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scsi: don't set tagging state from scsi_adjust_queue_depth
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / tmscsim.c
1 /************************************************************************
2 * FILE NAME : TMSCSIM.C *
3 * BY : C.L. Huang, ching@tekram.com.tw *
4 * Description: Device Driver for Tekram DC-390(T) PCI SCSI *
5 * Bus Master Host Adapter *
6 * (C)Copyright 1995-1996 Tekram Technology Co., Ltd. *
7 ************************************************************************
8 * (C) Copyright: put under GNU GPL in 10/96 *
9 * (see Documentation/scsi/tmscsim.txt) *
10 ************************************************************************
11 * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $ *
12 * Enhancements and bugfixes by *
13 * Kurt Garloff <kurt@garloff.de> <garloff@suse.de> *
14 ************************************************************************
15 * HISTORY: *
16 * *
17 * REV# DATE NAME DESCRIPTION *
18 * 1.00 96/04/24 CLH First release *
19 * 1.01 96/06/12 CLH Fixed bug of Media Change for Removable *
20 * Device, scan all LUN. Support Pre2.0.10 *
21 * 1.02 96/06/18 CLH Fixed bug of Command timeout ... *
22 * 1.03 96/09/25 KG Added tmscsim_proc_info() *
23 * 1.04 96/10/11 CLH Updating for support KV 2.0.x *
24 * 1.05 96/10/18 KG Fixed bug in DC390_abort(null ptr deref)*
25 * 1.06 96/10/25 KG Fixed module support *
26 * 1.07 96/11/09 KG Fixed tmscsim_proc_info() *
27 * 1.08 96/11/18 KG Fixed null ptr in DC390_Disconnect() *
28 * 1.09 96/11/30 KG Added register the allocated IO space *
29 * 1.10 96/12/05 CLH Modified tmscsim_proc_info(), and reset *
30 * pending interrupt in DC390_detect() *
31 * 1.11 97/02/05 KG/CLH Fixeds problem with partitions greater *
32 * than 1GB *
33 * 1.12 98/02/15 MJ Rewritten PCI probing *
34 * 1.13 98/04/08 KG Support for non DC390, __initfunc decls,*
35 * changed max devs from 10 to 16 *
36 * 1.14a 98/05/05 KG Dynamic DCB allocation, add-single-dev *
37 * for LUNs if LUN_SCAN (BIOS) not set *
38 * runtime config using /proc interface *
39 * 1.14b 98/05/06 KG eliminated cli (); sti (); spinlocks *
40 * 1.14c 98/05/07 KG 2.0.x compatibility *
41 * 1.20a 98/05/07 KG changed names of funcs to be consistent *
42 * DC390_ (entry points), dc390_ (internal)*
43 * reworked locking *
44 * 1.20b 98/05/12 KG bugs: version, kfree, _ctmp *
45 * debug output *
46 * 1.20c 98/05/12 KG bugs: kfree, parsing, EEpromDefaults *
47 * 1.20d 98/05/14 KG bugs: list linkage, clear flag after *
48 * reset on startup, code cleanup *
49 * 1.20e 98/05/15 KG spinlock comments, name space cleanup *
50 * pLastDCB now part of ACB structure *
51 * added stats, timeout for 2.1, TagQ bug *
52 * RESET and INQUIRY interface commands *
53 * 1.20f 98/05/18 KG spinlocks fixes, max_lun fix, free DCBs *
54 * for missing LUNs, pending int *
55 * 1.20g 98/05/19 KG Clean up: Avoid short *
56 * 1.20h 98/05/21 KG Remove AdaptSCSIID, max_lun ... *
57 * 1.20i 98/05/21 KG Aiiie: Bug with TagQMask *
58 * 1.20j 98/05/24 KG Handle STAT_BUSY, handle pACB->pLinkDCB *
59 * == 0 in remove_dev and DoingSRB_Done *
60 * 1.20k 98/05/25 KG DMA_INT (experimental) *
61 * 1.20l 98/05/27 KG remove DMA_INT; DMA_IDLE cmds added; *
62 * 1.20m 98/06/10 KG glitch configurable; made some global *
63 * vars part of ACB; use DC390_readX *
64 * 1.20n 98/06/11 KG startup params *
65 * 1.20o 98/06/15 KG added TagMaxNum to boot/module params *
66 * Device Nr -> Idx, TagMaxNum power of 2 *
67 * 1.20p 98/06/17 KG Docu updates. Reset depends on settings *
68 * pci_set_master added; 2.0.xx: pcibios_* *
69 * used instead of MechNum things ... *
70 * 1.20q 98/06/23 KG Changed defaults. Added debug code for *
71 * removable media and fixed it. TagMaxNum *
72 * fixed for DC390. Locking: ACB, DRV for *
73 * better IRQ sharing. Spelling: Queueing *
74 * Parsing and glitch_cfg changes. Display *
75 * real SyncSpeed value. Made DisConn *
76 * functional (!) *
77 * 1.20r 98/06/30 KG Debug macros, allow disabling DsCn, set *
78 * BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module *
79 * param -1 fixed. *
80 * 1.20s 98/08/20 KG Debug info on abort(), try to check PCI,*
81 * phys_to_bus instead of phys_to_virt, *
82 * fixed sel. process, fixed locking, *
83 * added MODULE_XXX infos, changed IRQ *
84 * request flags, disable DMA_INT *
85 * 1.20t 98/09/07 KG TagQ report fixed; Write Erase DMA Stat;*
86 * initfunc -> __init; better abort; *
87 * Timeout for XFER_DONE & BLAST_COMPLETE; *
88 * Allow up to 33 commands being processed *
89 * 2.0a 98/10/14 KG Max Cmnds back to 17. DMA_Stat clearing *
90 * all flags. Clear within while() loops *
91 * in DataIn_0/Out_0. Null ptr in dumpinfo *
92 * for pSRB==0. Better locking during init.*
93 * bios_param() now respects part. table. *
94 * 2.0b 98/10/24 KG Docu fixes. Timeout Msg in DMA Blast. *
95 * Disallow illegal idx in INQUIRY/REMOVE *
96 * 2.0c 98/11/19 KG Cleaned up detect/init for SMP boxes, *
97 * Write Erase DMA (1.20t) caused problems *
98 * 2.0d 98/12/25 KG Christmas release ;-) Message handling *
99 * completely reworked. Handle target ini- *
100 * tiated SDTR correctly. *
101 * 2.0d1 99/01/25 KG Try to handle RESTORE_PTR *
102 * 2.0d2 99/02/08 KG Check for failure of kmalloc, correct *
103 * inclusion of scsicam.h, DelayReset *
104 * 2.0d3 99/05/31 KG DRIVER_OK -> DID_OK, DID_NO_CONNECT, *
105 * detect Target mode and warn. *
106 * pcmd->result handling cleaned up. *
107 * 2.0d4 99/06/01 KG Cleaned selection process. Found bug *
108 * which prevented more than 16 tags. Now: *
109 * 24. SDTR cleanup. Cleaner multi-LUN *
110 * handling. Don't modify ControlRegs/FIFO *
111 * when connected. *
112 * 2.0d5 99/06/01 KG Clear DevID, Fix INQUIRY after cfg chg. *
113 * 2.0d6 99/06/02 KG Added ADD special command to allow cfg. *
114 * before detection. Reset SYNC_NEGO_DONE *
115 * after a bus reset. *
116 * 2.0d7 99/06/03 KG Fixed bugs wrt add,remove commands *
117 * 2.0d8 99/06/04 KG Removed copying of cmnd into CmdBlock. *
118 * Fixed Oops in _release(). *
119 * 2.0d9 99/06/06 KG Also tag queue INQUIRY, T_U_R, ... *
120 * Allow arb. no. of Tagged Cmnds. Max 32 *
121 * 2.0d1099/06/20 KG TagMaxNo changes now honoured! Queueing *
122 * clearified (renamed ..) TagMask handling*
123 * cleaned. *
124 * 2.0d1199/06/28 KG cmd->result now identical to 2.0d2 *
125 * 2.0d1299/07/04 KG Changed order of processing in IRQ *
126 * 2.0d1399/07/05 KG Don't update DCB fields if removed *
127 * 2.0d1499/07/05 KG remove_dev: Move kfree() to the end *
128 * 2.0d1599/07/12 KG use_new_eh_code: 0, ULONG -> UINT where *
129 * appropriate *
130 * 2.0d1699/07/13 KG Reenable StartSCSI interrupt, Retry msg *
131 * 2.0d1799/07/15 KG Remove debug msg. Disable recfg. when *
132 * there are queued cmnds *
133 * 2.0d1899/07/18 KG Selection timeout: Don't requeue *
134 * 2.0d1999/07/18 KG Abort: Only call scsi_done if dequeued *
135 * 2.0d2099/07/19 KG Rst_Detect: DoingSRB_Done *
136 * 2.0d2199/08/15 KG dev_id for request/free_irq, cmnd[0] for*
137 * RETRY, SRBdone does DID_ABORT for the *
138 * cmd passed by DC390_reset() *
139 * 2.0d2299/08/25 KG dev_id fixed. can_queue: 42 *
140 * 2.0d2399/08/25 KG Removed some debugging code. dev_id *
141 * now is set to pACB. Use u8,u16,u32. *
142 * 2.0d2499/11/14 KG Unreg. I/O if failed IRQ alloc. Call *
143 * done () w/ DID_BAD_TARGET in case of *
144 * missing DCB. We are old EH!! *
145 * 2.0d2500/01/15 KG 2.3.3x compat from Andreas Schultz *
146 * set unique_id. Disable RETRY message. *
147 * 2.0d2600/01/29 KG Go to new EH. *
148 * 2.0d2700/01/31 KG ... but maintain 2.0 compat. *
149 * and fix DCB freeing *
150 * 2.0d2800/02/14 KG Queue statistics fixed, dump special cmd*
151 * Waiting_Timer for failed StartSCSI *
152 * New EH: Don't return cmnds to ML on RST *
153 * Use old EH (don't have new EH fns yet) *
154 * Reset: Unlock, but refuse to queue *
155 * 2.3 __setup function *
156 * 2.0e 00/05/22 KG Return residual for 2.3 *
157 * 2.0e1 00/05/25 KG Compile fixes for 2.3.99 *
158 * 2.0e2 00/05/27 KG Jeff Garzik's pci_enable_device() *
159 * 2.0e3 00/09/29 KG Some 2.4 changes. Don't try Sync Nego *
160 * before INQUIRY has reported ability. *
161 * Recognise INQUIRY as scanning command. *
162 * 2.0e4 00/10/13 KG Allow compilation into 2.4 kernel *
163 * 2.0e5 00/11/17 KG Store Inq.flags in DCB *
164 * 2.0e6 00/11/22 KG 2.4 init function (Thx to O.Schumann) *
165 * 2.4 PCI device table (Thx to A.Richter) *
166 * 2.0e7 00/11/28 KG Allow overriding of BIOS settings *
167 * 2.0f 00/12/20 KG Handle failed INQUIRYs during scan *
168 * 2.1a 03/11/29 GL, KG Initial fixing for 2.6. Convert to *
169 * use the current PCI-mapping API, update *
170 * command-queuing. *
171 * 2.1b 04/04/13 GL Fix for 64-bit platforms *
172 * 2.1b1 04/01/31 GL (applied 05.04) Remove internal *
173 * command-queuing. *
174 * 2.1b2 04/02/01 CH (applied 05.04) Fix error-handling *
175 * 2.1c 04/05/23 GL Update to use the new pci_driver API, *
176 * some scsi EH updates, more cleanup. *
177 * 2.1d 04/05/27 GL Moved setting of scan_devices to *
178 * slave_alloc/_configure/_destroy, as *
179 * suggested by CH. *
180 ***********************************************************************/
181
182 /* DEBUG options */
183 //#define DC390_DEBUG0
184 //#define DC390_DEBUG1
185 //#define DC390_DCBDEBUG
186 //#define DC390_PARSEDEBUG
187 //#define DC390_REMOVABLEDEBUG
188 //#define DC390_LOCKDEBUG
189
190 //#define NOP do{}while(0)
191 #define C_NOP
192
193 /* Debug definitions */
194 #ifdef DC390_DEBUG0
195 # define DEBUG0(x) x
196 #else
197 # define DEBUG0(x) C_NOP
198 #endif
199 #ifdef DC390_DEBUG1
200 # define DEBUG1(x) x
201 #else
202 # define DEBUG1(x) C_NOP
203 #endif
204 #ifdef DC390_DCBDEBUG
205 # define DCBDEBUG(x) x
206 #else
207 # define DCBDEBUG(x) C_NOP
208 #endif
209 #ifdef DC390_PARSEDEBUG
210 # define PARSEDEBUG(x) x
211 #else
212 # define PARSEDEBUG(x) C_NOP
213 #endif
214 #ifdef DC390_REMOVABLEDEBUG
215 # define REMOVABLEDEBUG(x) x
216 #else
217 # define REMOVABLEDEBUG(x) C_NOP
218 #endif
219 #define DCBDEBUG1(x) C_NOP
220
221 #include <linux/module.h>
222 #include <linux/delay.h>
223 #include <linux/signal.h>
224 #include <linux/errno.h>
225 #include <linux/kernel.h>
226 #include <linux/ioport.h>
227 #include <linux/pci.h>
228 #include <linux/proc_fs.h>
229 #include <linux/string.h>
230 #include <linux/mm.h>
231 #include <linux/blkdev.h>
232 #include <linux/timer.h>
233 #include <linux/interrupt.h>
234 #include <linux/init.h>
235 #include <linux/spinlock.h>
236 #include <linux/slab.h>
237 #include <asm/io.h>
238
239 #include <scsi/scsi.h>
240 #include <scsi/scsi_cmnd.h>
241 #include <scsi/scsi_device.h>
242 #include <scsi/scsi_host.h>
243 #include <scsi/scsicam.h>
244 #include <scsi/scsi_tcq.h>
245
246 #define DC390_BANNER "Tekram DC390/AM53C974"
247 #define DC390_VERSION "2.1d 2004-05-27"
248
249 #define PCI_DEVICE_ID_AMD53C974 PCI_DEVICE_ID_AMD_SCSI
250
251 #include "tmscsim.h"
252
253
254 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
255 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
256 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
257 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
258 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
259 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
260 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
261 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
262 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
263 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
264 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
265 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
266 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
267 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
268
269 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
270 static void dc390_Disconnect( struct dc390_acb* pACB );
271 static void dc390_Reselect( struct dc390_acb* pACB );
272 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
273 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
274 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
275 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
276 static void dc390_ResetDevParam(struct dc390_acb* pACB);
277
278 static u32 dc390_laststatus = 0;
279 static u8 dc390_adapterCnt = 0;
280
281 static int disable_clustering;
282 module_param(disable_clustering, int, S_IRUGO);
283 MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
284
285 /* Startup values, to be overriden on the commandline */
286 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
287
288 module_param_array(tmscsim, int, NULL, 0);
289 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
290 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
291 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
292 MODULE_LICENSE("GPL");
293 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
294
295 static void *dc390_phase0[]={
296 dc390_DataOut_0,
297 dc390_DataIn_0,
298 dc390_Command_0,
299 dc390_Status_0,
300 dc390_Nop_0,
301 dc390_Nop_0,
302 dc390_MsgOut_0,
303 dc390_MsgIn_0,
304 dc390_Nop_1
305 };
306
307 static void *dc390_phase1[]={
308 dc390_DataOutPhase,
309 dc390_DataInPhase,
310 dc390_CommandPhase,
311 dc390_StatusPhase,
312 dc390_Nop_0,
313 dc390_Nop_0,
314 dc390_MsgOutPhase,
315 dc390_MsgInPhase,
316 dc390_Nop_1
317 };
318
319 #ifdef DC390_DEBUG1
320 static char* dc390_p0_str[] = {
321 "dc390_DataOut_0",
322 "dc390_DataIn_0",
323 "dc390_Command_0",
324 "dc390_Status_0",
325 "dc390_Nop_0",
326 "dc390_Nop_0",
327 "dc390_MsgOut_0",
328 "dc390_MsgIn_0",
329 "dc390_Nop_1"
330 };
331
332 static char* dc390_p1_str[] = {
333 "dc390_DataOutPhase",
334 "dc390_DataInPhase",
335 "dc390_CommandPhase",
336 "dc390_StatusPhase",
337 "dc390_Nop_0",
338 "dc390_Nop_0",
339 "dc390_MsgOutPhase",
340 "dc390_MsgInPhase",
341 "dc390_Nop_1"
342 };
343 #endif
344
345 static u8 dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
346 static u8 dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
347 static u8 dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
348
349 /***********************************************************************
350 * Functions for the management of the internal structures
351 * (DCBs, SRBs, Queueing)
352 *
353 **********************************************************************/
354 static void inline dc390_start_segment(struct dc390_srb* pSRB)
355 {
356 struct scatterlist *psgl = pSRB->pSegmentList;
357
358 /* start new sg segment */
359 pSRB->SGBusAddr = sg_dma_address(psgl);
360 pSRB->SGToBeXferLen = sg_dma_len(psgl);
361 }
362
363 static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
364 {
365 unsigned long xfer = pSRB->SGToBeXferLen - residue;
366
367 /* xfer more bytes transferred */
368 pSRB->SGBusAddr += xfer;
369 pSRB->TotalXferredLen += xfer;
370 pSRB->SGToBeXferLen = residue;
371
372 return xfer;
373 }
374
375 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
376 {
377 struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
378 while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
379 {
380 pDCB = pDCB->pNextDCB;
381 if (pDCB == pACB->pLinkDCB)
382 return NULL;
383 }
384 DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
385 pDCB, pDCB->TargetID, pDCB->TargetLUN));
386 return pDCB;
387 }
388
389 /* Insert SRB oin top of free list */
390 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
391 {
392 DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
393 pSRB->pNextSRB = pACB->pFreeSRB;
394 pACB->pFreeSRB = pSRB;
395 }
396
397 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
398 {
399 pDCB->GoingSRBCnt++;
400 DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
401 /* Append to the list of Going commands */
402 if( pDCB->pGoingSRB )
403 pDCB->pGoingLast->pNextSRB = pSRB;
404 else
405 pDCB->pGoingSRB = pSRB;
406
407 pDCB->pGoingLast = pSRB;
408 /* No next one in sent list */
409 pSRB->pNextSRB = NULL;
410 }
411
412 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
413 {
414 DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
415 if (pSRB == pDCB->pGoingSRB)
416 pDCB->pGoingSRB = pSRB->pNextSRB;
417 else
418 {
419 struct dc390_srb* psrb = pDCB->pGoingSRB;
420 while (psrb && psrb->pNextSRB != pSRB)
421 psrb = psrb->pNextSRB;
422 if (!psrb)
423 { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
424 psrb->pNextSRB = pSRB->pNextSRB;
425 if (pSRB == pDCB->pGoingLast)
426 pDCB->pGoingLast = psrb;
427 }
428 pDCB->GoingSRBCnt--;
429 }
430
431 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
432 {
433 sg_init_one(sg, addr, length);
434 return sg;
435 }
436
437 /* Create pci mapping */
438 static int dc390_pci_map (struct dc390_srb* pSRB)
439 {
440 int error = 0;
441 struct scsi_cmnd *pcmd = pSRB->pcmd;
442 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
443 dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
444
445 /* Map sense buffer */
446 if (pSRB->SRBFlag & AUTO_REQSENSE) {
447 pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
448 pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1,
449 DMA_FROM_DEVICE);
450 cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList);
451
452 /* TODO: error handling */
453 if (pSRB->SGcount != 1)
454 error = 1;
455 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __func__, pcmd->sense_buffer, cmdp->saved_dma_handle));
456 /* Map SG list */
457 } else if (scsi_sg_count(pcmd)) {
458 int nseg;
459
460 nseg = scsi_dma_map(pcmd);
461
462 pSRB->pSegmentList = scsi_sglist(pcmd);
463 pSRB->SGcount = nseg;
464
465 /* TODO: error handling */
466 if (nseg < 0)
467 error = 1;
468 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
469 __func__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
470 /* Map single segment */
471 } else
472 pSRB->SGcount = 0;
473
474 return error;
475 }
476
477 /* Remove pci mapping */
478 static void dc390_pci_unmap (struct dc390_srb* pSRB)
479 {
480 struct scsi_cmnd *pcmd = pSRB->pcmd;
481 struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
482 DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
483
484 if (pSRB->SRBFlag) {
485 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
486 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __func__, cmdp->saved_dma_handle));
487 } else {
488 scsi_dma_unmap(pcmd);
489 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
490 __func__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
491 }
492 }
493
494 static void __inline__
495 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
496 {
497 if (pSRB->TagNumber != SCSI_NO_TAG) {
498 pDCB->TagMask &= ~(1 << pSRB->TagNumber); /* free tag mask */
499 pSRB->TagNumber = SCSI_NO_TAG;
500 }
501 }
502
503
504 static int
505 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
506 {
507 struct scsi_cmnd *scmd = pSRB->pcmd;
508 struct scsi_device *sdev = scmd->device;
509 u8 cmd, disc_allowed, try_sync_nego;
510
511 pSRB->ScsiPhase = SCSI_NOP0;
512
513 if (pACB->Connected)
514 {
515 // Should not happen normally
516 printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
517 pSRB->SRBState, pSRB->SRBFlag);
518 pSRB->SRBState = SRB_READY;
519 pACB->SelConn++;
520 return 1;
521 }
522 if (time_before (jiffies, pACB->last_reset))
523 {
524 DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
525 return 1;
526 }
527 /* KG: Moved pci mapping here */
528 dc390_pci_map(pSRB);
529 /* TODO: error handling */
530 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
531 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
532 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
533 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
534 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
535 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
536 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD); /* Flush FIFO */
537 DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
538 scmd->cmnd[0], pDCB->SyncMode));
539
540 /* Don't disconnect on AUTO_REQSENSE, cause it might be an
541 * Contingent Allegiance Condition (6.6), where no tags should be used.
542 * All other have to be allowed to disconnect to prevent Incorrect
543 * Initiator Connection (6.8.2/6.5.2) */
544 /* Changed KG, 99/06/06 */
545 if (! (pSRB->SRBFlag & AUTO_REQSENSE))
546 disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
547 else
548 disc_allowed = 0;
549
550 if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
551 (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
552 !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
553 try_sync_nego = 1;
554 else
555 try_sync_nego = 0;
556
557 pSRB->MsgCnt = 0;
558 cmd = SEL_W_ATN;
559 DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
560 /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
561 if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && (scmd->flags & SCMD_TAGGED)) {
562 DC390_write8(ScsiFifo, MSG_SIMPLE_TAG);
563 pDCB->TagMask |= 1 << scmd->request->tag;
564 pSRB->TagNumber = scmd->request->tag;
565 DC390_write8(ScsiFifo, scmd->request->tag);
566 DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for SRB %p, block tag %02x\n", pSRB, tag[1]));
567 cmd = SEL_W_ATN3;
568 } else {
569 /* No TagQ */
570 //no_tag:
571 DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for SRB %p, No TagQ\n", disc_allowed ? "" : "o", pSRB));
572 }
573
574 pSRB->SRBState = SRB_START_;
575
576 if (try_sync_nego)
577 {
578 u8 Sync_Off = pDCB->SyncOffset;
579 DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
580 pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
581 pSRB->MsgOutBuf[1] = 3;
582 pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
583 pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
584 if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
585 pSRB->MsgOutBuf[4] = Sync_Off;
586 pSRB->MsgCnt = 5;
587 //pSRB->SRBState = SRB_MSGOUT_;
588 pSRB->SRBState |= DO_SYNC_NEGO;
589 cmd = SEL_W_ATN_STOP;
590 }
591
592 /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
593 if (cmd != SEL_W_ATN_STOP)
594 {
595 if( pSRB->SRBFlag & AUTO_REQSENSE )
596 {
597 DC390_write8 (ScsiFifo, REQUEST_SENSE);
598 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
599 DC390_write8 (ScsiFifo, 0);
600 DC390_write8 (ScsiFifo, 0);
601 DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
602 DC390_write8 (ScsiFifo, 0);
603 DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
604 }
605 else /* write cmnd to bus */
606 {
607 u8 *ptr; u8 i;
608 ptr = (u8 *)scmd->cmnd;
609 for (i = 0; i < scmd->cmd_len; i++)
610 DC390_write8 (ScsiFifo, *(ptr++));
611 }
612 }
613 DEBUG0(if (pACB->pActiveDCB) \
614 printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
615 DEBUG0(if (pDCB->pActiveSRB) \
616 printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
617 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
618 if (DC390_read8 (Scsi_Status) & INTERRUPT)
619 {
620 dc390_freetag (pDCB, pSRB);
621 DEBUG0(printk ("DC390: Interrupt during Start SCSI (target %02i-%02i)\n",
622 scmd->device->id, (u8)scmd->device->lun));
623 pSRB->SRBState = SRB_READY;
624 //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
625 pACB->SelLost++;
626 return 1;
627 }
628 DC390_write8 (ScsiCmd, cmd);
629 pACB->pActiveDCB = pDCB;
630 pDCB->pActiveSRB = pSRB;
631 pACB->Connected = 1;
632 pSRB->ScsiPhase = SCSI_NOP1;
633 return 0;
634 }
635
636
637 static void __inline__
638 dc390_InvalidCmd(struct dc390_acb* pACB)
639 {
640 if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
641 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
642 }
643
644
645 static irqreturn_t __inline__
646 DC390_Interrupt(void *dev_id)
647 {
648 struct dc390_acb *pACB = dev_id;
649 struct dc390_dcb *pDCB;
650 struct dc390_srb *pSRB;
651 u8 sstatus=0;
652 u8 phase;
653 void (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
654 u8 istate, istatus;
655
656 sstatus = DC390_read8 (Scsi_Status);
657 if( !(sstatus & INTERRUPT) )
658 return IRQ_NONE;
659
660 DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
661
662 //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
663 //dstatus = DC390_read8 (DMA_Status);
664 //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
665
666 spin_lock_irq(pACB->pScsiHost->host_lock);
667
668 istate = DC390_read8 (Intern_State);
669 istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
670
671 DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
672 dc390_laststatus &= ~0x00ffffff;
673 dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
674
675 if (sstatus & ILLEGAL_OP_ERR)
676 {
677 printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
678 dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
679 }
680
681 else if (istatus & INVALID_CMD)
682 {
683 printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
684 dc390_InvalidCmd( pACB );
685 goto unlock;
686 }
687
688 if (istatus & SCSI_RESET)
689 {
690 dc390_ScsiRstDetect( pACB );
691 goto unlock;
692 }
693
694 if (istatus & DISCONNECTED)
695 {
696 dc390_Disconnect( pACB );
697 goto unlock;
698 }
699
700 if (istatus & RESELECTED)
701 {
702 dc390_Reselect( pACB );
703 goto unlock;
704 }
705
706 else if (istatus & (SELECTED | SEL_ATTENTION))
707 {
708 printk (KERN_ERR "DC390: Target mode not supported!\n");
709 goto unlock;
710 }
711
712 if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
713 {
714 pDCB = pACB->pActiveDCB;
715 if (!pDCB)
716 {
717 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
718 goto unlock;
719 }
720 pSRB = pDCB->pActiveSRB;
721 if( pDCB->DCBFlag & ABORT_DEV_ )
722 dc390_EnableMsgOut_Abort (pACB, pSRB);
723
724 phase = pSRB->ScsiPhase;
725 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
726 stateV = (void *) dc390_phase0[phase];
727 ( *stateV )( pACB, pSRB, &sstatus );
728
729 pSRB->ScsiPhase = sstatus & 7;
730 phase = (u8) sstatus & 7;
731 DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
732 stateV = (void *) dc390_phase1[phase];
733 ( *stateV )( pACB, pSRB, &sstatus );
734 }
735
736 unlock:
737 spin_unlock_irq(pACB->pScsiHost->host_lock);
738 return IRQ_HANDLED;
739 }
740
741 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
742 {
743 irqreturn_t ret;
744 DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
745 /* Locking is done in DC390_Interrupt */
746 ret = DC390_Interrupt(dev_id);
747 DEBUG1(printk (".. IRQ returned\n"));
748 return ret;
749 }
750
751 static void
752 dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
753 {
754 u8 sstatus;
755 u32 ResidCnt;
756 u8 dstate = 0;
757
758 sstatus = *psstatus;
759
760 if( !(pSRB->SRBState & SRB_XFERPAD) )
761 {
762 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
763 pSRB->SRBStatus |= PARITY_ERROR;
764
765 if( sstatus & COUNT_2_ZERO )
766 {
767 unsigned long timeout = jiffies + HZ;
768
769 /* Function called from the ISR with the host_lock held and interrupts disabled */
770 if (pSRB->SGToBeXferLen)
771 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
772 spin_unlock_irq(pACB->pScsiHost->host_lock);
773 udelay(50);
774 spin_lock_irq(pACB->pScsiHost->host_lock);
775 }
776 if (!time_before(jiffies, timeout))
777 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
778 DC390_read32 (DMA_Wk_ByteCntr));
779 dc390_laststatus &= ~0xff000000;
780 dc390_laststatus |= dstate << 24;
781 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
782 pSRB->SGIndex++;
783 if( pSRB->SGIndex < pSRB->SGcount )
784 {
785 pSRB->pSegmentList++;
786
787 dc390_start_segment(pSRB);
788 }
789 else
790 pSRB->SGToBeXferLen = 0;
791 }
792 else
793 {
794 ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
795 (((u32) DC390_read8 (CtcReg_High) << 16) |
796 ((u32) DC390_read8 (CtcReg_Mid) << 8) |
797 (u32) DC390_read8 (CtcReg_Low));
798
799 dc390_advance_segment(pSRB, ResidCnt);
800 }
801 }
802 if ((*psstatus & 7) != SCSI_DATA_OUT)
803 {
804 DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
805 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
806 }
807 }
808
809 static void
810 dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
811 {
812 u8 sstatus, residual, bval;
813 u32 ResidCnt, i;
814 unsigned long xferCnt;
815
816 sstatus = *psstatus;
817
818 if( !(pSRB->SRBState & SRB_XFERPAD) )
819 {
820 if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
821 pSRB->SRBStatus |= PARITY_ERROR;
822
823 if( sstatus & COUNT_2_ZERO )
824 {
825 int dstate = 0;
826 unsigned long timeout = jiffies + HZ;
827
828 /* Function called from the ISR with the host_lock held and interrupts disabled */
829 if (pSRB->SGToBeXferLen)
830 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
831 spin_unlock_irq(pACB->pScsiHost->host_lock);
832 udelay(50);
833 spin_lock_irq(pACB->pScsiHost->host_lock);
834 }
835 if (!time_before(jiffies, timeout)) {
836 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
837 DC390_read32 (DMA_Wk_ByteCntr));
838 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
839 }
840 dc390_laststatus &= ~0xff000000;
841 dc390_laststatus |= dstate << 24;
842 DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
843 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8) \
844 + ((unsigned long) DC390_read8 (CtcReg_Low)));
845 DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
846
847 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
848
849 pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
850 pSRB->SGIndex++;
851 if( pSRB->SGIndex < pSRB->SGcount )
852 {
853 pSRB->pSegmentList++;
854
855 dc390_start_segment(pSRB);
856 }
857 else
858 pSRB->SGToBeXferLen = 0;
859 }
860 else /* phase changed */
861 {
862 residual = 0;
863 bval = DC390_read8 (Current_Fifo);
864 while( bval & 0x1f )
865 {
866 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
867 if( (bval & 0x1f) == 1 )
868 {
869 for(i=0; i < 0x100; i++)
870 {
871 bval = DC390_read8 (Current_Fifo);
872 if( !(bval & 0x1f) )
873 goto din_1;
874 else if( i == 0x0ff )
875 {
876 residual = 1; /* ;1 residual byte */
877 goto din_1;
878 }
879 }
880 }
881 else
882 bval = DC390_read8 (Current_Fifo);
883 }
884 din_1:
885 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
886 for (i = 0xa000; i; i--)
887 {
888 bval = DC390_read8 (DMA_Status);
889 if (bval & BLAST_COMPLETE)
890 break;
891 }
892 /* It seems a DMA Blast abort isn't that bad ... */
893 if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
894 //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
895 dc390_laststatus &= ~0xff000000;
896 dc390_laststatus |= bval << 24;
897
898 DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
899 ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
900 ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
901 (u32) DC390_read8 (CtcReg_Low);
902
903 xferCnt = dc390_advance_segment(pSRB, ResidCnt);
904
905 if (residual) {
906 size_t count = 1;
907 size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
908 unsigned long flags;
909 u8 *ptr;
910
911 bval = DC390_read8 (ScsiFifo); /* get one residual byte */
912
913 local_irq_save(flags);
914 ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
915 if (likely(ptr)) {
916 *(ptr + offset) = bval;
917 scsi_kunmap_atomic_sg(ptr);
918 }
919 local_irq_restore(flags);
920 WARN_ON(!ptr);
921
922 /* 1 more byte read */
923 xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
924 }
925 DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
926 pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
927 }
928 }
929 if ((*psstatus & 7) != SCSI_DATA_IN)
930 {
931 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
932 DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
933 }
934 }
935
936 static void
937 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
938 {
939 }
940
941 static void
942 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
943 {
944
945 pSRB->TargetStatus = DC390_read8 (ScsiFifo);
946 //udelay (1);
947 pSRB->EndMessage = DC390_read8 (ScsiFifo); /* get message */
948
949 *psstatus = SCSI_NOP0;
950 pSRB->SRBState = SRB_COMPLETED;
951 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
952 }
953
954 static void
955 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
956 {
957 if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
958 *psstatus = SCSI_NOP0;
959 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
960 }
961
962
963 static void __inline__
964 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
965 {
966 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
967 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
968 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
969 DC390_write8 (CtrlReg4, pDCB->CtrlR4);
970 dc390_SetXferRate (pACB, pDCB);
971 }
972
973
974 #ifdef DC390_DEBUG0
975 static void
976 dc390_printMsg (u8 *MsgBuf, u8 len)
977 {
978 int i;
979 printk (" %02x", MsgBuf[0]);
980 for (i = 1; i < len; i++)
981 printk (" %02x", MsgBuf[i]);
982 printk ("\n");
983 }
984 #endif
985
986 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
987
988 /* reject_msg */
989 static void __inline__
990 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
991 {
992 pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
993 pSRB->MsgCnt = 1;
994 DC390_ENABLE_MSGOUT;
995 DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
996 }
997
998 /* abort command */
999 static void
1000 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1001 {
1002 pSRB->MsgOutBuf[0] = ABORT;
1003 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1004 pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1005 }
1006
1007 static struct dc390_srb*
1008 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1009 {
1010 struct dc390_srb* pSRB = pDCB->pGoingSRB;
1011
1012 if (pSRB)
1013 {
1014 struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1015 pSRB = (struct dc390_srb *)scmd->host_scribble;
1016
1017 if (pDCB->DCBFlag & ABORT_DEV_)
1018 {
1019 pSRB->SRBState = SRB_ABORT_SENT;
1020 dc390_EnableMsgOut_Abort( pACB, pSRB );
1021 }
1022
1023 if (!(pSRB->SRBState & SRB_DISCONNECT))
1024 goto mingx0;
1025
1026 pDCB->pActiveSRB = pSRB;
1027 pSRB->SRBState = SRB_DATA_XFER;
1028 }
1029 else
1030 {
1031 mingx0:
1032 pSRB = pACB->pTmpSRB;
1033 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1034 pDCB->pActiveSRB = pSRB;
1035 pSRB->MsgOutBuf[0] = ABORT_TAG;
1036 pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1037 }
1038 return pSRB;
1039 }
1040
1041
1042 /* set async transfer mode */
1043 static void
1044 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1045 {
1046 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1047 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1048 printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1049 pSRB->SRBState &= ~DO_SYNC_NEGO;
1050 pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1051 pDCB->SyncPeriod = 0;
1052 pDCB->SyncOffset = 0;
1053 //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1054 pDCB->CtrlR3 = FAST_CLK; /* fast clock / normal scsi */
1055 pDCB->CtrlR4 &= 0x3f;
1056 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1057 dc390_reprog (pACB, pDCB);
1058 }
1059
1060 /* set sync transfer mode */
1061 static void
1062 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1063 {
1064 u8 bval;
1065 u16 wval, wval1;
1066 struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1067 u8 oldsyncperiod = pDCB->SyncPeriod;
1068 u8 oldsyncoffset = pDCB->SyncOffset;
1069
1070 if (!(pSRB->SRBState & DO_SYNC_NEGO))
1071 {
1072 printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1073 pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1074
1075 /* reject */
1076 //dc390_MsgIn_reject (pACB, pSRB);
1077 //return dc390_MsgIn_set_async (pACB, pSRB);
1078
1079 /* Reply with corrected SDTR Message */
1080 if (pSRB->MsgInBuf[4] > 15)
1081 {
1082 printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1083 pSRB->MsgInBuf[4] = 15;
1084 }
1085 if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1086 {
1087 printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1088 pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1089 }
1090 memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1091 pSRB->MsgCnt = 5;
1092 DC390_ENABLE_MSGOUT;
1093 }
1094
1095 pSRB->SRBState &= ~DO_SYNC_NEGO;
1096 pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1097 pDCB->SyncOffset &= 0x0f0;
1098 pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1099 pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1100
1101 wval = (u16) pSRB->MsgInBuf[3];
1102 wval = wval << 2; wval -= 3; wval1 = wval / 25; /* compute speed */
1103 if( (wval1 * 25) != wval) wval1++;
1104 bval = FAST_CLK+FAST_SCSI; /* fast clock / fast scsi */
1105
1106 pDCB->CtrlR4 &= 0x3f; /* Glitch eater: 12ns less than normal */
1107 if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1108 pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1109 else
1110 pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1111 if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1112
1113 if (wval1 >= 8)
1114 {
1115 wval1--; /* Timing computation differs by 1 from FAST_SCSI */
1116 bval = FAST_CLK; /* fast clock / normal scsi */
1117 pDCB->CtrlR4 |= pACB->glitch_cfg; /* glitch eater */
1118 }
1119
1120 pDCB->CtrlR3 = bval;
1121 pDCB->SyncPeriod = (u8)wval1;
1122
1123 if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1124 {
1125 if (! (bval & FAST_SCSI)) wval1++;
1126 printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1127 40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1128 }
1129
1130 dc390_reprog (pACB, pDCB);
1131 }
1132
1133
1134 /* handle RESTORE_PTR */
1135 /* This doesn't look very healthy... to-be-fixed */
1136 static void
1137 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1138 {
1139 struct scsi_cmnd *pcmd = pSRB->pcmd;
1140 struct scatterlist *psgl;
1141 pSRB->TotalXferredLen = 0;
1142 pSRB->SGIndex = 0;
1143 if (scsi_sg_count(pcmd)) {
1144 size_t saved;
1145 pSRB->pSegmentList = scsi_sglist(pcmd);
1146 psgl = pSRB->pSegmentList;
1147 //dc390_pci_sync(pSRB);
1148
1149 while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1150 {
1151 pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1152 pSRB->SGIndex++;
1153 if( pSRB->SGIndex < pSRB->SGcount )
1154 {
1155 pSRB->pSegmentList++;
1156
1157 dc390_start_segment(pSRB);
1158 }
1159 else
1160 pSRB->SGToBeXferLen = 0;
1161 }
1162
1163 saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1164 pSRB->SGToBeXferLen -= saved;
1165 pSRB->SGBusAddr += saved;
1166 printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1167 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1168
1169 } else {
1170 pSRB->SGcount = 0;
1171 printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1172 }
1173
1174 pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1175 }
1176
1177
1178 /* According to the docs, the AM53C974 reads the message and
1179 * generates a Successful Operation IRQ before asserting ACK for
1180 * the last byte (how does it know whether it's the last ?) */
1181 /* The old code handled it in another way, indicating, that on
1182 * every message byte an IRQ is generated and every byte has to
1183 * be manually ACKed. Hmmm ? (KG, 98/11/28) */
1184 /* The old implementation was correct. Sigh! */
1185
1186 /* Check if the message is complete */
1187 static u8 __inline__
1188 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1189 {
1190 if (*msgbuf == EXTENDED_MESSAGE)
1191 {
1192 if (len < 2) return 0;
1193 if (len < msgbuf[1] + 2) return 0;
1194 }
1195 else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1196 if (len < 2) return 0;
1197 return 1;
1198 }
1199
1200
1201
1202 /* read and eval received messages */
1203 static void
1204 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1205 {
1206 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1207
1208 /* Read the msg */
1209
1210 pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1211 //pSRB->SRBState = 0;
1212
1213 /* Msg complete ? */
1214 if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1215 {
1216 DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1217 /* Now eval the msg */
1218 switch (pSRB->MsgInBuf[0])
1219 {
1220 case DISCONNECT:
1221 pSRB->SRBState = SRB_DISCONNECT; break;
1222
1223 case SIMPLE_QUEUE_TAG:
1224 case HEAD_OF_QUEUE_TAG:
1225 case ORDERED_QUEUE_TAG:
1226 pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1227 break;
1228
1229 case MESSAGE_REJECT:
1230 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1231 pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1232 if( pSRB->SRBState & DO_SYNC_NEGO)
1233 dc390_MsgIn_set_async (pACB, pSRB);
1234 break;
1235
1236 case EXTENDED_MESSAGE:
1237 /* reject every extended msg but SDTR */
1238 if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1239 dc390_MsgIn_reject (pACB, pSRB);
1240 else
1241 {
1242 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1243 dc390_MsgIn_set_async (pACB, pSRB);
1244 else
1245 dc390_MsgIn_set_sync (pACB, pSRB);
1246 }
1247
1248 // nothing has to be done
1249 case COMMAND_COMPLETE: break;
1250
1251 // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1252 // scsi command. Thanks, Gerard, for pointing it out.
1253 case SAVE_POINTERS:
1254 pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1255 break;
1256 // The device might want to restart transfer with a RESTORE
1257 case RESTORE_POINTERS:
1258 DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1259 dc390_restore_ptr (pACB, pSRB);
1260 break;
1261
1262 // reject unknown messages
1263 default: dc390_MsgIn_reject (pACB, pSRB);
1264 }
1265
1266 /* Clear counter and MsgIn state */
1267 pSRB->SRBState &= ~SRB_MSGIN;
1268 pACB->MsgLen = 0;
1269 }
1270
1271 *psstatus = SCSI_NOP0;
1272 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1273 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1274 }
1275
1276
1277 static void
1278 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1279 {
1280 unsigned long lval;
1281 struct dc390_dcb* pDCB = pACB->pActiveDCB;
1282
1283 if (pSRB == pACB->pTmpSRB)
1284 {
1285 if (pDCB)
1286 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1287 else
1288 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1289
1290 /* Try to recover - some broken disks react badly to tagged INQUIRY */
1291 if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1292 pSRB = pDCB->pGoingSRB;
1293 pDCB->pActiveSRB = pSRB;
1294 } else {
1295 pSRB->pSRBDCB = pDCB;
1296 dc390_EnableMsgOut_Abort(pACB, pSRB);
1297 if (pDCB)
1298 pDCB->DCBFlag |= ABORT_DEV;
1299 return;
1300 }
1301 }
1302
1303 if( pSRB->SGIndex < pSRB->SGcount )
1304 {
1305 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1306 if( !pSRB->SGToBeXferLen )
1307 {
1308 dc390_start_segment(pSRB);
1309
1310 DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1311 }
1312 lval = pSRB->SGToBeXferLen;
1313 DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1314 DC390_write8 (CtcReg_Low, (u8) lval);
1315 lval >>= 8;
1316 DC390_write8 (CtcReg_Mid, (u8) lval);
1317 lval >>= 8;
1318 DC390_write8 (CtcReg_High, (u8) lval);
1319
1320 DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1321 DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1322
1323 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1324 pSRB->SRBState = SRB_DATA_XFER;
1325
1326 DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1327
1328 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1329 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1330 //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1331 //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1332 }
1333 else /* xfer pad */
1334 {
1335 if( pSRB->SGcount )
1336 {
1337 pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1338 pSRB->SRBStatus |= OVER_RUN;
1339 DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1340 }
1341 DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1342 DC390_write8 (CtcReg_Low, 0);
1343 DC390_write8 (CtcReg_Mid, 0);
1344 DC390_write8 (CtcReg_High, 0);
1345
1346 pSRB->SRBState |= SRB_XFERPAD;
1347 DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1348 /*
1349 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1350 DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1351 */
1352 }
1353 }
1354
1355
1356 static void
1357 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1358 {
1359 dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1360 }
1361
1362 static void
1363 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1364 {
1365 dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1366 }
1367
1368 static void
1369 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1370 {
1371 struct dc390_dcb* pDCB;
1372 u8 i, cnt;
1373 u8 *ptr;
1374
1375 DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1376 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1377 if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1378 {
1379 cnt = (u8) pSRB->pcmd->cmd_len;
1380 ptr = (u8 *) pSRB->pcmd->cmnd;
1381 for(i=0; i < cnt; i++)
1382 DC390_write8 (ScsiFifo, *(ptr++));
1383 }
1384 else
1385 {
1386 DC390_write8 (ScsiFifo, REQUEST_SENSE);
1387 pDCB = pACB->pActiveDCB;
1388 DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1389 DC390_write8 (ScsiFifo, 0);
1390 DC390_write8 (ScsiFifo, 0);
1391 DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
1392 DC390_write8 (ScsiFifo, 0);
1393 DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1394 }
1395 pSRB->SRBState = SRB_COMMAND;
1396 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1397 }
1398
1399 static void
1400 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1401 {
1402 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1403 pSRB->SRBState = SRB_STATUS;
1404 DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1405 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1406 }
1407
1408 static void
1409 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1410 {
1411 u8 bval, i, cnt;
1412 u8 *ptr;
1413 struct dc390_dcb* pDCB;
1414
1415 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1416 pDCB = pACB->pActiveDCB;
1417 if( !(pSRB->SRBState & SRB_MSGOUT) )
1418 {
1419 cnt = pSRB->MsgCnt;
1420 if( cnt )
1421 {
1422 ptr = (u8 *) pSRB->MsgOutBuf;
1423 for(i=0; i < cnt; i++)
1424 DC390_write8 (ScsiFifo, *(ptr++));
1425 pSRB->MsgCnt = 0;
1426 if( (pDCB->DCBFlag & ABORT_DEV_) &&
1427 (pSRB->MsgOutBuf[0] == ABORT) )
1428 pSRB->SRBState = SRB_ABORT_SENT;
1429 }
1430 else
1431 {
1432 bval = ABORT; /* ??? MSG_NOP */
1433 if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1434 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1435 (pSRB->SRBFlag & AUTO_REQSENSE) )
1436 {
1437 if( pDCB->SyncMode & SYNC_ENABLE )
1438 goto mop1;
1439 }
1440 DC390_write8 (ScsiFifo, bval);
1441 }
1442 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1443 }
1444 else
1445 {
1446 mop1:
1447 printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1448 DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1449 DC390_write8 (ScsiFifo, 3); /* ;length of extended msg */
1450 DC390_write8 (ScsiFifo, EXTENDED_SDTR); /* ; sync nego */
1451 DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1452 if (pDCB->SyncOffset & 0x0f)
1453 DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1454 else
1455 DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1456 pSRB->SRBState |= DO_SYNC_NEGO;
1457 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1458 }
1459 }
1460
1461 static void
1462 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1463 {
1464 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1465 if( !(pSRB->SRBState & SRB_MSGIN) )
1466 {
1467 pSRB->SRBState &= ~SRB_DISCONNECT;
1468 pSRB->SRBState |= SRB_MSGIN;
1469 }
1470 DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1471 //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1472 }
1473
1474 static void
1475 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1476 {
1477 }
1478
1479 static void
1480 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1481 {
1482 }
1483
1484
1485 static void
1486 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1487 {
1488 u8 bval, i, cnt;
1489 struct dc390_dcb* ptr;
1490
1491 if( !(pDCB->TargetLUN) )
1492 {
1493 if( !pACB->scan_devices )
1494 {
1495 ptr = pACB->pLinkDCB;
1496 cnt = pACB->DCBCnt;
1497 bval = pDCB->TargetID;
1498 for(i=0; i<cnt; i++)
1499 {
1500 if( ptr->TargetID == bval )
1501 {
1502 ptr->SyncPeriod = pDCB->SyncPeriod;
1503 ptr->SyncOffset = pDCB->SyncOffset;
1504 ptr->CtrlR3 = pDCB->CtrlR3;
1505 ptr->CtrlR4 = pDCB->CtrlR4;
1506 ptr->SyncMode = pDCB->SyncMode;
1507 }
1508 ptr = ptr->pNextDCB;
1509 }
1510 }
1511 }
1512 return;
1513 }
1514
1515
1516 static void
1517 dc390_Disconnect( struct dc390_acb* pACB )
1518 {
1519 struct dc390_dcb *pDCB;
1520 struct dc390_srb *pSRB, *psrb;
1521 u8 i, cnt;
1522
1523 DEBUG0(printk(KERN_INFO "DISC,"));
1524
1525 if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1526 pACB->Connected = 0;
1527 pDCB = pACB->pActiveDCB;
1528 if (!pDCB)
1529 {
1530 DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1531 pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1532 mdelay(400);
1533 DC390_read8 (INT_Status); /* Reset Pending INT */
1534 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1535 return;
1536 }
1537 DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1538 pSRB = pDCB->pActiveSRB;
1539 pACB->pActiveDCB = NULL;
1540 pSRB->ScsiPhase = SCSI_NOP0;
1541 if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1542 pSRB->SRBState = 0;
1543 else if( pSRB->SRBState & SRB_ABORT_SENT )
1544 {
1545 pDCB->TagMask = 0;
1546 pDCB->DCBFlag = 0;
1547 cnt = pDCB->GoingSRBCnt;
1548 pDCB->GoingSRBCnt = 0;
1549 pSRB = pDCB->pGoingSRB;
1550 for( i=0; i < cnt; i++)
1551 {
1552 psrb = pSRB->pNextSRB;
1553 dc390_Free_insert (pACB, pSRB);
1554 pSRB = psrb;
1555 }
1556 pDCB->pGoingSRB = NULL;
1557 }
1558 else
1559 {
1560 if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1561 !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1562 { /* Selection time out */
1563 pSRB->AdaptStatus = H_SEL_TIMEOUT;
1564 pSRB->TargetStatus = 0;
1565 goto disc1;
1566 }
1567 else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1568 {
1569 disc1:
1570 dc390_freetag (pDCB, pSRB);
1571 pDCB->pActiveSRB = NULL;
1572 pSRB->SRBState = SRB_FREE;
1573 dc390_SRBdone( pACB, pDCB, pSRB);
1574 }
1575 }
1576 pACB->MsgLen = 0;
1577 }
1578
1579
1580 static void
1581 dc390_Reselect( struct dc390_acb* pACB )
1582 {
1583 struct dc390_dcb* pDCB;
1584 struct dc390_srb* pSRB;
1585 u8 id, lun;
1586
1587 DEBUG0(printk(KERN_INFO "RSEL,"));
1588 pACB->Connected = 1;
1589 pDCB = pACB->pActiveDCB;
1590 if( pDCB )
1591 { /* Arbitration lost but Reselection won */
1592 DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1593 pSRB = pDCB->pActiveSRB;
1594 if( !( pACB->scan_devices ) )
1595 {
1596 struct scsi_cmnd *pcmd = pSRB->pcmd;
1597 scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1598 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1599 dc390_Going_remove(pDCB, pSRB);
1600 dc390_Free_insert(pACB, pSRB);
1601 pcmd->scsi_done (pcmd);
1602 DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1603 }
1604 }
1605 /* Get ID */
1606 lun = DC390_read8 (ScsiFifo);
1607 DEBUG0(printk ("Dev %02x,", lun));
1608 if (!(lun & (1 << pACB->pScsiHost->this_id)))
1609 printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1610 else
1611 lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1612 id = 0; while (lun >>= 1) id++;
1613 /* Get LUN */
1614 lun = DC390_read8 (ScsiFifo);
1615 if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1616 lun &= 7;
1617 DEBUG0(printk ("(%02i-%i),", id, lun));
1618 pDCB = dc390_findDCB (pACB, id, lun);
1619 if (!pDCB)
1620 {
1621 printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1622 id, lun);
1623 return;
1624 }
1625 pACB->pActiveDCB = pDCB;
1626 /* TagQ: We expect a message soon, so never mind the exact SRB */
1627 if( pDCB->SyncMode & EN_TAG_QUEUEING )
1628 {
1629 pSRB = pACB->pTmpSRB;
1630 pDCB->pActiveSRB = pSRB;
1631 }
1632 else
1633 {
1634 pSRB = pDCB->pActiveSRB;
1635 if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1636 {
1637 pSRB= pACB->pTmpSRB;
1638 pSRB->SRBState = SRB_UNEXPECT_RESEL;
1639 printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1640 id, lun);
1641 pDCB->pActiveSRB = pSRB;
1642 dc390_EnableMsgOut_Abort ( pACB, pSRB );
1643 }
1644 else
1645 {
1646 if( pDCB->DCBFlag & ABORT_DEV_ )
1647 {
1648 pSRB->SRBState = SRB_ABORT_SENT;
1649 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1650 id, lun);
1651 dc390_EnableMsgOut_Abort( pACB, pSRB );
1652 }
1653 else
1654 pSRB->SRBState = SRB_DATA_XFER;
1655 }
1656 }
1657
1658 DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1659 pSRB->ScsiPhase = SCSI_NOP0;
1660 DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1661 DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1662 DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1663 DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1664 DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1665 DC390_write8 (CtrlReg4, pDCB->CtrlR4); /* ; Glitch eater */
1666 DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD); /* ;to release the /ACK signal */
1667 }
1668
1669 static int __inline__
1670 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1671 {
1672 struct scsi_cmnd *pcmd;
1673
1674 pcmd = pSRB->pcmd;
1675
1676 REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1677 pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1678
1679 pSRB->SRBFlag |= AUTO_REQSENSE;
1680 pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1681 pSRB->AdaptStatus = 0;
1682 pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1683
1684 /* We are called from SRBdone, original PCI mapping has been removed
1685 * already, new one is set up from StartSCSI */
1686 pSRB->SGIndex = 0;
1687
1688 pSRB->TotalXferredLen = 0;
1689 pSRB->SGToBeXferLen = 0;
1690 return dc390_StartSCSI(pACB, pDCB, pSRB);
1691 }
1692
1693
1694 static void
1695 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1696 {
1697 u8 status;
1698 struct scsi_cmnd *pcmd;
1699
1700 pcmd = pSRB->pcmd;
1701 /* KG: Moved pci_unmap here */
1702 dc390_pci_unmap(pSRB);
1703
1704 status = pSRB->TargetStatus;
1705
1706 DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p\n", status, pcmd->result, pSRB));
1707 if(pSRB->SRBFlag & AUTO_REQSENSE)
1708 { /* Last command was a Request Sense */
1709 pSRB->SRBFlag &= ~AUTO_REQSENSE;
1710 pSRB->AdaptStatus = 0;
1711 pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;
1712
1713 //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1714 if (status == SAM_STAT_CHECK_CONDITION)
1715 pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1716 else /* Retry */
1717 {
1718 if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1719 {
1720 /* Don't retry on TEST_UNIT_READY */
1721 pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
1722 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1723 (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1724 } else {
1725 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1726 //pSRB->ScsiCmdLen = (u8) (pSRB->Segment1[0] >> 8);
1727 DEBUG0 (printk ("DC390: RETRY (%02x), target %02i-%02i\n", pcmd->cmnd[0], pcmd->device->id, (u8)pcmd->device->lun));
1728 pSRB->TotalXferredLen = 0;
1729 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1730 }
1731 }
1732 goto cmd_done;
1733 }
1734 if( status )
1735 {
1736 if (status == SAM_STAT_CHECK_CONDITION)
1737 {
1738 if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1739 SET_RES_DID(pcmd->result, DID_ERROR);
1740 goto cmd_done;
1741 }
1742 return;
1743 }
1744 else if (status == SAM_STAT_TASK_SET_FULL)
1745 {
1746 scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1747 DEBUG0 (printk ("DC390: RETRY (%02x), target %02i-%02i\n", pcmd->cmnd[0], pcmd->device->id, (u8)pcmd->device->lun));
1748 pSRB->TotalXferredLen = 0;
1749 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1750 }
1751 else if (status == SAM_STAT_BUSY &&
1752 (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1753 pACB->scan_devices)
1754 {
1755 pSRB->AdaptStatus = 0;
1756 pSRB->TargetStatus = status;
1757 pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1758 }
1759 else
1760 { /* Another error */
1761 pSRB->TotalXferredLen = 0;
1762 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1763 goto cmd_done;
1764 }
1765 }
1766 else
1767 { /* Target status == 0 */
1768 status = pSRB->AdaptStatus;
1769 if (status == H_OVER_UNDER_RUN)
1770 {
1771 pSRB->TargetStatus = 0;
1772 SET_RES_DID(pcmd->result,DID_OK);
1773 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1774 }
1775 else if (status == H_SEL_TIMEOUT)
1776 {
1777 pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
1778 /* Devices are removed below ... */
1779 }
1780 else if( pSRB->SRBStatus & PARITY_ERROR)
1781 {
1782 //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1783 SET_RES_DID(pcmd->result,DID_PARITY);
1784 SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1785 }
1786 else /* No error */
1787 {
1788 pSRB->AdaptStatus = 0;
1789 pSRB->TargetStatus = 0;
1790 SET_RES_DID(pcmd->result,DID_OK);
1791 }
1792 }
1793
1794 cmd_done:
1795 scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
1796
1797 dc390_Going_remove (pDCB, pSRB);
1798 /* Add to free list */
1799 dc390_Free_insert (pACB, pSRB);
1800
1801 DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done\n"));
1802 pcmd->scsi_done (pcmd);
1803
1804 return;
1805 }
1806
1807
1808 /* Remove all SRBs from Going list and inform midlevel */
1809 static void
1810 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1811 {
1812 struct dc390_dcb *pDCB, *pdcb;
1813 struct dc390_srb *psrb, *psrb2;
1814 int i;
1815 struct scsi_cmnd *pcmd;
1816
1817 pDCB = pACB->pLinkDCB;
1818 pdcb = pDCB;
1819 if (! pdcb) return;
1820 do
1821 {
1822 psrb = pdcb->pGoingSRB;
1823 for (i = 0; i < pdcb->GoingSRBCnt; i++)
1824 {
1825 psrb2 = psrb->pNextSRB;
1826 pcmd = psrb->pcmd;
1827 dc390_Free_insert (pACB, psrb);
1828 psrb = psrb2;
1829 }
1830 pdcb->GoingSRBCnt = 0;
1831 pdcb->pGoingSRB = NULL;
1832 pdcb->TagMask = 0;
1833 pdcb = pdcb->pNextDCB;
1834 } while( pdcb != pDCB );
1835 }
1836
1837
1838 static void
1839 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1840 {
1841 //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1842 //udelay (250);
1843 //DC390_write8 (ScsiCmd, NOP_CMD);
1844
1845 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1846 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1847 DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1848 pACB->Connected = 0;
1849
1850 return;
1851 }
1852
1853 static void
1854 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1855 {
1856 printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1857 //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1858
1859 DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1860 /* Unlock before ? */
1861 /* delay half a second */
1862 udelay (1000);
1863 DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1864 pACB->last_reset = jiffies + 5*HZ/2
1865 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1866 pACB->Connected = 0;
1867
1868 if( pACB->ACBFlag & RESET_DEV )
1869 pACB->ACBFlag |= RESET_DONE;
1870 else
1871 { /* Reset was issued by sb else */
1872 pACB->ACBFlag |= RESET_DETECT;
1873
1874 dc390_ResetDevParam( pACB );
1875 dc390_DoingSRB_Done( pACB, NULL);
1876 //dc390_RecoverSRB( pACB );
1877 pACB->pActiveDCB = NULL;
1878 pACB->ACBFlag = 0;
1879 }
1880 return;
1881 }
1882
1883 static int DC390_queuecommand_lck(struct scsi_cmnd *cmd,
1884 void (*done)(struct scsi_cmnd *))
1885 {
1886 struct scsi_device *sdev = cmd->device;
1887 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1888 struct dc390_dcb *dcb = sdev->hostdata;
1889 struct dc390_srb *srb;
1890
1891 if (sdev->queue_depth <= dcb->GoingSRBCnt)
1892 goto device_busy;
1893 if (acb->pActiveDCB)
1894 goto host_busy;
1895 if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1896 goto host_busy;
1897
1898 srb = acb->pFreeSRB;
1899 if (unlikely(srb == NULL))
1900 goto host_busy;
1901
1902 cmd->scsi_done = done;
1903 cmd->result = 0;
1904 acb->Cmds++;
1905
1906 acb->pFreeSRB = srb->pNextSRB;
1907 srb->pNextSRB = NULL;
1908
1909 srb->pSRBDCB = dcb;
1910 srb->pcmd = cmd;
1911 cmd->host_scribble = (char *)srb;
1912
1913 srb->SGIndex = 0;
1914 srb->AdaptStatus = 0;
1915 srb->TargetStatus = 0;
1916 srb->MsgCnt = 0;
1917
1918 srb->SRBStatus = 0;
1919 srb->SRBFlag = 0;
1920 srb->SRBState = 0;
1921 srb->TotalXferredLen = 0;
1922 srb->SGBusAddr = 0;
1923 srb->SGToBeXferLen = 0;
1924 srb->ScsiPhase = 0;
1925 srb->EndMessage = 0;
1926 srb->TagNumber = SCSI_NO_TAG;
1927
1928 if (dc390_StartSCSI(acb, dcb, srb)) {
1929 dc390_Free_insert(acb, srb);
1930 goto host_busy;
1931 }
1932
1933 dc390_Going_append(dcb, srb);
1934
1935 return 0;
1936
1937 host_busy:
1938 return SCSI_MLQUEUE_HOST_BUSY;
1939
1940 device_busy:
1941 return SCSI_MLQUEUE_DEVICE_BUSY;
1942 }
1943
1944 static DEF_SCSI_QCMD(DC390_queuecommand)
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, "DC390: Abort command\n");
1998
1999 /* abort() is too stupid for already sent commands at the moment.
2000 * If it's called we are in trouble anyway, so let's dump some info
2001 * into the syslog at least. (KG, 98/08/20,99/06/20) */
2002 dc390_dumpinfo(pACB, pDCB, NULL);
2003
2004 pDCB->DCBFlag |= ABORT_DEV_;
2005 printk(KERN_INFO "DC390: Aborted.\n");
2006
2007 return FAILED;
2008 }
2009
2010
2011 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2012 {
2013 struct dc390_dcb *pDCB, *pdcb;
2014
2015 pDCB = pACB->pLinkDCB;
2016 if (! pDCB) return;
2017 pdcb = pDCB;
2018 do
2019 {
2020 pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2021 pDCB->SyncPeriod = 0;
2022 pDCB->SyncOffset = 0;
2023 pDCB->TagMask = 0;
2024 pDCB->CtrlR3 = FAST_CLK;
2025 pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2026 pDCB->CtrlR4 |= pACB->glitch_cfg;
2027 pDCB = pDCB->pNextDCB;
2028 }
2029 while( pdcb != pDCB );
2030 pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2031
2032 }
2033
2034 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2035 {
2036 struct dc390_acb* pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2037 u8 bval;
2038
2039 spin_lock_irq(cmd->device->host->host_lock);
2040
2041 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2042 DC390_write8(CtrlReg1, bval); /* disable IRQ on bus reset */
2043
2044 pACB->ACBFlag |= RESET_DEV;
2045 dc390_ResetSCSIBus(pACB);
2046
2047 dc390_ResetDevParam(pACB);
2048 mdelay(1);
2049 pACB->last_reset = jiffies + 3*HZ/2
2050 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2051
2052 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2053 DC390_read8(INT_Status); /* Reset Pending INT */
2054
2055 dc390_DoingSRB_Done(pACB, cmd);
2056
2057 pACB->pActiveDCB = NULL;
2058 pACB->ACBFlag = 0;
2059
2060 bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2061 DC390_write8(CtrlReg1, bval); /* re-enable interrupt */
2062
2063 spin_unlock_irq(cmd->device->host->host_lock);
2064
2065 return SUCCESS;
2066 }
2067
2068 /**
2069 * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2070 * scsi device that we need to deal with.
2071 *
2072 * @scsi_device: The new scsi device that we need to handle.
2073 */
2074 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2075 {
2076 struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2077 struct dc390_dcb *pDCB, *pDCB2 = NULL;
2078 uint id = scsi_device->id;
2079 uint lun = scsi_device->lun;
2080
2081 pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2082 if (!pDCB)
2083 return -ENOMEM;
2084
2085 if (!pACB->DCBCnt++) {
2086 pACB->pLinkDCB = pDCB;
2087 pACB->pDCBRunRobin = pDCB;
2088 } else {
2089 pACB->pLastDCB->pNextDCB = pDCB;
2090 }
2091
2092 pDCB->pNextDCB = pACB->pLinkDCB;
2093 pACB->pLastDCB = pDCB;
2094
2095 pDCB->pDCBACB = pACB;
2096 pDCB->TargetID = id;
2097 pDCB->TargetLUN = lun;
2098
2099 /*
2100 * Some values are for all LUNs: Copy them
2101 * In a clean way: We would have an own structure for a SCSI-ID
2102 */
2103 if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2104 pDCB->DevMode = pDCB2->DevMode;
2105 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2106 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2107 pDCB->SyncOffset = pDCB2->SyncOffset;
2108 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2109
2110 pDCB->CtrlR3 = pDCB2->CtrlR3;
2111 pDCB->CtrlR4 = pDCB2->CtrlR4;
2112 } else {
2113 u8 index = pACB->AdapterIndex;
2114 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2115
2116 pDCB->DevMode = prom->EE_MODE1;
2117 pDCB->NegoPeriod =
2118 (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2119 pDCB->CtrlR3 = FAST_CLK;
2120 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2121 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2122 pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2123 }
2124
2125 if (pDCB->DevMode & SYNC_NEGO_)
2126 pDCB->SyncMode |= SYNC_ENABLE;
2127 else {
2128 pDCB->SyncMode = 0;
2129 pDCB->SyncOffset &= ~0x0f;
2130 }
2131
2132 pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2133 if (pDCB->DevMode & PARITY_CHK_)
2134 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2135
2136 pACB->scan_devices = 1;
2137 scsi_device->hostdata = pDCB;
2138 return 0;
2139 }
2140
2141 /**
2142 * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2143 * device that is going away.
2144 *
2145 * @scsi_device: The scsi device that we need to remove.
2146 */
2147 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2148 {
2149 struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2150 struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2151 struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2152
2153 pACB->scan_devices = 0;
2154
2155 BUG_ON(pDCB->GoingSRBCnt > 1);
2156
2157 if (pDCB == pACB->pLinkDCB) {
2158 if (pACB->pLastDCB == pDCB) {
2159 pDCB->pNextDCB = NULL;
2160 pACB->pLastDCB = NULL;
2161 }
2162 pACB->pLinkDCB = pDCB->pNextDCB;
2163 } else {
2164 while (pPrevDCB->pNextDCB != pDCB)
2165 pPrevDCB = pPrevDCB->pNextDCB;
2166 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2167 if (pDCB == pACB->pLastDCB)
2168 pACB->pLastDCB = pPrevDCB;
2169 }
2170
2171 if (pDCB == pACB->pActiveDCB)
2172 pACB->pActiveDCB = NULL;
2173 if (pDCB == pACB->pLinkDCB)
2174 pACB->pLinkDCB = pDCB->pNextDCB;
2175 if (pDCB == pACB->pDCBRunRobin)
2176 pACB->pDCBRunRobin = pDCB->pNextDCB;
2177 kfree(pDCB);
2178
2179 pACB->DCBCnt--;
2180 }
2181
2182 static int dc390_slave_configure(struct scsi_device *sdev)
2183 {
2184 struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2185 struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2186
2187 acb->scan_devices = 0;
2188
2189 /*
2190 * XXX: Note that while this driver used to called scsi_activate_tcq,
2191 * it never actually set a tag type, so emulate the old behavior.
2192 */
2193 scsi_set_tag_type(sdev, 0);
2194
2195 if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2196 dcb->SyncMode |= EN_TAG_QUEUEING;
2197 scsi_adjust_queue_depth(sdev, acb->TagMaxNum);
2198 }
2199
2200 return 0;
2201 }
2202
2203 static struct scsi_host_template driver_template = {
2204 .module = THIS_MODULE,
2205 .proc_name = "tmscsim",
2206 .name = DC390_BANNER " V" DC390_VERSION,
2207 .slave_alloc = dc390_slave_alloc,
2208 .slave_configure = dc390_slave_configure,
2209 .slave_destroy = dc390_slave_destroy,
2210 .queuecommand = DC390_queuecommand,
2211 .eh_abort_handler = DC390_abort,
2212 .eh_bus_reset_handler = DC390_bus_reset,
2213 .can_queue = 1,
2214 .this_id = 7,
2215 .sg_tablesize = SG_ALL,
2216 .cmd_per_lun = 1,
2217 .use_clustering = ENABLE_CLUSTERING,
2218 .max_sectors = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2219 .use_blk_tags = 1,
2220 };
2221
2222 /***********************************************************************
2223 * Functions for access to DC390 EEPROM
2224 * and some to emulate it
2225 *
2226 **********************************************************************/
2227
2228 static void dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2229 {
2230 u8 carryFlag = 1, j = 0x80, bval;
2231 int i;
2232
2233 for (i = 0; i < 9; i++) {
2234 if (carryFlag) {
2235 pci_write_config_byte(pdev, 0x80, 0x40);
2236 bval = 0xc0;
2237 } else
2238 bval = 0x80;
2239
2240 udelay(160);
2241 pci_write_config_byte(pdev, 0x80, bval);
2242 udelay(160);
2243 pci_write_config_byte(pdev, 0x80, 0);
2244 udelay(160);
2245
2246 carryFlag = (cmd & j) ? 1 : 0;
2247 j >>= 1;
2248 }
2249 }
2250
2251 static u16 dc390_eeprom_get_data(struct pci_dev *pdev)
2252 {
2253 int i;
2254 u16 wval = 0;
2255 u8 bval;
2256
2257 for (i = 0; i < 16; i++) {
2258 wval <<= 1;
2259
2260 pci_write_config_byte(pdev, 0x80, 0x80);
2261 udelay(160);
2262 pci_write_config_byte(pdev, 0x80, 0x40);
2263 udelay(160);
2264 pci_read_config_byte(pdev, 0x00, &bval);
2265
2266 if (bval == 0x22)
2267 wval |= 1;
2268 }
2269
2270 return wval;
2271 }
2272
2273 static void dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2274 {
2275 u8 cmd = EEPROM_READ, i;
2276
2277 for (i = 0; i < 0x40; i++) {
2278 pci_write_config_byte(pdev, 0xc0, 0);
2279 udelay(160);
2280
2281 dc390_eeprom_prepare_read(pdev, cmd++);
2282 *ptr++ = dc390_eeprom_get_data(pdev);
2283
2284 pci_write_config_byte(pdev, 0x80, 0);
2285 pci_write_config_byte(pdev, 0x80, 0);
2286 udelay(160);
2287 }
2288 }
2289
2290 /* Override EEprom values with explicitly set values */
2291 static void dc390_eeprom_override(u8 index)
2292 {
2293 u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2294
2295 /* Adapter Settings */
2296 if (tmscsim[0] != -2)
2297 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2298 if (tmscsim[3] != -2)
2299 ptr[EE_MODE2] = (u8)tmscsim[3];
2300 if (tmscsim[5] != -2)
2301 ptr[EE_DELAY] = tmscsim[5]; /* Reset delay */
2302 if (tmscsim[4] != -2)
2303 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4]; /* Tagged Cmds */
2304
2305 /* Device Settings */
2306 for (id = 0; id < MAX_SCSI_ID; id++) {
2307 if (tmscsim[2] != -2)
2308 ptr[id << 2] = (u8)tmscsim[2]; /* EE_MODE1 */
2309 if (tmscsim[1] != -2)
2310 ptr[(id << 2) + 1] = (u8)tmscsim[1]; /* EE_Speed */
2311 }
2312 }
2313
2314 static int tmscsim_def[] = {
2315 7,
2316 0 /* 10MHz */,
2317 PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2318 MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2319 3 /* 16 Tags per LUN */,
2320 1 /* s delay after Reset */,
2321 };
2322
2323 /* Copy defaults over set values where missing */
2324 static void dc390_fill_with_defaults (void)
2325 {
2326 int i;
2327
2328 for (i = 0; i < 6; i++) {
2329 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2330 tmscsim[i] = tmscsim_def[i];
2331 }
2332
2333 /* Sanity checks */
2334 if (tmscsim[0] > 7)
2335 tmscsim[0] = 7;
2336 if (tmscsim[1] > 7)
2337 tmscsim[1] = 4;
2338 if (tmscsim[4] > 5)
2339 tmscsim[4] = 4;
2340 if (tmscsim[5] > 180)
2341 tmscsim[5] = 180;
2342 }
2343
2344 static void dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2345 {
2346 u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2347 u8 EEbuf[128];
2348 u16 *ptr = (u16 *)EEbuf, wval = 0;
2349 int i;
2350
2351 dc390_read_eeprom(pdev, ptr);
2352 memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2353 memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2354 &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2355
2356 dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2357
2358 for (i = 0; i < 0x40; i++, ptr++)
2359 wval += *ptr;
2360
2361 /* no Tekram EEprom found */
2362 if (wval != 0x1234) {
2363 int speed;
2364
2365 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2366
2367 /*
2368 * XXX(hch): bogus, because we might have tekram and
2369 * non-tekram hbas in a single machine.
2370 */
2371 dc390_fill_with_defaults();
2372
2373 speed = dc390_clock_speed[tmscsim[1]];
2374 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2375 "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2376 tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2377 (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2378 }
2379 }
2380
2381 static void dc390_init_hw(struct dc390_acb *pACB, u8 index)
2382 {
2383 struct Scsi_Host *shost = pACB->pScsiHost;
2384 u8 dstate;
2385
2386 /* Disable SCSI bus reset interrupt */
2387 DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2388
2389 if (pACB->Gmode2 & RST_SCSI_BUS) {
2390 dc390_ResetSCSIBus(pACB);
2391 udelay(1000);
2392 pACB->last_reset = jiffies + HZ/2 +
2393 HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2394 }
2395
2396 pACB->ACBFlag = 0;
2397
2398 /* Reset Pending INT */
2399 DC390_read8(INT_Status);
2400
2401 /* 250ms selection timeout */
2402 DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2403
2404 /* Conversion factor = 0 , 40MHz clock */
2405 DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2406
2407 /* NOP cmd - clear command register */
2408 DC390_write8(ScsiCmd, NOP_CMD);
2409
2410 /* Enable Feature and SCSI-2 */
2411 DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2412
2413 /* Fast clock */
2414 DC390_write8(CtrlReg3, FAST_CLK);
2415
2416 /* Negation */
2417 DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2418 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2419 NEGATE_REQACKDATA : 0);
2420
2421 /* Clear Transfer Count High: ID */
2422 DC390_write8(CtcReg_High, 0);
2423 DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2424 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2425 DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2426
2427 dstate = DC390_read8(DMA_Status);
2428 DC390_write8(DMA_Status, dstate);
2429 }
2430
2431 static int dc390_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2432 {
2433 struct dc390_acb *pACB;
2434 struct Scsi_Host *shost;
2435 unsigned long io_port;
2436 int error = -ENODEV, i;
2437
2438 if (pci_enable_device(pdev))
2439 goto out;
2440
2441 pci_set_master(pdev);
2442
2443 error = -ENOMEM;
2444 if (disable_clustering)
2445 driver_template.use_clustering = DISABLE_CLUSTERING;
2446 shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2447 if (!shost)
2448 goto out_disable_device;
2449
2450 pACB = (struct dc390_acb *)shost->hostdata;
2451 memset(pACB, 0, sizeof(struct dc390_acb));
2452
2453 dc390_check_eeprom(pdev, dc390_adapterCnt);
2454 dc390_eeprom_override(dc390_adapterCnt);
2455
2456 io_port = pci_resource_start(pdev, 0);
2457
2458 shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2459 shost->io_port = io_port;
2460 shost->n_io_port = 0x80;
2461 shost->irq = pdev->irq;
2462 shost->base = io_port;
2463 shost->unique_id = io_port;
2464
2465 pACB->last_reset = jiffies;
2466 pACB->pScsiHost = shost;
2467 pACB->IOPortBase = (u16) io_port;
2468 pACB->IRQLevel = pdev->irq;
2469
2470 shost->max_id = 8;
2471
2472 if (shost->max_id - 1 ==
2473 dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2474 shost->max_id--;
2475
2476 if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2477 shost->max_lun = 8;
2478 else
2479 shost->max_lun = 1;
2480
2481 pACB->pFreeSRB = pACB->SRB_array;
2482 pACB->SRBCount = MAX_SRB_CNT;
2483 pACB->AdapterIndex = dc390_adapterCnt;
2484 pACB->TagMaxNum =
2485 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2486 pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2487
2488 for (i = 0; i < pACB->SRBCount-1; i++)
2489 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2490 pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2491 pACB->pTmpSRB = &pACB->TmpSRB;
2492
2493 pACB->sel_timeout = SEL_TIMEOUT;
2494 pACB->glitch_cfg = EATER_25NS;
2495 pACB->pdev = pdev;
2496
2497 if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2498 printk(KERN_ERR "DC390: register IO ports error!\n");
2499 goto out_host_put;
2500 }
2501
2502 /* Reset Pending INT */
2503 DC390_read8_(INT_Status, io_port);
2504
2505 if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2506 "tmscsim", pACB)) {
2507 printk(KERN_ERR "DC390: register IRQ error!\n");
2508 goto out_release_region;
2509 }
2510
2511 dc390_init_hw(pACB, dc390_adapterCnt);
2512
2513 dc390_adapterCnt++;
2514
2515 pci_set_drvdata(pdev, shost);
2516
2517 error = scsi_add_host(shost, &pdev->dev);
2518 if (error)
2519 goto out_free_irq;
2520 scsi_scan_host(shost);
2521 return 0;
2522
2523 out_free_irq:
2524 free_irq(pdev->irq, pACB);
2525 out_release_region:
2526 release_region(io_port, shost->n_io_port);
2527 out_host_put:
2528 scsi_host_put(shost);
2529 out_disable_device:
2530 pci_disable_device(pdev);
2531 out:
2532 return error;
2533 }
2534
2535 /**
2536 * dc390_remove_one - Called to remove a single instance of the adapter.
2537 *
2538 * @dev: The PCI device to remove.
2539 */
2540 static void dc390_remove_one(struct pci_dev *dev)
2541 {
2542 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2543 unsigned long iflags;
2544 struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2545 u8 bval;
2546
2547 scsi_remove_host(scsi_host);
2548
2549 spin_lock_irqsave(scsi_host->host_lock, iflags);
2550 pACB->ACBFlag = RESET_DEV;
2551 bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2552 DC390_write8 (CtrlReg1, bval); /* disable interrupt */
2553 if (pACB->Gmode2 & RST_SCSI_BUS)
2554 dc390_ResetSCSIBus(pACB);
2555 spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2556
2557 free_irq(scsi_host->irq, pACB);
2558 release_region(scsi_host->io_port, scsi_host->n_io_port);
2559
2560 pci_disable_device(dev);
2561 scsi_host_put(scsi_host);
2562 }
2563
2564 static struct pci_device_id tmscsim_pci_tbl[] = {
2565 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2566 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2567 { }
2568 };
2569 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2570
2571 static struct pci_driver dc390_driver = {
2572 .name = "tmscsim",
2573 .id_table = tmscsim_pci_tbl,
2574 .probe = dc390_probe_one,
2575 .remove = dc390_remove_one,
2576 };
2577
2578 static int __init dc390_module_init(void)
2579 {
2580 if (!disable_clustering) {
2581 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n");
2582 printk(KERN_INFO " with \"disable_clustering=1\" and report to maintainers\n");
2583 }
2584
2585 if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2586 tmscsim[0] = 7;
2587 tmscsim[1] = 4;
2588 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2589 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2590 tmscsim[4] = 2;
2591 tmscsim[5] = 10;
2592 printk (KERN_INFO "DC390: Using safe settings.\n");
2593 }
2594
2595 return pci_register_driver(&dc390_driver);
2596 }
2597
2598 static void __exit dc390_module_exit(void)
2599 {
2600 pci_unregister_driver(&dc390_driver);
2601 }
2602
2603 module_init(dc390_module_init);
2604 module_exit(dc390_module_exit);
2605
2606 #ifndef MODULE
2607 static int __init dc390_setup (char *str)
2608 {
2609 int ints[8],i, im;
2610
2611 get_options(str, ARRAY_SIZE(ints), ints);
2612 im = ints[0];
2613
2614 if (im > 6) {
2615 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2616 im = 6;
2617 }
2618
2619 for (i = 0; i < im; i++)
2620 tmscsim[i] = ints[i+1];
2621 /* dc390_checkparams (); */
2622 return 1;
2623 }
2624
2625 __setup("tmscsim=", dc390_setup);
2626 #endif
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