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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
blob0d9d1b42b184362ab84a0f3a0c67166ce7719f96
1 /*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 *
7 * This driver is derived from the Linux sym53c8xx driver.
8 * Copyright (C) 1998-2000 Gerard Roudier
9 *
10 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
11 * a port of the FreeBSD ncr driver to Linux-1.2.13.
12 *
13 * The original ncr driver has been written for 386bsd and FreeBSD by
14 * Wolfgang Stanglmeier <wolf@cologne.de>
15 * Stefan Esser <se@mi.Uni-Koeln.de>
16 * Copyright (C) 1994 Wolfgang Stanglmeier
17 *
18 * Other major contributions:
19 *
20 * NVRAM detection and reading.
21 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
22 *
23 *-----------------------------------------------------------------------------
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. The name of the author may not be used to endorse or promote products
31 * derived from this software without specific prior written permission.
32 *
33 * Where this Software is combined with software released under the terms of
34 * the GNU Public License ("GPL") and the terms of the GPL would require the
35 * combined work to also be released under the terms of the GPL, the terms
36 * and conditions of this License will apply in addition to those of the
37 * GPL with the exception of any terms or conditions of this License that
38 * conflict with, or are expressly prohibited by, the GPL.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
44 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 */
52 #define SYM_GLUE_C
53
54 #include <linux/ctype.h>
55 #include <linux/init.h>
56 #include <linux/interrupt.h>
57 #include <linux/module.h>
58 #include <linux/spinlock.h>
59 #include <scsi/scsi.h>
60 #include <scsi/scsi_tcq.h>
61 #include <scsi/scsi_device.h>
62 #include <scsi/scsi_transport.h>
63 #include <scsi/scsi_transport_spi.h>
64
65 #include "sym_glue.h"
66 #include "sym_nvram.h"
67
68 #define NAME53C "sym53c"
69 #define NAME53C8XX "sym53c8xx"
70
71 static int __devinit
72 pci_get_base_address(struct pci_dev *pdev, int index, u_long *base)
73 {
74 u32 tmp;
75 #define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
76
77 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
78 *base = tmp;
79 ++index;
80 if ((tmp & 0x7) == PCI_BASE_ADDRESS_MEM_TYPE_64) {
81 #if BITS_PER_LONG > 32
82 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
83 *base |= (((u_long)tmp) << 32);
84 #endif
85 ++index;
86 }
87 return index;
88 #undef PCI_BAR_OFFSET
89 }
90
91 /* This lock protects only the memory allocation/free. */
92 spinlock_t sym53c8xx_lock = SPIN_LOCK_UNLOCKED;
93
94 static struct scsi_transport_template *sym2_transport_template = NULL;
95
96 /*
97 * Wrappers to the generic memory allocator.
98 */
99 void *sym_calloc(int size, char *name)
100 {
101 unsigned long flags;
102 void *m;
103 spin_lock_irqsave(&sym53c8xx_lock, flags);
104 m = sym_calloc_unlocked(size, name);
105 spin_unlock_irqrestore(&sym53c8xx_lock, flags);
106 return m;
107 }
108
109 void sym_mfree(void *m, int size, char *name)
110 {
111 unsigned long flags;
112 spin_lock_irqsave(&sym53c8xx_lock, flags);
113 sym_mfree_unlocked(m, size, name);
114 spin_unlock_irqrestore(&sym53c8xx_lock, flags);
115 }
116
117 void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name)
118 {
119 unsigned long flags;
120 void *m;
121 spin_lock_irqsave(&sym53c8xx_lock, flags);
122 m = __sym_calloc_dma_unlocked(dev_dmat, size, name);
123 spin_unlock_irqrestore(&sym53c8xx_lock, flags);
124 return m;
125 }
126
127 void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name)
128 {
129 unsigned long flags;
130 spin_lock_irqsave(&sym53c8xx_lock, flags);
131 __sym_mfree_dma_unlocked(dev_dmat, m, size, name);
132 spin_unlock_irqrestore(&sym53c8xx_lock, flags);
133 }
134
135 m_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m)
136 {
137 unsigned long flags;
138 m_addr_t b;
139 spin_lock_irqsave(&sym53c8xx_lock, flags);
140 b = __vtobus_unlocked(dev_dmat, m);
141 spin_unlock_irqrestore(&sym53c8xx_lock, flags);
142 return b;
143 }
144
145 /*
146 * Used by the eh thread to wait for command completion.
147 * It is allocated on the eh thread stack.
148 */
149 struct sym_eh_wait {
150 struct semaphore sem;
151 struct timer_list timer;
152 void (*old_done)(struct scsi_cmnd *);
153 int to_do;
154 int timed_out;
155 };
156
157 /*
158 * Driver private area in the SCSI command structure.
159 */
160 struct sym_ucmd { /* Override the SCSI pointer structure */
161 SYM_QUEHEAD link_cmdq; /* Must stay at offset ZERO */
162 dma_addr_t data_mapping;
163 u_char data_mapped;
164 struct sym_eh_wait *eh_wait;
165 };
166
167 #define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
168 #define SYM_SCMD_PTR(ucmd) sym_que_entry(ucmd, struct scsi_cmnd, SCp)
169 #define SYM_SOFTC_PTR(cmd) (((struct host_data *)cmd->device->host->hostdata)->ncb)
170
171 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
172 {
173 int dma_dir = cmd->sc_data_direction;
174
175 switch(SYM_UCMD_PTR(cmd)->data_mapped) {
176 case 2:
177 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
178 break;
179 case 1:
180 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
181 cmd->request_bufflen, dma_dir);
182 break;
183 }
184 SYM_UCMD_PTR(cmd)->data_mapped = 0;
185 }
186
187 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
188 {
189 dma_addr_t mapping;
190 int dma_dir = cmd->sc_data_direction;
191
192 mapping = pci_map_single(pdev, cmd->request_buffer,
193 cmd->request_bufflen, dma_dir);
194 if (mapping) {
195 SYM_UCMD_PTR(cmd)->data_mapped = 1;
196 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
197 }
198
199 return mapping;
200 }
201
202 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
203 {
204 int use_sg;
205 int dma_dir = cmd->sc_data_direction;
206
207 use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
208 if (use_sg > 0) {
209 SYM_UCMD_PTR(cmd)->data_mapped = 2;
210 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
211 }
212
213 return use_sg;
214 }
215
216 #define unmap_scsi_data(np, cmd) \
217 __unmap_scsi_data(np->s.device, cmd)
218 #define map_scsi_single_data(np, cmd) \
219 __map_scsi_single_data(np->s.device, cmd)
220 #define map_scsi_sg_data(np, cmd) \
221 __map_scsi_sg_data(np->s.device, cmd)
222 /*
223 * Complete a pending CAM CCB.
224 */
225 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *ccb)
226 {
227 sym_remque(&SYM_UCMD_PTR(ccb)->link_cmdq);
228 unmap_scsi_data(np, ccb);
229 ccb->scsi_done(ccb);
230 }
231
232 void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *ccb, int cam_status)
233 {
234 sym_set_cam_status(ccb, cam_status);
235 sym_xpt_done(np, ccb);
236 }
237
238
239 /*
240 * Print something that identifies the IO.
241 */
242 void sym_print_addr(struct sym_ccb *cp)
243 {
244 struct scsi_cmnd *cmd = cp->cam_ccb;
245 if (cmd)
246 printf("%s:%d:%d:", sym_name(SYM_SOFTC_PTR(cmd)),
247 cmd->device->id, cmd->device->lun);
248 }
249
250 /*
251 * Tell the SCSI layer about a BUS RESET.
252 */
253 void sym_xpt_async_bus_reset(struct sym_hcb *np)
254 {
255 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
256 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
257 np->s.settle_time_valid = 1;
258 if (sym_verbose >= 2)
259 printf_info("%s: command processing suspended for %d seconds\n",
260 sym_name(np), sym_driver_setup.settle_delay);
261 }
262
263 /*
264 * Tell the SCSI layer about a BUS DEVICE RESET message sent.
265 */
266 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
267 {
268 printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
269 }
270
271 /*
272 * Tell the SCSI layer about the new transfer parameters.
273 */
274 void sym_xpt_async_nego_wide(struct sym_hcb *np, int target)
275 {
276 if (sym_verbose < 3)
277 return;
278 sym_announce_transfer_rate(np, target);
279 }
280
281 /*
282 * Choose the more appropriate CAM status if
283 * the IO encountered an extended error.
284 */
285 static int sym_xerr_cam_status(int cam_status, int x_status)
286 {
287 if (x_status) {
288 if (x_status & XE_PARITY_ERR)
289 cam_status = DID_PARITY;
290 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
291 cam_status = DID_ERROR;
292 else if (x_status & XE_BAD_PHASE)
293 cam_status = DID_ERROR;
294 else
295 cam_status = DID_ERROR;
296 }
297 return cam_status;
298 }
299
300 /*
301 * Build CAM result for a failed or auto-sensed IO.
302 */
303 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
304 {
305 struct scsi_cmnd *csio = cp->cam_ccb;
306 u_int cam_status, scsi_status, drv_status;
307
308 drv_status = 0;
309 cam_status = DID_OK;
310 scsi_status = cp->ssss_status;
311
312 if (cp->host_flags & HF_SENSE) {
313 scsi_status = cp->sv_scsi_status;
314 resid = cp->sv_resid;
315 if (sym_verbose && cp->sv_xerr_status)
316 sym_print_xerr(cp, cp->sv_xerr_status);
317 if (cp->host_status == HS_COMPLETE &&
318 cp->ssss_status == S_GOOD &&
319 cp->xerr_status == 0) {
320 cam_status = sym_xerr_cam_status(DID_OK,
321 cp->sv_xerr_status);
322 drv_status = DRIVER_SENSE;
323 /*
324 * Bounce back the sense data to user.
325 */
326 bzero(&csio->sense_buffer, sizeof(csio->sense_buffer));
327 memcpy(csio->sense_buffer, cp->sns_bbuf,
328 min(sizeof(csio->sense_buffer),
329 (size_t)SYM_SNS_BBUF_LEN));
330 #if 0
331 /*
332 * If the device reports a UNIT ATTENTION condition
333 * due to a RESET condition, we should consider all
334 * disconnect CCBs for this unit as aborted.
335 */
336 if (1) {
337 u_char *p;
338 p = (u_char *) csio->sense_data;
339 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
340 sym_clear_tasks(np, DID_ABORT,
341 cp->target,cp->lun, -1);
342 }
343 #endif
344 } else {
345 /*
346 * Error return from our internal request sense. This
347 * is bad: we must clear the contingent allegiance
348 * condition otherwise the device will always return
349 * BUSY. Use a big stick.
350 */
351 sym_reset_scsi_target(np, csio->device->id);
352 cam_status = DID_ERROR;
353 }
354 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
355 cam_status = DID_OK;
356 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
357 cam_status = DID_NO_CONNECT;
358 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
359 cam_status = DID_ERROR;
360 else { /* Extended error */
361 if (sym_verbose) {
362 PRINT_ADDR(cp);
363 printf ("COMMAND FAILED (%x %x %x).\n",
364 cp->host_status, cp->ssss_status,
365 cp->xerr_status);
366 }
367 /*
368 * Set the most appropriate value for CAM status.
369 */
370 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
371 }
372 csio->resid = resid;
373 csio->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
374 }
375
376
377 /*
378 * Build the scatter/gather array for an I/O.
379 */
380
381 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
382 {
383 struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
384 int segment;
385
386 cp->data_len = cmd->request_bufflen;
387
388 if (cmd->request_bufflen) {
389 dma_addr_t baddr = map_scsi_single_data(np, cmd);
390 if (baddr) {
391 sym_build_sge(np, data, baddr, cmd->request_bufflen);
392 segment = 1;
393 } else {
394 segment = -2;
395 }
396 } else {
397 segment = 0;
398 }
399
400 return segment;
401 }
402
403 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
404 {
405 int segment;
406 int use_sg = (int) cmd->use_sg;
407
408 cp->data_len = 0;
409
410 if (!use_sg)
411 segment = sym_scatter_no_sglist(np, cp, cmd);
412 else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
413 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
414 struct sym_tblmove *data;
415
416 if (use_sg > SYM_CONF_MAX_SG) {
417 unmap_scsi_data(np, cmd);
418 return -1;
419 }
420
421 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
422
423 for (segment = 0; segment < use_sg; segment++) {
424 dma_addr_t baddr = sg_dma_address(&scatter[segment]);
425 unsigned int len = sg_dma_len(&scatter[segment]);
426
427 sym_build_sge(np, &data[segment], baddr, len);
428 cp->data_len += len;
429 }
430 } else {
431 segment = -2;
432 }
433
434 return segment;
435 }
436
437 /*
438 * Queue a SCSI command.
439 */
440 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *ccb)
441 {
442 /* struct scsi_device *device = ccb->device; */
443 struct sym_tcb *tp;
444 struct sym_lcb *lp;
445 struct sym_ccb *cp;
446 int order;
447
448 /*
449 * Minimal checkings, so that we will not
450 * go outside our tables.
451 */
452 if (ccb->device->id == np->myaddr ||
453 ccb->device->id >= SYM_CONF_MAX_TARGET ||
454 ccb->device->lun >= SYM_CONF_MAX_LUN) {
455 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
456 return 0;
457 }
458
459 /*
460 * Retreive the target descriptor.
461 */
462 tp = &np->target[ccb->device->id];
463
464 /*
465 * Complete the 1st INQUIRY command with error
466 * condition if the device is flagged NOSCAN
467 * at BOOT in the NVRAM. This may speed up
468 * the boot and maintain coherency with BIOS
469 * device numbering. Clearing the flag allows
470 * user to rescan skipped devices later.
471 * We also return error for devices not flagged
472 * for SCAN LUNS in the NVRAM since some mono-lun
473 * devices behave badly when asked for some non
474 * zero LUN. Btw, this is an absolute hack.:-)
475 */
476 if (ccb->cmnd[0] == 0x12 || ccb->cmnd[0] == 0x0) {
477 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
478 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
479 ccb->device->lun != 0)) {
480 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
481 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
482 return 0;
483 }
484 }
485
486 /*
487 * Select tagged/untagged.
488 */
489 lp = sym_lp(np, tp, ccb->device->lun);
490 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
491
492 /*
493 * Queue the SCSI IO.
494 */
495 cp = sym_get_ccb(np, ccb->device->id, ccb->device->lun, order);
496 if (!cp)
497 return 1; /* Means resource shortage */
498 sym_queue_scsiio(np, ccb, cp);
499 return 0;
500 }
501
502 /*
503 * Setup buffers and pointers that address the CDB.
504 */
505 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *ccb, struct sym_ccb *cp)
506 {
507 u32 cmd_ba;
508 int cmd_len;
509
510 /*
511 * CDB is 16 bytes max.
512 */
513 if (ccb->cmd_len > sizeof(cp->cdb_buf)) {
514 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
515 return -1;
516 }
517
518 memcpy(cp->cdb_buf, ccb->cmnd, ccb->cmd_len);
519 cmd_ba = CCB_BA (cp, cdb_buf[0]);
520 cmd_len = ccb->cmd_len;
521
522 cp->phys.cmd.addr = cpu_to_scr(cmd_ba);
523 cp->phys.cmd.size = cpu_to_scr(cmd_len);
524
525 return 0;
526 }
527
528 /*
529 * Setup pointers that address the data and start the I/O.
530 */
531 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp)
532 {
533 int dir;
534 struct sym_tcb *tp = &np->target[cp->target];
535 struct sym_lcb *lp = sym_lp(np, tp, cp->lun);
536
537 /*
538 * Build the CDB.
539 */
540 if (sym_setup_cdb(np, csio, cp))
541 goto out_abort;
542
543 /*
544 * No direction means no data.
545 */
546 dir = csio->sc_data_direction;
547 if (dir != DMA_NONE) {
548 cp->segments = sym_scatter(np, cp, csio);
549 if (cp->segments < 0) {
550 if (cp->segments == -2)
551 sym_set_cam_status(csio, CAM_RESRC_UNAVAIL);
552 else
553 sym_set_cam_status(csio, CAM_REQ_TOO_BIG);
554 goto out_abort;
555 }
556 } else {
557 cp->data_len = 0;
558 cp->segments = 0;
559 }
560
561 /*
562 * Set data pointers.
563 */
564 sym_setup_data_pointers(np, cp, dir);
565
566 /*
567 * When `#ifed 1', the code below makes the driver
568 * panic on the first attempt to write to a SCSI device.
569 * It is the first test we want to do after a driver
570 * change that does not seem obviously safe. :)
571 */
572 #if 0
573 switch (cp->cdb_buf[0]) {
574 case 0x0A: case 0x2A: case 0xAA:
575 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
576 MDELAY(10000);
577 break;
578 default:
579 break;
580 }
581 #endif
582
583 /*
584 * activate this job.
585 */
586 if (lp)
587 sym_start_next_ccbs(np, lp, 2);
588 else
589 sym_put_start_queue(np, cp);
590 return 0;
591
592 out_abort:
593 sym_free_ccb(np, cp);
594 sym_xpt_done(np, csio);
595 return 0;
596 }
597
598
599 /*
600 * timer daemon.
601 *
602 * Misused to keep the driver running when
603 * interrupts are not configured correctly.
604 */
605 static void sym_timer(struct sym_hcb *np)
606 {
607 unsigned long thistime = jiffies;
608
609 /*
610 * Restart the timer.
611 */
612 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
613 add_timer(&np->s.timer);
614
615 /*
616 * If we are resetting the ncr, wait for settle_time before
617 * clearing it. Then command processing will be resumed.
618 */
619 if (np->s.settle_time_valid) {
620 if (time_before_eq(np->s.settle_time, thistime)) {
621 if (sym_verbose >= 2 )
622 printk("%s: command processing resumed\n",
623 sym_name(np));
624 np->s.settle_time_valid = 0;
625 }
626 return;
627 }
628
629 /*
630 * Nothing to do for now, but that may come.
631 */
632 if (np->s.lasttime + 4*HZ < thistime) {
633 np->s.lasttime = thistime;
634 }
635
636 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
637 /*
638 * Some way-broken PCI bridges may lead to
639 * completions being lost when the clearing
640 * of the INTFLY flag by the CPU occurs
641 * concurrently with the chip raising this flag.
642 * If this ever happen, lost completions will
643 * be reaped here.
644 */
645 sym_wakeup_done(np);
646 #endif
647 }
648
649
650 /*
651 * PCI BUS error handler.
652 */
653 void sym_log_bus_error(struct sym_hcb *np)
654 {
655 u_short pci_sts;
656 pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
657 if (pci_sts & 0xf900) {
658 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
659 printf("%s: PCI STATUS = 0x%04x\n",
660 sym_name(np), pci_sts & 0xf900);
661 }
662 }
663
664
665 /*
666 * Requeue awaiting commands.
667 */
668 static void sym_requeue_awaiting_cmds(struct sym_hcb *np)
669 {
670 struct sym_ucmd *ucp;
671 SYM_QUEHEAD tmp_cmdq;
672 int sts;
673
674 sym_que_move(&np->s.wait_cmdq, &tmp_cmdq);
675
676 while ((ucp = (struct sym_ucmd *) sym_remque_head(&tmp_cmdq)) != 0) {
677 struct scsi_cmnd *cmd;
678
679 sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
680 cmd = SYM_SCMD_PTR(ucp);
681 sts = sym_queue_command(np, cmd);
682 if (sts) {
683 sym_remque(&ucp->link_cmdq);
684 sym_insque_head(&ucp->link_cmdq, &np->s.wait_cmdq);
685 }
686 }
687 }
688
689 /*
690 * queuecommand method. Entered with the host adapter lock held and
691 * interrupts disabled.
692 */
693 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
694 void (*done)(struct scsi_cmnd *))
695 {
696 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
697 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
698 int sts = 0;
699
700 cmd->scsi_done = done;
701 cmd->host_scribble = NULL;
702 memset(ucp, 0, sizeof(*ucp));
703
704 /*
705 * Shorten our settle_time if needed for
706 * this command not to time out.
707 */
708 if (np->s.settle_time_valid && cmd->timeout_per_command) {
709 unsigned long tlimit = jiffies + cmd->timeout_per_command;
710 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
711 if (time_after(np->s.settle_time, tlimit)) {
712 np->s.settle_time = tlimit;
713 }
714 }
715
716 if (np->s.settle_time_valid || !sym_que_empty(&np->s.wait_cmdq)) {
717 sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
718 goto out;
719 }
720
721 sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
722 sts = sym_queue_command(np, cmd);
723 if (sts) {
724 sym_remque(&ucp->link_cmdq);
725 sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
726 }
727 out:
728 return 0;
729 }
730
731 /*
732 * Linux entry point of the interrupt handler.
733 */
734 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
735 {
736 unsigned long flags;
737 struct sym_hcb *np = (struct sym_hcb *)dev_id;
738
739 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
740
741 spin_lock_irqsave(np->s.host->host_lock, flags);
742
743 sym_interrupt(np);
744
745 /*
746 * push queue walk-through to tasklet
747 */
748 if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
749 sym_requeue_awaiting_cmds(np);
750
751 spin_unlock_irqrestore(np->s.host->host_lock, flags);
752
753 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
754
755 return IRQ_HANDLED;
756 }
757
758 /*
759 * Linux entry point of the timer handler
760 */
761 static void sym53c8xx_timer(unsigned long npref)
762 {
763 struct sym_hcb *np = (struct sym_hcb *)npref;
764 unsigned long flags;
765
766 spin_lock_irqsave(np->s.host->host_lock, flags);
767
768 sym_timer(np);
769
770 if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
771 sym_requeue_awaiting_cmds(np);
772
773 spin_unlock_irqrestore(np->s.host->host_lock, flags);
774 }
775
776
777 /*
778 * What the eh thread wants us to perform.
779 */
780 #define SYM_EH_ABORT 0
781 #define SYM_EH_DEVICE_RESET 1
782 #define SYM_EH_BUS_RESET 2
783 #define SYM_EH_HOST_RESET 3
784
785 /*
786 * What we will do regarding the involved SCSI command.
787 */
788 #define SYM_EH_DO_IGNORE 0
789 #define SYM_EH_DO_COMPLETE 1
790 #define SYM_EH_DO_WAIT 2
791
792 /*
793 * Our general completion handler.
794 */
795 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
796 {
797 struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
798 if (!ep)
799 return;
800
801 /* Try to avoid a race here (not 100% safe) */
802 if (!timed_out) {
803 ep->timed_out = 0;
804 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
805 return;
806 }
807
808 /* Revert everything */
809 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
810 cmd->scsi_done = ep->old_done;
811
812 /* Wake up the eh thread if it wants to sleep */
813 if (ep->to_do == SYM_EH_DO_WAIT)
814 up(&ep->sem);
815 }
816
817 /*
818 * scsi_done() alias when error recovery is in progress.
819 */
820 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
821
822 /*
823 * Some timeout handler to avoid waiting too long.
824 */
825 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
826
827 /*
828 * Generic method for our eh processing.
829 * The 'op' argument tells what we have to do.
830 */
831 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
832 {
833 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
834 SYM_QUEHEAD *qp;
835 int to_do = SYM_EH_DO_IGNORE;
836 int sts = -1;
837 struct sym_eh_wait eh, *ep = &eh;
838 char devname[20];
839
840 sprintf(devname, "%s:%d:%d", sym_name(np), cmd->device->id, cmd->device->lun);
841
842 printf_warning("%s: %s operation started.\n", devname, opname);
843
844 #if 0
845 /* This one should be the result of some race, thus to ignore */
846 if (cmd->serial_number != cmd->serial_number_at_timeout)
847 goto prepare;
848 #endif
849
850 /* This one is not queued to the core driver -> to complete here */
851 FOR_EACH_QUEUED_ELEMENT(&np->s.wait_cmdq, qp) {
852 if (SYM_SCMD_PTR(qp) == cmd) {
853 to_do = SYM_EH_DO_COMPLETE;
854 goto prepare;
855 }
856 }
857
858 /* This one is queued in some place -> to wait for completion */
859 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
860 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
861 if (cp->cam_ccb == cmd) {
862 to_do = SYM_EH_DO_WAIT;
863 goto prepare;
864 }
865 }
866
867 prepare:
868 /* Prepare stuff to either ignore, complete or wait for completion */
869 switch(to_do) {
870 default:
871 case SYM_EH_DO_IGNORE:
872 break;
873 case SYM_EH_DO_WAIT:
874 init_MUTEX_LOCKED(&ep->sem);
875 /* fall through */
876 case SYM_EH_DO_COMPLETE:
877 ep->old_done = cmd->scsi_done;
878 cmd->scsi_done = sym_eh_done;
879 SYM_UCMD_PTR(cmd)->eh_wait = ep;
880 }
881
882 /* Try to proceed the operation we have been asked for */
883 sts = -1;
884 switch(op) {
885 case SYM_EH_ABORT:
886 sts = sym_abort_scsiio(np, cmd, 1);
887 break;
888 case SYM_EH_DEVICE_RESET:
889 sts = sym_reset_scsi_target(np, cmd->device->id);
890 break;
891 case SYM_EH_BUS_RESET:
892 sym_reset_scsi_bus(np, 1);
893 sts = 0;
894 break;
895 case SYM_EH_HOST_RESET:
896 sym_reset_scsi_bus(np, 0);
897 sym_start_up (np, 1);
898 sts = 0;
899 break;
900 default:
901 break;
902 }
903
904 /* On error, restore everything and cross fingers :) */
905 if (sts) {
906 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
907 cmd->scsi_done = ep->old_done;
908 to_do = SYM_EH_DO_IGNORE;
909 }
910
911 ep->to_do = to_do;
912 /* Complete the command with locks held as required by the driver */
913 if (to_do == SYM_EH_DO_COMPLETE)
914 sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
915
916 /* Wait for completion with locks released, as required by kernel */
917 if (to_do == SYM_EH_DO_WAIT) {
918 init_timer(&ep->timer);
919 ep->timer.expires = jiffies + (5*HZ);
920 ep->timer.function = sym_eh_timeout;
921 ep->timer.data = (u_long)cmd;
922 ep->timed_out = 1; /* Be pessimistic for once :) */
923 add_timer(&ep->timer);
924 spin_unlock_irq(np->s.host->host_lock);
925 down(&ep->sem);
926 spin_lock_irq(np->s.host->host_lock);
927 if (ep->timed_out)
928 sts = -2;
929 }
930 printf_warning("%s: %s operation %s.\n", devname, opname,
931 sts==0?"complete":sts==-2?"timed-out":"failed");
932 return sts? SCSI_FAILED : SCSI_SUCCESS;
933 }
934
935
936 /*
937 * Error handlers called from the eh thread (one thread per HBA).
938 */
939 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
940 {
941 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
942 }
943
944 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
945 {
946 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
947 }
948
949 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
950 {
951 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
952 }
953
954 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
955 {
956 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
957 }
958
959 /*
960 * Tune device queuing depth, according to various limits.
961 */
962 static void sym_tune_dev_queuing(struct sym_hcb *np, int target, int lun, u_short reqtags)
963 {
964 struct sym_tcb *tp = &np->target[target];
965 struct sym_lcb *lp = sym_lp(np, tp, lun);
966 u_short oldtags;
967
968 if (!lp)
969 return;
970
971 oldtags = lp->s.reqtags;
972
973 if (reqtags > lp->s.scdev_depth)
974 reqtags = lp->s.scdev_depth;
975
976 lp->started_limit = reqtags ? reqtags : 2;
977 lp->started_max = 1;
978 lp->s.reqtags = reqtags;
979
980 if (reqtags != oldtags) {
981 printf_info("%s:%d:%d: "
982 "tagged command queuing %s, command queue depth %d.\n",
983 sym_name(np), target, lun,
984 lp->s.reqtags ? "enabled" : "disabled",
985 lp->started_limit);
986 }
987 }
988
989 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
990 /*
991 * Linux select queue depths function
992 */
993 #define DEF_DEPTH (sym_driver_setup.max_tag)
994 #define ALL_TARGETS -2
995 #define NO_TARGET -1
996 #define ALL_LUNS -2
997 #define NO_LUN -1
998
999 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
1000 {
1001 int c, h, t, u, v;
1002 char *p = sym_driver_setup.tag_ctrl;
1003 char *ep;
1004
1005 h = -1;
1006 t = NO_TARGET;
1007 u = NO_LUN;
1008 while ((c = *p++) != 0) {
1009 v = simple_strtoul(p, &ep, 0);
1010 switch(c) {
1011 case '/':
1012 ++h;
1013 t = ALL_TARGETS;
1014 u = ALL_LUNS;
1015 break;
1016 case 't':
1017 if (t != target)
1018 t = (target == v) ? v : NO_TARGET;
1019 u = ALL_LUNS;
1020 break;
1021 case 'u':
1022 if (u != lun)
1023 u = (lun == v) ? v : NO_LUN;
1024 break;
1025 case 'q':
1026 if (h == np->s.unit &&
1027 (t == ALL_TARGETS || t == target) &&
1028 (u == ALL_LUNS || u == lun))
1029 return v;
1030 break;
1031 case '-':
1032 t = ALL_TARGETS;
1033 u = ALL_LUNS;
1034 break;
1035 default:
1036 break;
1037 }
1038 p = ep;
1039 }
1040 return DEF_DEPTH;
1041 }
1042 #else
1043 #define device_queue_depth(np, t, l) (sym_driver_setup.max_tag)
1044 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
1045
1046 /*
1047 * Linux entry point for device queue sizing.
1048 */
1049 static int sym53c8xx_slave_configure(struct scsi_device *device)
1050 {
1051 struct Scsi_Host *host = device->host;
1052 struct sym_hcb *np;
1053 struct sym_tcb *tp;
1054 struct sym_lcb *lp;
1055 int reqtags, depth_to_use;
1056
1057 np = ((struct host_data *) host->hostdata)->ncb;
1058 tp = &np->target[device->id];
1059 tp->sdev = device;
1060
1061 /*
1062 * Allocate the LCB if not yet.
1063 * If it fail, we may well be in the sh*t. :)
1064 */
1065 lp = sym_alloc_lcb(np, device->id, device->lun);
1066 if (!lp)
1067 return -ENOMEM;
1068
1069 /*
1070 * Get user flags.
1071 */
1072 lp->curr_flags = lp->user_flags;
1073
1074 /*
1075 * Select queue depth from driver setup.
1076 * Donnot use more than configured by user.
1077 * Use at least 2.
1078 * Donnot use more than our maximum.
1079 */
1080 reqtags = device_queue_depth(np, device->id, device->lun);
1081 if (reqtags > tp->usrtags)
1082 reqtags = tp->usrtags;
1083 if (!device->tagged_supported)
1084 reqtags = 0;
1085 #if 1 /* Avoid to locally queue commands for no good reasons */
1086 if (reqtags > SYM_CONF_MAX_TAG)
1087 reqtags = SYM_CONF_MAX_TAG;
1088 depth_to_use = (reqtags ? reqtags : 2);
1089 #else
1090 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1091 #endif
1092 scsi_adjust_queue_depth(device,
1093 (device->tagged_supported ?
1094 MSG_SIMPLE_TAG : 0),
1095 depth_to_use);
1096 lp->s.scdev_depth = depth_to_use;
1097 sym_tune_dev_queuing(np, device->id, device->lun, reqtags);
1098
1099 spi_dv_device(device);
1100
1101 return 0;
1102 }
1103
1104 /*
1105 * Linux entry point for info() function
1106 */
1107 static const char *sym53c8xx_info (struct Scsi_Host *host)
1108 {
1109 return sym_driver_name();
1110 }
1111
1112
1113 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1114 /*
1115 * Proc file system stuff
1116 *
1117 * A read operation returns adapter information.
1118 * A write operation is a control command.
1119 * The string is parsed in the driver code and the command is passed
1120 * to the sym_usercmd() function.
1121 */
1122
1123 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1124
1125 struct sym_usrcmd {
1126 u_long target;
1127 u_long lun;
1128 u_long data;
1129 u_long cmd;
1130 };
1131
1132 #define UC_SETSYNC 10
1133 #define UC_SETTAGS 11
1134 #define UC_SETDEBUG 12
1135 #define UC_SETWIDE 14
1136 #define UC_SETFLAG 15
1137 #define UC_SETVERBOSE 17
1138 #define UC_RESETDEV 18
1139 #define UC_CLEARDEV 19
1140
1141 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1142 {
1143 struct sym_tcb *tp;
1144 int t, l;
1145
1146 switch (uc->cmd) {
1147 case 0: return;
1148
1149 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1150 case UC_SETDEBUG:
1151 sym_debug_flags = uc->data;
1152 break;
1153 #endif
1154 case UC_SETVERBOSE:
1155 np->verbose = uc->data;
1156 break;
1157 default:
1158 /*
1159 * We assume that other commands apply to targets.
1160 * This should always be the case and avoid the below
1161 * 4 lines to be repeated 6 times.
1162 */
1163 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1164 if (!((uc->target >> t) & 1))
1165 continue;
1166 tp = &np->target[t];
1167
1168 switch (uc->cmd) {
1169
1170 case UC_SETSYNC:
1171 if (!uc->data || uc->data >= 255) {
1172 tp->tinfo.goal.options = 0;
1173 tp->tinfo.goal.offset = 0;
1174 break;
1175 }
1176 if (uc->data <= 9 && np->minsync_dt) {
1177 if (uc->data < np->minsync_dt)
1178 uc->data = np->minsync_dt;
1179 tp->tinfo.goal.options = PPR_OPT_DT;
1180 tp->tinfo.goal.width = 1;
1181 tp->tinfo.goal.period = uc->data;
1182 tp->tinfo.goal.offset = np->maxoffs_dt;
1183 } else {
1184 if (uc->data < np->minsync)
1185 uc->data = np->minsync;
1186 tp->tinfo.goal.options = 0;
1187 tp->tinfo.goal.period = uc->data;
1188 tp->tinfo.goal.offset = np->maxoffs;
1189 }
1190 break;
1191 case UC_SETWIDE:
1192 tp->tinfo.goal.width = uc->data ? 1 : 0;
1193 break;
1194 case UC_SETTAGS:
1195 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1196 sym_tune_dev_queuing(np, t,l, uc->data);
1197 break;
1198 case UC_RESETDEV:
1199 tp->to_reset = 1;
1200 np->istat_sem = SEM;
1201 OUTB (nc_istat, SIGP|SEM);
1202 break;
1203 case UC_CLEARDEV:
1204 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1205 struct sym_lcb *lp = sym_lp(np, tp, l);
1206 if (lp) lp->to_clear = 1;
1207 }
1208 np->istat_sem = SEM;
1209 OUTB (nc_istat, SIGP|SEM);
1210 break;
1211 case UC_SETFLAG:
1212 tp->usrflags = uc->data;
1213 break;
1214 }
1215 }
1216 break;
1217 }
1218 }
1219
1220 #define digit_to_bin(c) ((c) - '0')
1221
1222 static int skip_spaces(char *ptr, int len)
1223 {
1224 int cnt, c;
1225
1226 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1227
1228 return (len - cnt);
1229 }
1230
1231 static int get_int_arg(char *ptr, int len, u_long *pv)
1232 {
1233 int cnt, c;
1234 u_long v;
1235
1236 for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && isdigit(c); cnt--) {
1237 v = (v * 10) + digit_to_bin(c);
1238 }
1239
1240 if (pv)
1241 *pv = v;
1242
1243 return (len - cnt);
1244 }
1245
1246 static int is_keyword(char *ptr, int len, char *verb)
1247 {
1248 int verb_len = strlen(verb);
1249
1250 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1251 return verb_len;
1252 else
1253 return 0;
1254
1255 }
1256
1257 #define SKIP_SPACES(min_spaces) \
1258 if ((arg_len = skip_spaces(ptr, len)) < (min_spaces)) \
1259 return -EINVAL; \
1260 ptr += arg_len; len -= arg_len;
1261
1262 #define GET_INT_ARG(v) \
1263 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1264 return -EINVAL; \
1265 ptr += arg_len; len -= arg_len;
1266
1267
1268 /*
1269 * Parse a control command
1270 */
1271
1272 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1273 {
1274 char *ptr = buffer;
1275 int len = length;
1276 struct sym_usrcmd cmd, *uc = &cmd;
1277 int arg_len;
1278 u_long target;
1279
1280 bzero(uc, sizeof(*uc));
1281
1282 if (len > 0 && ptr[len-1] == '\n')
1283 --len;
1284
1285 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1286 uc->cmd = UC_SETSYNC;
1287 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1288 uc->cmd = UC_SETTAGS;
1289 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1290 uc->cmd = UC_SETVERBOSE;
1291 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1292 uc->cmd = UC_SETWIDE;
1293 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1294 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1295 uc->cmd = UC_SETDEBUG;
1296 #endif
1297 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1298 uc->cmd = UC_SETFLAG;
1299 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1300 uc->cmd = UC_RESETDEV;
1301 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1302 uc->cmd = UC_CLEARDEV;
1303 else
1304 arg_len = 0;
1305
1306 #ifdef DEBUG_PROC_INFO
1307 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1308 #endif
1309
1310 if (!arg_len)
1311 return -EINVAL;
1312 ptr += arg_len; len -= arg_len;
1313
1314 switch(uc->cmd) {
1315 case UC_SETSYNC:
1316 case UC_SETTAGS:
1317 case UC_SETWIDE:
1318 case UC_SETFLAG:
1319 case UC_RESETDEV:
1320 case UC_CLEARDEV:
1321 SKIP_SPACES(1);
1322 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1323 ptr += arg_len; len -= arg_len;
1324 uc->target = ~0;
1325 } else {
1326 GET_INT_ARG(target);
1327 uc->target = (1<<target);
1328 #ifdef DEBUG_PROC_INFO
1329 printk("sym_user_command: target=%ld\n", target);
1330 #endif
1331 }
1332 break;
1333 }
1334
1335 switch(uc->cmd) {
1336 case UC_SETVERBOSE:
1337 case UC_SETSYNC:
1338 case UC_SETTAGS:
1339 case UC_SETWIDE:
1340 SKIP_SPACES(1);
1341 GET_INT_ARG(uc->data);
1342 #ifdef DEBUG_PROC_INFO
1343 printk("sym_user_command: data=%ld\n", uc->data);
1344 #endif
1345 break;
1346 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1347 case UC_SETDEBUG:
1348 while (len > 0) {
1349 SKIP_SPACES(1);
1350 if ((arg_len = is_keyword(ptr, len, "alloc")))
1351 uc->data |= DEBUG_ALLOC;
1352 else if ((arg_len = is_keyword(ptr, len, "phase")))
1353 uc->data |= DEBUG_PHASE;
1354 else if ((arg_len = is_keyword(ptr, len, "queue")))
1355 uc->data |= DEBUG_QUEUE;
1356 else if ((arg_len = is_keyword(ptr, len, "result")))
1357 uc->data |= DEBUG_RESULT;
1358 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1359 uc->data |= DEBUG_SCATTER;
1360 else if ((arg_len = is_keyword(ptr, len, "script")))
1361 uc->data |= DEBUG_SCRIPT;
1362 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1363 uc->data |= DEBUG_TINY;
1364 else if ((arg_len = is_keyword(ptr, len, "timing")))
1365 uc->data |= DEBUG_TIMING;
1366 else if ((arg_len = is_keyword(ptr, len, "nego")))
1367 uc->data |= DEBUG_NEGO;
1368 else if ((arg_len = is_keyword(ptr, len, "tags")))
1369 uc->data |= DEBUG_TAGS;
1370 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1371 uc->data |= DEBUG_POINTER;
1372 else
1373 return -EINVAL;
1374 ptr += arg_len; len -= arg_len;
1375 }
1376 #ifdef DEBUG_PROC_INFO
1377 printk("sym_user_command: data=%ld\n", uc->data);
1378 #endif
1379 break;
1380 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1381 case UC_SETFLAG:
1382 while (len > 0) {
1383 SKIP_SPACES(1);
1384 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1385 uc->data &= ~SYM_DISC_ENABLED;
1386 else
1387 return -EINVAL;
1388 ptr += arg_len; len -= arg_len;
1389 }
1390 break;
1391 default:
1392 break;
1393 }
1394
1395 if (len)
1396 return -EINVAL;
1397 else {
1398 unsigned long flags;
1399
1400 spin_lock_irqsave(np->s.host->host_lock, flags);
1401 sym_exec_user_command (np, uc);
1402 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1403 }
1404 return length;
1405 }
1406
1407 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1408
1409
1410 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1411 /*
1412 * Informations through the proc file system.
1413 */
1414 struct info_str {
1415 char *buffer;
1416 int length;
1417 int offset;
1418 int pos;
1419 };
1420
1421 static void copy_mem_info(struct info_str *info, char *data, int len)
1422 {
1423 if (info->pos + len > info->length)
1424 len = info->length - info->pos;
1425
1426 if (info->pos + len < info->offset) {
1427 info->pos += len;
1428 return;
1429 }
1430 if (info->pos < info->offset) {
1431 data += (info->offset - info->pos);
1432 len -= (info->offset - info->pos);
1433 }
1434
1435 if (len > 0) {
1436 memcpy(info->buffer + info->pos, data, len);
1437 info->pos += len;
1438 }
1439 }
1440
1441 static int copy_info(struct info_str *info, char *fmt, ...)
1442 {
1443 va_list args;
1444 char buf[81];
1445 int len;
1446
1447 va_start(args, fmt);
1448 len = vsprintf(buf, fmt, args);
1449 va_end(args);
1450
1451 copy_mem_info(info, buf, len);
1452 return len;
1453 }
1454
1455 /*
1456 * Copy formatted information into the input buffer.
1457 */
1458 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1459 {
1460 struct info_str info;
1461
1462 info.buffer = ptr;
1463 info.length = len;
1464 info.offset = offset;
1465 info.pos = 0;
1466
1467 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1468 "revision id 0x%x\n",
1469 np->s.chip_name, np->device_id, np->revision_id);
1470 copy_info(&info, "At PCI address %s, "
1471 #ifdef __sparc__
1472 "IRQ %s\n",
1473 #else
1474 "IRQ %d\n",
1475 #endif
1476 pci_name(np->s.device),
1477 #ifdef __sparc__
1478 __irq_itoa(np->s.irq));
1479 #else
1480 (int) np->s.irq);
1481 #endif
1482 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1483 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1484 np->maxwide ? "Wide" : "Narrow",
1485 np->minsync_dt ? ", DT capable" : "");
1486
1487 copy_info(&info, "Max. started commands %d, "
1488 "max. commands per LUN %d\n",
1489 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1490
1491 return info.pos > info.offset? info.pos - info.offset : 0;
1492 }
1493 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1494
1495 /*
1496 * Entry point of the scsi proc fs of the driver.
1497 * - func = 0 means read (returns adapter infos)
1498 * - func = 1 means write (not yet merget from sym53c8xx)
1499 */
1500 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1501 char **start, off_t offset, int length, int func)
1502 {
1503 struct host_data *host_data;
1504 struct sym_hcb *np = NULL;
1505 int retv;
1506
1507 host_data = (struct host_data *) host->hostdata;
1508 np = host_data->ncb;
1509 if (!np)
1510 return -EINVAL;
1511
1512 if (func) {
1513 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1514 retv = sym_user_command(np, buffer, length);
1515 #else
1516 retv = -EINVAL;
1517 #endif
1518 } else {
1519 if (start)
1520 *start = buffer;
1521 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1522 retv = sym_host_info(np, buffer, offset, length);
1523 #else
1524 retv = -EINVAL;
1525 #endif
1526 }
1527
1528 return retv;
1529 }
1530 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1531
1532 /*
1533 * Free controller resources.
1534 */
1535 static void sym_free_resources(struct sym_hcb *np)
1536 {
1537 /*
1538 * Free O/S specific resources.
1539 */
1540 if (np->s.irq)
1541 free_irq(np->s.irq, np);
1542 #ifndef SYM_CONF_IOMAPPED
1543 if (np->s.mmio_va)
1544 iounmap(np->s.mmio_va);
1545 #endif
1546 if (np->s.ram_va)
1547 iounmap(np->s.ram_va);
1548 /*
1549 * Free O/S independent resources.
1550 */
1551 sym_hcb_free(np);
1552
1553 sym_mfree_dma(np, sizeof(*np), "HCB");
1554 }
1555
1556 /*
1557 * Ask/tell the system about DMA addressing.
1558 */
1559 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1560 {
1561 #if SYM_CONF_DMA_ADDRESSING_MODE == 0
1562 if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
1563 goto out_err32;
1564 #else
1565 #if SYM_CONF_DMA_ADDRESSING_MODE == 1
1566 #define PciDmaMask 0xffffffffffULL
1567 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1568 #define PciDmaMask 0xffffffffffffffffULL
1569 #endif
1570 if (np->features & FE_DAC) {
1571 if (!pci_set_dma_mask(np->s.device, PciDmaMask)) {
1572 np->use_dac = 1;
1573 printf_info("%s: using 64 bit DMA addressing\n",
1574 sym_name(np));
1575 } else {
1576 if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
1577 goto out_err32;
1578 }
1579 }
1580 #undef PciDmaMask
1581 #endif
1582 return 0;
1583
1584 out_err32:
1585 printf_warning("%s: 32 BIT DMA ADDRESSING NOT SUPPORTED\n",
1586 sym_name(np));
1587 return -1;
1588 }
1589
1590 /*
1591 * Host attach and initialisations.
1592 *
1593 * Allocate host data and ncb structure.
1594 * Remap MMIO region.
1595 * Do chip initialization.
1596 * If all is OK, install interrupt handling and
1597 * start the timer daemon.
1598 */
1599 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1600 int unit, struct sym_device *dev)
1601 {
1602 struct host_data *host_data;
1603 struct sym_hcb *np = NULL;
1604 struct Scsi_Host *instance = NULL;
1605 unsigned long flags;
1606 struct sym_fw *fw;
1607
1608 printk(KERN_INFO
1609 "sym%d: <%s> rev 0x%x at pci %s "
1610 #ifdef __sparc__
1611 "irq %s\n",
1612 #else
1613 "irq %d\n",
1614 #endif
1615 unit, dev->chip.name, dev->chip.revision_id,
1616 pci_name(dev->pdev),
1617 #ifdef __sparc__
1618 __irq_itoa(dev->s.irq));
1619 #else
1620 dev->s.irq);
1621 #endif
1622
1623 /*
1624 * Get the firmware for this chip.
1625 */
1626 fw = sym_find_firmware(&dev->chip);
1627 if (!fw)
1628 goto attach_failed;
1629
1630 /*
1631 * Allocate host_data structure
1632 */
1633 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1634 if (!instance)
1635 goto attach_failed;
1636 host_data = (struct host_data *) instance->hostdata;
1637
1638 /*
1639 * Allocate immediately the host control block,
1640 * since we are only expecting to succeed. :)
1641 * We keep track in the HCB of all the resources that
1642 * are to be released on error.
1643 */
1644 np = __sym_calloc_dma(dev->pdev, sizeof(*np), "HCB");
1645 if (!np)
1646 goto attach_failed;
1647 np->s.device = dev->pdev;
1648 np->bus_dmat = dev->pdev; /* Result in 1 DMA pool per HBA */
1649 host_data->ncb = np;
1650 np->s.host = instance;
1651
1652 pci_set_drvdata(dev->pdev, np);
1653
1654 /*
1655 * Copy some useful infos to the HCB.
1656 */
1657 np->hcb_ba = vtobus(np);
1658 np->verbose = sym_driver_setup.verbose;
1659 np->s.device = dev->pdev;
1660 np->s.unit = unit;
1661 np->device_id = dev->chip.device_id;
1662 np->revision_id = dev->chip.revision_id;
1663 np->features = dev->chip.features;
1664 np->clock_divn = dev->chip.nr_divisor;
1665 np->maxoffs = dev->chip.offset_max;
1666 np->maxburst = dev->chip.burst_max;
1667 np->myaddr = dev->host_id;
1668
1669 /*
1670 * Edit its name.
1671 */
1672 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1673 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1674
1675 /*
1676 * Ask/tell the system about DMA addressing.
1677 */
1678 if (sym_setup_bus_dma_mask(np))
1679 goto attach_failed;
1680
1681 /*
1682 * Try to map the controller chip to
1683 * virtual and physical memory.
1684 */
1685 np->mmio_ba = (u32)dev->s.base;
1686 np->s.io_ws = (np->features & FE_IO256)? 256 : 128;
1687
1688 #ifndef SYM_CONF_IOMAPPED
1689 np->s.mmio_va = ioremap(dev->s.base_c, np->s.io_ws);
1690 if (!np->s.mmio_va) {
1691 printf_err("%s: can't map PCI MMIO region\n", sym_name(np));
1692 goto attach_failed;
1693 } else if (sym_verbose > 1)
1694 printf_info("%s: using memory mapped IO\n", sym_name(np));
1695 #endif /* !defined SYM_CONF_IOMAPPED */
1696
1697 np->s.io_port = dev->s.io_port;
1698
1699 /*
1700 * Map on-chip RAM if present and supported.
1701 */
1702 if (!(np->features & FE_RAM))
1703 dev->s.base_2 = 0;
1704 if (dev->s.base_2) {
1705 np->ram_ba = (u32)dev->s.base_2;
1706 if (np->features & FE_RAM8K)
1707 np->ram_ws = 8192;
1708 else
1709 np->ram_ws = 4096;
1710 np->s.ram_va = ioremap(dev->s.base_2_c, np->ram_ws);
1711 if (!np->s.ram_va) {
1712 printf_err("%s: can't map PCI MEMORY region\n",
1713 sym_name(np));
1714 goto attach_failed;
1715 }
1716 }
1717
1718 /*
1719 * Perform O/S independent stuff.
1720 */
1721 if (sym_hcb_attach(np, fw, dev->nvram))
1722 goto attach_failed;
1723
1724
1725 /*
1726 * Install the interrupt handler.
1727 * If we synchonize the C code with SCRIPTS on interrupt,
1728 * we donnot want to share the INTR line at all.
1729 */
1730 if (request_irq(dev->s.irq, sym53c8xx_intr, SA_SHIRQ,
1731 NAME53C8XX, np)) {
1732 printf_err("%s: request irq %d failure\n",
1733 sym_name(np), dev->s.irq);
1734 goto attach_failed;
1735 }
1736 np->s.irq = dev->s.irq;
1737
1738 /*
1739 * After SCSI devices have been opened, we cannot
1740 * reset the bus safely, so we do it here.
1741 */
1742 spin_lock_irqsave(instance->host_lock, flags);
1743 if (sym_reset_scsi_bus(np, 0))
1744 goto reset_failed;
1745
1746 /*
1747 * Initialize some queue headers.
1748 */
1749 sym_que_init(&np->s.wait_cmdq);
1750 sym_que_init(&np->s.busy_cmdq);
1751
1752 /*
1753 * Start the SCRIPTS.
1754 */
1755 sym_start_up (np, 1);
1756
1757 /*
1758 * Start the timer daemon
1759 */
1760 init_timer(&np->s.timer);
1761 np->s.timer.data = (unsigned long) np;
1762 np->s.timer.function = sym53c8xx_timer;
1763 np->s.lasttime=0;
1764 sym_timer (np);
1765
1766 /*
1767 * Fill Linux host instance structure
1768 * and return success.
1769 */
1770 instance->max_channel = 0;
1771 instance->this_id = np->myaddr;
1772 instance->max_id = np->maxwide ? 16 : 8;
1773 instance->max_lun = SYM_CONF_MAX_LUN;
1774 #ifndef SYM_CONF_IOMAPPED
1775 instance->base = (unsigned long) np->s.mmio_va;
1776 #endif
1777 instance->irq = np->s.irq;
1778 instance->unique_id = np->s.io_port;
1779 instance->io_port = np->s.io_port;
1780 instance->n_io_port = np->s.io_ws;
1781 instance->dma_channel = 0;
1782 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
1783 instance->can_queue = (SYM_CONF_MAX_START-2);
1784 instance->sg_tablesize = SYM_CONF_MAX_SG;
1785 instance->max_cmd_len = 16;
1786 BUG_ON(sym2_transport_template == NULL);
1787 instance->transportt = sym2_transport_template;
1788
1789 spin_unlock_irqrestore(instance->host_lock, flags);
1790
1791 return instance;
1792
1793 reset_failed:
1794 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1795 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1796 spin_unlock_irqrestore(instance->host_lock, flags);
1797 attach_failed:
1798 if (!instance)
1799 return NULL;
1800 printf_info("%s: giving up ...\n", sym_name(np));
1801 if (np)
1802 sym_free_resources(np);
1803 scsi_host_put(instance);
1804
1805 return NULL;
1806 }
1807
1808
1809 /*
1810 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1811 */
1812 #if SYM_CONF_NVRAM_SUPPORT
1813 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1814 {
1815 devp->nvram = nvp;
1816 devp->device_id = devp->chip.device_id;
1817 nvp->type = 0;
1818
1819 /*
1820 * Get access to chip IO registers
1821 */
1822 #ifndef SYM_CONF_IOMAPPED
1823 devp->s.mmio_va = ioremap(devp->s.base_c, 128);
1824 if (!devp->s.mmio_va)
1825 return;
1826 #endif
1827
1828 sym_read_nvram(devp, nvp);
1829
1830 /*
1831 * Release access to chip IO registers
1832 */
1833 #ifndef SYM_CONF_IOMAPPED
1834 iounmap(devp->s.mmio_va);
1835 #endif
1836 }
1837 #else
1838 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1839 {
1840 }
1841 #endif /* SYM_CONF_NVRAM_SUPPORT */
1842
1843 /*
1844 * Driver setup from the boot command line
1845 */
1846 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
1847
1848 static struct sym_driver_setup
1849 sym_driver_safe_setup __initdata = SYM_LINUX_DRIVER_SAFE_SETUP;
1850 #ifdef MODULE
1851 char *sym53c8xx; /* command line passed by insmod */
1852 MODULE_PARM(sym53c8xx, "s");
1853 #endif
1854
1855 #define OPT_MAX_TAG 1
1856 #define OPT_BURST_ORDER 2
1857 #define OPT_SCSI_LED 3
1858 #define OPT_SCSI_DIFF 4
1859 #define OPT_IRQ_MODE 5
1860 #define OPT_SCSI_BUS_CHECK 6
1861 #define OPT_HOST_ID 7
1862 #define OPT_REVERSE_PROBE 8
1863 #define OPT_VERBOSE 9
1864 #define OPT_DEBUG 10
1865 #define OPT_SETTLE_DELAY 11
1866 #define OPT_USE_NVRAM 12
1867 #define OPT_EXCLUDE 13
1868 #define OPT_SAFE_SETUP 14
1869
1870 static char setup_token[] __initdata =
1871 "tags:" "burst:"
1872 "led:" "diff:"
1873 "irqm:" "buschk:"
1874 "hostid:" "revprob:"
1875 "verb:" "debug:"
1876 "settle:" "nvram:"
1877 "excl:" "safe:"
1878 ;
1879
1880 #ifdef MODULE
1881 #define ARG_SEP ' '
1882 #else
1883 #define ARG_SEP ','
1884 #endif
1885
1886 static int __init get_setup_token(char *p)
1887 {
1888 char *cur = setup_token;
1889 char *pc;
1890 int i = 0;
1891
1892 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
1893 ++pc;
1894 ++i;
1895 if (!strncmp(p, cur, pc - cur))
1896 return i;
1897 cur = pc;
1898 }
1899 return 0;
1900 }
1901 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
1902
1903 int __init sym53c8xx_setup(char *str)
1904 {
1905 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
1906 char *cur = str;
1907 char *pc, *pv;
1908 unsigned long val;
1909 unsigned int i, c;
1910 int xi = 0;
1911
1912 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
1913 char *pe;
1914
1915 val = 0;
1916 pv = pc;
1917 c = *++pv;
1918
1919 if (c == 'n')
1920 val = 0;
1921 else if (c == 'y')
1922 val = 1;
1923 else
1924 val = (int) simple_strtoul(pv, &pe, 0);
1925
1926 switch (get_setup_token(cur)) {
1927 case OPT_MAX_TAG:
1928 sym_driver_setup.max_tag = val;
1929 if (!(pe && *pe == '/'))
1930 break;
1931 i = 0;
1932 while (*pe && *pe != ARG_SEP &&
1933 i < sizeof(sym_driver_setup.tag_ctrl)-1) {
1934 sym_driver_setup.tag_ctrl[i++] = *pe++;
1935 }
1936 sym_driver_setup.tag_ctrl[i] = '\0';
1937 break;
1938 case OPT_SAFE_SETUP:
1939 memcpy(&sym_driver_setup, &sym_driver_safe_setup,
1940 sizeof(sym_driver_setup));
1941 break;
1942 case OPT_EXCLUDE:
1943 if (xi < 8)
1944 sym_driver_setup.excludes[xi++] = val;
1945 break;
1946
1947 #define __SIMPLE_OPTION(NAME, name) \
1948 case OPT_ ## NAME : \
1949 sym_driver_setup.name = val;\
1950 break;
1951
1952 __SIMPLE_OPTION(BURST_ORDER, burst_order)
1953 __SIMPLE_OPTION(SCSI_LED, scsi_led)
1954 __SIMPLE_OPTION(SCSI_DIFF, scsi_diff)
1955 __SIMPLE_OPTION(IRQ_MODE, irq_mode)
1956 __SIMPLE_OPTION(SCSI_BUS_CHECK, scsi_bus_check)
1957 __SIMPLE_OPTION(HOST_ID, host_id)
1958 __SIMPLE_OPTION(REVERSE_PROBE, reverse_probe)
1959 __SIMPLE_OPTION(VERBOSE, verbose)
1960 __SIMPLE_OPTION(DEBUG, debug)
1961 __SIMPLE_OPTION(SETTLE_DELAY, settle_delay)
1962 __SIMPLE_OPTION(USE_NVRAM, use_nvram)
1963
1964 #undef __SIMPLE_OPTION
1965
1966 default:
1967 printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
1968 break;
1969 }
1970
1971 if ((cur = strchr(cur, ARG_SEP)) != NULL)
1972 ++cur;
1973 }
1974 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
1975 return 1;
1976 }
1977
1978 #ifndef MODULE
1979 __setup("sym53c8xx=", sym53c8xx_setup);
1980 #endif
1981
1982 /*
1983 * Read and check the PCI configuration for any detected NCR
1984 * boards and save data for attaching after all boards have
1985 * been detected.
1986 */
1987 static int __devinit
1988 sym53c8xx_pci_init(struct pci_dev *pdev, struct sym_device *device)
1989 {
1990 struct sym_pci_chip *chip;
1991 u_long base, base_2;
1992 u_long base_c, base_2_c, io_port;
1993 int i;
1994 u_short device_id, status_reg;
1995 u_char revision;
1996
1997 /* Choose some short name for this device */
1998 sprintf(device->s.inst_name, "sym.%d.%d.%d", pdev->bus->number,
1999 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2000
2001 device_id = pdev->device;
2002
2003 io_port = pdev->resource[0].start;
2004
2005 base_c = pdev->resource[1].start;
2006 i = pci_get_base_address(pdev, 1, &base);
2007
2008 base_2_c = pdev->resource[i].start;
2009 pci_get_base_address(pdev, i, &base_2);
2010
2011 base &= PCI_BASE_ADDRESS_MEM_MASK;
2012 base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
2013
2014 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
2015
2016 /*
2017 * If user excluded this chip, do not initialize it.
2018 */
2019 if (io_port) {
2020 for (i = 0 ; i < 8 ; i++) {
2021 if (sym_driver_setup.excludes[i] == io_port)
2022 return -1;
2023 }
2024 }
2025
2026 /*
2027 * Check if the chip is supported.
2028 */
2029 chip = sym_lookup_pci_chip_table(device_id, revision);
2030 if (!chip) {
2031 printf_info("%s: device not supported\n", sym_name(device));
2032 return -1;
2033 }
2034
2035 /*
2036 * Check if the chip has been assigned resources we need.
2037 * XXX: can this still happen with Linux 2.6's PCI layer?
2038 */
2039 #ifdef SYM_CONF_IOMAPPED
2040 if (!io_port) {
2041 printf_info("%s: IO base address disabled.\n",
2042 sym_name(device));
2043 return -1;
2044 }
2045 #else
2046 if (!base) {
2047 printf_info("%s: MMIO base address disabled.\n",
2048 sym_name(device));
2049 return -1;
2050 }
2051 #endif
2052
2053 /*
2054 * Ignore Symbios chips controlled by various RAID controllers.
2055 * These controllers set value 0x52414944 at RAM end - 16.
2056 */
2057 #if defined(__i386__)
2058 if (base_2_c) {
2059 unsigned int ram_size, ram_val;
2060 void *ram_ptr;
2061
2062 if (chip->features & FE_RAM8K)
2063 ram_size = 8192;
2064 else
2065 ram_size = 4096;
2066
2067 ram_ptr = ioremap(base_2_c, ram_size);
2068 if (ram_ptr) {
2069 ram_val = readl_raw(ram_ptr + ram_size - 16);
2070 iounmap(ram_ptr);
2071 if (ram_val == 0x52414944) {
2072 printf_info("%s: not initializing, "
2073 "driven by RAID controller.\n",
2074 sym_name(device));
2075 return -1;
2076 }
2077 }
2078 }
2079 #endif /* i386 and PCI MEMORY accessible */
2080
2081 /*
2082 * Copy the chip description to our device structure,
2083 * so we can make it match the actual device and options.
2084 */
2085 memcpy(&device->chip, chip, sizeof(device->chip));
2086 device->chip.revision_id = revision;
2087
2088 /*
2089 * Some features are required to be enabled in order to
2090 * work around some chip problems. :) ;)
2091 * (ITEM 12 of a DEL about the 896 I haven't yet).
2092 * We must ensure the chip will use WRITE AND INVALIDATE.
2093 * The revision number limit is for now arbitrary.
2094 */
2095 if (device_id == PCI_DEVICE_ID_NCR_53C896 && revision < 0x4) {
2096 chip->features |= (FE_WRIE | FE_CLSE);
2097 }
2098
2099 /* If the chip can do Memory Write Invalidate, enable it */
2100 if (chip->features & FE_WRIE) {
2101 if (pci_set_mwi(pdev))
2102 return -1;
2103 }
2104
2105 /*
2106 * Work around for errant bit in 895A. The 66Mhz
2107 * capable bit is set erroneously. Clear this bit.
2108 * (Item 1 DEL 533)
2109 *
2110 * Make sure Config space and Features agree.
2111 *
2112 * Recall: writes are not normal to status register -
2113 * write a 1 to clear and a 0 to leave unchanged.
2114 * Can only reset bits.
2115 */
2116 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
2117 if (chip->features & FE_66MHZ) {
2118 if (!(status_reg & PCI_STATUS_66MHZ))
2119 chip->features &= ~FE_66MHZ;
2120 } else {
2121 if (status_reg & PCI_STATUS_66MHZ) {
2122 status_reg = PCI_STATUS_66MHZ;
2123 pci_write_config_word(pdev, PCI_STATUS, status_reg);
2124 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
2125 }
2126 }
2127
2128 /*
2129 * Initialise device structure with items required by sym_attach.
2130 */
2131 device->pdev = pdev;
2132 device->s.base = base;
2133 device->s.base_2 = base_2;
2134 device->s.base_c = base_c;
2135 device->s.base_2_c = base_2_c;
2136 device->s.io_port = io_port;
2137 device->s.irq = pdev->irq;
2138
2139 return 0;
2140 }
2141
2142 /*
2143 * The NCR PQS and PDS cards are constructed as a DEC bridge
2144 * behind which sits a proprietary NCR memory controller and
2145 * either four or two 53c875s as separate devices. We can tell
2146 * if an 875 is part of a PQS/PDS or not since if it is, it will
2147 * be on the same bus as the memory controller. In its usual
2148 * mode of operation, the 875s are slaved to the memory
2149 * controller for all transfers. To operate with the Linux
2150 * driver, the memory controller is disabled and the 875s
2151 * freed to function independently. The only wrinkle is that
2152 * the preset SCSI ID (which may be zero) must be read in from
2153 * a special configuration space register of the 875.
2154 */
2155 void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
2156 {
2157 int slot;
2158
2159 for (slot = 0; slot < 256; slot++) {
2160 u8 tmp;
2161 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
2162
2163 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
2164 pci_dev_put(memc);
2165 continue;
2166 }
2167
2168 /*
2169 * We set these bits in the memory controller once per 875.
2170 * This isn't a problem in practice.
2171 */
2172
2173 /* bit 1: allow individual 875 configuration */
2174 pci_read_config_byte(memc, 0x44, &tmp);
2175 tmp |= 0x2;
2176 pci_write_config_byte(memc, 0x44, tmp);
2177
2178 /* bit 2: drive individual 875 interrupts to the bus */
2179 pci_read_config_byte(memc, 0x45, &tmp);
2180 tmp |= 0x4;
2181 pci_write_config_byte(memc, 0x45, tmp);
2182
2183 pci_read_config_byte(pdev, 0x84, &tmp);
2184 sym_dev->host_id = tmp;
2185
2186 pci_dev_put(memc);
2187
2188 break;
2189 }
2190 }
2191
2192 /*
2193 * Called before unloading the module.
2194 * Detach the host.
2195 * We have to free resources and halt the NCR chip.
2196 */
2197 static int sym_detach(struct sym_hcb *np)
2198 {
2199 printk("%s: detaching ...\n", sym_name(np));
2200
2201 del_timer_sync(&np->s.timer);
2202
2203 /*
2204 * Reset NCR chip.
2205 * We should use sym_soft_reset(), but we don't want to do
2206 * so, since we may not be safe if interrupts occur.
2207 */
2208 printk("%s: resetting chip\n", sym_name(np));
2209 OUTB (nc_istat, SRST);
2210 UDELAY (10);
2211 OUTB (nc_istat, 0);
2212
2213 sym_free_resources(np);
2214
2215 return 1;
2216 }
2217
2218 MODULE_LICENSE("Dual BSD/GPL");
2219 MODULE_VERSION(SYM_VERSION);
2220
2221 /*
2222 * Driver host template.
2223 */
2224 static struct scsi_host_template sym2_template = {
2225 .module = THIS_MODULE,
2226 .name = "sym53c8xx",
2227 .info = sym53c8xx_info,
2228 .queuecommand = sym53c8xx_queue_command,
2229 .slave_configure = sym53c8xx_slave_configure,
2230 .eh_abort_handler = sym53c8xx_eh_abort_handler,
2231 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
2232 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
2233 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
2234 .this_id = 7,
2235 .use_clustering = DISABLE_CLUSTERING,
2236 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
2237 .proc_info = sym53c8xx_proc_info,
2238 .proc_name = NAME53C8XX,
2239 #endif
2240 };
2241
2242 static int attach_count;
2243
2244 static int __devinit sym2_probe(struct pci_dev *pdev,
2245 const struct pci_device_id *ent)
2246 {
2247 struct sym_device sym_dev;
2248 struct sym_nvram nvram;
2249 struct Scsi_Host *instance;
2250
2251 memset(&sym_dev, 0, sizeof(sym_dev));
2252 memset(&nvram, 0, sizeof(nvram));
2253
2254 if (pci_enable_device(pdev))
2255 return -ENODEV;
2256
2257 pci_set_master(pdev);
2258
2259 if (pci_request_regions(pdev, NAME53C8XX))
2260 goto disable;
2261
2262 sym_dev.host_id = SYM_SETUP_HOST_ID;
2263 if (sym53c8xx_pci_init(pdev, &sym_dev))
2264 goto free;
2265
2266 sym_config_pqs(pdev, &sym_dev);
2267
2268 sym_get_nvram(&sym_dev, &nvram);
2269
2270 instance = sym_attach(&sym2_template, attach_count, &sym_dev);
2271 if (!instance)
2272 goto free;
2273
2274 if (scsi_add_host(instance, &pdev->dev))
2275 goto detach;
2276 scsi_scan_host(instance);
2277
2278 attach_count++;
2279
2280 return 0;
2281
2282 detach:
2283 sym_detach(pci_get_drvdata(pdev));
2284 free:
2285 pci_release_regions(pdev);
2286 disable:
2287 pci_disable_device(pdev);
2288 return -ENODEV;
2289 }
2290
2291 static void __devexit sym2_remove(struct pci_dev *pdev)
2292 {
2293 struct sym_hcb *np = pci_get_drvdata(pdev);
2294 struct Scsi_Host *host = np->s.host;
2295
2296 scsi_remove_host(host);
2297 scsi_host_put(host);
2298
2299 sym_detach(np);
2300
2301 pci_release_regions(pdev);
2302 pci_disable_device(pdev);
2303
2304 attach_count--;
2305 }
2306
2307 static void sym2_get_offset(struct scsi_device *sdev)
2308 {
2309 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2310 struct sym_tcb *tp = &np->target[sdev->id];
2311
2312 spi_offset(sdev) = tp->tinfo.curr.offset;
2313 }
2314
2315 static void sym2_set_offset(struct scsi_device *sdev, int offset)
2316 {
2317 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2318 struct sym_tcb *tp = &np->target[sdev->id];
2319
2320 tp->tinfo.goal.offset = offset;
2321 }
2322
2323
2324 static void sym2_get_period(struct scsi_device *sdev)
2325 {
2326 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2327 struct sym_tcb *tp = &np->target[sdev->id];
2328
2329 spi_period(sdev) = tp->tinfo.curr.period;
2330 }
2331
2332 static void sym2_set_period(struct scsi_device *sdev, int period)
2333 {
2334 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2335 struct sym_tcb *tp = &np->target[sdev->id];
2336
2337 /* have to have DT for these transfers */
2338 if (period <= np->minsync)
2339 tp->tinfo.goal.options |= PPR_OPT_DT;
2340
2341 tp->tinfo.goal.period = period;
2342 }
2343
2344 static void sym2_get_width(struct scsi_device *sdev)
2345 {
2346 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2347 struct sym_tcb *tp = &np->target[sdev->id];
2348
2349 spi_width(sdev) = tp->tinfo.curr.width ? 1 : 0;
2350 }
2351
2352 static void sym2_set_width(struct scsi_device *sdev, int width)
2353 {
2354 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2355 struct sym_tcb *tp = &np->target[sdev->id];
2356
2357 /* It is illegal to have DT set on narrow transfers */
2358 if (width == 0)
2359 tp->tinfo.goal.options &= ~PPR_OPT_DT;
2360
2361 tp->tinfo.goal.width = width;
2362 }
2363
2364 static void sym2_get_dt(struct scsi_device *sdev)
2365 {
2366 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2367 struct sym_tcb *tp = &np->target[sdev->id];
2368
2369 spi_dt(sdev) = (tp->tinfo.curr.options & PPR_OPT_DT) ? 1 : 0;
2370 }
2371
2372 static void sym2_set_dt(struct scsi_device *sdev, int dt)
2373 {
2374 struct sym_hcb *np = ((struct host_data *)sdev->host->hostdata)->ncb;
2375 struct sym_tcb *tp = &np->target[sdev->id];
2376
2377 if (dt)
2378 tp->tinfo.goal.options |= PPR_OPT_DT;
2379 else
2380 tp->tinfo.goal.options &= ~PPR_OPT_DT;
2381 }
2382
2383
2384 static struct spi_function_template sym2_transport_functions = {
2385 .set_offset = sym2_set_offset,
2386 .get_offset = sym2_get_offset,
2387 .show_offset = 1,
2388 .set_period = sym2_set_period,
2389 .get_period = sym2_get_period,
2390 .show_period = 1,
2391 .set_width = sym2_set_width,
2392 .get_width = sym2_get_width,
2393 .show_width = 1,
2394 .get_dt = sym2_get_dt,
2395 .set_dt = sym2_set_dt,
2396 .show_dt = 1,
2397 };
2398
2399 static struct pci_device_id sym2_id_table[] __devinitdata = {
2400 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2401 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2402 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2403 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2404 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2405 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2406 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2407 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2408 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2409 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2410 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2411 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2412 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2413 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2414 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2415 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2416 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2417 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2418 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2419 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2420 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2421 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2422 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2423 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2424 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2425 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2426 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2427 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2428 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2429 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2430 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2431 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2432 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2433 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2434 { 0, }
2435 };
2436
2437 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2438
2439 static struct pci_driver sym2_driver = {
2440 .name = NAME53C8XX,
2441 .id_table = sym2_id_table,
2442 .probe = sym2_probe,
2443 .remove = __devexit_p(sym2_remove),
2444 };
2445
2446 static int __init sym2_init(void)
2447 {
2448 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2449 if (!sym2_transport_template)
2450 return -ENODEV;
2451
2452 pci_register_driver(&sym2_driver);
2453 return 0;
2454 }
2455
2456 static void __exit sym2_exit(void)
2457 {
2458 pci_unregister_driver(&sym2_driver);
2459 spi_release_transport(sym2_transport_template);
2460 }
2461
2462 module_init(sym2_init);
2463 module_exit(sym2_exit);
MOXA 2.6.9 from sdlinux-moxaart.tgz