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Merge with Linux 2.5.74.
[linux-2.6/linux-mips.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
blobbe1548c00e3deac926e3b02476ae8e65eb33e932
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/module.h>
55 #include "sym_glue.h"
56
57 #define NAME53C "sym53c"
58 #define NAME53C8XX "sym53c8xx"
59
60 /*
61 * Simple Wrapper to kernel PCI bus interface.
62 */
63
64 typedef struct pci_dev *pcidev_t;
65 #define PCIDEV_NULL (0)
66 #define PciBusNumber(d) (d)->bus->number
67 #define PciDeviceFn(d) (d)->devfn
68 #define PciVendorId(d) (d)->vendor
69 #define PciDeviceId(d) (d)->device
70 #define PciIrqLine(d) (d)->irq
71
72 static u_long __init
73 pci_get_base_cookie(struct pci_dev *pdev, int index)
74 {
75 u_long base;
76
77 #if LINUX_VERSION_CODE > LinuxVersionCode(2,3,12)
78 base = pdev->resource[index].start;
79 #else
80 base = pdev->base_address[index];
81 #if BITS_PER_LONG > 32
82 if ((base & 0x7) == 0x4)
83 base |= (((u_long)pdev->base_address[++index]) << 32);
84 #endif
85 #endif
86 return (base & ~0x7ul);
87 }
88
89 static int __init
90 pci_get_base_address(struct pci_dev *pdev, int index, u_long *base)
91 {
92 u32 tmp;
93 #define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
94
95 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
96 *base = tmp;
97 ++index;
98 if ((tmp & 0x7) == 0x4) {
99 #if BITS_PER_LONG > 32
100 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
101 *base |= (((u_long)tmp) << 32);
102 #endif
103 ++index;
104 }
105 return index;
106 #undef PCI_BAR_OFFSET
107 }
108
109 #if LINUX_VERSION_CODE < LinuxVersionCode(2,4,0)
110 #define pci_enable_device(pdev) (0)
111 #endif
112
113 #if LINUX_VERSION_CODE < LinuxVersionCode(2,4,4)
114 #define scsi_set_pci_device(inst, pdev) do { ;} while (0)
115 #endif
116
117 /*
118 * Insert a delay in micro-seconds and milli-seconds.
119 */
120 void sym_udelay(int us) { udelay(us); }
121 void sym_mdelay(int ms) { mdelay(ms); }
122
123 /*
124 * SMP threading.
125 *
126 * The whole SCSI sub-system under Linux is basically single-threaded.
127 * Everything, including low-level driver interrupt routine, happens
128 * with the `io_request_lock' held.
129 * The sym53c8xx-1.x drivers series ran their interrupt code using a
130 * spin mutex per controller. This added complexity without improving
131 * scalability significantly. the sym-2 driver still use a spinlock
132 * per controller for safety, but basically runs with the damned
133 * io_request_lock held.
134 */
135
136 spinlock_t sym53c8xx_lock = SPIN_LOCK_UNLOCKED;
137
138 #define SYM_LOCK_DRIVER(flags) spin_lock_irqsave(&sym53c8xx_lock, flags)
139 #define SYM_UNLOCK_DRIVER(flags) spin_unlock_irqrestore(&sym53c8xx_lock,flags)
140
141 #define SYM_INIT_LOCK_HCB(np) spin_lock_init((np)->s.host->host_lock);
142 #define SYM_LOCK_HCB(np, flags) \
143 spin_lock_irqsave((np)->s.host->host_lock, flags)
144 #define SYM_UNLOCK_HCB(np, flags) \
145 spin_unlock_irqrestore((np)->s.host->host_lock, flags)
146
147 /*
148 * These simple macros limit expression involving
149 * kernel time values (jiffies) to some that have
150 * chance not to be too much incorrect. :-)
151 */
152 #define ktime_get(o) (jiffies + (u_long) o)
153 #define ktime_exp(b) ((long)(jiffies) - (long)(b) >= 0)
154 #define ktime_dif(a, b) ((long)(a) - (long)(b))
155 #define ktime_add(a, o) ((a) + (u_long)(o))
156 #define ktime_sub(a, o) ((a) - (u_long)(o))
157
158 /*
159 * Wrappers to the generic memory allocator.
160 */
161 void *sym_calloc(int size, char *name)
162 {
163 u_long flags;
164 void *m;
165 SYM_LOCK_DRIVER(flags);
166 m = sym_calloc_unlocked(size, name);
167 SYM_UNLOCK_DRIVER(flags);
168 return m;
169 }
170
171 void sym_mfree(void *m, int size, char *name)
172 {
173 u_long flags;
174 SYM_LOCK_DRIVER(flags);
175 sym_mfree_unlocked(m, size, name);
176 SYM_UNLOCK_DRIVER(flags);
177 }
178
179 #ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
180
181 void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name)
182 {
183 u_long flags;
184 void *m;
185 SYM_LOCK_DRIVER(flags);
186 m = __sym_calloc_dma_unlocked(dev_dmat, size, name);
187 SYM_UNLOCK_DRIVER(flags);
188 return m;
189 }
190
191 void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name)
192 {
193 u_long flags;
194 SYM_LOCK_DRIVER(flags);
195 __sym_mfree_dma_unlocked(dev_dmat, m, size, name);
196 SYM_UNLOCK_DRIVER(flags);
197 }
198
199 m_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m)
200 {
201 u_long flags;
202 m_addr_t b;
203 SYM_LOCK_DRIVER(flags);
204 b = __vtobus_unlocked(dev_dmat, m);
205 SYM_UNLOCK_DRIVER(flags);
206 return b;
207 }
208
209 #endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
210
211
212 /*
213 * Map/unmap a PCI memory window.
214 */
215 #ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
216 static u_long __init pci_map_mem(u_long base, u_long size)
217 {
218 u_long page_base = ((u_long) base) & PAGE_MASK;
219 u_long page_offs = ((u_long) base) - page_base;
220 u_long page_remapped = (u_long) ioremap(page_base, page_offs+size);
221
222 return page_remapped? (page_remapped + page_offs) : 0UL;
223 }
224
225 static void __init pci_unmap_mem(u_long vaddr, u_long size)
226 {
227 if (vaddr)
228 iounmap((void *) (vaddr & PAGE_MASK));
229 }
230 #endif
231
232 /*
233 * Used to retrieve the host structure when the
234 * driver is called from the proc FS.
235 */
236 static struct Scsi_Host *first_host = NULL;
237
238 /*
239 * /proc directory entry and proc_info.
240 */
241 #if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
242 static struct proc_dir_entry proc_scsi_sym53c8xx = {
243 PROC_SCSI_SYM53C8XX, 9, NAME53C8XX,
244 S_IFDIR | S_IRUGO | S_IXUGO, 2
245 };
246 #endif
247
248 /*
249 * Transfer direction
250 *
251 * Until some linux kernel version near 2.3.40, low-level scsi
252 * drivers were not told about data transfer direction.
253 */
254 #if LINUX_VERSION_CODE > LinuxVersionCode(2, 3, 40)
255
256 #define scsi_data_direction(cmd) (cmd->sc_data_direction)
257
258 #else
259
260 static __inline__ int scsi_data_direction(Scsi_Cmnd *cmd)
261 {
262 int direction;
263
264 switch((int) cmd->cmnd[0]) {
265 case 0x08: /* READ(6) 08 */
266 case 0x28: /* READ(10) 28 */
267 case 0xA8: /* READ(12) A8 */
268 direction = SCSI_DATA_READ;
269 break;
270 case 0x0A: /* WRITE(6) 0A */
271 case 0x2A: /* WRITE(10) 2A */
272 case 0xAA: /* WRITE(12) AA */
273 direction = SCSI_DATA_WRITE;
274 break;
275 default:
276 direction = SCSI_DATA_UNKNOWN;
277 break;
278 }
279
280 return direction;
281 }
282
283 #endif
284
285 /*
286 * Driver host data structure.
287 */
288 struct host_data {
289 hcb_p ncb;
290 };
291
292 /*
293 * Some type that fit DMA addresses as seen from BUS.
294 */
295 #ifndef SYM_LINUX_DYNAMIC_DMA_MAPPING
296 typedef u_long bus_addr_t;
297 #else
298 typedef dma_addr_t bus_addr_t;
299 #endif
300
301 /*
302 * Used by the eh thread to wait for command completion.
303 * It is allocated on the eh thread stack.
304 */
305 struct sym_eh_wait {
306 struct semaphore sem;
307 struct timer_list timer;
308 void (*old_done)(Scsi_Cmnd *);
309 int to_do;
310 int timed_out;
311 };
312
313 /*
314 * Driver private area in the SCSI command structure.
315 */
316 struct sym_ucmd { /* Override the SCSI pointer structure */
317 SYM_QUEHEAD link_cmdq; /* Must stay at offset ZERO */
318 #ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
319 bus_addr_t data_mapping;
320 u_char data_mapped;
321 #endif
322 struct sym_eh_wait *eh_wait;
323 };
324
325 typedef struct sym_ucmd *ucmd_p;
326
327 #define SYM_UCMD_PTR(cmd) ((ucmd_p)(&(cmd)->SCp))
328 #define SYM_SCMD_PTR(ucmd) sym_que_entry(ucmd, Scsi_Cmnd, SCp)
329 #define SYM_SOFTC_PTR(cmd) (((struct host_data *)cmd->device->host->hostdata)->ncb)
330
331 /*
332 * Deal with DMA mapping/unmapping.
333 */
334
335 #ifndef SYM_LINUX_DYNAMIC_DMA_MAPPING
336
337 /* Linux versions prior to pci bus iommu kernel interface */
338
339 #define __unmap_scsi_data(pdev, cmd) do {; } while (0)
340 #define __map_scsi_single_data(pdev, cmd) (__vtobus(pdev,(cmd)->request_buffer))
341 #define __map_scsi_sg_data(pdev, cmd) ((cmd)->use_sg)
342 #define __sync_scsi_data(pdev, cmd) do {; } while (0)
343
344 #define bus_sg_dma_address(sc) vtobus((sc)->address)
345 #define bus_sg_dma_len(sc) ((sc)->length)
346
347 #else /* Linux version with pci bus iommu kernel interface */
348
349 #define bus_unmap_sg(pdev, sgptr, sgcnt, dir) \
350 pci_unmap_sg(pdev, sgptr, sgcnt, dir)
351
352 #define bus_unmap_single(pdev, mapping, bufptr, dir) \
353 pci_unmap_single(pdev, mapping, bufptr, dir)
354
355 #define bus_map_single(pdev, bufptr, bufsiz, dir) \
356 pci_map_single(pdev, bufptr, bufsiz, dir)
357
358 #define bus_map_sg(pdev, sgptr, sgcnt, dir) \
359 pci_map_sg(pdev, sgptr, sgcnt, dir)
360
361 #define bus_dma_sync_sg(pdev, sgptr, sgcnt, dir) \
362 pci_dma_sync_sg(pdev, sgptr, sgcnt, dir)
363
364 #define bus_dma_sync_single(pdev, mapping, bufsiz, dir) \
365 pci_dma_sync_single(pdev, mapping, bufsiz, dir)
366
367 #define bus_sg_dma_address(sc) sg_dma_address(sc)
368 #define bus_sg_dma_len(sc) sg_dma_len(sc)
369
370 static void __unmap_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
371 {
372 int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
373
374 switch(SYM_UCMD_PTR(cmd)->data_mapped) {
375 case 2:
376 bus_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
377 break;
378 case 1:
379 bus_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
380 cmd->request_bufflen, dma_dir);
381 break;
382 }
383 SYM_UCMD_PTR(cmd)->data_mapped = 0;
384 }
385
386 static bus_addr_t __map_scsi_single_data(pcidev_t pdev, Scsi_Cmnd *cmd)
387 {
388 bus_addr_t mapping;
389 int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
390
391 mapping = bus_map_single(pdev, cmd->request_buffer,
392 cmd->request_bufflen, dma_dir);
393 if (mapping) {
394 SYM_UCMD_PTR(cmd)->data_mapped = 1;
395 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
396 }
397
398 return mapping;
399 }
400
401 static int __map_scsi_sg_data(pcidev_t pdev, Scsi_Cmnd *cmd)
402 {
403 int use_sg;
404 int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
405
406 use_sg = bus_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
407 if (use_sg > 0) {
408 SYM_UCMD_PTR(cmd)->data_mapped = 2;
409 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
410 }
411
412 return use_sg;
413 }
414
415 static void __sync_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
416 {
417 int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
418
419 switch(SYM_UCMD_PTR(cmd)->data_mapped) {
420 case 2:
421 bus_dma_sync_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
422 break;
423 case 1:
424 bus_dma_sync_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
425 cmd->request_bufflen, dma_dir);
426 break;
427 }
428 }
429
430 #endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
431
432 #define unmap_scsi_data(np, cmd) \
433 __unmap_scsi_data(np->s.device, cmd)
434 #define map_scsi_single_data(np, cmd) \
435 __map_scsi_single_data(np->s.device, cmd)
436 #define map_scsi_sg_data(np, cmd) \
437 __map_scsi_sg_data(np->s.device, cmd)
438 #define sync_scsi_data(np, cmd) \
439 __sync_scsi_data(np->s.device, cmd)
440
441 /*
442 * Complete a pending CAM CCB.
443 */
444 void sym_xpt_done(hcb_p np, Scsi_Cmnd *ccb)
445 {
446 sym_remque(&SYM_UCMD_PTR(ccb)->link_cmdq);
447 unmap_scsi_data(np, ccb);
448 ccb->scsi_done(ccb);
449 }
450
451 void sym_xpt_done2(hcb_p np, Scsi_Cmnd *ccb, int cam_status)
452 {
453 sym_set_cam_status(ccb, cam_status);
454 sym_xpt_done(np, ccb);
455 }
456
457
458 /*
459 * Print something that identifies the IO.
460 */
461 void sym_print_addr (ccb_p cp)
462 {
463 Scsi_Cmnd *cmd = cp->cam_ccb;
464 if (cmd)
465 printf("%s:%d:%d:", sym_name(SYM_SOFTC_PTR(cmd)),
466 cmd->device->id,cmd->device->lun);
467 }
468
469 /*
470 * Tell the SCSI layer about a BUS RESET.
471 */
472 void sym_xpt_async_bus_reset(hcb_p np)
473 {
474 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
475 np->s.settle_time = ktime_get(sym_driver_setup.settle_delay * HZ);
476 np->s.settle_time_valid = 1;
477 if (sym_verbose >= 2)
478 printf_info("%s: command processing suspended for %d seconds\n",
479 sym_name(np), sym_driver_setup.settle_delay);
480 }
481
482 /*
483 * Tell the SCSI layer about a BUS DEVICE RESET message sent.
484 */
485 void sym_xpt_async_sent_bdr(hcb_p np, int target)
486 {
487 printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
488 }
489
490 /*
491 * Tell the SCSI layer about the new transfer parameters.
492 */
493 void sym_xpt_async_nego_wide(hcb_p np, int target)
494 {
495 if (sym_verbose < 3)
496 return;
497 sym_announce_transfer_rate(np, target);
498 }
499
500 /*
501 * Choose the more appropriate CAM status if
502 * the IO encountered an extended error.
503 */
504 static int sym_xerr_cam_status(int cam_status, int x_status)
505 {
506 if (x_status) {
507 if (x_status & XE_PARITY_ERR)
508 cam_status = DID_PARITY;
509 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
510 cam_status = DID_ERROR;
511 else if (x_status & XE_BAD_PHASE)
512 cam_status = DID_ERROR;
513 else
514 cam_status = DID_ERROR;
515 }
516 return cam_status;
517 }
518
519 /*
520 * Build CAM result for a failed or auto-sensed IO.
521 */
522 void sym_set_cam_result_error(hcb_p np, ccb_p cp, int resid)
523 {
524 Scsi_Cmnd *csio = cp->cam_ccb;
525 u_int cam_status, scsi_status, drv_status;
526
527 drv_status = 0;
528 cam_status = DID_OK;
529 scsi_status = cp->ssss_status;
530
531 if (cp->host_flags & HF_SENSE) {
532 scsi_status = cp->sv_scsi_status;
533 resid = cp->sv_resid;
534 if (sym_verbose && cp->sv_xerr_status)
535 sym_print_xerr(cp, cp->sv_xerr_status);
536 if (cp->host_status == HS_COMPLETE &&
537 cp->ssss_status == S_GOOD &&
538 cp->xerr_status == 0) {
539 cam_status = sym_xerr_cam_status(DID_OK,
540 cp->sv_xerr_status);
541 drv_status = DRIVER_SENSE;
542 /*
543 * Bounce back the sense data to user.
544 */
545 bzero(&csio->sense_buffer, sizeof(csio->sense_buffer));
546 bcopy(cp->sns_bbuf, csio->sense_buffer,
547 MIN(sizeof(csio->sense_buffer),SYM_SNS_BBUF_LEN));
548 #if 0
549 /*
550 * If the device reports a UNIT ATTENTION condition
551 * due to a RESET condition, we should consider all
552 * disconnect CCBs for this unit as aborted.
553 */
554 if (1) {
555 u_char *p;
556 p = (u_char *) csio->sense_data;
557 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
558 sym_clear_tasks(np, DID_ABORT,
559 cp->target,cp->lun, -1);
560 }
561 #endif
562 }
563 else
564 cam_status = DID_ERROR;
565 }
566 else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
567 cam_status = DID_OK;
568 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
569 cam_status = DID_NO_CONNECT;
570 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
571 cam_status = DID_ERROR;
572 else { /* Extended error */
573 if (sym_verbose) {
574 PRINT_ADDR(cp);
575 printf ("COMMAND FAILED (%x %x %x).\n",
576 cp->host_status, cp->ssss_status,
577 cp->xerr_status);
578 }
579 /*
580 * Set the most appropriate value for CAM status.
581 */
582 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
583 }
584 #if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,99)
585 csio->resid = resid;
586 #endif
587 csio->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
588 }
589
590
591 /*
592 * Called on successfull INQUIRY response.
593 */
594 void sym_sniff_inquiry(hcb_p np, Scsi_Cmnd *cmd, int resid)
595 {
596 int retv;
597
598 if (!cmd || cmd->use_sg)
599 return;
600
601 sync_scsi_data(np, cmd);
602 retv = __sym_sniff_inquiry(np, cmd->device->id, cmd->device->lun,
603 (u_char *) cmd->request_buffer,
604 cmd->request_bufflen - resid);
605 if (retv < 0)
606 return;
607 else if (retv)
608 sym_update_trans_settings(np, &np->target[cmd->device->id]);
609 }
610
611 /*
612 * Build the scatter/gather array for an I/O.
613 */
614
615 static int sym_scatter_no_sglist(hcb_p np, ccb_p cp, Scsi_Cmnd *cmd)
616 {
617 struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
618 int segment;
619
620 cp->data_len = cmd->request_bufflen;
621
622 if (cmd->request_bufflen) {
623 bus_addr_t baddr = map_scsi_single_data(np, cmd);
624 if (baddr) {
625 sym_build_sge(np, data, baddr, cmd->request_bufflen);
626 segment = 1;
627 }
628 else
629 segment = -2;
630 }
631 else
632 segment = 0;
633
634 return segment;
635 }
636
637 static int sym_scatter(hcb_p np, ccb_p cp, Scsi_Cmnd *cmd)
638 {
639 int segment;
640 int use_sg = (int) cmd->use_sg;
641
642 cp->data_len = 0;
643
644 if (!use_sg)
645 segment = sym_scatter_no_sglist(np, cp, cmd);
646 else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
647 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
648 struct sym_tblmove *data;
649
650 if (use_sg > SYM_CONF_MAX_SG) {
651 unmap_scsi_data(np, cmd);
652 return -1;
653 }
654
655 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
656
657 for (segment = 0; segment < use_sg; segment++) {
658 bus_addr_t baddr = bus_sg_dma_address(&scatter[segment]);
659 unsigned int len = bus_sg_dma_len(&scatter[segment]);
660
661 sym_build_sge(np, &data[segment], baddr, len);
662 cp->data_len += len;
663 }
664 }
665 else
666 segment = -2;
667
668 return segment;
669 }
670
671 /*
672 * Queue a SCSI command.
673 */
674 static int sym_queue_command(hcb_p np, Scsi_Cmnd *ccb)
675 {
676 /* Scsi_Device *device = ccb->device; */
677 tcb_p tp;
678 lcb_p lp;
679 ccb_p cp;
680 int order;
681
682 /*
683 * Minimal checkings, so that we will not
684 * go outside our tables.
685 */
686 if (ccb->device->id == np->myaddr ||
687 ccb->device->id >= SYM_CONF_MAX_TARGET ||
688 ccb->device->lun >= SYM_CONF_MAX_LUN) {
689 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
690 return 0;
691 }
692
693 /*
694 * Retreive the target descriptor.
695 */
696 tp = &np->target[ccb->device->id];
697
698 /*
699 * Complete the 1st INQUIRY command with error
700 * condition if the device is flagged NOSCAN
701 * at BOOT in the NVRAM. This may speed up
702 * the boot and maintain coherency with BIOS
703 * device numbering. Clearing the flag allows
704 * user to rescan skipped devices later.
705 * We also return error for devices not flagged
706 * for SCAN LUNS in the NVRAM since some mono-lun
707 * devices behave badly when asked for some non
708 * zero LUN. Btw, this is an absolute hack.:-)
709 */
710 if (ccb->cmnd[0] == 0x12 || ccb->cmnd[0] == 0x0) {
711 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
712 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
713 ccb->device->lun != 0)) {
714 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
715 sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
716 return 0;
717 }
718 }
719
720 /*
721 * Select tagged/untagged.
722 */
723 lp = sym_lp(np, tp, ccb->device->lun);
724 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
725
726 /*
727 * Queue the SCSI IO.
728 */
729 cp = sym_get_ccb(np, ccb->device->id, ccb->device->lun, order);
730 if (!cp)
731 return 1; /* Means resource shortage */
732 (void) sym_queue_scsiio(np, ccb, cp);
733 return 0;
734 }
735
736 /*
737 * Setup buffers and pointers that address the CDB.
738 */
739 static int __inline sym_setup_cdb(hcb_p np, Scsi_Cmnd *ccb, ccb_p cp)
740 {
741 u32 cmd_ba;
742 int cmd_len;
743
744 /*
745 * CDB is 16 bytes max.
746 */
747 if (ccb->cmd_len > sizeof(cp->cdb_buf)) {
748 sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
749 return -1;
750 }
751
752 bcopy(ccb->cmnd, cp->cdb_buf, ccb->cmd_len);
753 cmd_ba = CCB_BA (cp, cdb_buf[0]);
754 cmd_len = ccb->cmd_len;
755
756 cp->phys.cmd.addr = cpu_to_scr(cmd_ba);
757 cp->phys.cmd.size = cpu_to_scr(cmd_len);
758
759 return 0;
760 }
761
762 /*
763 * Setup pointers that address the data and start the I/O.
764 */
765 int sym_setup_data_and_start(hcb_p np, Scsi_Cmnd *csio, ccb_p cp)
766 {
767 int dir;
768 tcb_p tp = &np->target[cp->target];
769 lcb_p lp = sym_lp(np, tp, cp->lun);
770
771 /*
772 * Build the CDB.
773 */
774 if (sym_setup_cdb(np, csio, cp))
775 goto out_abort;
776
777 /*
778 * No direction means no data.
779 */
780 dir = scsi_data_direction(csio);
781 if (dir != SCSI_DATA_NONE) {
782 cp->segments = sym_scatter (np, cp, csio);
783 if (cp->segments < 0) {
784 if (cp->segments == -2)
785 sym_set_cam_status(csio, CAM_RESRC_UNAVAIL);
786 else
787 sym_set_cam_status(csio, CAM_REQ_TOO_BIG);
788 goto out_abort;
789 }
790 }
791 else {
792 cp->data_len = 0;
793 cp->segments = 0;
794 }
795
796 /*
797 * Set data pointers.
798 */
799 sym_setup_data_pointers(np, cp, dir);
800
801 /*
802 * When `#ifed 1', the code below makes the driver
803 * panic on the first attempt to write to a SCSI device.
804 * It is the first test we want to do after a driver
805 * change that does not seem obviously safe. :)
806 */
807 #if 0
808 switch (cp->cdb_buf[0]) {
809 case 0x0A: case 0x2A: case 0xAA:
810 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
811 MDELAY(10000);
812 break;
813 default:
814 break;
815 }
816 #endif
817
818 /*
819 * activate this job.
820 */
821 if (lp)
822 sym_start_next_ccbs(np, lp, 2);
823 else
824 sym_put_start_queue(np, cp);
825 return 0;
826
827 out_abort:
828 sym_free_ccb(np, cp);
829 sym_xpt_done(np, csio);
830 return 0;
831 }
832
833
834 /*
835 * timer daemon.
836 *
837 * Misused to keep the driver running when
838 * interrupts are not configured correctly.
839 */
840 static void sym_timer (hcb_p np)
841 {
842 u_long thistime = ktime_get(0);
843
844 #if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 0)
845 /*
846 * If release process in progress, let's go
847 * Set the release stage from 1 to 2 to synchronize
848 * with the release process.
849 */
850
851 if (np->s.release_stage) {
852 if (np->s.release_stage == 1)
853 np->s.release_stage = 2;
854 return;
855 }
856 #endif
857
858 /*
859 * Restart the timer.
860 */
861 #ifdef SYM_CONF_PCIQ_BROKEN_INTR
862 np->s.timer.expires = ktime_get((HZ+99)/100);
863 #else
864 np->s.timer.expires = ktime_get(SYM_CONF_TIMER_INTERVAL);
865 #endif
866 add_timer(&np->s.timer);
867
868 /*
869 * If we are resetting the ncr, wait for settle_time before
870 * clearing it. Then command processing will be resumed.
871 */
872 if (np->s.settle_time_valid) {
873 if (ktime_dif(np->s.settle_time, thistime) <= 0){
874 if (sym_verbose >= 2 )
875 printk("%s: command processing resumed\n",
876 sym_name(np));
877 np->s.settle_time_valid = 0;
878 }
879 return;
880 }
881
882 /*
883 * Nothing to do for now, but that may come.
884 */
885 if (np->s.lasttime + 4*HZ < thistime) {
886 np->s.lasttime = thistime;
887 }
888
889 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
890 /*
891 * Some way-broken PCI bridges may lead to
892 * completions being lost when the clearing
893 * of the INTFLY flag by the CPU occurs
894 * concurrently with the chip raising this flag.
895 * If this ever happen, lost completions will
896 * be reaped here.
897 */
898 sym_wakeup_done(np);
899 #endif
900
901 #ifdef SYM_CONF_PCIQ_BROKEN_INTR
902 if (INB(nc_istat) & (INTF|SIP|DIP)) {
903
904 /*
905 ** Process pending interrupts.
906 */
907 if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
908 sym_interrupt(np);
909 if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
910 }
911 #endif /* SYM_CONF_PCIQ_BROKEN_INTR */
912 }
913
914
915 /*
916 * PCI BUS error handler.
917 */
918 void sym_log_bus_error(hcb_p np)
919 {
920 u_short pci_sts;
921 pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
922 if (pci_sts & 0xf900) {
923 pci_write_config_word(np->s.device, PCI_STATUS,
924 pci_sts);
925 printf("%s: PCI STATUS = 0x%04x\n",
926 sym_name(np), pci_sts & 0xf900);
927 }
928 }
929
930
931 /*
932 * Requeue awaiting commands.
933 */
934 static void sym_requeue_awaiting_cmds(hcb_p np)
935 {
936 Scsi_Cmnd *cmd;
937 ucmd_p ucp = SYM_UCMD_PTR(cmd);
938 SYM_QUEHEAD tmp_cmdq;
939 int sts;
940
941 sym_que_move(&np->s.wait_cmdq, &tmp_cmdq);
942
943 while ((ucp = (ucmd_p) sym_remque_head(&tmp_cmdq)) != 0) {
944 sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
945 cmd = SYM_SCMD_PTR(ucp);
946 sts = sym_queue_command(np, cmd);
947 if (sts) {
948 sym_remque(&ucp->link_cmdq);
949 sym_insque_head(&ucp->link_cmdq, &np->s.wait_cmdq);
950 }
951 }
952 }
953
954 /*
955 * Linux entry point of the queuecommand() function
956 */
957 int sym53c8xx_queue_command (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
958 {
959 hcb_p np = SYM_SOFTC_PTR(cmd);
960 ucmd_p ucp = SYM_UCMD_PTR(cmd);
961 int sts = 0;
962 #if 0
963 u_long flags;
964 #endif
965
966 cmd->scsi_done = done;
967 cmd->host_scribble = NULL;
968 memset(ucp, 0, sizeof(*ucp));
969
970 #if 0
971 SYM_LOCK_HCB(np, flags);
972 #endif
973
974 /*
975 * Shorten our settle_time if needed for
976 * this command not to time out.
977 */
978 if (np->s.settle_time_valid && cmd->timeout_per_command) {
979 u_long tlimit = ktime_get(cmd->timeout_per_command);
980 tlimit = ktime_sub(tlimit, SYM_CONF_TIMER_INTERVAL*2);
981 if (ktime_dif(np->s.settle_time, tlimit) > 0) {
982 np->s.settle_time = tlimit;
983 }
984 }
985
986 if (np->s.settle_time_valid || !sym_que_empty(&np->s.wait_cmdq)) {
987 sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
988 goto out;
989 }
990
991 sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
992 sts = sym_queue_command(np, cmd);
993 if (sts) {
994 sym_remque(&ucp->link_cmdq);
995 sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
996 }
997 out:
998 #if 0
999 SYM_UNLOCK_HCB(np, flags);
1000 #endif
1001
1002 return 0;
1003 }
1004
1005 /*
1006 * Linux entry point of the interrupt handler.
1007 */
1008 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
1009 {
1010 unsigned long flags;
1011 hcb_p np = (hcb_p) dev_id;
1012
1013 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
1014
1015 SYM_LOCK_HCB(np, flags);
1016
1017 sym_interrupt(np);
1018
1019 /*
1020 * push queue walk-through to tasklet
1021 */
1022 if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
1023 sym_requeue_awaiting_cmds(np);
1024
1025 SYM_UNLOCK_HCB(np, flags);
1026
1027 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
1028
1029 return IRQ_HANDLED;
1030 }
1031
1032 /*
1033 * Linux entry point of the timer handler
1034 */
1035 static void sym53c8xx_timer(unsigned long npref)
1036 {
1037 hcb_p np = (hcb_p) npref;
1038 unsigned long flags;
1039
1040 SYM_LOCK_HCB(np, flags);
1041
1042 sym_timer(np);
1043
1044 if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
1045 sym_requeue_awaiting_cmds(np);
1046
1047 SYM_UNLOCK_HCB(np, flags);
1048 }
1049
1050
1051 /*
1052 * What the eh thread wants us to perform.
1053 */
1054 #define SYM_EH_ABORT 0
1055 #define SYM_EH_DEVICE_RESET 1
1056 #define SYM_EH_BUS_RESET 2
1057 #define SYM_EH_HOST_RESET 3
1058
1059 /*
1060 * What we will do regarding the involved SCSI command.
1061 */
1062 #define SYM_EH_DO_IGNORE 0
1063 #define SYM_EH_DO_COMPLETE 1
1064 #define SYM_EH_DO_WAIT 2
1065
1066 /*
1067 * Our general completion handler.
1068 */
1069 static void __sym_eh_done(Scsi_Cmnd *cmd, int timed_out)
1070 {
1071 struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
1072 if (!ep)
1073 return;
1074
1075 /* Try to avoid a race here (not 100% safe) */
1076 if (!timed_out) {
1077 ep->timed_out = 0;
1078 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
1079 return;
1080 }
1081
1082 /* Revert everything */
1083 SYM_UCMD_PTR(cmd)->eh_wait = 0;
1084 cmd->scsi_done = ep->old_done;
1085
1086 /* Wake up the eh thread if it wants to sleep */
1087 if (ep->to_do == SYM_EH_DO_WAIT)
1088 up(&ep->sem);
1089 }
1090
1091 /*
1092 * scsi_done() alias when error recovery is in progress.
1093 */
1094 static void sym_eh_done(Scsi_Cmnd *cmd) { __sym_eh_done(cmd, 0); }
1095
1096 /*
1097 * Some timeout handler to avoid waiting too long.
1098 */
1099 static void sym_eh_timeout(u_long p) { __sym_eh_done((Scsi_Cmnd *)p, 1); }
1100
1101 /*
1102 * Generic method for our eh processing.
1103 * The 'op' argument tells what we have to do.
1104 */
1105 static int sym_eh_handler(int op, char *opname, Scsi_Cmnd *cmd)
1106 {
1107 hcb_p np = SYM_SOFTC_PTR(cmd);
1108 SYM_QUEHEAD *qp;
1109 int to_do = SYM_EH_DO_IGNORE;
1110 int sts = -1;
1111 struct sym_eh_wait eh, *ep = &eh;
1112 char devname[20];
1113
1114 sprintf(devname, "%s:%d:%d", sym_name(np), cmd->device->id, cmd->device->lun);
1115
1116 printf_warning("%s: %s operation started.\n", devname, opname);
1117
1118 #if 0
1119 /* This one should be the result of some race, thus to ignore */
1120 if (cmd->serial_number != cmd->serial_number_at_timeout)
1121 goto prepare;
1122 #endif
1123
1124 /* This one is not queued to the core driver -> to complete here */
1125 FOR_EACH_QUEUED_ELEMENT(&np->s.wait_cmdq, qp) {
1126 if (SYM_SCMD_PTR(qp) == cmd) {
1127 to_do = SYM_EH_DO_COMPLETE;
1128 goto prepare;
1129 }
1130 }
1131
1132 /* This one is queued in some place -> to wait for completion */
1133 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
1134 ccb_p cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
1135 if (cp->cam_ccb == cmd) {
1136 to_do = SYM_EH_DO_WAIT;
1137 goto prepare;
1138 }
1139 }
1140
1141 prepare:
1142 /* Prepare stuff to either ignore, complete or wait for completion */
1143 switch(to_do) {
1144 default:
1145 case SYM_EH_DO_IGNORE:
1146 goto finish;
1147 break;
1148 case SYM_EH_DO_WAIT:
1149 #if LINUX_VERSION_CODE > LinuxVersionCode(2,3,0)
1150 init_MUTEX_LOCKED(&ep->sem);
1151 #else
1152 ep->sem = MUTEX_LOCKED;
1153 #endif
1154 /* fall through */
1155 case SYM_EH_DO_COMPLETE:
1156 ep->old_done = cmd->scsi_done;
1157 cmd->scsi_done = sym_eh_done;
1158 SYM_UCMD_PTR(cmd)->eh_wait = ep;
1159 }
1160
1161 /* Try to proceed the operation we have been asked for */
1162 sts = -1;
1163 switch(op) {
1164 case SYM_EH_ABORT:
1165 sts = sym_abort_scsiio(np, cmd, 1);
1166 break;
1167 case SYM_EH_DEVICE_RESET:
1168 sts = sym_reset_scsi_target(np, cmd->device->id);
1169 break;
1170 case SYM_EH_BUS_RESET:
1171 sym_reset_scsi_bus(np, 1);
1172 sts = 0;
1173 break;
1174 case SYM_EH_HOST_RESET:
1175 sym_reset_scsi_bus(np, 0);
1176 sym_start_up (np, 1);
1177 sts = 0;
1178 break;
1179 default:
1180 break;
1181 }
1182
1183 /* On error, restore everything and cross fingers :) */
1184 if (sts) {
1185 SYM_UCMD_PTR(cmd)->eh_wait = 0;
1186 cmd->scsi_done = ep->old_done;
1187 to_do = SYM_EH_DO_IGNORE;
1188 }
1189
1190 finish:
1191 ep->to_do = to_do;
1192 /* Complete the command with locks held as required by the driver */
1193 if (to_do == SYM_EH_DO_COMPLETE)
1194 sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
1195
1196 /* Wait for completion with locks released, as required by kernel */
1197 if (to_do == SYM_EH_DO_WAIT) {
1198 init_timer(&ep->timer);
1199 ep->timer.expires = jiffies + (5*HZ);
1200 ep->timer.function = sym_eh_timeout;
1201 ep->timer.data = (u_long)cmd;
1202 ep->timed_out = 1; /* Be pessimistic for once :) */
1203 add_timer(&ep->timer);
1204 down(&ep->sem);
1205 if (ep->timed_out)
1206 sts = -2;
1207 }
1208 printf_warning("%s: %s operation %s.\n", devname, opname,
1209 sts==0?"complete":sts==-2?"timed-out":"failed");
1210 return sts? SCSI_FAILED : SCSI_SUCCESS;
1211 }
1212
1213
1214 /*
1215 * Error handlers called from the eh thread (one thread per HBA).
1216 */
1217 int sym53c8xx_eh_abort_handler(Scsi_Cmnd *cmd)
1218 {
1219 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
1220 }
1221
1222 int sym53c8xx_eh_device_reset_handler(Scsi_Cmnd *cmd)
1223 {
1224 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
1225 }
1226
1227 int sym53c8xx_eh_bus_reset_handler(Scsi_Cmnd *cmd)
1228 {
1229 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
1230 }
1231
1232 int sym53c8xx_eh_host_reset_handler(Scsi_Cmnd *cmd)
1233 {
1234 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
1235 }
1236
1237 /*
1238 * Tune device queuing depth, according to various limits.
1239 */
1240 static void
1241 sym_tune_dev_queuing(hcb_p np, int target, int lun, u_short reqtags)
1242 {
1243 tcb_p tp = &np->target[target];
1244 lcb_p lp = sym_lp(np, tp, lun);
1245 u_short oldtags;
1246
1247 if (!lp)
1248 return;
1249
1250 oldtags = lp->s.reqtags;
1251
1252 if (reqtags > lp->s.scdev_depth)
1253 reqtags = lp->s.scdev_depth;
1254
1255 lp->started_limit = reqtags ? reqtags : 2;
1256 lp->started_max = 1;
1257 lp->s.reqtags = reqtags;
1258
1259 if (reqtags != oldtags) {
1260 printf_info("%s:%d:%d: "
1261 "tagged command queuing %s, command queue depth %d.\n",
1262 sym_name(np), target, lun,
1263 lp->s.reqtags ? "enabled" : "disabled",
1264 lp->started_limit);
1265 }
1266 }
1267
1268 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
1269 /*
1270 * Linux select queue depths function
1271 */
1272 #define DEF_DEPTH (sym_driver_setup.max_tag)
1273 #define ALL_TARGETS -2
1274 #define NO_TARGET -1
1275 #define ALL_LUNS -2
1276 #define NO_LUN -1
1277
1278 static int device_queue_depth(hcb_p np, int target, int lun)
1279 {
1280 int c, h, t, u, v;
1281 char *p = sym_driver_setup.tag_ctrl;
1282 char *ep;
1283
1284 h = -1;
1285 t = NO_TARGET;
1286 u = NO_LUN;
1287 while ((c = *p++) != 0) {
1288 v = simple_strtoul(p, &ep, 0);
1289 switch(c) {
1290 case '/':
1291 ++h;
1292 t = ALL_TARGETS;
1293 u = ALL_LUNS;
1294 break;
1295 case 't':
1296 if (t != target)
1297 t = (target == v) ? v : NO_TARGET;
1298 u = ALL_LUNS;
1299 break;
1300 case 'u':
1301 if (u != lun)
1302 u = (lun == v) ? v : NO_LUN;
1303 break;
1304 case 'q':
1305 if (h == np->s.unit &&
1306 (t == ALL_TARGETS || t == target) &&
1307 (u == ALL_LUNS || u == lun))
1308 return v;
1309 break;
1310 case '-':
1311 t = ALL_TARGETS;
1312 u = ALL_LUNS;
1313 break;
1314 default:
1315 break;
1316 }
1317 p = ep;
1318 }
1319 return DEF_DEPTH;
1320 }
1321 #else
1322 #define device_queue_depth(np, t, l) (sym_driver_setup.max_tag)
1323 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
1324
1325 /*
1326 * Linux entry point for device queue sizing.
1327 */
1328 int
1329 sym53c8xx_slave_configure(Scsi_Device *device)
1330 {
1331 struct Scsi_Host *host = device->host;
1332 hcb_p np;
1333 tcb_p tp;
1334 lcb_p lp;
1335 int reqtags, depth_to_use;
1336
1337 np = ((struct host_data *) host->hostdata)->ncb;
1338 tp = &np->target[device->id];
1339
1340 /*
1341 * Get user settings for transfer parameters.
1342 */
1343 tp->inq_byte7_valid = (INQ7_SYNC|INQ7_WIDE16);
1344 sym_update_trans_settings(np, tp);
1345
1346 /*
1347 * Allocate the LCB if not yet.
1348 * If it fail, we may well be in the sh*t. :)
1349 */
1350 lp = sym_alloc_lcb(np, device->id, device->lun);
1351 if (!lp)
1352 return -ENOMEM;
1353
1354 /*
1355 * Get user flags.
1356 */
1357 lp->curr_flags = lp->user_flags;
1358
1359 /*
1360 * Select queue depth from driver setup.
1361 * Donnot use more than configured by user.
1362 * Use at least 2.
1363 * Donnot use more than our maximum.
1364 */
1365 reqtags = device_queue_depth(np, device->id, device->lun);
1366 if (reqtags > tp->usrtags)
1367 reqtags = tp->usrtags;
1368 if (!device->tagged_supported)
1369 reqtags = 0;
1370 #if 1 /* Avoid to locally queue commands for no good reasons */
1371 if (reqtags > SYM_CONF_MAX_TAG)
1372 reqtags = SYM_CONF_MAX_TAG;
1373 depth_to_use = (reqtags ? reqtags : 2);
1374 #else
1375 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1376 #endif
1377 scsi_adjust_queue_depth(device,
1378 (device->tagged_supported ?
1379 MSG_SIMPLE_TAG : 0),
1380 depth_to_use);
1381 lp->s.scdev_depth = depth_to_use;
1382 sym_tune_dev_queuing(np, device->id, device->lun, reqtags);
1383
1384 return 0;
1385 }
1386
1387 /*
1388 * Linux entry point for info() function
1389 */
1390 const char *sym53c8xx_info (struct Scsi_Host *host)
1391 {
1392 return sym_driver_name();
1393 }
1394
1395
1396 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1397 /*
1398 * Proc file system stuff
1399 *
1400 * A read operation returns adapter information.
1401 * A write operation is a control command.
1402 * The string is parsed in the driver code and the command is passed
1403 * to the sym_usercmd() function.
1404 */
1405
1406 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1407
1408 struct sym_usrcmd {
1409 u_long target;
1410 u_long lun;
1411 u_long data;
1412 u_long cmd;
1413 };
1414
1415 #define UC_SETSYNC 10
1416 #define UC_SETTAGS 11
1417 #define UC_SETDEBUG 12
1418 #define UC_SETWIDE 14
1419 #define UC_SETFLAG 15
1420 #define UC_SETVERBOSE 17
1421 #define UC_RESETDEV 18
1422 #define UC_CLEARDEV 19
1423
1424 static void sym_exec_user_command (hcb_p np, struct sym_usrcmd *uc)
1425 {
1426 tcb_p tp;
1427 int t, l;
1428
1429 switch (uc->cmd) {
1430 case 0: return;
1431
1432 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1433 case UC_SETDEBUG:
1434 sym_debug_flags = uc->data;
1435 break;
1436 #endif
1437 case UC_SETVERBOSE:
1438 np->verbose = uc->data;
1439 break;
1440 default:
1441 /*
1442 * We assume that other commands apply to targets.
1443 * This should always be the case and avoid the below
1444 * 4 lines to be repeated 6 times.
1445 */
1446 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1447 if (!((uc->target >> t) & 1))
1448 continue;
1449 tp = &np->target[t];
1450
1451 switch (uc->cmd) {
1452
1453 case UC_SETSYNC:
1454 if (!uc->data || uc->data >= 255) {
1455 tp->tinfo.goal.options = 0;
1456 tp->tinfo.goal.offset = 0;
1457 break;
1458 }
1459 if (uc->data <= 9 && np->minsync_dt) {
1460 if (uc->data < np->minsync_dt)
1461 uc->data = np->minsync_dt;
1462 tp->tinfo.goal.options = PPR_OPT_DT;
1463 tp->tinfo.goal.width = 1;
1464 tp->tinfo.goal.period = uc->data;
1465 tp->tinfo.goal.offset = np->maxoffs_dt;
1466 }
1467 else {
1468 if (uc->data < np->minsync)
1469 uc->data = np->minsync;
1470 tp->tinfo.goal.options = 0;
1471 tp->tinfo.goal.period = uc->data;
1472 tp->tinfo.goal.offset = np->maxoffs;
1473 }
1474 break;
1475 case UC_SETWIDE:
1476 tp->tinfo.goal.width = uc->data ? 1 : 0;
1477 break;
1478 case UC_SETTAGS:
1479 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1480 sym_tune_dev_queuing(np, t,l, uc->data);
1481 break;
1482 case UC_RESETDEV:
1483 tp->to_reset = 1;
1484 np->istat_sem = SEM;
1485 OUTB (nc_istat, SIGP|SEM);
1486 break;
1487 case UC_CLEARDEV:
1488 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1489 lcb_p lp = sym_lp(np, tp, l);
1490 if (lp) lp->to_clear = 1;
1491 }
1492 np->istat_sem = SEM;
1493 OUTB (nc_istat, SIGP|SEM);
1494 break;
1495 case UC_SETFLAG:
1496 tp->usrflags = uc->data;
1497 break;
1498 }
1499 }
1500 break;
1501 }
1502 }
1503
1504 #define is_digit(c) ((c) >= '0' && (c) <= '9')
1505 #define digit_to_bin(c) ((c) - '0')
1506 #define is_space(c) ((c) == ' ' || (c) == '\t')
1507
1508 static int skip_spaces(char *ptr, int len)
1509 {
1510 int cnt, c;
1511
1512 for (cnt = len; cnt > 0 && (c = *ptr++) && is_space(c); cnt--);
1513
1514 return (len - cnt);
1515 }
1516
1517 static int get_int_arg(char *ptr, int len, u_long *pv)
1518 {
1519 int cnt, c;
1520 u_long v;
1521
1522 for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && is_digit(c); cnt--) {
1523 v = (v * 10) + digit_to_bin(c);
1524 }
1525
1526 if (pv)
1527 *pv = v;
1528
1529 return (len - cnt);
1530 }
1531
1532 static int is_keyword(char *ptr, int len, char *verb)
1533 {
1534 int verb_len = strlen(verb);
1535
1536 if (len >= strlen(verb) && !memcmp(verb, ptr, verb_len))
1537 return verb_len;
1538 else
1539 return 0;
1540
1541 }
1542
1543 #define SKIP_SPACES(min_spaces) \
1544 if ((arg_len = skip_spaces(ptr, len)) < (min_spaces)) \
1545 return -EINVAL; \
1546 ptr += arg_len; len -= arg_len;
1547
1548 #define GET_INT_ARG(v) \
1549 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1550 return -EINVAL; \
1551 ptr += arg_len; len -= arg_len;
1552
1553
1554 /*
1555 * Parse a control command
1556 */
1557
1558 static int sym_user_command(hcb_p np, char *buffer, int length)
1559 {
1560 char *ptr = buffer;
1561 int len = length;
1562 struct sym_usrcmd cmd, *uc = &cmd;
1563 int arg_len;
1564 u_long target;
1565
1566 bzero(uc, sizeof(*uc));
1567
1568 if (len > 0 && ptr[len-1] == '\n')
1569 --len;
1570
1571 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1572 uc->cmd = UC_SETSYNC;
1573 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1574 uc->cmd = UC_SETTAGS;
1575 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1576 uc->cmd = UC_SETVERBOSE;
1577 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1578 uc->cmd = UC_SETWIDE;
1579 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1580 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1581 uc->cmd = UC_SETDEBUG;
1582 #endif
1583 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1584 uc->cmd = UC_SETFLAG;
1585 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1586 uc->cmd = UC_RESETDEV;
1587 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1588 uc->cmd = UC_CLEARDEV;
1589 else
1590 arg_len = 0;
1591
1592 #ifdef DEBUG_PROC_INFO
1593 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1594 #endif
1595
1596 if (!arg_len)
1597 return -EINVAL;
1598 ptr += arg_len; len -= arg_len;
1599
1600 switch(uc->cmd) {
1601 case UC_SETSYNC:
1602 case UC_SETTAGS:
1603 case UC_SETWIDE:
1604 case UC_SETFLAG:
1605 case UC_RESETDEV:
1606 case UC_CLEARDEV:
1607 SKIP_SPACES(1);
1608 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1609 ptr += arg_len; len -= arg_len;
1610 uc->target = ~0;
1611 } else {
1612 GET_INT_ARG(target);
1613 uc->target = (1<<target);
1614 #ifdef DEBUG_PROC_INFO
1615 printk("sym_user_command: target=%ld\n", target);
1616 #endif
1617 }
1618 break;
1619 }
1620
1621 switch(uc->cmd) {
1622 case UC_SETVERBOSE:
1623 case UC_SETSYNC:
1624 case UC_SETTAGS:
1625 case UC_SETWIDE:
1626 SKIP_SPACES(1);
1627 GET_INT_ARG(uc->data);
1628 #ifdef DEBUG_PROC_INFO
1629 printk("sym_user_command: data=%ld\n", uc->data);
1630 #endif
1631 break;
1632 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1633 case UC_SETDEBUG:
1634 while (len > 0) {
1635 SKIP_SPACES(1);
1636 if ((arg_len = is_keyword(ptr, len, "alloc")))
1637 uc->data |= DEBUG_ALLOC;
1638 else if ((arg_len = is_keyword(ptr, len, "phase")))
1639 uc->data |= DEBUG_PHASE;
1640 else if ((arg_len = is_keyword(ptr, len, "queue")))
1641 uc->data |= DEBUG_QUEUE;
1642 else if ((arg_len = is_keyword(ptr, len, "result")))
1643 uc->data |= DEBUG_RESULT;
1644 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1645 uc->data |= DEBUG_SCATTER;
1646 else if ((arg_len = is_keyword(ptr, len, "script")))
1647 uc->data |= DEBUG_SCRIPT;
1648 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1649 uc->data |= DEBUG_TINY;
1650 else if ((arg_len = is_keyword(ptr, len, "timing")))
1651 uc->data |= DEBUG_TIMING;
1652 else if ((arg_len = is_keyword(ptr, len, "nego")))
1653 uc->data |= DEBUG_NEGO;
1654 else if ((arg_len = is_keyword(ptr, len, "tags")))
1655 uc->data |= DEBUG_TAGS;
1656 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1657 uc->data |= DEBUG_POINTER;
1658 else
1659 return -EINVAL;
1660 ptr += arg_len; len -= arg_len;
1661 }
1662 #ifdef DEBUG_PROC_INFO
1663 printk("sym_user_command: data=%ld\n", uc->data);
1664 #endif
1665 break;
1666 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1667 case UC_SETFLAG:
1668 while (len > 0) {
1669 SKIP_SPACES(1);
1670 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1671 uc->data &= ~SYM_DISC_ENABLED;
1672 else
1673 return -EINVAL;
1674 ptr += arg_len; len -= arg_len;
1675 }
1676 break;
1677 default:
1678 break;
1679 }
1680
1681 if (len)
1682 return -EINVAL;
1683 else {
1684 unsigned long flags;
1685
1686 SYM_LOCK_HCB(np, flags);
1687 sym_exec_user_command (np, uc);
1688 SYM_UNLOCK_HCB(np, flags);
1689 }
1690 return length;
1691 }
1692
1693 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1694
1695
1696 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1697 /*
1698 * Informations through the proc file system.
1699 */
1700 struct info_str {
1701 char *buffer;
1702 int length;
1703 int offset;
1704 int pos;
1705 };
1706
1707 static void copy_mem_info(struct info_str *info, char *data, int len)
1708 {
1709 if (info->pos + len > info->length)
1710 len = info->length - info->pos;
1711
1712 if (info->pos + len < info->offset) {
1713 info->pos += len;
1714 return;
1715 }
1716 if (info->pos < info->offset) {
1717 data += (info->offset - info->pos);
1718 len -= (info->offset - info->pos);
1719 }
1720
1721 if (len > 0) {
1722 memcpy(info->buffer + info->pos, data, len);
1723 info->pos += len;
1724 }
1725 }
1726
1727 static int copy_info(struct info_str *info, char *fmt, ...)
1728 {
1729 va_list args;
1730 char buf[81];
1731 int len;
1732
1733 va_start(args, fmt);
1734 len = vsprintf(buf, fmt, args);
1735 va_end(args);
1736
1737 copy_mem_info(info, buf, len);
1738 return len;
1739 }
1740
1741 /*
1742 * Copy formatted information into the input buffer.
1743 */
1744 static int sym_host_info(hcb_p np, char *ptr, off_t offset, int len)
1745 {
1746 struct info_str info;
1747
1748 info.buffer = ptr;
1749 info.length = len;
1750 info.offset = offset;
1751 info.pos = 0;
1752
1753 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1754 "revision id 0x%x\n",
1755 np->s.chip_name, np->device_id, np->revision_id);
1756 copy_info(&info, "On PCI bus %d, device %d, function %d, "
1757 #ifdef __sparc__
1758 "IRQ %s\n",
1759 #else
1760 "IRQ %d\n",
1761 #endif
1762 np->s.bus, (np->s.device_fn & 0xf8) >> 3, np->s.device_fn & 7,
1763 #ifdef __sparc__
1764 __irq_itoa(np->s.irq));
1765 #else
1766 (int) np->s.irq);
1767 #endif
1768 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1769 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1770 np->maxwide ? "Wide" : "Narrow",
1771 np->minsync_dt ? ", DT capable" : "");
1772
1773 copy_info(&info, "Max. started commands %d, "
1774 "max. commands per LUN %d\n",
1775 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1776
1777 return info.pos > info.offset? info.pos - info.offset : 0;
1778 }
1779 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1780
1781 /*
1782 * Entry point of the scsi proc fs of the driver.
1783 * - func = 0 means read (returns adapter infos)
1784 * - func = 1 means write (not yet merget from sym53c8xx)
1785 */
1786 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
1787 int length, int func)
1788 {
1789 struct host_data *host_data;
1790 hcb_p np = 0;
1791 int retv;
1792
1793 host_data = (struct host_data *) host->hostdata;
1794 np = host_data->ncb;
1795 if (!np)
1796 return -EINVAL;
1797
1798 if (func) {
1799 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1800 retv = sym_user_command(np, buffer, length);
1801 #else
1802 retv = -EINVAL;
1803 #endif
1804 }
1805 else {
1806 if (start)
1807 *start = buffer;
1808 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1809 retv = sym_host_info(np, buffer, offset, length);
1810 #else
1811 retv = -EINVAL;
1812 #endif
1813 }
1814
1815 return retv;
1816 }
1817 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1818
1819 /*
1820 * Free controller resources.
1821 */
1822 static void sym_free_resources(hcb_p np)
1823 {
1824 /*
1825 * Free O/S specific resources.
1826 */
1827 if (np->s.irq)
1828 free_irq(np->s.irq, np);
1829 if (np->s.io_port)
1830 release_region(np->s.io_port, np->s.io_ws);
1831 #ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
1832 if (np->s.mmio_va)
1833 pci_unmap_mem(np->s.mmio_va, np->s.io_ws);
1834 if (np->s.ram_va)
1835 pci_unmap_mem(np->s.ram_va, np->ram_ws);
1836 #endif
1837 /*
1838 * Free O/S independent resources.
1839 */
1840 sym_hcb_free(np);
1841
1842 sym_mfree_dma(np, sizeof(*np), "HCB");
1843 }
1844
1845 /*
1846 * Ask/tell the system about DMA addressing.
1847 */
1848 #ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
1849 static int sym_setup_bus_dma_mask(hcb_p np)
1850 {
1851 #if LINUX_VERSION_CODE < LinuxVersionCode(2,4,3)
1852 if (!pci_dma_supported(np->s.device, 0xffffffffUL))
1853 goto out_err32;
1854 #else
1855 #if SYM_CONF_DMA_ADDRESSING_MODE == 0
1856 if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
1857 goto out_err32;
1858 #else
1859 #if SYM_CONF_DMA_ADDRESSING_MODE == 1
1860 #define PciDmaMask 0xffffffffff
1861 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1862 #define PciDmaMask 0xffffffffffffffffULL
1863 #endif
1864 if (np->features & FE_DAC) {
1865 if (!pci_set_dma_mask(np->s.device, PciDmaMask)) {
1866 np->use_dac = 1;
1867 printf_info("%s: using 64 bit DMA addressing\n",
1868 sym_name(np));
1869 }
1870 else {
1871 if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
1872 goto out_err32;
1873 }
1874 }
1875 #undef PciDmaMask
1876 #endif
1877 #endif
1878 return 0;
1879
1880 out_err32:
1881 printf_warning("%s: 32 BIT DMA ADDRESSING NOT SUPPORTED\n",
1882 sym_name(np));
1883 return -1;
1884 }
1885 #endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
1886
1887 /*
1888 * Host attach and initialisations.
1889 *
1890 * Allocate host data and ncb structure.
1891 * Request IO region and remap MMIO region.
1892 * Do chip initialization.
1893 * If all is OK, install interrupt handling and
1894 * start the timer daemon.
1895 */
1896 static int __init
1897 sym_attach (Scsi_Host_Template *tpnt, int unit, sym_device *dev)
1898 {
1899 struct host_data *host_data;
1900 hcb_p np = 0;
1901 struct Scsi_Host *instance = 0;
1902 u_long flags = 0;
1903 sym_nvram *nvram = dev->nvram;
1904 struct sym_fw *fw;
1905
1906 printk(KERN_INFO
1907 "sym%d: <%s> rev 0x%x on pci bus %d device %d function %d "
1908 #ifdef __sparc__
1909 "irq %s\n",
1910 #else
1911 "irq %d\n",
1912 #endif
1913 unit, dev->chip.name, dev->chip.revision_id,
1914 dev->s.bus, (dev->s.device_fn & 0xf8) >> 3,
1915 dev->s.device_fn & 7,
1916 #ifdef __sparc__
1917 __irq_itoa(dev->s.irq));
1918 #else
1919 dev->s.irq);
1920 #endif
1921
1922 /*
1923 * Get the firmware for this chip.
1924 */
1925 fw = sym_find_firmware(&dev->chip);
1926 if (!fw)
1927 goto attach_failed;
1928
1929 /*
1930 * Allocate host_data structure
1931 */
1932 if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
1933 goto attach_failed;
1934 host_data = (struct host_data *) instance->hostdata;
1935
1936 /*
1937 * Allocate immediately the host control block,
1938 * since we are only expecting to succeed. :)
1939 * We keep track in the HCB of all the resources that
1940 * are to be released on error.
1941 */
1942 #ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
1943 np = __sym_calloc_dma(dev->pdev, sizeof(*np), "HCB");
1944 if (np) {
1945 np->s.device = dev->pdev;
1946 np->bus_dmat = dev->pdev; /* Result in 1 DMA pool per HBA */
1947 }
1948 else
1949 goto attach_failed;
1950 #else
1951 np = sym_calloc_dma(sizeof(*np), "HCB");
1952 if (!np)
1953 goto attach_failed;
1954 #endif
1955 host_data->ncb = np;
1956 np->s.host = instance;
1957
1958 SYM_INIT_LOCK_HCB(np);
1959
1960 /*
1961 * Copy some useful infos to the HCB.
1962 */
1963 np->hcb_ba = vtobus(np);
1964 np->verbose = sym_driver_setup.verbose;
1965 np->s.device = dev->pdev;
1966 np->s.unit = unit;
1967 np->device_id = dev->chip.device_id;
1968 np->revision_id = dev->chip.revision_id;
1969 np->s.bus = dev->s.bus;
1970 np->s.device_fn = dev->s.device_fn;
1971 np->features = dev->chip.features;
1972 np->clock_divn = dev->chip.nr_divisor;
1973 np->maxoffs = dev->chip.offset_max;
1974 np->maxburst = dev->chip.burst_max;
1975 np->myaddr = dev->host_id;
1976
1977 /*
1978 * Edit its name.
1979 */
1980 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1981 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1982
1983 /*
1984 * Ask/tell the system about DMA addressing.
1985 */
1986 #ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
1987 if (sym_setup_bus_dma_mask(np))
1988 goto attach_failed;
1989 #endif
1990
1991 /*
1992 * Try to map the controller chip to
1993 * virtual and physical memory.
1994 */
1995 np->mmio_ba = (u32)dev->s.base;
1996 np->s.io_ws = (np->features & FE_IO256)? 256 : 128;
1997
1998 #ifndef SYM_CONF_IOMAPPED
1999 np->s.mmio_va = pci_map_mem(dev->s.base_c, np->s.io_ws);
2000 if (!np->s.mmio_va) {
2001 printf_err("%s: can't map PCI MMIO region\n", sym_name(np));
2002 goto attach_failed;
2003 }
2004 else if (sym_verbose > 1)
2005 printf_info("%s: using memory mapped IO\n", sym_name(np));
2006 #endif /* !defined SYM_CONF_IOMAPPED */
2007
2008 /*
2009 * Try to map the controller chip into iospace.
2010 */
2011 if (dev->s.io_port) {
2012 request_region(dev->s.io_port, np->s.io_ws, NAME53C8XX);
2013 np->s.io_port = dev->s.io_port;
2014 }
2015
2016 /*
2017 * Map on-chip RAM if present and supported.
2018 */
2019 if (!(np->features & FE_RAM))
2020 dev->s.base_2 = 0;
2021 if (dev->s.base_2) {
2022 np->ram_ba = (u32)dev->s.base_2;
2023 if (np->features & FE_RAM8K)
2024 np->ram_ws = 8192;
2025 else
2026 np->ram_ws = 4096;
2027 #ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
2028 np->s.ram_va = pci_map_mem(dev->s.base_2_c, np->ram_ws);
2029 if (!np->s.ram_va) {
2030 printf_err("%s: can't map PCI MEMORY region\n",
2031 sym_name(np));
2032 goto attach_failed;
2033 }
2034 #endif
2035 }
2036
2037 /*
2038 * Perform O/S independent stuff.
2039 */
2040 if (sym_hcb_attach(np, fw, nvram))
2041 goto attach_failed;
2042
2043
2044 /*
2045 * Install the interrupt handler.
2046 * If we synchonize the C code with SCRIPTS on interrupt,
2047 * we donnot want to share the INTR line at all.
2048 */
2049 if (request_irq(dev->s.irq, sym53c8xx_intr, SA_SHIRQ,
2050 NAME53C8XX, np)) {
2051 printf_err("%s: request irq %d failure\n",
2052 sym_name(np), dev->s.irq);
2053 goto attach_failed;
2054 }
2055 np->s.irq = dev->s.irq;
2056
2057 /*
2058 * After SCSI devices have been opened, we cannot
2059 * reset the bus safely, so we do it here.
2060 */
2061 SYM_LOCK_HCB(np, flags);
2062 if (sym_reset_scsi_bus(np, 0)) {
2063 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
2064 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
2065 SYM_UNLOCK_HCB(np, flags);
2066 goto attach_failed;
2067 }
2068
2069 /*
2070 * Initialize some queue headers.
2071 */
2072 sym_que_init(&np->s.wait_cmdq);
2073 sym_que_init(&np->s.busy_cmdq);
2074
2075 /*
2076 * Start the SCRIPTS.
2077 */
2078 sym_start_up (np, 1);
2079
2080 /*
2081 * Start the timer daemon
2082 */
2083 init_timer(&np->s.timer);
2084 np->s.timer.data = (unsigned long) np;
2085 np->s.timer.function = sym53c8xx_timer;
2086 np->s.lasttime=0;
2087 sym_timer (np);
2088
2089 /*
2090 * Done.
2091 */
2092 if (!first_host)
2093 first_host = instance;
2094
2095 /*
2096 * Fill Linux host instance structure
2097 * and return success.
2098 */
2099 instance->max_channel = 0;
2100 instance->this_id = np->myaddr;
2101 instance->max_id = np->maxwide ? 16 : 8;
2102 instance->max_lun = SYM_CONF_MAX_LUN;
2103 #ifndef SYM_CONF_IOMAPPED
2104 #if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,29)
2105 instance->base = (unsigned long) np->s.mmio_va;
2106 #else
2107 instance->base = (char *) np->s.mmio_va;
2108 #endif
2109 #endif
2110 instance->irq = np->s.irq;
2111 instance->unique_id = np->s.io_port;
2112 instance->io_port = np->s.io_port;
2113 instance->n_io_port = np->s.io_ws;
2114 instance->dma_channel = 0;
2115 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
2116 instance->can_queue = (SYM_CONF_MAX_START-2);
2117 instance->sg_tablesize = SYM_CONF_MAX_SG;
2118 #if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0)
2119 instance->max_cmd_len = 16;
2120 #endif
2121 instance->highmem_io = 1;
2122
2123 SYM_UNLOCK_HCB(np, flags);
2124
2125 scsi_set_device(instance, &dev->pdev->dev);
2126
2127 /*
2128 * Now let the generic SCSI driver
2129 * look for the SCSI devices on the bus ..
2130 */
2131 return 0;
2132
2133 attach_failed:
2134 if (!instance) return -1;
2135 printf_info("%s: giving up ...\n", sym_name(np));
2136 if (np)
2137 sym_free_resources(np);
2138 scsi_unregister(instance);
2139
2140 return -1;
2141 }
2142
2143
2144 /*
2145 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
2146 */
2147 #if SYM_CONF_NVRAM_SUPPORT
2148 static void __init sym_get_nvram(sym_device *devp, sym_nvram *nvp)
2149 {
2150 if (!nvp)
2151 return;
2152
2153 devp->nvram = nvp;
2154 devp->device_id = devp->chip.device_id;
2155 nvp->type = 0;
2156
2157 /*
2158 * Get access to chip IO registers
2159 */
2160 #ifdef SYM_CONF_IOMAPPED
2161 request_region(devp->s.io_port, 128, NAME53C8XX);
2162 #else
2163 devp->s.mmio_va = pci_map_mem(devp->s.base_c, 128);
2164 if (!devp->s.mmio_va)
2165 return;
2166 #endif
2167
2168 /*
2169 * Try to read SYMBIOS|TEKRAM nvram.
2170 */
2171 (void) sym_read_nvram(devp, nvp);
2172
2173 /*
2174 * Release access to chip IO registers
2175 */
2176 #ifdef SYM_CONF_IOMAPPED
2177 release_region(devp->s.io_port, 128);
2178 #else
2179 pci_unmap_mem((u_long) devp->s.mmio_va, 128ul);
2180 #endif
2181 }
2182 #endif /* SYM_CONF_NVRAM_SUPPORT */
2183
2184 /*
2185 * Driver setup from the boot command line
2186 */
2187 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
2188
2189 static struct sym_driver_setup
2190 sym_driver_safe_setup __initdata = SYM_LINUX_DRIVER_SAFE_SETUP;
2191 #ifdef MODULE
2192 char *sym53c8xx = 0; /* command line passed by insmod */
2193 MODULE_PARM(sym53c8xx, "s");
2194 #endif
2195
2196 static void __init sym53c8xx_print_driver_setup(void)
2197 {
2198 printf_info (NAME53C8XX ": setup="
2199 "mpar:%d,spar:%d,tags:%d,sync:%d,burst:%d,"
2200 "led:%d,wide:%d,diff:%d,irqm:%d, buschk:%d\n",
2201 sym_driver_setup.pci_parity,
2202 sym_driver_setup.scsi_parity,
2203 sym_driver_setup.max_tag,
2204 sym_driver_setup.min_sync,
2205 sym_driver_setup.burst_order,
2206 sym_driver_setup.scsi_led,
2207 sym_driver_setup.max_wide,
2208 sym_driver_setup.scsi_diff,
2209 sym_driver_setup.irq_mode,
2210 sym_driver_setup.scsi_bus_check);
2211 printf_info (NAME53C8XX ": setup="
2212 "hostid:%d,offs:%d,luns:%d,pcifix:%d,revprob:%d,"
2213 "verb:%d,debug:0x%x,setlle_delay:%d\n",
2214 sym_driver_setup.host_id,
2215 sym_driver_setup.max_offs,
2216 sym_driver_setup.max_lun,
2217 sym_driver_setup.pci_fix_up,
2218 sym_driver_setup.reverse_probe,
2219 sym_driver_setup.verbose,
2220 sym_driver_setup.debug,
2221 sym_driver_setup.settle_delay);
2222 #ifdef DEBUG_2_0_X
2223 MDELAY(5000);
2224 #endif
2225 };
2226
2227 #define OPT_PCI_PARITY 1
2228 #define OPT_SCSI_PARITY 2
2229 #define OPT_MAX_TAG 3
2230 #define OPT_MIN_SYNC 4
2231 #define OPT_BURST_ORDER 5
2232 #define OPT_SCSI_LED 6
2233 #define OPT_MAX_WIDE 7
2234 #define OPT_SCSI_DIFF 8
2235 #define OPT_IRQ_MODE 9
2236 #define OPT_SCSI_BUS_CHECK 10
2237 #define OPT_HOST_ID 11
2238 #define OPT_MAX_OFFS 12
2239 #define OPT_MAX_LUN 13
2240 #define OPT_PCI_FIX_UP 14
2241
2242 #define OPT_REVERSE_PROBE 15
2243 #define OPT_VERBOSE 16
2244 #define OPT_DEBUG 17
2245 #define OPT_SETTLE_DELAY 18
2246 #define OPT_USE_NVRAM 19
2247 #define OPT_EXCLUDE 20
2248 #define OPT_SAFE_SETUP 21
2249
2250 static char setup_token[] __initdata =
2251 "mpar:" "spar:"
2252 "tags:" "sync:"
2253 "burst:" "led:"
2254 "wide:" "diff:"
2255 "irqm:" "buschk:"
2256 "hostid:" "offset:"
2257 "luns:" "pcifix:"
2258 "revprob:" "verb:"
2259 "debug:" "settle:"
2260 "nvram:" "excl:"
2261 "safe:"
2262 ;
2263
2264 #ifdef MODULE
2265 #define ARG_SEP ' '
2266 #else
2267 #define ARG_SEP ','
2268 #endif
2269
2270 static int __init get_setup_token(char *p)
2271 {
2272 char *cur = setup_token;
2273 char *pc;
2274 int i = 0;
2275
2276 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
2277 ++pc;
2278 ++i;
2279 if (!strncmp(p, cur, pc - cur))
2280 return i;
2281 cur = pc;
2282 }
2283 return 0;
2284 }
2285 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
2286
2287 int __init sym53c8xx_setup(char *str)
2288 {
2289 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
2290 char *cur = str;
2291 char *pc, *pv;
2292 unsigned long val;
2293 int i, c;
2294 int xi = 0;
2295
2296 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
2297 char *pe;
2298
2299 val = 0;
2300 pv = pc;
2301 c = *++pv;
2302
2303 if (c == 'n')
2304 val = 0;
2305 else if (c == 'y')
2306 val = 1;
2307 else
2308 val = (int) simple_strtoul(pv, &pe, 0);
2309
2310 switch (get_setup_token(cur)) {
2311 case OPT_MAX_TAG:
2312 sym_driver_setup.max_tag = val;
2313 if (!(pe && *pe == '/'))
2314 break;
2315 i = 0;
2316 while (*pe && *pe != ARG_SEP &&
2317 i < sizeof(sym_driver_setup.tag_ctrl)-1) {
2318 sym_driver_setup.tag_ctrl[i++] = *pe++;
2319 }
2320 sym_driver_setup.tag_ctrl[i] = '\0';
2321 break;
2322 case OPT_SAFE_SETUP:
2323 memcpy(&sym_driver_setup, &sym_driver_safe_setup,
2324 sizeof(sym_driver_setup));
2325 break;
2326 case OPT_EXCLUDE:
2327 if (xi < 8)
2328 sym_driver_setup.excludes[xi++] = val;
2329 break;
2330
2331 #define __SIMPLE_OPTION(NAME, name) \
2332 case OPT_ ## NAME : \
2333 sym_driver_setup.name = val;\
2334 break;
2335
2336 __SIMPLE_OPTION(PCI_PARITY, pci_parity)
2337 __SIMPLE_OPTION(SCSI_PARITY, scsi_parity)
2338 __SIMPLE_OPTION(MIN_SYNC, min_sync)
2339 __SIMPLE_OPTION(BURST_ORDER, burst_order)
2340 __SIMPLE_OPTION(SCSI_LED, scsi_led)
2341 __SIMPLE_OPTION(MAX_WIDE, max_wide)
2342 __SIMPLE_OPTION(SCSI_DIFF, scsi_diff)
2343 __SIMPLE_OPTION(IRQ_MODE, irq_mode)
2344 __SIMPLE_OPTION(SCSI_BUS_CHECK, scsi_bus_check)
2345 __SIMPLE_OPTION(HOST_ID, host_id)
2346 __SIMPLE_OPTION(MAX_OFFS, max_offs)
2347 __SIMPLE_OPTION(MAX_LUN, max_lun)
2348 __SIMPLE_OPTION(PCI_FIX_UP, pci_fix_up)
2349 __SIMPLE_OPTION(REVERSE_PROBE, reverse_probe)
2350 __SIMPLE_OPTION(VERBOSE, verbose)
2351 __SIMPLE_OPTION(DEBUG, debug)
2352 __SIMPLE_OPTION(SETTLE_DELAY, settle_delay)
2353 __SIMPLE_OPTION(USE_NVRAM, use_nvram)
2354
2355 #undef __SIMPLE_OPTION
2356
2357 default:
2358 printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
2359 break;
2360 }
2361
2362 if ((cur = strchr(cur, ARG_SEP)) != NULL)
2363 ++cur;
2364 }
2365 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
2366 return 1;
2367 }
2368
2369 #if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,13)
2370 #ifndef MODULE
2371 __setup("sym53c8xx=", sym53c8xx_setup);
2372 #endif
2373 #endif
2374
2375 #ifdef SYM_CONF_PQS_PDS_SUPPORT
2376 /*
2377 * Detect all NCR PQS/PDS boards and keep track of their bus nr.
2378 *
2379 * The NCR PQS or PDS card is constructed as a DEC bridge
2380 * behind which sit a proprietary NCR memory controller and
2381 * four or two 53c875s as separate devices. In its usual mode
2382 * of operation, the 875s are slaved to the memory controller
2383 * for all transfers. We can tell if an 875 is part of a
2384 * PQS/PDS or not since if it is, it will be on the same bus
2385 * as the memory controller. To operate with the Linux
2386 * driver, the memory controller is disabled and the 875s
2387 * freed to function independently. The only wrinkle is that
2388 * the preset SCSI ID (which may be zero) must be read in from
2389 * a special configuration space register of the 875
2390 */
2391 #ifndef SYM_CONF_MAX_PQS_BUS
2392 #define SYM_CONF_MAX_PQS_BUS 16
2393 #endif
2394 static int pqs_bus[SYM_CONF_MAX_PQS_BUS] __initdata = { 0 };
2395
2396 static void __init sym_detect_pqs_pds(void)
2397 {
2398 short index;
2399 pcidev_t dev = PCIDEV_NULL;
2400
2401 for(index=0; index < SYM_CONF_MAX_PQS_BUS; index++) {
2402 u_char tmp;
2403
2404 dev = pci_find_device(0x101a, 0x0009, dev);
2405 if (dev == PCIDEV_NULL) {
2406 pqs_bus[index] = -1;
2407 break;
2408 }
2409 printf_info(NAME53C8XX ": NCR PQS/PDS memory controller detected on bus %d\n", PciBusNumber(dev));
2410 pci_read_config_byte(dev, 0x44, &tmp);
2411 /* bit 1: allow individual 875 configuration */
2412 tmp |= 0x2;
2413 pci_write_config_byte(dev, 0x44, tmp);
2414 pci_read_config_byte(dev, 0x45, &tmp);
2415 /* bit 2: drive individual 875 interrupts to the bus */
2416 tmp |= 0x4;
2417 pci_write_config_byte(dev, 0x45, tmp);
2418
2419 pqs_bus[index] = PciBusNumber(dev);
2420 }
2421 }
2422 #endif /* SYM_CONF_PQS_PDS_SUPPORT */
2423
2424 /*
2425 * Read and check the PCI configuration for any detected NCR
2426 * boards and save data for attaching after all boards have
2427 * been detected.
2428 */
2429 static int __init
2430 sym53c8xx_pci_init(Scsi_Host_Template *tpnt, pcidev_t pdev, sym_device *device)
2431 {
2432 u_short vendor_id, device_id, command, status_reg;
2433 u_char cache_line_size;
2434 u_char suggested_cache_line_size = 0;
2435 u_char pci_fix_up = SYM_SETUP_PCI_FIX_UP;
2436 u_char revision;
2437 u_int irq;
2438 u_long base, base_2, base_io;
2439 u_long base_c, base_2_c, io_port;
2440 int i;
2441 sym_chip *chip;
2442
2443 /* Choose some short name for this device */
2444 sprintf(device->s.inst_name, "sym.%d.%d.%d",
2445 PciBusNumber(pdev),
2446 (int) (PciDeviceFn(pdev) & 0xf8) >> 3,
2447 (int) (PciDeviceFn(pdev) & 7));
2448
2449 /*
2450 * Read needed minimal info from the PCI config space.
2451 */
2452 vendor_id = PciVendorId(pdev);
2453 device_id = PciDeviceId(pdev);
2454 irq = PciIrqLine(pdev);
2455
2456 i = pci_get_base_address(pdev, 0, &base_io);
2457 io_port = pci_get_base_cookie(pdev, 0);
2458
2459 base_c = pci_get_base_cookie(pdev, i);
2460 i = pci_get_base_address(pdev, i, &base);
2461
2462 base_2_c = pci_get_base_cookie(pdev, i);
2463 (void) pci_get_base_address(pdev, i, &base_2);
2464
2465 io_port &= PCI_BASE_ADDRESS_IO_MASK;
2466 base &= PCI_BASE_ADDRESS_MEM_MASK;
2467 base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
2468
2469 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
2470
2471 /*
2472 * If user excluded this chip, donnot initialize it.
2473 */
2474 if (base_io) {
2475 for (i = 0 ; i < 8 ; i++) {
2476 if (sym_driver_setup.excludes[i] == base_io)
2477 return -1;
2478 }
2479 }
2480
2481 /*
2482 * Leave here if another driver attached the chip.
2483 */
2484 if (io_port && check_region (io_port, 128)) {
2485 printf_info("%s: IO region 0x%lx[0..127] is in use\n",
2486 sym_name(device), (long) io_port);
2487 return -1;
2488 }
2489
2490 /*
2491 * Check if the chip is supported.
2492 */
2493 chip = sym_lookup_pci_chip_table(device_id, revision);
2494 if (!chip) {
2495 printf_info("%s: device not supported\n", sym_name(device));
2496 return -1;
2497 }
2498
2499 /*
2500 * Check if the chip has been assigned resources we need.
2501 */
2502 #ifdef SYM_CONF_IOMAPPED
2503 if (!io_port) {
2504 printf_info("%s: IO base address disabled.\n",
2505 sym_name(device));
2506 return -1;
2507 }
2508 #else
2509 if (!base) {
2510 printf_info("%s: MMIO base address disabled.\n",
2511 sym_name(device));
2512 return -1;
2513 }
2514 #endif
2515
2516 /*
2517 * Ignore Symbios chips controlled by various RAID controllers.
2518 * These controllers set value 0x52414944 at RAM end - 16.
2519 */
2520 #if defined(__i386__) && !defined(SYM_OPT_NO_BUS_MEMORY_MAPPING)
2521 if (base_2_c) {
2522 unsigned int ram_size, ram_val;
2523 u_long ram_ptr;
2524
2525 if (chip->features & FE_RAM8K)
2526 ram_size = 8192;
2527 else
2528 ram_size = 4096;
2529
2530 ram_ptr = pci_map_mem(base_2_c, ram_size);
2531 if (ram_ptr) {
2532 ram_val = readl_raw(ram_ptr + ram_size - 16);
2533 pci_unmap_mem(ram_ptr, ram_size);
2534 if (ram_val == 0x52414944) {
2535 printf_info("%s: not initializing, "
2536 "driven by RAID controller.\n",
2537 sym_name(device));
2538 return -1;
2539 }
2540 }
2541 }
2542 #endif /* i386 and PCI MEMORY accessible */
2543
2544 /*
2545 * Copy the chip description to our device structure,
2546 * so we can make it match the actual device and options.
2547 */
2548 bcopy(chip, &device->chip, sizeof(device->chip));
2549 device->chip.revision_id = revision;
2550
2551 if (pci_enable_device(pdev))
2552 return -1;
2553
2554 pci_set_master(pdev);
2555
2556 /*
2557 * Read additionnal info from the configuration space.
2558 */
2559 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
2560
2561 /*
2562 * If cache line size is not configured, suggest
2563 * a value for well known CPUs.
2564 */
2565 #if defined(__i386__) && !defined(MODULE)
2566 if (!cache_line_size && boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
2567 switch(boot_cpu_data.x86) {
2568 case 4: suggested_cache_line_size = 4; break;
2569 case 6: if (boot_cpu_data.x86_model > 8) break;
2570 case 5: suggested_cache_line_size = 8; break;
2571 }
2572 }
2573 #endif /* __i386__ */
2574
2575 /*
2576 * Some features are required to be enabled in order to
2577 * work around some chip problems. :) ;)
2578 * (ITEM 12 of a DEL about the 896 I haven't yet).
2579 * We must ensure the chip will use WRITE AND INVALIDATE.
2580 * The revision number limit is for now arbitrary.
2581 */
2582 if (device_id == PCI_DEVICE_ID_NCR_53C896 && revision < 0x4) {
2583 chip->features |= (FE_WRIE | FE_CLSE);
2584 pci_fix_up |= 3; /* Force appropriate PCI fix-up */
2585 }
2586
2587 #ifdef SYM_CONF_PCI_FIX_UP
2588 /*
2589 * Try to fix up PCI config according to wished features.
2590 */
2591 if ((pci_fix_up & 1) && (chip->features & FE_CLSE) &&
2592 !cache_line_size && suggested_cache_line_size) {
2593 cache_line_size = suggested_cache_line_size;
2594 pci_write_config_byte(pdev,
2595 PCI_CACHE_LINE_SIZE, cache_line_size);
2596 printf_info("%s: PCI_CACHE_LINE_SIZE set to %d.\n",
2597 sym_name(device), cache_line_size);
2598 }
2599
2600 pci_read_config_word(pdev, PCI_COMMAND, &command);
2601 if ((pci_fix_up & 2) && cache_line_size &&
2602 (chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
2603 printf_info("%s: setting PCI_COMMAND_INVALIDATE.\n",
2604 sym_name(device));
2605 command |= PCI_COMMAND_INVALIDATE;
2606 pci_write_config_word(pdev, PCI_COMMAND, command);
2607 }
2608 #endif /* SYM_CONF_PCI_FIX_UP */
2609
2610 /*
2611 * Work around for errant bit in 895A. The 66Mhz
2612 * capable bit is set erroneously. Clear this bit.
2613 * (Item 1 DEL 533)
2614 *
2615 * Make sure Config space and Features agree.
2616 *
2617 * Recall: writes are not normal to status register -
2618 * write a 1 to clear and a 0 to leave unchanged.
2619 * Can only reset bits.
2620 */
2621 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
2622 if (chip->features & FE_66MHZ) {
2623 if (!(status_reg & PCI_STATUS_66MHZ))
2624 chip->features &= ~FE_66MHZ;
2625 }
2626 else {
2627 if (status_reg & PCI_STATUS_66MHZ) {
2628 status_reg = PCI_STATUS_66MHZ;
2629 pci_write_config_word(pdev, PCI_STATUS, status_reg);
2630 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
2631 }
2632 }
2633
2634 /*
2635 * Initialise device structure with items required by sym_attach.
2636 */
2637 device->pdev = pdev;
2638 device->s.bus = PciBusNumber(pdev);
2639 device->s.device_fn = PciDeviceFn(pdev);
2640 device->s.base = base;
2641 device->s.base_2 = base_2;
2642 device->s.base_c = base_c;
2643 device->s.base_2_c = base_2_c;
2644 device->s.io_port = io_port;
2645 device->s.irq = irq;
2646 device->attach_done = 0;
2647
2648 return 0;
2649 }
2650
2651 /*
2652 * List of supported NCR chip ids
2653 */
2654 static u_short sym_chip_ids[] __initdata = {
2655 PCI_ID_SYM53C810,
2656 PCI_ID_SYM53C815,
2657 PCI_ID_SYM53C825,
2658 PCI_ID_SYM53C860,
2659 PCI_ID_SYM53C875,
2660 PCI_ID_SYM53C875_2,
2661 PCI_ID_SYM53C885,
2662 PCI_ID_SYM53C875A,
2663 PCI_ID_SYM53C895,
2664 PCI_ID_SYM53C896,
2665 PCI_ID_SYM53C895A,
2666 PCI_ID_LSI53C1510D,
2667 PCI_ID_LSI53C1010,
2668 PCI_ID_LSI53C1010_2
2669 };
2670
2671 /*
2672 * Detect all 53c8xx hosts and then attach them.
2673 *
2674 * If we are using NVRAM, once all hosts are detected, we need to
2675 * check any NVRAM for boot order in case detect and boot order
2676 * differ and attach them using the order in the NVRAM.
2677 *
2678 * If no NVRAM is found or data appears invalid attach boards in
2679 * the order they are detected.
2680 */
2681 int __init sym53c8xx_detect(Scsi_Host_Template *tpnt)
2682 {
2683 pcidev_t pcidev;
2684 int i, j, chips, hosts, count;
2685 int attach_count = 0;
2686 sym_device *devtbl, *devp;
2687 sym_nvram nvram;
2688 #if SYM_CONF_NVRAM_SUPPORT
2689 sym_nvram nvram0, *nvp;
2690 #endif
2691
2692 /*
2693 * Initialize driver general stuff.
2694 */
2695 #ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
2696 #ifdef MODULE
2697 if (sym53c8xx)
2698 sym53c8xx_setup(sym53c8xx);
2699 #endif
2700 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
2701 sym_debug_flags = sym_driver_setup.debug;
2702 #endif
2703 if (boot_verbose >= 2)
2704 sym53c8xx_print_driver_setup();
2705 #endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
2706
2707 /*
2708 * Allocate the device table since we donnot want to
2709 * overflow the kernel stack.
2710 * 1 x 4K PAGE is enough for more than 40 devices for i386.
2711 */
2712 devtbl = sym_calloc(PAGE_SIZE, "DEVTBL");
2713 if (!devtbl)
2714 return 0;
2715
2716 /*
2717 * Detect all NCR PQS/PDS memory controllers.
2718 */
2719 #ifdef SYM_CONF_PQS_PDS_SUPPORT
2720 sym_detect_pqs_pds();
2721 #endif
2722
2723 /*
2724 * Detect all 53c8xx hosts.
2725 * Save the first Symbios NVRAM content if any
2726 * for the boot order.
2727 */
2728 chips = sizeof(sym_chip_ids) / sizeof(sym_chip_ids[0]);
2729 hosts = PAGE_SIZE / sizeof(*devtbl);
2730 #if SYM_CONF_NVRAM_SUPPORT
2731 nvp = (sym_driver_setup.use_nvram & 0x1) ? &nvram0 : 0;
2732 #endif
2733 j = 0;
2734 count = 0;
2735 pcidev = PCIDEV_NULL;
2736 while (1) {
2737 char *msg = "";
2738 if (count >= hosts)
2739 break;
2740 if (j >= chips)
2741 break;
2742 i = sym_driver_setup.reverse_probe ? chips - 1 - j : j;
2743 pcidev = pci_find_device(PCI_VENDOR_ID_NCR, sym_chip_ids[i],
2744 pcidev);
2745 if (pcidev == PCIDEV_NULL) {
2746 ++j;
2747 continue;
2748 }
2749 /* This one is guaranteed by AC to do nothing :-) */
2750 if (pci_enable_device(pcidev))
2751 continue;
2752 devp = &devtbl[count];
2753 devp->host_id = SYM_SETUP_HOST_ID;
2754 devp->attach_done = 0;
2755 if (sym53c8xx_pci_init(tpnt, pcidev, devp)) {
2756 continue;
2757 }
2758 ++count;
2759 #if SYM_CONF_NVRAM_SUPPORT
2760 if (nvp) {
2761 sym_get_nvram(devp, nvp);
2762 switch(nvp->type) {
2763 case SYM_SYMBIOS_NVRAM:
2764 /*
2765 * Switch to the other nvram buffer, so that
2766 * nvram0 will contain the first Symbios
2767 * format NVRAM content with boot order.
2768 */
2769 nvp = &nvram;
2770 msg = "with Symbios NVRAM";
2771 break;
2772 case SYM_TEKRAM_NVRAM:
2773 msg = "with Tekram NVRAM";
2774 break;
2775 }
2776 }
2777 #endif
2778 #ifdef SYM_CONF_PQS_PDS_SUPPORT
2779 /*
2780 * Match the BUS number for PQS/PDS devices.
2781 * Read the SCSI ID from a special register mapped
2782 * into the configuration space of the individual
2783 * 875s. This register is set up by the PQS bios
2784 */
2785 for(i = 0; i < SYM_CONF_MAX_PQS_BUS && pqs_bus[i] != -1; i++) {
2786 u_char tmp;
2787 if (pqs_bus[i] == PciBusNumber(pcidev)) {
2788 pci_read_config_byte(pcidev, 0x84, &tmp);
2789 devp->pqs_pds = 1;
2790 devp->host_id = tmp;
2791 break;
2792 }
2793 }
2794 if (devp->pqs_pds)
2795 msg = "(NCR PQS/PDS)";
2796 #endif
2797 if (boot_verbose)
2798 printf_info("%s: 53c%s detected %s\n",
2799 sym_name(devp), devp->chip.name, msg);
2800 }
2801
2802 /*
2803 * If we have found a SYMBIOS NVRAM, use first the NVRAM boot
2804 * sequence as device boot order.
2805 * check devices in the boot record against devices detected.
2806 * attach devices if we find a match. boot table records that
2807 * do not match any detected devices will be ignored.
2808 * devices that do not match any boot table will not be attached
2809 * here but will attempt to be attached during the device table
2810 * rescan.
2811 */
2812 #if SYM_CONF_NVRAM_SUPPORT
2813 if (!nvp || nvram0.type != SYM_SYMBIOS_NVRAM)
2814 goto next;
2815 for (i = 0; i < 4; i++) {
2816 Symbios_host *h = &nvram0.data.Symbios.host[i];
2817 for (j = 0 ; j < count ; j++) {
2818 devp = &devtbl[j];
2819 if (h->device_fn != devp->s.device_fn ||
2820 h->bus_nr != devp->s.bus ||
2821 h->device_id != devp->chip.device_id)
2822 continue;
2823 if (devp->attach_done)
2824 continue;
2825 if (h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) {
2826 sym_get_nvram(devp, nvp);
2827 if (!sym_attach (tpnt, attach_count, devp))
2828 attach_count++;
2829 }
2830 else if (!(sym_driver_setup.use_nvram & 0x80))
2831 printf_info(
2832 "%s: 53c%s state OFF thus not attached\n",
2833 sym_name(devp), devp->chip.name);
2834 else
2835 continue;
2836
2837 devp->attach_done = 1;
2838 break;
2839 }
2840 }
2841 next:
2842 #endif
2843
2844 /*
2845 * Rescan device list to make sure all boards attached.
2846 * Devices without boot records will not be attached yet
2847 * so try to attach them here.
2848 */
2849 for (i= 0; i < count; i++) {
2850 devp = &devtbl[i];
2851 if (!devp->attach_done) {
2852 devp->nvram = &nvram;
2853 nvram.type = 0;
2854 #if SYM_CONF_NVRAM_SUPPORT
2855 sym_get_nvram(devp, nvp);
2856 #endif
2857 if (!sym_attach (tpnt, attach_count, devp))
2858 attach_count++;
2859 }
2860 }
2861
2862 sym_mfree(devtbl, PAGE_SIZE, "DEVTBL");
2863
2864 return attach_count;
2865 }
2866
2867
2868
2869 /*
2870 * Linux release module stuff.
2871 *
2872 * Called before unloading the module.
2873 * Detach the host.
2874 * We have to free resources and halt the NCR chip.
2875 *
2876 */
2877 static int sym_detach(hcb_p np)
2878 {
2879 printk("%s: detaching ...\n", sym_name(np));
2880
2881 /*
2882 * Try to delete the timer.
2883 * In the unlikely situation where this failed,
2884 * try to synchronize with the timer handler.
2885 */
2886 #if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 0)
2887 np->s.release_stage = 1;
2888 if (!del_timer(&np->s.timer)) {
2889 int i = 1000;
2890 int k = 1;
2891 while (1) {
2892 u_long flags;
2893 SYM_LOCK_HCB(np, flags);
2894 k = np->s.release_stage;
2895 SYM_UNLOCK_HCB(np, flags);
2896 if (k == 2 || !--i)
2897 break;
2898 MDELAY(5);
2899 }
2900 if (!i)
2901 printk("%s: failed to kill timer!\n", sym_name(np));
2902 }
2903 np->s.release_stage = 2;
2904 #else
2905 (void)del_timer_sync(&np->s.timer);
2906 #endif
2907
2908 /*
2909 * Reset NCR chip.
2910 * We should use sym_soft_reset(), but we donnot want to do
2911 * so, since we may not be safe if interrupts occur.
2912 */
2913 printk("%s: resetting chip\n", sym_name(np));
2914 OUTB (nc_istat, SRST);
2915 UDELAY (10);
2916 OUTB (nc_istat, 0);
2917
2918 /*
2919 * Free host resources
2920 */
2921 sym_free_resources(np);
2922
2923 return 1;
2924 }
2925
2926 int sym53c8xx_release(struct Scsi_Host *host)
2927 {
2928 sym_detach(((struct host_data *) host->hostdata)->ncb);
2929
2930 return 0;
2931 }
2932
2933 /*
2934 * For bigots to keep silent. :)
2935 */
2936 #ifdef MODULE_LICENSE
2937 MODULE_LICENSE("Dual BSD/GPL");
2938 #endif
2939
2940 /*
2941 * Driver host template.
2942 */
2943 static Scsi_Host_Template driver_template = {
2944 .name = "sym53c8xx",
2945 .detect = sym53c8xx_detect,
2946 .release = sym53c8xx_release,
2947 .info = sym53c8xx_info,
2948 .queuecommand = sym53c8xx_queue_command,
2949 .slave_configure = sym53c8xx_slave_configure,
2950 .eh_abort_handler = sym53c8xx_eh_abort_handler,
2951 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
2952 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
2953 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
2954 .this_id = 7,
2955 .use_clustering = DISABLE_CLUSTERING,
2956 .highmem_io = 1,
2957 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
2958 .proc_info = sym53c8xx_proc_info,
2959 #if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
2960 .proc_dir = &proc_scsi_sym53c8xx,
2961 #else
2962 .proc_name = NAME53C8XX,
2963 #endif
2964 #endif
2965 };
2966 #include "../scsi_module.c"
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