IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-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 #define IRQ_FMT "%d"
58 #define IRQ_PRM(x) (x)
59
60 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
61 unsigned int sym_debug_flags = 0;
62
63 static char *excl_string;
64 static char *safe_string;
65 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
66 module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
67 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
68 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
69 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
70 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
71 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
72 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
73 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
74 module_param_named(debug, sym_debug_flags, uint, 0);
75 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
76 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
77 module_param_named(excl, excl_string, charp, 0);
78 module_param_named(safe, safe_string, charp, 0);
79
80 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
81 MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
82 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
83 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
84 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
85 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
86 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
87 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
88 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
89 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
90 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
91 MODULE_PARM_DESC(nvram, "Option currently not used");
92 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
93 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
94
95 MODULE_LICENSE("GPL");
96 MODULE_VERSION(SYM_VERSION);
97 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
98 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
99
100 static void sym2_setup_params(void)
101 {
102         char *p = excl_string;
103         int xi = 0;
104
105         while (p && (xi < 8)) {
106                 char *next_p;
107                 int val = (int) simple_strtoul(p, &next_p, 0);
108                 sym_driver_setup.excludes[xi++] = val;
109                 p = next_p;
110         }
111
112         if (safe_string) {
113                 if (*safe_string == 'y') {
114                         sym_driver_setup.max_tag = 0;
115                         sym_driver_setup.burst_order = 0;
116                         sym_driver_setup.scsi_led = 0;
117                         sym_driver_setup.scsi_diff = 1;
118                         sym_driver_setup.irq_mode = 0;
119                         sym_driver_setup.scsi_bus_check = 2;
120                         sym_driver_setup.host_id = 7;
121                         sym_driver_setup.verbose = 2;
122                         sym_driver_setup.settle_delay = 10;
123                         sym_driver_setup.use_nvram = 1;
124                 } else if (*safe_string != 'n') {
125                         printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
126                                         " passed to safe option", safe_string);
127                 }
128         }
129 }
130
131 static struct scsi_transport_template *sym2_transport_template = NULL;
132
133 /*
134  *  Driver private area in the SCSI command structure.
135  */
136 struct sym_ucmd {               /* Override the SCSI pointer structure */
137         dma_addr_t      data_mapping;
138         unsigned char   data_mapped;
139         unsigned char   to_do;                  /* For error handling */
140         void (*old_done)(struct scsi_cmnd *);   /* For error handling */
141         struct completion *eh_done;             /* For error handling */
142 };
143
144 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
145 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
146
147 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
148 {
149         int dma_dir = cmd->sc_data_direction;
150
151         switch(SYM_UCMD_PTR(cmd)->data_mapped) {
152         case 2:
153                 pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, dma_dir);
154                 break;
155         case 1:
156                 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
157                                  cmd->request_bufflen, dma_dir);
158                 break;
159         }
160         SYM_UCMD_PTR(cmd)->data_mapped = 0;
161 }
162
163 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
164 {
165         dma_addr_t mapping;
166         int dma_dir = cmd->sc_data_direction;
167
168         mapping = pci_map_single(pdev, cmd->request_buffer,
169                                  cmd->request_bufflen, dma_dir);
170         if (mapping) {
171                 SYM_UCMD_PTR(cmd)->data_mapped  = 1;
172                 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
173         }
174
175         return mapping;
176 }
177
178 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
179 {
180         int use_sg;
181         int dma_dir = cmd->sc_data_direction;
182
183         use_sg = pci_map_sg(pdev, cmd->request_buffer, cmd->use_sg, dma_dir);
184         if (use_sg > 0) {
185                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
186                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
187         }
188
189         return use_sg;
190 }
191
192 #define unmap_scsi_data(np, cmd)        \
193                 __unmap_scsi_data(np->s.device, cmd)
194 #define map_scsi_single_data(np, cmd)   \
195                 __map_scsi_single_data(np->s.device, cmd)
196 #define map_scsi_sg_data(np, cmd)       \
197                 __map_scsi_sg_data(np->s.device, cmd)
198 /*
199  *  Complete a pending CAM CCB.
200  */
201 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
202 {
203         unmap_scsi_data(np, cmd);
204         cmd->scsi_done(cmd);
205 }
206
207 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
208 {
209         sym_set_cam_status(cmd, cam_status);
210         sym_xpt_done(np, cmd);
211 }
212
213
214 /*
215  *  Tell the SCSI layer about a BUS RESET.
216  */
217 void sym_xpt_async_bus_reset(struct sym_hcb *np)
218 {
219         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
220         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
221         np->s.settle_time_valid = 1;
222         if (sym_verbose >= 2)
223                 printf_info("%s: command processing suspended for %d seconds\n",
224                             sym_name(np), sym_driver_setup.settle_delay);
225 }
226
227 /*
228  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
229  */
230 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
231 {
232         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
233 }
234
235 /*
236  *  Choose the more appropriate CAM status if 
237  *  the IO encountered an extended error.
238  */
239 static int sym_xerr_cam_status(int cam_status, int x_status)
240 {
241         if (x_status) {
242                 if      (x_status & XE_PARITY_ERR)
243                         cam_status = DID_PARITY;
244                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
245                         cam_status = DID_ERROR;
246                 else if (x_status & XE_BAD_PHASE)
247                         cam_status = DID_ERROR;
248                 else
249                         cam_status = DID_ERROR;
250         }
251         return cam_status;
252 }
253
254 /*
255  *  Build CAM result for a failed or auto-sensed IO.
256  */
257 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
258 {
259         struct scsi_cmnd *cmd = cp->cmd;
260         u_int cam_status, scsi_status, drv_status;
261
262         drv_status  = 0;
263         cam_status  = DID_OK;
264         scsi_status = cp->ssss_status;
265
266         if (cp->host_flags & HF_SENSE) {
267                 scsi_status = cp->sv_scsi_status;
268                 resid = cp->sv_resid;
269                 if (sym_verbose && cp->sv_xerr_status)
270                         sym_print_xerr(cmd, cp->sv_xerr_status);
271                 if (cp->host_status == HS_COMPLETE &&
272                     cp->ssss_status == S_GOOD &&
273                     cp->xerr_status == 0) {
274                         cam_status = sym_xerr_cam_status(DID_OK,
275                                                          cp->sv_xerr_status);
276                         drv_status = DRIVER_SENSE;
277                         /*
278                          *  Bounce back the sense data to user.
279                          */
280                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
281                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
282                               min(sizeof(cmd->sense_buffer),
283                                   (size_t)SYM_SNS_BBUF_LEN));
284 #if 0
285                         /*
286                          *  If the device reports a UNIT ATTENTION condition 
287                          *  due to a RESET condition, we should consider all 
288                          *  disconnect CCBs for this unit as aborted.
289                          */
290                         if (1) {
291                                 u_char *p;
292                                 p  = (u_char *) cmd->sense_data;
293                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
294                                         sym_clear_tasks(np, DID_ABORT,
295                                                         cp->target,cp->lun, -1);
296                         }
297 #endif
298                 } else {
299                         /*
300                          * Error return from our internal request sense.  This
301                          * is bad: we must clear the contingent allegiance
302                          * condition otherwise the device will always return
303                          * BUSY.  Use a big stick.
304                          */
305                         sym_reset_scsi_target(np, cmd->device->id);
306                         cam_status = DID_ERROR;
307                 }
308         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
309                 cam_status = DID_OK;
310         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
311                 cam_status = DID_NO_CONNECT;
312         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
313                 cam_status = DID_ERROR;
314         else {                                          /* Extended error */
315                 if (sym_verbose) {
316                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
317                                 cp->host_status, cp->ssss_status,
318                                 cp->xerr_status);
319                 }
320                 /*
321                  *  Set the most appropriate value for CAM status.
322                  */
323                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
324         }
325         cmd->resid = resid;
326         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
327 }
328
329
330 /*
331  *  Build the scatter/gather array for an I/O.
332  */
333
334 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
335 {
336         struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
337         int segment;
338         unsigned int len = cmd->request_bufflen;
339
340         if (len) {
341                 dma_addr_t baddr = map_scsi_single_data(np, cmd);
342                 if (baddr) {
343                         if (len & 1) {
344                                 struct sym_tcb *tp = &np->target[cp->target];
345                                 if (tp->head.wval & EWS) {
346                                         len++;
347                                         cp->odd_byte_adjustment++;
348                                 }
349                         }
350                         cp->data_len = len;
351                         sym_build_sge(np, data, baddr, len);
352                         segment = 1;
353                 } else {
354                         segment = -2;
355                 }
356         } else {
357                 segment = 0;
358         }
359
360         return segment;
361 }
362
363 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
364 {
365         int segment;
366         int use_sg = (int) cmd->use_sg;
367
368         cp->data_len = 0;
369
370         if (!use_sg)
371                 segment = sym_scatter_no_sglist(np, cp, cmd);
372         else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
373                 struct scatterlist *scatter = (struct scatterlist *)cmd->request_buffer;
374                 struct sym_tcb *tp = &np->target[cp->target];
375                 struct sym_tblmove *data;
376
377                 if (use_sg > SYM_CONF_MAX_SG) {
378                         unmap_scsi_data(np, cmd);
379                         return -1;
380                 }
381
382                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
383
384                 for (segment = 0; segment < use_sg; segment++) {
385                         dma_addr_t baddr = sg_dma_address(&scatter[segment]);
386                         unsigned int len = sg_dma_len(&scatter[segment]);
387
388                         if ((len & 1) && (tp->head.wval & EWS)) {
389                                 len++;
390                                 cp->odd_byte_adjustment++;
391                         }
392
393                         sym_build_sge(np, &data[segment], baddr, len);
394                         cp->data_len += len;
395                 }
396         } else {
397                 segment = -2;
398         }
399
400         return segment;
401 }
402
403 /*
404  *  Queue a SCSI command.
405  */
406 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
407 {
408         struct scsi_device *sdev = cmd->device;
409         struct sym_tcb *tp;
410         struct sym_lcb *lp;
411         struct sym_ccb *cp;
412         int     order;
413
414         /*
415          *  Minimal checkings, so that we will not 
416          *  go outside our tables.
417          */
418         if (sdev->id == np->myaddr) {
419                 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
420                 return 0;
421         }
422
423         /*
424          *  Retrieve the target descriptor.
425          */
426         tp = &np->target[sdev->id];
427
428         /*
429          *  Select tagged/untagged.
430          */
431         lp = sym_lp(tp, sdev->lun);
432         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
433
434         /*
435          *  Queue the SCSI IO.
436          */
437         cp = sym_get_ccb(np, cmd, order);
438         if (!cp)
439                 return 1;       /* Means resource shortage */
440         sym_queue_scsiio(np, cmd, cp);
441         return 0;
442 }
443
444 /*
445  *  Setup buffers and pointers that address the CDB.
446  */
447 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
448 {
449         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
450
451         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
452         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
453
454         return 0;
455 }
456
457 /*
458  *  Setup pointers that address the data and start the I/O.
459  */
460 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
461 {
462         u32 lastp, goalp;
463         int dir;
464
465         /*
466          *  Build the CDB.
467          */
468         if (sym_setup_cdb(np, cmd, cp))
469                 goto out_abort;
470
471         /*
472          *  No direction means no data.
473          */
474         dir = cmd->sc_data_direction;
475         if (dir != DMA_NONE) {
476                 cp->segments = sym_scatter(np, cp, cmd);
477                 if (cp->segments < 0) {
478                         sym_set_cam_status(cmd, DID_ERROR);
479                         goto out_abort;
480                 }
481
482                 /*
483                  *  No segments means no data.
484                  */
485                 if (!cp->segments)
486                         dir = DMA_NONE;
487         } else {
488                 cp->data_len = 0;
489                 cp->segments = 0;
490         }
491
492         /*
493          *  Set the data pointer.
494          */
495         switch (dir) {
496         case DMA_BIDIRECTIONAL:
497                 printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
498                 sym_set_cam_status(cmd, DID_ERROR);
499                 goto out_abort;
500         case DMA_TO_DEVICE:
501                 goalp = SCRIPTA_BA(np, data_out2) + 8;
502                 lastp = goalp - 8 - (cp->segments * (2*4));
503                 break;
504         case DMA_FROM_DEVICE:
505                 cp->host_flags |= HF_DATA_IN;
506                 goalp = SCRIPTA_BA(np, data_in2) + 8;
507                 lastp = goalp - 8 - (cp->segments * (2*4));
508                 break;
509         case DMA_NONE:
510         default:
511                 lastp = goalp = SCRIPTB_BA(np, no_data);
512                 break;
513         }
514
515         /*
516          *  Set all pointers values needed by SCRIPTS.
517          */
518         cp->phys.head.lastp = cpu_to_scr(lastp);
519         cp->phys.head.savep = cpu_to_scr(lastp);
520         cp->startp          = cp->phys.head.savep;
521         cp->goalp           = cpu_to_scr(goalp);
522
523         /*
524          *  When `#ifed 1', the code below makes the driver 
525          *  panic on the first attempt to write to a SCSI device.
526          *  It is the first test we want to do after a driver 
527          *  change that does not seem obviously safe. :)
528          */
529 #if 0
530         switch (cp->cdb_buf[0]) {
531         case 0x0A: case 0x2A: case 0xAA:
532                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
533                 break;
534         default:
535                 break;
536         }
537 #endif
538
539         /*
540          *      activate this job.
541          */
542         sym_put_start_queue(np, cp);
543         return 0;
544
545 out_abort:
546         sym_free_ccb(np, cp);
547         sym_xpt_done(np, cmd);
548         return 0;
549 }
550
551
552 /*
553  *  timer daemon.
554  *
555  *  Misused to keep the driver running when
556  *  interrupts are not configured correctly.
557  */
558 static void sym_timer(struct sym_hcb *np)
559 {
560         unsigned long thistime = jiffies;
561
562         /*
563          *  Restart the timer.
564          */
565         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
566         add_timer(&np->s.timer);
567
568         /*
569          *  If we are resetting the ncr, wait for settle_time before 
570          *  clearing it. Then command processing will be resumed.
571          */
572         if (np->s.settle_time_valid) {
573                 if (time_before_eq(np->s.settle_time, thistime)) {
574                         if (sym_verbose >= 2 )
575                                 printk("%s: command processing resumed\n",
576                                        sym_name(np));
577                         np->s.settle_time_valid = 0;
578                 }
579                 return;
580         }
581
582         /*
583          *      Nothing to do for now, but that may come.
584          */
585         if (np->s.lasttime + 4*HZ < thistime) {
586                 np->s.lasttime = thistime;
587         }
588
589 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
590         /*
591          *  Some way-broken PCI bridges may lead to 
592          *  completions being lost when the clearing 
593          *  of the INTFLY flag by the CPU occurs 
594          *  concurrently with the chip raising this flag.
595          *  If this ever happen, lost completions will 
596          * be reaped here.
597          */
598         sym_wakeup_done(np);
599 #endif
600 }
601
602
603 /*
604  *  PCI BUS error handler.
605  */
606 void sym_log_bus_error(struct sym_hcb *np)
607 {
608         u_short pci_sts;
609         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
610         if (pci_sts & 0xf900) {
611                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
612                 printf("%s: PCI STATUS = 0x%04x\n",
613                         sym_name(np), pci_sts & 0xf900);
614         }
615 }
616
617 /*
618  * queuecommand method.  Entered with the host adapter lock held and
619  * interrupts disabled.
620  */
621 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
622                                         void (*done)(struct scsi_cmnd *))
623 {
624         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
625         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
626         int sts = 0;
627
628         cmd->scsi_done     = done;
629         memset(ucp, 0, sizeof(*ucp));
630
631         /*
632          *  Shorten our settle_time if needed for 
633          *  this command not to time out.
634          */
635         if (np->s.settle_time_valid && cmd->timeout_per_command) {
636                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
637                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
638                 if (time_after(np->s.settle_time, tlimit)) {
639                         np->s.settle_time = tlimit;
640                 }
641         }
642
643         if (np->s.settle_time_valid)
644                 return SCSI_MLQUEUE_HOST_BUSY;
645
646         sts = sym_queue_command(np, cmd);
647         if (sts)
648                 return SCSI_MLQUEUE_HOST_BUSY;
649         return 0;
650 }
651
652 /*
653  *  Linux entry point of the interrupt handler.
654  */
655 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
656 {
657         unsigned long flags;
658         struct sym_hcb *np = (struct sym_hcb *)dev_id;
659
660         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
661
662         spin_lock_irqsave(np->s.host->host_lock, flags);
663         sym_interrupt(np);
664         spin_unlock_irqrestore(np->s.host->host_lock, flags);
665
666         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
667
668         return IRQ_HANDLED;
669 }
670
671 /*
672  *  Linux entry point of the timer handler
673  */
674 static void sym53c8xx_timer(unsigned long npref)
675 {
676         struct sym_hcb *np = (struct sym_hcb *)npref;
677         unsigned long flags;
678
679         spin_lock_irqsave(np->s.host->host_lock, flags);
680         sym_timer(np);
681         spin_unlock_irqrestore(np->s.host->host_lock, flags);
682 }
683
684
685 /*
686  *  What the eh thread wants us to perform.
687  */
688 #define SYM_EH_ABORT            0
689 #define SYM_EH_DEVICE_RESET     1
690 #define SYM_EH_BUS_RESET        2
691 #define SYM_EH_HOST_RESET       3
692
693 /*
694  *  What we will do regarding the involved SCSI command.
695  */
696 #define SYM_EH_DO_IGNORE        0
697 #define SYM_EH_DO_WAIT          2
698
699 /*
700  *  scsi_done() alias when error recovery is in progress.
701  */
702 static void sym_eh_done(struct scsi_cmnd *cmd)
703 {
704         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
705         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
706
707         cmd->scsi_done = ucmd->old_done;
708
709         if (ucmd->to_do == SYM_EH_DO_WAIT)
710                 complete(ucmd->eh_done);
711 }
712
713 /*
714  *  Generic method for our eh processing.
715  *  The 'op' argument tells what we have to do.
716  */
717 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
718 {
719         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
720         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
721         struct Scsi_Host *host = cmd->device->host;
722         SYM_QUEHEAD *qp;
723         int to_do = SYM_EH_DO_IGNORE;
724         int sts = -1;
725         struct completion eh_done;
726
727         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
728
729         spin_lock_irq(host->host_lock);
730         /* This one is queued in some place -> to wait for completion */
731         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
732                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
733                 if (cp->cmd == cmd) {
734                         to_do = SYM_EH_DO_WAIT;
735                         break;
736                 }
737         }
738
739         if (to_do == SYM_EH_DO_WAIT) {
740                 init_completion(&eh_done);
741                 ucmd->old_done = cmd->scsi_done;
742                 ucmd->eh_done = &eh_done;
743                 wmb();
744                 cmd->scsi_done = sym_eh_done;
745         }
746
747         /* Try to proceed the operation we have been asked for */
748         sts = -1;
749         switch(op) {
750         case SYM_EH_ABORT:
751                 sts = sym_abort_scsiio(np, cmd, 1);
752                 break;
753         case SYM_EH_DEVICE_RESET:
754                 sts = sym_reset_scsi_target(np, cmd->device->id);
755                 break;
756         case SYM_EH_BUS_RESET:
757                 sym_reset_scsi_bus(np, 1);
758                 sts = 0;
759                 break;
760         case SYM_EH_HOST_RESET:
761                 sym_reset_scsi_bus(np, 0);
762                 sym_start_up (np, 1);
763                 sts = 0;
764                 break;
765         default:
766                 break;
767         }
768
769         /* On error, restore everything and cross fingers :) */
770         if (sts) {
771                 cmd->scsi_done = ucmd->old_done;
772                 to_do = SYM_EH_DO_IGNORE;
773         }
774
775         ucmd->to_do = to_do;
776         spin_unlock_irq(host->host_lock);
777
778         if (to_do == SYM_EH_DO_WAIT) {
779                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
780                         ucmd->to_do = SYM_EH_DO_IGNORE;
781                         wmb();
782                         sts = -2;
783                 }
784         }
785         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
786                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
787         return sts ? SCSI_FAILED : SCSI_SUCCESS;
788 }
789
790
791 /*
792  * Error handlers called from the eh thread (one thread per HBA).
793  */
794 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
795 {
796         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
797 }
798
799 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
800 {
801         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
802 }
803
804 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
805 {
806         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
807 }
808
809 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
810 {
811         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
812 }
813
814 /*
815  *  Tune device queuing depth, according to various limits.
816  */
817 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
818 {
819         struct sym_lcb *lp = sym_lp(tp, lun);
820         u_short oldtags;
821
822         if (!lp)
823                 return;
824
825         oldtags = lp->s.reqtags;
826
827         if (reqtags > lp->s.scdev_depth)
828                 reqtags = lp->s.scdev_depth;
829
830         lp->s.reqtags     = reqtags;
831
832         if (reqtags != oldtags) {
833                 dev_info(&tp->starget->dev,
834                          "tagged command queuing %s, command queue depth %d.\n",
835                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
836         }
837 }
838
839 /*
840  *  Linux select queue depths function
841  */
842 #define DEF_DEPTH       (sym_driver_setup.max_tag)
843 #define ALL_TARGETS     -2
844 #define NO_TARGET       -1
845 #define ALL_LUNS        -2
846 #define NO_LUN          -1
847
848 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
849 {
850         int c, h, t, u, v;
851         char *p = sym_driver_setup.tag_ctrl;
852         char *ep;
853
854         h = -1;
855         t = NO_TARGET;
856         u = NO_LUN;
857         while ((c = *p++) != 0) {
858                 v = simple_strtoul(p, &ep, 0);
859                 switch(c) {
860                 case '/':
861                         ++h;
862                         t = ALL_TARGETS;
863                         u = ALL_LUNS;
864                         break;
865                 case 't':
866                         if (t != target)
867                                 t = (target == v) ? v : NO_TARGET;
868                         u = ALL_LUNS;
869                         break;
870                 case 'u':
871                         if (u != lun)
872                                 u = (lun == v) ? v : NO_LUN;
873                         break;
874                 case 'q':
875                         if (h == np->s.unit &&
876                                 (t == ALL_TARGETS || t == target) &&
877                                 (u == ALL_LUNS    || u == lun))
878                                 return v;
879                         break;
880                 case '-':
881                         t = ALL_TARGETS;
882                         u = ALL_LUNS;
883                         break;
884                 default:
885                         break;
886                 }
887                 p = ep;
888         }
889         return DEF_DEPTH;
890 }
891
892 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
893 {
894         struct sym_hcb *np = sym_get_hcb(sdev->host);
895         struct sym_tcb *tp = &np->target[sdev->id];
896         struct sym_lcb *lp;
897
898         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
899                 return -ENXIO;
900
901         tp->starget = sdev->sdev_target;
902         /*
903          * Fail the device init if the device is flagged NOSCAN at BOOT in
904          * the NVRAM.  This may speed up boot and maintain coherency with
905          * BIOS device numbering.  Clearing the flag allows the user to
906          * rescan skipped devices later.  We also return an error for
907          * devices not flagged for SCAN LUNS in the NVRAM since some single
908          * lun devices behave badly when asked for a non zero LUN.
909          */
910
911         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
912                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
913                 starget_printk(KERN_INFO, tp->starget,
914                                 "Scan at boot disabled in NVRAM\n");
915                 return -ENXIO;
916         }
917
918         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
919                 if (sdev->lun != 0)
920                         return -ENXIO;
921                 starget_printk(KERN_INFO, tp->starget,
922                                 "Multiple LUNs disabled in NVRAM\n");
923         }
924
925         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
926         if (!lp)
927                 return -ENOMEM;
928
929         spi_min_period(tp->starget) = tp->usr_period;
930         spi_max_width(tp->starget) = tp->usr_width;
931
932         return 0;
933 }
934
935 /*
936  * Linux entry point for device queue sizing.
937  */
938 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
939 {
940         struct sym_hcb *np = sym_get_hcb(sdev->host);
941         struct sym_tcb *tp = &np->target[sdev->id];
942         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
943         int reqtags, depth_to_use;
944
945         /*
946          *  Get user flags.
947          */
948         lp->curr_flags = lp->user_flags;
949
950         /*
951          *  Select queue depth from driver setup.
952          *  Donnot use more than configured by user.
953          *  Use at least 2.
954          *  Donnot use more than our maximum.
955          */
956         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
957         if (reqtags > tp->usrtags)
958                 reqtags = tp->usrtags;
959         if (!sdev->tagged_supported)
960                 reqtags = 0;
961 #if 1 /* Avoid to locally queue commands for no good reasons */
962         if (reqtags > SYM_CONF_MAX_TAG)
963                 reqtags = SYM_CONF_MAX_TAG;
964         depth_to_use = (reqtags ? reqtags : 2);
965 #else
966         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
967 #endif
968         scsi_adjust_queue_depth(sdev,
969                                 (sdev->tagged_supported ?
970                                  MSG_SIMPLE_TAG : 0),
971                                 depth_to_use);
972         lp->s.scdev_depth = depth_to_use;
973         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
974
975         if (!spi_initial_dv(sdev->sdev_target))
976                 spi_dv_device(sdev);
977
978         return 0;
979 }
980
981 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
982 {
983         struct sym_hcb *np = sym_get_hcb(sdev->host);
984         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
985
986         if (lp->itlq_tbl)
987                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
988         kfree(lp->cb_tags);
989         sym_mfree_dma(lp, sizeof(*lp), "LCB");
990 }
991
992 /*
993  *  Linux entry point for info() function
994  */
995 static const char *sym53c8xx_info (struct Scsi_Host *host)
996 {
997         return SYM_DRIVER_NAME;
998 }
999
1000
1001 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1002 /*
1003  *  Proc file system stuff
1004  *
1005  *  A read operation returns adapter information.
1006  *  A write operation is a control command.
1007  *  The string is parsed in the driver code and the command is passed 
1008  *  to the sym_usercmd() function.
1009  */
1010
1011 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1012
1013 struct  sym_usrcmd {
1014         u_long  target;
1015         u_long  lun;
1016         u_long  data;
1017         u_long  cmd;
1018 };
1019
1020 #define UC_SETSYNC      10
1021 #define UC_SETTAGS      11
1022 #define UC_SETDEBUG     12
1023 #define UC_SETWIDE      14
1024 #define UC_SETFLAG      15
1025 #define UC_SETVERBOSE   17
1026 #define UC_RESETDEV     18
1027 #define UC_CLEARDEV     19
1028
1029 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1030 {
1031         struct sym_tcb *tp;
1032         int t, l;
1033
1034         switch (uc->cmd) {
1035         case 0: return;
1036
1037 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1038         case UC_SETDEBUG:
1039                 sym_debug_flags = uc->data;
1040                 break;
1041 #endif
1042         case UC_SETVERBOSE:
1043                 np->verbose = uc->data;
1044                 break;
1045         default:
1046                 /*
1047                  * We assume that other commands apply to targets.
1048                  * This should always be the case and avoid the below 
1049                  * 4 lines to be repeated 6 times.
1050                  */
1051                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1052                         if (!((uc->target >> t) & 1))
1053                                 continue;
1054                         tp = &np->target[t];
1055
1056                         switch (uc->cmd) {
1057
1058                         case UC_SETSYNC:
1059                                 if (!uc->data || uc->data >= 255) {
1060                                         tp->tgoal.iu = tp->tgoal.dt =
1061                                                 tp->tgoal.qas = 0;
1062                                         tp->tgoal.offset = 0;
1063                                 } else if (uc->data <= 9 && np->minsync_dt) {
1064                                         if (uc->data < np->minsync_dt)
1065                                                 uc->data = np->minsync_dt;
1066                                         tp->tgoal.iu = tp->tgoal.dt =
1067                                                 tp->tgoal.qas = 1;
1068                                         tp->tgoal.width = 1;
1069                                         tp->tgoal.period = uc->data;
1070                                         tp->tgoal.offset = np->maxoffs_dt;
1071                                 } else {
1072                                         if (uc->data < np->minsync)
1073                                                 uc->data = np->minsync;
1074                                         tp->tgoal.iu = tp->tgoal.dt =
1075                                                 tp->tgoal.qas = 0;
1076                                         tp->tgoal.period = uc->data;
1077                                         tp->tgoal.offset = np->maxoffs;
1078                                 }
1079                                 tp->tgoal.check_nego = 1;
1080                                 break;
1081                         case UC_SETWIDE:
1082                                 tp->tgoal.width = uc->data ? 1 : 0;
1083                                 tp->tgoal.check_nego = 1;
1084                                 break;
1085                         case UC_SETTAGS:
1086                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1087                                         sym_tune_dev_queuing(tp, l, uc->data);
1088                                 break;
1089                         case UC_RESETDEV:
1090                                 tp->to_reset = 1;
1091                                 np->istat_sem = SEM;
1092                                 OUTB(np, nc_istat, SIGP|SEM);
1093                                 break;
1094                         case UC_CLEARDEV:
1095                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1096                                         struct sym_lcb *lp = sym_lp(tp, l);
1097                                         if (lp) lp->to_clear = 1;
1098                                 }
1099                                 np->istat_sem = SEM;
1100                                 OUTB(np, nc_istat, SIGP|SEM);
1101                                 break;
1102                         case UC_SETFLAG:
1103                                 tp->usrflags = uc->data;
1104                                 break;
1105                         }
1106                 }
1107                 break;
1108         }
1109 }
1110
1111 static int skip_spaces(char *ptr, int len)
1112 {
1113         int cnt, c;
1114
1115         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1116
1117         return (len - cnt);
1118 }
1119
1120 static int get_int_arg(char *ptr, int len, u_long *pv)
1121 {
1122         char *end;
1123
1124         *pv = simple_strtoul(ptr, &end, 10);
1125         return (end - ptr);
1126 }
1127
1128 static int is_keyword(char *ptr, int len, char *verb)
1129 {
1130         int verb_len = strlen(verb);
1131
1132         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1133                 return verb_len;
1134         else
1135                 return 0;
1136 }
1137
1138 #define SKIP_SPACES(ptr, len)                                           \
1139         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1140                 return -EINVAL;                                         \
1141         ptr += arg_len; len -= arg_len;
1142
1143 #define GET_INT_ARG(ptr, len, v)                                        \
1144         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1145                 return -EINVAL;                                         \
1146         ptr += arg_len; len -= arg_len;
1147
1148
1149 /*
1150  * Parse a control command
1151  */
1152
1153 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1154 {
1155         char *ptr       = buffer;
1156         int len         = length;
1157         struct sym_usrcmd cmd, *uc = &cmd;
1158         int             arg_len;
1159         u_long          target;
1160
1161         memset(uc, 0, sizeof(*uc));
1162
1163         if (len > 0 && ptr[len-1] == '\n')
1164                 --len;
1165
1166         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1167                 uc->cmd = UC_SETSYNC;
1168         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1169                 uc->cmd = UC_SETTAGS;
1170         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1171                 uc->cmd = UC_SETVERBOSE;
1172         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1173                 uc->cmd = UC_SETWIDE;
1174 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1175         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1176                 uc->cmd = UC_SETDEBUG;
1177 #endif
1178         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1179                 uc->cmd = UC_SETFLAG;
1180         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1181                 uc->cmd = UC_RESETDEV;
1182         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1183                 uc->cmd = UC_CLEARDEV;
1184         else
1185                 arg_len = 0;
1186
1187 #ifdef DEBUG_PROC_INFO
1188 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1189 #endif
1190
1191         if (!arg_len)
1192                 return -EINVAL;
1193         ptr += arg_len; len -= arg_len;
1194
1195         switch(uc->cmd) {
1196         case UC_SETSYNC:
1197         case UC_SETTAGS:
1198         case UC_SETWIDE:
1199         case UC_SETFLAG:
1200         case UC_RESETDEV:
1201         case UC_CLEARDEV:
1202                 SKIP_SPACES(ptr, len);
1203                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1204                         ptr += arg_len; len -= arg_len;
1205                         uc->target = ~0;
1206                 } else {
1207                         GET_INT_ARG(ptr, len, target);
1208                         uc->target = (1<<target);
1209 #ifdef DEBUG_PROC_INFO
1210 printk("sym_user_command: target=%ld\n", target);
1211 #endif
1212                 }
1213                 break;
1214         }
1215
1216         switch(uc->cmd) {
1217         case UC_SETVERBOSE:
1218         case UC_SETSYNC:
1219         case UC_SETTAGS:
1220         case UC_SETWIDE:
1221                 SKIP_SPACES(ptr, len);
1222                 GET_INT_ARG(ptr, len, uc->data);
1223 #ifdef DEBUG_PROC_INFO
1224 printk("sym_user_command: data=%ld\n", uc->data);
1225 #endif
1226                 break;
1227 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1228         case UC_SETDEBUG:
1229                 while (len > 0) {
1230                         SKIP_SPACES(ptr, len);
1231                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1232                                 uc->data |= DEBUG_ALLOC;
1233                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1234                                 uc->data |= DEBUG_PHASE;
1235                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1236                                 uc->data |= DEBUG_QUEUE;
1237                         else if ((arg_len = is_keyword(ptr, len, "result")))
1238                                 uc->data |= DEBUG_RESULT;
1239                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1240                                 uc->data |= DEBUG_SCATTER;
1241                         else if ((arg_len = is_keyword(ptr, len, "script")))
1242                                 uc->data |= DEBUG_SCRIPT;
1243                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1244                                 uc->data |= DEBUG_TINY;
1245                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1246                                 uc->data |= DEBUG_TIMING;
1247                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1248                                 uc->data |= DEBUG_NEGO;
1249                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1250                                 uc->data |= DEBUG_TAGS;
1251                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1252                                 uc->data |= DEBUG_POINTER;
1253                         else
1254                                 return -EINVAL;
1255                         ptr += arg_len; len -= arg_len;
1256                 }
1257 #ifdef DEBUG_PROC_INFO
1258 printk("sym_user_command: data=%ld\n", uc->data);
1259 #endif
1260                 break;
1261 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1262         case UC_SETFLAG:
1263                 while (len > 0) {
1264                         SKIP_SPACES(ptr, len);
1265                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1266                                 uc->data &= ~SYM_DISC_ENABLED;
1267                         else
1268                                 return -EINVAL;
1269                         ptr += arg_len; len -= arg_len;
1270                 }
1271                 break;
1272         default:
1273                 break;
1274         }
1275
1276         if (len)
1277                 return -EINVAL;
1278         else {
1279                 unsigned long flags;
1280
1281                 spin_lock_irqsave(np->s.host->host_lock, flags);
1282                 sym_exec_user_command (np, uc);
1283                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1284         }
1285         return length;
1286 }
1287
1288 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1289
1290
1291 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1292 /*
1293  *  Informations through the proc file system.
1294  */
1295 struct info_str {
1296         char *buffer;
1297         int length;
1298         int offset;
1299         int pos;
1300 };
1301
1302 static void copy_mem_info(struct info_str *info, char *data, int len)
1303 {
1304         if (info->pos + len > info->length)
1305                 len = info->length - info->pos;
1306
1307         if (info->pos + len < info->offset) {
1308                 info->pos += len;
1309                 return;
1310         }
1311         if (info->pos < info->offset) {
1312                 data += (info->offset - info->pos);
1313                 len  -= (info->offset - info->pos);
1314         }
1315
1316         if (len > 0) {
1317                 memcpy(info->buffer + info->pos, data, len);
1318                 info->pos += len;
1319         }
1320 }
1321
1322 static int copy_info(struct info_str *info, char *fmt, ...)
1323 {
1324         va_list args;
1325         char buf[81];
1326         int len;
1327
1328         va_start(args, fmt);
1329         len = vsprintf(buf, fmt, args);
1330         va_end(args);
1331
1332         copy_mem_info(info, buf, len);
1333         return len;
1334 }
1335
1336 /*
1337  *  Copy formatted information into the input buffer.
1338  */
1339 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1340 {
1341         struct info_str info;
1342
1343         info.buffer     = ptr;
1344         info.length     = len;
1345         info.offset     = offset;
1346         info.pos        = 0;
1347
1348         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1349                          "revision id 0x%x\n",
1350                          np->s.chip_name, np->device_id, np->revision_id);
1351         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1352                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1353         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1354                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1355                          np->maxwide ? "Wide" : "Narrow",
1356                          np->minsync_dt ? ", DT capable" : "");
1357
1358         copy_info(&info, "Max. started commands %d, "
1359                          "max. commands per LUN %d\n",
1360                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1361
1362         return info.pos > info.offset? info.pos - info.offset : 0;
1363 }
1364 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1365
1366 /*
1367  *  Entry point of the scsi proc fs of the driver.
1368  *  - func = 0 means read  (returns adapter infos)
1369  *  - func = 1 means write (not yet merget from sym53c8xx)
1370  */
1371 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1372                         char **start, off_t offset, int length, int func)
1373 {
1374         struct sym_hcb *np = sym_get_hcb(host);
1375         int retv;
1376
1377         if (func) {
1378 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1379                 retv = sym_user_command(np, buffer, length);
1380 #else
1381                 retv = -EINVAL;
1382 #endif
1383         } else {
1384                 if (start)
1385                         *start = buffer;
1386 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1387                 retv = sym_host_info(np, buffer, offset, length);
1388 #else
1389                 retv = -EINVAL;
1390 #endif
1391         }
1392
1393         return retv;
1394 }
1395 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1396
1397 /*
1398  *      Free controller resources.
1399  */
1400 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1401 {
1402         /*
1403          *  Free O/S specific resources.
1404          */
1405         if (np->s.irq)
1406                 free_irq(np->s.irq, np);
1407         if (np->s.ioaddr)
1408                 pci_iounmap(pdev, np->s.ioaddr);
1409         if (np->s.ramaddr)
1410                 pci_iounmap(pdev, np->s.ramaddr);
1411         /*
1412          *  Free O/S independent resources.
1413          */
1414         sym_hcb_free(np);
1415
1416         sym_mfree_dma(np, sizeof(*np), "HCB");
1417 }
1418
1419 /*
1420  *  Ask/tell the system about DMA addressing.
1421  */
1422 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1423 {
1424 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1425 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1426 #define DMA_DAC_MASK    DMA_40BIT_MASK
1427 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1428 #define DMA_DAC_MASK    DMA_64BIT_MASK
1429 #endif
1430         if ((np->features & FE_DAC) &&
1431                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1432                 np->use_dac = 1;
1433                 return 0;
1434         }
1435 #endif
1436
1437         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1438                 return 0;
1439
1440         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1441         return -1;
1442 }
1443
1444 /*
1445  *  Host attach and initialisations.
1446  *
1447  *  Allocate host data and ncb structure.
1448  *  Remap MMIO region.
1449  *  Do chip initialization.
1450  *  If all is OK, install interrupt handling and
1451  *  start the timer daemon.
1452  */
1453 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1454                 int unit, struct sym_device *dev)
1455 {
1456         struct host_data *host_data;
1457         struct sym_hcb *np = NULL;
1458         struct Scsi_Host *instance = NULL;
1459         struct pci_dev *pdev = dev->pdev;
1460         unsigned long flags;
1461         struct sym_fw *fw;
1462
1463         printk(KERN_INFO
1464                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1465                 unit, dev->chip.name, dev->chip.revision_id,
1466                 pci_name(pdev), IRQ_PRM(pdev->irq));
1467
1468         /*
1469          *  Get the firmware for this chip.
1470          */
1471         fw = sym_find_firmware(&dev->chip);
1472         if (!fw)
1473                 goto attach_failed;
1474
1475         /*
1476          *      Allocate host_data structure
1477          */
1478         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1479         if (!instance)
1480                 goto attach_failed;
1481         host_data = (struct host_data *) instance->hostdata;
1482
1483         /*
1484          *  Allocate immediately the host control block, 
1485          *  since we are only expecting to succeed. :)
1486          *  We keep track in the HCB of all the resources that 
1487          *  are to be released on error.
1488          */
1489         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1490         if (!np)
1491                 goto attach_failed;
1492         np->s.device = pdev;
1493         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1494         host_data->ncb = np;
1495         np->s.host = instance;
1496
1497         pci_set_drvdata(pdev, np);
1498
1499         /*
1500          *  Copy some useful infos to the HCB.
1501          */
1502         np->hcb_ba      = vtobus(np);
1503         np->verbose     = sym_driver_setup.verbose;
1504         np->s.device    = pdev;
1505         np->s.unit      = unit;
1506         np->device_id   = dev->chip.device_id;
1507         np->revision_id = dev->chip.revision_id;
1508         np->features    = dev->chip.features;
1509         np->clock_divn  = dev->chip.nr_divisor;
1510         np->maxoffs     = dev->chip.offset_max;
1511         np->maxburst    = dev->chip.burst_max;
1512         np->myaddr      = dev->host_id;
1513
1514         /*
1515          *  Edit its name.
1516          */
1517         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1518         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1519
1520         if (sym_setup_bus_dma_mask(np))
1521                 goto attach_failed;
1522
1523         /*
1524          *  Try to map the controller chip to
1525          *  virtual and physical memory.
1526          */
1527         np->mmio_ba = (u32)dev->mmio_base;
1528         np->s.ioaddr    = dev->s.ioaddr;
1529         np->s.ramaddr   = dev->s.ramaddr;
1530         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1531
1532         /*
1533          *  Map on-chip RAM if present and supported.
1534          */
1535         if (!(np->features & FE_RAM))
1536                 dev->ram_base = 0;
1537         if (dev->ram_base) {
1538                 np->ram_ba = (u32)dev->ram_base;
1539                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1540         }
1541
1542         if (sym_hcb_attach(instance, fw, dev->nvram))
1543                 goto attach_failed;
1544
1545         /*
1546          *  Install the interrupt handler.
1547          *  If we synchonize the C code with SCRIPTS on interrupt, 
1548          *  we do not want to share the INTR line at all.
1549          */
1550         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, np)) {
1551                 printf_err("%s: request irq %d failure\n",
1552                         sym_name(np), pdev->irq);
1553                 goto attach_failed;
1554         }
1555         np->s.irq = pdev->irq;
1556
1557         /*
1558          *  After SCSI devices have been opened, we cannot
1559          *  reset the bus safely, so we do it here.
1560          */
1561         spin_lock_irqsave(instance->host_lock, flags);
1562         if (sym_reset_scsi_bus(np, 0))
1563                 goto reset_failed;
1564
1565         /*
1566          *  Start the SCRIPTS.
1567          */
1568         sym_start_up (np, 1);
1569
1570         /*
1571          *  Start the timer daemon
1572          */
1573         init_timer(&np->s.timer);
1574         np->s.timer.data     = (unsigned long) np;
1575         np->s.timer.function = sym53c8xx_timer;
1576         np->s.lasttime=0;
1577         sym_timer (np);
1578
1579         /*
1580          *  Fill Linux host instance structure
1581          *  and return success.
1582          */
1583         instance->max_channel   = 0;
1584         instance->this_id       = np->myaddr;
1585         instance->max_id        = np->maxwide ? 16 : 8;
1586         instance->max_lun       = SYM_CONF_MAX_LUN;
1587         instance->unique_id     = pci_resource_start(pdev, 0);
1588         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1589         instance->can_queue     = (SYM_CONF_MAX_START-2);
1590         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1591         instance->max_cmd_len   = 16;
1592         BUG_ON(sym2_transport_template == NULL);
1593         instance->transportt    = sym2_transport_template;
1594
1595         spin_unlock_irqrestore(instance->host_lock, flags);
1596
1597         return instance;
1598
1599  reset_failed:
1600         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1601                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1602         spin_unlock_irqrestore(instance->host_lock, flags);
1603  attach_failed:
1604         if (!instance)
1605                 return NULL;
1606         printf_info("%s: giving up ...\n", sym_name(np));
1607         if (np)
1608                 sym_free_resources(np, pdev);
1609         scsi_host_put(instance);
1610
1611         return NULL;
1612  }
1613
1614
1615 /*
1616  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1617  */
1618 #if SYM_CONF_NVRAM_SUPPORT
1619 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1620 {
1621         devp->nvram = nvp;
1622         devp->device_id = devp->chip.device_id;
1623         nvp->type = 0;
1624
1625         sym_read_nvram(devp, nvp);
1626 }
1627 #else
1628 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1629 {
1630 }
1631 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1632
1633 static int __devinit sym_check_supported(struct sym_device *device)
1634 {
1635         struct sym_chip *chip;
1636         struct pci_dev *pdev = device->pdev;
1637         u_char revision;
1638         unsigned long io_port = pci_resource_start(pdev, 0);
1639         int i;
1640
1641         /*
1642          *  If user excluded this chip, do not initialize it.
1643          *  I hate this code so much.  Must kill it.
1644          */
1645         if (io_port) {
1646                 for (i = 0 ; i < 8 ; i++) {
1647                         if (sym_driver_setup.excludes[i] == io_port)
1648                                 return -ENODEV;
1649                 }
1650         }
1651
1652         /*
1653          * Check if the chip is supported.  Then copy the chip description
1654          * to our device structure so we can make it match the actual device
1655          * and options.
1656          */
1657         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1658         chip = sym_lookup_chip_table(pdev->device, revision);
1659         if (!chip) {
1660                 dev_info(&pdev->dev, "device not supported\n");
1661                 return -ENODEV;
1662         }
1663         memcpy(&device->chip, chip, sizeof(device->chip));
1664         device->chip.revision_id = revision;
1665
1666         return 0;
1667 }
1668
1669 /*
1670  * Ignore Symbios chips controlled by various RAID controllers.
1671  * These controllers set value 0x52414944 at RAM end - 16.
1672  */
1673 static int __devinit sym_check_raid(struct sym_device *device)
1674 {
1675         unsigned int ram_size, ram_val;
1676
1677         if (!device->s.ramaddr)
1678                 return 0;
1679
1680         if (device->chip.features & FE_RAM8K)
1681                 ram_size = 8192;
1682         else
1683                 ram_size = 4096;
1684
1685         ram_val = readl(device->s.ramaddr + ram_size - 16);
1686         if (ram_val != 0x52414944)
1687                 return 0;
1688
1689         dev_info(&device->pdev->dev,
1690                         "not initializing, driven by RAID controller.\n");
1691         return -ENODEV;
1692 }
1693
1694 static int __devinit sym_set_workarounds(struct sym_device *device)
1695 {
1696         struct sym_chip *chip = &device->chip;
1697         struct pci_dev *pdev = device->pdev;
1698         u_short status_reg;
1699
1700         /*
1701          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1702          *  We must ensure the chip will use WRITE AND INVALIDATE.
1703          *  The revision number limit is for now arbitrary.
1704          */
1705         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1706                 chip->features  |= (FE_WRIE | FE_CLSE);
1707         }
1708
1709         /* If the chip can do Memory Write Invalidate, enable it */
1710         if (chip->features & FE_WRIE) {
1711                 if (pci_set_mwi(pdev))
1712                         return -ENODEV;
1713         }
1714
1715         /*
1716          *  Work around for errant bit in 895A. The 66Mhz
1717          *  capable bit is set erroneously. Clear this bit.
1718          *  (Item 1 DEL 533)
1719          *
1720          *  Make sure Config space and Features agree.
1721          *
1722          *  Recall: writes are not normal to status register -
1723          *  write a 1 to clear and a 0 to leave unchanged.
1724          *  Can only reset bits.
1725          */
1726         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1727         if (chip->features & FE_66MHZ) {
1728                 if (!(status_reg & PCI_STATUS_66MHZ))
1729                         chip->features &= ~FE_66MHZ;
1730         } else {
1731                 if (status_reg & PCI_STATUS_66MHZ) {
1732                         status_reg = PCI_STATUS_66MHZ;
1733                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1734                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1735                 }
1736         }
1737
1738         return 0;
1739 }
1740
1741 /*
1742  *  Read and check the PCI configuration for any detected NCR 
1743  *  boards and save data for attaching after all boards have 
1744  *  been detected.
1745  */
1746 static void __devinit
1747 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1748 {
1749         int i = 2;
1750         struct pci_bus_region bus_addr;
1751
1752         device->host_id = SYM_SETUP_HOST_ID;
1753         device->pdev = pdev;
1754
1755         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1756         device->mmio_base = bus_addr.start;
1757
1758         /*
1759          * If the BAR is 64-bit, resource 2 will be occupied by the
1760          * upper 32 bits
1761          */
1762         if (!pdev->resource[i].flags)
1763                 i++;
1764         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1765         device->ram_base = bus_addr.start;
1766
1767 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1768         if (device->mmio_base)
1769                 device->s.ioaddr = pci_iomap(pdev, 1,
1770                                                 pci_resource_len(pdev, 1));
1771 #endif
1772         if (!device->s.ioaddr)
1773                 device->s.ioaddr = pci_iomap(pdev, 0,
1774                                                 pci_resource_len(pdev, 0));
1775         if (device->ram_base)
1776                 device->s.ramaddr = pci_iomap(pdev, i,
1777                                                 pci_resource_len(pdev, i));
1778 }
1779
1780 /*
1781  * The NCR PQS and PDS cards are constructed as a DEC bridge
1782  * behind which sits a proprietary NCR memory controller and
1783  * either four or two 53c875s as separate devices.  We can tell
1784  * if an 875 is part of a PQS/PDS or not since if it is, it will
1785  * be on the same bus as the memory controller.  In its usual
1786  * mode of operation, the 875s are slaved to the memory
1787  * controller for all transfers.  To operate with the Linux
1788  * driver, the memory controller is disabled and the 875s
1789  * freed to function independently.  The only wrinkle is that
1790  * the preset SCSI ID (which may be zero) must be read in from
1791  * a special configuration space register of the 875.
1792  */
1793 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1794 {
1795         int slot;
1796         u8 tmp;
1797
1798         for (slot = 0; slot < 256; slot++) {
1799                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1800
1801                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1802                         pci_dev_put(memc);
1803                         continue;
1804                 }
1805
1806                 /* bit 1: allow individual 875 configuration */
1807                 pci_read_config_byte(memc, 0x44, &tmp);
1808                 if ((tmp & 0x2) == 0) {
1809                         tmp |= 0x2;
1810                         pci_write_config_byte(memc, 0x44, tmp);
1811                 }
1812
1813                 /* bit 2: drive individual 875 interrupts to the bus */
1814                 pci_read_config_byte(memc, 0x45, &tmp);
1815                 if ((tmp & 0x4) == 0) {
1816                         tmp |= 0x4;
1817                         pci_write_config_byte(memc, 0x45, tmp);
1818                 }
1819
1820                 pci_dev_put(memc);
1821                 break;
1822         }
1823
1824         pci_read_config_byte(pdev, 0x84, &tmp);
1825         sym_dev->host_id = tmp;
1826 }
1827
1828 /*
1829  *  Called before unloading the module.
1830  *  Detach the host.
1831  *  We have to free resources and halt the NCR chip.
1832  */
1833 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1834 {
1835         printk("%s: detaching ...\n", sym_name(np));
1836
1837         del_timer_sync(&np->s.timer);
1838
1839         /*
1840          * Reset NCR chip.
1841          * We should use sym_soft_reset(), but we don't want to do 
1842          * so, since we may not be safe if interrupts occur.
1843          */
1844         printk("%s: resetting chip\n", sym_name(np));
1845         OUTB(np, nc_istat, SRST);
1846         INB(np, nc_mbox1);
1847         udelay(10);
1848         OUTB(np, nc_istat, 0);
1849
1850         sym_free_resources(np, pdev);
1851
1852         return 1;
1853 }
1854
1855 /*
1856  * Driver host template.
1857  */
1858 static struct scsi_host_template sym2_template = {
1859         .module                 = THIS_MODULE,
1860         .name                   = "sym53c8xx",
1861         .info                   = sym53c8xx_info, 
1862         .queuecommand           = sym53c8xx_queue_command,
1863         .slave_alloc            = sym53c8xx_slave_alloc,
1864         .slave_configure        = sym53c8xx_slave_configure,
1865         .slave_destroy          = sym53c8xx_slave_destroy,
1866         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1867         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1868         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1869         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1870         .this_id                = 7,
1871         .use_clustering         = ENABLE_CLUSTERING,
1872         .max_sectors            = 0xFFFF,
1873 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1874         .proc_info              = sym53c8xx_proc_info,
1875         .proc_name              = NAME53C8XX,
1876 #endif
1877 };
1878
1879 static int attach_count;
1880
1881 static int __devinit sym2_probe(struct pci_dev *pdev,
1882                                 const struct pci_device_id *ent)
1883 {
1884         struct sym_device sym_dev;
1885         struct sym_nvram nvram;
1886         struct Scsi_Host *instance;
1887
1888         memset(&sym_dev, 0, sizeof(sym_dev));
1889         memset(&nvram, 0, sizeof(nvram));
1890
1891         if (pci_enable_device(pdev))
1892                 goto leave;
1893
1894         pci_set_master(pdev);
1895
1896         if (pci_request_regions(pdev, NAME53C8XX))
1897                 goto disable;
1898
1899         sym_init_device(pdev, &sym_dev);
1900         if (sym_check_supported(&sym_dev))
1901                 goto free;
1902
1903         if (sym_check_raid(&sym_dev))
1904                 goto leave;     /* Don't disable the device */
1905
1906         if (sym_set_workarounds(&sym_dev))
1907                 goto free;
1908
1909         sym_config_pqs(pdev, &sym_dev);
1910
1911         sym_get_nvram(&sym_dev, &nvram);
1912
1913         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1914         if (!instance)
1915                 goto free;
1916
1917         if (scsi_add_host(instance, &pdev->dev))
1918                 goto detach;
1919         scsi_scan_host(instance);
1920
1921         attach_count++;
1922
1923         return 0;
1924
1925  detach:
1926         sym_detach(pci_get_drvdata(pdev), pdev);
1927  free:
1928         pci_release_regions(pdev);
1929  disable:
1930         pci_disable_device(pdev);
1931  leave:
1932         return -ENODEV;
1933 }
1934
1935 static void __devexit sym2_remove(struct pci_dev *pdev)
1936 {
1937         struct sym_hcb *np = pci_get_drvdata(pdev);
1938         struct Scsi_Host *host = np->s.host;
1939
1940         scsi_remove_host(host);
1941         scsi_host_put(host);
1942
1943         sym_detach(np, pdev);
1944
1945         pci_release_regions(pdev);
1946         pci_disable_device(pdev);
1947
1948         attach_count--;
1949 }
1950
1951 static void sym2_get_signalling(struct Scsi_Host *shost)
1952 {
1953         struct sym_hcb *np = sym_get_hcb(shost);
1954         enum spi_signal_type type;
1955
1956         switch (np->scsi_mode) {
1957         case SMODE_SE:
1958                 type = SPI_SIGNAL_SE;
1959                 break;
1960         case SMODE_LVD:
1961                 type = SPI_SIGNAL_LVD;
1962                 break;
1963         case SMODE_HVD:
1964                 type = SPI_SIGNAL_HVD;
1965                 break;
1966         default:
1967                 type = SPI_SIGNAL_UNKNOWN;
1968                 break;
1969         }
1970         spi_signalling(shost) = type;
1971 }
1972
1973 static void sym2_set_offset(struct scsi_target *starget, int offset)
1974 {
1975         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1976         struct sym_hcb *np = sym_get_hcb(shost);
1977         struct sym_tcb *tp = &np->target[starget->id];
1978
1979         tp->tgoal.offset = offset;
1980         tp->tgoal.check_nego = 1;
1981 }
1982
1983 static void sym2_set_period(struct scsi_target *starget, int period)
1984 {
1985         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1986         struct sym_hcb *np = sym_get_hcb(shost);
1987         struct sym_tcb *tp = &np->target[starget->id];
1988
1989         /* have to have DT for these transfers, but DT will also
1990          * set width, so check that this is allowed */
1991         if (period <= np->minsync && spi_width(starget))
1992                 tp->tgoal.dt = 1;
1993
1994         tp->tgoal.period = period;
1995         tp->tgoal.check_nego = 1;
1996 }
1997
1998 static void sym2_set_width(struct scsi_target *starget, int width)
1999 {
2000         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2001         struct sym_hcb *np = sym_get_hcb(shost);
2002         struct sym_tcb *tp = &np->target[starget->id];
2003
2004         /* It is illegal to have DT set on narrow transfers.  If DT is
2005          * clear, we must also clear IU and QAS.  */
2006         if (width == 0)
2007                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2008
2009         tp->tgoal.width = width;
2010         tp->tgoal.check_nego = 1;
2011 }
2012
2013 static void sym2_set_dt(struct scsi_target *starget, int dt)
2014 {
2015         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2016         struct sym_hcb *np = sym_get_hcb(shost);
2017         struct sym_tcb *tp = &np->target[starget->id];
2018
2019         /* We must clear QAS and IU if DT is clear */
2020         if (dt)
2021                 tp->tgoal.dt = 1;
2022         else
2023                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2024         tp->tgoal.check_nego = 1;
2025 }
2026
2027 #if 0
2028 static void sym2_set_iu(struct scsi_target *starget, int iu)
2029 {
2030         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2031         struct sym_hcb *np = sym_get_hcb(shost);
2032         struct sym_tcb *tp = &np->target[starget->id];
2033
2034         if (iu)
2035                 tp->tgoal.iu = tp->tgoal.dt = 1;
2036         else
2037                 tp->tgoal.iu = 0;
2038         tp->tgoal.check_nego = 1;
2039 }
2040
2041 static void sym2_set_qas(struct scsi_target *starget, int qas)
2042 {
2043         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2044         struct sym_hcb *np = sym_get_hcb(shost);
2045         struct sym_tcb *tp = &np->target[starget->id];
2046
2047         if (qas)
2048                 tp->tgoal.dt = tp->tgoal.qas = 1;
2049         else
2050                 tp->tgoal.qas = 0;
2051         tp->tgoal.check_nego = 1;
2052 }
2053 #endif
2054
2055 static struct spi_function_template sym2_transport_functions = {
2056         .set_offset     = sym2_set_offset,
2057         .show_offset    = 1,
2058         .set_period     = sym2_set_period,
2059         .show_period    = 1,
2060         .set_width      = sym2_set_width,
2061         .show_width     = 1,
2062         .set_dt         = sym2_set_dt,
2063         .show_dt        = 1,
2064 #if 0
2065         .set_iu         = sym2_set_iu,
2066         .show_iu        = 1,
2067         .set_qas        = sym2_set_qas,
2068         .show_qas       = 1,
2069 #endif
2070         .get_signalling = sym2_get_signalling,
2071 };
2072
2073 static struct pci_device_id sym2_id_table[] __devinitdata = {
2074         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2075           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2076         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2077           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2078         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2079           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2080         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2081           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2082         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2083           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2084         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2085           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2086         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2087           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2088         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2089           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2090         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2091           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2092         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2093           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2094         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2095           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2096         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2097           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2098         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2099           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2100         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2101           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2102         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2103           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2104         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2105           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2106         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2107           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2108         { 0, }
2109 };
2110
2111 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2112
2113 static struct pci_driver sym2_driver = {
2114         .name           = NAME53C8XX,
2115         .id_table       = sym2_id_table,
2116         .probe          = sym2_probe,
2117         .remove         = __devexit_p(sym2_remove),
2118 };
2119
2120 static int __init sym2_init(void)
2121 {
2122         int error;
2123
2124         sym2_setup_params();
2125         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2126         if (!sym2_transport_template)
2127                 return -ENODEV;
2128
2129         error = pci_register_driver(&sym2_driver);
2130         if (error)
2131                 spi_release_transport(sym2_transport_template);
2132         return error;
2133 }
2134
2135 static void __exit sym2_exit(void)
2136 {
2137         pci_unregister_driver(&sym2_driver);
2138         spi_release_transport(sym2_transport_template);
2139 }
2140
2141 module_init(sym2_init);
2142 module_exit(sym2_exit);