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115#define NCR_700_VERSION "2.8"
116
117#include <linux/kernel.h>
118#include <linux/types.h>
119#include <linux/string.h>
120#include <linux/slab.h>
121#include <linux/ioport.h>
122#include <linux/delay.h>
123#include <linux/spinlock.h>
124#include <linux/completion.h>
125#include <linux/init.h>
126#include <linux/proc_fs.h>
127#include <linux/blkdev.h>
128#include <linux/module.h>
129#include <linux/interrupt.h>
130#include <linux/device.h>
131#include <asm/dma.h>
132#include <asm/io.h>
133#include <asm/pgtable.h>
134#include <asm/byteorder.h>
135
136#include <scsi/scsi.h>
137#include <scsi/scsi_cmnd.h>
138#include <scsi/scsi_dbg.h>
139#include <scsi/scsi_eh.h>
140#include <scsi/scsi_host.h>
141#include <scsi/scsi_tcq.h>
142#include <scsi/scsi_transport.h>
143#include <scsi/scsi_transport_spi.h>
144
145#include "53c700.h"
146
147
148
149
150
151
152
153#define to32bit(x) ((__u32)((unsigned long)(x)))
154
155#ifdef NCR_700_DEBUG
156#define STATIC
157#else
158#define STATIC static
159#endif
160
161MODULE_AUTHOR("James Bottomley");
162MODULE_DESCRIPTION("53c700 and 53c700-66 Driver");
163MODULE_LICENSE("GPL");
164
165
166#include "53c700_d.h"
167
168
169STATIC int NCR_700_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *);
170STATIC int NCR_700_abort(struct scsi_cmnd * SCpnt);
171STATIC int NCR_700_bus_reset(struct scsi_cmnd * SCpnt);
172STATIC int NCR_700_host_reset(struct scsi_cmnd * SCpnt);
173STATIC void NCR_700_chip_setup(struct Scsi_Host *host);
174STATIC void NCR_700_chip_reset(struct Scsi_Host *host);
175STATIC int NCR_700_slave_alloc(struct scsi_device *SDpnt);
176STATIC int NCR_700_slave_configure(struct scsi_device *SDpnt);
177STATIC void NCR_700_slave_destroy(struct scsi_device *SDpnt);
178static int NCR_700_change_queue_depth(struct scsi_device *SDpnt, int depth, int reason);
179static int NCR_700_change_queue_type(struct scsi_device *SDpnt, int depth);
180
181STATIC struct device_attribute *NCR_700_dev_attrs[];
182
183STATIC struct scsi_transport_template *NCR_700_transport_template = NULL;
184
185static char *NCR_700_phase[] = {
186 "",
187 "after selection",
188 "before command phase",
189 "after command phase",
190 "after status phase",
191 "after data in phase",
192 "after data out phase",
193 "during data phase",
194};
195
196static char *NCR_700_condition[] = {
197 "",
198 "NOT MSG_OUT",
199 "UNEXPECTED PHASE",
200 "NOT MSG_IN",
201 "UNEXPECTED MSG",
202 "MSG_IN",
203 "SDTR_MSG RECEIVED",
204 "REJECT_MSG RECEIVED",
205 "DISCONNECT_MSG RECEIVED",
206 "MSG_OUT",
207 "DATA_IN",
208
209};
210
211static char *NCR_700_fatal_messages[] = {
212 "unexpected message after reselection",
213 "still MSG_OUT after message injection",
214 "not MSG_IN after selection",
215 "Illegal message length received",
216};
217
218static char *NCR_700_SBCL_bits[] = {
219 "IO ",
220 "CD ",
221 "MSG ",
222 "ATN ",
223 "SEL ",
224 "BSY ",
225 "ACK ",
226 "REQ ",
227};
228
229static char *NCR_700_SBCL_to_phase[] = {
230 "DATA_OUT",
231 "DATA_IN",
232 "CMD_OUT",
233 "STATE",
234 "ILLEGAL PHASE",
235 "ILLEGAL PHASE",
236 "MSG OUT",
237 "MSG IN",
238};
239
240
241
242
243
244
245static inline __u8
246NCR_700_offset_period_to_sxfer(struct NCR_700_Host_Parameters *hostdata,
247 __u8 offset, __u8 period)
248{
249 int XFERP;
250
251 __u8 min_xferp = (hostdata->chip710
252 ? NCR_710_MIN_XFERP : NCR_700_MIN_XFERP);
253 __u8 max_offset = (hostdata->chip710
254 ? NCR_710_MAX_OFFSET : NCR_700_MAX_OFFSET);
255
256 if(offset == 0)
257 return 0;
258
259 if(period < hostdata->min_period) {
260 printk(KERN_WARNING "53c700: Period %dns is less than this chip's minimum, setting to %d\n", period*4, NCR_700_MIN_PERIOD*4);
261 period = hostdata->min_period;
262 }
263 XFERP = (period*4 * hostdata->sync_clock)/1000 - 4;
264 if(offset > max_offset) {
265 printk(KERN_WARNING "53c700: Offset %d exceeds chip maximum, setting to %d\n",
266 offset, max_offset);
267 offset = max_offset;
268 }
269 if(XFERP < min_xferp) {
270 XFERP = min_xferp;
271 }
272 return (offset & 0x0f) | (XFERP & 0x07)<<4;
273}
274
275static inline __u8
276NCR_700_get_SXFER(struct scsi_device *SDp)
277{
278 struct NCR_700_Host_Parameters *hostdata =
279 (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
280
281 return NCR_700_offset_period_to_sxfer(hostdata,
282 spi_offset(SDp->sdev_target),
283 spi_period(SDp->sdev_target));
284}
285
286struct Scsi_Host *
287NCR_700_detect(struct scsi_host_template *tpnt,
288 struct NCR_700_Host_Parameters *hostdata, struct device *dev)
289{
290 dma_addr_t pScript, pSlots;
291 __u8 *memory;
292 __u32 *script;
293 struct Scsi_Host *host;
294 static int banner = 0;
295 int j;
296
297 if(tpnt->sdev_attrs == NULL)
298 tpnt->sdev_attrs = NCR_700_dev_attrs;
299
300 memory = dma_alloc_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
301 &pScript, GFP_KERNEL);
302 if(memory == NULL) {
303 printk(KERN_ERR "53c700: Failed to allocate memory for driver, detatching\n");
304 return NULL;
305 }
306
307 script = (__u32 *)memory;
308 hostdata->msgin = memory + MSGIN_OFFSET;
309 hostdata->msgout = memory + MSGOUT_OFFSET;
310 hostdata->status = memory + STATUS_OFFSET;
311 hostdata->slots = (struct NCR_700_command_slot *)(memory + SLOTS_OFFSET);
312 hostdata->dev = dev;
313
314 pSlots = pScript + SLOTS_OFFSET;
315
316
317 tpnt->queuecommand = NCR_700_queuecommand;
318 tpnt->eh_abort_handler = NCR_700_abort;
319 tpnt->eh_bus_reset_handler = NCR_700_bus_reset;
320 tpnt->eh_host_reset_handler = NCR_700_host_reset;
321 tpnt->can_queue = NCR_700_COMMAND_SLOTS_PER_HOST;
322 tpnt->sg_tablesize = NCR_700_SG_SEGMENTS;
323 tpnt->cmd_per_lun = NCR_700_CMD_PER_LUN;
324 tpnt->use_clustering = ENABLE_CLUSTERING;
325 tpnt->slave_configure = NCR_700_slave_configure;
326 tpnt->slave_destroy = NCR_700_slave_destroy;
327 tpnt->slave_alloc = NCR_700_slave_alloc;
328 tpnt->change_queue_depth = NCR_700_change_queue_depth;
329 tpnt->change_queue_type = NCR_700_change_queue_type;
330
331 if(tpnt->name == NULL)
332 tpnt->name = "53c700";
333 if(tpnt->proc_name == NULL)
334 tpnt->proc_name = "53c700";
335
336 host = scsi_host_alloc(tpnt, 4);
337 if (!host)
338 return NULL;
339 memset(hostdata->slots, 0, sizeof(struct NCR_700_command_slot)
340 * NCR_700_COMMAND_SLOTS_PER_HOST);
341 for (j = 0; j < NCR_700_COMMAND_SLOTS_PER_HOST; j++) {
342 dma_addr_t offset = (dma_addr_t)((unsigned long)&hostdata->slots[j].SG[0]
343 - (unsigned long)&hostdata->slots[0].SG[0]);
344 hostdata->slots[j].pSG = (struct NCR_700_SG_List *)((unsigned long)(pSlots + offset));
345 if(j == 0)
346 hostdata->free_list = &hostdata->slots[j];
347 else
348 hostdata->slots[j-1].ITL_forw = &hostdata->slots[j];
349 hostdata->slots[j].state = NCR_700_SLOT_FREE;
350 }
351
352 for (j = 0; j < ARRAY_SIZE(SCRIPT); j++)
353 script[j] = bS_to_host(SCRIPT[j]);
354
355
356 for (j = 0; j < PATCHES; j++)
357 script[LABELPATCHES[j]] = bS_to_host(pScript + SCRIPT[LABELPATCHES[j]]);
358
359 script_patch_32(hostdata->dev, script, MessageLocation,
360 pScript + MSGOUT_OFFSET);
361 script_patch_32(hostdata->dev, script, StatusAddress,
362 pScript + STATUS_OFFSET);
363 script_patch_32(hostdata->dev, script, ReceiveMsgAddress,
364 pScript + MSGIN_OFFSET);
365
366 hostdata->script = script;
367 hostdata->pScript = pScript;
368 dma_sync_single_for_device(hostdata->dev, pScript, sizeof(SCRIPT), DMA_TO_DEVICE);
369 hostdata->state = NCR_700_HOST_FREE;
370 hostdata->cmd = NULL;
371 host->max_id = 8;
372 host->max_lun = NCR_700_MAX_LUNS;
373 BUG_ON(NCR_700_transport_template == NULL);
374 host->transportt = NCR_700_transport_template;
375 host->unique_id = (unsigned long)hostdata->base;
376 hostdata->eh_complete = NULL;
377 host->hostdata[0] = (unsigned long)hostdata;
378
379 NCR_700_writeb(0xff, host, CTEST9_REG);
380 if (hostdata->chip710)
381 hostdata->rev = (NCR_700_readb(host, CTEST8_REG)>>4) & 0x0f;
382 else
383 hostdata->rev = (NCR_700_readb(host, CTEST7_REG)>>4) & 0x0f;
384 hostdata->fast = (NCR_700_readb(host, CTEST9_REG) == 0);
385 if (banner == 0) {
386 printk(KERN_NOTICE "53c700: Version " NCR_700_VERSION " By James.Bottomley@HansenPartnership.com\n");
387 banner = 1;
388 }
389 printk(KERN_NOTICE "scsi%d: %s rev %d %s\n", host->host_no,
390 hostdata->chip710 ? "53c710" :
391 (hostdata->fast ? "53c700-66" : "53c700"),
392 hostdata->rev, hostdata->differential ?
393 "(Differential)" : "");
394
395 NCR_700_chip_reset(host);
396
397 if (scsi_add_host(host, dev)) {
398 dev_printk(KERN_ERR, dev, "53c700: scsi_add_host failed\n");
399 scsi_host_put(host);
400 return NULL;
401 }
402
403 spi_signalling(host) = hostdata->differential ? SPI_SIGNAL_HVD :
404 SPI_SIGNAL_SE;
405
406 return host;
407}
408
409int
410NCR_700_release(struct Scsi_Host *host)
411{
412 struct NCR_700_Host_Parameters *hostdata =
413 (struct NCR_700_Host_Parameters *)host->hostdata[0];
414
415 dma_free_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
416 hostdata->script, hostdata->pScript);
417 return 1;
418}
419
420static inline __u8
421NCR_700_identify(int can_disconnect, __u8 lun)
422{
423 return IDENTIFY_BASE |
424 ((can_disconnect) ? 0x40 : 0) |
425 (lun & NCR_700_LUN_MASK);
426}
427
428
429
430
431
432
433
434
435
436
437
438static inline int
439NCR_700_data_residual (struct Scsi_Host *host) {
440 struct NCR_700_Host_Parameters *hostdata =
441 (struct NCR_700_Host_Parameters *)host->hostdata[0];
442 int count, synchronous = 0;
443 unsigned int ddir;
444
445 if(hostdata->chip710) {
446 count = ((NCR_700_readb(host, DFIFO_REG) & 0x7f) -
447 (NCR_700_readl(host, DBC_REG) & 0x7f)) & 0x7f;
448 } else {
449 count = ((NCR_700_readb(host, DFIFO_REG) & 0x3f) -
450 (NCR_700_readl(host, DBC_REG) & 0x3f)) & 0x3f;
451 }
452
453 if(hostdata->fast)
454 synchronous = NCR_700_readb(host, SXFER_REG) & 0x0f;
455
456
457 ddir = NCR_700_readb(host, CTEST0_REG) & 0x01;
458
459 if (ddir) {
460
461 if (synchronous)
462 count += (NCR_700_readb(host, SSTAT2_REG) & 0xf0) >> 4;
463 else
464 if (NCR_700_readb(host, SSTAT1_REG) & SIDL_REG_FULL)
465 ++count;
466 } else {
467
468 __u8 sstat = NCR_700_readb(host, SSTAT1_REG);
469 if (sstat & SODL_REG_FULL)
470 ++count;
471 if (synchronous && (sstat & SODR_REG_FULL))
472 ++count;
473 }
474#ifdef NCR_700_DEBUG
475 if(count)
476 printk("RESIDUAL IS %d (ddir %d)\n", count, ddir);
477#endif
478 return count;
479}
480
481
482
483static inline char *
484sbcl_to_string(__u8 sbcl)
485{
486 int i;
487 static char ret[256];
488
489 ret[0]='\0';
490 for(i=0; i<8; i++) {
491 if((1<<i) & sbcl)
492 strcat(ret, NCR_700_SBCL_bits[i]);
493 }
494 strcat(ret, NCR_700_SBCL_to_phase[sbcl & 0x07]);
495 return ret;
496}
497
498static inline __u8
499bitmap_to_number(__u8 bitmap)
500{
501 __u8 i;
502
503 for(i=0; i<8 && !(bitmap &(1<<i)); i++)
504 ;
505 return i;
506}
507
508
509STATIC struct NCR_700_command_slot *
510find_empty_slot(struct NCR_700_Host_Parameters *hostdata)
511{
512 struct NCR_700_command_slot *slot = hostdata->free_list;
513
514 if(slot == NULL) {
515
516 if(hostdata->command_slot_count != NCR_700_COMMAND_SLOTS_PER_HOST)
517 printk(KERN_ERR "SLOTS FULL, but count is %d, should be %d\n", hostdata->command_slot_count, NCR_700_COMMAND_SLOTS_PER_HOST);
518 return NULL;
519 }
520
521 if(slot->state != NCR_700_SLOT_FREE)
522
523 printk(KERN_ERR "BUSY SLOT ON FREE LIST!!!\n");
524
525
526 hostdata->free_list = slot->ITL_forw;
527 slot->ITL_forw = NULL;
528
529
530
531
532
533
534 slot->state = NCR_700_SLOT_BUSY;
535 slot->flags = 0;
536 hostdata->command_slot_count++;
537
538 return slot;
539}
540
541STATIC void
542free_slot(struct NCR_700_command_slot *slot,
543 struct NCR_700_Host_Parameters *hostdata)
544{
545 if((slot->state & NCR_700_SLOT_MASK) != NCR_700_SLOT_MAGIC) {
546 printk(KERN_ERR "53c700: SLOT %p is not MAGIC!!!\n", slot);
547 }
548 if(slot->state == NCR_700_SLOT_FREE) {
549 printk(KERN_ERR "53c700: SLOT %p is FREE!!!\n", slot);
550 }
551
552 slot->resume_offset = 0;
553 slot->cmnd = NULL;
554 slot->state = NCR_700_SLOT_FREE;
555 slot->ITL_forw = hostdata->free_list;
556 hostdata->free_list = slot;
557 hostdata->command_slot_count--;
558}
559
560
561
562
563STATIC void
564save_for_reselection(struct NCR_700_Host_Parameters *hostdata,
565 struct scsi_cmnd *SCp, __u32 dsp)
566{
567
568 if(SCp != NULL) {
569 struct NCR_700_command_slot *slot =
570 (struct NCR_700_command_slot *)SCp->host_scribble;
571
572 slot->resume_offset = dsp;
573 }
574 hostdata->state = NCR_700_HOST_FREE;
575 hostdata->cmd = NULL;
576}
577
578STATIC inline void
579NCR_700_unmap(struct NCR_700_Host_Parameters *hostdata, struct scsi_cmnd *SCp,
580 struct NCR_700_command_slot *slot)
581{
582 if(SCp->sc_data_direction != DMA_NONE &&
583 SCp->sc_data_direction != DMA_BIDIRECTIONAL)
584 scsi_dma_unmap(SCp);
585}
586
587STATIC inline void
588NCR_700_scsi_done(struct NCR_700_Host_Parameters *hostdata,
589 struct scsi_cmnd *SCp, int result)
590{
591 hostdata->state = NCR_700_HOST_FREE;
592 hostdata->cmd = NULL;
593
594 if(SCp != NULL) {
595 struct NCR_700_command_slot *slot =
596 (struct NCR_700_command_slot *)SCp->host_scribble;
597
598 dma_unmap_single(hostdata->dev, slot->pCmd,
599 MAX_COMMAND_SIZE, DMA_TO_DEVICE);
600 if (slot->flags == NCR_700_FLAG_AUTOSENSE) {
601 char *cmnd = NCR_700_get_sense_cmnd(SCp->device);
602#ifdef NCR_700_DEBUG
603 printk(" ORIGINAL CMD %p RETURNED %d, new return is %d sense is\n",
604 SCp, SCp->cmnd[7], result);
605 scsi_print_sense("53c700", SCp);
606
607#endif
608 dma_unmap_single(hostdata->dev, slot->dma_handle,
609 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
610
611
612 if (result == 0)
613 result = cmnd[7];
614
615 SCp->cmd_len = cmnd[8];
616 } else
617 NCR_700_unmap(hostdata, SCp, slot);
618
619 free_slot(slot, hostdata);
620#ifdef NCR_700_DEBUG
621 if(NCR_700_get_depth(SCp->device) == 0 ||
622 NCR_700_get_depth(SCp->device) > SCp->device->queue_depth)
623 printk(KERN_ERR "Invalid depth in NCR_700_scsi_done(): %d\n",
624 NCR_700_get_depth(SCp->device));
625#endif
626 NCR_700_set_depth(SCp->device, NCR_700_get_depth(SCp->device) - 1);
627
628 SCp->host_scribble = NULL;
629 SCp->result = result;
630 SCp->scsi_done(SCp);
631 } else {
632 printk(KERN_ERR "53c700: SCSI DONE HAS NULL SCp\n");
633 }
634}
635
636
637STATIC void
638NCR_700_internal_bus_reset(struct Scsi_Host *host)
639{
640
641 NCR_700_writeb(ASSERT_RST, host, SCNTL1_REG);
642 udelay(50);
643 NCR_700_writeb(0, host, SCNTL1_REG);
644
645}
646
647STATIC void
648NCR_700_chip_setup(struct Scsi_Host *host)
649{
650 struct NCR_700_Host_Parameters *hostdata =
651 (struct NCR_700_Host_Parameters *)host->hostdata[0];
652 __u8 min_period;
653 __u8 min_xferp = (hostdata->chip710 ? NCR_710_MIN_XFERP : NCR_700_MIN_XFERP);
654
655 if(hostdata->chip710) {
656 __u8 burst_disable = 0;
657 __u8 burst_length = 0;
658
659 switch (hostdata->burst_length) {
660 case 1:
661 burst_length = BURST_LENGTH_1;
662 break;
663 case 2:
664 burst_length = BURST_LENGTH_2;
665 break;
666 case 4:
667 burst_length = BURST_LENGTH_4;
668 break;
669 case 8:
670 burst_length = BURST_LENGTH_8;
671 break;
672 default:
673 burst_disable = BURST_DISABLE;
674 break;
675 }
676 hostdata->dcntl_extra |= COMPAT_700_MODE;
677
678 NCR_700_writeb(hostdata->dcntl_extra, host, DCNTL_REG);
679 NCR_700_writeb(burst_length | hostdata->dmode_extra,
680 host, DMODE_710_REG);
681 NCR_700_writeb(burst_disable | hostdata->ctest7_extra |
682 (hostdata->differential ? DIFF : 0),
683 host, CTEST7_REG);
684 NCR_700_writeb(BTB_TIMER_DISABLE, host, CTEST0_REG);
685 NCR_700_writeb(FULL_ARBITRATION | ENABLE_PARITY | PARITY
686 | AUTO_ATN, host, SCNTL0_REG);
687 } else {
688 NCR_700_writeb(BURST_LENGTH_8 | hostdata->dmode_extra,
689 host, DMODE_700_REG);
690 NCR_700_writeb(hostdata->differential ?
691 DIFF : 0, host, CTEST7_REG);
692 if(hostdata->fast) {
693
694 NCR_700_writeb(LAST_DIS_ENBL | ENABLE_ACTIVE_NEGATION
695 | GENERATE_RECEIVE_PARITY, host,
696 CTEST8_REG);
697 } else {
698 NCR_700_writeb(FULL_ARBITRATION | ENABLE_PARITY
699 | PARITY | AUTO_ATN, host, SCNTL0_REG);
700 }
701 }
702
703 NCR_700_writeb(1 << host->this_id, host, SCID_REG);
704 NCR_700_writeb(0, host, SBCL_REG);
705 NCR_700_writeb(ASYNC_OPERATION, host, SXFER_REG);
706
707 NCR_700_writeb(PHASE_MM_INT | SEL_TIMEOUT_INT | GROSS_ERR_INT | UX_DISC_INT
708 | RST_INT | PAR_ERR_INT | SELECT_INT, host, SIEN_REG);
709
710 NCR_700_writeb(ABORT_INT | INT_INST_INT | ILGL_INST_INT, host, DIEN_REG);
711 NCR_700_writeb(ENABLE_SELECT, host, SCNTL1_REG);
712 if(hostdata->clock > 75) {
713 printk(KERN_ERR "53c700: Clock speed %dMHz is too high: 75Mhz is the maximum this chip can be driven at\n", hostdata->clock);
714
715
716 DEBUG(("53c700: sync 2 async 3\n"));
717 NCR_700_writeb(SYNC_DIV_2_0, host, SBCL_REG);
718 NCR_700_writeb(ASYNC_DIV_3_0 | hostdata->dcntl_extra, host, DCNTL_REG);
719 hostdata->sync_clock = hostdata->clock/2;
720 } else if(hostdata->clock > 50 && hostdata->clock <= 75) {
721
722 DEBUG(("53c700: sync 1.5 async 3\n"));
723 NCR_700_writeb(SYNC_DIV_1_5, host, SBCL_REG);
724 NCR_700_writeb(ASYNC_DIV_3_0 | hostdata->dcntl_extra, host, DCNTL_REG);
725 hostdata->sync_clock = hostdata->clock*2;
726 hostdata->sync_clock /= 3;
727
728 } else if(hostdata->clock > 37 && hostdata->clock <= 50) {
729
730 DEBUG(("53c700: sync 1 async 2\n"));
731 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
732 NCR_700_writeb(ASYNC_DIV_2_0 | hostdata->dcntl_extra, host, DCNTL_REG);
733 hostdata->sync_clock = hostdata->clock;
734 } else if(hostdata->clock > 25 && hostdata->clock <=37) {
735
736 DEBUG(("53c700: sync 1 async 1.5\n"));
737 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
738 NCR_700_writeb(ASYNC_DIV_1_5 | hostdata->dcntl_extra, host, DCNTL_REG);
739 hostdata->sync_clock = hostdata->clock;
740 } else {
741 DEBUG(("53c700: sync 1 async 1\n"));
742 NCR_700_writeb(SYNC_DIV_1_0, host, SBCL_REG);
743 NCR_700_writeb(ASYNC_DIV_1_0 | hostdata->dcntl_extra, host, DCNTL_REG);
744
745 hostdata->sync_clock = hostdata->clock;
746 }
747
748
749
750
751 min_period = 1000*(4+min_xferp)/(4*hostdata->sync_clock);
752 hostdata->min_period = NCR_700_MIN_PERIOD;
753 if(min_period > NCR_700_MIN_PERIOD)
754 hostdata->min_period = min_period;
755}
756
757STATIC void
758NCR_700_chip_reset(struct Scsi_Host *host)
759{
760 struct NCR_700_Host_Parameters *hostdata =
761 (struct NCR_700_Host_Parameters *)host->hostdata[0];
762 if(hostdata->chip710) {
763 NCR_700_writeb(SOFTWARE_RESET_710, host, ISTAT_REG);
764 udelay(100);
765
766 NCR_700_writeb(0, host, ISTAT_REG);
767 } else {
768 NCR_700_writeb(SOFTWARE_RESET, host, DCNTL_REG);
769 udelay(100);
770
771 NCR_700_writeb(0, host, DCNTL_REG);
772 }
773
774 mdelay(1000);
775
776 NCR_700_chip_setup(host);
777}
778
779
780
781
782
783
784
785STATIC __u32
786process_extended_message(struct Scsi_Host *host,
787 struct NCR_700_Host_Parameters *hostdata,
788 struct scsi_cmnd *SCp, __u32 dsp, __u32 dsps)
789{
790 __u32 resume_offset = dsp, temp = dsp + 8;
791 __u8 pun = 0xff, lun = 0xff;
792
793 if(SCp != NULL) {
794 pun = SCp->device->id;
795 lun = SCp->device->lun;
796 }
797
798 switch(hostdata->msgin[2]) {
799 case A_SDTR_MSG:
800 if(SCp != NULL && NCR_700_is_flag_set(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION)) {
801 struct scsi_target *starget = SCp->device->sdev_target;
802 __u8 period = hostdata->msgin[3];
803 __u8 offset = hostdata->msgin[4];
804
805 if(offset == 0 || period == 0) {
806 offset = 0;
807 period = 0;
808 }
809
810 spi_offset(starget) = offset;
811 spi_period(starget) = period;
812
813 if(NCR_700_is_flag_set(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION)) {
814 spi_display_xfer_agreement(starget);
815 NCR_700_clear_flag(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION);
816 }
817
818 NCR_700_set_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
819 NCR_700_clear_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
820
821 NCR_700_writeb(NCR_700_get_SXFER(SCp->device),
822 host, SXFER_REG);
823
824 } else {
825
826 shost_printk(KERN_WARNING, host,
827 "Unexpected SDTR msg\n");
828 hostdata->msgout[0] = A_REJECT_MSG;
829 dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
830 script_patch_16(hostdata->dev, hostdata->script,
831 MessageCount, 1);
832
833
834 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
835 }
836 break;
837
838 case A_WDTR_MSG:
839 printk(KERN_INFO "scsi%d: (%d:%d), Unsolicited WDTR after CMD, Rejecting\n",
840 host->host_no, pun, lun);
841 hostdata->msgout[0] = A_REJECT_MSG;
842 dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
843 script_patch_16(hostdata->dev, hostdata->script, MessageCount,
844 1);
845 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
846
847 break;
848
849 default:
850 printk(KERN_INFO "scsi%d (%d:%d): Unexpected message %s: ",
851 host->host_no, pun, lun,
852 NCR_700_phase[(dsps & 0xf00) >> 8]);
853 spi_print_msg(hostdata->msgin);
854 printk("\n");
855
856 hostdata->msgout[0] = A_REJECT_MSG;
857 dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
858 script_patch_16(hostdata->dev, hostdata->script, MessageCount,
859 1);
860
861
862 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
863 }
864 NCR_700_writel(temp, host, TEMP_REG);
865 return resume_offset;
866}
867
868STATIC __u32
869process_message(struct Scsi_Host *host, struct NCR_700_Host_Parameters *hostdata,
870 struct scsi_cmnd *SCp, __u32 dsp, __u32 dsps)
871{
872
873 __u32 temp = dsp + 8, resume_offset = dsp;
874 __u8 pun = 0xff, lun = 0xff;
875
876 if(SCp != NULL) {
877 pun = SCp->device->id;
878 lun = SCp->device->lun;
879 }
880
881#ifdef NCR_700_DEBUG
882 printk("scsi%d (%d:%d): message %s: ", host->host_no, pun, lun,
883 NCR_700_phase[(dsps & 0xf00) >> 8]);
884 spi_print_msg(hostdata->msgin);
885 printk("\n");
886#endif
887
888 switch(hostdata->msgin[0]) {
889
890 case A_EXTENDED_MSG:
891 resume_offset = process_extended_message(host, hostdata, SCp,
892 dsp, dsps);
893 break;
894
895 case A_REJECT_MSG:
896 if(SCp != NULL && NCR_700_is_flag_set(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION)) {
897
898 spi_period(SCp->device->sdev_target) =
899 spi_offset(SCp->device->sdev_target) = 0;
900 NCR_700_set_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
901 NCR_700_clear_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
902 } else if(SCp != NULL && NCR_700_get_tag_neg_state(SCp->device) == NCR_700_DURING_TAG_NEGOTIATION) {
903
904 scmd_printk(KERN_WARNING, SCp,
905 "Rejected first tag queue attempt, turning off tag queueing\n");
906
907 NCR_700_set_tag_neg_state(SCp->device, NCR_700_FINISHED_TAG_NEGOTIATION);
908 hostdata->tag_negotiated &= ~(1<<scmd_id(SCp));
909 SCp->device->tagged_supported = 0;
910 scsi_deactivate_tcq(SCp->device, host->cmd_per_lun);
911 } else {
912 shost_printk(KERN_WARNING, host,
913 "(%d:%d) Unexpected REJECT Message %s\n",
914 pun, lun,
915 NCR_700_phase[(dsps & 0xf00) >> 8]);
916
917 }
918 break;
919
920 case A_PARITY_ERROR_MSG:
921 printk(KERN_ERR "scsi%d (%d:%d) Parity Error!\n", host->host_no,
922 pun, lun);
923 NCR_700_internal_bus_reset(host);
924 break;
925 case A_SIMPLE_TAG_MSG:
926 printk(KERN_INFO "scsi%d (%d:%d) SIMPLE TAG %d %s\n", host->host_no,
927 pun, lun, hostdata->msgin[1],
928 NCR_700_phase[(dsps & 0xf00) >> 8]);
929
930 break;
931 default:
932 printk(KERN_INFO "scsi%d (%d:%d): Unexpected message %s: ",
933 host->host_no, pun, lun,
934 NCR_700_phase[(dsps & 0xf00) >> 8]);
935
936 spi_print_msg(hostdata->msgin);
937 printk("\n");
938
939 hostdata->msgout[0] = A_REJECT_MSG;
940 dma_cache_sync(hostdata->dev, hostdata->msgout, 1, DMA_TO_DEVICE);
941 script_patch_16(hostdata->dev, hostdata->script, MessageCount,
942 1);
943
944
945 resume_offset = hostdata->pScript + Ent_SendMessageWithATN;
946
947 break;
948 }
949 NCR_700_writel(temp, host, TEMP_REG);
950
951 dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE, DMA_FROM_DEVICE);
952 return resume_offset;
953}
954
955STATIC __u32
956process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp,
957 struct Scsi_Host *host,
958 struct NCR_700_Host_Parameters *hostdata)
959{
960 __u32 resume_offset = 0;
961 __u8 pun = 0xff, lun=0xff;
962
963 if(SCp != NULL) {
964 pun = SCp->device->id;
965 lun = SCp->device->lun;
966 }
967
968 if(dsps == A_GOOD_STATUS_AFTER_STATUS) {
969 DEBUG((" COMMAND COMPLETE, status=%02x\n",
970 hostdata->status[0]));
971
972 if (NCR_700_get_tag_neg_state(SCp->device) == NCR_700_DURING_TAG_NEGOTIATION)
973 NCR_700_set_tag_neg_state(SCp->device,
974 NCR_700_FINISHED_TAG_NEGOTIATION);
975
976
977 if(status_byte(hostdata->status[0]) == CHECK_CONDITION ||
978 status_byte(hostdata->status[0]) == COMMAND_TERMINATED) {
979 struct NCR_700_command_slot *slot =
980 (struct NCR_700_command_slot *)SCp->host_scribble;
981 if(slot->flags == NCR_700_FLAG_AUTOSENSE) {
982
983
984 scmd_printk(KERN_ERR, SCp,
985 "broken device is looping in contingent allegiance: ignoring\n");
986 NCR_700_scsi_done(hostdata, SCp, hostdata->status[0]);
987 } else {
988 char *cmnd =
989 NCR_700_get_sense_cmnd(SCp->device);
990#ifdef NCR_DEBUG
991 scsi_print_command(SCp);
992 printk(" cmd %p has status %d, requesting sense\n",
993 SCp, hostdata->status[0]);
994#endif
995
996
997
998
999
1000
1001
1002 NCR_700_unmap(hostdata, SCp, slot);
1003 dma_unmap_single(hostdata->dev, slot->pCmd,
1004 MAX_COMMAND_SIZE,
1005 DMA_TO_DEVICE);
1006
1007 cmnd[0] = REQUEST_SENSE;
1008 cmnd[1] = (SCp->device->lun & 0x7) << 5;
1009 cmnd[2] = 0;
1010 cmnd[3] = 0;
1011 cmnd[4] = SCSI_SENSE_BUFFERSIZE;
1012 cmnd[5] = 0;
1013
1014
1015
1016
1017
1018
1019 cmnd[6] = NCR_700_INTERNAL_SENSE_MAGIC;
1020 cmnd[7] = hostdata->status[0];
1021 cmnd[8] = SCp->cmd_len;
1022 SCp->cmd_len = 6;
1023
1024 slot->pCmd = dma_map_single(hostdata->dev, cmnd, MAX_COMMAND_SIZE, DMA_TO_DEVICE);
1025 slot->dma_handle = dma_map_single(hostdata->dev, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
1026 slot->SG[0].ins = bS_to_host(SCRIPT_MOVE_DATA_IN | SCSI_SENSE_BUFFERSIZE);
1027 slot->SG[0].pAddr = bS_to_host(slot->dma_handle);
1028 slot->SG[1].ins = bS_to_host(SCRIPT_RETURN);
1029 slot->SG[1].pAddr = 0;
1030 slot->resume_offset = hostdata->pScript;
1031 dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG[0])*2, DMA_TO_DEVICE);
1032 dma_cache_sync(hostdata->dev, SCp->sense_buffer, SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
1033
1034
1035 slot->state = NCR_700_SLOT_QUEUED;
1036 slot->flags = NCR_700_FLAG_AUTOSENSE;
1037 hostdata->state = NCR_700_HOST_FREE;
1038 hostdata->cmd = NULL;
1039 }
1040 } else {
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062 NCR_700_scsi_done(hostdata, SCp, hostdata->status[0]);
1063 }
1064 } else if((dsps & 0xfffff0f0) == A_UNEXPECTED_PHASE) {
1065 __u8 i = (dsps & 0xf00) >> 8;
1066
1067 scmd_printk(KERN_ERR, SCp, "UNEXPECTED PHASE %s (%s)\n",
1068 NCR_700_phase[i],
1069 sbcl_to_string(NCR_700_readb(host, SBCL_REG)));
1070 scmd_printk(KERN_ERR, SCp, " len = %d, cmd =",
1071 SCp->cmd_len);
1072 scsi_print_command(SCp);
1073
1074 NCR_700_internal_bus_reset(host);
1075 } else if((dsps & 0xfffff000) == A_FATAL) {
1076 int i = (dsps & 0xfff);
1077
1078 printk(KERN_ERR "scsi%d: (%d:%d) FATAL ERROR: %s\n",
1079 host->host_no, pun, lun, NCR_700_fatal_messages[i]);
1080 if(dsps == A_FATAL_ILLEGAL_MSG_LENGTH) {
1081 printk(KERN_ERR " msg begins %02x %02x\n",
1082 hostdata->msgin[0], hostdata->msgin[1]);
1083 }
1084 NCR_700_internal_bus_reset(host);
1085 } else if((dsps & 0xfffff0f0) == A_DISCONNECT) {
1086#ifdef NCR_700_DEBUG
1087 __u8 i = (dsps & 0xf00) >> 8;
1088
1089 printk("scsi%d: (%d:%d), DISCONNECTED (%d) %s\n",
1090 host->host_no, pun, lun,
1091 i, NCR_700_phase[i]);
1092#endif
1093 save_for_reselection(hostdata, SCp, dsp);
1094
1095 } else if(dsps == A_RESELECTION_IDENTIFIED) {
1096 __u8 lun;
1097 struct NCR_700_command_slot *slot;
1098 __u8 reselection_id = hostdata->reselection_id;
1099 struct scsi_device *SDp;
1100
1101 lun = hostdata->msgin[0] & 0x1f;
1102
1103 hostdata->reselection_id = 0xff;
1104 DEBUG(("scsi%d: (%d:%d) RESELECTED!\n",
1105 host->host_no, reselection_id, lun));
1106
1107 SDp = __scsi_device_lookup(host, 0, reselection_id, lun);
1108 if(unlikely(SDp == NULL)) {
1109 printk(KERN_ERR "scsi%d: (%d:%d) HAS NO device\n",
1110 host->host_no, reselection_id, lun);
1111 BUG();
1112 }
1113 if(hostdata->msgin[1] == A_SIMPLE_TAG_MSG) {
1114 struct scsi_cmnd *SCp = scsi_find_tag(SDp, hostdata->msgin[2]);
1115 if(unlikely(SCp == NULL)) {
1116 printk(KERN_ERR "scsi%d: (%d:%d) no saved request for tag %d\n",
1117 host->host_no, reselection_id, lun, hostdata->msgin[2]);
1118 BUG();
1119 }
1120
1121 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1122 DDEBUG(KERN_DEBUG, SDp,
1123 "reselection is tag %d, slot %p(%d)\n",
1124 hostdata->msgin[2], slot, slot->tag);
1125 } else {
1126 struct scsi_cmnd *SCp = scsi_find_tag(SDp, SCSI_NO_TAG);
1127 if(unlikely(SCp == NULL)) {
1128 sdev_printk(KERN_ERR, SDp,
1129 "no saved request for untagged cmd\n");
1130 BUG();
1131 }
1132 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1133 }
1134
1135 if(slot == NULL) {
1136 printk(KERN_ERR "scsi%d: (%d:%d) RESELECTED but no saved command (MSG = %02x %02x %02x)!!\n",
1137 host->host_no, reselection_id, lun,
1138 hostdata->msgin[0], hostdata->msgin[1],
1139 hostdata->msgin[2]);
1140 } else {
1141 if(hostdata->state != NCR_700_HOST_BUSY)
1142 printk(KERN_ERR "scsi%d: FATAL, host not busy during valid reselection!\n",
1143 host->host_no);
1144 resume_offset = slot->resume_offset;
1145 hostdata->cmd = slot->cmnd;
1146
1147
1148 script_patch_32_abs(hostdata->dev, hostdata->script,
1149 CommandAddress, slot->pCmd);
1150 script_patch_16(hostdata->dev, hostdata->script,
1151 CommandCount, slot->cmnd->cmd_len);
1152 script_patch_32_abs(hostdata->dev, hostdata->script,
1153 SGScriptStartAddress,
1154 to32bit(&slot->pSG[0].ins));
1155
1156
1157
1158
1159
1160
1161 NCR_700_writeb(NCR_700_get_SXFER(hostdata->cmd->device),
1162 host, SXFER_REG);
1163 dma_cache_sync(hostdata->dev, hostdata->msgin,
1164 MSG_ARRAY_SIZE, DMA_FROM_DEVICE);
1165 dma_cache_sync(hostdata->dev, hostdata->msgout,
1166 MSG_ARRAY_SIZE, DMA_TO_DEVICE);
1167
1168
1169 dma_cache_sync(hostdata->dev, slot->cmnd->cmnd,
1170 slot->cmnd->cmd_len, DMA_TO_DEVICE);
1171
1172
1173
1174 }
1175 } else if(dsps == A_RESELECTED_DURING_SELECTION) {
1176
1177
1178
1179
1180
1181
1182
1183
1184 __u8 reselection_id = NCR_700_readb(host, SFBR_REG);
1185 struct NCR_700_command_slot *slot;
1186
1187
1188 reselection_id &= ~(1<<host->this_id);
1189
1190
1191
1192 printk(KERN_INFO "scsi%d: (%d:%d) RESELECTION DURING SELECTION, dsp=%08x[%04x] state=%d, count=%d\n",
1193 host->host_no, reselection_id, lun, dsp, dsp - hostdata->pScript, hostdata->state, hostdata->command_slot_count);
1194
1195 {
1196
1197 __u32 SG = (__u32)bS_to_cpu(hostdata->script[A_SGScriptStartAddress_used[0]]);
1198 int i;
1199
1200 for(i=0; i< NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1201 if(SG >= to32bit(&hostdata->slots[i].pSG[0])
1202 && SG <= to32bit(&hostdata->slots[i].pSG[NCR_700_SG_SEGMENTS]))
1203 break;
1204 }
1205 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);
1206 SCp = hostdata->slots[i].cmnd;
1207 }
1208
1209 if(SCp != NULL) {
1210 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1211
1212 slot->state = NCR_700_SLOT_QUEUED;
1213 }
1214 hostdata->cmd = NULL;
1215
1216 if(reselection_id == 0) {
1217 if(hostdata->reselection_id == 0xff) {
1218 printk(KERN_ERR "scsi%d: Invalid reselection during selection!!\n", host->host_no);
1219 return 0;
1220 } else {
1221 printk(KERN_ERR "scsi%d: script reselected and we took a selection interrupt\n",
1222 host->host_no);
1223 reselection_id = hostdata->reselection_id;
1224 }
1225 } else {
1226
1227
1228 reselection_id = bitmap_to_number(reselection_id);
1229 }
1230 hostdata->reselection_id = reselection_id;
1231
1232 hostdata->msgin[1] = 0;
1233 dma_cache_sync(hostdata->dev, hostdata->msgin,
1234 MSG_ARRAY_SIZE, DMA_BIDIRECTIONAL);
1235 if(hostdata->tag_negotiated & (1<<reselection_id)) {
1236 resume_offset = hostdata->pScript + Ent_GetReselectionWithTag;
1237 } else {
1238 resume_offset = hostdata->pScript + Ent_GetReselectionData;
1239 }
1240 } else if(dsps == A_COMPLETED_SELECTION_AS_TARGET) {
1241
1242
1243
1244 DEBUG((" SELECTION COMPLETED\n"));
1245 } else if((dsps & 0xfffff0f0) == A_MSG_IN) {
1246 resume_offset = process_message(host, hostdata, SCp,
1247 dsp, dsps);
1248 } else if((dsps & 0xfffff000) == 0) {
1249 __u8 i = (dsps & 0xf0) >> 4, j = (dsps & 0xf00) >> 8;
1250 printk(KERN_ERR "scsi%d: (%d:%d), unhandled script condition %s %s at %04x\n",
1251 host->host_no, pun, lun, NCR_700_condition[i],
1252 NCR_700_phase[j], dsp - hostdata->pScript);
1253 if(SCp != NULL) {
1254 struct scatterlist *sg;
1255
1256 scsi_print_command(SCp);
1257 scsi_for_each_sg(SCp, sg, scsi_sg_count(SCp) + 1, i) {
1258 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);
1259 }
1260 }
1261 NCR_700_internal_bus_reset(host);
1262 } else if((dsps & 0xfffff000) == A_DEBUG_INTERRUPT) {
1263 printk(KERN_NOTICE "scsi%d (%d:%d) DEBUG INTERRUPT %d AT %08x[%04x], continuing\n",
1264 host->host_no, pun, lun, dsps & 0xfff, dsp, dsp - hostdata->pScript);
1265 resume_offset = dsp;
1266 } else {
1267 printk(KERN_ERR "scsi%d: (%d:%d), unidentified script interrupt 0x%x at %04x\n",
1268 host->host_no, pun, lun, dsps, dsp - hostdata->pScript);
1269 NCR_700_internal_bus_reset(host);
1270 }
1271 return resume_offset;
1272}
1273
1274
1275
1276
1277
1278
1279
1280
1281STATIC inline __u32
1282process_selection(struct Scsi_Host *host, __u32 dsp)
1283{
1284 __u8 id = 0;
1285 int count = 0;
1286 __u32 resume_offset = 0;
1287 struct NCR_700_Host_Parameters *hostdata =
1288 (struct NCR_700_Host_Parameters *)host->hostdata[0];
1289 struct scsi_cmnd *SCp = hostdata->cmd;
1290 __u8 sbcl;
1291
1292 for(count = 0; count < 5; count++) {
1293 id = NCR_700_readb(host, hostdata->chip710 ?
1294 CTEST9_REG : SFBR_REG);
1295
1296
1297 id &= ~(1<<host->this_id);
1298 if(id != 0)
1299 break;
1300 udelay(5);
1301 }
1302 sbcl = NCR_700_readb(host, SBCL_REG);
1303 if((sbcl & SBCL_IO) == 0) {
1304
1305 id = 0xff;
1306 } else {
1307
1308 hostdata->reselection_id = id = bitmap_to_number(id);
1309 DEBUG(("scsi%d: Reselected by %d\n",
1310 host->host_no, id));
1311 }
1312 if(hostdata->state == NCR_700_HOST_BUSY && SCp != NULL) {
1313 struct NCR_700_command_slot *slot =
1314 (struct NCR_700_command_slot *)SCp->host_scribble;
1315 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));
1316
1317 switch(dsp - hostdata->pScript) {
1318 case Ent_Disconnect1:
1319 case Ent_Disconnect2:
1320 save_for_reselection(hostdata, SCp, Ent_Disconnect2 + hostdata->pScript);
1321 break;
1322 case Ent_Disconnect3:
1323 case Ent_Disconnect4:
1324 save_for_reselection(hostdata, SCp, Ent_Disconnect4 + hostdata->pScript);
1325 break;
1326 case Ent_Disconnect5:
1327 case Ent_Disconnect6:
1328 save_for_reselection(hostdata, SCp, Ent_Disconnect6 + hostdata->pScript);
1329 break;
1330 case Ent_Disconnect7:
1331 case Ent_Disconnect8:
1332 save_for_reselection(hostdata, SCp, Ent_Disconnect8 + hostdata->pScript);
1333 break;
1334 case Ent_Finish1:
1335 case Ent_Finish2:
1336 process_script_interrupt(A_GOOD_STATUS_AFTER_STATUS, dsp, SCp, host, hostdata);
1337 break;
1338
1339 default:
1340 slot->state = NCR_700_SLOT_QUEUED;
1341 break;
1342 }
1343 }
1344 hostdata->state = NCR_700_HOST_BUSY;
1345 hostdata->cmd = NULL;
1346
1347 hostdata->msgin[1] = 0;
1348 dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE,
1349 DMA_BIDIRECTIONAL);
1350
1351 if(id == 0xff) {
1352
1353 resume_offset = hostdata->pScript + Ent_SelectedAsTarget;
1354 } else if(hostdata->tag_negotiated & (1<<id)) {
1355 resume_offset = hostdata->pScript + Ent_GetReselectionWithTag;
1356 } else {
1357 resume_offset = hostdata->pScript + Ent_GetReselectionData;
1358 }
1359 return resume_offset;
1360}
1361
1362static inline void
1363NCR_700_clear_fifo(struct Scsi_Host *host) {
1364 const struct NCR_700_Host_Parameters *hostdata
1365 = (struct NCR_700_Host_Parameters *)host->hostdata[0];
1366 if(hostdata->chip710) {
1367 NCR_700_writeb(CLR_FIFO_710, host, CTEST8_REG);
1368 } else {
1369 NCR_700_writeb(CLR_FIFO, host, DFIFO_REG);
1370 }
1371}
1372
1373static inline void
1374NCR_700_flush_fifo(struct Scsi_Host *host) {
1375 const struct NCR_700_Host_Parameters *hostdata
1376 = (struct NCR_700_Host_Parameters *)host->hostdata[0];
1377 if(hostdata->chip710) {
1378 NCR_700_writeb(FLUSH_DMA_FIFO_710, host, CTEST8_REG);
1379 udelay(10);
1380 NCR_700_writeb(0, host, CTEST8_REG);
1381 } else {
1382 NCR_700_writeb(FLUSH_DMA_FIFO, host, DFIFO_REG);
1383 udelay(10);
1384 NCR_700_writeb(0, host, DFIFO_REG);
1385 }
1386}
1387
1388
1389
1390
1391STATIC int
1392NCR_700_start_command(struct scsi_cmnd *SCp)
1393{
1394 struct NCR_700_command_slot *slot =
1395 (struct NCR_700_command_slot *)SCp->host_scribble;
1396 struct NCR_700_Host_Parameters *hostdata =
1397 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1398 __u16 count = 1;
1399
1400 if(hostdata->state != NCR_700_HOST_FREE) {
1401
1402
1403
1404 slot->state = NCR_700_SLOT_QUEUED;
1405
1406 DEBUG(("scsi%d: host busy, queueing command %p, slot %p\n",
1407 SCp->device->host->host_no, slot->cmnd, slot));
1408 return 0;
1409 }
1410 hostdata->state = NCR_700_HOST_BUSY;
1411 hostdata->cmd = SCp;
1412 slot->state = NCR_700_SLOT_BUSY;
1413
1414
1415
1416 hostdata->msgout[0] = NCR_700_identify((SCp->cmnd[0] != REQUEST_SENSE &&
1417 slot->flags != NCR_700_FLAG_AUTOSENSE),
1418 SCp->device->lun);
1419
1420
1421
1422 if(SCp->cmnd[0] == INQUIRY || SCp->cmnd[0] == REQUEST_SENSE ||
1423 slot->flags == NCR_700_FLAG_AUTOSENSE) {
1424 NCR_700_clear_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC);
1425 }
1426
1427
1428
1429
1430
1431 if((hostdata->tag_negotiated & (1<<scmd_id(SCp)))
1432 && (slot->tag != SCSI_NO_TAG && SCp->cmnd[0] != REQUEST_SENSE &&
1433 slot->flags != NCR_700_FLAG_AUTOSENSE)) {
1434 count += scsi_populate_tag_msg(SCp, &hostdata->msgout[count]);
1435 }
1436
1437 if(hostdata->fast &&
1438 NCR_700_is_flag_clear(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC)) {
1439 count += spi_populate_sync_msg(&hostdata->msgout[count],
1440 spi_period(SCp->device->sdev_target),
1441 spi_offset(SCp->device->sdev_target));
1442 NCR_700_set_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
1443 }
1444
1445 script_patch_16(hostdata->dev, hostdata->script, MessageCount, count);
1446
1447
1448 script_patch_ID(hostdata->dev, hostdata->script,
1449 Device_ID, 1<<scmd_id(SCp));
1450
1451 script_patch_32_abs(hostdata->dev, hostdata->script, CommandAddress,
1452 slot->pCmd);
1453 script_patch_16(hostdata->dev, hostdata->script, CommandCount,
1454 SCp->cmd_len);
1455
1456
1457 script_patch_32_abs(hostdata->dev, hostdata->script,
1458 SGScriptStartAddress, to32bit(&slot->pSG[0].ins));
1459 NCR_700_clear_fifo(SCp->device->host);
1460
1461 if(slot->resume_offset == 0)
1462 slot->resume_offset = hostdata->pScript;
1463
1464 dma_cache_sync(hostdata->dev, hostdata->msgout, count, DMA_TO_DEVICE);
1465 dma_cache_sync(hostdata->dev, hostdata->msgin, MSG_ARRAY_SIZE,
1466 DMA_FROM_DEVICE);
1467 dma_cache_sync(hostdata->dev, SCp->cmnd, SCp->cmd_len, DMA_TO_DEVICE);
1468 dma_cache_sync(hostdata->dev, hostdata->status, 1, DMA_FROM_DEVICE);
1469
1470
1471 NCR_700_writeb(NCR_700_get_SXFER(SCp->device),
1472 SCp->device->host, SXFER_REG);
1473 NCR_700_writel(slot->temp, SCp->device->host, TEMP_REG);
1474 NCR_700_writel(slot->resume_offset, SCp->device->host, DSP_REG);
1475
1476 return 1;
1477}
1478
1479irqreturn_t
1480NCR_700_intr(int irq, void *dev_id)
1481{
1482 struct Scsi_Host *host = (struct Scsi_Host *)dev_id;
1483 struct NCR_700_Host_Parameters *hostdata =
1484 (struct NCR_700_Host_Parameters *)host->hostdata[0];
1485 __u8 istat;
1486 __u32 resume_offset = 0;
1487 __u8 pun = 0xff, lun = 0xff;
1488 unsigned long flags;
1489 int handled = 0;
1490
1491
1492
1493
1494
1495
1496 spin_lock_irqsave(host->host_lock, flags);
1497 if((istat = NCR_700_readb(host, ISTAT_REG))
1498 & (SCSI_INT_PENDING | DMA_INT_PENDING)) {
1499 __u32 dsps;
1500 __u8 sstat0 = 0, dstat = 0;
1501 __u32 dsp;
1502 struct scsi_cmnd *SCp = hostdata->cmd;
1503 enum NCR_700_Host_State state;
1504
1505 handled = 1;
1506 state = hostdata->state;
1507 SCp = hostdata->cmd;
1508
1509 if(istat & SCSI_INT_PENDING) {
1510 udelay(10);
1511
1512 sstat0 = NCR_700_readb(host, SSTAT0_REG);
1513 }
1514
1515 if(istat & DMA_INT_PENDING) {
1516 udelay(10);
1517
1518 dstat = NCR_700_readb(host, DSTAT_REG);
1519 }
1520
1521 dsps = NCR_700_readl(host, DSPS_REG);
1522 dsp = NCR_700_readl(host, DSP_REG);
1523
1524 DEBUG(("scsi%d: istat %02x sstat0 %02x dstat %02x dsp %04x[%08x] dsps 0x%x\n",
1525 host->host_no, istat, sstat0, dstat,
1526 (dsp - (__u32)(hostdata->pScript))/4,
1527 dsp, dsps));
1528
1529 if(SCp != NULL) {
1530 pun = SCp->device->id;
1531 lun = SCp->device->lun;
1532 }
1533
1534 if(sstat0 & SCSI_RESET_DETECTED) {
1535 struct scsi_device *SDp;
1536 int i;
1537
1538 hostdata->state = NCR_700_HOST_BUSY;
1539
1540 printk(KERN_ERR "scsi%d: Bus Reset detected, executing command %p, slot %p, dsp %08x[%04x]\n",
1541 host->host_no, SCp, SCp == NULL ? NULL : SCp->host_scribble, dsp, dsp - hostdata->pScript);
1542
1543 scsi_report_bus_reset(host, 0);
1544
1545
1546 __shost_for_each_device(SDp, host)
1547 NCR_700_clear_flag(SDp, ~0);
1548
1549
1550 for(i = 0; i < NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1551 struct scsi_cmnd *SCp;
1552 struct NCR_700_command_slot *slot =
1553 &hostdata->slots[i];
1554
1555 if(slot->state == NCR_700_SLOT_FREE)
1556 continue;
1557
1558 SCp = slot->cmnd;
1559 printk(KERN_ERR " failing command because of reset, slot %p, cmnd %p\n",
1560 slot, SCp);
1561 free_slot(slot, hostdata);
1562 SCp->host_scribble = NULL;
1563 NCR_700_set_depth(SCp->device, 0);
1564
1565
1566
1567
1568
1569
1570 SCp->result = DID_RESET << 16;
1571 SCp->scsi_done(SCp);
1572 }
1573 mdelay(25);
1574 NCR_700_chip_setup(host);
1575
1576 hostdata->state = NCR_700_HOST_FREE;
1577 hostdata->cmd = NULL;
1578
1579 if(hostdata->eh_complete != NULL)
1580 complete(hostdata->eh_complete);
1581 goto out_unlock;
1582 } else if(sstat0 & SELECTION_TIMEOUT) {
1583 DEBUG(("scsi%d: (%d:%d) selection timeout\n",
1584 host->host_no, pun, lun));
1585 NCR_700_scsi_done(hostdata, SCp, DID_NO_CONNECT<<16);
1586 } else if(sstat0 & PHASE_MISMATCH) {
1587 struct NCR_700_command_slot *slot = (SCp == NULL) ? NULL :
1588 (struct NCR_700_command_slot *)SCp->host_scribble;
1589
1590 if(dsp == Ent_SendMessage + 8 + hostdata->pScript) {
1591
1592
1593#ifdef NCR_700_DEBUG
1594 __u32 temp = NCR_700_readl(host, TEMP_REG);
1595 int count = (hostdata->script[Ent_SendMessage/4] & 0xffffff) - ((NCR_700_readl(host, DBC_REG) & 0xffffff) + NCR_700_data_residual(host));
1596 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)));
1597#endif
1598 resume_offset = hostdata->pScript + Ent_SendMessagePhaseMismatch;
1599 } else if(dsp >= to32bit(&slot->pSG[0].ins) &&
1600 dsp <= to32bit(&slot->pSG[NCR_700_SG_SEGMENTS].ins)) {
1601 int data_transfer = NCR_700_readl(host, DBC_REG) & 0xffffff;
1602 int SGcount = (dsp - to32bit(&slot->pSG[0].ins))/sizeof(struct NCR_700_SG_List);
1603 int residual = NCR_700_data_residual(host);
1604 int i;
1605#ifdef NCR_700_DEBUG
1606 __u32 naddr = NCR_700_readl(host, DNAD_REG);
1607
1608 printk("scsi%d: (%d:%d) Expected phase mismatch in slot->SG[%d], transferred 0x%x\n",
1609 host->host_no, pun, lun,
1610 SGcount, data_transfer);
1611 scsi_print_command(SCp);
1612 if(residual) {
1613 printk("scsi%d: (%d:%d) Expected phase mismatch in slot->SG[%d], transferred 0x%x, residual %d\n",
1614 host->host_no, pun, lun,
1615 SGcount, data_transfer, residual);
1616 }
1617#endif
1618 data_transfer += residual;
1619
1620 if(data_transfer != 0) {
1621 int count;
1622 __u32 pAddr;
1623
1624 SGcount--;
1625
1626 count = (bS_to_cpu(slot->SG[SGcount].ins) & 0x00ffffff);
1627 DEBUG(("DATA TRANSFER MISMATCH, count = %d, transferred %d\n", count, count-data_transfer));
1628 slot->SG[SGcount].ins &= bS_to_host(0xff000000);
1629 slot->SG[SGcount].ins |= bS_to_host(data_transfer);
1630 pAddr = bS_to_cpu(slot->SG[SGcount].pAddr);
1631 pAddr += (count - data_transfer);
1632#ifdef NCR_700_DEBUG
1633 if(pAddr != naddr) {
1634 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);
1635 }
1636#endif
1637 slot->SG[SGcount].pAddr = bS_to_host(pAddr);
1638 }
1639
1640 for(i=0; i<SGcount; i++) {
1641 slot->SG[i].ins = bS_to_host(SCRIPT_NOP);
1642 slot->SG[i].pAddr = 0;
1643 }
1644 dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG), DMA_TO_DEVICE);
1645
1646
1647 resume_offset = hostdata->pScript + Ent_MsgInDuringData;
1648
1649 NCR_700_flush_fifo(host);
1650 } else {
1651 __u8 sbcl = NCR_700_readb(host, SBCL_REG);
1652 printk(KERN_ERR "scsi%d: (%d:%d) phase mismatch at %04x, phase %s\n",
1653 host->host_no, pun, lun, dsp - hostdata->pScript, sbcl_to_string(sbcl));
1654 NCR_700_internal_bus_reset(host);
1655 }
1656
1657 } else if(sstat0 & SCSI_GROSS_ERROR) {
1658 printk(KERN_ERR "scsi%d: (%d:%d) GROSS ERROR\n",
1659 host->host_no, pun, lun);
1660 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1661 } else if(sstat0 & PARITY_ERROR) {
1662 printk(KERN_ERR "scsi%d: (%d:%d) PARITY ERROR\n",
1663 host->host_no, pun, lun);
1664 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1665 } else if(dstat & SCRIPT_INT_RECEIVED) {
1666 DEBUG(("scsi%d: (%d:%d) ====>SCRIPT INTERRUPT<====\n",
1667 host->host_no, pun, lun));
1668 resume_offset = process_script_interrupt(dsps, dsp, SCp, host, hostdata);
1669 } else if(dstat & (ILGL_INST_DETECTED)) {
1670 printk(KERN_ERR "scsi%d: (%d:%d) Illegal Instruction detected at 0x%08x[0x%x]!!!\n"
1671 " Please email James.Bottomley@HansenPartnership.com with the details\n",
1672 host->host_no, pun, lun,
1673 dsp, dsp - hostdata->pScript);
1674 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1675 } else if(dstat & (WATCH_DOG_INTERRUPT|ABORTED)) {
1676 printk(KERN_ERR "scsi%d: (%d:%d) serious DMA problem, dstat=%02x\n",
1677 host->host_no, pun, lun, dstat);
1678 NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16);
1679 }
1680
1681
1682
1683
1684
1685
1686
1687 if(sstat0 & SELECTED) {
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703 resume_offset = process_selection(host, dsp);
1704
1705 }
1706
1707 }
1708
1709 if(resume_offset) {
1710 if(hostdata->state != NCR_700_HOST_BUSY) {
1711 printk(KERN_ERR "scsi%d: Driver error: resume at 0x%08x [0x%04x] with non busy host!\n",
1712 host->host_no, resume_offset, resume_offset - hostdata->pScript);
1713 hostdata->state = NCR_700_HOST_BUSY;
1714 }
1715
1716 DEBUG(("Attempting to resume at %x\n", resume_offset));
1717 NCR_700_clear_fifo(host);
1718 NCR_700_writel(resume_offset, host, DSP_REG);
1719 }
1720
1721
1722
1723
1724
1725 if(hostdata->state == NCR_700_HOST_FREE) {
1726 int i;
1727
1728 for(i = 0; i < NCR_700_COMMAND_SLOTS_PER_HOST; i++) {
1729
1730
1731 int j = (i + hostdata->saved_slot_position)
1732 % NCR_700_COMMAND_SLOTS_PER_HOST;
1733
1734 if(hostdata->slots[j].state != NCR_700_SLOT_QUEUED)
1735 continue;
1736 if(NCR_700_start_command(hostdata->slots[j].cmnd)) {
1737 DEBUG(("scsi%d: Issuing saved command slot %p, cmd %p\t\n",
1738 host->host_no, &hostdata->slots[j],
1739 hostdata->slots[j].cmnd));
1740 hostdata->saved_slot_position = j + 1;
1741 }
1742
1743 break;
1744 }
1745 }
1746 out_unlock:
1747 spin_unlock_irqrestore(host->host_lock, flags);
1748 return IRQ_RETVAL(handled);
1749}
1750
1751static int
1752NCR_700_queuecommand_lck(struct scsi_cmnd *SCp, void (*done)(struct scsi_cmnd *))
1753{
1754 struct NCR_700_Host_Parameters *hostdata =
1755 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1756 __u32 move_ins;
1757 enum dma_data_direction direction;
1758 struct NCR_700_command_slot *slot;
1759
1760 if(hostdata->command_slot_count >= NCR_700_COMMAND_SLOTS_PER_HOST) {
1761
1762
1763 printk(KERN_WARNING "scsi%d: Command depth has gone over queue depth\n", SCp->device->host->host_no);
1764 return 1;
1765 }
1766
1767
1768
1769
1770
1771
1772 if(NCR_700_get_depth(SCp->device) != 0
1773 && (!(hostdata->tag_negotiated & (1<<scmd_id(SCp)))
1774 || !blk_rq_tagged(SCp->request))) {
1775 CDEBUG(KERN_ERR, SCp, "has non zero depth %d\n",
1776 NCR_700_get_depth(SCp->device));
1777 return SCSI_MLQUEUE_DEVICE_BUSY;
1778 }
1779 if(NCR_700_get_depth(SCp->device) >= SCp->device->queue_depth) {
1780 CDEBUG(KERN_ERR, SCp, "has max tag depth %d\n",
1781 NCR_700_get_depth(SCp->device));
1782 return SCSI_MLQUEUE_DEVICE_BUSY;
1783 }
1784 NCR_700_set_depth(SCp->device, NCR_700_get_depth(SCp->device) + 1);
1785
1786
1787
1788
1789 slot = find_empty_slot(hostdata);
1790
1791 slot->cmnd = SCp;
1792
1793 SCp->scsi_done = done;
1794 SCp->host_scribble = (unsigned char *)slot;
1795 SCp->SCp.ptr = NULL;
1796 SCp->SCp.buffer = NULL;
1797
1798#ifdef NCR_700_DEBUG
1799 printk("53c700: scsi%d, command ", SCp->device->host->host_no);
1800 scsi_print_command(SCp);
1801#endif
1802 if(blk_rq_tagged(SCp->request)
1803 && (hostdata->tag_negotiated &(1<<scmd_id(SCp))) == 0
1804 && NCR_700_get_tag_neg_state(SCp->device) == NCR_700_START_TAG_NEGOTIATION) {
1805 scmd_printk(KERN_ERR, SCp, "Enabling Tag Command Queuing\n");
1806 hostdata->tag_negotiated |= (1<<scmd_id(SCp));
1807 NCR_700_set_tag_neg_state(SCp->device, NCR_700_DURING_TAG_NEGOTIATION);
1808 }
1809
1810
1811
1812
1813
1814
1815
1816 if(!blk_rq_tagged(SCp->request)
1817 && (hostdata->tag_negotiated &(1<<scmd_id(SCp)))) {
1818 scmd_printk(KERN_INFO, SCp, "Disabling Tag Command Queuing\n");
1819 hostdata->tag_negotiated &= ~(1<<scmd_id(SCp));
1820 }
1821
1822 if((hostdata->tag_negotiated &(1<<scmd_id(SCp)))
1823 && scsi_get_tag_type(SCp->device)) {
1824 slot->tag = SCp->request->tag;
1825 CDEBUG(KERN_DEBUG, SCp, "sending out tag %d, slot %p\n",
1826 slot->tag, slot);
1827 } else {
1828 slot->tag = SCSI_NO_TAG;
1829
1830 SCp->device->current_cmnd = SCp;
1831 }
1832
1833
1834 if(!scsi_sg_count(SCp) && !scsi_bufflen(SCp) &&
1835 SCp->sc_data_direction != DMA_NONE) {
1836#ifdef NCR_700_DEBUG
1837 printk("53c700: Command");
1838 scsi_print_command(SCp);
1839 printk("Has wrong data direction %d\n", SCp->sc_data_direction);
1840#endif
1841 SCp->sc_data_direction = DMA_NONE;
1842 }
1843
1844 switch (SCp->cmnd[0]) {
1845 case REQUEST_SENSE:
1846
1847 SCp->cmnd[6] = 0;
1848
1849 default:
1850
1851 switch(SCp->sc_data_direction) {
1852 case DMA_BIDIRECTIONAL:
1853 default:
1854 printk(KERN_ERR "53c700: Unknown command for data direction ");
1855 scsi_print_command(SCp);
1856
1857 move_ins = 0;
1858 break;
1859 case DMA_NONE:
1860 move_ins = 0;
1861 break;
1862 case DMA_FROM_DEVICE:
1863 move_ins = SCRIPT_MOVE_DATA_IN;
1864 break;
1865 case DMA_TO_DEVICE:
1866 move_ins = SCRIPT_MOVE_DATA_OUT;
1867 break;
1868 }
1869 }
1870
1871
1872 direction = SCp->sc_data_direction;
1873 if(move_ins != 0) {
1874 int i;
1875 int sg_count;
1876 dma_addr_t vPtr = 0;
1877 struct scatterlist *sg;
1878 __u32 count = 0;
1879
1880 sg_count = scsi_dma_map(SCp);
1881 BUG_ON(sg_count < 0);
1882
1883 scsi_for_each_sg(SCp, sg, sg_count, i) {
1884 vPtr = sg_dma_address(sg);
1885 count = sg_dma_len(sg);
1886
1887 slot->SG[i].ins = bS_to_host(move_ins | count);
1888 DEBUG((" scatter block %d: move %d[%08x] from 0x%lx\n",
1889 i, count, slot->SG[i].ins, (unsigned long)vPtr));
1890 slot->SG[i].pAddr = bS_to_host(vPtr);
1891 }
1892 slot->SG[i].ins = bS_to_host(SCRIPT_RETURN);
1893 slot->SG[i].pAddr = 0;
1894 dma_cache_sync(hostdata->dev, slot->SG, sizeof(slot->SG), DMA_TO_DEVICE);
1895 DEBUG((" SETTING %08lx to %x\n",
1896 (&slot->pSG[i].ins),
1897 slot->SG[i].ins));
1898 }
1899 slot->resume_offset = 0;
1900 slot->pCmd = dma_map_single(hostdata->dev, SCp->cmnd,
1901 MAX_COMMAND_SIZE, DMA_TO_DEVICE);
1902 NCR_700_start_command(SCp);
1903 return 0;
1904}
1905
1906STATIC DEF_SCSI_QCMD(NCR_700_queuecommand)
1907
1908STATIC int
1909NCR_700_abort(struct scsi_cmnd * SCp)
1910{
1911 struct NCR_700_command_slot *slot;
1912
1913 scmd_printk(KERN_INFO, SCp,
1914 "New error handler wants to abort command\n\t");
1915 scsi_print_command(SCp);
1916
1917 slot = (struct NCR_700_command_slot *)SCp->host_scribble;
1918
1919 if(slot == NULL)
1920
1921 return SUCCESS;
1922 if(SCp->cmnd[0] == TEST_UNIT_READY) {
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933 NCR_700_internal_bus_reset(SCp->device->host);
1934
1935 }
1936 return FAILED;
1937
1938}
1939
1940STATIC int
1941NCR_700_bus_reset(struct scsi_cmnd * SCp)
1942{
1943 DECLARE_COMPLETION_ONSTACK(complete);
1944 struct NCR_700_Host_Parameters *hostdata =
1945 (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0];
1946
1947 scmd_printk(KERN_INFO, SCp,
1948 "New error handler wants BUS reset, cmd %p\n\t", SCp);
1949 scsi_print_command(SCp);
1950
1951
1952
1953
1954 spin_lock_irq(SCp->device->host->host_lock);
1955 while (hostdata->eh_complete != NULL) {
1956 spin_unlock_irq(SCp->device->host->host_lock);
1957 msleep_interruptible(100);
1958 spin_lock_irq(SCp->device->host->host_lock);
1959 }
1960
1961 hostdata->eh_complete = &complete;
1962 NCR_700_internal_bus_reset(SCp->device->host);
1963
1964 spin_unlock_irq(SCp->device->host->host_lock);
1965 wait_for_completion(&complete);
1966 spin_lock_irq(SCp->device->host->host_lock);
1967
1968 hostdata->eh_complete = NULL;
1969
1970 if(hostdata->fast)
1971 spi_schedule_dv_device(SCp->device);
1972
1973 spin_unlock_irq(SCp->device->host->host_lock);
1974 return SUCCESS;
1975}
1976
1977STATIC int
1978NCR_700_host_reset(struct scsi_cmnd * SCp)
1979{
1980 scmd_printk(KERN_INFO, SCp, "New error handler wants HOST reset\n\t");
1981 scsi_print_command(SCp);
1982
1983 spin_lock_irq(SCp->device->host->host_lock);
1984
1985 NCR_700_internal_bus_reset(SCp->device->host);
1986 NCR_700_chip_reset(SCp->device->host);
1987
1988 spin_unlock_irq(SCp->device->host->host_lock);
1989
1990 return SUCCESS;
1991}
1992
1993STATIC void
1994NCR_700_set_period(struct scsi_target *STp, int period)
1995{
1996 struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent);
1997 struct NCR_700_Host_Parameters *hostdata =
1998 (struct NCR_700_Host_Parameters *)SHp->hostdata[0];
1999
2000 if(!hostdata->fast)
2001 return;
2002
2003 if(period < hostdata->min_period)
2004 period = hostdata->min_period;
2005
2006 spi_period(STp) = period;
2007 spi_flags(STp) &= ~(NCR_700_DEV_NEGOTIATED_SYNC |
2008 NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
2009 spi_flags(STp) |= NCR_700_DEV_PRINT_SYNC_NEGOTIATION;
2010}
2011
2012STATIC void
2013NCR_700_set_offset(struct scsi_target *STp, int offset)
2014{
2015 struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent);
2016 struct NCR_700_Host_Parameters *hostdata =
2017 (struct NCR_700_Host_Parameters *)SHp->hostdata[0];
2018 int max_offset = hostdata->chip710
2019 ? NCR_710_MAX_OFFSET : NCR_700_MAX_OFFSET;
2020
2021 if(!hostdata->fast)
2022 return;
2023
2024 if(offset > max_offset)
2025 offset = max_offset;
2026
2027
2028 if(spi_offset(STp) == 0 && (spi_period(STp) < hostdata->min_period ||
2029 spi_period(STp) > 0xff))
2030 spi_period(STp) = hostdata->min_period;
2031
2032 spi_offset(STp) = offset;
2033 spi_flags(STp) &= ~(NCR_700_DEV_NEGOTIATED_SYNC |
2034 NCR_700_DEV_BEGIN_SYNC_NEGOTIATION);
2035 spi_flags(STp) |= NCR_700_DEV_PRINT_SYNC_NEGOTIATION;
2036}
2037
2038STATIC int
2039NCR_700_slave_alloc(struct scsi_device *SDp)
2040{
2041 SDp->hostdata = kzalloc(sizeof(struct NCR_700_Device_Parameters),
2042 GFP_KERNEL);
2043
2044 if (!SDp->hostdata)
2045 return -ENOMEM;
2046
2047 return 0;
2048}
2049
2050STATIC int
2051NCR_700_slave_configure(struct scsi_device *SDp)
2052{
2053 struct NCR_700_Host_Parameters *hostdata =
2054 (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
2055
2056
2057 if(SDp->tagged_supported) {
2058 scsi_set_tag_type(SDp, MSG_ORDERED_TAG);
2059 scsi_activate_tcq(SDp, NCR_700_DEFAULT_TAGS);
2060 NCR_700_set_tag_neg_state(SDp, NCR_700_START_TAG_NEGOTIATION);
2061 } else {
2062
2063 scsi_adjust_queue_depth(SDp, 0, SDp->host->cmd_per_lun);
2064 }
2065 if(hostdata->fast) {
2066
2067 if (!spi_initial_dv(SDp->sdev_target))
2068 spi_dv_device(SDp);
2069 } else {
2070 spi_offset(SDp->sdev_target) = 0;
2071 spi_period(SDp->sdev_target) = 0;
2072 }
2073 return 0;
2074}
2075
2076STATIC void
2077NCR_700_slave_destroy(struct scsi_device *SDp)
2078{
2079 kfree(SDp->hostdata);
2080 SDp->hostdata = NULL;
2081}
2082
2083static int
2084NCR_700_change_queue_depth(struct scsi_device *SDp, int depth, int reason)
2085{
2086 if (reason != SCSI_QDEPTH_DEFAULT)
2087 return -EOPNOTSUPP;
2088
2089 if (depth > NCR_700_MAX_TAGS)
2090 depth = NCR_700_MAX_TAGS;
2091
2092 scsi_adjust_queue_depth(SDp, scsi_get_tag_type(SDp), depth);
2093 return depth;
2094}
2095
2096static int NCR_700_change_queue_type(struct scsi_device *SDp, int tag_type)
2097{
2098 int change_tag = ((tag_type ==0 && scsi_get_tag_type(SDp) != 0)
2099 || (tag_type != 0 && scsi_get_tag_type(SDp) == 0));
2100 struct NCR_700_Host_Parameters *hostdata =
2101 (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0];
2102
2103 scsi_set_tag_type(SDp, tag_type);
2104
2105
2106
2107
2108
2109 if (change_tag)
2110 scsi_target_quiesce(SDp->sdev_target);
2111
2112 if (!tag_type) {
2113
2114
2115 scsi_deactivate_tcq(SDp, SDp->host->cmd_per_lun);
2116 hostdata->tag_negotiated &= ~(1 << sdev_id(SDp));
2117 } else {
2118
2119
2120 scsi_activate_tcq(SDp, SDp->queue_depth);
2121 if (change_tag)
2122 NCR_700_set_tag_neg_state(SDp, NCR_700_START_TAG_NEGOTIATION);
2123 }
2124 if (change_tag)
2125 scsi_target_resume(SDp->sdev_target);
2126
2127 return tag_type;
2128}
2129
2130static ssize_t
2131NCR_700_show_active_tags(struct device *dev, struct device_attribute *attr, char *buf)
2132{
2133 struct scsi_device *SDp = to_scsi_device(dev);
2134
2135 return snprintf(buf, 20, "%d\n", NCR_700_get_depth(SDp));
2136}
2137
2138static struct device_attribute NCR_700_active_tags_attr = {
2139 .attr = {
2140 .name = "active_tags",
2141 .mode = S_IRUGO,
2142 },
2143 .show = NCR_700_show_active_tags,
2144};
2145
2146STATIC struct device_attribute *NCR_700_dev_attrs[] = {
2147 &NCR_700_active_tags_attr,
2148 NULL,
2149};
2150
2151EXPORT_SYMBOL(NCR_700_detect);
2152EXPORT_SYMBOL(NCR_700_release);
2153EXPORT_SYMBOL(NCR_700_intr);
2154
2155static struct spi_function_template NCR_700_transport_functions = {
2156 .set_period = NCR_700_set_period,
2157 .show_period = 1,
2158 .set_offset = NCR_700_set_offset,
2159 .show_offset = 1,
2160};
2161
2162static int __init NCR_700_init(void)
2163{
2164 NCR_700_transport_template = spi_attach_transport(&NCR_700_transport_functions);
2165 if(!NCR_700_transport_template)
2166 return -ENODEV;
2167 return 0;
2168}
2169
2170static void __exit NCR_700_exit(void)
2171{
2172 spi_release_transport(NCR_700_transport_template);
2173}
2174
2175module_init(NCR_700_init);
2176module_exit(NCR_700_exit);
2177
2178