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[SCSI] allow sleeping in ->eh_device_reset_handler()
[deliverable/linux.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
CommitLineData
1da177e4
LT		 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
66struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
67unsigned int sym_debug_flags = 0;
68
69static char *excl_string;
70static char *safe_string;
71module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
72module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
73module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
74module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
75module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
76module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
77module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
78module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
79module_param_named(verb, sym_driver_setup.verbose, byte, 0);
80module_param_named(debug, sym_debug_flags, uint, 0);
81module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
82module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
83module_param_named(excl, excl_string, charp, 0);
84module_param_named(safe, safe_string, charp, 0);
85
86MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
87MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
88MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
89MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
90MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
91MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
92MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
93MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
94MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
95MODULE_PARM_DESC(debug, "Set bits to enable debugging");
96MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
97MODULE_PARM_DESC(nvram, "Option currently not used");
98MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
99MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
100
101MODULE_LICENSE("GPL");
102MODULE_VERSION(SYM_VERSION);
103MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
104MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
105
106static 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 */
147static int __devinit
148pci_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);
53222b90 158 if (tmp > 0) {
1da177e4
LT		 159 dev_err(&pdev->dev,
160 "BAR %d is 64-bit, disabling\n", index - 1);
53222b90
MW		 161 base = 0;
162 }
1da177e4
LT		 163 }
164
165 if ((base & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
166 base &= PCI_BASE_ADDRESS_IO_MASK;
167 } else {
168 base &= PCI_BASE_ADDRESS_MEM_MASK;
169 }
170
171 *basep = base;
172 return index;
173#undef PCI_BAR_OFFSET
174}
175
176static struct scsi_transport_template *sym2_transport_template = NULL;
177
178/*
179 * Used by the eh thread to wait for command completion.
180 * It is allocated on the eh thread stack.
181 */
182struct sym_eh_wait {
183 struct completion done;
184 struct timer_list timer;
185 void (*old_done)(struct scsi_cmnd *);
186 int to_do;
187 int timed_out;
188};
189
190/*
191 * Driver private area in the SCSI command structure.
192 */
193struct sym_ucmd { /* Override the SCSI pointer structure */
194 dma_addr_t data_mapping;
195 u_char data_mapped;
196 struct sym_eh_wait *eh_wait;
197};
198
199#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
200#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
201
202static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
203{
204 int dma_dir = cmd->sc_data_direction;
205
206 switch(SYM_UCMD_PTR(cmd)->data_mapped) {
207 case 2:
208 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
209 break;
210 case 1:
211 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
212 cmd->request_bufflen, dma_dir);
213 break;
214 }
215 SYM_UCMD_PTR(cmd)->data_mapped = 0;
216}
217
218static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
219{
220 dma_addr_t mapping;
221 int dma_dir = cmd->sc_data_direction;
222
223 mapping = pci_map_single(pdev, cmd->request_buffer,
224 cmd->request_bufflen, dma_dir);
225 if (mapping) {
226 SYM_UCMD_PTR(cmd)->data_mapped = 1;
227 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
228 }
229
230 return mapping;
231}
232
233static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
234{
235 int use_sg;
236 int dma_dir = cmd->sc_data_direction;
237
238 use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
239 if (use_sg > 0) {
240 SYM_UCMD_PTR(cmd)->data_mapped = 2;
241 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
242 }
243
244 return use_sg;
245}
246
247#define unmap_scsi_data(np, cmd) \
248 __unmap_scsi_data(np->s.device, cmd)
249#define map_scsi_single_data(np, cmd) \
250 __map_scsi_single_data(np->s.device, cmd)
251#define map_scsi_sg_data(np, cmd) \
252 __map_scsi_sg_data(np->s.device, cmd)
253/*
254 * Complete a pending CAM CCB.
255 */
256void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
257{
258 unmap_scsi_data(np, cmd);
259 cmd->scsi_done(cmd);
260}
261
262static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
263{
264 sym_set_cam_status(cmd, cam_status);
265 sym_xpt_done(np, cmd);
266}
267
268
269/*
270 * Tell the SCSI layer about a BUS RESET.
271 */
272void sym_xpt_async_bus_reset(struct sym_hcb *np)
273{
274 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
275 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
276 np->s.settle_time_valid = 1;
277 if (sym_verbose >= 2)
278 printf_info("%s: command processing suspended for %d seconds\n",
279 sym_name(np), sym_driver_setup.settle_delay);
280}
281
282/*
283 * Tell the SCSI layer about a BUS DEVICE RESET message sent.
284 */
285void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
286{
287 printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
288}
289
290/*
291 * Choose the more appropriate CAM status if
292 * the IO encountered an extended error.
293 */
294static int sym_xerr_cam_status(int cam_status, int x_status)
295{
296 if (x_status) {
297 if (x_status & XE_PARITY_ERR)
298 cam_status = DID_PARITY;
299 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
300 cam_status = DID_ERROR;
301 else if (x_status & XE_BAD_PHASE)
302 cam_status = DID_ERROR;
303 else
304 cam_status = DID_ERROR;
305 }
306 return cam_status;
307}
308
309/*
310 * Build CAM result for a failed or auto-sensed IO.
311 */
312void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
313{
314 struct scsi_cmnd *cmd = cp->cmd;
315 u_int cam_status, scsi_status, drv_status;
316
317 drv_status = 0;
318 cam_status = DID_OK;
319 scsi_status = cp->ssss_status;
320
321 if (cp->host_flags & HF_SENSE) {
322 scsi_status = cp->sv_scsi_status;
323 resid = cp->sv_resid;
324 if (sym_verbose && cp->sv_xerr_status)
325 sym_print_xerr(cmd, cp->sv_xerr_status);
326 if (cp->host_status == HS_COMPLETE &&
327 cp->ssss_status == S_GOOD &&
328 cp->xerr_status == 0) {
329 cam_status = sym_xerr_cam_status(DID_OK,
330 cp->sv_xerr_status);
331 drv_status = DRIVER_SENSE;
332 /*
333 * Bounce back the sense data to user.
334 */
335 memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
336 memcpy(cmd->sense_buffer, cp->sns_bbuf,
337 min(sizeof(cmd->sense_buffer),
338 (size_t)SYM_SNS_BBUF_LEN));
339#if 0
340 /*
341 * If the device reports a UNIT ATTENTION condition
342 * due to a RESET condition, we should consider all
343 * disconnect CCBs for this unit as aborted.
344 */
345 if (1) {
346 u_char *p;
347 p = (u_char *) cmd->sense_data;
348 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
349 sym_clear_tasks(np, DID_ABORT,
350 cp->target,cp->lun, -1);
351 }
352#endif
353 } else {
354 /*
355 * Error return from our internal request sense. This
356 * is bad: we must clear the contingent allegiance
357 * condition otherwise the device will always return
358 * BUSY. Use a big stick.
359 */
360 sym_reset_scsi_target(np, cmd->device->id);
361 cam_status = DID_ERROR;
362 }
363 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
364 cam_status = DID_OK;
365 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
366 cam_status = DID_NO_CONNECT;
367 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
368 cam_status = DID_ERROR;
369 else { /* Extended error */
370 if (sym_verbose) {
371 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
372 cp->host_status, cp->ssss_status,
373 cp->xerr_status);
374 }
375 /*
376 * Set the most appropriate value for CAM status.
377 */
378 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
379 }
380 cmd->resid = resid;
381 cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
382}
383
384
385/*
386 * Build the scatter/gather array for an I/O.
387 */
388
389static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
390{
391 struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
392 int segment;
53222b90 393 unsigned int len = cmd->request_bufflen;
1da177e4 394
53222b90 395 if (len) {
1da177e4
LT		 396 dma_addr_t baddr = map_scsi_single_data(np, cmd);
397 if (baddr) {
53222b90
MW		 398 if (len & 1) {
399 struct sym_tcb *tp = &np->target[cp->target];
400 if (tp->head.wval & EWS) {
401 len++;
402 cp->odd_byte_adjustment++;
403 }
404 }
405 cp->data_len = len;
406 sym_build_sge(np, data, baddr, len);
1da177e4
LT		 407 segment = 1;
408 } else {
409 segment = -2;
410 }
411 } else {
412 segment = 0;
413 }
414
415 return segment;
416}
417
418static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
419{
420 int segment;
421 int use_sg = (int) cmd->use_sg;
422
423 cp->data_len = 0;
424
425 if (!use_sg)
426 segment = sym_scatter_no_sglist(np, cp, cmd);
427 else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
428 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
53222b90 429 struct sym_tcb *tp = &np->target[cp->target];
1da177e4
LT		 430 struct sym_tblmove *data;
431
432 if (use_sg > SYM_CONF_MAX_SG) {
433 unmap_scsi_data(np, cmd);
434 return -1;
435 }
436
437 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
438
439 for (segment = 0; segment < use_sg; segment++) {
440 dma_addr_t baddr = sg_dma_address(&scatter[segment]);
441 unsigned int len = sg_dma_len(&scatter[segment]);
442
53222b90
MW		 443 if ((len & 1) && (tp->head.wval & EWS)) {
444 len++;
445 cp->odd_byte_adjustment++;
446 }
447
1da177e4
LT		 448 sym_build_sge(np, &data[segment], baddr, len);
449 cp->data_len += len;
450 }
451 } else {
452 segment = -2;
453 }
454
455 return segment;
456}
457
458/*
459 * Queue a SCSI command.
460 */
461static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
462{
463 struct scsi_device *sdev = cmd->device;
464 struct sym_tcb *tp;
465 struct sym_lcb *lp;
466 struct sym_ccb *cp;
467 int order;
468
469 /*
470 * Minimal checkings, so that we will not
471 * go outside our tables.
472 */
53222b90
MW		 473 if (sdev->id == np->myaddr) {
474 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
1da177e4
LT		 475 return 0;
476 }
477
478 /*
479 * Retrieve the target descriptor.
480 */
481 tp = &np->target[sdev->id];
482
1da177e4
LT		 483 /*
484 * Select tagged/untagged.
485 */
486 lp = sym_lp(tp, sdev->lun);
487 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
488
489 /*
490 * Queue the SCSI IO.
491 */
492 cp = sym_get_ccb(np, cmd, order);
493 if (!cp)
494 return 1; /* Means resource shortage */
495 sym_queue_scsiio(np, cmd, cp);
496 return 0;
497}
498
499/*
500 * Setup buffers and pointers that address the CDB.
501 */
502static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
503{
1da177e4 504 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
1da177e4 505
53222b90
MW		 506 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
507 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
1da177e4
LT		 508
509 return 0;
510}
511
512/*
513 * Setup pointers that address the data and start the I/O.
514 */
515int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
516{
517 int dir;
518 struct sym_tcb *tp = &np->target[cp->target];
519 struct sym_lcb *lp = sym_lp(tp, cp->lun);
520
521 /*
522 * Build the CDB.
523 */
524 if (sym_setup_cdb(np, cmd, cp))
525 goto out_abort;
526
527 /*
528 * No direction means no data.
529 */
530 dir = cmd->sc_data_direction;
531 if (dir != DMA_NONE) {
532 cp->segments = sym_scatter(np, cp, cmd);
533 if (cp->segments < 0) {
53222b90 534 sym_set_cam_status(cmd, DID_ERROR);
1da177e4
LT		 535 goto out_abort;
536 }
537 } else {
538 cp->data_len = 0;
539 cp->segments = 0;
540 }
541
542 /*
543 * Set data pointers.
544 */
545 sym_setup_data_pointers(np, cp, dir);
546
547 /*
548 * When `#ifed 1', the code below makes the driver
549 * panic on the first attempt to write to a SCSI device.
550 * It is the first test we want to do after a driver
551 * change that does not seem obviously safe. :)
552 */
553#if 0
554 switch (cp->cdb_buf[0]) {
555 case 0x0A: case 0x2A: case 0xAA:
556 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
557 break;
558 default:
559 break;
560 }
561#endif
562
563 /*
564 * activate this job.
565 */
566 if (lp)
567 sym_start_next_ccbs(np, lp, 2);
568 else
569 sym_put_start_queue(np, cp);
570 return 0;
571
572out_abort:
573 sym_free_ccb(np, cp);
574 sym_xpt_done(np, cmd);
575 return 0;
576}
577
578
579/*
580 * timer daemon.
581 *
582 * Misused to keep the driver running when
583 * interrupts are not configured correctly.
584 */
585static void sym_timer(struct sym_hcb *np)
586{
587 unsigned long thistime = jiffies;
588
589 /*
590 * Restart the timer.
591 */
592 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
593 add_timer(&np->s.timer);
594
595 /*
596 * If we are resetting the ncr, wait for settle_time before
597 * clearing it. Then command processing will be resumed.
598 */
599 if (np->s.settle_time_valid) {
600 if (time_before_eq(np->s.settle_time, thistime)) {
601 if (sym_verbose >= 2 )
602 printk("%s: command processing resumed\n",
603 sym_name(np));
604 np->s.settle_time_valid = 0;
605 }
606 return;
607 }
608
609 /*
610 * Nothing to do for now, but that may come.
611 */
612 if (np->s.lasttime + 4*HZ < thistime) {
613 np->s.lasttime = thistime;
614 }
615
616#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
617 /*
618 * Some way-broken PCI bridges may lead to
619 * completions being lost when the clearing
620 * of the INTFLY flag by the CPU occurs
621 * concurrently with the chip raising this flag.
622 * If this ever happen, lost completions will
623 * be reaped here.
624 */
625 sym_wakeup_done(np);
626#endif
627}
628
629
630/*
631 * PCI BUS error handler.
632 */
633void sym_log_bus_error(struct sym_hcb *np)
634{
635 u_short pci_sts;
636 pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
637 if (pci_sts & 0xf900) {
638 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
639 printf("%s: PCI STATUS = 0x%04x\n",
640 sym_name(np), pci_sts & 0xf900);
641 }
642}
643
644/*
645 * queuecommand method. Entered with the host adapter lock held and
646 * interrupts disabled.
647 */
648static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
649 void (*done)(struct scsi_cmnd *))
650{
651 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
652 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
653 int sts = 0;
654
655 cmd->scsi_done = done;
656 memset(ucp, 0, sizeof(*ucp));
657
658 /*
659 * Shorten our settle_time if needed for
660 * this command not to time out.
661 */
662 if (np->s.settle_time_valid && cmd->timeout_per_command) {
663 unsigned long tlimit = jiffies + cmd->timeout_per_command;
664 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
665 if (time_after(np->s.settle_time, tlimit)) {
666 np->s.settle_time = tlimit;
667 }
668 }
669
670 if (np->s.settle_time_valid)
671 return SCSI_MLQUEUE_HOST_BUSY;
672
673 sts = sym_queue_command(np, cmd);
674 if (sts)
675 return SCSI_MLQUEUE_HOST_BUSY;
676 return 0;
677}
678
679/*
680 * Linux entry point of the interrupt handler.
681 */
682static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
683{
684 unsigned long flags;
685 struct sym_hcb *np = (struct sym_hcb *)dev_id;
686
687 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
688
689 spin_lock_irqsave(np->s.host->host_lock, flags);
690 sym_interrupt(np);
691 spin_unlock_irqrestore(np->s.host->host_lock, flags);
692
693 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
694
695 return IRQ_HANDLED;
696}
697
698/*
699 * Linux entry point of the timer handler
700 */
701static void sym53c8xx_timer(unsigned long npref)
702{
703 struct sym_hcb *np = (struct sym_hcb *)npref;
704 unsigned long flags;
705
706 spin_lock_irqsave(np->s.host->host_lock, flags);
707 sym_timer(np);
708 spin_unlock_irqrestore(np->s.host->host_lock, flags);
709}
710
711
712/*
713 * What the eh thread wants us to perform.
714 */
715#define SYM_EH_ABORT 0
716#define SYM_EH_DEVICE_RESET 1
717#define SYM_EH_BUS_RESET 2
718#define SYM_EH_HOST_RESET 3
719
720/*
721 * What we will do regarding the involved SCSI command.
722 */
723#define SYM_EH_DO_IGNORE 0
724#define SYM_EH_DO_COMPLETE 1
725#define SYM_EH_DO_WAIT 2
726
727/*
728 * Our general completion handler.
729 */
730static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
731{
732 struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
733 if (!ep)
734 return;
735
736 /* Try to avoid a race here (not 100% safe) */
737 if (!timed_out) {
738 ep->timed_out = 0;
739 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
740 return;
741 }
742
743 /* Revert everything */
744 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
745 cmd->scsi_done = ep->old_done;
746
747 /* Wake up the eh thread if it wants to sleep */
748 if (ep->to_do == SYM_EH_DO_WAIT)
749 complete(&ep->done);
750}
751
752/*
753 * scsi_done() alias when error recovery is in progress.
754 */
755static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
756
757/*
758 * Some timeout handler to avoid waiting too long.
759 */
760static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
761
762/*
763 * Generic method for our eh processing.
764 * The 'op' argument tells what we have to do.
765 */
766static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
767{
768 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
769 SYM_QUEHEAD *qp;
770 int to_do = SYM_EH_DO_IGNORE;
771 int sts = -1;
772 struct sym_eh_wait eh, *ep = &eh;
773
774 dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
775
1da177e4
LT		 776 /* This one is queued in some place -> to wait for completion */
777 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
778 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
779 if (cp->cmd == cmd) {
780 to_do = SYM_EH_DO_WAIT;
781 goto prepare;
782 }
783 }
784
785prepare:
786 /* Prepare stuff to either ignore, complete or wait for completion */
787 switch(to_do) {
788 default:
789 case SYM_EH_DO_IGNORE:
790 break;
791 case SYM_EH_DO_WAIT:
792 init_completion(&ep->done);
793 /* fall through */
794 case SYM_EH_DO_COMPLETE:
795 ep->old_done = cmd->scsi_done;
796 cmd->scsi_done = sym_eh_done;
797 SYM_UCMD_PTR(cmd)->eh_wait = ep;
798 }
799
800 /* Try to proceed the operation we have been asked for */
801 sts = -1;
802 switch(op) {
803 case SYM_EH_ABORT:
804 sts = sym_abort_scsiio(np, cmd, 1);
805 break;
806 case SYM_EH_DEVICE_RESET:
807 sts = sym_reset_scsi_target(np, cmd->device->id);
808 break;
809 case SYM_EH_BUS_RESET:
810 sym_reset_scsi_bus(np, 1);
811 sts = 0;
812 break;
813 case SYM_EH_HOST_RESET:
814 sym_reset_scsi_bus(np, 0);
815 sym_start_up (np, 1);
816 sts = 0;
817 break;
818 default:
819 break;
820 }
821
822 /* On error, restore everything and cross fingers :) */
823 if (sts) {
824 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
825 cmd->scsi_done = ep->old_done;
826 to_do = SYM_EH_DO_IGNORE;
827 }
828
829 ep->to_do = to_do;
830 /* Complete the command with locks held as required by the driver */
831 if (to_do == SYM_EH_DO_COMPLETE)
53222b90 832 sym_xpt_done2(np, cmd, DID_ABORT);
1da177e4
LT		 833
834 /* Wait for completion with locks released, as required by kernel */
835 if (to_do == SYM_EH_DO_WAIT) {
836 init_timer(&ep->timer);
837 ep->timer.expires = jiffies + (5*HZ);
838 ep->timer.function = sym_eh_timeout;
839 ep->timer.data = (u_long)cmd;
840 ep->timed_out = 1; /* Be pessimistic for once :) */
841 add_timer(&ep->timer);
842 spin_unlock_irq(np->s.host->host_lock);
843 wait_for_completion(&ep->done);
844 spin_lock_irq(np->s.host->host_lock);
845 if (ep->timed_out)
846 sts = -2;
847 }
848 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
849 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
850 return sts ? SCSI_FAILED : SCSI_SUCCESS;
851}
852
853
854/*
855 * Error handlers called from the eh thread (one thread per HBA).
856 */
857static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
858{
8fa728a2
JG		 859 int rc;
860
861 spin_lock_irq(cmd->device->host->host_lock);
862 rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
863 spin_unlock_irq(cmd->device->host->host_lock);
864
865 return rc;
1da177e4
LT		 866}
867
868static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
869{
94d0e7b8
JG		 870 int rc;
871
872 spin_lock_irq(cmd->device->host->host_lock);
873 rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
874 spin_unlock_irq(cmd->device->host->host_lock);
875
876 return rc;
1da177e4
LT		 877}
878
879static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
880{
881 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
882}
883
884static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
885{
886 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
887}
888
889/*
890 * Tune device queuing depth, according to various limits.
891 */
892static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
893{
894 struct sym_lcb *lp = sym_lp(tp, lun);
895 u_short oldtags;
896
897 if (!lp)
898 return;
899
900 oldtags = lp->s.reqtags;
901
902 if (reqtags > lp->s.scdev_depth)
903 reqtags = lp->s.scdev_depth;
904
905 lp->started_limit = reqtags ? reqtags : 2;
906 lp->started_max = 1;
907 lp->s.reqtags = reqtags;
908
909 if (reqtags != oldtags) {
53222b90 910 dev_info(&tp->starget->dev,
1da177e4
LT		 911 "tagged command queuing %s, command queue depth %d.\n",
912 lp->s.reqtags ? "enabled" : "disabled",
913 lp->started_limit);
914 }
915}
916
917/*
918 * Linux select queue depths function
919 */
920#define DEF_DEPTH (sym_driver_setup.max_tag)
921#define ALL_TARGETS -2
922#define NO_TARGET -1
923#define ALL_LUNS -2
924#define NO_LUN -1
925
926static int device_queue_depth(struct sym_hcb *np, int target, int lun)
927{
928 int c, h, t, u, v;
929 char *p = sym_driver_setup.tag_ctrl;
930 char *ep;
931
932 h = -1;
933 t = NO_TARGET;
934 u = NO_LUN;
935 while ((c = *p++) != 0) {
936 v = simple_strtoul(p, &ep, 0);
937 switch(c) {
938 case '/':
939 ++h;
940 t = ALL_TARGETS;
941 u = ALL_LUNS;
942 break;
943 case 't':
944 if (t != target)
945 t = (target == v) ? v : NO_TARGET;
946 u = ALL_LUNS;
947 break;
948 case 'u':
949 if (u != lun)
950 u = (lun == v) ? v : NO_LUN;
951 break;
952 case 'q':
953 if (h == np->s.unit &&
954 (t == ALL_TARGETS || t == target) &&
955 (u == ALL_LUNS || u == lun))
956 return v;
957 break;
958 case '-':
959 t = ALL_TARGETS;
960 u = ALL_LUNS;
961 break;
962 default:
963 break;
964 }
965 p = ep;
966 }
967 return DEF_DEPTH;
968}
969
53222b90 970static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
1da177e4 971{
53222b90
MW		 972 struct sym_hcb *np;
973 struct sym_tcb *tp;
1da177e4 974
53222b90
MW		 975 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
976 return -ENXIO;
1da177e4 977
53222b90
MW		 978 np = sym_get_hcb(sdev->host);
979 tp = &np->target[sdev->id];
980
981 /*
982 * Fail the device init if the device is flagged NOSCAN at BOOT in
983 * the NVRAM. This may speed up boot and maintain coherency with
984 * BIOS device numbering. Clearing the flag allows the user to
985 * rescan skipped devices later. We also return an error for
986 * devices not flagged for SCAN LUNS in the NVRAM since some single
987 * lun devices behave badly when asked for a non zero LUN.
988 */
989
990 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
991 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
992 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
993 return -ENXIO;
994 }
995
996 tp->starget = sdev->sdev_target;
997 return 0;
1da177e4
LT		 998}
999
1000/*
1001 * Linux entry point for device queue sizing.
1002 */
1003static int sym53c8xx_slave_configure(struct scsi_device *device)
1004{
1005 struct sym_hcb *np = sym_get_hcb(device->host);
1006 struct sym_tcb *tp = &np->target[device->id];
1007 struct sym_lcb *lp;
1008 int reqtags, depth_to_use;
1009
1010 /*
1011 * Allocate the LCB if not yet.
1012 * If it fail, we may well be in the sh*t. :)
1013 */
1014 lp = sym_alloc_lcb(np, device->id, device->lun);
1015 if (!lp)
1016 return -ENOMEM;
1017
1018 /*
1019 * Get user flags.
1020 */
1021 lp->curr_flags = lp->user_flags;
1022
1023 /*
1024 * Select queue depth from driver setup.
1025 * Donnot use more than configured by user.
1026 * Use at least 2.
1027 * Donnot use more than our maximum.
1028 */
1029 reqtags = device_queue_depth(np, device->id, device->lun);
1030 if (reqtags > tp->usrtags)
1031 reqtags = tp->usrtags;
1032 if (!device->tagged_supported)
1033 reqtags = 0;
1034#if 1 /* Avoid to locally queue commands for no good reasons */
1035 if (reqtags > SYM_CONF_MAX_TAG)
1036 reqtags = SYM_CONF_MAX_TAG;
1037 depth_to_use = (reqtags ? reqtags : 2);
1038#else
1039 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1040#endif
1041 scsi_adjust_queue_depth(device,
1042 (device->tagged_supported ?
1043 MSG_SIMPLE_TAG : 0),
1044 depth_to_use);
1045 lp->s.scdev_depth = depth_to_use;
1046 sym_tune_dev_queuing(tp, device->lun, reqtags);
1047
1048 if (!spi_initial_dv(device->sdev_target))
1049 spi_dv_device(device);
1050
1051 return 0;
1052}
1053
1054/*
1055 * Linux entry point for info() function
1056 */
1057static const char *sym53c8xx_info (struct Scsi_Host *host)
1058{
1059 return SYM_DRIVER_NAME;
1060}
1061
1062
1063#ifdef SYM_LINUX_PROC_INFO_SUPPORT
1064/*
1065 * Proc file system stuff
1066 *
1067 * A read operation returns adapter information.
1068 * A write operation is a control command.
1069 * The string is parsed in the driver code and the command is passed
1070 * to the sym_usercmd() function.
1071 */
1072
1073#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1074
1075struct sym_usrcmd {
1076 u_long target;
1077 u_long lun;
1078 u_long data;
1079 u_long cmd;
1080};
1081
1082#define UC_SETSYNC 10
1083#define UC_SETTAGS 11
1084#define UC_SETDEBUG 12
1085#define UC_SETWIDE 14
1086#define UC_SETFLAG 15
1087#define UC_SETVERBOSE 17
1088#define UC_RESETDEV 18
1089#define UC_CLEARDEV 19
1090
1091static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1092{
1093 struct sym_tcb *tp;
1094 int t, l;
1095
1096 switch (uc->cmd) {
1097 case 0: return;
1098
1099#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1100 case UC_SETDEBUG:
1101 sym_debug_flags = uc->data;
1102 break;
1103#endif
1104 case UC_SETVERBOSE:
1105 np->verbose = uc->data;
1106 break;
1107 default:
1108 /*
1109 * We assume that other commands apply to targets.
1110 * This should always be the case and avoid the below
1111 * 4 lines to be repeated 6 times.
1112 */
1113 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1114 if (!((uc->target >> t) & 1))
1115 continue;
1116 tp = &np->target[t];
1117
1118 switch (uc->cmd) {
1119
1120 case UC_SETSYNC:
1121 if (!uc->data || uc->data >= 255) {
1122 tp->tgoal.iu = tp->tgoal.dt =
1123 tp->tgoal.qas = 0;
1124 tp->tgoal.offset = 0;
1125 } else if (uc->data <= 9 && np->minsync_dt) {
1126 if (uc->data < np->minsync_dt)
1127 uc->data = np->minsync_dt;
1128 tp->tgoal.iu = tp->tgoal.dt =
1129 tp->tgoal.qas = 1;
1130 tp->tgoal.width = 1;
1131 tp->tgoal.period = uc->data;
1132 tp->tgoal.offset = np->maxoffs_dt;
1133 } else {
1134 if (uc->data < np->minsync)
1135 uc->data = np->minsync;
1136 tp->tgoal.iu = tp->tgoal.dt =
1137 tp->tgoal.qas = 0;
1138 tp->tgoal.period = uc->data;
1139 tp->tgoal.offset = np->maxoffs;
1140 }
1141 tp->tgoal.check_nego = 1;
1142 break;
1143 case UC_SETWIDE:
1144 tp->tgoal.width = uc->data ? 1 : 0;
1145 tp->tgoal.check_nego = 1;
1146 break;
1147 case UC_SETTAGS:
1148 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1149 sym_tune_dev_queuing(tp, l, uc->data);
1150 break;
1151 case UC_RESETDEV:
1152 tp->to_reset = 1;
1153 np->istat_sem = SEM;
1154 OUTB(np, nc_istat, SIGP|SEM);
1155 break;
1156 case UC_CLEARDEV:
1157 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1158 struct sym_lcb *lp = sym_lp(tp, l);
1159 if (lp) lp->to_clear = 1;
1160 }
1161 np->istat_sem = SEM;
1162 OUTB(np, nc_istat, SIGP|SEM);
1163 break;
1164 case UC_SETFLAG:
1165 tp->usrflags = uc->data;
1166 break;
1167 }
1168 }
1169 break;
1170 }
1171}
1172
1173static int skip_spaces(char *ptr, int len)
1174{
1175 int cnt, c;
1176
1177 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1178
1179 return (len - cnt);
1180}
1181
1182static int get_int_arg(char *ptr, int len, u_long *pv)
1183{
1184 char *end;
1185
1186 *pv = simple_strtoul(ptr, &end, 10);
1187 return (end - ptr);
1188}
1189
1190static int is_keyword(char *ptr, int len, char *verb)
1191{
1192 int verb_len = strlen(verb);
1193
1194 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1195 return verb_len;
1196 else
1197 return 0;
1198}
1199
1200#define SKIP_SPACES(ptr, len) \
1201 if ((arg_len = skip_spaces(ptr, len)) < 1) \
1202 return -EINVAL; \
1203 ptr += arg_len; len -= arg_len;
1204
1205#define GET_INT_ARG(ptr, len, v) \
1206 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1207 return -EINVAL; \
1208 ptr += arg_len; len -= arg_len;
1209
1210
1211/*
1212 * Parse a control command
1213 */
1214
1215static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1216{
1217 char *ptr = buffer;
1218 int len = length;
1219 struct sym_usrcmd cmd, *uc = &cmd;
1220 int arg_len;
1221 u_long target;
1222
1223 memset(uc, 0, sizeof(*uc));
1224
1225 if (len > 0 && ptr[len-1] == '\n')
1226 --len;
1227
1228 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1229 uc->cmd = UC_SETSYNC;
1230 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1231 uc->cmd = UC_SETTAGS;
1232 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1233 uc->cmd = UC_SETVERBOSE;
1234 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1235 uc->cmd = UC_SETWIDE;
1236#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1237 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1238 uc->cmd = UC_SETDEBUG;
1239#endif
1240 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1241 uc->cmd = UC_SETFLAG;
1242 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1243 uc->cmd = UC_RESETDEV;
1244 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1245 uc->cmd = UC_CLEARDEV;
1246 else
1247 arg_len = 0;
1248
1249#ifdef DEBUG_PROC_INFO
1250printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1251#endif
1252
1253 if (!arg_len)
1254 return -EINVAL;
1255 ptr += arg_len; len -= arg_len;
1256
1257 switch(uc->cmd) {
1258 case UC_SETSYNC:
1259 case UC_SETTAGS:
1260 case UC_SETWIDE:
1261 case UC_SETFLAG:
1262 case UC_RESETDEV:
1263 case UC_CLEARDEV:
1264 SKIP_SPACES(ptr, len);
1265 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1266 ptr += arg_len; len -= arg_len;
1267 uc->target = ~0;
1268 } else {
1269 GET_INT_ARG(ptr, len, target);
1270 uc->target = (1<<target);
1271#ifdef DEBUG_PROC_INFO
1272printk("sym_user_command: target=%ld\n", target);
1273#endif
1274 }
1275 break;
1276 }
1277
1278 switch(uc->cmd) {
1279 case UC_SETVERBOSE:
1280 case UC_SETSYNC:
1281 case UC_SETTAGS:
1282 case UC_SETWIDE:
1283 SKIP_SPACES(ptr, len);
1284 GET_INT_ARG(ptr, len, uc->data);
1285#ifdef DEBUG_PROC_INFO
1286printk("sym_user_command: data=%ld\n", uc->data);
1287#endif
1288 break;
1289#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1290 case UC_SETDEBUG:
1291 while (len > 0) {
1292 SKIP_SPACES(ptr, len);
1293 if ((arg_len = is_keyword(ptr, len, "alloc")))
1294 uc->data |= DEBUG_ALLOC;
1295 else if ((arg_len = is_keyword(ptr, len, "phase")))
1296 uc->data |= DEBUG_PHASE;
1297 else if ((arg_len = is_keyword(ptr, len, "queue")))
1298 uc->data |= DEBUG_QUEUE;
1299 else if ((arg_len = is_keyword(ptr, len, "result")))
1300 uc->data |= DEBUG_RESULT;
1301 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1302 uc->data |= DEBUG_SCATTER;
1303 else if ((arg_len = is_keyword(ptr, len, "script")))
1304 uc->data |= DEBUG_SCRIPT;
1305 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1306 uc->data |= DEBUG_TINY;
1307 else if ((arg_len = is_keyword(ptr, len, "timing")))
1308 uc->data |= DEBUG_TIMING;
1309 else if ((arg_len = is_keyword(ptr, len, "nego")))
1310 uc->data |= DEBUG_NEGO;
1311 else if ((arg_len = is_keyword(ptr, len, "tags")))
1312 uc->data |= DEBUG_TAGS;
1313 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1314 uc->data |= DEBUG_POINTER;
1315 else
1316 return -EINVAL;
1317 ptr += arg_len; len -= arg_len;
1318 }
1319#ifdef DEBUG_PROC_INFO
1320printk("sym_user_command: data=%ld\n", uc->data);
1321#endif
1322 break;
1323#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1324 case UC_SETFLAG:
1325 while (len > 0) {
1326 SKIP_SPACES(ptr, len);
1327 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1328 uc->data &= ~SYM_DISC_ENABLED;
1329 else
1330 return -EINVAL;
1331 ptr += arg_len; len -= arg_len;
1332 }
1333 break;
1334 default:
1335 break;
1336 }
1337
1338 if (len)
1339 return -EINVAL;
1340 else {
1341 unsigned long flags;
1342
1343 spin_lock_irqsave(np->s.host->host_lock, flags);
1344 sym_exec_user_command (np, uc);
1345 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1346 }
1347 return length;
1348}
1349
1350#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1351
1352
1353#ifdef SYM_LINUX_USER_INFO_SUPPORT
1354/*
1355 * Informations through the proc file system.
1356 */
1357struct info_str {
1358 char *buffer;
1359 int length;
1360 int offset;
1361 int pos;
1362};
1363
1364static void copy_mem_info(struct info_str *info, char *data, int len)
1365{
1366 if (info->pos + len > info->length)
1367 len = info->length - info->pos;
1368
1369 if (info->pos + len < info->offset) {
1370 info->pos += len;
1371 return;
1372 }
1373 if (info->pos < info->offset) {
1374 data += (info->offset - info->pos);
1375 len -= (info->offset - info->pos);
1376 }
1377
1378 if (len > 0) {
1379 memcpy(info->buffer + info->pos, data, len);
1380 info->pos += len;
1381 }
1382}
1383
1384static int copy_info(struct info_str *info, char *fmt, ...)
1385{
1386 va_list args;
1387 char buf[81];
1388 int len;
1389
1390 va_start(args, fmt);
1391 len = vsprintf(buf, fmt, args);
1392 va_end(args);
1393
1394 copy_mem_info(info, buf, len);
1395 return len;
1396}
1397
1398/*
1399 * Copy formatted information into the input buffer.
1400 */
1401static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1402{
1403 struct info_str info;
1404
1405 info.buffer = ptr;
1406 info.length = len;
1407 info.offset = offset;
1408 info.pos = 0;
1409
1410 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1411 "revision id 0x%x\n",
1412 np->s.chip_name, np->device_id, np->revision_id);
1413 copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1414 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1415 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1416 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1417 np->maxwide ? "Wide" : "Narrow",
1418 np->minsync_dt ? ", DT capable" : "");
1419
1420 copy_info(&info, "Max. started commands %d, "
1421 "max. commands per LUN %d\n",
1422 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1423
1424 return info.pos > info.offset? info.pos - info.offset : 0;
1425}
1426#endif /* SYM_LINUX_USER_INFO_SUPPORT */
1427
1428/*
1429 * Entry point of the scsi proc fs of the driver.
1430 * - func = 0 means read (returns adapter infos)
1431 * - func = 1 means write (not yet merget from sym53c8xx)
1432 */
1433static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1434 char **start, off_t offset, int length, int func)
1435{
1436 struct sym_hcb *np = sym_get_hcb(host);
1437 int retv;
1438
1439 if (func) {
1440#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1441 retv = sym_user_command(np, buffer, length);
1442#else
1443 retv = -EINVAL;
1444#endif
1445 } else {
1446 if (start)
1447 *start = buffer;
1448#ifdef SYM_LINUX_USER_INFO_SUPPORT
1449 retv = sym_host_info(np, buffer, offset, length);
1450#else
1451 retv = -EINVAL;
1452#endif
1453 }
1454
1455 return retv;
1456}
1457#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1458
1459/*
1460 * Free controller resources.
1461 */
1462static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1463{
1464 /*
1465 * Free O/S specific resources.
1466 */
1467 if (np->s.irq)
1468 free_irq(np->s.irq, np);
1469 if (np->s.ioaddr)
1470 pci_iounmap(pdev, np->s.ioaddr);
1471 if (np->s.ramaddr)
1472 pci_iounmap(pdev, np->s.ramaddr);
1473 /*
1474 * Free O/S independent resources.
1475 */
1476 sym_hcb_free(np);
1477
1478 sym_mfree_dma(np, sizeof(*np), "HCB");
1479}
1480
1481/*
1482 * Ask/tell the system about DMA addressing.
1483 */
1484static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1485{
1486#if SYM_CONF_DMA_ADDRESSING_MODE > 0
1487#if SYM_CONF_DMA_ADDRESSING_MODE == 1
1488#define DMA_DAC_MASK 0x000000ffffffffffULL /* 40-bit */
1489#elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1490#define DMA_DAC_MASK DMA_64BIT_MASK
1491#endif
1492 if ((np->features & FE_DAC) &&
1493 !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1494 np->use_dac = 1;
1495 return 0;
1496 }
1497#endif
1498
1499 if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1500 return 0;
1501
1502 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1503 return -1;
1504}
1505
1506/*
1507 * Host attach and initialisations.
1508 *
1509 * Allocate host data and ncb structure.
1510 * Remap MMIO region.
1511 * Do chip initialization.
1512 * If all is OK, install interrupt handling and
1513 * start the timer daemon.
1514 */
1515static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1516 int unit, struct sym_device *dev)
1517{
1518 struct host_data *host_data;
1519 struct sym_hcb *np = NULL;
1520 struct Scsi_Host *instance = NULL;
1521 struct pci_dev *pdev = dev->pdev;
1522 unsigned long flags;
1523 struct sym_fw *fw;
1524
1525 printk(KERN_INFO
1526 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1527 unit, dev->chip.name, dev->chip.revision_id,
1528 pci_name(pdev), IRQ_PRM(pdev->irq));
1529
1530 /*
1531 * Get the firmware for this chip.
1532 */
1533 fw = sym_find_firmware(&dev->chip);
1534 if (!fw)
1535 goto attach_failed;
1536
1537 /*
1538 * Allocate host_data structure
1539 */
1540 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1541 if (!instance)
1542 goto attach_failed;
1543 host_data = (struct host_data *) instance->hostdata;
1544
1545 /*
1546 * Allocate immediately the host control block,
1547 * since we are only expecting to succeed. :)
1548 * We keep track in the HCB of all the resources that
1549 * are to be released on error.
1550 */
1551 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1552 if (!np)
1553 goto attach_failed;
1554 np->s.device = pdev;
1555 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1556 host_data->ncb = np;
1557 np->s.host = instance;
1558
1559 pci_set_drvdata(pdev, np);
1560
1561 /*
1562 * Copy some useful infos to the HCB.
1563 */
1564 np->hcb_ba = vtobus(np);
1565 np->verbose = sym_driver_setup.verbose;
1566 np->s.device = pdev;
1567 np->s.unit = unit;
1568 np->device_id = dev->chip.device_id;
1569 np->revision_id = dev->chip.revision_id;
1570 np->features = dev->chip.features;
1571 np->clock_divn = dev->chip.nr_divisor;
1572 np->maxoffs = dev->chip.offset_max;
1573 np->maxburst = dev->chip.burst_max;
1574 np->myaddr = dev->host_id;
1575
1576 /*
1577 * Edit its name.
1578 */
1579 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1580 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1581
1582 if (sym_setup_bus_dma_mask(np))
1583 goto attach_failed;
1584
1585 /*
1586 * Try to map the controller chip to
1587 * virtual and physical memory.
1588 */
1589 np->mmio_ba = (u32)dev->mmio_base;
1590 np->s.ioaddr = dev->s.ioaddr;
1591 np->s.ramaddr = dev->s.ramaddr;
1592 np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1593
1594 /*
1595 * Map on-chip RAM if present and supported.
1596 */
1597 if (!(np->features & FE_RAM))
1598 dev->ram_base = 0;
1599 if (dev->ram_base) {
1600 np->ram_ba = (u32)dev->ram_base;
1601 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1602 }
1603
1604 if (sym_hcb_attach(instance, fw, dev->nvram))
1605 goto attach_failed;
1606
1607 /*
1608 * Install the interrupt handler.
1609 * If we synchonize the C code with SCRIPTS on interrupt,
1610 * we do not want to share the INTR line at all.
1611 */
1612 if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1613 printf_err("%s: request irq %d failure\n",
1614 sym_name(np), pdev->irq);
1615 goto attach_failed;
1616 }
1617 np->s.irq = pdev->irq;
1618
1619 /*
1620 * After SCSI devices have been opened, we cannot
1621 * reset the bus safely, so we do it here.
1622 */
1623 spin_lock_irqsave(instance->host_lock, flags);
1624 if (sym_reset_scsi_bus(np, 0))
1625 goto reset_failed;
1626
1627 /*
1628 * Start the SCRIPTS.
1629 */
1630 sym_start_up (np, 1);
1631
1632 /*
1633 * Start the timer daemon
1634 */
1635 init_timer(&np->s.timer);
1636 np->s.timer.data = (unsigned long) np;
1637 np->s.timer.function = sym53c8xx_timer;
1638 np->s.lasttime=0;
1639 sym_timer (np);
1640
1641 /*
1642 * Fill Linux host instance structure
1643 * and return success.
1644 */
1645 instance->max_channel = 0;
1646 instance->this_id = np->myaddr;
1647 instance->max_id = np->maxwide ? 16 : 8;
1648 instance->max_lun = SYM_CONF_MAX_LUN;
1649 instance->unique_id = pci_resource_start(pdev, 0);
1650 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
1651 instance->can_queue = (SYM_CONF_MAX_START-2);
1652 instance->sg_tablesize = SYM_CONF_MAX_SG;
1653 instance->max_cmd_len = 16;
1654 BUG_ON(sym2_transport_template == NULL);
1655 instance->transportt = sym2_transport_template;
1656
1657 spin_unlock_irqrestore(instance->host_lock, flags);
1658
1659 return instance;
1660
1661 reset_failed:
1662 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1663 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1664 spin_unlock_irqrestore(instance->host_lock, flags);
1665 attach_failed:
1666 if (!instance)
1667 return NULL;
1668 printf_info("%s: giving up ...\n", sym_name(np));
1669 if (np)
1670 sym_free_resources(np, pdev);
1671 scsi_host_put(instance);
1672
1673 return NULL;
1674 }
1675
1676
1677/*
1678 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1679 */
1680#if SYM_CONF_NVRAM_SUPPORT
1681static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1682{
1683 devp->nvram = nvp;
1684 devp->device_id = devp->chip.device_id;
1685 nvp->type = 0;
1686
1687 sym_read_nvram(devp, nvp);
1688}
1689#else
1690static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1691{
1692}
1693#endif /* SYM_CONF_NVRAM_SUPPORT */
1694
1695static int __devinit sym_check_supported(struct sym_device *device)
1696{
1697 struct sym_chip *chip;
1698 struct pci_dev *pdev = device->pdev;
1699 u_char revision;
1700 unsigned long io_port = pci_resource_start(pdev, 0);
1701 int i;
1702
1703 /*
1704 * If user excluded this chip, do not initialize it.
1705 * I hate this code so much. Must kill it.
1706 */
1707 if (io_port) {
1708 for (i = 0 ; i < 8 ; i++) {
1709 if (sym_driver_setup.excludes[i] == io_port)
1710 return -ENODEV;
1711 }
1712 }
1713
1714 /*
1715 * Check if the chip is supported. Then copy the chip description
1716 * to our device structure so we can make it match the actual device
1717 * and options.
1718 */
1719 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1720 chip = sym_lookup_chip_table(pdev->device, revision);
1721 if (!chip) {
1722 dev_info(&pdev->dev, "device not supported\n");
1723 return -ENODEV;
1724 }
1725 memcpy(&device->chip, chip, sizeof(device->chip));
1726 device->chip.revision_id = revision;
1727
1728 return 0;
1729}
1730
1731/*
1732 * Ignore Symbios chips controlled by various RAID controllers.
1733 * These controllers set value 0x52414944 at RAM end - 16.
1734 */
1735static int __devinit sym_check_raid(struct sym_device *device)
1736{
1737 unsigned int ram_size, ram_val;
1738
1739 if (!device->s.ramaddr)
1740 return 0;
1741
1742 if (device->chip.features & FE_RAM8K)
1743 ram_size = 8192;
1744 else
1745 ram_size = 4096;
1746
1747 ram_val = readl(device->s.ramaddr + ram_size - 16);
1748 if (ram_val != 0x52414944)
1749 return 0;
1750
1751 dev_info(&device->pdev->dev,
1752 "not initializing, driven by RAID controller.\n");
1753 return -ENODEV;
1754}
1755
1756static int __devinit sym_set_workarounds(struct sym_device *device)
1757{
1758 struct sym_chip *chip = &device->chip;
1759 struct pci_dev *pdev = device->pdev;
1760 u_short status_reg;
1761
1762 /*
1763 * (ITEM 12 of a DEL about the 896 I haven't yet).
1764 * We must ensure the chip will use WRITE AND INVALIDATE.
1765 * The revision number limit is for now arbitrary.
1766 */
1767 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1768 chip->features |= (FE_WRIE | FE_CLSE);
1769 }
1770
1771 /* If the chip can do Memory Write Invalidate, enable it */
1772 if (chip->features & FE_WRIE) {
1773 if (pci_set_mwi(pdev))
1774 return -ENODEV;
1775 }
1776
1777 /*
1778 * Work around for errant bit in 895A. The 66Mhz
1779 * capable bit is set erroneously. Clear this bit.
1780 * (Item 1 DEL 533)
1781 *
1782 * Make sure Config space and Features agree.
1783 *
1784 * Recall: writes are not normal to status register -
1785 * write a 1 to clear and a 0 to leave unchanged.
1786 * Can only reset bits.
1787 */
1788 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1789 if (chip->features & FE_66MHZ) {
1790 if (!(status_reg & PCI_STATUS_66MHZ))
1791 chip->features &= ~FE_66MHZ;
1792 } else {
1793 if (status_reg & PCI_STATUS_66MHZ) {
1794 status_reg = PCI_STATUS_66MHZ;
1795 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1796 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1797 }
1798 }
1799
1800 return 0;
1801}
1802
1803/*
1804 * Read and check the PCI configuration for any detected NCR
1805 * boards and save data for attaching after all boards have
1806 * been detected.
1807 */
1808static void __devinit
1809sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1810{
1811 int i;
1812
1813 device->host_id = SYM_SETUP_HOST_ID;
1814 device->pdev = pdev;
1815
1816 i = pci_get_base_address(pdev, 1, &device->mmio_base);
1817 pci_get_base_address(pdev, i, &device->ram_base);
1818
1819#ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1820 if (device->mmio_base)
1821 device->s.ioaddr = pci_iomap(pdev, 1,
1822 pci_resource_len(pdev, 1));
1823#endif
1824 if (!device->s.ioaddr)
1825 device->s.ioaddr = pci_iomap(pdev, 0,
1826 pci_resource_len(pdev, 0));
1827 if (device->ram_base)
1828 device->s.ramaddr = pci_iomap(pdev, i,
1829 pci_resource_len(pdev, i));
1830}
1831
1832/*
1833 * The NCR PQS and PDS cards are constructed as a DEC bridge
1834 * behind which sits a proprietary NCR memory controller and
1835 * either four or two 53c875s as separate devices. We can tell
1836 * if an 875 is part of a PQS/PDS or not since if it is, it will
1837 * be on the same bus as the memory controller. In its usual
1838 * mode of operation, the 875s are slaved to the memory
1839 * controller for all transfers. To operate with the Linux
1840 * driver, the memory controller is disabled and the 875s
1841 * freed to function independently. The only wrinkle is that
1842 * the preset SCSI ID (which may be zero) must be read in from
1843 * a special configuration space register of the 875.
1844 */
1845static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1846{
1847 int slot;
1848 u8 tmp;
1849
1850 for (slot = 0; slot < 256; slot++) {
1851 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1852
1853 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1854 pci_dev_put(memc);
1855 continue;
1856 }
1857
1858 /* bit 1: allow individual 875 configuration */
1859 pci_read_config_byte(memc, 0x44, &tmp);
1860 if ((tmp & 0x2) == 0) {
1861 tmp |= 0x2;
1862 pci_write_config_byte(memc, 0x44, tmp);
1863 }
1864
1865 /* bit 2: drive individual 875 interrupts to the bus */
1866 pci_read_config_byte(memc, 0x45, &tmp);
1867 if ((tmp & 0x4) == 0) {
1868 tmp |= 0x4;
1869 pci_write_config_byte(memc, 0x45, tmp);
1870 }
1871
1872 pci_dev_put(memc);
1873 break;
1874 }
1875
1876 pci_read_config_byte(pdev, 0x84, &tmp);
1877 sym_dev->host_id = tmp;
1878}
1879
1880/*
1881 * Called before unloading the module.
1882 * Detach the host.
1883 * We have to free resources and halt the NCR chip.
1884 */
1885static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1886{
1887 printk("%s: detaching ...\n", sym_name(np));
1888
1889 del_timer_sync(&np->s.timer);
1890
1891 /*
1892 * Reset NCR chip.
1893 * We should use sym_soft_reset(), but we don't want to do
1894 * so, since we may not be safe if interrupts occur.
1895 */
1896 printk("%s: resetting chip\n", sym_name(np));
1897 OUTB(np, nc_istat, SRST);
53222b90 1898 INB(np, nc_mbox1);
1da177e4
LT		 1899 udelay(10);
1900 OUTB(np, nc_istat, 0);
1901
1902 sym_free_resources(np, pdev);
1903
1904 return 1;
1905}
1906
1907/*
1908 * Driver host template.
1909 */
1910static struct scsi_host_template sym2_template = {
1911 .module = THIS_MODULE,
1912 .name = "sym53c8xx",
1913 .info = sym53c8xx_info,
1914 .queuecommand = sym53c8xx_queue_command,
1915 .slave_alloc = sym53c8xx_slave_alloc,
1916 .slave_configure = sym53c8xx_slave_configure,
1da177e4
LT		 1917 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1918 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1919 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1920 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1921 .this_id = 7,
1922 .use_clustering = DISABLE_CLUSTERING,
1923#ifdef SYM_LINUX_PROC_INFO_SUPPORT
1924 .proc_info = sym53c8xx_proc_info,
1925 .proc_name = NAME53C8XX,
1926#endif
1927};
1928
1929static int attach_count;
1930
1931static int __devinit sym2_probe(struct pci_dev *pdev,
1932 const struct pci_device_id *ent)
1933{
1934 struct sym_device sym_dev;
1935 struct sym_nvram nvram;
1936 struct Scsi_Host *instance;
1937
1938 memset(&sym_dev, 0, sizeof(sym_dev));
1939 memset(&nvram, 0, sizeof(nvram));
1940
1941 if (pci_enable_device(pdev))
1942 goto leave;
1943
1944 pci_set_master(pdev);
1945
1946 if (pci_request_regions(pdev, NAME53C8XX))
1947 goto disable;
1948
1949 sym_init_device(pdev, &sym_dev);
1950 if (sym_check_supported(&sym_dev))
1951 goto free;
1952
1953 if (sym_check_raid(&sym_dev))
1954 goto leave; /* Don't disable the device */
1955
1956 if (sym_set_workarounds(&sym_dev))
1957 goto free;
1958
1959 sym_config_pqs(pdev, &sym_dev);
1960
1961 sym_get_nvram(&sym_dev, &nvram);
1962
1963 instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1964 if (!instance)
1965 goto free;
1966
1967 if (scsi_add_host(instance, &pdev->dev))
1968 goto detach;
1969 scsi_scan_host(instance);
1970
1971 attach_count++;
1972
1973 return 0;
1974
1975 detach:
1976 sym_detach(pci_get_drvdata(pdev), pdev);
1977 free:
1978 pci_release_regions(pdev);
1979 disable:
1980 pci_disable_device(pdev);
1981 leave:
1982 return -ENODEV;
1983}
1984
1985static void __devexit sym2_remove(struct pci_dev *pdev)
1986{
1987 struct sym_hcb *np = pci_get_drvdata(pdev);
1988 struct Scsi_Host *host = np->s.host;
1989
1990 scsi_remove_host(host);
1991 scsi_host_put(host);
1992
1993 sym_detach(np, pdev);
1994
1995 pci_release_regions(pdev);
1996 pci_disable_device(pdev);
1997
1998 attach_count--;
1999}
2000
2001static void sym2_get_signalling(struct Scsi_Host *shost)
2002{
2003 struct sym_hcb *np = sym_get_hcb(shost);
2004 enum spi_signal_type type;
2005
2006 switch (np->scsi_mode) {
2007 case SMODE_SE:
2008 type = SPI_SIGNAL_SE;
2009 break;
2010 case SMODE_LVD:
2011 type = SPI_SIGNAL_LVD;
2012 break;
2013 case SMODE_HVD:
2014 type = SPI_SIGNAL_HVD;
2015 break;
2016 default:
2017 type = SPI_SIGNAL_UNKNOWN;
2018 break;
2019 }
2020 spi_signalling(shost) = type;
2021}
2022
2023static void sym2_set_offset(struct scsi_target *starget, int offset)
2024{
2025 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2026 struct sym_hcb *np = sym_get_hcb(shost);
2027 struct sym_tcb *tp = &np->target[starget->id];
2028
2029 tp->tgoal.offset = offset;
2030 tp->tgoal.check_nego = 1;
2031}
2032
2033static void sym2_set_period(struct scsi_target *starget, int period)
2034{
2035 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2036 struct sym_hcb *np = sym_get_hcb(shost);
2037 struct sym_tcb *tp = &np->target[starget->id];
2038
e4862fed
JB		 2039 /* have to have DT for these transfers, but DT will also
2040 * set width, so check that this is allowed */
2041 if (period <= np->minsync && spi_width(starget))
1da177e4
LT		 2042 tp->tgoal.dt = 1;
2043
2044 tp->tgoal.period = period;
2045 tp->tgoal.check_nego = 1;
2046}
2047
2048static void sym2_set_width(struct scsi_target *starget, int width)
2049{
2050 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2051 struct sym_hcb *np = sym_get_hcb(shost);
2052 struct sym_tcb *tp = &np->target[starget->id];
2053
2054 /* It is illegal to have DT set on narrow transfers. If DT is
2055 * clear, we must also clear IU and QAS. */
2056 if (width == 0)
2057 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2058
2059 tp->tgoal.width = width;
2060 tp->tgoal.check_nego = 1;
2061}
2062
2063static void sym2_set_dt(struct scsi_target *starget, int dt)
2064{
2065 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2066 struct sym_hcb *np = sym_get_hcb(shost);
2067 struct sym_tcb *tp = &np->target[starget->id];
2068
2069 /* We must clear QAS and IU if DT is clear */
2070 if (dt)
2071 tp->tgoal.dt = 1;
2072 else
2073 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2074 tp->tgoal.check_nego = 1;
2075}
2076
2077static void sym2_set_iu(struct scsi_target *starget, int iu)
2078{
2079 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2080 struct sym_hcb *np = sym_get_hcb(shost);
2081 struct sym_tcb *tp = &np->target[starget->id];
2082
2083 if (iu)
2084 tp->tgoal.iu = tp->tgoal.dt = 1;
2085 else
2086 tp->tgoal.iu = 0;
2087 tp->tgoal.check_nego = 1;
2088}
2089
2090static void sym2_set_qas(struct scsi_target *starget, int qas)
2091{
2092 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2093 struct sym_hcb *np = sym_get_hcb(shost);
2094 struct sym_tcb *tp = &np->target[starget->id];
2095
2096 if (qas)
2097 tp->tgoal.dt = tp->tgoal.qas = 1;
2098 else
2099 tp->tgoal.qas = 0;
2100 tp->tgoal.check_nego = 1;
2101}
2102
2103
2104static struct spi_function_template sym2_transport_functions = {
2105 .set_offset = sym2_set_offset,
2106 .show_offset = 1,
2107 .set_period = sym2_set_period,
2108 .show_period = 1,
2109 .set_width = sym2_set_width,
2110 .show_width = 1,
2111 .set_dt = sym2_set_dt,
2112 .show_dt = 1,
2113 .set_iu = sym2_set_iu,
2114 .show_iu = 1,
2115 .set_qas = sym2_set_qas,
2116 .show_qas = 1,
2117 .get_signalling = sym2_get_signalling,
2118};
2119
2120static struct pci_device_id sym2_id_table[] __devinitdata = {
2121 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2122 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2123 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2124 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2125 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2126 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2127 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2128 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2129 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2130 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2131 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2132 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2133 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2134 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2135 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2136 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2137 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2138 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2139 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2140 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2142 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2143 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2144 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2145 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2146 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2147 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2148 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2149 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2150 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2152 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2154 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155 { 0, }
2156};
2157
2158MODULE_DEVICE_TABLE(pci, sym2_id_table);
2159
2160static struct pci_driver sym2_driver = {
2161 .name = NAME53C8XX,
2162 .id_table = sym2_id_table,
2163 .probe = sym2_probe,
2164 .remove = __devexit_p(sym2_remove),
2165};
2166
2167static int __init sym2_init(void)
2168{
2169 int error;
2170
2171 sym2_setup_params();
2172 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2173 if (!sym2_transport_template)
2174 return -ENODEV;
2175
2176 error = pci_register_driver(&sym2_driver);
2177 if (error)
2178 spi_release_transport(sym2_transport_template);
2179 return error;
2180}
2181
2182static void __exit sym2_exit(void)
2183{
2184 pci_unregister_driver(&sym2_driver);
2185 spi_release_transport(sym2_transport_template);
2186}
2187
2188module_init(sym2_init);
2189module_exit(sym2_exit);
Linux kernel - Deliverables
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