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[ARM] Add fallocate syscall entry
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / scsi / tmscsim.c
blob5db1520f8ba968a48a9bcc783d2e100cc5d0c98f
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 memset(sg, 0, sizeof(struct scatterlist));
434 sg->page = virt_to_page(addr);
435 sg->length = length;
436 sg->offset = (unsigned long)addr & ~PAGE_MASK;
437 return sg;
438 }
439
440 /* Create pci mapping */
441 static int dc390_pci_map (struct dc390_srb* pSRB)
442 {
443 int error = 0;
444 struct scsi_cmnd *pcmd = pSRB->pcmd;
445 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
446 dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
447
448 /* Map sense buffer */
449 if (pSRB->SRBFlag & AUTO_REQSENSE) {
450 pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
451 pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1,
452 DMA_FROM_DEVICE);
453 cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList);
454
455 /* TODO: error handling */
456 if (pSRB->SGcount != 1)
457 error = 1;
458 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
459 /* Map SG list */
460 } else if (scsi_sg_count(pcmd)) {
461 int nseg;
462
463 nseg = scsi_dma_map(pcmd);
464
465 pSRB->pSegmentList = scsi_sglist(pcmd);
466 pSRB->SGcount = nseg;
467
468 /* TODO: error handling */
469 if (nseg < 0)
470 error = 1;
471 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
472 __FUNCTION__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
473 /* Map single segment */
474 } else
475 pSRB->SGcount = 0;
476
477 return error;
478 }
479
480 /* Remove pci mapping */
481 static void dc390_pci_unmap (struct dc390_srb* pSRB)
482 {
483 struct scsi_cmnd *pcmd = pSRB->pcmd;
484 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
485 DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
486
487 if (pSRB->SRBFlag) {
488 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
489 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
490 } else {
491 scsi_dma_unmap(pcmd);
492 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
493 __FUNCTION__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
494 }
495 }
496
497 static void __inline__
498 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
499 {
500 if (pSRB->TagNumber != SCSI_NO_TAG) {
501 pDCB->TagMask &= ~(1 << pSRB->TagNumber); /* free tag mask */
502 pSRB->TagNumber = SCSI_NO_TAG;
503 }
504 }
505
506
507 static int
508 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
509 {
510 struct scsi_cmnd *scmd = pSRB->pcmd;
511 struct scsi_device *sdev = scmd->device;
512 u8 cmd, disc_allowed, try_sync_nego;
513 char tag[2];
514
515 pSRB->ScsiPhase = SCSI_NOP0;
516
517 if (pACB->Connected)
518 {
519 // Should not happen normally
520 printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
521 pSRB->SRBState, pSRB->SRBFlag);
522 pSRB->SRBState = SRB_READY;
523 pACB->SelConn++;
524 return 1;
525 }
526 if (time_before (jiffies, pACB->pScsiHost->last_reset))
527 {
528 DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
529 return 1;
530 }
531 /* KG: Moved pci mapping here */
532 dc390_pci_map(pSRB);
533 /* TODO: error handling */
534 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
535 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
536 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
537 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
538 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
539 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
540 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); /* Flush FIFO */
541 DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
542 scmd->cmnd[0], pDCB->SyncMode));
543
544 /* Don't disconnect on AUTO_REQSENSE, cause it might be an
545 * Contingent Allegiance Condition (6.6), where no tags should be used.
546 * All other have to be allowed to disconnect to prevent Incorrect
547 * Initiator Connection (6.8.2/6.5.2) */
548 /* Changed KG, 99/06/06 */
549 if (! (pSRB->SRBFlag & AUTO_REQSENSE))
550 disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
551 else
552 disc_allowed = 0;
553
554 if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
555 (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
556 !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
557 try_sync_nego = 1;
558 else
559 try_sync_nego = 0;
560
561 pSRB->MsgCnt = 0;
562 cmd = SEL_W_ATN;
563 DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
564 /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
565 if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
566 DC390_write8(ScsiFifo, tag[0]);
567 pDCB->TagMask |= 1 << tag[1];
568 pSRB->TagNumber = tag[1];
569 DC390_write8(ScsiFifo, tag[1]);
570 DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->pid, pSRB, tag[1]));
571 cmd = SEL_W_ATN3;
572 } else {
573 /* No TagQ */
574 //no_tag:
575 DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->pid, pSRB));
576 }
577
578 pSRB->SRBState = SRB_START_;
579
580 if (try_sync_nego)
581 {
582 u8 Sync_Off = pDCB->SyncOffset;
583 DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
584 pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
585 pSRB->MsgOutBuf[1] = 3;
586 pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
587 pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
588 if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
589 pSRB->MsgOutBuf[4] = Sync_Off;
590 pSRB->MsgCnt = 5;
591 //pSRB->SRBState = SRB_MSGOUT_;
592 pSRB->SRBState |= DO_SYNC_NEGO;
593 cmd = SEL_W_ATN_STOP;
594 }
595
596 /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
597 if (cmd != SEL_W_ATN_STOP)
598 {
599 if( pSRB->SRBFlag & AUTO_REQSENSE )
600 {
601 DC390_write8 (ScsiFifo, REQUEST_SENSE);
602 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
603 DC390_write8 (ScsiFifo, 0);
604 DC390_write8 (ScsiFifo, 0);
605 DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
606 DC390_write8 (ScsiFifo, 0);
607 DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
608 }
609 else /* write cmnd to bus */
610 {
611 u8 *ptr; u8 i;
612 ptr = (u8 *)scmd->cmnd;
613 for (i = 0; i < scmd->cmd_len; i++)
614 DC390_write8 (ScsiFifo, *(ptr++));
615 }
616 }
617 DEBUG0(if (pACB->pActiveDCB) \
618 printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
619 DEBUG0(if (pDCB->pActiveSRB) \
620 printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
621 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
622 if (DC390_read8 (Scsi_Status) & INTERRUPT)
623 {
624 dc390_freetag (pDCB, pSRB);
625 DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
626 scmd->pid, scmd->device->id, scmd->device->lun));
627 pSRB->SRBState = SRB_READY;
628 //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
629 pACB->SelLost++;
630 return 1;
631 }
632 DC390_write8 (ScsiCmd, cmd);
633 pACB->pActiveDCB = pDCB;
634 pDCB->pActiveSRB = pSRB;
635 pACB->Connected = 1;
636 pSRB->ScsiPhase = SCSI_NOP1;
637 return 0;
638 }
639
640
641 static void __inline__
642 dc390_InvalidCmd(struct dc390_acb* pACB)
643 {
644 if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
645 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
646 }
647
648
649 static irqreturn_t __inline__
650 DC390_Interrupt(void *dev_id)
651 {
652 struct dc390_acb *pACB = dev_id;
653 struct dc390_dcb *pDCB;
654 struct dc390_srb *pSRB;
655 u8 sstatus=0;
656 u8 phase;
657 void (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
658 u8 istate, istatus;
659
660 sstatus = DC390_read8 (Scsi_Status);
661 if( !(sstatus & INTERRUPT) )
662 return IRQ_NONE;
663
664 DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
665
666 //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
667 //dstatus = DC390_read8 (DMA_Status);
668 //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
669
670 spin_lock_irq(pACB->pScsiHost->host_lock);
671
672 istate = DC390_read8 (Intern_State);
673 istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
674
675 DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
676 dc390_laststatus &= ~0x00ffffff;
677 dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
678
679 if (sstatus & ILLEGAL_OP_ERR)
680 {
681 printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
682 dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
683 }
684
685 else if (istatus & INVALID_CMD)
686 {
687 printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
688 dc390_InvalidCmd( pACB );
689 goto unlock;
690 }
691
692 if (istatus & SCSI_RESET)
693 {
694 dc390_ScsiRstDetect( pACB );
695 goto unlock;
696 }
697
698 if (istatus & DISCONNECTED)
699 {
700 dc390_Disconnect( pACB );
701 goto unlock;
702 }
703
704 if (istatus & RESELECTED)
705 {
706 dc390_Reselect( pACB );
707 goto unlock;
708 }
709
710 else if (istatus & (SELECTED | SEL_ATTENTION))
711 {
712 printk (KERN_ERR "DC390: Target mode not supported!\n");
713 goto unlock;
714 }
715
716 if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
717 {
718 pDCB = pACB->pActiveDCB;
719 if (!pDCB)
720 {
721 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
722 goto unlock;
723 }
724 pSRB = pDCB->pActiveSRB;
725 if( pDCB->DCBFlag & ABORT_DEV_ )
726 dc390_EnableMsgOut_Abort (pACB, pSRB);
727
728 phase = pSRB->ScsiPhase;
729 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
730 stateV = (void *) dc390_phase0[phase];
731 ( *stateV )( pACB, pSRB, &sstatus );
732
733 pSRB->ScsiPhase = sstatus & 7;
734 phase = (u8) sstatus & 7;
735 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
736 stateV = (void *) dc390_phase1[phase];
737 ( *stateV )( pACB, pSRB, &sstatus );
738 }
739
740 unlock:
741 spin_unlock_irq(pACB->pScsiHost->host_lock);
742 return IRQ_HANDLED;
743 }
744
745 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
746 {
747 irqreturn_t ret;
748 DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
749 /* Locking is done in DC390_Interrupt */
750 ret = DC390_Interrupt(dev_id);
751 DEBUG1(printk (".. IRQ returned\n"));
752 return ret;
753 }
754
755 static void
756 dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
757 {
758 u8 sstatus;
759 u32 ResidCnt;
760 u8 dstate = 0;
761
762 sstatus = *psstatus;
763
764 if( !(pSRB->SRBState & SRB_XFERPAD) )
765 {
766 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
767 pSRB->SRBStatus |= PARITY_ERROR;
768
769 if( sstatus & COUNT_2_ZERO )
770 {
771 unsigned long timeout = jiffies + HZ;
772
773 /* Function called from the ISR with the host_lock held and interrupts disabled */
774 if (pSRB->SGToBeXferLen)
775 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
776 spin_unlock_irq(pACB->pScsiHost->host_lock);
777 udelay(50);
778 spin_lock_irq(pACB->pScsiHost->host_lock);
779 }
780 if (!time_before(jiffies, timeout))
781 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
782 DC390_read32 (DMA_Wk_ByteCntr));
783 dc390_laststatus &= ~0xff000000;
784 dc390_laststatus |= dstate << 24;
785 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
786 pSRB->SGIndex++;
787 if( pSRB->SGIndex < pSRB->SGcount )
788 {
789 pSRB->pSegmentList++;
790
791 dc390_start_segment(pSRB);
792 }
793 else
794 pSRB->SGToBeXferLen = 0;
795 }
796 else
797 {
798 ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
799 (((u32) DC390_read8 (CtcReg_High) << 16) |
800 ((u32) DC390_read8 (CtcReg_Mid) << 8) |
801 (u32) DC390_read8 (CtcReg_Low));
802
803 dc390_advance_segment(pSRB, ResidCnt);
804 }
805 }
806 if ((*psstatus & 7) != SCSI_DATA_OUT)
807 {
808 DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
809 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
810 }
811 }
812
813 static void
814 dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
815 {
816 u8 sstatus, residual, bval;
817 u32 ResidCnt, i;
818 unsigned long xferCnt;
819
820 sstatus = *psstatus;
821
822 if( !(pSRB->SRBState & SRB_XFERPAD) )
823 {
824 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
825 pSRB->SRBStatus |= PARITY_ERROR;
826
827 if( sstatus & COUNT_2_ZERO )
828 {
829 int dstate = 0;
830 unsigned long timeout = jiffies + HZ;
831
832 /* Function called from the ISR with the host_lock held and interrupts disabled */
833 if (pSRB->SGToBeXferLen)
834 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
835 spin_unlock_irq(pACB->pScsiHost->host_lock);
836 udelay(50);
837 spin_lock_irq(pACB->pScsiHost->host_lock);
838 }
839 if (!time_before(jiffies, timeout)) {
840 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
841 DC390_read32 (DMA_Wk_ByteCntr));
842 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
843 }
844 dc390_laststatus &= ~0xff000000;
845 dc390_laststatus |= dstate << 24;
846 DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
847 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8) \
848 + ((unsigned long) DC390_read8 (CtcReg_Low)));
849 DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
850
851 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
852
853 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
854 pSRB->SGIndex++;
855 if( pSRB->SGIndex < pSRB->SGcount )
856 {
857 pSRB->pSegmentList++;
858
859 dc390_start_segment(pSRB);
860 }
861 else
862 pSRB->SGToBeXferLen = 0;
863 }
864 else /* phase changed */
865 {
866 residual = 0;
867 bval = DC390_read8 (Current_Fifo);
868 while( bval & 0x1f )
869 {
870 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
871 if( (bval & 0x1f) == 1 )
872 {
873 for(i=0; i < 0x100; i++)
874 {
875 bval = DC390_read8 (Current_Fifo);
876 if( !(bval & 0x1f) )
877 goto din_1;
878 else if( i == 0x0ff )
879 {
880 residual = 1; /* ;1 residual byte */
881 goto din_1;
882 }
883 }
884 }
885 else
886 bval = DC390_read8 (Current_Fifo);
887 }
888 din_1:
889 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
890 for (i = 0xa000; i; i--)
891 {
892 bval = DC390_read8 (DMA_Status);
893 if (bval & BLAST_COMPLETE)
894 break;
895 }
896 /* It seems a DMA Blast abort isn't that bad ... */
897 if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
898 //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
899 dc390_laststatus &= ~0xff000000;
900 dc390_laststatus |= bval << 24;
901
902 DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
903 ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
904 ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
905 (u32) DC390_read8 (CtcReg_Low);
906
907 xferCnt = dc390_advance_segment(pSRB, ResidCnt);
908
909 if (residual) {
910 size_t count = 1;
911 size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
912 unsigned long flags;
913 u8 *ptr;
914
915 bval = DC390_read8 (ScsiFifo); /* get one residual byte */
916
917 local_irq_save(flags);
918 ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
919 if (likely(ptr)) {
920 *(ptr + offset) = bval;
921 scsi_kunmap_atomic_sg(ptr);
922 }
923 local_irq_restore(flags);
924 WARN_ON(!ptr);
925
926 /* 1 more byte read */
927 xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
928 }
929 DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
930 pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
931 }
932 }
933 if ((*psstatus & 7) != SCSI_DATA_IN)
934 {
935 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
936 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
937 }
938 }
939
940 static void
941 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
942 {
943 }
944
945 static void
946 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
947 {
948
949 pSRB->TargetStatus = DC390_read8 (ScsiFifo);
950 //udelay (1);
951 pSRB->EndMessage = DC390_read8 (ScsiFifo); /* get message */
952
953 *psstatus = SCSI_NOP0;
954 pSRB->SRBState = SRB_COMPLETED;
955 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
956 }
957
958 static void
959 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
960 {
961 if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
962 *psstatus = SCSI_NOP0;
963 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
964 }
965
966
967 static void __inline__
968 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
969 {
970 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
971 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
972 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
973 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
974 dc390_SetXferRate (pACB, pDCB);
975 }
976
977
978 #ifdef DC390_DEBUG0
979 static void
980 dc390_printMsg (u8 *MsgBuf, u8 len)
981 {
982 int i;
983 printk (" %02x", MsgBuf[0]);
984 for (i = 1; i < len; i++)
985 printk (" %02x", MsgBuf[i]);
986 printk ("\n");
987 }
988 #endif
989
990 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
991
992 /* reject_msg */
993 static void __inline__
994 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
995 {
996 pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
997 pSRB->MsgCnt = 1;
998 DC390_ENABLE_MSGOUT;
999 DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
1000 }
1001
1002 /* abort command */
1003 static void
1004 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1005 {
1006 pSRB->MsgOutBuf[0] = ABORT;
1007 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1008 pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1009 }
1010
1011 static struct dc390_srb*
1012 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1013 {
1014 struct dc390_srb* pSRB = pDCB->pGoingSRB;
1015
1016 if (pSRB)
1017 {
1018 struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1019 pSRB = (struct dc390_srb *)scmd->host_scribble;
1020
1021 if (pDCB->DCBFlag & ABORT_DEV_)
1022 {
1023 pSRB->SRBState = SRB_ABORT_SENT;
1024 dc390_EnableMsgOut_Abort( pACB, pSRB );
1025 }
1026
1027 if (!(pSRB->SRBState & SRB_DISCONNECT))
1028 goto mingx0;
1029
1030 pDCB->pActiveSRB = pSRB;
1031 pSRB->SRBState = SRB_DATA_XFER;
1032 }
1033 else
1034 {
1035 mingx0:
1036 pSRB = pACB->pTmpSRB;
1037 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1038 pDCB->pActiveSRB = pSRB;
1039 pSRB->MsgOutBuf[0] = ABORT_TAG;
1040 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1041 }
1042 return pSRB;
1043 }
1044
1045
1046 /* set async transfer mode */
1047 static void
1048 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1049 {
1050 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1051 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1052 printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1053 pSRB->SRBState &= ~DO_SYNC_NEGO;
1054 pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1055 pDCB->SyncPeriod = 0;
1056 pDCB->SyncOffset = 0;
1057 //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1058 pDCB->CtrlR3 = FAST_CLK; /* fast clock / normal scsi */
1059 pDCB->CtrlR4 &= 0x3f;
1060 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1061 dc390_reprog (pACB, pDCB);
1062 }
1063
1064 /* set sync transfer mode */
1065 static void
1066 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1067 {
1068 u8 bval;
1069 u16 wval, wval1;
1070 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1071 u8 oldsyncperiod = pDCB->SyncPeriod;
1072 u8 oldsyncoffset = pDCB->SyncOffset;
1073
1074 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1075 {
1076 printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1077 pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1078
1079 /* reject */
1080 //dc390_MsgIn_reject (pACB, pSRB);
1081 //return dc390_MsgIn_set_async (pACB, pSRB);
1082
1083 /* Reply with corrected SDTR Message */
1084 if (pSRB->MsgInBuf[4] > 15)
1085 {
1086 printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1087 pSRB->MsgInBuf[4] = 15;
1088 }
1089 if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1090 {
1091 printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1092 pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1093 }
1094 memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1095 pSRB->MsgCnt = 5;
1096 DC390_ENABLE_MSGOUT;
1097 }
1098
1099 pSRB->SRBState &= ~DO_SYNC_NEGO;
1100 pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1101 pDCB->SyncOffset &= 0x0f0;
1102 pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1103 pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1104
1105 wval = (u16) pSRB->MsgInBuf[3];
1106 wval = wval << 2; wval -= 3; wval1 = wval / 25; /* compute speed */
1107 if( (wval1 * 25) != wval) wval1++;
1108 bval = FAST_CLK+FAST_SCSI; /* fast clock / fast scsi */
1109
1110 pDCB->CtrlR4 &= 0x3f; /* Glitch eater: 12ns less than normal */
1111 if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1112 pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1113 else
1114 pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1115 if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1116
1117 if (wval1 >= 8)
1118 {
1119 wval1--; /* Timing computation differs by 1 from FAST_SCSI */
1120 bval = FAST_CLK; /* fast clock / normal scsi */
1121 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1122 }
1123
1124 pDCB->CtrlR3 = bval;
1125 pDCB->SyncPeriod = (u8)wval1;
1126
1127 if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1128 {
1129 if (! (bval & FAST_SCSI)) wval1++;
1130 printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1131 40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1132 }
1133
1134 dc390_reprog (pACB, pDCB);
1135 }
1136
1137
1138 /* handle RESTORE_PTR */
1139 /* This doesn't look very healthy... to-be-fixed */
1140 static void
1141 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1142 {
1143 struct scsi_cmnd *pcmd = pSRB->pcmd;
1144 struct scatterlist *psgl;
1145 pSRB->TotalXferredLen = 0;
1146 pSRB->SGIndex = 0;
1147 if (scsi_sg_count(pcmd)) {
1148 size_t saved;
1149 pSRB->pSegmentList = scsi_sglist(pcmd);
1150 psgl = pSRB->pSegmentList;
1151 //dc390_pci_sync(pSRB);
1152
1153 while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1154 {
1155 pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1156 pSRB->SGIndex++;
1157 if( pSRB->SGIndex < pSRB->SGcount )
1158 {
1159 pSRB->pSegmentList++;
1160
1161 dc390_start_segment(pSRB);
1162 }
1163 else
1164 pSRB->SGToBeXferLen = 0;
1165 }
1166
1167 saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1168 pSRB->SGToBeXferLen -= saved;
1169 pSRB->SGBusAddr += saved;
1170 printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1171 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1172
1173 } else {
1174 pSRB->SGcount = 0;
1175 printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1176 }
1177
1178 pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1179 }
1180
1181
1182 /* According to the docs, the AM53C974 reads the message and
1183 * generates a Successful Operation IRQ before asserting ACK for
1184 * the last byte (how does it know whether it's the last ?) */
1185 /* The old code handled it in another way, indicating, that on
1186 * every message byte an IRQ is generated and every byte has to
1187 * be manually ACKed. Hmmm ? (KG, 98/11/28) */
1188 /* The old implementation was correct. Sigh! */
1189
1190 /* Check if the message is complete */
1191 static u8 __inline__
1192 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1193 {
1194 if (*msgbuf == EXTENDED_MESSAGE)
1195 {
1196 if (len < 2) return 0;
1197 if (len < msgbuf[1] + 2) return 0;
1198 }
1199 else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1200 if (len < 2) return 0;
1201 return 1;
1202 }
1203
1204
1205
1206 /* read and eval received messages */
1207 static void
1208 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1209 {
1210 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1211
1212 /* Read the msg */
1213
1214 pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1215 //pSRB->SRBState = 0;
1216
1217 /* Msg complete ? */
1218 if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1219 {
1220 DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1221 /* Now eval the msg */
1222 switch (pSRB->MsgInBuf[0])
1223 {
1224 case DISCONNECT:
1225 pSRB->SRBState = SRB_DISCONNECT; break;
1226
1227 case SIMPLE_QUEUE_TAG:
1228 case HEAD_OF_QUEUE_TAG:
1229 case ORDERED_QUEUE_TAG:
1230 pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1231 break;
1232
1233 case MESSAGE_REJECT:
1234 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1235 pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1236 if( pSRB->SRBState & DO_SYNC_NEGO)
1237 dc390_MsgIn_set_async (pACB, pSRB);
1238 break;
1239
1240 case EXTENDED_MESSAGE:
1241 /* reject every extended msg but SDTR */
1242 if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1243 dc390_MsgIn_reject (pACB, pSRB);
1244 else
1245 {
1246 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1247 dc390_MsgIn_set_async (pACB, pSRB);
1248 else
1249 dc390_MsgIn_set_sync (pACB, pSRB);
1250 }
1251
1252 // nothing has to be done
1253 case COMMAND_COMPLETE: break;
1254
1255 // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1256 // scsi command. Thanks, Gerard, for pointing it out.
1257 case SAVE_POINTERS:
1258 pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1259 break;
1260 // The device might want to restart transfer with a RESTORE
1261 case RESTORE_POINTERS:
1262 DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1263 dc390_restore_ptr (pACB, pSRB);
1264 break;
1265
1266 // reject unknown messages
1267 default: dc390_MsgIn_reject (pACB, pSRB);
1268 }
1269
1270 /* Clear counter and MsgIn state */
1271 pSRB->SRBState &= ~SRB_MSGIN;
1272 pACB->MsgLen = 0;
1273 }
1274
1275 *psstatus = SCSI_NOP0;
1276 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1277 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1278 }
1279
1280
1281 static void
1282 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1283 {
1284 unsigned long lval;
1285 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1286
1287 if (pSRB == pACB->pTmpSRB)
1288 {
1289 if (pDCB)
1290 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1291 else
1292 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1293
1294 /* Try to recover - some broken disks react badly to tagged INQUIRY */
1295 if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1296 pSRB = pDCB->pGoingSRB;
1297 pDCB->pActiveSRB = pSRB;
1298 } else {
1299 pSRB->pSRBDCB = pDCB;
1300 dc390_EnableMsgOut_Abort(pACB, pSRB);
1301 if (pDCB)
1302 pDCB->DCBFlag |= ABORT_DEV;
1303 return;
1304 }
1305 }
1306
1307 if( pSRB->SGIndex < pSRB->SGcount )
1308 {
1309 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1310 if( !pSRB->SGToBeXferLen )
1311 {
1312 dc390_start_segment(pSRB);
1313
1314 DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1315 }
1316 lval = pSRB->SGToBeXferLen;
1317 DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1318 DC390_write8 (CtcReg_Low, (u8) lval);
1319 lval >>= 8;
1320 DC390_write8 (CtcReg_Mid, (u8) lval);
1321 lval >>= 8;
1322 DC390_write8 (CtcReg_High, (u8) lval);
1323
1324 DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1325 DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1326
1327 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1328 pSRB->SRBState = SRB_DATA_XFER;
1329
1330 DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1331
1332 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1333 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1334 //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1335 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1336 }
1337 else /* xfer pad */
1338 {
1339 if( pSRB->SGcount )
1340 {
1341 pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1342 pSRB->SRBStatus |= OVER_RUN;
1343 DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1344 }
1345 DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1346 DC390_write8 (CtcReg_Low, 0);
1347 DC390_write8 (CtcReg_Mid, 0);
1348 DC390_write8 (CtcReg_High, 0);
1349
1350 pSRB->SRBState |= SRB_XFERPAD;
1351 DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1352 /*
1353 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1354 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1355 */
1356 }
1357 }
1358
1359
1360 static void
1361 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1362 {
1363 dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1364 }
1365
1366 static void
1367 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1368 {
1369 dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1370 }
1371
1372 static void
1373 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1374 {
1375 struct dc390_dcb* pDCB;
1376 u8 i, cnt;
1377 u8 *ptr;
1378
1379 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1380 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1381 if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1382 {
1383 cnt = (u8) pSRB->pcmd->cmd_len;
1384 ptr = (u8 *) pSRB->pcmd->cmnd;
1385 for(i=0; i < cnt; i++)
1386 DC390_write8 (ScsiFifo, *(ptr++));
1387 }
1388 else
1389 {
1390 DC390_write8 (ScsiFifo, REQUEST_SENSE);
1391 pDCB = pACB->pActiveDCB;
1392 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1393 DC390_write8 (ScsiFifo, 0);
1394 DC390_write8 (ScsiFifo, 0);
1395 DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1396 DC390_write8 (ScsiFifo, 0);
1397 DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1398 }
1399 pSRB->SRBState = SRB_COMMAND;
1400 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1401 }
1402
1403 static void
1404 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1405 {
1406 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1407 pSRB->SRBState = SRB_STATUS;
1408 DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1409 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1410 }
1411
1412 static void
1413 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1414 {
1415 u8 bval, i, cnt;
1416 u8 *ptr;
1417 struct dc390_dcb* pDCB;
1418
1419 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1420 pDCB = pACB->pActiveDCB;
1421 if( !(pSRB->SRBState & SRB_MSGOUT) )
1422 {
1423 cnt = pSRB->MsgCnt;
1424 if( cnt )
1425 {
1426 ptr = (u8 *) pSRB->MsgOutBuf;
1427 for(i=0; i < cnt; i++)
1428 DC390_write8 (ScsiFifo, *(ptr++));
1429 pSRB->MsgCnt = 0;
1430 if( (pDCB->DCBFlag & ABORT_DEV_) &&
1431 (pSRB->MsgOutBuf[0] == ABORT) )
1432 pSRB->SRBState = SRB_ABORT_SENT;
1433 }
1434 else
1435 {
1436 bval = ABORT; /* ??? MSG_NOP */
1437 if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1438 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1439 (pSRB->SRBFlag & AUTO_REQSENSE) )
1440 {
1441 if( pDCB->SyncMode & SYNC_ENABLE )
1442 goto mop1;
1443 }
1444 DC390_write8 (ScsiFifo, bval);
1445 }
1446 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1447 }
1448 else
1449 {
1450 mop1:
1451 printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1452 DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1453 DC390_write8 (ScsiFifo, 3); /* ;length of extended msg */
1454 DC390_write8 (ScsiFifo, EXTENDED_SDTR); /* ; sync nego */
1455 DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1456 if (pDCB->SyncOffset & 0x0f)
1457 DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1458 else
1459 DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1460 pSRB->SRBState |= DO_SYNC_NEGO;
1461 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1462 }
1463 }
1464
1465 static void
1466 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1467 {
1468 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1469 if( !(pSRB->SRBState & SRB_MSGIN) )
1470 {
1471 pSRB->SRBState &= ~SRB_DISCONNECT;
1472 pSRB->SRBState |= SRB_MSGIN;
1473 }
1474 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1475 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1476 }
1477
1478 static void
1479 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1480 {
1481 }
1482
1483 static void
1484 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1485 {
1486 }
1487
1488
1489 static void
1490 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1491 {
1492 u8 bval, i, cnt;
1493 struct dc390_dcb* ptr;
1494
1495 if( !(pDCB->TargetLUN) )
1496 {
1497 if( !pACB->scan_devices )
1498 {
1499 ptr = pACB->pLinkDCB;
1500 cnt = pACB->DCBCnt;
1501 bval = pDCB->TargetID;
1502 for(i=0; i<cnt; i++)
1503 {
1504 if( ptr->TargetID == bval )
1505 {
1506 ptr->SyncPeriod = pDCB->SyncPeriod;
1507 ptr->SyncOffset = pDCB->SyncOffset;
1508 ptr->CtrlR3 = pDCB->CtrlR3;
1509 ptr->CtrlR4 = pDCB->CtrlR4;
1510 ptr->SyncMode = pDCB->SyncMode;
1511 }
1512 ptr = ptr->pNextDCB;
1513 }
1514 }
1515 }
1516 return;
1517 }
1518
1519
1520 static void
1521 dc390_Disconnect( struct dc390_acb* pACB )
1522 {
1523 struct dc390_dcb *pDCB;
1524 struct dc390_srb *pSRB, *psrb;
1525 u8 i, cnt;
1526
1527 DEBUG0(printk(KERN_INFO "DISC,"));
1528
1529 if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1530 pACB->Connected = 0;
1531 pDCB = pACB->pActiveDCB;
1532 if (!pDCB)
1533 {
1534 DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1535 pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1536 mdelay(400);
1537 DC390_read8 (INT_Status); /* Reset Pending INT */
1538 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1539 return;
1540 }
1541 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1542 pSRB = pDCB->pActiveSRB;
1543 pACB->pActiveDCB = NULL;
1544 pSRB->ScsiPhase = SCSI_NOP0;
1545 if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1546 pSRB->SRBState = 0;
1547 else if( pSRB->SRBState & SRB_ABORT_SENT )
1548 {
1549 pDCB->TagMask = 0;
1550 pDCB->DCBFlag = 0;
1551 cnt = pDCB->GoingSRBCnt;
1552 pDCB->GoingSRBCnt = 0;
1553 pSRB = pDCB->pGoingSRB;
1554 for( i=0; i < cnt; i++)
1555 {
1556 psrb = pSRB->pNextSRB;
1557 dc390_Free_insert (pACB, pSRB);
1558 pSRB = psrb;
1559 }
1560 pDCB->pGoingSRB = NULL;
1561 }
1562 else
1563 {
1564 if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1565 !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1566 { /* Selection time out */
1567 pSRB->AdaptStatus = H_SEL_TIMEOUT;
1568 pSRB->TargetStatus = 0;
1569 goto disc1;
1570 }
1571 else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1572 {
1573 disc1:
1574 dc390_freetag (pDCB, pSRB);
1575 pDCB->pActiveSRB = NULL;
1576 pSRB->SRBState = SRB_FREE;
1577 dc390_SRBdone( pACB, pDCB, pSRB);
1578 }
1579 }
1580 pACB->MsgLen = 0;
1581 }
1582
1583
1584 static void
1585 dc390_Reselect( struct dc390_acb* pACB )
1586 {
1587 struct dc390_dcb* pDCB;
1588 struct dc390_srb* pSRB;
1589 u8 id, lun;
1590
1591 DEBUG0(printk(KERN_INFO "RSEL,"));
1592 pACB->Connected = 1;
1593 pDCB = pACB->pActiveDCB;
1594 if( pDCB )
1595 { /* Arbitration lost but Reselection won */
1596 DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1597 pSRB = pDCB->pActiveSRB;
1598 if( !( pACB->scan_devices ) )
1599 {
1600 struct scsi_cmnd *pcmd = pSRB->pcmd;
1601 scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1602 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1603 dc390_Going_remove(pDCB, pSRB);
1604 dc390_Free_insert(pACB, pSRB);
1605 pcmd->scsi_done (pcmd);
1606 DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1607 }
1608 }
1609 /* Get ID */
1610 lun = DC390_read8 (ScsiFifo);
1611 DEBUG0(printk ("Dev %02x,", lun));
1612 if (!(lun & (1 << pACB->pScsiHost->this_id)))
1613 printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1614 else
1615 lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1616 id = 0; while (lun >>= 1) id++;
1617 /* Get LUN */
1618 lun = DC390_read8 (ScsiFifo);
1619 if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1620 lun &= 7;
1621 DEBUG0(printk ("(%02i-%i),", id, lun));
1622 pDCB = dc390_findDCB (pACB, id, lun);
1623 if (!pDCB)
1624 {
1625 printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1626 id, lun);
1627 return;
1628 }
1629 pACB->pActiveDCB = pDCB;
1630 /* TagQ: We expect a message soon, so never mind the exact SRB */
1631 if( pDCB->SyncMode & EN_TAG_QUEUEING )
1632 {
1633 pSRB = pACB->pTmpSRB;
1634 pDCB->pActiveSRB = pSRB;
1635 }
1636 else
1637 {
1638 pSRB = pDCB->pActiveSRB;
1639 if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1640 {
1641 pSRB= pACB->pTmpSRB;
1642 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1643 printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1644 id, lun);
1645 pDCB->pActiveSRB = pSRB;
1646 dc390_EnableMsgOut_Abort ( pACB, pSRB );
1647 }
1648 else
1649 {
1650 if( pDCB->DCBFlag & ABORT_DEV_ )
1651 {
1652 pSRB->SRBState = SRB_ABORT_SENT;
1653 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1654 id, lun);
1655 dc390_EnableMsgOut_Abort( pACB, pSRB );
1656 }
1657 else
1658 pSRB->SRBState = SRB_DATA_XFER;
1659 }
1660 }
1661
1662 DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1663 pSRB->ScsiPhase = SCSI_NOP0;
1664 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1665 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1666 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1667 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1668 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1669 DC390_write8 (CtrlReg4, pDCB->CtrlR4); /* ; Glitch eater */
1670 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); /* ;to release the /ACK signal */
1671 }
1672
1673 static int __inline__
1674 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1675 {
1676 struct scsi_cmnd *pcmd;
1677
1678 pcmd = pSRB->pcmd;
1679
1680 REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1681 pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1682
1683 pSRB->SRBFlag |= AUTO_REQSENSE;
1684 pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1685 pSRB->AdaptStatus = 0;
1686 pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1687
1688 /* We are called from SRBdone, original PCI mapping has been removed
1689 * already, new one is set up from StartSCSI */
1690 pSRB->SGIndex = 0;
1691
1692 pSRB->TotalXferredLen = 0;
1693 pSRB->SGToBeXferLen = 0;
1694 return dc390_StartSCSI(pACB, pDCB, pSRB);
1695 }
1696
1697
1698 static void
1699 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1700 {
1701 u8 status;
1702 struct scsi_cmnd *pcmd;
1703
1704 pcmd = pSRB->pcmd;
1705 /* KG: Moved pci_unmap here */
1706 dc390_pci_unmap(pSRB);
1707
1708 status = pSRB->TargetStatus;
1709
1710 DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1711 pSRB, pcmd->pid));
1712 if(pSRB->SRBFlag & AUTO_REQSENSE)
1713 { /* Last command was a Request Sense */
1714 pSRB->SRBFlag &= ~AUTO_REQSENSE;
1715 pSRB->AdaptStatus = 0;
1716 pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;
1717
1718 //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1719 if (status == SAM_STAT_CHECK_CONDITION)
1720 pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1721 else /* Retry */
1722 {
1723 if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1724 {
1725 /* Don't retry on TEST_UNIT_READY */
1726 pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
1727 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1728 (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1729 } else {
1730 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1731 //pSRB->ScsiCmdLen = (u8) (pSRB->Segment1[0] >> 8);
1732 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1733 pSRB->TotalXferredLen = 0;
1734 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1735 }
1736 }
1737 goto cmd_done;
1738 }
1739 if( status )
1740 {
1741 if (status == SAM_STAT_CHECK_CONDITION)
1742 {
1743 if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1744 SET_RES_DID(pcmd->result, DID_ERROR);
1745 goto cmd_done;
1746 }
1747 return;
1748 }
1749 else if (status == SAM_STAT_TASK_SET_FULL)
1750 {
1751 scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1752 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1753 pSRB->TotalXferredLen = 0;
1754 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1755 }
1756 else if (status == SAM_STAT_BUSY &&
1757 (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1758 pACB->scan_devices)
1759 {
1760 pSRB->AdaptStatus = 0;
1761 pSRB->TargetStatus = status;
1762 pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1763 }
1764 else
1765 { /* Another error */
1766 pSRB->TotalXferredLen = 0;
1767 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1768 goto cmd_done;
1769 }
1770 }
1771 else
1772 { /* Target status == 0 */
1773 status = pSRB->AdaptStatus;
1774 if (status == H_OVER_UNDER_RUN)
1775 {
1776 pSRB->TargetStatus = 0;
1777 SET_RES_DID(pcmd->result,DID_OK);
1778 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1779 }
1780 else if (status == H_SEL_TIMEOUT)
1781 {
1782 pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
1783 /* Devices are removed below ... */
1784 }
1785 else if( pSRB->SRBStatus & PARITY_ERROR)
1786 {
1787 //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1788 SET_RES_DID(pcmd->result,DID_PARITY);
1789 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1790 }
1791 else /* No error */
1792 {
1793 pSRB->AdaptStatus = 0;
1794 pSRB->TargetStatus = 0;
1795 SET_RES_DID(pcmd->result,DID_OK);
1796 }
1797 }
1798
1799 cmd_done:
1800 scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
1801
1802 dc390_Going_remove (pDCB, pSRB);
1803 /* Add to free list */
1804 dc390_Free_insert (pACB, pSRB);
1805
1806 DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->pid));
1807 pcmd->scsi_done (pcmd);
1808
1809 return;
1810 }
1811
1812
1813 /* Remove all SRBs from Going list and inform midlevel */
1814 static void
1815 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1816 {
1817 struct dc390_dcb *pDCB, *pdcb;
1818 struct dc390_srb *psrb, *psrb2;
1819 int i;
1820 struct scsi_cmnd *pcmd;
1821
1822 pDCB = pACB->pLinkDCB;
1823 pdcb = pDCB;
1824 if (! pdcb) return;
1825 do
1826 {
1827 psrb = pdcb->pGoingSRB;
1828 for (i = 0; i < pdcb->GoingSRBCnt; i++)
1829 {
1830 psrb2 = psrb->pNextSRB;
1831 pcmd = psrb->pcmd;
1832 dc390_Free_insert (pACB, psrb);
1833 psrb = psrb2;
1834 }
1835 pdcb->GoingSRBCnt = 0;
1836 pdcb->pGoingSRB = NULL;
1837 pdcb->TagMask = 0;
1838 pdcb = pdcb->pNextDCB;
1839 } while( pdcb != pDCB );
1840 }
1841
1842
1843 static void
1844 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1845 {
1846 //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1847 //udelay (250);
1848 //DC390_write8 (ScsiCmd, NOP_CMD);
1849
1850 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1851 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1852 DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1853 pACB->Connected = 0;
1854
1855 return;
1856 }
1857
1858 static void
1859 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1860 {
1861 printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1862 //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1863
1864 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1865 /* Unlock before ? */
1866 /* delay half a second */
1867 udelay (1000);
1868 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1869 pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1870 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1871 pACB->Connected = 0;
1872
1873 if( pACB->ACBFlag & RESET_DEV )
1874 pACB->ACBFlag |= RESET_DONE;
1875 else
1876 { /* Reset was issued by sb else */
1877 pACB->ACBFlag |= RESET_DETECT;
1878
1879 dc390_ResetDevParam( pACB );
1880 dc390_DoingSRB_Done( pACB, NULL);
1881 //dc390_RecoverSRB( pACB );
1882 pACB->pActiveDCB = NULL;
1883 pACB->ACBFlag = 0;
1884 }
1885 return;
1886 }
1887
1888 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1889 void (*done)(struct scsi_cmnd *))
1890 {
1891 struct scsi_device *sdev = cmd->device;
1892 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1893 struct dc390_dcb *dcb = sdev->hostdata;
1894 struct dc390_srb *srb;
1895
1896 if (sdev->queue_depth <= dcb->GoingSRBCnt)
1897 goto device_busy;
1898 if (acb->pActiveDCB)
1899 goto host_busy;
1900 if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1901 goto host_busy;
1902
1903 srb = acb->pFreeSRB;
1904 if (unlikely(srb == NULL))
1905 goto host_busy;
1906
1907 cmd->scsi_done = done;
1908 cmd->result = 0;
1909 acb->Cmds++;
1910
1911 acb->pFreeSRB = srb->pNextSRB;
1912 srb->pNextSRB = NULL;
1913
1914 srb->pSRBDCB = dcb;
1915 srb->pcmd = cmd;
1916 cmd->host_scribble = (char *)srb;
1917
1918 srb->SGIndex = 0;
1919 srb->AdaptStatus = 0;
1920 srb->TargetStatus = 0;
1921 srb->MsgCnt = 0;
1922
1923 srb->SRBStatus = 0;
1924 srb->SRBFlag = 0;
1925 srb->SRBState = 0;
1926 srb->TotalXferredLen = 0;
1927 srb->SGBusAddr = 0;
1928 srb->SGToBeXferLen = 0;
1929 srb->ScsiPhase = 0;
1930 srb->EndMessage = 0;
1931 srb->TagNumber = SCSI_NO_TAG;
1932
1933 if (dc390_StartSCSI(acb, dcb, srb)) {
1934 dc390_Free_insert(acb, srb);
1935 goto host_busy;
1936 }
1937
1938 dc390_Going_append(dcb, srb);
1939
1940 return 0;
1941
1942 host_busy:
1943 return SCSI_MLQUEUE_HOST_BUSY;
1944
1945 device_busy:
1946 return SCSI_MLQUEUE_DEVICE_BUSY;
1947 }
1948
1949 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1950 {
1951 struct pci_dev *pdev;
1952 u16 pstat;
1953
1954 if (!pDCB) pDCB = pACB->pActiveDCB;
1955 if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1956
1957 if (pSRB)
1958 {
1959 printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1960 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1961 pSRB->ScsiPhase);
1962 printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1963 }
1964 printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1965 printk ("DC390: Register dump: SCSI block:\n");
1966 printk ("DC390: XferCnt Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1967 printk ("DC390: %06x %02x %02x %02x",
1968 DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1969 DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1970 printk (" %02x %02x %02x %02x %02x %02x\n",
1971 DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1972 DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1973 DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1974 if (DC390_read8(Current_Fifo) & 0x1f)
1975 {
1976 printk ("DC390: FIFO:");
1977 while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1978 printk ("\n");
1979 }
1980 printk ("DC390: Register dump: DMA engine:\n");
1981 printk ("DC390: Cmd STrCnt SBusA WrkBC WrkAC Stat SBusCtrl\n");
1982 printk ("DC390: %02x %08x %08x %08x %08x %02x %08x\n",
1983 DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1984 DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1985 DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1986 DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1987
1988 pdev = pACB->pdev;
1989 pci_read_config_word(pdev, PCI_STATUS, &pstat);
1990 printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
1991 printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
1992 }
1993
1994
1995 static int DC390_abort(struct scsi_cmnd *cmd)
1996 {
1997 struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
1998 struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
1999
2000 scmd_printk(KERN_WARNING, cmd,
2001 "DC390: Abort command (pid %li)\n", cmd->pid);
2002
2003 /* abort() is too stupid for already sent commands at the moment.
2004 * If it's called we are in trouble anyway, so let's dump some info
2005 * into the syslog at least. (KG, 98/08/20,99/06/20) */
2006 dc390_dumpinfo(pACB, pDCB, NULL);
2007
2008 pDCB->DCBFlag |= ABORT_DEV_;
2009 printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->pid);
2010
2011 return FAILED;
2012 }
2013
2014
2015 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2016 {
2017 struct dc390_dcb *pDCB, *pdcb;
2018
2019 pDCB = pACB->pLinkDCB;
2020 if (! pDCB) return;
2021 pdcb = pDCB;
2022 do
2023 {
2024 pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2025 pDCB->SyncPeriod = 0;
2026 pDCB->SyncOffset = 0;
2027 pDCB->TagMask = 0;
2028 pDCB->CtrlR3 = FAST_CLK;
2029 pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2030 pDCB->CtrlR4 |= pACB->glitch_cfg;
2031 pDCB = pDCB->pNextDCB;
2032 }
2033 while( pdcb != pDCB );
2034 pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2035
2036 }
2037
2038 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2039 {
2040 struct dc390_acb* pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2041 u8 bval;
2042
2043 spin_lock_irq(cmd->device->host->host_lock);
2044
2045 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2046 DC390_write8(CtrlReg1, bval); /* disable IRQ on bus reset */
2047
2048 pACB->ACBFlag |= RESET_DEV;
2049 dc390_ResetSCSIBus(pACB);
2050
2051 dc390_ResetDevParam(pACB);
2052 mdelay(1);
2053 pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2054 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2055
2056 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2057 DC390_read8(INT_Status); /* Reset Pending INT */
2058
2059 dc390_DoingSRB_Done(pACB, cmd);
2060
2061 pACB->pActiveDCB = NULL;
2062 pACB->ACBFlag = 0;
2063
2064 bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2065 DC390_write8(CtrlReg1, bval); /* re-enable interrupt */
2066
2067 spin_unlock_irq(cmd->device->host->host_lock);
2068
2069 return SUCCESS;
2070 }
2071
2072 /**
2073 * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2074 * scsi device that we need to deal with.
2075 *
2076 * @scsi_device: The new scsi device that we need to handle.
2077 */
2078 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2079 {
2080 struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2081 struct dc390_dcb *pDCB, *pDCB2 = NULL;
2082 uint id = scsi_device->id;
2083 uint lun = scsi_device->lun;
2084
2085 pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2086 if (!pDCB)
2087 return -ENOMEM;
2088
2089 if (!pACB->DCBCnt++) {
2090 pACB->pLinkDCB = pDCB;
2091 pACB->pDCBRunRobin = pDCB;
2092 } else {
2093 pACB->pLastDCB->pNextDCB = pDCB;
2094 }
2095
2096 pDCB->pNextDCB = pACB->pLinkDCB;
2097 pACB->pLastDCB = pDCB;
2098
2099 pDCB->pDCBACB = pACB;
2100 pDCB->TargetID = id;
2101 pDCB->TargetLUN = lun;
2102
2103 /*
2104 * Some values are for all LUNs: Copy them
2105 * In a clean way: We would have an own structure for a SCSI-ID
2106 */
2107 if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2108 pDCB->DevMode = pDCB2->DevMode;
2109 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2110 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2111 pDCB->SyncOffset = pDCB2->SyncOffset;
2112 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2113
2114 pDCB->CtrlR3 = pDCB2->CtrlR3;
2115 pDCB->CtrlR4 = pDCB2->CtrlR4;
2116 } else {
2117 u8 index = pACB->AdapterIndex;
2118 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2119
2120 pDCB->DevMode = prom->EE_MODE1;
2121 pDCB->NegoPeriod =
2122 (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2123 pDCB->CtrlR3 = FAST_CLK;
2124 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2125 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2126 pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2127 }
2128
2129 if (pDCB->DevMode & SYNC_NEGO_)
2130 pDCB->SyncMode |= SYNC_ENABLE;
2131 else {
2132 pDCB->SyncMode = 0;
2133 pDCB->SyncOffset &= ~0x0f;
2134 }
2135
2136 pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2137 if (pDCB->DevMode & PARITY_CHK_)
2138 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2139
2140 pACB->scan_devices = 1;
2141 scsi_device->hostdata = pDCB;
2142 return 0;
2143 }
2144
2145 /**
2146 * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2147 * device that is going away.
2148 *
2149 * @scsi_device: The scsi device that we need to remove.
2150 */
2151 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2152 {
2153 struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2154 struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2155 struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2156
2157 pACB->scan_devices = 0;
2158
2159 BUG_ON(pDCB->GoingSRBCnt > 1);
2160
2161 if (pDCB == pACB->pLinkDCB) {
2162 if (pACB->pLastDCB == pDCB) {
2163 pDCB->pNextDCB = NULL;
2164 pACB->pLastDCB = NULL;
2165 }
2166 pACB->pLinkDCB = pDCB->pNextDCB;
2167 } else {
2168 while (pPrevDCB->pNextDCB != pDCB)
2169 pPrevDCB = pPrevDCB->pNextDCB;
2170 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2171 if (pDCB == pACB->pLastDCB)
2172 pACB->pLastDCB = pPrevDCB;
2173 }
2174
2175 if (pDCB == pACB->pActiveDCB)
2176 pACB->pActiveDCB = NULL;
2177 if (pDCB == pACB->pLinkDCB)
2178 pACB->pLinkDCB = pDCB->pNextDCB;
2179 if (pDCB == pACB->pDCBRunRobin)
2180 pACB->pDCBRunRobin = pDCB->pNextDCB;
2181 kfree(pDCB);
2182
2183 pACB->DCBCnt--;
2184 }
2185
2186 static int dc390_slave_configure(struct scsi_device *sdev)
2187 {
2188 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2189 struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2190
2191 acb->scan_devices = 0;
2192 if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2193 dcb->SyncMode |= EN_TAG_QUEUEING;
2194 scsi_activate_tcq(sdev, acb->TagMaxNum);
2195 }
2196
2197 return 0;
2198 }
2199
2200 static struct scsi_host_template driver_template = {
2201 .module = THIS_MODULE,
2202 .proc_name = "tmscsim",
2203 .name = DC390_BANNER " V" DC390_VERSION,
2204 .slave_alloc = dc390_slave_alloc,
2205 .slave_configure = dc390_slave_configure,
2206 .slave_destroy = dc390_slave_destroy,
2207 .queuecommand = DC390_queuecommand,
2208 .eh_abort_handler = DC390_abort,
2209 .eh_bus_reset_handler = DC390_bus_reset,
2210 .can_queue = 1,
2211 .this_id = 7,
2212 .sg_tablesize = SG_ALL,
2213 .cmd_per_lun = 1,
2214 .use_clustering = ENABLE_CLUSTERING,
2215 .max_sectors = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2216 };
2217
2218 /***********************************************************************
2219 * Functions for access to DC390 EEPROM
2220 * and some to emulate it
2221 *
2222 **********************************************************************/
2223
2224 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2225 {
2226 u8 carryFlag = 1, j = 0x80, bval;
2227 int i;
2228
2229 for (i = 0; i < 9; i++) {
2230 if (carryFlag) {
2231 pci_write_config_byte(pdev, 0x80, 0x40);
2232 bval = 0xc0;
2233 } else
2234 bval = 0x80;
2235
2236 udelay(160);
2237 pci_write_config_byte(pdev, 0x80, bval);
2238 udelay(160);
2239 pci_write_config_byte(pdev, 0x80, 0);
2240 udelay(160);
2241
2242 carryFlag = (cmd & j) ? 1 : 0;
2243 j >>= 1;
2244 }
2245 }
2246
2247 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2248 {
2249 int i;
2250 u16 wval = 0;
2251 u8 bval;
2252
2253 for (i = 0; i < 16; i++) {
2254 wval <<= 1;
2255
2256 pci_write_config_byte(pdev, 0x80, 0x80);
2257 udelay(160);
2258 pci_write_config_byte(pdev, 0x80, 0x40);
2259 udelay(160);
2260 pci_read_config_byte(pdev, 0x00, &bval);
2261
2262 if (bval == 0x22)
2263 wval |= 1;
2264 }
2265
2266 return wval;
2267 }
2268
2269 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2270 {
2271 u8 cmd = EEPROM_READ, i;
2272
2273 for (i = 0; i < 0x40; i++) {
2274 pci_write_config_byte(pdev, 0xc0, 0);
2275 udelay(160);
2276
2277 dc390_eeprom_prepare_read(pdev, cmd++);
2278 *ptr++ = dc390_eeprom_get_data(pdev);
2279
2280 pci_write_config_byte(pdev, 0x80, 0);
2281 pci_write_config_byte(pdev, 0x80, 0);
2282 udelay(160);
2283 }
2284 }
2285
2286 /* Override EEprom values with explicitly set values */
2287 static void __devinit dc390_eeprom_override(u8 index)
2288 {
2289 u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2290
2291 /* Adapter Settings */
2292 if (tmscsim[0] != -2)
2293 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2294 if (tmscsim[3] != -2)
2295 ptr[EE_MODE2] = (u8)tmscsim[3];
2296 if (tmscsim[5] != -2)
2297 ptr[EE_DELAY] = tmscsim[5]; /* Reset delay */
2298 if (tmscsim[4] != -2)
2299 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4]; /* Tagged Cmds */
2300
2301 /* Device Settings */
2302 for (id = 0; id < MAX_SCSI_ID; id++) {
2303 if (tmscsim[2] != -2)
2304 ptr[id << 2] = (u8)tmscsim[2]; /* EE_MODE1 */
2305 if (tmscsim[1] != -2)
2306 ptr[(id << 2) + 1] = (u8)tmscsim[1]; /* EE_Speed */
2307 }
2308 }
2309
2310 static int __devinitdata tmscsim_def[] = {
2311 7,
2312 0 /* 10MHz */,
2313 PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2314 MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2315 3 /* 16 Tags per LUN */,
2316 1 /* s delay after Reset */,
2317 };
2318
2319 /* Copy defaults over set values where missing */
2320 static void __devinit dc390_fill_with_defaults (void)
2321 {
2322 int i;
2323
2324 for (i = 0; i < 6; i++) {
2325 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2326 tmscsim[i] = tmscsim_def[i];
2327 }
2328
2329 /* Sanity checks */
2330 if (tmscsim[0] > 7)
2331 tmscsim[0] = 7;
2332 if (tmscsim[1] > 7)
2333 tmscsim[1] = 4;
2334 if (tmscsim[4] > 5)
2335 tmscsim[4] = 4;
2336 if (tmscsim[5] > 180)
2337 tmscsim[5] = 180;
2338 }
2339
2340 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2341 {
2342 u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2343 u8 EEbuf[128];
2344 u16 *ptr = (u16 *)EEbuf, wval = 0;
2345 int i;
2346
2347 dc390_read_eeprom(pdev, ptr);
2348 memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2349 memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2350 &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2351
2352 dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2353
2354 for (i = 0; i < 0x40; i++, ptr++)
2355 wval += *ptr;
2356
2357 /* no Tekram EEprom found */
2358 if (wval != 0x1234) {
2359 int speed;
2360
2361 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2362
2363 /*
2364 * XXX(hch): bogus, because we might have tekram and
2365 * non-tekram hbas in a single machine.
2366 */
2367 dc390_fill_with_defaults();
2368
2369 speed = dc390_clock_speed[tmscsim[1]];
2370 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2371 "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2372 tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2373 (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2374 }
2375 }
2376
2377 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2378 {
2379 struct Scsi_Host *shost = pACB->pScsiHost;
2380 u8 dstate;
2381
2382 /* Disable SCSI bus reset interrupt */
2383 DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2384
2385 if (pACB->Gmode2 & RST_SCSI_BUS) {
2386 dc390_ResetSCSIBus(pACB);
2387 udelay(1000);
2388 shost->last_reset = jiffies + HZ/2 +
2389 HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2390 }
2391
2392 pACB->ACBFlag = 0;
2393
2394 /* Reset Pending INT */
2395 DC390_read8(INT_Status);
2396
2397 /* 250ms selection timeout */
2398 DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2399
2400 /* Conversion factor = 0 , 40MHz clock */
2401 DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2402
2403 /* NOP cmd - clear command register */
2404 DC390_write8(ScsiCmd, NOP_CMD);
2405
2406 /* Enable Feature and SCSI-2 */
2407 DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2408
2409 /* Fast clock */
2410 DC390_write8(CtrlReg3, FAST_CLK);
2411
2412 /* Negation */
2413 DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2414 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2415 NEGATE_REQACKDATA : 0);
2416
2417 /* Clear Transfer Count High: ID */
2418 DC390_write8(CtcReg_High, 0);
2419 DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2420 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2421 DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2422
2423 dstate = DC390_read8(DMA_Status);
2424 DC390_write8(DMA_Status, dstate);
2425 }
2426
2427 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2428 const struct pci_device_id *id)
2429 {
2430 struct dc390_acb *pACB;
2431 struct Scsi_Host *shost;
2432 unsigned long io_port;
2433 int error = -ENODEV, i;
2434
2435 if (pci_enable_device(pdev))
2436 goto out;
2437
2438 pci_set_master(pdev);
2439
2440 error = -ENOMEM;
2441 if (disable_clustering)
2442 driver_template.use_clustering = DISABLE_CLUSTERING;
2443 shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2444 if (!shost)
2445 goto out_disable_device;
2446
2447 pACB = (struct dc390_acb *)shost->hostdata;
2448 memset(pACB, 0, sizeof(struct dc390_acb));
2449
2450 dc390_check_eeprom(pdev, dc390_adapterCnt);
2451 dc390_eeprom_override(dc390_adapterCnt);
2452
2453 io_port = pci_resource_start(pdev, 0);
2454
2455 shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2456 shost->io_port = io_port;
2457 shost->n_io_port = 0x80;
2458 shost->irq = pdev->irq;
2459 shost->base = io_port;
2460 shost->unique_id = io_port;
2461 shost->last_reset = jiffies;
2462
2463 pACB->pScsiHost = shost;
2464 pACB->IOPortBase = (u16) io_port;
2465 pACB->IRQLevel = pdev->irq;
2466
2467 shost->max_id = 8;
2468
2469 if (shost->max_id - 1 ==
2470 dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2471 shost->max_id--;
2472
2473 if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2474 shost->max_lun = 8;
2475 else
2476 shost->max_lun = 1;
2477
2478 pACB->pFreeSRB = pACB->SRB_array;
2479 pACB->SRBCount = MAX_SRB_CNT;
2480 pACB->AdapterIndex = dc390_adapterCnt;
2481 pACB->TagMaxNum =
2482 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2483 pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2484
2485 for (i = 0; i < pACB->SRBCount-1; i++)
2486 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2487 pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2488 pACB->pTmpSRB = &pACB->TmpSRB;
2489
2490 pACB->sel_timeout = SEL_TIMEOUT;
2491 pACB->glitch_cfg = EATER_25NS;
2492 pACB->pdev = pdev;
2493
2494 if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2495 printk(KERN_ERR "DC390: register IO ports error!\n");
2496 goto out_host_put;
2497 }
2498
2499 /* Reset Pending INT */
2500 DC390_read8_(INT_Status, io_port);
2501
2502 if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2503 "tmscsim", pACB)) {
2504 printk(KERN_ERR "DC390: register IRQ error!\n");
2505 goto out_release_region;
2506 }
2507
2508 dc390_init_hw(pACB, dc390_adapterCnt);
2509
2510 dc390_adapterCnt++;
2511
2512 pci_set_drvdata(pdev, shost);
2513
2514 error = scsi_add_host(shost, &pdev->dev);
2515 if (error)
2516 goto out_free_irq;
2517 scsi_scan_host(shost);
2518 return 0;
2519
2520 out_free_irq:
2521 free_irq(pdev->irq, pACB);
2522 out_release_region:
2523 release_region(io_port, shost->n_io_port);
2524 out_host_put:
2525 scsi_host_put(shost);
2526 out_disable_device:
2527 pci_disable_device(pdev);
2528 out:
2529 return error;
2530 }
2531
2532 /**
2533 * dc390_remove_one - Called to remove a single instance of the adapter.
2534 *
2535 * @dev: The PCI device to remove.
2536 */
2537 static void __devexit dc390_remove_one(struct pci_dev *dev)
2538 {
2539 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2540 unsigned long iflags;
2541 struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2542 u8 bval;
2543
2544 scsi_remove_host(scsi_host);
2545
2546 spin_lock_irqsave(scsi_host->host_lock, iflags);
2547 pACB->ACBFlag = RESET_DEV;
2548 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2549 DC390_write8 (CtrlReg1, bval); /* disable interrupt */
2550 if (pACB->Gmode2 & RST_SCSI_BUS)
2551 dc390_ResetSCSIBus(pACB);
2552 spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2553
2554 free_irq(scsi_host->irq, pACB);
2555 release_region(scsi_host->io_port, scsi_host->n_io_port);
2556
2557 pci_disable_device(dev);
2558 scsi_host_put(scsi_host);
2559 pci_set_drvdata(dev, NULL);
2560 }
2561
2562 static struct pci_device_id tmscsim_pci_tbl[] = {
2563 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2564 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2565 { }
2566 };
2567 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2568
2569 static struct pci_driver dc390_driver = {
2570 .name = "tmscsim",
2571 .id_table = tmscsim_pci_tbl,
2572 .probe = dc390_probe_one,
2573 .remove = __devexit_p(dc390_remove_one),
2574 };
2575
2576 static int __init dc390_module_init(void)
2577 {
2578 if (!disable_clustering)
2579 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
2580 "\twith \"disable_clustering=1\" and report to maintainers\n");
2581
2582 if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2583 tmscsim[0] = 7;
2584 tmscsim[1] = 4;
2585 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2586 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2587 tmscsim[4] = 2;
2588 tmscsim[5] = 10;
2589 printk (KERN_INFO "DC390: Using safe settings.\n");
2590 }
2591
2592 return pci_register_driver(&dc390_driver);
2593 }
2594
2595 static void __exit dc390_module_exit(void)
2596 {
2597 pci_unregister_driver(&dc390_driver);
2598 }
2599
2600 module_init(dc390_module_init);
2601 module_exit(dc390_module_exit);
2602
2603 #ifndef MODULE
2604 static int __init dc390_setup (char *str)
2605 {
2606 int ints[8],i, im;
2607
2608 get_options(str, ARRAY_SIZE(ints), ints);
2609 im = ints[0];
2610
2611 if (im > 6) {
2612 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2613 im = 6;
2614 }
2615
2616 for (i = 0; i < im; i++)
2617 tmscsim[i] = ints[i+1];
2618 /* dc390_checkparams (); */
2619 return 1;
2620 }
2621
2622 __setup("tmscsim=", dc390_setup);
2623 #endif
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