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102#define NCR_700_VERSION "2.8"
103
104#include <linux/kernel.h>
105#include <linux/types.h>
106#include <linux/string.h>
107#include <linux/slab.h>
108#include <linux/ioport.h>
109#include <linux/delay.h>
110#include <linux/spinlock.h>
111#include <linux/completion.h>
112#include <linux/init.h>
113#include <linux/proc_fs.h>
114#include <linux/blkdev.h>
115#include <linux/module.h>
116#include <linux/interrupt.h>
117#include <linux/device.h>
118#include <linux/pgtable.h>
119#include <asm/dma.h>
120#include <asm/io.h>
121#include <asm/byteorder.h>
122
123#include <scsi/scsi.h>
124#include <scsi/scsi_cmnd.h>
125#include <scsi/scsi_dbg.h>
126#include <scsi/scsi_eh.h>
127#include <scsi/scsi_host.h>
128#include <scsi/scsi_tcq.h>
129#include <scsi/scsi_transport.h>
130#include <scsi/scsi_transport_spi.h>
131
132#include "53c700.h"
133
134
135
136
137
138
139
140#define to32bit(x) ((__u32)((unsigned long)(x)))
141
142#ifdef NCR_700_DEBUG
143#define STATIC
144#else
145#define STATIC static
146#endif
147
148MODULE_AUTHOR("James Bottomley");
149MODULE_DESCRIPTION("53c700 and 53c700-66 Driver");
150MODULE_LICENSE("GPL");
151
152
153#include "53c700_d.h"
154
155
156STATIC int NCR_700_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *);
157STATIC int NCR_700_abort(struct scsi_cmnd * SCpnt);
158STATIC int NCR_700_host_reset(struct scsi_cmnd * SCpnt);
159STATIC void NCR_700_chip_setup(struct Scsi_Host *host);
160STATIC void NCR_700_chip_reset(struct Scsi_Host *host);
161STATIC int NCR_700_slave_alloc(struct scsi_device *SDpnt);
162STATIC int NCR_700_slave_configure(struct scsi_device *SDpnt);
163STATIC void NCR_700_slave_destroy(struct scsi_device *SDpnt);
164static int NCR_700_change_queue_depth(struct scsi_device *SDpnt, int depth);
165
166STATIC struct device_attribute *NCR_700_dev_attrs[];
167
168STATIC struct scsi_transport_template *NCR_700_transport_template = NULL;
169
170static char *NCR_700_phase[] = {
171 "",
172 "after selection",
173 "before command phase",
174 "after command phase",
175 "after status phase",
176 "after data in phase",
177 "after data out phase",
178 "during data phase",
179};
180
181static char *NCR_700_condition[] = {
182 "",
183 "NOT MSG_OUT",
184 "UNEXPECTED PHASE",
185 "NOT MSG_IN",
186 "UNEXPECTED MSG",
187 "MSG_IN",
188 "SDTR_MSG RECEIVED",
189 "REJECT_MSG RECEIVED",
190 "DISCONNECT_MSG RECEIVED",
191 "MSG_OUT",
192 "DATA_IN",
193
194};
195
196static char *NCR_700_fatal_messages[] = {
197 "unexpected message after reselection",
198 "still MSG_OUT after message injection",
199 "not MSG_IN after selection",
200 "Illegal message length received",
201};
202
203static char *NCR_700_SBCL_bits[] = {
204 "IO ",
205 "CD ",
206 "MSG ",
207 "ATN ",
208 "SEL ",
209 "BSY ",
210 "ACK ",
211 "REQ ",
212};
213
214static char *NCR_700_SBCL_to_phase[] = {
215 "DATA_OUT",
216 "DATA_IN",
217 "CMD_OUT",
218 "STATE",
219 "ILLEGAL PHASE",
220 "ILLEGAL PHASE",
221 "MSG OUT",
222 "MSG IN",
223};
224
225
226
227
228
229
230static inline __u8
231NCR_700_offset_period_to_sxfer(struct NCR_700_Host_Parameters *hostdata,
232 __u8 offset, __u8 period)
233{
234 int XFERP;
235
236 __u8 min_xferp = (hostdata->chip710
237 ? NCR_710_MIN_XFERP : NCR_700_MIN_XFERP);
238 __u8 max_offset = (hostdata->chip710
239 ? NCR_710_MAX_OFFSET : NCR_700_MAX_OFFSET);
240
241 if(offset == 0)
242 return 0;
243
244 if(period < hostdata->min_period) {
245 printk(KERN_WARNING "53c700: Period %dns is less than this chip's minimum, setting to %d\n", period*4, NCR_700_MIN_PERIOD*4);
246 period = hostdata->min_period;
247 }
248 XFERP = (period*4 * hostdata->sync_clock)/1000 - 4;
249 if(offset > max_offset) {
250 printk(KERN_WARNING "53c700: Offset %d exceeds chip maximum, setting to %d\n",
251 offset, max_offset);
252 offset = max_offset;
253 }
254 if(XFERP < min_xferp) {
255 XFERP = min_xferp;
256 }
257 return (offset & 0x0f) | (XFERP & 0x07)<<4;
258}
259
260static inline __u8
261NCR_700_get_SXFER(struct scsi_device *SDp)
262{
263 struct NCR_700_Host_Parameters *hostdata =
264 (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
265
266 return NCR_700_offset_period_to_sxfer(hostdata,
267 spi_offset(SDp->sdev_target),
268 spi_period(SDp->sdev_target));
269}
270
271static inline dma_addr_t virt_to_dma(struct NCR_700_Host_Parameters *h, void *p)
272{
273 return h->pScript + ((uintptr_t)p - (uintptr_t)h->script);
274}
275
276static inline void dma_sync_to_dev(struct NCR_700_Host_Parameters *h,
277 void *addr, size_t size)
278{
279 if (h->noncoherent)
280 dma_sync_single_for_device(h->dev, virt_to_dma(h, addr),
281 size, DMA_BIDIRECTIONAL);
282}
283
284static inline void dma_sync_from_dev(struct NCR_700_Host_Parameters *h,
285 void *addr, size_t size)
286{
287 if (h->noncoherent)
288 dma_sync_single_for_device(h->dev, virt_to_dma(h, addr), size,
289 DMA_BIDIRECTIONAL);
290}
291
292struct Scsi_Host *
293NCR_700_detect(struct scsi_host_template *tpnt,
294 struct NCR_700_Host_Parameters *hostdata, struct device *dev)
295{
296 dma_addr_t pScript, pSlots;
297 __u8 *memory;
298 __u32 *script;
299 struct Scsi_Host *host;
300 static int banner = 0;
301 int j;
302
303 if(tpnt->sdev_attrs == NULL)
304 tpnt->sdev_attrs = NCR_700_dev_attrs;
305
306 memory = dma_alloc_coherent(dev, TOTAL_MEM_SIZE, &pScript, GFP_KERNEL);
307 if (!memory) {
308 hostdata->noncoherent = 1;
309 memory = dma_alloc_noncoherent(dev, TOTAL_MEM_SIZE, &pScript,
310 DMA_BIDIRECTIONAL, GFP_KERNEL);
311 }
312 if (!memory) {
313 printk(KERN_ERR "53c700: Failed to allocate memory for driver, detaching\n");
314 return NULL;
315 }
316
317 script = (__u32 *)memory;
318 hostdata->msgin = memory + MSGIN_OFFSET;
319 hostdata->msgout = memory + MSGOUT_OFFSET;
320 hostdata->status = memory + STATUS_OFFSET;
321 hostdata->slots = (struct NCR_700_command_slot *)(memory + SLOTS_OFFSET);
322 hostdata->dev = dev;
323
324 pSlots = pScript + SLOTS_OFFSET;
325
326
327 tpnt->queuecommand = NCR_700_queuecommand;
328 tpnt->eh_abort_handler = NCR_700_abort;
329 tpnt->eh_host_reset_handler = NCR_700_host_reset;
330 tpnt->can_queue = NCR_700_COMMAND_SLOTS_PER_HOST;
331 tpnt->sg_tablesize = NCR_700_SG_SEGMENTS;
332 tpnt->cmd_per_lun = NCR_700_CMD_PER_LUN;
333 tpnt->slave_configure = NCR_700_slave_configure;
334 tpnt->slave_destroy = NCR_700_slave_destroy;
335 tpnt->slave_alloc = NCR_700_slave_alloc;
336 tpnt->change_queue_depth = NCR_700_change_queue_depth;
337
338 if(tpnt->name == NULL)
339 tpnt->name = "53c700";
340 if(tpnt->proc_name == NULL)
341 tpnt->proc_name = "53c700";
342
343 host = scsi_host_alloc(tpnt, 4);
344 if (!host)
345 return NULL;
346 memset(hostdata->slots, 0, sizeof(struct NCR_700_command_slot)
347 * NCR_700_COMMAND_SLOTS_PER_HOST);
348 for (j = 0; j < NCR_700_COMMAND_SLOTS_PER_HOST; j++) {
349 dma_addr_t offset = (dma_addr_t)((unsigned long)&hostdata->slots[j].SG[0]
350 - (unsigned long)&hostdata->slots[0].SG[0]);
351 hostdata->slots[j].pSG = (struct NCR_700_SG_List *)((unsigned long)(pSlots + offset));
352 if(j == 0)
353 hostdata->free_list = &hostdata->slots[j];
354 else
355 hostdata->slots[j-1].ITL_forw = &hostdata->slots[j];
356 hostdata->slots[j].state = NCR_700_SLOT_FREE;
357 }
358
359 for (j = 0; j < ARRAY_SIZE(SCRIPT); j++)
360 script[j] = bS_to_host(SCRIPT[j]);
361
362
363 for (j = 0; j < PATCHES; j++)
364 script[LABELPATCHES[j]] = bS_to_host(pScript + SCRIPT[LABELPATCHES[j]]);
365
366 script_patch_32(hostdata, script, MessageLocation,
367 pScript + MSGOUT_OFFSET);
368 script_patch_32(hostdata, script, StatusAddress,
369 pScript + STATUS_OFFSET);
370 script_patch_32(hostdata, script, ReceiveMsgAddress,
371 pScript + MSGIN_OFFSET);
372
373 hostdata->script = script;
374 hostdata->pScript = pScript;
375 dma_sync_single_for_device(hostdata->dev, pScript, sizeof(SCRIPT), DMA_TO_DEVICE);
376 hostdata->state = NCR_700_HOST_FREE;
377 hostdata->cmd = NULL;
378 host->max_id = 8;
379 host->max_lun = NCR_700_MAX_LUNS;
380 BUG_ON(NCR_700_transport_template == NULL);
381 host->transportt = NCR_700_transport_template;
382 host->unique_id = (unsigned long)hostdata->base;
383 hostdata->eh_complete = NULL;
384 host->hostdata[0] = (unsigned long)hostdata;
385
386 NCR_700_writeb(0xff, host, CTEST9_REG);
387 if (hostdata->chip710)
388 hostdata->rev = (NCR_700_readb(host, CTEST8_REG)>>4) & 0x0f;
389 else
390 hostdata->rev = (NCR_700_readb(host, CTEST7_REG)>>4) & 0x0f;
391 hostdata->fast = (NCR_700_readb(host, CTEST9_REG) == 0);
392 if (banner == 0) {
393 printk(KERN_NOTICE "53c700: Version " NCR_700_VERSION " By James.Bottomley@HansenPartnership.com\n");
394 banner = 1;
395 }
396 printk(KERN_NOTICE "scsi%d: %s rev %d %s\n", host->host_no,
397 hostdata->chip710 ? "53c710" :
398 (hostdata->fast ? "53c700-66" : "53c700"),
399 hostdata->rev, hostdata->differential ?
400 "(Differential)" : "");
401
402 NCR_700_chip_reset(host);
403
404 if (scsi_add_host(host, dev)) {
405 dev_printk(KERN_ERR, dev, "53c700: scsi_add_host failed\n");
406 scsi_host_put(host);
407 return NULL;
408 }
409
410 spi_signalling(host) = hostdata->differential ? SPI_SIGNAL_HVD :
411 SPI_SIGNAL_SE;
412
413 return host;
414}
415
416int
417NCR_700_release(struct Scsi_Host *host)
418{
419 struct NCR_700_Host_Parameters *hostdata =
420 (struct NCR_700_Host_Parameters *)host->hostdata[0];
421
422 if (hostdata->noncoherent)
423 dma_free_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
424 hostdata->script, hostdata->pScript,
425 DMA_BIDIRECTIONAL);
426 else
427 dma_free_coherent(hostdata->dev, TOTAL_MEM_SIZE,
428 hostdata->script, hostdata->pScript);
429 return 1;
430}
431
432static inline __u8
433NCR_700_identify(int can_disconnect, __u8 lun)
434{
435 return IDENTIFY_BASE |
436 ((can_disconnect) ? 0x40 : 0) |
437 (lun & NCR_700_LUN_MASK);
438}
439
440
441
442
443
444
445
446
447
448
449
450static inline int
451NCR_700_data_residual (struct Scsi_Host *host) {
452 struct NCR_700_Host_Parameters *hostdata =
453 (struct NCR_700_Host_Parameters *)host->hostdata[0];
454 int count, synchronous = 0;
455 unsigned int ddir;
456
457 if(hostdata->chip710) {
458 count = ((NCR_700_readb(host, DFIFO_REG) & 0x7f) -
459 (NCR_700_readl(host, DBC_REG) & 0x7f)) & 0x7f;
460 } else {
461 count = ((NCR_700_readb(host, DFIFO_REG) & 0x3f) -
462 (NCR_700_readl(host, DBC_REG) & 0x3f)) & 0x3f;
463 }
464
465 if(hostdata->fast)
466 synchronous = NCR_700_readb(host, SXFER_REG) & 0x0f;
467
468
469 ddir = NCR_700_readb(host, CTEST0_REG) & 0x01;
470
471 if (ddir) {
472
473 if (synchronous)
474 count += (NCR_700_readb(host, SSTAT2_REG) & 0xf0) >> 4;
475 else
476 if (NCR_700_readb(host, SSTAT1_REG) & SIDL_REG_FULL)
477 ++count;
478 } else {
479
480 __u8 sstat = NCR_700_readb(host, SSTAT1_REG);
481 if (sstat & SODL_REG_FULL)
482 ++count;
483 if (synchronous && (sstat & SODR_REG_FULL))
484 ++count;
485 }
486#ifdef NCR_700_DEBUG
487 if(count)
488 printk("RESIDUAL IS %d (ddir %d)\n", count, ddir);
489#endif
490 return count;
491}
492
493
494
495static inline char *
496sbcl_to_string(__u8 sbcl)
497{
498 int i;
499 static char ret[256];
500
501 ret[0]='\0';
502 for(i=0; i<8; i++) {
503 if((1<<i) & sbcl)
504 strcat(ret, NCR_700_SBCL_bits[i]);
505 }
506 strcat(ret, NCR_700_SBCL_to_phase[sbcl & 0x07]);
507 return ret;
508}
509
510static inline __u8
511bitmap_to_number(__u8 bitmap)
512{
513 __u8 i;
514
515 for(i=0; i<8 && !(bitmap &(1<<i)); i++)
516 ;
517 return i;
518}
519
520
521STATIC struct NCR_700_command_slot *
522find_empty_slot(struct NCR_700_Host_Parameters *hostdata)
523{
524 struct NCR_700_command_slot *slot = hostdata->free_list;
525
526 if(slot == NULL) {
527
528 if(hostdata->command_slot_count != NCR_700_COMMAND_SLOTS_PER_HOST)
529 printk(KERN_ERR "SLOTS FULL, but count is %d, should be %d\n", hostdata->command_slot_count, NCR_700_COMMAND_SLOTS_PER_HOST);
530 return NULL;
531 }
532
533 if(slot->state != NCR_700_SLOT_FREE)
534
535 printk(KERN_ERR "BUSY SLOT ON FREE LIST!!!\n");
536
537
538 hostdata->free_list = slot->ITL_forw;
539 slot->ITL_forw = NULL;
540
541
542
543
544
545
546 slot->state = NCR_700_SLOT_BUSY;
547 slot->flags = 0;
548 hostdata->command_slot_count++;
549
550 return slot;
551}
552
553STATIC void
554free_slot(struct NCR_700_command_slot *slot,
555 struct NCR_700_Host_Parameters *hostdata)
556{
557 if((slot->state & NCR_700_SLOT_MASK) != NCR_700_SLOT_MAGIC) {
558 printk(KERN_ERR "53c700: SLOT %p is not MAGIC!!!\n", slot);
559 }
560 if(slot->state == NCR_700_SLOT_FREE) {
561 printk(KERN_ERR "53c700: SLOT %p is FREE!!!\n", slot);
562 }
563
564 slot->resume_offset = 0;
565 slot->cmnd = NULL;
566 slot->state = NCR_700_SLOT_FREE;
567 slot->ITL_forw = hostdata->free_list;
568 hostdata->free_list = slot;
569 hostdata->command_slot_count--;
570}
571
572
573
574
575STATIC void
576save_for_reselection(struct NCR_700_Host_Parameters *hostdata,
577 struct scsi_cmnd *SCp, __u32 dsp)
578{
579
580 if(SCp != NULL) {
581 struct NCR_700_command_slot *slot =
582 (struct NCR_700_command_slot *)SCp->host_scribble;
583
584 slot->resume_offset = dsp;
585 }
586 hostdata->state = NCR_700_HOST_FREE;
587 hostdata->cmd = NULL;
588}
589
590STATIC inline void
591NCR_700_unmap(struct NCR_700_Host_Parameters *hostdata, struct scsi_cmnd *SCp,
592 struct NCR_700_command_slot *slot)
593{
594 if(SCp->sc_data_direction != DMA_NONE &&
595 SCp->sc_data_direction != DMA_BIDIRECTIONAL)
596 scsi_dma_unmap(SCp);
597}
598
599STATIC inline void
600NCR_700_scsi_done(struct NCR_700_Host_Parameters *hostdata,
601 struct scsi_cmnd *SCp, int result)
602{
603 hostdata->state = NCR_700_HOST_FREE;
604 hostdata->cmd = NULL;
605
606 if(SCp != NULL) {
607 struct NCR_700_command_slot *slot =
608 (struct NCR_700_command_slot *)SCp->host_scribble;
609
610 dma_unmap_single(hostdata->dev, slot->pCmd,
611 MAX_COMMAND_SIZE, DMA_TO_DEVICE);
612 if (slot->flags == NCR_700_FLAG_AUTOSENSE) {
613 char *cmnd = NCR_700_get_sense_cmnd(SCp->device);
614
615 dma_unmap_single(hostdata->dev, slot->dma_handle,
616 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
617
618
619 if (result == 0)
620 result = cmnd[7];
621
622 SCp->cmd_len = cmnd[8];
623 } else
624 NCR_700_unmap(hostdata, SCp, slot);
625
626 free_slot(slot, hostdata);
627#ifdef NCR_700_DEBUG
628 if(NCR_700_get_depth(SCp->device) == 0 ||
629 NCR_700_get_depth(SCp->device) > SCp->device->queue_depth)
630 printk(KERN_ERR "Invalid depth in NCR_700_scsi_done(): %d\n",
631 NCR_700_get_depth(SCp->device));
632#endif
633 NCR_700_set_depth(SCp->device, NCR_700_get_depth(SCp->device) - 1);
634
635 SCp->host_scribble = NULL;
636 SCp->result = result;
637 SCp->scsi_done(SCp);
638 } else {
639 printk(KERN_ERR "53c700: SCSI DONE HAS NULL SCp\n");
640 }
641}
642
643
644STATIC void
645NCR_700_internal_bus_reset(struct Scsi_Host *host)
646{
647
648 NCR_700_writeb(ASSERT_RST, host, SCNTL1_REG);
649 udelay(50);
650 NCR_700_writeb(0, host, SCNTL1_REG);
651
652}
653
654STATIC void
655NCR_700_chip_setup(struct Scsi_Host *host)
656{
657 struct NCR_700_Host_Parameters *hostdata =
658 (struct NCR_700_Host_Parameters *)host->hostdata[0];
659 __u8 min_period;
660 __u8 min_xferp = (hostdata->chip710 ? NCR_710_MIN_XFERP : NCR_700_MIN_XFERP);
661
662 if(hostdata->chip710) {
663 __u8 burst_disable = 0;
664 __u8 burst_length = 0;
665
666 switch (hostdata->burst_length) {
667 case 1:
668 burst_length = BURST_LENGTH_1;
669 break;
670 case 2:
671 burst_length = BURST_LENGTH_2;
672 break;
673 case 4:
674 burst_length = BURST_LENGTH_4;
675 break;
676 case 8:
677 burst_length = BURST_LENGTH_8;
678 break;
679 default:
680 burst_disable = BURST_DISABLE;
681 break;
682 }
683 hostdata->dcntl_extra |= COMPAT_700_MODE;
684
685 NCR_700_writeb(hostdata->dcntl_extra, host, DCNTL_REG);
686 NCR_700_writeb(burst_length | hostdata->dmode_extra,
687 host, DMODE_710_REG);
688 NCR_700_writeb(burst_disable | hostdata->ctest7_extra |
689 (hostdata->differential ? DIFF : 0),
690 host, CTEST7_REG);
691 NCR_700_writeb(BTB_TIMER_DISABLE, host, CTEST0_REG);
692 NCR_700_writeb(FULL_ARBITRATION | ENABLE_PARITY | PARITY
693 | AUTO_ATN, host, SCNTL0_REG);
694 } else {
695 NCR_700_writeb(BURST_LENGTH_8 | hostdata->dmode_extra,
696 host, DMODE_700_REG);
697 NCR_700_writeb(hostdata->differential ?
698 DIFF : 0, host, CTEST7_REG);
699 if(hostdata->fast) {
700
701 NCR_700_writeb(LAST_DIS_ENBL | ENABLE_ACTIVE_NEGATION
702 | GENERATE_RECEIVE_PARITY, host,
703 CTEST8_REG);
704 } else {
705 NCR_700_writeb(FULL_ARBITRATION | ENABLE_PARITY
706 | PARITY | AUTO_ATN, host, SCNTL0_REG);
707 }
708 }
709
710 NCR_700_writeb(1 << host->this_id, host, SCID_REG);
711 NCR_700_writeb(0, host, SBCL_REG);
712 NCR_700_writeb(ASYNC_OPERATION, host, SXFER_REG);
713
714 NCR_700_writeb(PHASE_MM_INT | SEL_TIMEOUT_INT | GROSS_ERR_INT | UX_DISC_INT
715 | RST_INT | PAR_ERR_INT | SELECT_INT, host, SIEN_REG);
716
717 NCR_700_writeb(ABORT_INT | INT_INST_INT | ILGL_INST_INT, host, DIEN_REG);
718 NCR_700_writeb(ENABLE_SELECT, host, SCNTL1_REG);
719 if(hostdata->clock > 75) {
720 printk(KERN_ERR "53c700: Clock speed %dMHz is too high: 75Mhz is the maximum this chip can be driven at\n", hostdata->clock);
721
722
723 DEBUG(("53c700: sync 2 async 3\n"));
724 NCR_700_writeb(SYNC_DIV_2_0, host, SBCL_REG);
725 NCR_700_writeb(ASYNC_DIV_3_0 | hostdata->dcntl_extra, host, DCNTL_REG);
726 hostdata->sync_clock = hostdata->clock/2;
727 } else if(hostdata->clock > 50 && hostdata->clock <= 75) {
728
729 DEBUG(("53c700: sync 1.5 async 3\n"));
730 NCR_700_writeb(SYNC_DIV_1_5, host, SBCL_REG);
731 NCR_700_writeb(ASYNC_DIV_3_0 | hostdata->dcntl_extra, host, DCNTL_REG);
732 hostdata->sync_clock = hostdata->clock*2;
733 hostdata->sync_clock /= 3;
734
735 } else if(hostdata->clock > 37 && hostdata->clock <= 50) {
736
737 DEBUG(("53c700: sync 1 async 2\n"));
738 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
739 NCR_700_writeb(ASYNC_DIV_2_0 | hostdata->dcntl_extra, host, DCNTL_REG);
740 hostdata->sync_clock = hostdata->clock;
741 } else if(hostdata->clock > 25 && hostdata->clock <=37) {
742
743 DEBUG(("53c700: sync 1 async 1.5\n"));
744 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
745 NCR_700_writeb(ASYNC_DIV_1_5 | hostdata->dcntl_extra, host, DCNTL_REG);
746 hostdata->sync_clock = hostdata->clock;
747 } else {
748 DEBUG(("53c700: sync 1 async 1\n"));
749 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
750 NCR_700_writeb(ASYNC_DIV_1_0 | hostdata->dcntl_extra, host, DCNTL_REG);
751
752 hostdata->sync_clock = hostdata->clock;
753 }
754
755
756
757
758 min_period = 1000*(4+min_xferp)/(4*hostdata->sync_clock);
759 hostdata->min_period = NCR_700_MIN_PERIOD;
760 if(min_period > NCR_700_MIN_PERIOD)
761 hostdata->min_period = min_period;
762}
763
764STATIC void
765NCR_700_chip_reset(struct Scsi_Host *host)
766{
767 struct NCR_700_Host_Parameters *hostdata =
768 (struct NCR_700_Host_Parameters *)host->hostdata[0];
769 if(hostdata->chip710) {
770 NCR_700_writeb(SOFTWARE_RESET_710, host, ISTAT_REG);
771 udelay(100);
772
773 NCR_700_writeb(0, host, ISTAT_REG);
774 } else {
775 NCR_700_writeb(SOFTWARE_RESET, host, DCNTL_REG);
776 udelay(100);
777
778 NCR_700_writeb(0, host, DCNTL_REG);
779 }
780
781 mdelay(1000);
782
783 NCR_700_chip_setup(host);
784}
785
786
787
788
789
790
791
792STATIC __u32
793process_extended_message(struct Scsi_Host *host,
794 struct NCR_700_Host_Parameters *hostdata,
795 struct scsi_cmnd *SCp, __u32 dsp, __u32 dsps)
796{
797 __u32 resume_offset = dsp, temp = dsp + 8;
798 __u8 pun = 0xff, lun = 0xff;
799
800 if(SCp != NULL) {
801 pun = SCp->device->id;
802 lun = SCp->device->lun;
803 }
804
805 switch(hostdata->msgin[2]) {
806 case A_SDTR_MSG:
807 if(SCp != NULL && NCR_700_is_flag_set(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION)) {
808 struct scsi_target *starget = SCp->device->sdev_target;
809 __u8 period = hostdata->msgin[3];
810 __u8 offset = hostdata->msgin[4];
811
812 if(offset == 0 || period == 0) {
813 offset = 0;
814 period = 0;
815 }
816
817 spi_offset(starget) = offset;
818 spi_period(starget) = period;
819
820 if(NCR_700_is_flag_set(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION)) {
821 spi_display_xfer_agreement(starget);
822 NCR_700_clear_flag(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION);
823 }
824
825 NCR_700_set_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
826 NCR_700_clear_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
827
828 NCR_700_writeb(NCR_700_get_SXFER(SCp->device),
829 host, SXFER_REG);
830
831 } else {
832
833 shost_printk(KERN_WARNING, host,
834 "Unexpected SDTR msg\n");
835 hostdata->msgout[0] = A_REJECT_MSG;
836 dma_sync_to_dev(hostdata, hostdata->msgout, 1);
837 script_patch_16(hostdata, hostdata->script,
838 MessageCount, 1);
839
840
841 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
842 }
843 break;
844
845 case A_WDTR_MSG:
846 printk(KERN_INFO "scsi%d: (%d:%d), Unsolicited WDTR after CMD, Rejecting\n",
847 host->host_no, pun, lun);
848 hostdata->msgout[0] = A_REJECT_MSG;
849 dma_sync_to_dev(hostdata, hostdata->msgout, 1);
850 script_patch_16(hostdata, hostdata->script, MessageCount, 1);
851 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
852
853 break;
854
855 default:
856 printk(KERN_INFO "scsi%d (%d:%d): Unexpected message %s: ",
857 host->host_no, pun, lun,
858 NCR_700_phase[(dsps & 0xf00) >> 8]);
859 spi_print_msg(hostdata->msgin);
860 printk("\n");
861
862 hostdata->msgout[0] = A_REJECT_MSG;
863 dma_sync_to_dev(hostdata, hostdata->msgout, 1);
864 script_patch_16(hostdata, hostdata->script, MessageCount, 1);
865
866
867 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
868 }
869 NCR_700_writel(temp, host, TEMP_REG);
870 return resume_offset;
871}
872
873STATIC __u32
874process_message(struct Scsi_Host *host, struct NCR_700_Host_Parameters *hostdata,
875 struct scsi_cmnd *SCp, __u32 dsp, __u32 dsps)
876{
877
878 __u32 temp = dsp + 8, resume_offset = dsp;
879 __u8 pun = 0xff, lun = 0xff;
880
881 if(SCp != NULL) {
882 pun = SCp->device->id;
883 lun = SCp->device->lun;
884 }
885
886#ifdef NCR_700_DEBUG
887 printk("scsi%d (%d:%d): message %s: ", host->host_no, pun, lun,
888 NCR_700_phase[(dsps & 0xf00) >> 8]);
889 spi_print_msg(hostdata->msgin);
890 printk("\n");
891#endif
892
893 switch(hostdata->msgin[0]) {
894
895 case A_EXTENDED_MSG:
896 resume_offset = process_extended_message(host, hostdata, SCp,
897 dsp, dsps);
898 break;
899
900 case A_REJECT_MSG:
901 if(SCp != NULL && NCR_700_is_flag_set(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION)) {
902
903 spi_period(SCp->device->sdev_target) =
904 spi_offset(SCp->device->sdev_target) = 0;
905 NCR_700_set_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
906 NCR_700_clear_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
907 } else if(SCp != NULL && NCR_700_get_tag_neg_state(SCp->device) == NCR_700_DURING_TAG_NEGOTIATION) {
908
909 scmd_printk(KERN_WARNING, SCp,
910 "Rejected first tag queue attempt, turning off tag queueing\n");
911
912 NCR_700_set_tag_neg_state(SCp->device, NCR_700_FINISHED_TAG_NEGOTIATION);
913 hostdata->tag_negotiated &= ~(1<<scmd_id(SCp));
914
915 SCp->device->tagged_supported = 0;
916 SCp->device->simple_tags = 0;
917 scsi_change_queue_depth(SCp->device, host->cmd_per_lun);
918 } else {
919 shost_printk(KERN_WARNING, host,
920 "(%d:%d) Unexpected REJECT Message %s\n",
921 pun, lun,
922 NCR_700_phase[(dsps & 0xf00) >> 8]);
923
924 }
925 break;
926
927 case A_PARITY_ERROR_MSG:
928 printk(KERN_ERR "scsi%d (%d:%d) Parity Error!\n", host->host_no,
929 pun, lun);
930 NCR_700_internal_bus_reset(host);
931 break;
932 case A_SIMPLE_TAG_MSG:
933 printk(KERN_INFO "scsi%d (%d:%d) SIMPLE TAG %d %s\n", host->host_no,
934 pun, lun, hostdata->msgin[1],
935 NCR_700_phase[(dsps & 0xf00) >> 8]);
936
937 break;
938 default:
939 printk(KERN_INFO "scsi%d (%d:%d): Unexpected message %s: ",
940 host->host_no, pun, lun,
941 NCR_700_phase[(dsps & 0xf00) >> 8]);
942
943 spi_print_msg(hostdata->msgin);
944 printk("\n");
945
946 hostdata->msgout[0] = A_REJECT_MSG;
947 dma_sync_to_dev(hostdata, hostdata->msgout, 1);
948 script_patch_16(hostdata, hostdata->script, MessageCount, 1);
949
950
951 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
952
953 break;
954 }
955 NCR_700_writel(temp, host, TEMP_REG);
956
957 dma_sync_from_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
958 return resume_offset;
959}
960
961STATIC __u32
962process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp,
963 struct Scsi_Host *host,
964 struct NCR_700_Host_Parameters *hostdata)
965{
966 __u32 resume_offset = 0;
967 __u8 pun = 0xff, lun=0xff;
968
969 if(SCp != NULL) {
970 pun = SCp->device->id;
971 lun = SCp->device->lun;
972 }
973
974 if(dsps == A_GOOD_STATUS_AFTER_STATUS) {
975 DEBUG((" COMMAND COMPLETE, status=%02x\n",
976 hostdata->status[0]));
977
978 if (NCR_700_get_tag_neg_state(SCp->device) == NCR_700_DURING_TAG_NEGOTIATION)
979 NCR_700_set_tag_neg_state(SCp->device,
980 NCR_700_FINISHED_TAG_NEGOTIATION);
981
982
983 if (hostdata->status[0] == SAM_STAT_CHECK_CONDITION ||
984 hostdata->status[0] == SAM_STAT_COMMAND_TERMINATED) {
985 struct NCR_700_command_slot *slot =
986 (struct NCR_700_command_slot *)SCp->host_scribble;
987 if(slot->flags == NCR_700_FLAG_AUTOSENSE) {
988
989
990 scmd_printk(KERN_ERR, SCp,
991 "broken device is looping in contingent allegiance: ignoring\n");
992 NCR_700_scsi_done(hostdata, SCp, hostdata->status[0]);
993 } else {
994 char *cmnd =
995 NCR_700_get_sense_cmnd(SCp->device);
996#ifdef NCR_DEBUG
997 scsi_print_command(SCp);
998 printk(" cmd %p has status %d, requesting sense\n",
999 SCp, hostdata->status[0]);
1000#endif
1001
1002
1003
1004
1005
1006
1007
1008 NCR_700_unmap(hostdata, SCp, slot);
1009 dma_unmap_single(hostdata->dev, slot->pCmd,
1010 MAX_COMMAND_SIZE,
1011 DMA_TO_DEVICE);
1012
1013 cmnd[0] = REQUEST_SENSE;
1014 cmnd[1] = (lun & 0x7) << 5;
1015 cmnd[2] = 0;
1016 cmnd[3] = 0;
1017 cmnd[4] = SCSI_SENSE_BUFFERSIZE;
1018 cmnd[5] = 0;
1019
1020
1021
1022
1023
1024
1025 cmnd[6] = NCR_700_INTERNAL_SENSE_MAGIC;
1026 cmnd[7] = hostdata->status[0];
1027 cmnd[8] = SCp->cmd_len;
1028 SCp->cmd_len = 6;
1029
1030 slot->pCmd = dma_map_single(hostdata->dev, cmnd, MAX_COMMAND_SIZE, DMA_TO_DEVICE);
1031 slot->dma_handle = dma_map_single(hostdata->dev, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
1032 slot->SG[0].ins = bS_to_host(SCRIPT_MOVE_DATA_IN | SCSI_SENSE_BUFFERSIZE);
1033 slot->SG[0].pAddr = bS_to_host(slot->dma_handle);
1034 slot->SG[1].ins = bS_to_host(SCRIPT_RETURN);
1035 slot->SG[1].pAddr = 0;
1036 slot->resume_offset = hostdata->pScript;
1037 dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG[0])*2);
1038 dma_sync_from_dev(hostdata, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE);
1039
1040
1041 slot->state = NCR_700_SLOT_QUEUED;
1042 slot->flags = NCR_700_FLAG_AUTOSENSE;
1043 hostdata->state = NCR_700_HOST_FREE;
1044 hostdata->cmd = NULL;
1045 }
1046 } else {
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068 NCR_700_scsi_done(hostdata, SCp, hostdata->status[0]);
1069 }
1070 } else if((dsps & 0xfffff0f0) == A_UNEXPECTED_PHASE) {
1071 __u8 i = (dsps & 0xf00) >> 8;
1072
1073 scmd_printk(KERN_ERR, SCp, "UNEXPECTED PHASE %s (%s)\n",
1074 NCR_700_phase[i],
1075 sbcl_to_string(NCR_700_readb(host, SBCL_REG)));
1076 scmd_printk(KERN_ERR, SCp, " len = %d, cmd =",
1077 SCp->cmd_len);
1078 scsi_print_command(SCp);
1079
1080 NCR_700_internal_bus_reset(host);
1081 } else if((dsps & 0xfffff000) == A_FATAL) {
1082 int i = (dsps & 0xfff);
1083
1084 printk(KERN_ERR "scsi%d: (%d:%d) FATAL ERROR: %s\n",
1085 host->host_no, pun, lun, NCR_700_fatal_messages[i]);
1086 if(dsps == A_FATAL_ILLEGAL_MSG_LENGTH) {
1087 printk(KERN_ERR " msg begins %02x %02x\n",
1088 hostdata->msgin[0], hostdata->msgin[1]);
1089 }
1090 NCR_700_internal_bus_reset(host);
1091 } else if((dsps & 0xfffff0f0) == A_DISCONNECT) {
1092#ifdef NCR_700_DEBUG
1093 __u8 i = (dsps & 0xf00) >> 8;
1094
1095 printk("scsi%d: (%d:%d), DISCONNECTED (%d) %s\n",
1096 host->host_no, pun, lun,
1097 i, NCR_700_phase[i]);
1098#endif
1099 save_for_reselection(hostdata, SCp, dsp);
1100
1101 } else if(dsps == A_RESELECTION_IDENTIFIED) {
1102 __u8 lun;
1103 struct NCR_700_command_slot *slot;
1104 __u8 reselection_id = hostdata->reselection_id;
1105 struct scsi_device *SDp;
1106
1107 lun = hostdata->msgin[0] & 0x1f;
1108
1109 hostdata->reselection_id = 0xff;
1110 DEBUG(("scsi%d: (%d:%d) RESELECTED!\n",
1111 host->host_no, reselection_id, lun));
1112
1113 SDp = __scsi_device_lookup(host, 0, reselection_id, lun);
1114 if(unlikely(SDp == NULL)) {
1115 printk(KERN_ERR "scsi%d: (%d:%d) HAS NO device\n",
1116 host->host_no, reselection_id, lun);
1117 BUG();
1118 }
1119 if(hostdata->msgin[1] == A_SIMPLE_TAG_MSG) {
1120 struct scsi_cmnd *SCp;
1121
1122 SCp = scsi_host_find_tag(SDp->host, hostdata->msgin[2]);
1123 if(unlikely(SCp == NULL)) {
1124 printk(KERN_ERR "scsi%d: (%d:%d) no saved request for tag %d\n",
1125 host->host_no, reselection_id, lun, hostdata->msgin[2]);
1126 BUG();
1127 }
1128
1129 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1130 DDEBUG(KERN_DEBUG, SDp,
1131 "reselection is tag %d, slot %p(%d)\n",
1132 hostdata->msgin[2], slot, slot->tag);
1133 } else {
1134 struct NCR_700_Device_Parameters *p = SDp->hostdata;
1135 struct scsi_cmnd *SCp = p->current_cmnd;
1136
1137 if(unlikely(SCp == NULL)) {
1138 sdev_printk(KERN_ERR, SDp,
1139 "no saved request for untagged cmd\n");
1140 BUG();
1141 }
1142 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1143 }
1144
1145 if(slot == NULL) {
1146 printk(KERN_ERR "scsi%d: (%d:%d) RESELECTED but no saved command (MSG = %02x %02x %02x)!!\n",
1147 host->host_no, reselection_id, lun,
1148 hostdata->msgin[0], hostdata->msgin[1],
1149 hostdata->msgin[2]);
1150 } else {
1151 if(hostdata->state != NCR_700_HOST_BUSY)
1152 printk(KERN_ERR "scsi%d: FATAL, host not busy during valid reselection!\n",
1153 host->host_no);
1154 resume_offset = slot->resume_offset;
1155 hostdata->cmd = slot->cmnd;
1156
1157
1158 script_patch_32_abs(hostdata, hostdata->script,
1159 CommandAddress, slot->pCmd);
1160 script_patch_16(hostdata, hostdata->script,
1161 CommandCount, slot->cmnd->cmd_len);
1162 script_patch_32_abs(hostdata, hostdata->script,
1163 SGScriptStartAddress,
1164 to32bit(&slot->pSG[0].ins));
1165
1166
1167
1168
1169
1170
1171 NCR_700_writeb(NCR_700_get_SXFER(hostdata->cmd->device),
1172 host, SXFER_REG);
1173 dma_sync_from_dev(hostdata, hostdata->msgin,
1174 MSG_ARRAY_SIZE);
1175 dma_sync_to_dev(hostdata, hostdata->msgout,
1176 MSG_ARRAY_SIZE);
1177
1178
1179 dma_sync_to_dev(hostdata, slot->cmnd->cmnd,
1180 slot->cmnd->cmd_len);
1181
1182
1183
1184 }
1185 } else if(dsps == A_RESELECTED_DURING_SELECTION) {
1186
1187
1188
1189
1190
1191
1192
1193
1194 __u8 reselection_id = NCR_700_readb(host, SFBR_REG);
1195 struct NCR_700_command_slot *slot;
1196
1197
1198 reselection_id &= ~(1<<host->this_id);
1199
1200
1201
1202 printk(KERN_INFO "scsi%d: (%d:%d) RESELECTION DURING SELECTION, dsp=%08x[%04x] state=%d, count=%d\n",
1203 host->host_no, reselection_id, lun, dsp, dsp - hostdata->pScript, hostdata->state, hostdata->command_slot_count);
1204
1205 {
1206
1207 __u32 SG = (__u32)bS_to_cpu(hostdata->script[A_SGScriptStartAddress_used[0]]);
1208 int i;
1209
1210 for(i=0; i< NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1211 if(SG >= to32bit(&hostdata->slots[i].pSG[0])
1212 && SG <= to32bit(&hostdata->slots[i].pSG[NCR_700_SG_SEGMENTS]))
1213 break;
1214 }
1215 printk(KERN_INFO "IDENTIFIED SG segment as being %08x in slot %p, cmd %p, slot->resume_offset=%08x\n", SG, &hostdata->slots[i], hostdata->slots[i].cmnd, hostdata->slots[i].resume_offset);
1216 SCp = hostdata->slots[i].cmnd;
1217 }
1218
1219 if(SCp != NULL) {
1220 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1221
1222 slot->state = NCR_700_SLOT_QUEUED;
1223 }
1224 hostdata->cmd = NULL;
1225
1226 if(reselection_id == 0) {
1227 if(hostdata->reselection_id == 0xff) {
1228 printk(KERN_ERR "scsi%d: Invalid reselection during selection!!\n", host->host_no);
1229 return 0;
1230 } else {
1231 printk(KERN_ERR "scsi%d: script reselected and we took a selection interrupt\n",
1232 host->host_no);
1233 reselection_id = hostdata->reselection_id;
1234 }
1235 } else {
1236
1237
1238 reselection_id = bitmap_to_number(reselection_id);
1239 }
1240 hostdata->reselection_id = reselection_id;
1241
1242 hostdata->msgin[1] = 0;
1243 dma_sync_to_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
1244 if(hostdata->tag_negotiated & (1<<reselection_id)) {
1245 resume_offset = hostdata->pScript + Ent_GetReselectionWithTag;
1246 } else {
1247 resume_offset = hostdata->pScript + Ent_GetReselectionData;
1248 }
1249 } else if(dsps == A_COMPLETED_SELECTION_AS_TARGET) {
1250
1251
1252
1253 DEBUG((" SELECTION COMPLETED\n"));
1254 } else if((dsps & 0xfffff0f0) == A_MSG_IN) {
1255 resume_offset = process_message(host, hostdata, SCp,
1256 dsp, dsps);
1257 } else if((dsps & 0xfffff000) == 0) {
1258 __u8 i = (dsps & 0xf0) >> 4, j = (dsps & 0xf00) >> 8;
1259 printk(KERN_ERR "scsi%d: (%d:%d), unhandled script condition %s %s at %04x\n",
1260 host->host_no, pun, lun, NCR_700_condition[i],
1261 NCR_700_phase[j], dsp - hostdata->pScript);
1262 if(SCp != NULL) {
1263 struct scatterlist *sg;
1264
1265 scsi_print_command(SCp);
1266 scsi_for_each_sg(SCp, sg, scsi_sg_count(SCp) + 1, i) {
1267 printk(KERN_INFO " SG[%d].length = %d, move_insn=%08x, addr %08x\n", i, sg->length, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].ins, ((struct NCR_700_command_slot *)SCp->host_scribble)->SG[i].pAddr);
1268 }
1269 }
1270 NCR_700_internal_bus_reset(host);
1271 } else if((dsps & 0xfffff000) == A_DEBUG_INTERRUPT) {
1272 printk(KERN_NOTICE "scsi%d (%d:%d) DEBUG INTERRUPT %d AT %08x[%04x], continuing\n",
1273 host->host_no, pun, lun, dsps & 0xfff, dsp, dsp - hostdata->pScript);
1274 resume_offset = dsp;
1275 } else {
1276 printk(KERN_ERR "scsi%d: (%d:%d), unidentified script interrupt 0x%x at %04x\n",
1277 host->host_no, pun, lun, dsps, dsp - hostdata->pScript);
1278 NCR_700_internal_bus_reset(host);
1279 }
1280 return resume_offset;
1281}
1282
1283
1284
1285
1286
1287
1288
1289
1290STATIC inline __u32
1291process_selection(struct Scsi_Host *host, __u32 dsp)
1292{
1293 __u8 id = 0;
1294 int count = 0;
1295 __u32 resume_offset = 0;
1296 struct NCR_700_Host_Parameters *hostdata =
1297 (struct NCR_700_Host_Parameters *)host->hostdata[0];
1298 struct scsi_cmnd *SCp = hostdata->cmd;
1299 __u8 sbcl;
1300
1301 for(count = 0; count < 5; count++) {
1302 id = NCR_700_readb(host, hostdata->chip710 ?
1303 CTEST9_REG : SFBR_REG);
1304
1305
1306 id &= ~(1<<host->this_id);
1307 if(id != 0)
1308 break;
1309 udelay(5);
1310 }
1311 sbcl = NCR_700_readb(host, SBCL_REG);
1312 if((sbcl & SBCL_IO) == 0) {
1313
1314 id = 0xff;
1315 } else {
1316
1317 hostdata->reselection_id = id = bitmap_to_number(id);
1318 DEBUG(("scsi%d: Reselected by %d\n",
1319 host->host_no, id));
1320 }
1321 if(hostdata->state == NCR_700_HOST_BUSY && SCp != NULL) {
1322 struct NCR_700_command_slot *slot =
1323 (struct NCR_700_command_slot *)SCp->host_scribble;
1324 DEBUG((" ID %d WARNING: RESELECTION OF BUSY HOST, saving cmd %p, slot %p, addr %x [%04x], resume %x!\n", id, hostdata->cmd, slot, dsp, dsp - hostdata->pScript, resume_offset));
1325
1326 switch(dsp - hostdata->pScript) {
1327 case Ent_Disconnect1:
1328 case Ent_Disconnect2:
1329 save_for_reselection(hostdata, SCp, Ent_Disconnect2 + hostdata->pScript);
1330 break;
1331 case Ent_Disconnect3:
1332 case Ent_Disconnect4:
1333 save_for_reselection(hostdata, SCp, Ent_Disconnect4 + hostdata->pScript);
1334 break;
1335 case Ent_Disconnect5:
1336 case Ent_Disconnect6:
1337 save_for_reselection(hostdata, SCp, Ent_Disconnect6 + hostdata->pScript);
1338 break;
1339 case Ent_Disconnect7:
1340 case Ent_Disconnect8:
1341 save_for_reselection(hostdata, SCp, Ent_Disconnect8 + hostdata->pScript);
1342 break;
1343 case Ent_Finish1:
1344 case Ent_Finish2:
1345 process_script_interrupt(A_GOOD_STATUS_AFTER_STATUS, dsp, SCp, host, hostdata);
1346 break;
1347
1348 default:
1349 slot->state = NCR_700_SLOT_QUEUED;
1350 break;
1351 }
1352 }
1353 hostdata->state = NCR_700_HOST_BUSY;
1354 hostdata->cmd = NULL;
1355
1356 hostdata->msgin[1] = 0;
1357 dma_sync_to_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
1358
1359 if(id == 0xff) {
1360
1361 resume_offset = hostdata->pScript + Ent_SelectedAsTarget;
1362 } else if(hostdata->tag_negotiated & (1<<id)) {
1363 resume_offset = hostdata->pScript + Ent_GetReselectionWithTag;
1364 } else {
1365 resume_offset = hostdata->pScript + Ent_GetReselectionData;
1366 }
1367 return resume_offset;
1368}
1369
1370static inline void
1371NCR_700_clear_fifo(struct Scsi_Host *host) {
1372 const struct NCR_700_Host_Parameters *hostdata
1373 = (struct NCR_700_Host_Parameters *)host->hostdata[0];
1374 if(hostdata->chip710) {
1375 NCR_700_writeb(CLR_FIFO_710, host, CTEST8_REG);
1376 } else {
1377 NCR_700_writeb(CLR_FIFO, host, DFIFO_REG);
1378 }
1379}
1380
1381static inline void
1382NCR_700_flush_fifo(struct Scsi_Host *host) {
1383 const struct NCR_700_Host_Parameters *hostdata
1384 = (struct NCR_700_Host_Parameters *)host->hostdata[0];
1385 if(hostdata->chip710) {
1386 NCR_700_writeb(FLUSH_DMA_FIFO_710, host, CTEST8_REG);
1387 udelay(10);
1388 NCR_700_writeb(0, host, CTEST8_REG);
1389 } else {
1390 NCR_700_writeb(FLUSH_DMA_FIFO, host, DFIFO_REG);
1391 udelay(10);
1392 NCR_700_writeb(0, host, DFIFO_REG);
1393 }
1394}
1395
1396
1397
1398
1399STATIC int
1400NCR_700_start_command(struct scsi_cmnd *SCp)
1401{
1402 struct NCR_700_command_slot *slot =
1403 (struct NCR_700_command_slot *)SCp->host_scribble;
1404 struct NCR_700_Host_Parameters *hostdata =
1405 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1406 __u16 count = 1;
1407 u8 lun = SCp->device->lun;
1408
1409 if(hostdata->state != NCR_700_HOST_FREE) {
1410
1411
1412
1413 slot->state = NCR_700_SLOT_QUEUED;
1414
1415 DEBUG(("scsi%d: host busy, queueing command %p, slot %p\n",
1416 SCp->device->host->host_no, slot->cmnd, slot));
1417 return 0;
1418 }
1419 hostdata->state = NCR_700_HOST_BUSY;
1420 hostdata->cmd = SCp;
1421 slot->state = NCR_700_SLOT_BUSY;
1422
1423
1424
1425 hostdata->msgout[0] = NCR_700_identify((SCp->cmnd[0] != REQUEST_SENSE &&
1426 slot->flags != NCR_700_FLAG_AUTOSENSE),
1427 lun);
1428
1429
1430
1431 if(SCp->cmnd[0] == INQUIRY || SCp->cmnd[0] == REQUEST_SENSE ||
1432 slot->flags == NCR_700_FLAG_AUTOSENSE) {
1433 NCR_700_clear_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
1434 }
1435
1436
1437
1438
1439
1440 if((hostdata->tag_negotiated & (1<<scmd_id(SCp)))
1441 && (slot->tag != SCSI_NO_TAG && SCp->cmnd[0] != REQUEST_SENSE &&
1442 slot->flags != NCR_700_FLAG_AUTOSENSE)) {
1443 count += spi_populate_tag_msg(&hostdata->msgout[count], SCp);
1444 }
1445
1446 if(hostdata->fast &&
1447 NCR_700_is_flag_clear(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC)) {
1448 count += spi_populate_sync_msg(&hostdata->msgout[count],
1449 spi_period(SCp->device->sdev_target),
1450 spi_offset(SCp->device->sdev_target));
1451 NCR_700_set_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
1452 }
1453
1454 script_patch_16(hostdata, hostdata->script, MessageCount, count);
1455
1456 script_patch_ID(hostdata, hostdata->script, Device_ID, 1<<scmd_id(SCp));
1457
1458 script_patch_32_abs(hostdata, hostdata->script, CommandAddress,
1459 slot->pCmd);
1460 script_patch_16(hostdata, hostdata->script, CommandCount, SCp->cmd_len);
1461
1462
1463 script_patch_32_abs(hostdata, hostdata->script,
1464 SGScriptStartAddress, to32bit(&slot->pSG[0].ins));
1465 NCR_700_clear_fifo(SCp->device->host);
1466
1467 if(slot->resume_offset == 0)
1468 slot->resume_offset = hostdata->pScript;
1469
1470 dma_sync_to_dev(hostdata, hostdata->msgout, count);
1471 dma_sync_from_dev(hostdata, hostdata->msgin, MSG_ARRAY_SIZE);
1472 dma_sync_to_dev(hostdata, SCp->cmnd, SCp->cmd_len);
1473 dma_sync_from_dev(hostdata, hostdata->status, 1);
1474
1475
1476 NCR_700_writeb(NCR_700_get_SXFER(SCp->device),
1477 SCp->device->host, SXFER_REG);
1478 NCR_700_writel(slot->temp, SCp->device->host, TEMP_REG);
1479 NCR_700_writel(slot->resume_offset, SCp->device->host, DSP_REG);
1480
1481 return 1;
1482}
1483
1484irqreturn_t
1485NCR_700_intr(int irq, void *dev_id)
1486{
1487 struct Scsi_Host *host = (struct Scsi_Host *)dev_id;
1488 struct NCR_700_Host_Parameters *hostdata =
1489 (struct NCR_700_Host_Parameters *)host->hostdata[0];
1490 __u8 istat;
1491 __u32 resume_offset = 0;
1492 __u8 pun = 0xff, lun = 0xff;
1493 unsigned long flags;
1494 int handled = 0;
1495
1496
1497
1498
1499
1500
1501 spin_lock_irqsave(host->host_lock, flags);
1502 if((istat = NCR_700_readb(host, ISTAT_REG))
1503 & (SCSI_INT_PENDING | DMA_INT_PENDING)) {
1504 __u32 dsps;
1505 __u8 sstat0 = 0, dstat = 0;
1506 __u32 dsp;
1507 struct scsi_cmnd *SCp = hostdata->cmd;
1508
1509 handled = 1;
1510 SCp = hostdata->cmd;
1511
1512 if(istat & SCSI_INT_PENDING) {
1513 udelay(10);
1514
1515 sstat0 = NCR_700_readb(host, SSTAT0_REG);
1516 }
1517
1518 if(istat & DMA_INT_PENDING) {
1519 udelay(10);
1520
1521 dstat = NCR_700_readb(host, DSTAT_REG);
1522 }
1523
1524 dsps = NCR_700_readl(host, DSPS_REG);
1525 dsp = NCR_700_readl(host, DSP_REG);
1526
1527 DEBUG(("scsi%d: istat %02x sstat0 %02x dstat %02x dsp %04x[%08x] dsps 0x%x\n",
1528 host->host_no, istat, sstat0, dstat,
1529 (dsp - (__u32)(hostdata->pScript))/4,
1530 dsp, dsps));
1531
1532 if(SCp != NULL) {
1533 pun = SCp->device->id;
1534 lun = SCp->device->lun;
1535 }
1536
1537 if(sstat0 & SCSI_RESET_DETECTED) {
1538 struct scsi_device *SDp;
1539 int i;
1540
1541 hostdata->state = NCR_700_HOST_BUSY;
1542
1543 printk(KERN_ERR "scsi%d: Bus Reset detected, executing command %p, slot %p, dsp %08x[%04x]\n",
1544 host->host_no, SCp, SCp == NULL ? NULL : SCp->host_scribble, dsp, dsp - hostdata->pScript);
1545
1546 scsi_report_bus_reset(host, 0);
1547
1548
1549 __shost_for_each_device(SDp, host)
1550 NCR_700_clear_flag(SDp, ~0);
1551
1552
1553 for(i = 0; i < NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1554 struct scsi_cmnd *SCp;
1555 struct NCR_700_command_slot *slot =
1556 &hostdata->slots[i];
1557
1558 if(slot->state == NCR_700_SLOT_FREE)
1559 continue;
1560
1561 SCp = slot->cmnd;
1562 printk(KERN_ERR " failing command because of reset, slot %p, cmnd %p\n",
1563 slot, SCp);
1564 free_slot(slot, hostdata);
1565 SCp->host_scribble = NULL;
1566 NCR_700_set_depth(SCp->device, 0);
1567
1568
1569
1570
1571
1572
1573 SCp->result = DID_RESET << 16;
1574 SCp->scsi_done(SCp);
1575 }
1576 mdelay(25);
1577 NCR_700_chip_setup(host);
1578
1579 hostdata->state = NCR_700_HOST_FREE;
1580 hostdata->cmd = NULL;
1581
1582 if(hostdata->eh_complete != NULL)
1583 complete(hostdata->eh_complete);
1584 goto out_unlock;
1585 } else if(sstat0 & SELECTION_TIMEOUT) {
1586 DEBUG(("scsi%d: (%d:%d) selection timeout\n",
1587 host->host_no, pun, lun));
1588 NCR_700_scsi_done(hostdata, SCp, DID_NO_CONNECT<<16);
1589 } else if(sstat0 & PHASE_MISMATCH) {
1590 struct NCR_700_command_slot *slot = (SCp == NULL) ? NULL :
1591 (struct NCR_700_command_slot *)SCp->host_scribble;
1592
1593 if(dsp == Ent_SendMessage + 8 + hostdata->pScript) {
1594
1595
1596#ifdef NCR_700_DEBUG
1597 __u32 temp = NCR_700_readl(host, TEMP_REG);
1598 int count = (hostdata->script[Ent_SendMessage/4] & 0xffffff) - ((NCR_700_readl(host, DBC_REG) & 0xffffff) + NCR_700_data_residual(host));
1599 printk("scsi%d (%d:%d) PHASE MISMATCH IN SEND MESSAGE %d remain, return %p[%04x], phase %s\n", host->host_no, pun, lun, count, (void *)temp, temp - hostdata->pScript, sbcl_to_string(NCR_700_readb(host, SBCL_REG)));
1600#endif
1601 resume_offset = hostdata->pScript + Ent_SendMessagePhaseMismatch;
1602 } else if(dsp >= to32bit(&slot->pSG[0].ins) &&
1603 dsp <= to32bit(&slot->pSG[NCR_700_SG_SEGMENTS].ins)) {
1604 int data_transfer = NCR_700_readl(host, DBC_REG) & 0xffffff;
1605 int SGcount = (dsp - to32bit(&slot->pSG[0].ins))/sizeof(struct NCR_700_SG_List);
1606 int residual = NCR_700_data_residual(host);
1607 int i;
1608#ifdef NCR_700_DEBUG
1609 __u32 naddr = NCR_700_readl(host, DNAD_REG);
1610
1611 printk("scsi%d: (%d:%d) Expected phase mismatch in slot->SG[%d], transferred 0x%x\n",
1612 host->host_no, pun, lun,
1613 SGcount, data_transfer);
1614 scsi_print_command(SCp);
1615 if(residual) {
1616 printk("scsi%d: (%d:%d) Expected phase mismatch in slot->SG[%d], transferred 0x%x, residual %d\n",
1617 host->host_no, pun, lun,
1618 SGcount, data_transfer, residual);
1619 }
1620#endif
1621 data_transfer += residual;
1622
1623 if(data_transfer != 0) {
1624 int count;
1625 __u32 pAddr;
1626
1627 SGcount--;
1628
1629 count = (bS_to_cpu(slot->SG[SGcount].ins) & 0x00ffffff);
1630 DEBUG(("DATA TRANSFER MISMATCH, count = %d, transferred %d\n", count, count-data_transfer));
1631 slot->SG[SGcount].ins &= bS_to_host(0xff000000);
1632 slot->SG[SGcount].ins |= bS_to_host(data_transfer);
1633 pAddr = bS_to_cpu(slot->SG[SGcount].pAddr);
1634 pAddr += (count - data_transfer);
1635#ifdef NCR_700_DEBUG
1636 if(pAddr != naddr) {
1637 printk("scsi%d (%d:%d) transfer mismatch pAddr=%lx, naddr=%lx, data_transfer=%d, residual=%d\n", host->host_no, pun, lun, (unsigned long)pAddr, (unsigned long)naddr, data_transfer, residual);
1638 }
1639#endif
1640 slot->SG[SGcount].pAddr = bS_to_host(pAddr);
1641 }
1642
1643 for(i=0; i<SGcount; i++) {
1644 slot->SG[i].ins = bS_to_host(SCRIPT_NOP);
1645 slot->SG[i].pAddr = 0;
1646 }
1647 dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG));
1648
1649
1650 resume_offset = hostdata->pScript + Ent_MsgInDuringData;
1651
1652 NCR_700_flush_fifo(host);
1653 } else {
1654 __u8 sbcl = NCR_700_readb(host, SBCL_REG);
1655 printk(KERN_ERR "scsi%d: (%d:%d) phase mismatch at %04x, phase %s\n",
1656 host->host_no, pun, lun, dsp - hostdata->pScript, sbcl_to_string(sbcl));
1657 NCR_700_internal_bus_reset(host);
1658 }
1659
1660 } else if(sstat0 & SCSI_GROSS_ERROR) {
1661 printk(KERN_ERR "scsi%d: (%d:%d) GROSS ERROR\n",
1662 host->host_no, pun, lun);
1663 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1664 } else if(sstat0 & PARITY_ERROR) {
1665 printk(KERN_ERR "scsi%d: (%d:%d) PARITY ERROR\n",
1666 host->host_no, pun, lun);
1667 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1668 } else if(dstat & SCRIPT_INT_RECEIVED) {
1669 DEBUG(("scsi%d: (%d:%d) ====>SCRIPT INTERRUPT<====\n",
1670 host->host_no, pun, lun));
1671 resume_offset = process_script_interrupt(dsps, dsp, SCp, host, hostdata);
1672 } else if(dstat & (ILGL_INST_DETECTED)) {
1673 printk(KERN_ERR "scsi%d: (%d:%d) Illegal Instruction detected at 0x%08x[0x%x]!!!\n"
1674 " Please email James.Bottomley@HansenPartnership.com with the details\n",
1675 host->host_no, pun, lun,
1676 dsp, dsp - hostdata->pScript);
1677 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1678 } else if(dstat & (WATCH_DOG_INTERRUPT|ABORTED)) {
1679 printk(KERN_ERR "scsi%d: (%d:%d) serious DMA problem, dstat=%02x\n",
1680 host->host_no, pun, lun, dstat);
1681 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1682 }
1683
1684
1685
1686
1687
1688
1689
1690 if(sstat0 & SELECTED) {
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706 resume_offset = process_selection(host, dsp);
1707
1708 }
1709
1710 }
1711
1712 if(resume_offset) {
1713 if(hostdata->state != NCR_700_HOST_BUSY) {
1714 printk(KERN_ERR "scsi%d: Driver error: resume at 0x%08x [0x%04x] with non busy host!\n",
1715 host->host_no, resume_offset, resume_offset - hostdata->pScript);
1716 hostdata->state = NCR_700_HOST_BUSY;
1717 }
1718
1719 DEBUG(("Attempting to resume at %x\n", resume_offset));
1720 NCR_700_clear_fifo(host);
1721 NCR_700_writel(resume_offset, host, DSP_REG);
1722 }
1723
1724
1725
1726
1727
1728 if(hostdata->state == NCR_700_HOST_FREE) {
1729 int i;
1730
1731 for(i = 0; i < NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1732
1733
1734 int j = (i + hostdata->saved_slot_position)
1735 % NCR_700_COMMAND_SLOTS_PER_HOST;
1736
1737 if(hostdata->slots[j].state != NCR_700_SLOT_QUEUED)
1738 continue;
1739 if(NCR_700_start_command(hostdata->slots[j].cmnd)) {
1740 DEBUG(("scsi%d: Issuing saved command slot %p, cmd %p\t\n",
1741 host->host_no, &hostdata->slots[j],
1742 hostdata->slots[j].cmnd));
1743 hostdata->saved_slot_position = j + 1;
1744 }
1745
1746 break;
1747 }
1748 }
1749 out_unlock:
1750 spin_unlock_irqrestore(host->host_lock, flags);
1751 return IRQ_RETVAL(handled);
1752}
1753
1754static int
1755NCR_700_queuecommand_lck(struct scsi_cmnd *SCp, void (*done)(struct scsi_cmnd *))
1756{
1757 struct NCR_700_Host_Parameters *hostdata =
1758 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1759 __u32 move_ins;
1760 struct NCR_700_command_slot *slot;
1761
1762 if(hostdata->command_slot_count >= NCR_700_COMMAND_SLOTS_PER_HOST) {
1763
1764
1765 printk(KERN_WARNING "scsi%d: Command depth has gone over queue depth\n", SCp->device->host->host_no);
1766 return 1;
1767 }
1768
1769
1770
1771
1772
1773
1774 if(NCR_700_get_depth(SCp->device) != 0
1775 && (!(hostdata->tag_negotiated & (1<<scmd_id(SCp)))
1776 || !(SCp->flags & SCMD_TAGGED))) {
1777 CDEBUG(KERN_ERR, SCp, "has non zero depth %d\n",
1778 NCR_700_get_depth(SCp->device));
1779 return SCSI_MLQUEUE_DEVICE_BUSY;
1780 }
1781 if(NCR_700_get_depth(SCp->device) >= SCp->device->queue_depth) {
1782 CDEBUG(KERN_ERR, SCp, "has max tag depth %d\n",
1783 NCR_700_get_depth(SCp->device));
1784 return SCSI_MLQUEUE_DEVICE_BUSY;
1785 }
1786 NCR_700_set_depth(SCp->device, NCR_700_get_depth(SCp->device) + 1);
1787
1788
1789
1790
1791 slot = find_empty_slot(hostdata);
1792
1793 slot->cmnd = SCp;
1794
1795 SCp->scsi_done = done;
1796 SCp->host_scribble = (unsigned char *)slot;
1797 SCp->SCp.ptr = NULL;
1798 SCp->SCp.buffer = NULL;
1799
1800#ifdef NCR_700_DEBUG
1801 printk("53c700: scsi%d, command ", SCp->device->host->host_no);
1802 scsi_print_command(SCp);
1803#endif
1804 if ((SCp->flags & SCMD_TAGGED)
1805 && (hostdata->tag_negotiated &(1<<scmd_id(SCp))) == 0
1806 && NCR_700_get_tag_neg_state(SCp->device) == NCR_700_START_TAG_NEGOTIATION) {
1807 scmd_printk(KERN_ERR, SCp, "Enabling Tag Command Queuing\n");
1808 hostdata->tag_negotiated |= (1<<scmd_id(SCp));
1809 NCR_700_set_tag_neg_state(SCp->device, NCR_700_DURING_TAG_NEGOTIATION);
1810 }
1811
1812
1813
1814
1815
1816
1817
1818 if (!(SCp->flags & SCMD_TAGGED)
1819 && (hostdata->tag_negotiated &(1<<scmd_id(SCp)))) {
1820 scmd_printk(KERN_INFO, SCp, "Disabling Tag Command Queuing\n");
1821 hostdata->tag_negotiated &= ~(1<<scmd_id(SCp));
1822 }
1823
1824 if ((hostdata->tag_negotiated & (1<<scmd_id(SCp))) &&
1825 SCp->device->simple_tags) {
1826 slot->tag = scsi_cmd_to_rq(SCp)->tag;
1827 CDEBUG(KERN_DEBUG, SCp, "sending out tag %d, slot %p\n",
1828 slot->tag, slot);
1829 } else {
1830 struct NCR_700_Device_Parameters *p = SCp->device->hostdata;
1831
1832 slot->tag = SCSI_NO_TAG;
1833
1834 p->current_cmnd = SCp;
1835 }
1836
1837
1838 if(!scsi_sg_count(SCp) && !scsi_bufflen(SCp) &&
1839 SCp->sc_data_direction != DMA_NONE) {
1840#ifdef NCR_700_DEBUG
1841 printk("53c700: Command");
1842 scsi_print_command(SCp);
1843 printk("Has wrong data direction %d\n", SCp->sc_data_direction);
1844#endif
1845 SCp->sc_data_direction = DMA_NONE;
1846 }
1847
1848 switch (SCp->cmnd[0]) {
1849 case REQUEST_SENSE:
1850
1851 SCp->cmnd[6] = 0;
1852 fallthrough;
1853 default:
1854
1855 switch(SCp->sc_data_direction) {
1856 case DMA_BIDIRECTIONAL:
1857 default:
1858 printk(KERN_ERR "53c700: Unknown command for data direction ");
1859 scsi_print_command(SCp);
1860
1861 move_ins = 0;
1862 break;
1863 case DMA_NONE:
1864 move_ins = 0;
1865 break;
1866 case DMA_FROM_DEVICE:
1867 move_ins = SCRIPT_MOVE_DATA_IN;
1868 break;
1869 case DMA_TO_DEVICE:
1870 move_ins = SCRIPT_MOVE_DATA_OUT;
1871 break;
1872 }
1873 }
1874
1875
1876 if(move_ins != 0) {
1877 int i;
1878 int sg_count;
1879 dma_addr_t vPtr = 0;
1880 struct scatterlist *sg;
1881 __u32 count = 0;
1882
1883 sg_count = scsi_dma_map(SCp);
1884 BUG_ON(sg_count < 0);
1885
1886 scsi_for_each_sg(SCp, sg, sg_count, i) {
1887 vPtr = sg_dma_address(sg);
1888 count = sg_dma_len(sg);
1889
1890 slot->SG[i].ins = bS_to_host(move_ins | count);
1891 DEBUG((" scatter block %d: move %d[%08x] from 0x%lx\n",
1892 i, count, slot->SG[i].ins, (unsigned long)vPtr));
1893 slot->SG[i].pAddr = bS_to_host(vPtr);
1894 }
1895 slot->SG[i].ins = bS_to_host(SCRIPT_RETURN);
1896 slot->SG[i].pAddr = 0;
1897 dma_sync_to_dev(hostdata, slot->SG, sizeof(slot->SG));
1898 DEBUG((" SETTING %p to %x\n",
1899 (&slot->pSG[i].ins),
1900 slot->SG[i].ins));
1901 }
1902 slot->resume_offset = 0;
1903 slot->pCmd = dma_map_single(hostdata->dev, SCp->cmnd,
1904 MAX_COMMAND_SIZE, DMA_TO_DEVICE);
1905 NCR_700_start_command(SCp);
1906 return 0;
1907}
1908
1909STATIC DEF_SCSI_QCMD(NCR_700_queuecommand)
1910
1911STATIC int
1912NCR_700_abort(struct scsi_cmnd * SCp)
1913{
1914 struct NCR_700_command_slot *slot;
1915
1916 scmd_printk(KERN_INFO, SCp, "abort command\n");
1917
1918 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1919
1920 if(slot == NULL)
1921
1922 return SUCCESS;
1923 if(SCp->cmnd[0] == TEST_UNIT_READY) {
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934 NCR_700_internal_bus_reset(SCp->device->host);
1935
1936 }
1937 return FAILED;
1938
1939}
1940
1941STATIC int
1942NCR_700_host_reset(struct scsi_cmnd * SCp)
1943{
1944 DECLARE_COMPLETION_ONSTACK(complete);
1945 struct NCR_700_Host_Parameters *hostdata =
1946 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1947
1948 scmd_printk(KERN_INFO, SCp,
1949 "New error handler wants HOST reset, cmd %p\n\t", SCp);
1950 scsi_print_command(SCp);
1951
1952
1953
1954
1955 spin_lock_irq(SCp->device->host->host_lock);
1956 while (hostdata->eh_complete != NULL) {
1957 spin_unlock_irq(SCp->device->host->host_lock);
1958 msleep_interruptible(100);
1959 spin_lock_irq(SCp->device->host->host_lock);
1960 }
1961
1962 hostdata->eh_complete = &complete;
1963 NCR_700_internal_bus_reset(SCp->device->host);
1964 NCR_700_chip_reset(SCp->device->host);
1965
1966 spin_unlock_irq(SCp->device->host->host_lock);
1967 wait_for_completion(&complete);
1968 spin_lock_irq(SCp->device->host->host_lock);
1969
1970 hostdata->eh_complete = NULL;
1971
1972 if(hostdata->fast)
1973 spi_schedule_dv_device(SCp->device);
1974
1975 spin_unlock_irq(SCp->device->host->host_lock);
1976 return SUCCESS;
1977}
1978
1979STATIC void
1980NCR_700_set_period(struct scsi_target *STp, int period)
1981{
1982 struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent);
1983 struct NCR_700_Host_Parameters *hostdata =
1984 (struct NCR_700_Host_Parameters *)SHp->hostdata[0];
1985
1986 if(!hostdata->fast)
1987 return;
1988
1989 if(period < hostdata->min_period)
1990 period = hostdata->min_period;
1991
1992 spi_period(STp) = period;
1993 spi_flags(STp) &= ~(NCR_700_DEV_NEGOTIATED_SYNC |
1994 NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
1995 spi_flags(STp) |= NCR_700_DEV_PRINT_SYNC_NEGOTIATION;
1996}
1997
1998STATIC void
1999NCR_700_set_offset(struct scsi_target *STp, int offset)
2000{
2001 struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent);
2002 struct NCR_700_Host_Parameters *hostdata =
2003 (struct NCR_700_Host_Parameters *)SHp->hostdata[0];
2004 int max_offset = hostdata->chip710
2005 ? NCR_710_MAX_OFFSET : NCR_700_MAX_OFFSET;
2006
2007 if(!hostdata->fast)
2008 return;
2009
2010 if(offset > max_offset)
2011 offset = max_offset;
2012
2013
2014 if(spi_offset(STp) == 0 && (spi_period(STp) < hostdata->min_period ||
2015 spi_period(STp) > 0xff))
2016 spi_period(STp) = hostdata->min_period;
2017
2018 spi_offset(STp) = offset;
2019 spi_flags(STp) &= ~(NCR_700_DEV_NEGOTIATED_SYNC |
2020 NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
2021 spi_flags(STp) |= NCR_700_DEV_PRINT_SYNC_NEGOTIATION;
2022}
2023
2024STATIC int
2025NCR_700_slave_alloc(struct scsi_device *SDp)
2026{
2027 SDp->hostdata = kzalloc(sizeof(struct NCR_700_Device_Parameters),
2028 GFP_KERNEL);
2029
2030 if (!SDp->hostdata)
2031 return -ENOMEM;
2032
2033 return 0;
2034}
2035
2036STATIC int
2037NCR_700_slave_configure(struct scsi_device *SDp)
2038{
2039 struct NCR_700_Host_Parameters *hostdata =
2040 (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
2041
2042
2043 if(SDp->tagged_supported) {
2044 scsi_change_queue_depth(SDp, NCR_700_DEFAULT_TAGS);
2045 NCR_700_set_tag_neg_state(SDp, NCR_700_START_TAG_NEGOTIATION);
2046 }
2047
2048 if(hostdata->fast) {
2049
2050 if (!spi_initial_dv(SDp->sdev_target))
2051 spi_dv_device(SDp);
2052 } else {
2053 spi_offset(SDp->sdev_target) = 0;
2054 spi_period(SDp->sdev_target) = 0;
2055 }
2056 return 0;
2057}
2058
2059STATIC void
2060NCR_700_slave_destroy(struct scsi_device *SDp)
2061{
2062 kfree(SDp->hostdata);
2063 SDp->hostdata = NULL;
2064}
2065
2066static int
2067NCR_700_change_queue_depth(struct scsi_device *SDp, int depth)
2068{
2069 if (depth > NCR_700_MAX_TAGS)
2070 depth = NCR_700_MAX_TAGS;
2071 return scsi_change_queue_depth(SDp, depth);
2072}
2073
2074static ssize_t
2075NCR_700_show_active_tags(struct device *dev, struct device_attribute *attr, char *buf)
2076{
2077 struct scsi_device *SDp = to_scsi_device(dev);
2078
2079 return snprintf(buf, 20, "%d\n", NCR_700_get_depth(SDp));
2080}
2081
2082static struct device_attribute NCR_700_active_tags_attr = {
2083 .attr = {
2084 .name = "active_tags",
2085 .mode = S_IRUGO,
2086 },
2087 .show = NCR_700_show_active_tags,
2088};
2089
2090STATIC struct device_attribute *NCR_700_dev_attrs[] = {
2091 &NCR_700_active_tags_attr,
2092 NULL,
2093};
2094
2095EXPORT_SYMBOL(NCR_700_detect);
2096EXPORT_SYMBOL(NCR_700_release);
2097EXPORT_SYMBOL(NCR_700_intr);
2098
2099static struct spi_function_template NCR_700_transport_functions = {
2100 .set_period = NCR_700_set_period,
2101 .show_period = 1,
2102 .set_offset = NCR_700_set_offset,
2103 .show_offset = 1,
2104};
2105
2106static int __init NCR_700_init(void)
2107{
2108 NCR_700_transport_template = spi_attach_transport(&NCR_700_transport_functions);
2109 if(!NCR_700_transport_template)
2110 return -ENODEV;
2111 return 0;
2112}
2113
2114static void __exit NCR_700_exit(void)
2115{
2116 spi_release_transport(NCR_700_transport_template);
2117}
2118
2119module_init(NCR_700_init);
2120module_exit(NCR_700_exit);
2121
2122