->lun));
624 pSRB->SRBState = SRB_READY;
625 //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
626 pACB->SelLost++;
627 return 1;
628 }
629 DC390_write8 (ScsiCmd, cmd);
630 pACB->pActiveDCB = pDCB;
631 pDCB->pActiveSRB = pSRB;
632 pACB->Connected = 1;
633 pSRB->ScsiPhase = SCSI_NOP1;
634 return 0;
635 }
636
637
638 static void __inline__
639 dc390_InvalidCmd(struct dc390_acb* pACB)
640 {
641 if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
642 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
643 }
644
645
646 static irqreturn_t __inline__
647 DC390_Interrupt(void *dev_id)
648 {
649 struct dc390_acb *pACB = dev_id;
650 struct dc390_dcb *pDCB;
651 struct dc390_srb *pSRB;
652 u8 sstatus=0;
653 u8 phase;
654 void (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
655 u8 istate, istatus;
656
657 sstatus = DC390_read8 (Scsi_Status);
658 if( !(sstatus & INTERRUPT) )
659 return IRQ_NONE;
660
661 DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
662
663 //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
664 //dstatus = DC390_read8 (DMA_Status);
665 //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
666
667 spin_lock_irq(pACB->pScsiHost->host_lock);
668
669 istate = DC390_read8 (Intern_State);
670 istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
671
672 DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
673 dc390_laststatus &= ~0x00ffffff;
674 dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
675
676 if (sstatus & ILLEGAL_OP_ERR)
677 {
678 printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
679 dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
680 }
681
682 else if (istatus & INVALID_CMD)
683 {
684 printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
685 dc390_InvalidCmd( pACB );
686 goto unlock;
687 }
688
689 if (istatus & SCSI_RESET)
690 {
691 dc390_ScsiRstDetect( pACB );
692 goto unlock;
693 }
694
695 if (istatus & DISCONNECTED)
696 {
697 dc390_Disconnect( pACB );
698 goto unlock;
699 }
700
701 if (istatus & RESELECTED)
702 {
703 dc390_Reselect( pACB );
704 goto unlock;
705 }
706
707 else if (istatus & (SELECTED | SEL_ATTENTION))
708 {
709 printk (KERN_ERR "DC390: Target mode not supported!\n");
710 goto unlock;
711 }
712
713 if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
714 {
715 pDCB = pACB->pActiveDCB;
716 if (!pDCB)
717 {
718 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
719 goto unlock;
720 }
721 pSRB = pDCB->pActiveSRB;
722 if( pDCB->DCBFlag & ABORT_DEV_ )
723 dc390_EnableMsgOut_Abort (pACB, pSRB);
724
725 phase = pSRB->ScsiPhase;
726 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
727 stateV = (void *) dc390_phase0[phase];
728 ( *stateV )( pACB, pSRB, &sstatus );
729
730 pSRB->ScsiPhase = sstatus & 7;
731 phase = (u8) sstatus & 7;
732 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
733 stateV = (void *) dc390_phase1[phase];
734 ( *stateV )( pACB, pSRB, &sstatus );
735 }
736
737 unlock:
738 spin_unlock_irq(pACB->pScsiHost->host_lock);
739 return IRQ_HANDLED;
740 }
741
742 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
743 {
744 irqreturn_t ret;
745 DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
746 /* Locking is done in DC390_Interrupt */
747 ret = DC390_Interrupt(dev_id);
748 DEBUG1(printk (".. IRQ returned\n"));
749 return ret;
750 }
751
752 static void
753 dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
754 {
755 u8 sstatus;
756 u32 ResidCnt;
757 u8 dstate = 0;
758
759 sstatus = *psstatus;
760
761 if( !(pSRB->SRBState & SRB_XFERPAD) )
762 {
763 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
764 pSRB->SRBStatus |= PARITY_ERROR;
765
766 if( sstatus & COUNT_2_ZERO )
767 {
768 unsigned long timeout = jiffies + HZ;
769
770 /* Function called from the ISR with the host_lock held and interrupts disabled */
771 if (pSRB->SGToBeXferLen)
772 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
773 spin_unlock_irq(pACB->pScsiHost->host_lock);
774 udelay(50);
775 spin_lock_irq(pACB->pScsiHost->host_lock);
776 }
777 if (!time_before(jiffies, timeout))
778 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
779 DC390_read32 (DMA_Wk_ByteCntr));
780 dc390_laststatus &= ~0xff000000;
781 dc390_laststatus |= dstate << 24;
782 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
783 pSRB->SGIndex++;
784 if( pSRB->SGIndex < pSRB->SGcount )
785 {
786 pSRB->pSegmentList++;
787
788 dc390_start_segment(pSRB);
789 }
790 else
791 pSRB->SGToBeXferLen = 0;
792 }
793 else
794 {
795 ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
796 (((u32) DC390_read8 (CtcReg_High) << 16) |
797 ((u32) DC390_read8 (CtcReg_Mid) << 8) |
798 (u32) DC390_read8 (CtcReg_Low));
799
800 dc390_advance_segment(pSRB, ResidCnt);
801 }
802 }
803 if ((*psstatus & 7) != SCSI_DATA_OUT)
804 {
805 DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
806 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
807 }
808 }
809
810 static void
811 dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
812 {
813 u8 sstatus, residual, bval;
814 u32 ResidCnt, i;
815 unsigned long xferCnt;
816
817 sstatus = *psstatus;
818
819 if( !(pSRB->SRBState & SRB_XFERPAD) )
820 {
821 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
822 pSRB->SRBStatus |= PARITY_ERROR;
823
824 if( sstatus & COUNT_2_ZERO )
825 {
826 int dstate = 0;
827 unsigned long timeout = jiffies + HZ;
828
829 /* Function called from the ISR with the host_lock held and interrupts disabled */
830 if (pSRB->SGToBeXferLen)
831 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
832 spin_unlock_irq(pACB->pScsiHost->host_lock);
833 udelay(50);
834 spin_lock_irq(pACB->pScsiHost->host_lock);
835 }
836 if (!time_before(jiffies, timeout)) {
837 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
838 DC390_read32 (DMA_Wk_ByteCntr));
839 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
840 }
841 dc390_laststatus &= ~0xff000000;
842 dc390_laststatus |= dstate << 24;
843 DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
844 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8) \
845 + ((unsigned long) DC390_read8 (CtcReg_Low)));
846 DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
847
848 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
849
850 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
851 pSRB->SGIndex++;
852 if( pSRB->SGIndex < pSRB->SGcount )
853 {
854 pSRB->pSegmentList++;
855
856 dc390_start_segment(pSRB);
857 }
858 else
859 pSRB->SGToBeXferLen = 0;
860 }
861 else /* phase changed */
862 {
863 residual = 0;
864 bval = DC390_read8 (Current_Fifo);
865 while( bval & 0x1f )
866 {
867 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
868 if( (bval & 0x1f) == 1 )
869 {
870 for(i=0; i < 0x100; i++)
871 {
872 bval = DC390_read8 (Current_Fifo);
873 if( !(bval & 0x1f) )
874 goto din_1;
875 else if( i == 0x0ff )
876 {
877 residual = 1; /* ;1 residual byte */
878 goto din_1;
879 }
880 }
881 }
882 else
883 bval = DC390_read8 (Current_Fifo);
884 }
885 din_1:
886 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
887 for (i = 0xa000; i; i--)
888 {
889 bval = DC390_read8 (DMA_Status);
890 if (bval & BLAST_COMPLETE)
891 break;
892 }
893 /* It seems a DMA Blast abort isn't that bad ... */
894 if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
895 //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
896 dc390_laststatus &= ~0xff000000;
897 dc390_laststatus |= bval << 24;
898
899 DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
900 ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
901 ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
902 (u32) DC390_read8 (CtcReg_Low);
903
904 xferCnt = dc390_advance_segment(pSRB, ResidCnt);
905
906 if (residual) {
907 size_t count = 1;
908 size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
909 unsigned long flags;
910 u8 *ptr;
911
912 bval = DC390_read8 (ScsiFifo); /* get one residual byte */
913
914 local_irq_save(flags);
915 ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
916 if (likely(ptr)) {
917 *(ptr + offset) = bval;
918 scsi_kunmap_atomic_sg(ptr);
919 }
920 local_irq_restore(flags);
921 WARN_ON(!ptr);
922
923 /* 1 more byte read */
924 xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
925 }
926 DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
927 pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
928 }
929 }
930 if ((*psstatus & 7) != SCSI_DATA_IN)
931 {
932 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
933 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
934 }
935 }
936
937 static void
938 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
939 {
940 }
941
942 static void
943 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
944 {
945
946 pSRB->TargetStatus = DC390_read8 (ScsiFifo);
947 //udelay (1);
948 pSRB->EndMessage = DC390_read8 (ScsiFifo); /* get message */
949
950 *psstatus = SCSI_NOP0;
951 pSRB->SRBState = SRB_COMPLETED;
952 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
953 }
954
955 static void
956 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
957 {
958 if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
959 *psstatus = SCSI_NOP0;
960 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
961 }
962
963
964 static void __inline__
965 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
966 {
967 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
968 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
969 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
970 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
971 dc390_SetXferRate (pACB, pDCB);
972 }
973
974
975 #ifdef DC390_DEBUG0
976 static void
977 dc390_printMsg (u8 *MsgBuf, u8 len)
978 {
979 int i;
980 printk (" %02x", MsgBuf[0]);
981 for (i = 1; i < len; i++)
982 printk (" %02x", MsgBuf[i]);
983 printk ("\n");
984 }
985 #endif
986
987 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
988
989 /* reject_msg */
990 static void __inline__
991 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
992 {
993 pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
994 pSRB->MsgCnt = 1;
995 DC390_ENABLE_MSGOUT;
996 DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
997 }
998
999 /* abort command */
1000 static void
1001 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1002 {
1003 pSRB->MsgOutBuf[0] = ABORT;
1004 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1005 pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1006 }
1007
1008 static struct dc390_srb*
1009 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1010 {
1011 struct dc390_srb* pSRB = pDCB->pGoingSRB;
1012
1013 if (pSRB)
1014 {
1015 struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1016 pSRB = (struct dc390_srb *)scmd->host_scribble;
1017
1018 if (pDCB->DCBFlag & ABORT_DEV_)
1019 {
1020 pSRB->SRBState = SRB_ABORT_SENT;
1021 dc390_EnableMsgOut_Abort( pACB, pSRB );
1022 }
1023
1024 if (!(pSRB->SRBState & SRB_DISCONNECT))
1025 goto mingx0;
1026
1027 pDCB->pActiveSRB = pSRB;
1028 pSRB->SRBState = SRB_DATA_XFER;
1029 }
1030 else
1031 {
1032 mingx0:
1033 pSRB = pACB->pTmpSRB;
1034 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1035 pDCB->pActiveSRB = pSRB;
1036 pSRB->MsgOutBuf[0] = ABORT_TAG;
1037 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1038 }
1039 return pSRB;
1040 }
1041
1042
1043 /* set async transfer mode */
1044 static void
1045 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1046 {
1047 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1048 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1049 printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1050 pSRB->SRBState &= ~DO_SYNC_NEGO;
1051 pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1052 pDCB->SyncPeriod = 0;
1053 pDCB->SyncOffset = 0;
1054 //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1055 pDCB->CtrlR3 = FAST_CLK; /* fast clock / normal scsi */
1056 pDCB->CtrlR4 &= 0x3f;
1057 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1058 dc390_reprog (pACB, pDCB);
1059 }
1060
1061 /* set sync transfer mode */
1062 static void
1063 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1064 {
1065 u8 bval;
1066 u16 wval, wval1;
1067 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1068 u8 oldsyncperiod = pDCB->SyncPeriod;
1069 u8 oldsyncoffset = pDCB->SyncOffset;
1070
1071 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1072 {
1073 printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1074 pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1075
1076 /* reject */
1077 //dc390_MsgIn_reject (pACB, pSRB);
1078 //return dc390_MsgIn_set_async (pACB, pSRB);
1079
1080 /* Reply with corrected SDTR Message */
1081 if (pSRB->MsgInBuf[4] > 15)
1082 {
1083 printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1084 pSRB->MsgInBuf[4] = 15;
1085 }
1086 if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1087 {
1088 printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1089 pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1090 }
1091 memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1092 pSRB->MsgCnt = 5;
1093 DC390_ENABLE_MSGOUT;
1094 }
1095
1096 pSRB->SRBState &= ~DO_SYNC_NEGO;
1097 pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1098 pDCB->SyncOffset &= 0x0f0;
1099 pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1100 pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1101
1102 wval = (u16) pSRB->MsgInBuf[3];
1103 wval = wval << 2; wval -= 3; wval1 = wval / 25; /* compute speed */
1104 if( (wval1 * 25) != wval) wval1++;
1105 bval = FAST_CLK+FAST_SCSI; /* fast clock / fast scsi */
1106
1107 pDCB->CtrlR4 &= 0x3f; /* Glitch eater: 12ns less than normal */
1108 if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1109 pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1110 else
1111 pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1112 if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1113
1114 if (wval1 >= 8)
1115 {
1116 wval1--; /* Timing computation differs by 1 from FAST_SCSI */
1117 bval = FAST_CLK; /* fast clock / normal scsi */
1118 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1119 }
1120
1121 pDCB->CtrlR3 = bval;
1122 pDCB->SyncPeriod = (u8)wval1;
1123
1124 if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1125 {
1126 if (! (bval & FAST_SCSI)) wval1++;
1127 printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1128 40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1129 }
1130
1131 dc390_reprog (pACB, pDCB);
1132 }
1133
1134
1135 /* handle RESTORE_PTR */
1136 /* This doesn't look very healthy... to-be-fixed */
1137 static void
1138 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1139 {
1140 struct scsi_cmnd *pcmd = pSRB->pcmd;
1141 struct scatterlist *psgl;
1142 pSRB->TotalXferredLen = 0;
1143 pSRB->SGIndex = 0;
1144 if (scsi_sg_count(pcmd)) {
1145 size_t saved;
1146 pSRB->pSegmentList = scsi_sglist(pcmd);
1147 psgl = pSRB->pSegmentList;
1148 //dc390_pci_sync(pSRB);
1149
1150 while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1151 {
1152 pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1153 pSRB->SGIndex++;
1154 if( pSRB->SGIndex < pSRB->SGcount )
1155 {
1156 pSRB->pSegmentList++;
1157
1158 dc390_start_segment(pSRB);
1159 }
1160 else
1161 pSRB->SGToBeXferLen = 0;
1162 }
1163
1164 saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1165 pSRB->SGToBeXferLen -= saved;
1166 pSRB->SGBusAddr += saved;
1167 printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1168 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1169
1170 } else {
1171 pSRB->SGcount = 0;
1172 printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1173 }
1174
1175 pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1176 }
1177
1178
1179 /* According to the docs, the AM53C974 reads the message and
1180 * generates a Successful Operation IRQ before asserting ACK for
1181 * the last byte (how does it know whether it's the last ?) */
1182 /* The old code handled it in another way, indicating, that on
1183 * every message byte an IRQ is generated and every byte has to
1184 * be manually ACKed. Hmmm ? (KG, 98/11/28) */
1185 /* The old implementation was correct. Sigh! */
1186
1187 /* Check if the message is complete */
1188 static u8 __inline__
1189 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1190 {
1191 if (*msgbuf == EXTENDED_MESSAGE)
1192 {
1193 if (len < 2) return 0;
1194 if (len < msgbuf[1] + 2) return 0;
1195 }
1196 else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1197 if (len < 2) return 0;
1198 return 1;
1199 }
1200
1201
1202
1203 /* read and eval received messages */
1204 static void
1205 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1206 {
1207 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1208
1209 /* Read the msg */
1210
1211 pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1212 //pSRB->SRBState = 0;
1213
1214 /* Msg complete ? */
1215 if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1216 {
1217 DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1218 /* Now eval the msg */
1219 switch (pSRB->MsgInBuf[0])
1220 {
1221 case DISCONNECT:
1222 pSRB->SRBState = SRB_DISCONNECT; break;
1223
1224 case SIMPLE_QUEUE_TAG:
1225 case HEAD_OF_QUEUE_TAG:
1226 case ORDERED_QUEUE_TAG:
1227 pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1228 break;
1229
1230 case MESSAGE_REJECT:
1231 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1232 pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1233 if( pSRB->SRBState & DO_SYNC_NEGO)
1234 dc390_MsgIn_set_async (pACB, pSRB);
1235 break;
1236
1237 case EXTENDED_MESSAGE:
1238 /* reject every extended msg but SDTR */
1239 if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1240 dc390_MsgIn_reject (pACB, pSRB);
1241 else
1242 {
1243 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1244 dc390_MsgIn_set_async (pACB, pSRB);
1245 else
1246 dc390_MsgIn_set_sync (pACB, pSRB);
1247 }
1248
1249 // nothing has to be done
1250 case COMMAND_COMPLETE: break;
1251
1252 // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1253 // scsi command. Thanks, Gerard, for pointing it out.
1254 case SAVE_POINTERS:
1255 pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1256 break;
1257 // The device might want to restart transfer with a RESTORE
1258 case RESTORE_POINTERS:
1259 DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1260 dc390_restore_ptr (pACB, pSRB);
1261 break;
1262
1263 // reject unknown messages
1264 default: dc390_MsgIn_reject (pACB, pSRB);
1265 }
1266
1267 /* Clear counter and MsgIn state */
1268 pSRB->SRBState &= ~SRB_MSGIN;
1269 pACB->MsgLen = 0;
1270 }
1271
1272 *psstatus = SCSI_NOP0;
1273 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1274 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1275 }
1276
1277
1278 static void
1279 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1280 {
1281 unsigned long lval;
1282 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1283
1284 if (pSRB == pACB->pTmpSRB)
1285 {
1286 if (pDCB)
1287 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1288 else
1289 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1290
1291 /* Try to recover - some broken disks react badly to tagged INQUIRY */
1292 if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1293 pSRB = pDCB->pGoingSRB;
1294 pDCB->pActiveSRB = pSRB;
1295 } else {
1296 pSRB->pSRBDCB = pDCB;
1297 dc390_EnableMsgOut_Abort(pACB, pSRB);
1298 if (pDCB)
1299 pDCB->DCBFlag |= ABORT_DEV;
1300 return;
1301 }
1302 }
1303
1304 if( pSRB->SGIndex < pSRB->SGcount )
1305 {
1306 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1307 if( !pSRB->SGToBeXferLen )
1308 {
1309 dc390_start_segment(pSRB);
1310
1311 DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1312 }
1313 lval = pSRB->SGToBeXferLen;
1314 DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1315 DC390_write8 (CtcReg_Low, (u8) lval);
1316 lval >>= 8;
1317 DC390_write8 (CtcReg_Mid, (u8) lval);
1318 lval >>= 8;
1319 DC390_write8 (CtcReg_High, (u8) lval);
1320
1321 DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1322 DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1323
1324 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1325 pSRB->SRBState = SRB_DATA_XFER;
1326
1327 DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1328
1329 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1330 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1331 //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1332 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1333 }
1334 else /* xfer pad */
1335 {
1336 if( pSRB->SGcount )
1337 {
1338 pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1339 pSRB->SRBStatus |= OVER_RUN;
1340 DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1341 }
1342 DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1343 DC390_write8 (CtcReg_Low, 0);
1344 DC390_write8 (CtcReg_Mid, 0);
1345 DC390_write8 (CtcReg_High, 0);
1346
1347 pSRB->SRBState |= SRB_XFERPAD;
1348 DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1349 /*
1350 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1351 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1352 */
1353 }
1354 }
1355
1356
1357 static void
1358 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1359 {
1360 dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1361 }
1362
1363 static void
1364 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1365 {
1366 dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1367 }
1368
1369 static void
1370 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1371 {
1372 struct dc390_dcb* pDCB;
1373 u8 i, cnt;
1374 u8 *ptr;
1375
1376 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1377 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1378 if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1379 {
1380 cnt = (u8) pSRB->pcmd->cmd_len;
1381 ptr = (u8 *) pSRB->pcmd->cmnd;
1382 for(i=0; i < cnt; i++)
1383 DC390_write8 (ScsiFifo, *(ptr++));
1384 }
1385 else
1386 {
1387 DC390_write8 (ScsiFifo, REQUEST_SENSE);
1388 pDCB = pACB->pActiveDCB;
1389 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1390 DC390_write8 (ScsiFifo, 0);
1391 DC390_write8 (ScsiFifo, 0);
1392 DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1393 DC390_write8 (ScsiFifo, 0);
1394 DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1395 }
1396 pSRB->SRBState = SRB_COMMAND;
1397 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1398 }
1399
1400 static void
1401 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1402 {
1403 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1404 pSRB->SRBState = SRB_STATUS;
1405 DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1406 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1407 }
1408
1409 static void
1410 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1411 {
1412 u8 bval, i, cnt;
1413 u8 *ptr;
1414 struct dc390_dcb* pDCB;
1415
1416 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1417 pDCB = pACB->pActiveDCB;
1418 if( !(pSRB->SRBState & SRB_MSGOUT) )
1419 {
1420 cnt = pSRB->MsgCnt;
1421 if( cnt )
1422 {
1423 ptr = (u8 *) pSRB->MsgOutBuf;
1424 for(i=0; i < cnt; i++)
1425 DC390_write8 (ScsiFifo, *(ptr++));
1426 pSRB->MsgCnt = 0;
1427 if( (pDCB->DCBFlag & ABORT_DEV_) &&
1428 (pSRB->MsgOutBuf[0] == ABORT) )
1429 pSRB->SRBState = SRB_ABORT_SENT;
1430 }
1431 else
1432 {
1433 bval = ABORT; /* ??? MSG_NOP */
1434 if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1435 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1436 (pSRB->SRBFlag & AUTO_REQSENSE) )
1437 {
1438 if( pDCB->SyncMode & SYNC_ENABLE )
1439 goto mop1;
1440 }
1441 DC390_write8 (ScsiFifo, bval);
1442 }
1443 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1444 }
1445 else
1446 {
1447 mop1:
1448 printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1449 DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1450 DC390_write8 (ScsiFifo, 3); /* ;length of extended msg */
1451 DC390_write8 (ScsiFifo, EXTENDED_SDTR); /* ; sync nego */
1452 DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1453 if (pDCB->SyncOffset & 0x0f)
1454 DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1455 else
1456 DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1457 pSRB->SRBState |= DO_SYNC_NEGO;
1458 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1459 }
1460 }
1461
1462 static void
1463 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1464 {
1465 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1466 if( !(pSRB->SRBState & SRB_MSGIN) )
1467 {
1468 pSRB->SRBState &= ~SRB_DISCONNECT;
1469 pSRB->SRBState |= SRB_MSGIN;
1470 }
1471 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1472 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1473 }
1474
1475 static void
1476 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1477 {
1478 }
1479
1480 static void
1481 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1482 {
1483 }
1484
1485
1486 static void
1487 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1488 {
1489 u8 bval, i, cnt;
1490 struct dc390_dcb* ptr;
1491
1492 if( !(pDCB->TargetLUN) )
1493 {
1494 if( !pACB->scan_devices )
1495 {
1496 ptr = pACB->pLinkDCB;
1497 cnt = pACB->DCBCnt;
1498 bval = pDCB->TargetID;
1499 for(i=0; i<cnt; i++)
1500 {
1501 if( ptr->TargetID == bval )
1502 {
1503 ptr->SyncPeriod = pDCB->SyncPeriod;
1504 ptr->SyncOffset = pDCB->SyncOffset;
1505 ptr->CtrlR3 = pDCB->CtrlR3;
1506 ptr->CtrlR4 = pDCB->CtrlR4;
1507 ptr->SyncMode = pDCB->SyncMode;
1508 }
1509 ptr = ptr->pNextDCB;
1510 }
1511 }
1512 }
1513 return;
1514 }
1515
1516
1517 static void
1518 dc390_Disconnect( struct dc390_acb* pACB )
1519 {
1520 struct dc390_dcb *pDCB;
1521 struct dc390_srb *pSRB, *psrb;
1522 u8 i, cnt;
1523
1524 DEBUG0(printk(KERN_INFO "DISC,"));
1525
1526 if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1527 pACB->Connected = 0;
1528 pDCB = pACB->pActiveDCB;
1529 if (!pDCB)
1530 {
1531 DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1532 pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1533 mdelay(400);
1534 DC390_read8 (INT_Status); /* Reset Pending INT */
1535 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1536 return;
1537 }
1538 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1539 pSRB = pDCB->pActiveSRB;
1540 pACB->pActiveDCB = NULL;
1541 pSRB->ScsiPhase = SCSI_NOP0;
1542 if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1543 pSRB->SRBState = 0;
1544 else if( pSRB->SRBState & SRB_ABORT_SENT )
1545 {
1546 pDCB->TagMask = 0;
1547 pDCB->DCBFlag = 0;
1548 cnt = pDCB->GoingSRBCnt;
1549 pDCB->GoingSRBCnt = 0;
1550 pSRB = pDCB->pGoingSRB;
1551 for( i=0; i < cnt; i++)
1552 {
1553 psrb = pSRB->pNextSRB;
1554 dc390_Free_insert (pACB, pSRB);
1555 pSRB = psrb;
1556 }
1557 pDCB->pGoingSRB = NULL;
1558 }
1559 else
1560 {
1561 if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1562 !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1563 { /* Selection time out */
1564 pSRB->AdaptStatus = H_SEL_TIMEOUT;
1565 pSRB->TargetStatus = 0;
1566 goto disc1;
1567 }
1568 else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1569 {
1570 disc1:
1571 dc390_freetag (pDCB, pSRB);
1572 pDCB->pActiveSRB = NULL;
1573 pSRB->SRBState = SRB_FREE;
1574 dc390_SRBdone( pACB, pDCB, pSRB);
1575 }
1576 }
1577 pACB->MsgLen = 0;
1578 }
1579
1580
1581 static void
1582 dc390_Reselect( struct dc390_acb* pACB )
1583 {
1584 struct dc390_dcb* pDCB;
1585 struct dc390_srb* pSRB;
1586 u8 id, lun;
1587
1588 DEBUG0(printk(KERN_INFO "RSEL,"));
1589 pACB->Connected = 1;
1590 pDCB = pACB->pActiveDCB;
1591 if( pDCB )
1592 { /* Arbitration lost but Reselection won */
1593 DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1594 pSRB = pDCB->pActiveSRB;
1595 if( !( pACB->scan_devices ) )
1596 {
1597 struct scsi_cmnd *pcmd = pSRB->pcmd;
1598 scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1599 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1600 dc390_Going_remove(pDCB, pSRB);
1601 dc390_Free_insert(pACB, pSRB);
1602 pcmd->scsi_done (pcmd);
1603 DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1604 }
1605 }
1606 /* Get ID */
1607 lun = DC390_read8 (ScsiFifo);
1608 DEBUG0(printk ("Dev %02x,", lun));
1609 if (!(lun & (1 << pACB->pScsiHost->this_id)))
1610 printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1611 else
1612 lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1613 id = 0; while (lun >>= 1) id++;
1614 /* Get LUN */
1615 lun = DC390_read8 (ScsiFifo);
1616 if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1617 lun &= 7;
1618 DEBUG0(printk ("(%02i-%i),", id, lun));
1619 pDCB = dc390_findDCB (pACB, id, lun);
1620 if (!pDCB)
1621 {
1622 printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1623 id, lun);
1624 return;
1625 }
1626 pACB->pActiveDCB = pDCB;
1627 /* TagQ: We expect a message soon, so never mind the exact SRB */
1628 if( pDCB->SyncMode & EN_TAG_QUEUEING )
1629 {
1630 pSRB = pACB->pTmpSRB;
1631 pDCB->pActiveSRB = pSRB;
1632 }
1633 else
1634 {
1635 pSRB = pDCB->pActiveSRB;
1636 if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1637 {
1638 pSRB= pACB->pTmpSRB;
1639 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1640 printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1641 id, lun);
1642 pDCB->pActiveSRB = pSRB;
1643 dc390_EnableMsgOut_Abort ( pACB, pSRB );
1644 }
1645 else
1646 {
1647 if( pDCB->DCBFlag & ABORT_DEV_ )
1648 {
1649 pSRB->SRBState = SRB_ABORT_SENT;
1650 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1651 id, lun);
1652 dc390_EnableMsgOut_Abort( pACB, pSRB );
1653 }
1654 else
1655 pSRB->SRBState = SRB_DATA_XFER;
1656 }
1657 }
1658
1659 DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1660 pSRB->ScsiPhase = SCSI_NOP0;
1661 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1662 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1663 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1664 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1665 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1666 DC390_write8 (CtrlReg4, pDCB->CtrlR4); /* ; Glitch eater */
1667 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); /* ;to release the /ACK signal */
1668 }
1669
1670 static int __inline__
1671 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1672 {
1673 struct scsi_cmnd *pcmd;
1674
1675 pcmd = pSRB->pcmd;
1676
1677 REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1678 pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1679
1680 pSRB->SRBFlag |= AUTO_REQSENSE;
1681 pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1682 pSRB->AdaptStatus = 0;
1683 pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1684
1685 /* We are called from SRBdone, original PCI mapping has been removed
1686 * already, new one is set up from StartSCSI */
1687 pSRB->SGIndex = 0;
1688
1689 pSRB->TotalXferredLen = 0;
1690 pSRB->SGToBeXferLen = 0;
1691 return dc390_StartSCSI(pACB, pDCB, pSRB);
1692 }
1693
1694
1695 static void
1696 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1697 {
1698 u8 status;
1699 struct scsi_cmnd *pcmd;
1700
1701 pcmd = pSRB->pcmd;
1702 /* KG: Moved pci_unmap here */
1703 dc390_pci_unmap(pSRB);
1704
1705 status = pSRB->TargetStatus;
1706
1707 DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1708 pSRB, pcmd->serial_number));
1709 if(pSRB->SRBFlag & AUTO_REQSENSE)
1710 { /* Last command was a Request Sense */
1711 pSRB->SRBFlag &= ~AUTO_REQSENSE;
1712 pSRB->AdaptStatus = 0;
1713 pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;
1714
1715 //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1716 if (status == SAM_STAT_CHECK_CONDITION)
1717 pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1718 else /* Retry */
1719 {
1720 if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1721 {
1722 /* Don't retry on TEST_UNIT_READY */
1723 pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
1724 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1725 (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1726 } else {
1727 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1728 //pSRB->ScsiCmdLen = (u8) (pSRB->Segment1[0] >> 8);
1729 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1730 pSRB->TotalXferredLen = 0;
1731 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1732 }
1733 }
1734 goto cmd_done;
1735 }
1736 if( status )
1737 {
1738 if (status == SAM_STAT_CHECK_CONDITION)
1739 {
1740 if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1741 SET_RES_DID(pcmd->result, DID_ERROR);
1742 goto cmd_done;
1743 }
1744 return;
1745 }
1746 else if (status == SAM_STAT_TASK_SET_FULL)
1747 {
1748 scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1749 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1750 pSRB->TotalXferredLen = 0;
1751 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1752 }
1753 else if (status == SAM_STAT_BUSY &&
1754 (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1755 pACB->scan_devices)
1756 {
1757 pSRB->AdaptStatus = 0;
1758 pSRB->TargetStatus = status;
1759 pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1760 }
1761 else
1762 { /* Another error */
1763 pSRB->TotalXferredLen = 0;
1764 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1765 goto cmd_done;
1766 }
1767 }
1768 else
1769 { /* Target status == 0 */
1770 status = pSRB->AdaptStatus;
1771 if (status == H_OVER_UNDER_RUN)
1772 {
1773 pSRB->TargetStatus = 0;
1774 SET_RES_DID(pcmd->result,DID_OK);
1775 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1776 }
1777 else if (status == H_SEL_TIMEOUT)
1778 {
1779 pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
1780 /* Devices are removed below ... */
1781 }
1782 else if( pSRB->SRBStatus & PARITY_ERROR)
1783 {
1784 //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1785 SET_RES_DID(pcmd->result,DID_PARITY);
1786 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1787 }
1788 else /* No error */
1789 {
1790 pSRB->AdaptStatus = 0;
1791 pSRB->TargetStatus = 0;
1792 SET_RES_DID(pcmd->result,DID_OK);
1793 }
1794 }
1795
1796 cmd_done:
1797 scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
1798
1799 dc390_Going_remove (pDCB, pSRB);
1800 /* Add to free list */
1801 dc390_Free_insert (pACB, pSRB);
1802
1803 DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->serial_number));
1804 pcmd->scsi_done (pcmd);
1805
1806 return;
1807 }
1808
1809
1810 /* Remove all SRBs from Going list and inform midlevel */
1811 static void
1812 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1813 {
1814 struct dc390_dcb *pDCB, *pdcb;
1815 struct dc390_srb *psrb, *psrb2;
1816 int i;
1817 struct scsi_cmnd *pcmd;
1818
1819 pDCB = pACB->pLinkDCB;
1820 pdcb = pDCB;
1821 if (! pdcb) return;
1822 do
1823 {
1824 psrb = pdcb->pGoingSRB;
1825 for (i = 0; i < pdcb->GoingSRBCnt; i++)
1826 {
1827 psrb2 = psrb->pNextSRB;
1828 pcmd = psrb->pcmd;
1829 dc390_Free_insert (pACB, psrb);
1830 psrb = psrb2;
1831 }
1832 pdcb->GoingSRBCnt = 0;
1833 pdcb->pGoingSRB = NULL;
1834 pdcb->TagMask = 0;
1835 pdcb = pdcb->pNextDCB;
1836 } while( pdcb != pDCB );
1837 }
1838
1839
1840 static void
1841 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1842 {
1843 //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1844 //udelay (250);
1845 //DC390_write8 (ScsiCmd, NOP_CMD);
1846
1847 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1848 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1849 DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1850 pACB->Connected = 0;
1851
1852 return;
1853 }
1854
1855 static void
1856 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1857 {
1858 printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1859 //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1860
1861 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1862 /* Unlock before ? */
1863 /* delay half a second */
1864 udelay (1000);
1865 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1866 pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1867 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1868 pACB->Connected = 0;
1869
1870 if( pACB->ACBFlag & RESET_DEV )
1871 pACB->ACBFlag |= RESET_DONE;
1872 else
1873 { /* Reset was issued by sb else */
1874 pACB->ACBFlag |= RESET_DETECT;
1875
1876 dc390_ResetDevParam( pACB );
1877 dc390_DoingSRB_Done( pACB, NULL);
1878 //dc390_RecoverSRB( pACB );
1879 pACB->pActiveDCB = NULL;
1880 pACB->ACBFlag = 0;
1881 }
1882 return;
1883 }
1884
1885 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1886 void (*done)(struct scsi_cmnd *))
1887 {
1888 struct scsi_device *sdev = cmd->device;
1889 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1890 struct dc390_dcb *dcb = sdev->hostdata;
1891 struct dc390_srb *srb;
1892
1893 if (sdev->queue_depth <= dcb->GoingSRBCnt)
1894 goto device_busy;
1895 if (acb->pActiveDCB)
1896 goto host_busy;
1897 if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1898 goto host_busy;
1899
1900 srb = acb->pFreeSRB;
1901 if (unlikely(srb == NULL))
1902 goto host_busy;
1903
1904 cmd->scsi_done = done;
1905 cmd->result = 0;
1906 acb->Cmds++;
1907
1908 acb->pFreeSRB = srb->pNextSRB;
1909 srb->pNextSRB = NULL;
1910
1911 srb->pSRBDCB = dcb;
1912 srb->pcmd = cmd;
1913 cmd->host_scribble = (char *)srb;
1914
1915 srb->SGIndex = 0;
1916 srb->AdaptStatus = 0;
1917 srb->TargetStatus = 0;
1918 srb->MsgCnt = 0;
1919
1920 srb->SRBStatus = 0;
1921 srb->SRBFlag = 0;
1922 srb->SRBState = 0;
1923 srb->TotalXferredLen = 0;
1924 srb->SGBusAddr = 0;
1925 srb->SGToBeXferLen = 0;
1926 srb->ScsiPhase = 0;
1927 srb->EndMessage = 0;
1928 srb->TagNumber = SCSI_NO_TAG;
1929
1930 if (dc390_StartSCSI(acb, dcb, srb)) {
1931 dc390_Free_insert(acb, srb);
1932 goto host_busy;
1933 }
1934
1935 dc390_Going_append(dcb, srb);
1936
1937 return 0;
1938
1939 host_busy:
1940 return SCSI_MLQUEUE_HOST_BUSY;
1941
1942 device_busy:
1943 return SCSI_MLQUEUE_DEVICE_BUSY;
1944 }
1945
1946 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1947 {
1948 struct pci_dev *pdev;
1949 u16 pstat;
1950
1951 if (!pDCB) pDCB = pACB->pActiveDCB;
1952 if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1953
1954 if (pSRB)
1955 {
1956 printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1957 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1958 pSRB->ScsiPhase);
1959 printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1960 }
1961 printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1962 printk ("DC390: Register dump: SCSI block:\n");
1963 printk ("DC390: XferCnt Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1964 printk ("DC390: %06x %02x %02x %02x",
1965 DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1966 DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1967 printk (" %02x %02x %02x %02x %02x %02x\n",
1968 DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1969 DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1970 DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1971 if (DC390_read8(Current_Fifo) & 0x1f)
1972 {
1973 printk ("DC390: FIFO:");
1974 while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1975 printk ("\n");
1976 }
1977 printk ("DC390: Register dump: DMA engine:\n");
1978 printk ("DC390: Cmd STrCnt SBusA WrkBC WrkAC Stat SBusCtrl\n");
1979 printk ("DC390: %02x %08x %08x %08x %08x %02x %08x\n",
1980 DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1981 DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1982 DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1983 DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1984
1985 pdev = pACB->pdev;
1986 pci_read_config_word(pdev, PCI_STATUS, &pstat);
1987 printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
1988 printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
1989 }
1990
1991
1992 static int DC390_abort(struct scsi_cmnd *cmd)
1993 {
1994 struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
1995 struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
1996
1997 scmd_printk(KERN_WARNING, cmd,
1998 "DC390: Abort command (pid %li)\n", cmd->serial_number);
1999
2000 /* abort() is too stupid for already sent commands at the moment.
2001 * If it's called we are in trouble anyway, so let's dump some info
2002 * into the syslog at least. (KG, 98/08/20,99/06/20) */
2003 dc390_dumpinfo(pACB, pDCB, NULL);
2004
2005 pDCB->DCBFlag |= ABORT_DEV_;
2006 printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->serial_number);
2007
2008 return FAILED;
2009 }
2010
2011
2012 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2013 {
2014 struct dc390_dcb *pDCB, *pdcb;
2015
2016 pDCB = pACB->pLinkDCB;
2017 if (! pDCB) return;
2018 pdcb = pDCB;
2019 do
2020 {
2021 pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2022 pDCB->SyncPeriod = 0;
2023 pDCB->SyncOffset = 0;
2024 pDCB->TagMask = 0;
2025 pDCB->CtrlR3 = FAST_CLK;
2026 pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2027 pDCB->CtrlR4 |= pACB->glitch_cfg;
2028 pDCB = pDCB->pNextDCB;
2029 }
2030 while( pdcb != pDCB );
2031 pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2032
2033 }
2034
2035 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2036 {
2037 struct dc390_acb* pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2038 u8 bval;
2039
2040 spin_lock_irq(cmd->device->host->host_lock);
2041
2042 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2043 DC390_write8(CtrlReg1, bval); /* disable IRQ on bus reset */
2044
2045 pACB->ACBFlag |= RESET_DEV;
2046 dc390_ResetSCSIBus(pACB);
2047
2048 dc390_ResetDevParam(pACB);
2049 mdelay(1);
2050 pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2051 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2052
2053 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2054 DC390_read8(INT_Status); /* Reset Pending INT */
2055
2056 dc390_DoingSRB_Done(pACB, cmd);
2057
2058 pACB->pActiveDCB = NULL;
2059 pACB->ACBFlag = 0;
2060
2061 bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2062 DC390_write8(CtrlReg1, bval); /* re-enable interrupt */
2063
2064 spin_unlock_irq(cmd->device->host->host_lock);
2065
2066 return SUCCESS;
2067 }
2068
2069 /**
2070 * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2071 * scsi device that we need to deal with.
2072 *
2073 * @scsi_device: The new scsi device that we need to handle.
2074 */
2075 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2076 {
2077 struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2078 struct dc390_dcb *pDCB, *pDCB2 = NULL;
2079 uint id = scsi_device->id;
2080 uint lun = scsi_device->lun;
2081
2082 pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2083 if (!pDCB)
2084 return -ENOMEM;
2085
2086 if (!pACB->DCBCnt++) {
2087 pACB->pLinkDCB = pDCB;
2088 pACB->pDCBRunRobin = pDCB;
2089 } else {
2090 pACB->pLastDCB->pNextDCB = pDCB;
2091 }
2092
2093 pDCB->pNextDCB = pACB->pLinkDCB;
2094 pACB->pLastDCB = pDCB;
2095
2096 pDCB->pDCBACB = pACB;
2097 pDCB->TargetID = id;
2098 pDCB->TargetLUN = lun;
2099
2100 /*
2101 * Some values are for all LUNs: Copy them
2102 * In a clean way: We would have an own structure for a SCSI-ID
2103 */
2104 if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2105 pDCB->DevMode = pDCB2->DevMode;
2106 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2107 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2108 pDCB->SyncOffset = pDCB2->SyncOffset;
2109 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2110
2111 pDCB->CtrlR3 = pDCB2->CtrlR3;
2112 pDCB->CtrlR4 = pDCB2->CtrlR4;
2113 } else {
2114 u8 index = pACB->AdapterIndex;
2115 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2116
2117 pDCB->DevMode = prom->EE_MODE1;
2118 pDCB->NegoPeriod =
2119 (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2120 pDCB->CtrlR3 = FAST_CLK;
2121 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2122 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2123 pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2124 }
2125
2126 if (pDCB->DevMode & SYNC_NEGO_)
2127 pDCB->SyncMode |= SYNC_ENABLE;
2128 else {
2129 pDCB->SyncMode = 0;
2130 pDCB->SyncOffset &= ~0x0f;
2131 }
2132
2133 pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2134 if (pDCB->DevMode & PARITY_CHK_)
2135 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2136
2137 pACB->scan_devices = 1;
2138 scsi_device->hostdata = pDCB;
2139 return 0;
2140 }
2141
2142 /**
2143 * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2144 * device that is going away.
2145 *
2146 * @scsi_device: The scsi device that we need to remove.
2147 */
2148 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2149 {
2150 struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2151 struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2152 struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2153
2154 pACB->scan_devices = 0;
2155
2156 BUG_ON(pDCB->GoingSRBCnt > 1);
2157
2158 if (pDCB == pACB->pLinkDCB) {
2159 if (pACB->pLastDCB == pDCB) {
2160 pDCB->pNextDCB = NULL;
2161 pACB->pLastDCB = NULL;
2162 }
2163 pACB->pLinkDCB = pDCB->pNextDCB;
2164 } else {
2165 while (pPrevDCB->pNextDCB != pDCB)
2166 pPrevDCB = pPrevDCB->pNextDCB;
2167 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2168 if (pDCB == pACB->pLastDCB)
2169 pACB->pLastDCB = pPrevDCB;
2170 }
2171
2172 if (pDCB == pACB->pActiveDCB)
2173 pACB->pActiveDCB = NULL;
2174 if (pDCB == pACB->pLinkDCB)
2175 pACB->pLinkDCB = pDCB->pNextDCB;
2176 if (pDCB == pACB->pDCBRunRobin)
2177 pACB->pDCBRunRobin = pDCB->pNextDCB;
2178 kfree(pDCB);
2179
2180 pACB->DCBCnt--;
2181 }
2182
2183 static int dc390_slave_configure(struct scsi_device *sdev)
2184 {
2185 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2186 struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2187
2188 acb->scan_devices = 0;
2189 if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2190 dcb->SyncMode |= EN_TAG_QUEUEING;
2191 scsi_activate_tcq(sdev, acb->TagMaxNum);
2192 }
2193
2194 return 0;
2195 }
2196
2197 static struct scsi_host_template driver_template = {
2198 .module = THIS_MODULE,
2199 .proc_name = "tmscsim",
2200 .name = DC390_BANNER " V" DC390_VERSION,
2201 .slave_alloc = dc390_slave_alloc,
2202 .slave_configure = dc390_slave_configure,
2203 .slave_destroy = dc390_slave_destroy,
2204 .queuecommand = DC390_queuecommand,
2205 .eh_abort_handler = DC390_abort,
2206 .eh_bus_reset_handler = DC390_bus_reset,
2207 .can_queue = 1,
2208 .this_id = 7,
2209 .sg_tablesize = SG_ALL,
2210 .cmd_per_lun = 1,
2211 .use_clustering = ENABLE_CLUSTERING,
2212 .max_sectors = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2213 };
2214
2215 /***********************************************************************
2216 * Functions for access to DC390 EEPROM
2217 * and some to emulate it
2218 *
2219 **********************************************************************/
2220
2221 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2222 {
2223 u8 carryFlag = 1, j = 0x80, bval;
2224 int i;
2225
2226 for (i = 0; i < 9; i++) {
2227 if (carryFlag) {
2228 pci_write_config_byte(pdev, 0x80, 0x40);
2229 bval = 0xc0;
2230 } else
2231 bval = 0x80;
2232
2233 udelay(160);
2234 pci_write_config_byte(pdev, 0x80, bval);
2235 udelay(160);
2236 pci_write_config_byte(pdev, 0x80, 0);
2237 udelay(160);
2238
2239 carryFlag = (cmd & j) ? 1 : 0;
2240 j >>= 1;
2241 }
2242 }
2243
2244 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2245 {
2246 int i;
2247 u16 wval = 0;
2248 u8 bval;
2249
2250 for (i = 0; i < 16; i++) {
2251 wval <<= 1;
2252
2253 pci_write_config_byte(pdev, 0x80, 0x80);
2254 udelay(160);
2255 pci_write_config_byte(pdev, 0x80, 0x40);
2256 udelay(160);
2257 pci_read_config_byte(pdev, 0x00, &bval);
2258
2259 if (bval == 0x22)
2260 wval |= 1;
2261 }
2262
2263 return wval;
2264 }
2265
2266 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2267 {
2268 u8 cmd = EEPROM_READ, i;
2269
2270 for (i = 0; i < 0x40; i++) {
2271 pci_write_config_byte(pdev, 0xc0, 0);
2272 udelay(160);
2273
2274 dc390_eeprom_prepare_read(pdev, cmd++);
2275 *ptr++ = dc390_eeprom_get_data(pdev);
2276
2277 pci_write_config_byte(pdev, 0x80, 0);
2278 pci_write_config_byte(pdev, 0x80, 0);
2279 udelay(160);
2280 }
2281 }
2282
2283 /* Override EEprom values with explicitly set values */
2284 static void __devinit dc390_eeprom_override(u8 index)
2285 {
2286 u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2287
2288 /* Adapter Settings */
2289 if (tmscsim[0] != -2)
2290 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2291 if (tmscsim[3] != -2)
2292 ptr[EE_MODE2] = (u8)tmscsim[3];
2293 if (tmscsim[5] != -2)
2294 ptr[EE_DELAY] = tmscsim[5]; /* Reset delay */
2295 if (tmscsim[4] != -2)
2296 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4]; /* Tagged Cmds */
2297
2298 /* Device Settings */
2299 for (id = 0; id < MAX_SCSI_ID; id++) {
2300 if (tmscsim[2] != -2)
2301 ptr[id << 2] = (u8)tmscsim[2]; /* EE_MODE1 */
2302 if (tmscsim[1] != -2)
2303 ptr[(id << 2) + 1] = (u8)tmscsim[1]; /* EE_Speed */
2304 }
2305 }
2306
2307 static int __devinitdata tmscsim_def[] = {
2308 7,
2309 0 /* 10MHz */,
2310 PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2311 MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2312 3 /* 16 Tags per LUN */,
2313 1 /* s delay after Reset */,
2314 };
2315
2316 /* Copy defaults over set values where missing */
2317 static void __devinit dc390_fill_with_defaults (void)
2318 {
2319 int i;
2320
2321 for (i = 0; i < 6; i++) {
2322 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2323 tmscsim[i] = tmscsim_def[i];
2324 }
2325
2326 /* Sanity checks */
2327 if (tmscsim[0] > 7)
2328 tmscsim[0] = 7;
2329 if (tmscsim[1] > 7)
2330 tmscsim[1] = 4;
2331 if (tmscsim[4] > 5)
2332 tmscsim[4] = 4;
2333 if (tmscsim[5] > 180)
2334 tmscsim[5] = 180;
2335 }
2336
2337 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2338 {
2339 u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2340 u8 EEbuf[128];
2341 u16 *ptr = (u16 *)EEbuf, wval = 0;
2342 int i;
2343
2344 dc390_read_eeprom(pdev, ptr);
2345 memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2346 memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2347 &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2348
2349 dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2350
2351 for (i = 0; i < 0x40; i++, ptr++)
2352 wval += *ptr;
2353
2354 /* no Tekram EEprom found */
2355 if (wval != 0x1234) {
2356 int speed;
2357
2358 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2359
2360 /*
2361 * XXX(hch): bogus, because we might have tekram and
2362 * non-tekram hbas in a single machine.
2363 */
2364 dc390_fill_with_defaults();
2365
2366 speed = dc390_clock_speed[tmscsim[1]];
2367 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2368 "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2369 tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2370 (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2371 }
2372 }
2373
2374 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2375 {
2376 struct Scsi_Host *shost = pACB->pScsiHost;
2377 u8 dstate;
2378
2379 /* Disable SCSI bus reset interrupt */
2380 DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2381
2382 if (pACB->Gmode2 & RST_SCSI_BUS) {
2383 dc390_ResetSCSIBus(pACB);
2384 udelay(1000);
2385 shost->last_reset = jiffies + HZ/2 +
2386 HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2387 }
2388
2389 pACB->ACBFlag = 0;
2390
2391 /* Reset Pending INT */
2392 DC390_read8(INT_Status);
2393
2394 /* 250ms selection timeout */
2395 DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2396
2397 /* Conversion factor = 0 , 40MHz clock */
2398 DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2399
2400 /* NOP cmd - clear command register */
2401 DC390_write8(ScsiCmd, NOP_CMD);
2402
2403 /* Enable Feature and SCSI-2 */
2404 DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2405
2406 /* Fast clock */
2407 DC390_write8(CtrlReg3, FAST_CLK);
2408
2409 /* Negation */
2410 DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2411 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2412 NEGATE_REQACKDATA : 0);
2413
2414 /* Clear Transfer Count High: ID */
2415 DC390_write8(CtcReg_High, 0);
2416 DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2417 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2418 DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2419
2420 dstate = DC390_read8(DMA_Status);
2421 DC390_write8(DMA_Status, dstate);
2422 }
2423
2424 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2425 const struct pci_device_id *id)
2426 {
2427 struct dc390_acb *pACB;
2428 struct Scsi_Host *shost;
2429 unsigned long io_port;
2430 int error = -ENODEV, i;
2431
2432 if (pci_enable_device(pdev))
2433 goto out;
2434
2435 pci_set_master(pdev);
2436
2437 error = -ENOMEM;
2438 if (disable_clustering)
2439 driver_template.use_clustering = DISABLE_CLUSTERING;
2440 shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2441 if (!shost)
2442 goto out_disable_device;
2443
2444 pACB = (struct dc390_acb *)shost->hostdata;
2445 memset(pACB, 0, sizeof(struct dc390_acb));
2446
2447 dc390_check_eeprom(pdev, dc390_adapterCnt);
2448 dc390_eeprom_override(dc390_adapterCnt);
2449
2450 io_port = pci_resource_start(pdev, 0);
2451
2452 shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2453 shost->io_port = io_port;
2454 shost->n_io_port = 0x80;
2455 shost->irq = pdev->irq;
2456 shost->base = io_port;
2457 shost->unique_id = io_port;
2458 shost->last_reset = jiffies;
2459
2460 pACB->pScsiHost = shost;
2461 pACB->IOPortBase = (u16) io_port;
2462 pACB->IRQLevel = pdev->irq;
2463
2464 shost->max_id = 8;
2465
2466 if (shost->max_id - 1 ==
2467 dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2468 shost->max_id--;
2469
2470 if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2471 shost->max_lun = 8;
2472 else
2473 shost->max_lun = 1;
2474
2475 pACB->pFreeSRB = pACB->SRB_array;
2476 pACB->SRBCount = MAX_SRB_CNT;
2477 pACB->AdapterIndex = dc390_adapterCnt;
2478 pACB->TagMaxNum =
2479 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2480 pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2481
2482 for (i = 0; i < pACB->SRBCount-1; i++)
2483 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2484 pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2485 pACB->pTmpSRB = &pACB->TmpSRB;
2486
2487 pACB->sel_timeout = SEL_TIMEOUT;
2488 pACB->glitch_cfg = EATER_25NS;
2489 pACB->pdev = pdev;
2490
2491 if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2492 printk(KERN_ERR "DC390: register IO ports error!\n");
2493 goto out_host_put;
2494 }
2495
2496 /* Reset Pending INT */
2497 DC390_read8_(INT_Status, io_port);
2498
2499 if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2500 "tmscsim", pACB)) {
2501 printk(KERN_ERR "DC390: register IRQ error!\n");
2502 goto out_release_region;
2503 }
2504
2505 dc390_init_hw(pACB, dc390_adapterCnt);
2506
2507 dc390_adapterCnt++;
2508
2509 pci_set_drvdata(pdev, shost);
2510
2511 error = scsi_add_host(shost, &pdev->dev);
2512 if (error)
2513 goto out_free_irq;
2514 scsi_scan_host(shost);
2515 return 0;
2516
2517 out_free_irq:
2518 free_irq(pdev->irq, pACB);
2519 out_release_region:
2520 release_region(io_port, shost->n_io_port);
2521 out_host_put:
2522 scsi_host_put(shost);
2523 out_disable_device:
2524 pci_disable_device(pdev);
2525 out:
2526 return error;
2527 }
2528
2529 /**
2530 * dc390_remove_one - Called to remove a single instance of the adapter.
2531 *
2532 * @dev: The PCI device to remove.
2533 */
2534 static void __devexit dc390_remove_one(struct pci_dev *dev)
2535 {
2536 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2537 unsigned long iflags;
2538 struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2539 u8 bval;
2540
2541 scsi_remove_host(scsi_host);
2542
2543 spin_lock_irqsave(scsi_host->host_lock, iflags);
2544 pACB->ACBFlag = RESET_DEV;
2545 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2546 DC390_write8 (CtrlReg1, bval); /* disable interrupt */
2547 if (pACB->Gmode2 & RST_SCSI_BUS)
2548 dc390_ResetSCSIBus(pACB);
2549 spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2550
2551 free_irq(scsi_host->irq, pACB);
2552 release_region(scsi_host->io_port, scsi_host->n_io_port);
2553
2554 pci_disable_device(dev);
2555 scsi_host_put(scsi_host);
2556 pci_set_drvdata(dev, NULL);
2557 }
2558
2559 static struct pci_device_id tmscsim_pci_tbl[] = {
2560 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2561 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2562 { }
2563 };
2564 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2565
2566 static struct pci_driver dc390_driver = {
2567 .name = "tmscsim",
2568 .id_table = tmscsim_pci_tbl,
2569 .probe = dc390_probe_one,
2570 .remove = __devexit_p(dc390_remove_one),
2571 };
2572
2573 static int __init dc390_module_init(void)
2574 {
2575 if (!disable_clustering)
2576 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
2577 "\twith \"disable_clustering=1\" and report to maintainers\n");
2578
2579 if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2580 tmscsim[0] = 7;
2581 tmscsim[1] = 4;
2582 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2583 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2584 tmscsim[4] = 2;
2585 tmscsim[5] = 10;
2586 printk (KERN_INFO "DC390: Using safe settings.\n");
2587 }
2588
2589 return pci_register_driver(&dc390_driver);
2590 }
2591
2592 static void __exit dc390_module_exit(void)
2593 {
2594 pci_unregister_driver(&dc390_driver);
2595 }
2596
2597 module_init(dc390_module_init);
2598 module_exit(dc390_module_exit);
2599
2600 #ifndef MODULE
2601 static int __init dc390_setup (char *str)
2602 {
2603 int ints[8],i, im;
2604
2605 get_options(str, ARRAY_SIZE(ints), ints);
2606 im = ints[0];
2607
2608 if (im > 6) {
2609 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2610 im = 6;
2611 }
2612
2613 for (i = 0; i < im; i++)
2614 tmscsim[i] = ints[i+1];
2615 /* dc390_checkparams (); */
2616 return 1;
2617 }
2618
2619 __setup("tmscsim=", dc390_setup);
2620 #endif
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