[SCSI] correct the sym2 period setting routines
[sfrench/cifs-2.6.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
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  * Copyright (c) 2003-2005  Matthew Wilcox <matthew@wil.cx>
7  *
8  * This driver is derived from the Linux sym53c8xx driver.
9  * Copyright (C) 1998-2000  Gerard Roudier
10  *
11  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 
12  * a port of the FreeBSD ncr driver to Linux-1.2.13.
13  *
14  * The original ncr driver has been written for 386bsd and FreeBSD by
15  *         Wolfgang Stanglmeier        <wolf@cologne.de>
16  *         Stefan Esser                <se@mi.Uni-Koeln.de>
17  * Copyright (C) 1994  Wolfgang Stanglmeier
18  *
19  * Other major contributions:
20  *
21  * NVRAM detection and reading.
22  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
23  *
24  *-----------------------------------------------------------------------------
25  *
26  * This program is free software; you can redistribute it and/or modify
27  * it under the terms of the GNU General Public License as published by
28  * the Free Software Foundation; either version 2 of the License, or
29  * (at your option) any later version.
30  *
31  * This program is distributed in the hope that it will be useful,
32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
34  * GNU General Public License for more details.
35  *
36  * You should have received a copy of the GNU General Public License
37  * along with this program; if not, write to the Free Software
38  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
39  */
40 #include <linux/ctype.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/module.h>
44 #include <linux/moduleparam.h>
45 #include <linux/spinlock.h>
46 #include <scsi/scsi.h>
47 #include <scsi/scsi_tcq.h>
48 #include <scsi/scsi_device.h>
49 #include <scsi/scsi_transport.h>
50
51 #include "sym_glue.h"
52 #include "sym_nvram.h"
53
54 #define NAME53C         "sym53c"
55 #define NAME53C8XX      "sym53c8xx"
56
57 /* SPARC just has to be different ... */
58 #ifdef __sparc__
59 #define IRQ_FMT "%s"
60 #define IRQ_PRM(x) __irq_itoa(x)
61 #else
62 #define IRQ_FMT "%d"
63 #define IRQ_PRM(x) (x)
64 #endif
65
66 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
67 unsigned int sym_debug_flags = 0;
68
69 static char *excl_string;
70 static char *safe_string;
71 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
72 module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
73 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
74 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
75 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
76 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
77 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
78 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
79 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
80 module_param_named(debug, sym_debug_flags, uint, 0);
81 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
82 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
83 module_param_named(excl, excl_string, charp, 0);
84 module_param_named(safe, safe_string, charp, 0);
85
86 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
87 MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
88 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
89 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
90 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
91 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
92 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
93 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
94 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
95 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
96 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
97 MODULE_PARM_DESC(nvram, "Option currently not used");
98 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
99 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
100
101 MODULE_LICENSE("GPL");
102 MODULE_VERSION(SYM_VERSION);
103 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
104 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
105
106 static void sym2_setup_params(void)
107 {
108         char *p = excl_string;
109         int xi = 0;
110
111         while (p && (xi < 8)) {
112                 char *next_p;
113                 int val = (int) simple_strtoul(p, &next_p, 0);
114                 sym_driver_setup.excludes[xi++] = val;
115                 p = next_p;
116         }
117
118         if (safe_string) {
119                 if (*safe_string == 'y') {
120                         sym_driver_setup.max_tag = 0;
121                         sym_driver_setup.burst_order = 0;
122                         sym_driver_setup.scsi_led = 0;
123                         sym_driver_setup.scsi_diff = 1;
124                         sym_driver_setup.irq_mode = 0;
125                         sym_driver_setup.scsi_bus_check = 2;
126                         sym_driver_setup.host_id = 7;
127                         sym_driver_setup.verbose = 2;
128                         sym_driver_setup.settle_delay = 10;
129                         sym_driver_setup.use_nvram = 1;
130                 } else if (*safe_string != 'n') {
131                         printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
132                                         " passed to safe option", safe_string);
133                 }
134         }
135 }
136
137 /*
138  * We used to try to deal with 64-bit BARs here, but don't any more.
139  * There are many parts of this driver which would need to be modified
140  * to handle a 64-bit base address, including scripts.  I'm uncomfortable
141  * with making those changes when I have no way of testing it, so I'm
142  * just going to disable it.
143  *
144  * Note that some machines (eg HP rx8620 and Superdome) have bus addresses
145  * below 4GB and physical addresses above 4GB.  These will continue to work.
146  */
147 static int __devinit
148 pci_get_base_address(struct pci_dev *pdev, int index, unsigned long *basep)
149 {
150         u32 tmp;
151         unsigned long base;
152 #define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
153
154         pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
155         base = tmp;
156         if ((tmp & 0x7) == PCI_BASE_ADDRESS_MEM_TYPE_64) {
157                 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
158                 if (tmp > 0)
159                         dev_err(&pdev->dev,
160                                 "BAR %d is 64-bit, disabling\n", index - 1);
161                 base = 0;
162         }
163
164         if ((base & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
165                 base &= PCI_BASE_ADDRESS_IO_MASK;
166         } else {
167                 base &= PCI_BASE_ADDRESS_MEM_MASK;
168         }
169
170         *basep = base;
171         return index;
172 #undef PCI_BAR_OFFSET
173 }
174
175 static struct scsi_transport_template *sym2_transport_template = NULL;
176
177 /*
178  *  Used by the eh thread to wait for command completion.
179  *  It is allocated on the eh thread stack.
180  */
181 struct sym_eh_wait {
182         struct completion done;
183         struct timer_list timer;
184         void (*old_done)(struct scsi_cmnd *);
185         int to_do;
186         int timed_out;
187 };
188
189 /*
190  *  Driver private area in the SCSI command structure.
191  */
192 struct sym_ucmd {               /* Override the SCSI pointer structure */
193         dma_addr_t data_mapping;
194         u_char  data_mapped;
195         struct sym_eh_wait *eh_wait;
196 };
197
198 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
199 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
200
201 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
202 {
203         int dma_dir = cmd->sc_data_direction;
204
205         switch(SYM_UCMD_PTR(cmd)->data_mapped) {
206         case 2:
207                 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
208                 break;
209         case 1:
210                 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
211                                  cmd->request_bufflen, dma_dir);
212                 break;
213         }
214         SYM_UCMD_PTR(cmd)->data_mapped = 0;
215 }
216
217 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
218 {
219         dma_addr_t mapping;
220         int dma_dir = cmd->sc_data_direction;
221
222         mapping = pci_map_single(pdev, cmd->request_buffer,
223                                  cmd->request_bufflen, dma_dir);
224         if (mapping) {
225                 SYM_UCMD_PTR(cmd)->data_mapped  = 1;
226                 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
227         }
228
229         return mapping;
230 }
231
232 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
233 {
234         int use_sg;
235         int dma_dir = cmd->sc_data_direction;
236
237         use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
238         if (use_sg > 0) {
239                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
240                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
241         }
242
243         return use_sg;
244 }
245
246 #define unmap_scsi_data(np, cmd)        \
247                 __unmap_scsi_data(np->s.device, cmd)
248 #define map_scsi_single_data(np, cmd)   \
249                 __map_scsi_single_data(np->s.device, cmd)
250 #define map_scsi_sg_data(np, cmd)       \
251                 __map_scsi_sg_data(np->s.device, cmd)
252 /*
253  *  Complete a pending CAM CCB.
254  */
255 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
256 {
257         unmap_scsi_data(np, cmd);
258         cmd->scsi_done(cmd);
259 }
260
261 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
262 {
263         sym_set_cam_status(cmd, cam_status);
264         sym_xpt_done(np, cmd);
265 }
266
267
268 /*
269  *  Tell the SCSI layer about a BUS RESET.
270  */
271 void sym_xpt_async_bus_reset(struct sym_hcb *np)
272 {
273         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
274         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
275         np->s.settle_time_valid = 1;
276         if (sym_verbose >= 2)
277                 printf_info("%s: command processing suspended for %d seconds\n",
278                             sym_name(np), sym_driver_setup.settle_delay);
279 }
280
281 /*
282  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
283  */
284 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
285 {
286         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
287 }
288
289 /*
290  *  Choose the more appropriate CAM status if 
291  *  the IO encountered an extended error.
292  */
293 static int sym_xerr_cam_status(int cam_status, int x_status)
294 {
295         if (x_status) {
296                 if      (x_status & XE_PARITY_ERR)
297                         cam_status = DID_PARITY;
298                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
299                         cam_status = DID_ERROR;
300                 else if (x_status & XE_BAD_PHASE)
301                         cam_status = DID_ERROR;
302                 else
303                         cam_status = DID_ERROR;
304         }
305         return cam_status;
306 }
307
308 /*
309  *  Build CAM result for a failed or auto-sensed IO.
310  */
311 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
312 {
313         struct scsi_cmnd *cmd = cp->cmd;
314         u_int cam_status, scsi_status, drv_status;
315
316         drv_status  = 0;
317         cam_status  = DID_OK;
318         scsi_status = cp->ssss_status;
319
320         if (cp->host_flags & HF_SENSE) {
321                 scsi_status = cp->sv_scsi_status;
322                 resid = cp->sv_resid;
323                 if (sym_verbose && cp->sv_xerr_status)
324                         sym_print_xerr(cmd, cp->sv_xerr_status);
325                 if (cp->host_status == HS_COMPLETE &&
326                     cp->ssss_status == S_GOOD &&
327                     cp->xerr_status == 0) {
328                         cam_status = sym_xerr_cam_status(DID_OK,
329                                                          cp->sv_xerr_status);
330                         drv_status = DRIVER_SENSE;
331                         /*
332                          *  Bounce back the sense data to user.
333                          */
334                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
335                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
336                               min(sizeof(cmd->sense_buffer),
337                                   (size_t)SYM_SNS_BBUF_LEN));
338 #if 0
339                         /*
340                          *  If the device reports a UNIT ATTENTION condition 
341                          *  due to a RESET condition, we should consider all 
342                          *  disconnect CCBs for this unit as aborted.
343                          */
344                         if (1) {
345                                 u_char *p;
346                                 p  = (u_char *) cmd->sense_data;
347                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
348                                         sym_clear_tasks(np, DID_ABORT,
349                                                         cp->target,cp->lun, -1);
350                         }
351 #endif
352                 } else {
353                         /*
354                          * Error return from our internal request sense.  This
355                          * is bad: we must clear the contingent allegiance
356                          * condition otherwise the device will always return
357                          * BUSY.  Use a big stick.
358                          */
359                         sym_reset_scsi_target(np, cmd->device->id);
360                         cam_status = DID_ERROR;
361                 }
362         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
363                 cam_status = DID_OK;
364         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
365                 cam_status = DID_NO_CONNECT;
366         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
367                 cam_status = DID_ERROR;
368         else {                                          /* Extended error */
369                 if (sym_verbose) {
370                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
371                                 cp->host_status, cp->ssss_status,
372                                 cp->xerr_status);
373                 }
374                 /*
375                  *  Set the most appropriate value for CAM status.
376                  */
377                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
378         }
379         cmd->resid = resid;
380         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
381 }
382
383
384 /*
385  *  Build the scatter/gather array for an I/O.
386  */
387
388 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
389 {
390         struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
391         int segment;
392
393         cp->data_len = cmd->request_bufflen;
394
395         if (cmd->request_bufflen) {
396                 dma_addr_t baddr = map_scsi_single_data(np, cmd);
397                 if (baddr) {
398                         sym_build_sge(np, data, baddr, cmd->request_bufflen);
399                         segment = 1;
400                 } else {
401                         segment = -2;
402                 }
403         } else {
404                 segment = 0;
405         }
406
407         return segment;
408 }
409
410 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
411 {
412         int segment;
413         int use_sg = (int) cmd->use_sg;
414
415         cp->data_len = 0;
416
417         if (!use_sg)
418                 segment = sym_scatter_no_sglist(np, cp, cmd);
419         else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
420                 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
421                 struct sym_tblmove *data;
422
423                 if (use_sg > SYM_CONF_MAX_SG) {
424                         unmap_scsi_data(np, cmd);
425                         return -1;
426                 }
427
428                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
429
430                 for (segment = 0; segment < use_sg; segment++) {
431                         dma_addr_t baddr = sg_dma_address(&scatter[segment]);
432                         unsigned int len = sg_dma_len(&scatter[segment]);
433
434                         sym_build_sge(np, &data[segment], baddr, len);
435                         cp->data_len += len;
436                 }
437         } else {
438                 segment = -2;
439         }
440
441         return segment;
442 }
443
444 /*
445  *  Queue a SCSI command.
446  */
447 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
448 {
449         struct scsi_device *sdev = cmd->device;
450         struct sym_tcb *tp;
451         struct sym_lcb *lp;
452         struct sym_ccb *cp;
453         int     order;
454
455         /*
456          *  Minimal checkings, so that we will not 
457          *  go outside our tables.
458          */
459         if (sdev->id == np->myaddr ||
460             sdev->id >= SYM_CONF_MAX_TARGET ||
461             sdev->lun >= SYM_CONF_MAX_LUN) {
462                 sym_xpt_done2(np, cmd, CAM_DEV_NOT_THERE);
463                 return 0;
464         }
465
466         /*
467          *  Retrieve the target descriptor.
468          */
469         tp = &np->target[sdev->id];
470
471         /*
472          *  Complete the 1st INQUIRY command with error 
473          *  condition if the device is flagged NOSCAN 
474          *  at BOOT in the NVRAM. This may speed up 
475          *  the boot and maintain coherency with BIOS 
476          *  device numbering. Clearing the flag allows 
477          *  user to rescan skipped devices later.
478          *  We also return error for devices not flagged 
479          *  for SCAN LUNS in the NVRAM since some mono-lun 
480          *  devices behave badly when asked for some non 
481          *  zero LUN. Btw, this is an absolute hack.:-)
482          */
483         if (cmd->cmnd[0] == 0x12 || cmd->cmnd[0] == 0x0) {
484                 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
485                     ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && 
486                      sdev->lun != 0)) {
487                         tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
488                         sym_xpt_done2(np, cmd, CAM_DEV_NOT_THERE);
489                         return 0;
490                 }
491         }
492
493         /*
494          *  Select tagged/untagged.
495          */
496         lp = sym_lp(tp, sdev->lun);
497         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
498
499         /*
500          *  Queue the SCSI IO.
501          */
502         cp = sym_get_ccb(np, cmd, order);
503         if (!cp)
504                 return 1;       /* Means resource shortage */
505         sym_queue_scsiio(np, cmd, cp);
506         return 0;
507 }
508
509 /*
510  *  Setup buffers and pointers that address the CDB.
511  */
512 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
513 {
514         u32     cmd_ba;
515         int     cmd_len;
516
517         /*
518          *  CDB is 16 bytes max.
519          */
520         if (cmd->cmd_len > sizeof(cp->cdb_buf)) {
521                 sym_set_cam_status(cp->cmd, CAM_REQ_INVALID);
522                 return -1;
523         }
524
525         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
526         cmd_ba  = CCB_BA (cp, cdb_buf[0]);
527         cmd_len = cmd->cmd_len;
528
529         cp->phys.cmd.addr       = cpu_to_scr(cmd_ba);
530         cp->phys.cmd.size       = cpu_to_scr(cmd_len);
531
532         return 0;
533 }
534
535 /*
536  *  Setup pointers that address the data and start the I/O.
537  */
538 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
539 {
540         int dir;
541         struct sym_tcb *tp = &np->target[cp->target];
542         struct sym_lcb *lp = sym_lp(tp, cp->lun);
543
544         /*
545          *  Build the CDB.
546          */
547         if (sym_setup_cdb(np, cmd, cp))
548                 goto out_abort;
549
550         /*
551          *  No direction means no data.
552          */
553         dir = cmd->sc_data_direction;
554         if (dir != DMA_NONE) {
555                 cp->segments = sym_scatter(np, cp, cmd);
556                 if (cp->segments < 0) {
557                         if (cp->segments == -2)
558                                 sym_set_cam_status(cmd, CAM_RESRC_UNAVAIL);
559                         else
560                                 sym_set_cam_status(cmd, CAM_REQ_TOO_BIG);
561                         goto out_abort;
562                 }
563         } else {
564                 cp->data_len = 0;
565                 cp->segments = 0;
566         }
567
568         /*
569          *  Set data pointers.
570          */
571         sym_setup_data_pointers(np, cp, dir);
572
573         /*
574          *  When `#ifed 1', the code below makes the driver 
575          *  panic on the first attempt to write to a SCSI device.
576          *  It is the first test we want to do after a driver 
577          *  change that does not seem obviously safe. :)
578          */
579 #if 0
580         switch (cp->cdb_buf[0]) {
581         case 0x0A: case 0x2A: case 0xAA:
582                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
583                 break;
584         default:
585                 break;
586         }
587 #endif
588
589         /*
590          *      activate this job.
591          */
592         if (lp)
593                 sym_start_next_ccbs(np, lp, 2);
594         else
595                 sym_put_start_queue(np, cp);
596         return 0;
597
598 out_abort:
599         sym_free_ccb(np, cp);
600         sym_xpt_done(np, cmd);
601         return 0;
602 }
603
604
605 /*
606  *  timer daemon.
607  *
608  *  Misused to keep the driver running when
609  *  interrupts are not configured correctly.
610  */
611 static void sym_timer(struct sym_hcb *np)
612 {
613         unsigned long thistime = jiffies;
614
615         /*
616          *  Restart the timer.
617          */
618         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
619         add_timer(&np->s.timer);
620
621         /*
622          *  If we are resetting the ncr, wait for settle_time before 
623          *  clearing it. Then command processing will be resumed.
624          */
625         if (np->s.settle_time_valid) {
626                 if (time_before_eq(np->s.settle_time, thistime)) {
627                         if (sym_verbose >= 2 )
628                                 printk("%s: command processing resumed\n",
629                                        sym_name(np));
630                         np->s.settle_time_valid = 0;
631                 }
632                 return;
633         }
634
635         /*
636          *      Nothing to do for now, but that may come.
637          */
638         if (np->s.lasttime + 4*HZ < thistime) {
639                 np->s.lasttime = thistime;
640         }
641
642 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
643         /*
644          *  Some way-broken PCI bridges may lead to 
645          *  completions being lost when the clearing 
646          *  of the INTFLY flag by the CPU occurs 
647          *  concurrently with the chip raising this flag.
648          *  If this ever happen, lost completions will 
649          * be reaped here.
650          */
651         sym_wakeup_done(np);
652 #endif
653 }
654
655
656 /*
657  *  PCI BUS error handler.
658  */
659 void sym_log_bus_error(struct sym_hcb *np)
660 {
661         u_short pci_sts;
662         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
663         if (pci_sts & 0xf900) {
664                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
665                 printf("%s: PCI STATUS = 0x%04x\n",
666                         sym_name(np), pci_sts & 0xf900);
667         }
668 }
669
670 /*
671  * queuecommand method.  Entered with the host adapter lock held and
672  * interrupts disabled.
673  */
674 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
675                                         void (*done)(struct scsi_cmnd *))
676 {
677         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
678         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
679         int sts = 0;
680
681         cmd->scsi_done     = done;
682         memset(ucp, 0, sizeof(*ucp));
683
684         /*
685          *  Shorten our settle_time if needed for 
686          *  this command not to time out.
687          */
688         if (np->s.settle_time_valid && cmd->timeout_per_command) {
689                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
690                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
691                 if (time_after(np->s.settle_time, tlimit)) {
692                         np->s.settle_time = tlimit;
693                 }
694         }
695
696         if (np->s.settle_time_valid)
697                 return SCSI_MLQUEUE_HOST_BUSY;
698
699         sts = sym_queue_command(np, cmd);
700         if (sts)
701                 return SCSI_MLQUEUE_HOST_BUSY;
702         return 0;
703 }
704
705 /*
706  *  Linux entry point of the interrupt handler.
707  */
708 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
709 {
710         unsigned long flags;
711         struct sym_hcb *np = (struct sym_hcb *)dev_id;
712
713         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
714
715         spin_lock_irqsave(np->s.host->host_lock, flags);
716         sym_interrupt(np);
717         spin_unlock_irqrestore(np->s.host->host_lock, flags);
718
719         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
720
721         return IRQ_HANDLED;
722 }
723
724 /*
725  *  Linux entry point of the timer handler
726  */
727 static void sym53c8xx_timer(unsigned long npref)
728 {
729         struct sym_hcb *np = (struct sym_hcb *)npref;
730         unsigned long flags;
731
732         spin_lock_irqsave(np->s.host->host_lock, flags);
733         sym_timer(np);
734         spin_unlock_irqrestore(np->s.host->host_lock, flags);
735 }
736
737
738 /*
739  *  What the eh thread wants us to perform.
740  */
741 #define SYM_EH_ABORT            0
742 #define SYM_EH_DEVICE_RESET     1
743 #define SYM_EH_BUS_RESET        2
744 #define SYM_EH_HOST_RESET       3
745
746 /*
747  *  What we will do regarding the involved SCSI command.
748  */
749 #define SYM_EH_DO_IGNORE        0
750 #define SYM_EH_DO_COMPLETE      1
751 #define SYM_EH_DO_WAIT          2
752
753 /*
754  *  Our general completion handler.
755  */
756 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
757 {
758         struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
759         if (!ep)
760                 return;
761
762         /* Try to avoid a race here (not 100% safe) */
763         if (!timed_out) {
764                 ep->timed_out = 0;
765                 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
766                         return;
767         }
768
769         /* Revert everything */
770         SYM_UCMD_PTR(cmd)->eh_wait = NULL;
771         cmd->scsi_done = ep->old_done;
772
773         /* Wake up the eh thread if it wants to sleep */
774         if (ep->to_do == SYM_EH_DO_WAIT)
775                 complete(&ep->done);
776 }
777
778 /*
779  *  scsi_done() alias when error recovery is in progress. 
780  */
781 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
782
783 /*
784  *  Some timeout handler to avoid waiting too long.
785  */
786 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
787
788 /*
789  *  Generic method for our eh processing.
790  *  The 'op' argument tells what we have to do.
791  */
792 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
793 {
794         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
795         SYM_QUEHEAD *qp;
796         int to_do = SYM_EH_DO_IGNORE;
797         int sts = -1;
798         struct sym_eh_wait eh, *ep = &eh;
799
800         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
801
802         /* This one is queued in some place -> to wait for completion */
803         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
804                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
805                 if (cp->cmd == cmd) {
806                         to_do = SYM_EH_DO_WAIT;
807                         goto prepare;
808                 }
809         }
810
811 prepare:
812         /* Prepare stuff to either ignore, complete or wait for completion */
813         switch(to_do) {
814         default:
815         case SYM_EH_DO_IGNORE:
816                 break;
817         case SYM_EH_DO_WAIT:
818                 init_completion(&ep->done);
819                 /* fall through */
820         case SYM_EH_DO_COMPLETE:
821                 ep->old_done = cmd->scsi_done;
822                 cmd->scsi_done = sym_eh_done;
823                 SYM_UCMD_PTR(cmd)->eh_wait = ep;
824         }
825
826         /* Try to proceed the operation we have been asked for */
827         sts = -1;
828         switch(op) {
829         case SYM_EH_ABORT:
830                 sts = sym_abort_scsiio(np, cmd, 1);
831                 break;
832         case SYM_EH_DEVICE_RESET:
833                 sts = sym_reset_scsi_target(np, cmd->device->id);
834                 break;
835         case SYM_EH_BUS_RESET:
836                 sym_reset_scsi_bus(np, 1);
837                 sts = 0;
838                 break;
839         case SYM_EH_HOST_RESET:
840                 sym_reset_scsi_bus(np, 0);
841                 sym_start_up (np, 1);
842                 sts = 0;
843                 break;
844         default:
845                 break;
846         }
847
848         /* On error, restore everything and cross fingers :) */
849         if (sts) {
850                 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
851                 cmd->scsi_done = ep->old_done;
852                 to_do = SYM_EH_DO_IGNORE;
853         }
854
855         ep->to_do = to_do;
856         /* Complete the command with locks held as required by the driver */
857         if (to_do == SYM_EH_DO_COMPLETE)
858                 sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
859
860         /* Wait for completion with locks released, as required by kernel */
861         if (to_do == SYM_EH_DO_WAIT) {
862                 init_timer(&ep->timer);
863                 ep->timer.expires = jiffies + (5*HZ);
864                 ep->timer.function = sym_eh_timeout;
865                 ep->timer.data = (u_long)cmd;
866                 ep->timed_out = 1;      /* Be pessimistic for once :) */
867                 add_timer(&ep->timer);
868                 spin_unlock_irq(np->s.host->host_lock);
869                 wait_for_completion(&ep->done);
870                 spin_lock_irq(np->s.host->host_lock);
871                 if (ep->timed_out)
872                         sts = -2;
873         }
874         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
875                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
876         return sts ? SCSI_FAILED : SCSI_SUCCESS;
877 }
878
879
880 /*
881  * Error handlers called from the eh thread (one thread per HBA).
882  */
883 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
884 {
885         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
886 }
887
888 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
889 {
890         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
891 }
892
893 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
894 {
895         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
896 }
897
898 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
899 {
900         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
901 }
902
903 /*
904  *  Tune device queuing depth, according to various limits.
905  */
906 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
907 {
908         struct sym_lcb *lp = sym_lp(tp, lun);
909         u_short oldtags;
910
911         if (!lp)
912                 return;
913
914         oldtags = lp->s.reqtags;
915
916         if (reqtags > lp->s.scdev_depth)
917                 reqtags = lp->s.scdev_depth;
918
919         lp->started_limit = reqtags ? reqtags : 2;
920         lp->started_max   = 1;
921         lp->s.reqtags     = reqtags;
922
923         if (reqtags != oldtags) {
924                 dev_info(&tp->sdev->sdev_target->dev,
925                          "tagged command queuing %s, command queue depth %d.\n",
926                           lp->s.reqtags ? "enabled" : "disabled",
927                           lp->started_limit);
928         }
929 }
930
931 /*
932  *  Linux select queue depths function
933  */
934 #define DEF_DEPTH       (sym_driver_setup.max_tag)
935 #define ALL_TARGETS     -2
936 #define NO_TARGET       -1
937 #define ALL_LUNS        -2
938 #define NO_LUN          -1
939
940 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
941 {
942         int c, h, t, u, v;
943         char *p = sym_driver_setup.tag_ctrl;
944         char *ep;
945
946         h = -1;
947         t = NO_TARGET;
948         u = NO_LUN;
949         while ((c = *p++) != 0) {
950                 v = simple_strtoul(p, &ep, 0);
951                 switch(c) {
952                 case '/':
953                         ++h;
954                         t = ALL_TARGETS;
955                         u = ALL_LUNS;
956                         break;
957                 case 't':
958                         if (t != target)
959                                 t = (target == v) ? v : NO_TARGET;
960                         u = ALL_LUNS;
961                         break;
962                 case 'u':
963                         if (u != lun)
964                                 u = (lun == v) ? v : NO_LUN;
965                         break;
966                 case 'q':
967                         if (h == np->s.unit &&
968                                 (t == ALL_TARGETS || t == target) &&
969                                 (u == ALL_LUNS    || u == lun))
970                                 return v;
971                         break;
972                 case '-':
973                         t = ALL_TARGETS;
974                         u = ALL_LUNS;
975                         break;
976                 default:
977                         break;
978                 }
979                 p = ep;
980         }
981         return DEF_DEPTH;
982 }
983
984 static int sym53c8xx_slave_alloc(struct scsi_device *device)
985 {
986         struct sym_hcb *np = sym_get_hcb(device->host);
987         struct sym_tcb *tp = &np->target[device->id];
988         if (!tp->sdev)
989                 tp->sdev = device;
990
991         return 0;
992 }
993
994 static void sym53c8xx_slave_destroy(struct scsi_device *device)
995 {
996         struct sym_hcb *np = sym_get_hcb(device->host);
997         struct sym_tcb *tp = &np->target[device->id];
998         if (tp->sdev == device)
999                 tp->sdev = NULL;
1000 }
1001
1002 /*
1003  * Linux entry point for device queue sizing.
1004  */
1005 static int sym53c8xx_slave_configure(struct scsi_device *device)
1006 {
1007         struct sym_hcb *np = sym_get_hcb(device->host);
1008         struct sym_tcb *tp = &np->target[device->id];
1009         struct sym_lcb *lp;
1010         int reqtags, depth_to_use;
1011
1012         /*
1013          *  Allocate the LCB if not yet.
1014          *  If it fail, we may well be in the sh*t. :)
1015          */
1016         lp = sym_alloc_lcb(np, device->id, device->lun);
1017         if (!lp)
1018                 return -ENOMEM;
1019
1020         /*
1021          *  Get user flags.
1022          */
1023         lp->curr_flags = lp->user_flags;
1024
1025         /*
1026          *  Select queue depth from driver setup.
1027          *  Donnot use more than configured by user.
1028          *  Use at least 2.
1029          *  Donnot use more than our maximum.
1030          */
1031         reqtags = device_queue_depth(np, device->id, device->lun);
1032         if (reqtags > tp->usrtags)
1033                 reqtags = tp->usrtags;
1034         if (!device->tagged_supported)
1035                 reqtags = 0;
1036 #if 1 /* Avoid to locally queue commands for no good reasons */
1037         if (reqtags > SYM_CONF_MAX_TAG)
1038                 reqtags = SYM_CONF_MAX_TAG;
1039         depth_to_use = (reqtags ? reqtags : 2);
1040 #else
1041         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1042 #endif
1043         scsi_adjust_queue_depth(device,
1044                                 (device->tagged_supported ?
1045                                  MSG_SIMPLE_TAG : 0),
1046                                 depth_to_use);
1047         lp->s.scdev_depth = depth_to_use;
1048         sym_tune_dev_queuing(tp, device->lun, reqtags);
1049
1050         if (!spi_initial_dv(device->sdev_target))
1051                 spi_dv_device(device);
1052
1053         return 0;
1054 }
1055
1056 /*
1057  *  Linux entry point for info() function
1058  */
1059 static const char *sym53c8xx_info (struct Scsi_Host *host)
1060 {
1061         return SYM_DRIVER_NAME;
1062 }
1063
1064
1065 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1066 /*
1067  *  Proc file system stuff
1068  *
1069  *  A read operation returns adapter information.
1070  *  A write operation is a control command.
1071  *  The string is parsed in the driver code and the command is passed 
1072  *  to the sym_usercmd() function.
1073  */
1074
1075 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1076
1077 struct  sym_usrcmd {
1078         u_long  target;
1079         u_long  lun;
1080         u_long  data;
1081         u_long  cmd;
1082 };
1083
1084 #define UC_SETSYNC      10
1085 #define UC_SETTAGS      11
1086 #define UC_SETDEBUG     12
1087 #define UC_SETWIDE      14
1088 #define UC_SETFLAG      15
1089 #define UC_SETVERBOSE   17
1090 #define UC_RESETDEV     18
1091 #define UC_CLEARDEV     19
1092
1093 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1094 {
1095         struct sym_tcb *tp;
1096         int t, l;
1097
1098         switch (uc->cmd) {
1099         case 0: return;
1100
1101 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1102         case UC_SETDEBUG:
1103                 sym_debug_flags = uc->data;
1104                 break;
1105 #endif
1106         case UC_SETVERBOSE:
1107                 np->verbose = uc->data;
1108                 break;
1109         default:
1110                 /*
1111                  * We assume that other commands apply to targets.
1112                  * This should always be the case and avoid the below 
1113                  * 4 lines to be repeated 6 times.
1114                  */
1115                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1116                         if (!((uc->target >> t) & 1))
1117                                 continue;
1118                         tp = &np->target[t];
1119
1120                         switch (uc->cmd) {
1121
1122                         case UC_SETSYNC:
1123                                 if (!uc->data || uc->data >= 255) {
1124                                         tp->tgoal.iu = tp->tgoal.dt =
1125                                                 tp->tgoal.qas = 0;
1126                                         tp->tgoal.offset = 0;
1127                                 } else if (uc->data <= 9 && np->minsync_dt) {
1128                                         if (uc->data < np->minsync_dt)
1129                                                 uc->data = np->minsync_dt;
1130                                         tp->tgoal.iu = tp->tgoal.dt =
1131                                                 tp->tgoal.qas = 1;
1132                                         tp->tgoal.width = 1;
1133                                         tp->tgoal.period = uc->data;
1134                                         tp->tgoal.offset = np->maxoffs_dt;
1135                                 } else {
1136                                         if (uc->data < np->minsync)
1137                                                 uc->data = np->minsync;
1138                                         tp->tgoal.iu = tp->tgoal.dt =
1139                                                 tp->tgoal.qas = 0;
1140                                         tp->tgoal.period = uc->data;
1141                                         tp->tgoal.offset = np->maxoffs;
1142                                 }
1143                                 tp->tgoal.check_nego = 1;
1144                                 break;
1145                         case UC_SETWIDE:
1146                                 tp->tgoal.width = uc->data ? 1 : 0;
1147                                 tp->tgoal.check_nego = 1;
1148                                 break;
1149                         case UC_SETTAGS:
1150                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1151                                         sym_tune_dev_queuing(tp, l, uc->data);
1152                                 break;
1153                         case UC_RESETDEV:
1154                                 tp->to_reset = 1;
1155                                 np->istat_sem = SEM;
1156                                 OUTB(np, nc_istat, SIGP|SEM);
1157                                 break;
1158                         case UC_CLEARDEV:
1159                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1160                                         struct sym_lcb *lp = sym_lp(tp, l);
1161                                         if (lp) lp->to_clear = 1;
1162                                 }
1163                                 np->istat_sem = SEM;
1164                                 OUTB(np, nc_istat, SIGP|SEM);
1165                                 break;
1166                         case UC_SETFLAG:
1167                                 tp->usrflags = uc->data;
1168                                 break;
1169                         }
1170                 }
1171                 break;
1172         }
1173 }
1174
1175 static int skip_spaces(char *ptr, int len)
1176 {
1177         int cnt, c;
1178
1179         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1180
1181         return (len - cnt);
1182 }
1183
1184 static int get_int_arg(char *ptr, int len, u_long *pv)
1185 {
1186         char *end;
1187
1188         *pv = simple_strtoul(ptr, &end, 10);
1189         return (end - ptr);
1190 }
1191
1192 static int is_keyword(char *ptr, int len, char *verb)
1193 {
1194         int verb_len = strlen(verb);
1195
1196         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1197                 return verb_len;
1198         else
1199                 return 0;
1200 }
1201
1202 #define SKIP_SPACES(ptr, len)                                           \
1203         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1204                 return -EINVAL;                                         \
1205         ptr += arg_len; len -= arg_len;
1206
1207 #define GET_INT_ARG(ptr, len, v)                                        \
1208         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1209                 return -EINVAL;                                         \
1210         ptr += arg_len; len -= arg_len;
1211
1212
1213 /*
1214  * Parse a control command
1215  */
1216
1217 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1218 {
1219         char *ptr       = buffer;
1220         int len         = length;
1221         struct sym_usrcmd cmd, *uc = &cmd;
1222         int             arg_len;
1223         u_long          target;
1224
1225         memset(uc, 0, sizeof(*uc));
1226
1227         if (len > 0 && ptr[len-1] == '\n')
1228                 --len;
1229
1230         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1231                 uc->cmd = UC_SETSYNC;
1232         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1233                 uc->cmd = UC_SETTAGS;
1234         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1235                 uc->cmd = UC_SETVERBOSE;
1236         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1237                 uc->cmd = UC_SETWIDE;
1238 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1239         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1240                 uc->cmd = UC_SETDEBUG;
1241 #endif
1242         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1243                 uc->cmd = UC_SETFLAG;
1244         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1245                 uc->cmd = UC_RESETDEV;
1246         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1247                 uc->cmd = UC_CLEARDEV;
1248         else
1249                 arg_len = 0;
1250
1251 #ifdef DEBUG_PROC_INFO
1252 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1253 #endif
1254
1255         if (!arg_len)
1256                 return -EINVAL;
1257         ptr += arg_len; len -= arg_len;
1258
1259         switch(uc->cmd) {
1260         case UC_SETSYNC:
1261         case UC_SETTAGS:
1262         case UC_SETWIDE:
1263         case UC_SETFLAG:
1264         case UC_RESETDEV:
1265         case UC_CLEARDEV:
1266                 SKIP_SPACES(ptr, len);
1267                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1268                         ptr += arg_len; len -= arg_len;
1269                         uc->target = ~0;
1270                 } else {
1271                         GET_INT_ARG(ptr, len, target);
1272                         uc->target = (1<<target);
1273 #ifdef DEBUG_PROC_INFO
1274 printk("sym_user_command: target=%ld\n", target);
1275 #endif
1276                 }
1277                 break;
1278         }
1279
1280         switch(uc->cmd) {
1281         case UC_SETVERBOSE:
1282         case UC_SETSYNC:
1283         case UC_SETTAGS:
1284         case UC_SETWIDE:
1285                 SKIP_SPACES(ptr, len);
1286                 GET_INT_ARG(ptr, len, uc->data);
1287 #ifdef DEBUG_PROC_INFO
1288 printk("sym_user_command: data=%ld\n", uc->data);
1289 #endif
1290                 break;
1291 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1292         case UC_SETDEBUG:
1293                 while (len > 0) {
1294                         SKIP_SPACES(ptr, len);
1295                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1296                                 uc->data |= DEBUG_ALLOC;
1297                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1298                                 uc->data |= DEBUG_PHASE;
1299                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1300                                 uc->data |= DEBUG_QUEUE;
1301                         else if ((arg_len = is_keyword(ptr, len, "result")))
1302                                 uc->data |= DEBUG_RESULT;
1303                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1304                                 uc->data |= DEBUG_SCATTER;
1305                         else if ((arg_len = is_keyword(ptr, len, "script")))
1306                                 uc->data |= DEBUG_SCRIPT;
1307                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1308                                 uc->data |= DEBUG_TINY;
1309                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1310                                 uc->data |= DEBUG_TIMING;
1311                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1312                                 uc->data |= DEBUG_NEGO;
1313                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1314                                 uc->data |= DEBUG_TAGS;
1315                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1316                                 uc->data |= DEBUG_POINTER;
1317                         else
1318                                 return -EINVAL;
1319                         ptr += arg_len; len -= arg_len;
1320                 }
1321 #ifdef DEBUG_PROC_INFO
1322 printk("sym_user_command: data=%ld\n", uc->data);
1323 #endif
1324                 break;
1325 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1326         case UC_SETFLAG:
1327                 while (len > 0) {
1328                         SKIP_SPACES(ptr, len);
1329                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1330                                 uc->data &= ~SYM_DISC_ENABLED;
1331                         else
1332                                 return -EINVAL;
1333                         ptr += arg_len; len -= arg_len;
1334                 }
1335                 break;
1336         default:
1337                 break;
1338         }
1339
1340         if (len)
1341                 return -EINVAL;
1342         else {
1343                 unsigned long flags;
1344
1345                 spin_lock_irqsave(np->s.host->host_lock, flags);
1346                 sym_exec_user_command (np, uc);
1347                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1348         }
1349         return length;
1350 }
1351
1352 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1353
1354
1355 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1356 /*
1357  *  Informations through the proc file system.
1358  */
1359 struct info_str {
1360         char *buffer;
1361         int length;
1362         int offset;
1363         int pos;
1364 };
1365
1366 static void copy_mem_info(struct info_str *info, char *data, int len)
1367 {
1368         if (info->pos + len > info->length)
1369                 len = info->length - info->pos;
1370
1371         if (info->pos + len < info->offset) {
1372                 info->pos += len;
1373                 return;
1374         }
1375         if (info->pos < info->offset) {
1376                 data += (info->offset - info->pos);
1377                 len  -= (info->offset - info->pos);
1378         }
1379
1380         if (len > 0) {
1381                 memcpy(info->buffer + info->pos, data, len);
1382                 info->pos += len;
1383         }
1384 }
1385
1386 static int copy_info(struct info_str *info, char *fmt, ...)
1387 {
1388         va_list args;
1389         char buf[81];
1390         int len;
1391
1392         va_start(args, fmt);
1393         len = vsprintf(buf, fmt, args);
1394         va_end(args);
1395
1396         copy_mem_info(info, buf, len);
1397         return len;
1398 }
1399
1400 /*
1401  *  Copy formatted information into the input buffer.
1402  */
1403 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1404 {
1405         struct info_str info;
1406
1407         info.buffer     = ptr;
1408         info.length     = len;
1409         info.offset     = offset;
1410         info.pos        = 0;
1411
1412         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1413                          "revision id 0x%x\n",
1414                          np->s.chip_name, np->device_id, np->revision_id);
1415         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1416                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1417         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1418                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1419                          np->maxwide ? "Wide" : "Narrow",
1420                          np->minsync_dt ? ", DT capable" : "");
1421
1422         copy_info(&info, "Max. started commands %d, "
1423                          "max. commands per LUN %d\n",
1424                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1425
1426         return info.pos > info.offset? info.pos - info.offset : 0;
1427 }
1428 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1429
1430 /*
1431  *  Entry point of the scsi proc fs of the driver.
1432  *  - func = 0 means read  (returns adapter infos)
1433  *  - func = 1 means write (not yet merget from sym53c8xx)
1434  */
1435 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1436                         char **start, off_t offset, int length, int func)
1437 {
1438         struct sym_hcb *np = sym_get_hcb(host);
1439         int retv;
1440
1441         if (func) {
1442 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1443                 retv = sym_user_command(np, buffer, length);
1444 #else
1445                 retv = -EINVAL;
1446 #endif
1447         } else {
1448                 if (start)
1449                         *start = buffer;
1450 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1451                 retv = sym_host_info(np, buffer, offset, length);
1452 #else
1453                 retv = -EINVAL;
1454 #endif
1455         }
1456
1457         return retv;
1458 }
1459 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1460
1461 /*
1462  *      Free controller resources.
1463  */
1464 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1465 {
1466         /*
1467          *  Free O/S specific resources.
1468          */
1469         if (np->s.irq)
1470                 free_irq(np->s.irq, np);
1471         if (np->s.ioaddr)
1472                 pci_iounmap(pdev, np->s.ioaddr);
1473         if (np->s.ramaddr)
1474                 pci_iounmap(pdev, np->s.ramaddr);
1475         /*
1476          *  Free O/S independent resources.
1477          */
1478         sym_hcb_free(np);
1479
1480         sym_mfree_dma(np, sizeof(*np), "HCB");
1481 }
1482
1483 /*
1484  *  Ask/tell the system about DMA addressing.
1485  */
1486 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1487 {
1488 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1489 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1490 #define DMA_DAC_MASK    0x000000ffffffffffULL /* 40-bit */
1491 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1492 #define DMA_DAC_MASK    DMA_64BIT_MASK
1493 #endif
1494         if ((np->features & FE_DAC) &&
1495                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1496                 np->use_dac = 1;
1497                 return 0;
1498         }
1499 #endif
1500
1501         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1502                 return 0;
1503
1504         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1505         return -1;
1506 }
1507
1508 /*
1509  *  Host attach and initialisations.
1510  *
1511  *  Allocate host data and ncb structure.
1512  *  Remap MMIO region.
1513  *  Do chip initialization.
1514  *  If all is OK, install interrupt handling and
1515  *  start the timer daemon.
1516  */
1517 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1518                 int unit, struct sym_device *dev)
1519 {
1520         struct host_data *host_data;
1521         struct sym_hcb *np = NULL;
1522         struct Scsi_Host *instance = NULL;
1523         struct pci_dev *pdev = dev->pdev;
1524         unsigned long flags;
1525         struct sym_fw *fw;
1526
1527         printk(KERN_INFO
1528                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1529                 unit, dev->chip.name, dev->chip.revision_id,
1530                 pci_name(pdev), IRQ_PRM(pdev->irq));
1531
1532         /*
1533          *  Get the firmware for this chip.
1534          */
1535         fw = sym_find_firmware(&dev->chip);
1536         if (!fw)
1537                 goto attach_failed;
1538
1539         /*
1540          *      Allocate host_data structure
1541          */
1542         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1543         if (!instance)
1544                 goto attach_failed;
1545         host_data = (struct host_data *) instance->hostdata;
1546
1547         /*
1548          *  Allocate immediately the host control block, 
1549          *  since we are only expecting to succeed. :)
1550          *  We keep track in the HCB of all the resources that 
1551          *  are to be released on error.
1552          */
1553         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1554         if (!np)
1555                 goto attach_failed;
1556         np->s.device = pdev;
1557         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1558         host_data->ncb = np;
1559         np->s.host = instance;
1560
1561         pci_set_drvdata(pdev, np);
1562
1563         /*
1564          *  Copy some useful infos to the HCB.
1565          */
1566         np->hcb_ba      = vtobus(np);
1567         np->verbose     = sym_driver_setup.verbose;
1568         np->s.device    = pdev;
1569         np->s.unit      = unit;
1570         np->device_id   = dev->chip.device_id;
1571         np->revision_id = dev->chip.revision_id;
1572         np->features    = dev->chip.features;
1573         np->clock_divn  = dev->chip.nr_divisor;
1574         np->maxoffs     = dev->chip.offset_max;
1575         np->maxburst    = dev->chip.burst_max;
1576         np->myaddr      = dev->host_id;
1577
1578         /*
1579          *  Edit its name.
1580          */
1581         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1582         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1583
1584         if (sym_setup_bus_dma_mask(np))
1585                 goto attach_failed;
1586
1587         /*
1588          *  Try to map the controller chip to
1589          *  virtual and physical memory.
1590          */
1591         np->mmio_ba = (u32)dev->mmio_base;
1592         np->s.ioaddr    = dev->s.ioaddr;
1593         np->s.ramaddr   = dev->s.ramaddr;
1594         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1595
1596         /*
1597          *  Map on-chip RAM if present and supported.
1598          */
1599         if (!(np->features & FE_RAM))
1600                 dev->ram_base = 0;
1601         if (dev->ram_base) {
1602                 np->ram_ba = (u32)dev->ram_base;
1603                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1604         }
1605
1606         if (sym_hcb_attach(instance, fw, dev->nvram))
1607                 goto attach_failed;
1608
1609         /*
1610          *  Install the interrupt handler.
1611          *  If we synchonize the C code with SCRIPTS on interrupt, 
1612          *  we do not want to share the INTR line at all.
1613          */
1614         if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1615                 printf_err("%s: request irq %d failure\n",
1616                         sym_name(np), pdev->irq);
1617                 goto attach_failed;
1618         }
1619         np->s.irq = pdev->irq;
1620
1621         /*
1622          *  After SCSI devices have been opened, we cannot
1623          *  reset the bus safely, so we do it here.
1624          */
1625         spin_lock_irqsave(instance->host_lock, flags);
1626         if (sym_reset_scsi_bus(np, 0))
1627                 goto reset_failed;
1628
1629         /*
1630          *  Start the SCRIPTS.
1631          */
1632         sym_start_up (np, 1);
1633
1634         /*
1635          *  Start the timer daemon
1636          */
1637         init_timer(&np->s.timer);
1638         np->s.timer.data     = (unsigned long) np;
1639         np->s.timer.function = sym53c8xx_timer;
1640         np->s.lasttime=0;
1641         sym_timer (np);
1642
1643         /*
1644          *  Fill Linux host instance structure
1645          *  and return success.
1646          */
1647         instance->max_channel   = 0;
1648         instance->this_id       = np->myaddr;
1649         instance->max_id        = np->maxwide ? 16 : 8;
1650         instance->max_lun       = SYM_CONF_MAX_LUN;
1651         instance->unique_id     = pci_resource_start(pdev, 0);
1652         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1653         instance->can_queue     = (SYM_CONF_MAX_START-2);
1654         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1655         instance->max_cmd_len   = 16;
1656         BUG_ON(sym2_transport_template == NULL);
1657         instance->transportt    = sym2_transport_template;
1658
1659         spin_unlock_irqrestore(instance->host_lock, flags);
1660
1661         return instance;
1662
1663  reset_failed:
1664         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1665                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1666         spin_unlock_irqrestore(instance->host_lock, flags);
1667  attach_failed:
1668         if (!instance)
1669                 return NULL;
1670         printf_info("%s: giving up ...\n", sym_name(np));
1671         if (np)
1672                 sym_free_resources(np, pdev);
1673         scsi_host_put(instance);
1674
1675         return NULL;
1676  }
1677
1678
1679 /*
1680  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1681  */
1682 #if SYM_CONF_NVRAM_SUPPORT
1683 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1684 {
1685         devp->nvram = nvp;
1686         devp->device_id = devp->chip.device_id;
1687         nvp->type = 0;
1688
1689         sym_read_nvram(devp, nvp);
1690 }
1691 #else
1692 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1693 {
1694 }
1695 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1696
1697 static int __devinit sym_check_supported(struct sym_device *device)
1698 {
1699         struct sym_chip *chip;
1700         struct pci_dev *pdev = device->pdev;
1701         u_char revision;
1702         unsigned long io_port = pci_resource_start(pdev, 0);
1703         int i;
1704
1705         /*
1706          *  If user excluded this chip, do not initialize it.
1707          *  I hate this code so much.  Must kill it.
1708          */
1709         if (io_port) {
1710                 for (i = 0 ; i < 8 ; i++) {
1711                         if (sym_driver_setup.excludes[i] == io_port)
1712                                 return -ENODEV;
1713                 }
1714         }
1715
1716         /*
1717          * Check if the chip is supported.  Then copy the chip description
1718          * to our device structure so we can make it match the actual device
1719          * and options.
1720          */
1721         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1722         chip = sym_lookup_chip_table(pdev->device, revision);
1723         if (!chip) {
1724                 dev_info(&pdev->dev, "device not supported\n");
1725                 return -ENODEV;
1726         }
1727         memcpy(&device->chip, chip, sizeof(device->chip));
1728         device->chip.revision_id = revision;
1729
1730         return 0;
1731 }
1732
1733 /*
1734  * Ignore Symbios chips controlled by various RAID controllers.
1735  * These controllers set value 0x52414944 at RAM end - 16.
1736  */
1737 static int __devinit sym_check_raid(struct sym_device *device)
1738 {
1739         unsigned int ram_size, ram_val;
1740
1741         if (!device->s.ramaddr)
1742                 return 0;
1743
1744         if (device->chip.features & FE_RAM8K)
1745                 ram_size = 8192;
1746         else
1747                 ram_size = 4096;
1748
1749         ram_val = readl(device->s.ramaddr + ram_size - 16);
1750         if (ram_val != 0x52414944)
1751                 return 0;
1752
1753         dev_info(&device->pdev->dev,
1754                         "not initializing, driven by RAID controller.\n");
1755         return -ENODEV;
1756 }
1757
1758 static int __devinit sym_set_workarounds(struct sym_device *device)
1759 {
1760         struct sym_chip *chip = &device->chip;
1761         struct pci_dev *pdev = device->pdev;
1762         u_short status_reg;
1763
1764         /*
1765          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1766          *  We must ensure the chip will use WRITE AND INVALIDATE.
1767          *  The revision number limit is for now arbitrary.
1768          */
1769         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1770                 chip->features  |= (FE_WRIE | FE_CLSE);
1771         }
1772
1773         /* If the chip can do Memory Write Invalidate, enable it */
1774         if (chip->features & FE_WRIE) {
1775                 if (pci_set_mwi(pdev))
1776                         return -ENODEV;
1777         }
1778
1779         /*
1780          *  Work around for errant bit in 895A. The 66Mhz
1781          *  capable bit is set erroneously. Clear this bit.
1782          *  (Item 1 DEL 533)
1783          *
1784          *  Make sure Config space and Features agree.
1785          *
1786          *  Recall: writes are not normal to status register -
1787          *  write a 1 to clear and a 0 to leave unchanged.
1788          *  Can only reset bits.
1789          */
1790         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1791         if (chip->features & FE_66MHZ) {
1792                 if (!(status_reg & PCI_STATUS_66MHZ))
1793                         chip->features &= ~FE_66MHZ;
1794         } else {
1795                 if (status_reg & PCI_STATUS_66MHZ) {
1796                         status_reg = PCI_STATUS_66MHZ;
1797                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1798                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1799                 }
1800         }
1801
1802         return 0;
1803 }
1804
1805 /*
1806  *  Read and check the PCI configuration for any detected NCR 
1807  *  boards and save data for attaching after all boards have 
1808  *  been detected.
1809  */
1810 static void __devinit
1811 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1812 {
1813         int i;
1814
1815         device->host_id = SYM_SETUP_HOST_ID;
1816         device->pdev = pdev;
1817
1818         i = pci_get_base_address(pdev, 1, &device->mmio_base);
1819         pci_get_base_address(pdev, i, &device->ram_base);
1820
1821 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1822         if (device->mmio_base)
1823                 device->s.ioaddr = pci_iomap(pdev, 1,
1824                                                 pci_resource_len(pdev, 1));
1825 #endif
1826         if (!device->s.ioaddr)
1827                 device->s.ioaddr = pci_iomap(pdev, 0,
1828                                                 pci_resource_len(pdev, 0));
1829         if (device->ram_base)
1830                 device->s.ramaddr = pci_iomap(pdev, i,
1831                                                 pci_resource_len(pdev, i));
1832 }
1833
1834 /*
1835  * The NCR PQS and PDS cards are constructed as a DEC bridge
1836  * behind which sits a proprietary NCR memory controller and
1837  * either four or two 53c875s as separate devices.  We can tell
1838  * if an 875 is part of a PQS/PDS or not since if it is, it will
1839  * be on the same bus as the memory controller.  In its usual
1840  * mode of operation, the 875s are slaved to the memory
1841  * controller for all transfers.  To operate with the Linux
1842  * driver, the memory controller is disabled and the 875s
1843  * freed to function independently.  The only wrinkle is that
1844  * the preset SCSI ID (which may be zero) must be read in from
1845  * a special configuration space register of the 875.
1846  */
1847 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1848 {
1849         int slot;
1850         u8 tmp;
1851
1852         for (slot = 0; slot < 256; slot++) {
1853                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1854
1855                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1856                         pci_dev_put(memc);
1857                         continue;
1858                 }
1859
1860                 /* bit 1: allow individual 875 configuration */
1861                 pci_read_config_byte(memc, 0x44, &tmp);
1862                 if ((tmp & 0x2) == 0) {
1863                         tmp |= 0x2;
1864                         pci_write_config_byte(memc, 0x44, tmp);
1865                 }
1866
1867                 /* bit 2: drive individual 875 interrupts to the bus */
1868                 pci_read_config_byte(memc, 0x45, &tmp);
1869                 if ((tmp & 0x4) == 0) {
1870                         tmp |= 0x4;
1871                         pci_write_config_byte(memc, 0x45, tmp);
1872                 }
1873
1874                 pci_dev_put(memc);
1875                 break;
1876         }
1877
1878         pci_read_config_byte(pdev, 0x84, &tmp);
1879         sym_dev->host_id = tmp;
1880 }
1881
1882 /*
1883  *  Called before unloading the module.
1884  *  Detach the host.
1885  *  We have to free resources and halt the NCR chip.
1886  */
1887 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1888 {
1889         printk("%s: detaching ...\n", sym_name(np));
1890
1891         del_timer_sync(&np->s.timer);
1892
1893         /*
1894          * Reset NCR chip.
1895          * We should use sym_soft_reset(), but we don't want to do 
1896          * so, since we may not be safe if interrupts occur.
1897          */
1898         printk("%s: resetting chip\n", sym_name(np));
1899         OUTB(np, nc_istat, SRST);
1900         udelay(10);
1901         OUTB(np, nc_istat, 0);
1902
1903         sym_free_resources(np, pdev);
1904
1905         return 1;
1906 }
1907
1908 /*
1909  * Driver host template.
1910  */
1911 static struct scsi_host_template sym2_template = {
1912         .module                 = THIS_MODULE,
1913         .name                   = "sym53c8xx",
1914         .info                   = sym53c8xx_info, 
1915         .queuecommand           = sym53c8xx_queue_command,
1916         .slave_alloc            = sym53c8xx_slave_alloc,
1917         .slave_configure        = sym53c8xx_slave_configure,
1918         .slave_destroy          = sym53c8xx_slave_destroy,
1919         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1920         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1921         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1922         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1923         .this_id                = 7,
1924         .use_clustering         = DISABLE_CLUSTERING,
1925 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1926         .proc_info              = sym53c8xx_proc_info,
1927         .proc_name              = NAME53C8XX,
1928 #endif
1929 };
1930
1931 static int attach_count;
1932
1933 static int __devinit sym2_probe(struct pci_dev *pdev,
1934                                 const struct pci_device_id *ent)
1935 {
1936         struct sym_device sym_dev;
1937         struct sym_nvram nvram;
1938         struct Scsi_Host *instance;
1939
1940         memset(&sym_dev, 0, sizeof(sym_dev));
1941         memset(&nvram, 0, sizeof(nvram));
1942
1943         if (pci_enable_device(pdev))
1944                 goto leave;
1945
1946         pci_set_master(pdev);
1947
1948         if (pci_request_regions(pdev, NAME53C8XX))
1949                 goto disable;
1950
1951         sym_init_device(pdev, &sym_dev);
1952         if (sym_check_supported(&sym_dev))
1953                 goto free;
1954
1955         if (sym_check_raid(&sym_dev))
1956                 goto leave;     /* Don't disable the device */
1957
1958         if (sym_set_workarounds(&sym_dev))
1959                 goto free;
1960
1961         sym_config_pqs(pdev, &sym_dev);
1962
1963         sym_get_nvram(&sym_dev, &nvram);
1964
1965         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1966         if (!instance)
1967                 goto free;
1968
1969         if (scsi_add_host(instance, &pdev->dev))
1970                 goto detach;
1971         scsi_scan_host(instance);
1972
1973         attach_count++;
1974
1975         return 0;
1976
1977  detach:
1978         sym_detach(pci_get_drvdata(pdev), pdev);
1979  free:
1980         pci_release_regions(pdev);
1981  disable:
1982         pci_disable_device(pdev);
1983  leave:
1984         return -ENODEV;
1985 }
1986
1987 static void __devexit sym2_remove(struct pci_dev *pdev)
1988 {
1989         struct sym_hcb *np = pci_get_drvdata(pdev);
1990         struct Scsi_Host *host = np->s.host;
1991
1992         scsi_remove_host(host);
1993         scsi_host_put(host);
1994
1995         sym_detach(np, pdev);
1996
1997         pci_release_regions(pdev);
1998         pci_disable_device(pdev);
1999
2000         attach_count--;
2001 }
2002
2003 static void sym2_get_signalling(struct Scsi_Host *shost)
2004 {
2005         struct sym_hcb *np = sym_get_hcb(shost);
2006         enum spi_signal_type type;
2007
2008         switch (np->scsi_mode) {
2009         case SMODE_SE:
2010                 type = SPI_SIGNAL_SE;
2011                 break;
2012         case SMODE_LVD:
2013                 type = SPI_SIGNAL_LVD;
2014                 break;
2015         case SMODE_HVD:
2016                 type = SPI_SIGNAL_HVD;
2017                 break;
2018         default:
2019                 type = SPI_SIGNAL_UNKNOWN;
2020                 break;
2021         }
2022         spi_signalling(shost) = type;
2023 }
2024
2025 static void sym2_set_offset(struct scsi_target *starget, int offset)
2026 {
2027         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2028         struct sym_hcb *np = sym_get_hcb(shost);
2029         struct sym_tcb *tp = &np->target[starget->id];
2030
2031         tp->tgoal.offset = offset;
2032         tp->tgoal.check_nego = 1;
2033 }
2034
2035 static void sym2_set_period(struct scsi_target *starget, int period)
2036 {
2037         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2038         struct sym_hcb *np = sym_get_hcb(shost);
2039         struct sym_tcb *tp = &np->target[starget->id];
2040
2041         /* have to have DT for these transfers, but DT will also
2042          * set width, so check that this is allowed */
2043         if (period <= np->minsync && spi_width(starget))
2044                 tp->tgoal.dt = 1;
2045
2046         tp->tgoal.period = period;
2047         tp->tgoal.check_nego = 1;
2048 }
2049
2050 static void sym2_set_width(struct scsi_target *starget, int width)
2051 {
2052         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2053         struct sym_hcb *np = sym_get_hcb(shost);
2054         struct sym_tcb *tp = &np->target[starget->id];
2055
2056         /* It is illegal to have DT set on narrow transfers.  If DT is
2057          * clear, we must also clear IU and QAS.  */
2058         if (width == 0)
2059                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2060
2061         tp->tgoal.width = width;
2062         tp->tgoal.check_nego = 1;
2063 }
2064
2065 static void sym2_set_dt(struct scsi_target *starget, int dt)
2066 {
2067         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2068         struct sym_hcb *np = sym_get_hcb(shost);
2069         struct sym_tcb *tp = &np->target[starget->id];
2070
2071         /* We must clear QAS and IU if DT is clear */
2072         if (dt)
2073                 tp->tgoal.dt = 1;
2074         else
2075                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2076         tp->tgoal.check_nego = 1;
2077 }
2078
2079 static void sym2_set_iu(struct scsi_target *starget, int iu)
2080 {
2081         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2082         struct sym_hcb *np = sym_get_hcb(shost);
2083         struct sym_tcb *tp = &np->target[starget->id];
2084
2085         if (iu)
2086                 tp->tgoal.iu = tp->tgoal.dt = 1;
2087         else
2088                 tp->tgoal.iu = 0;
2089         tp->tgoal.check_nego = 1;
2090 }
2091
2092 static void sym2_set_qas(struct scsi_target *starget, int qas)
2093 {
2094         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2095         struct sym_hcb *np = sym_get_hcb(shost);
2096         struct sym_tcb *tp = &np->target[starget->id];
2097
2098         if (qas)
2099                 tp->tgoal.dt = tp->tgoal.qas = 1;
2100         else
2101                 tp->tgoal.qas = 0;
2102         tp->tgoal.check_nego = 1;
2103 }
2104
2105
2106 static struct spi_function_template sym2_transport_functions = {
2107         .set_offset     = sym2_set_offset,
2108         .show_offset    = 1,
2109         .set_period     = sym2_set_period,
2110         .show_period    = 1,
2111         .set_width      = sym2_set_width,
2112         .show_width     = 1,
2113         .set_dt         = sym2_set_dt,
2114         .show_dt        = 1,
2115         .set_iu         = sym2_set_iu,
2116         .show_iu        = 1,
2117         .set_qas        = sym2_set_qas,
2118         .show_qas       = 1,
2119         .get_signalling = sym2_get_signalling,
2120 };
2121
2122 static struct pci_device_id sym2_id_table[] __devinitdata = {
2123         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2124           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2125         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2126           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2127         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2128           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2129         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2130           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2131         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2132           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2133         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2134           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2135         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2136           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2137         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2138           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2139         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2140           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2142           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2143         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2144           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2145         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2146           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2147         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2148           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2149         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2150           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2152           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2154           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2156           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2157         { 0, }
2158 };
2159
2160 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2161
2162 static struct pci_driver sym2_driver = {
2163         .name           = NAME53C8XX,
2164         .id_table       = sym2_id_table,
2165         .probe          = sym2_probe,
2166         .remove         = __devexit_p(sym2_remove),
2167 };
2168
2169 static int __init sym2_init(void)
2170 {
2171         int error;
2172
2173         sym2_setup_params();
2174         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2175         if (!sym2_transport_template)
2176                 return -ENODEV;
2177
2178         error = pci_register_driver(&sym2_driver);
2179         if (error)
2180                 spi_release_transport(sym2_transport_template);
2181         return error;
2182 }
2183
2184 static void __exit sym2_exit(void)
2185 {
2186         pci_unregister_driver(&sym2_driver);
2187         spi_release_transport(sym2_transport_template);
2188 }
2189
2190 module_init(sym2_init);
2191 module_exit(sym2_exit);