1	// SPDX-License-Identifier: GPL-2.0-or-later
2	/*
3	* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
4	* of PCI-SCSI IO processors.
5	*
6	* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
7	* Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
8	*
9	* This driver is derived from the Linux sym53c8xx driver.
10	* Copyright (C) 1998-2000 Gerard Roudier
11	*
12	* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
13	* a port of the FreeBSD ncr driver to Linux-1.2.13.
14	*
15	* The original ncr driver has been written for 386bsd and FreeBSD by
16	* Wolfgang Stanglmeier <wolf@cologne.de>
17	* Stefan Esser <se@mi.Uni-Koeln.de>
18	* Copyright (C) 1994 Wolfgang Stanglmeier
19	*
20	* Other major contributions:
21	*
22	* NVRAM detection and reading.
23	* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
24	*
25	*-----------------------------------------------------------------------------
26	*/
27	#include <linux/ctype.h>
28	#include <linux/init.h>
29	#include <linux/module.h>
30	#include <linux/moduleparam.h>
31	#include <linux/spinlock.h>
32	#include <scsi/scsi.h>
33	#include <scsi/scsi_tcq.h>
34	#include <scsi/scsi_device.h>
35	#include <scsi/scsi_transport.h>
36
37	#include "sym_glue.h"
38	#include "sym_nvram.h"
39
40	#define NAME53C "sym53c"
41	#define NAME53C8XX "sym53c8xx"
42
43	struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
44	unsigned int sym_debug_flags = 0;
45
46	static char *excl_string;
47	static char *safe_string;
48	module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
49	module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
50	module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
51	module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
52	module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
53	module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
54	module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
55	module_param_named(verb, sym_driver_setup.verbose, byte, 0);
56	module_param_named(debug, sym_debug_flags, uint, 0);
57	module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
58	module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
59	module_param_named(excl, excl_string, charp, 0);
60	module_param_named(safe, safe_string, charp, 0);
61
62	MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
63	MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
64	MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
65	MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
66	MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
67	MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
68	MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
69	MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
70	MODULE_PARM_DESC(debug, "Set bits to enable debugging");
71	MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
72	MODULE_PARM_DESC(nvram, "Option currently not used");
73	MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
74	MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
75
76	MODULE_LICENSE("GPL");
77	MODULE_VERSION(SYM_VERSION);
78	MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
79	MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
80
81	static void sym2_setup_params(void)
82	{
83	char *p = excl_string;
84	int xi = 0;
85
86	while (p && (xi < 8)) {
87	char *next_p;
88	int val = (int) simple_strtoul(p, &next_p, 0);
89	sym_driver_setup.excludes[xi++] = val;
90	p = next_p;
91	}
92
93	if (safe_string) {
94	if (*safe_string == 'y') {
95	sym_driver_setup.max_tag = 0;
96	sym_driver_setup.burst_order = 0;
97	sym_driver_setup.scsi_led = 0;
98	sym_driver_setup.scsi_diff = 1;
99	sym_driver_setup.irq_mode = 0;
100	sym_driver_setup.scsi_bus_check = 2;
101	sym_driver_setup.host_id = 7;
102	sym_driver_setup.verbose = 2;
103	sym_driver_setup.settle_delay = 10;
104	sym_driver_setup.use_nvram = 1;
105	} else if (*safe_string != 'n') {
106	printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
107	" passed to safe option", safe_string);
108	}
109	}
110	}
111
112	static struct scsi_transport_template *sym2_transport_template = NULL;
113
114	/*
115	* Driver private area in the SCSI command structure.
116	*/
117	struct sym_ucmd { /* Override the SCSI pointer structure */
118	struct completion *eh_done; /* SCSI error handling */
119	};
120
121	#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)scsi_cmd_priv(cmd))
122	#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
123
124	/*
125	* Complete a pending CAM CCB.
126	*/
127	void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
128	{
129	struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
130
131	if (ucmd->eh_done)
132	complete(ucmd->eh_done);
133
134	scsi_dma_unmap(cmd);
135	scsi_done(cmd);
136	}
137
138	/*
139	* Tell the SCSI layer about a BUS RESET.
140	*/
141	void sym_xpt_async_bus_reset(struct sym_hcb *np)
142	{
143	printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
144	np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
145	np->s.settle_time_valid = 1;
146	if (sym_verbose >= 2)
147	printf_info("%s: command processing suspended for %d seconds\n",
148	sym_name(np), sym_driver_setup.settle_delay);
149	}
150
151	/*
152	* Choose the more appropriate CAM status if
153	* the IO encountered an extended error.
154	*/
155	static int sym_xerr_cam_status(int cam_status, int x_status)
156	{
157	if (x_status) {
158	if (x_status & XE_PARITY_ERR)
159	cam_status = DID_PARITY;
160	else
161	cam_status = DID_ERROR;
162	}
163	return cam_status;
164	}
165
166	/*
167	* Build CAM result for a failed or auto-sensed IO.
168	*/
169	void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
170	{
171	struct scsi_cmnd *cmd = cp->cmd;
172	u_int cam_status, scsi_status;
173
174	cam_status = DID_OK;
175	scsi_status = cp->ssss_status;
176
177	if (cp->host_flags & HF_SENSE) {
178	scsi_status = cp->sv_scsi_status;
179	resid = cp->sv_resid;
180	if (sym_verbose && cp->sv_xerr_status)
181	sym_print_xerr(cmd, x_status: cp->sv_xerr_status);
182	if (cp->host_status == HS_COMPLETE &&
183	cp->ssss_status == S_GOOD &&
184	cp->xerr_status == 0) {
185	cam_status = sym_xerr_cam_status(cam_status: DID_OK,
186	x_status: cp->sv_xerr_status);
187	/*
188	* Bounce back the sense data to user.
189	*/
190	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
191	memcpy(cmd->sense_buffer, cp->sns_bbuf,
192	min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
193	#if 0
194	/*
195	* If the device reports a UNIT ATTENTION condition
196	* due to a RESET condition, we should consider all
197	* disconnect CCBs for this unit as aborted.
198	*/
199	if (1) {
200	u_char *p;
201	p = (u_char *) cmd->sense_data;
202	if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
203	sym_clear_tasks(np, DID_ABORT,
204	cp->target,cp->lun, -1);
205	}
206	#endif
207	} else {
208	/*
209	* Error return from our internal request sense. This
210	* is bad: we must clear the contingent allegiance
211	* condition otherwise the device will always return
212	* BUSY. Use a big stick.
213	*/
214	sym_reset_scsi_target(np, target: cmd->device->id);
215	cam_status = DID_ERROR;
216	}
217	} else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
218	cam_status = DID_OK;
219	else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
220	cam_status = DID_NO_CONNECT;
221	else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
222	cam_status = DID_ERROR;
223	else { /* Extended error */
224	if (sym_verbose) {
225	sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
226	cp->host_status, cp->ssss_status,
227	cp->xerr_status);
228	}
229	/*
230	* Set the most appropriate value for CAM status.
231	*/
232	cam_status = sym_xerr_cam_status(cam_status: DID_ERROR, x_status: cp->xerr_status);
233	}
234	scsi_set_resid(cmd, resid);
235	cmd->result = (cam_status << 16) | scsi_status;
236	}
237
238	static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
239	{
240	int segment;
241	int use_sg;
242
243	cp->data_len = 0;
244
245	use_sg = scsi_dma_map(cmd);
246	if (use_sg > 0) {
247	struct scatterlist *sg;
248	struct sym_tcb *tp = &np->target[cp->target];
249	struct sym_tblmove *data;
250
251	if (use_sg > SYM_CONF_MAX_SG) {
252	scsi_dma_unmap(cmd);
253	return -1;
254	}
255
256	data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
257
258	scsi_for_each_sg(cmd, sg, use_sg, segment) {
259	dma_addr_t baddr = sg_dma_address(sg);
260	unsigned int len = sg_dma_len(sg);
261
262	if ((len & 1) && (tp->head.wval & EWS)) {
263	len++;
264	cp->odd_byte_adjustment++;
265	}
266
267	sym_build_sge(np, &data[segment], baddr, len);
268	cp->data_len += len;
269	}
270	} else {
271	segment = -2;
272	}
273
274	return segment;
275	}
276
277	/*
278	* Queue a SCSI command.
279	*/
280	static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
281	{
282	struct scsi_device *sdev = cmd->device;
283	struct sym_tcb *tp;
284	struct sym_lcb *lp;
285	struct sym_ccb *cp;
286	int order;
287
288	/*
289	* Retrieve the target descriptor.
290	*/
291	tp = &np->target[sdev->id];
292
293	/*
294	* Select tagged/untagged.
295	*/
296	lp = sym_lp(tp, sdev->lun);
297	order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
298
299	/*
300	* Queue the SCSI IO.
301	*/
302	cp = sym_get_ccb(np, cmd, tag_order: order);
303	if (!cp)
304	return 1; /* Means resource shortage */
305	sym_queue_scsiio(np, csio: cmd, cp);
306	return 0;
307	}
308
309	/*
310	* Setup buffers and pointers that address the CDB.
311	*/
312	static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
313	{
314	memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
315
316	cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
317	cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
318
319	return 0;
320	}
321
322	/*
323	* Setup pointers that address the data and start the I/O.
324	*/
325	int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
326	{
327	u32 lastp, goalp;
328	int dir;
329
330	/*
331	* Build the CDB.
332	*/
333	if (sym_setup_cdb(np, cmd, cp))
334	goto out_abort;
335
336	/*
337	* No direction means no data.
338	*/
339	dir = cmd->sc_data_direction;
340	if (dir != DMA_NONE) {
341	cp->segments = sym_scatter(np, cp, cmd);
342	if (cp->segments < 0) {
343	sym_set_cam_status(cmd, status: DID_ERROR);
344	goto out_abort;
345	}
346
347	/*
348	* No segments means no data.
349	*/
350	if (!cp->segments)
351	dir = DMA_NONE;
352	} else {
353	cp->data_len = 0;
354	cp->segments = 0;
355	}
356
357	/*
358	* Set the data pointer.
359	*/
360	switch (dir) {
361	case DMA_BIDIRECTIONAL:
362	scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
363	sym_set_cam_status(cmd, status: DID_ERROR);
364	goto out_abort;
365	case DMA_TO_DEVICE:
366	goalp = SCRIPTA_BA(np, data_out2) + 8;
367	lastp = goalp - 8 - (cp->segments * (2*4));
368	break;
369	case DMA_FROM_DEVICE:
370	cp->host_flags |= HF_DATA_IN;
371	goalp = SCRIPTA_BA(np, data_in2) + 8;
372	lastp = goalp - 8 - (cp->segments * (2*4));
373	break;
374	case DMA_NONE:
375	default:
376	lastp = goalp = SCRIPTB_BA(np, no_data);
377	break;
378	}
379
380	/*
381	* Set all pointers values needed by SCRIPTS.
382	*/
383	cp->phys.head.lastp = cpu_to_scr(lastp);
384	cp->phys.head.savep = cpu_to_scr(lastp);
385	cp->startp = cp->phys.head.savep;
386	cp->goalp = cpu_to_scr(goalp);
387
388	/*
389	* When `#ifed 1', the code below makes the driver
390	* panic on the first attempt to write to a SCSI device.
391	* It is the first test we want to do after a driver
392	* change that does not seem obviously safe. :)
393	*/
394	#if 0
395	switch (cp->cdb_buf[0]) {
396	case 0x0A: case 0x2A: case 0xAA:
397	panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
398	break;
399	default:
400	break;
401	}
402	#endif
403
404	/*
405	* activate this job.
406	*/
407	sym_put_start_queue(np, cp);
408	return 0;
409
410	out_abort:
411	sym_free_ccb(np, cp);
412	sym_xpt_done(np, cmd);
413	return 0;
414	}
415
416
417	/*
418	* timer daemon.
419	*
420	* Misused to keep the driver running when
421	* interrupts are not configured correctly.
422	*/
423	static void sym_timer(struct sym_hcb *np)
424	{
425	unsigned long thistime = jiffies;
426
427	/*
428	* Restart the timer.
429	*/
430	np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
431	add_timer(timer: &np->s.timer);
432
433	/*
434	* If we are resetting the ncr, wait for settle_time before
435	* clearing it. Then command processing will be resumed.
436	*/
437	if (np->s.settle_time_valid) {
438	if (time_before_eq(np->s.settle_time, thistime)) {
439	if (sym_verbose >= 2 )
440	printk("%s: command processing resumed\n",
441	sym_name(np));
442	np->s.settle_time_valid = 0;
443	}
444	return;
445	}
446
447	/*
448	* Nothing to do for now, but that may come.
449	*/
450	if (np->s.lasttime + 4*HZ < thistime) {
451	np->s.lasttime = thistime;
452	}
453
454	#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
455	/*
456	* Some way-broken PCI bridges may lead to
457	* completions being lost when the clearing
458	* of the INTFLY flag by the CPU occurs
459	* concurrently with the chip raising this flag.
460	* If this ever happen, lost completions will
461	* be reaped here.
462	*/
463	sym_wakeup_done(np);
464	#endif
465	}
466
467
468	/*
469	* PCI BUS error handler.
470	*/
471	void sym_log_bus_error(struct Scsi_Host *shost)
472	{
473	struct sym_data *sym_data = shost_priv(shost);
474	struct pci_dev *pdev = sym_data->pdev;
475	unsigned short pci_sts;
476	pci_read_config_word(dev: pdev, PCI_STATUS, val: &pci_sts);
477	if (pci_sts & 0xf900) {
478	pci_write_config_word(dev: pdev, PCI_STATUS, val: pci_sts);
479	shost_printk(KERN_WARNING, shost,
480	"PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
481	}
482	}
483
484	/*
485	* queuecommand method. Entered with the host adapter lock held and
486	* interrupts disabled.
487	*/
488	static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd)
489	{
490	struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
491	struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
492	int sts = 0;
493
494	memset(ucp, 0, sizeof(*ucp));
495
496	/*
497	* Shorten our settle_time if needed for
498	* this command not to time out.
499	*/
500	if (np->s.settle_time_valid && scsi_cmd_to_rq(scmd: cmd)->timeout) {
501	unsigned long tlimit = jiffies + scsi_cmd_to_rq(scmd: cmd)->timeout;
502	tlimit -= SYM_CONF_TIMER_INTERVAL*2;
503	if (time_after(np->s.settle_time, tlimit)) {
504	np->s.settle_time = tlimit;
505	}
506	}
507
508	if (np->s.settle_time_valid)
509	return SCSI_MLQUEUE_HOST_BUSY;
510
511	sts = sym_queue_command(np, cmd);
512	if (sts)
513	return SCSI_MLQUEUE_HOST_BUSY;
514	return 0;
515	}
516
517	static DEF_SCSI_QCMD(sym53c8xx_queue_command)
518
519	/*
520	* Linux entry point of the interrupt handler.
521	*/
522	static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
523	{
524	struct Scsi_Host *shost = dev_id;
525	struct sym_data *sym_data = shost_priv(shost);
526	irqreturn_t result;
527
528	/* Avoid spinloop trying to handle interrupts on frozen device */
529	if (pci_channel_offline(pdev: sym_data->pdev))
530	return IRQ_NONE;
531
532	if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
533
534	spin_lock(lock: shost->host_lock);
535	result = sym_interrupt(shost);
536	spin_unlock(lock: shost->host_lock);
537
538	if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
539
540	return result;
541	}
542
543	/*
544	* Linux entry point of the timer handler
545	*/
546	static void sym53c8xx_timer(struct timer_list *t)
547	{
548	struct sym_hcb *np = from_timer(np, t, s.timer);
549	unsigned long flags;
550
551	spin_lock_irqsave(np->s.host->host_lock, flags);
552	sym_timer(np);
553	spin_unlock_irqrestore(lock: np->s.host->host_lock, flags);
554	}
555
556
557	/*
558	* What the eh thread wants us to perform.
559	*/
560	#define SYM_EH_ABORT 0
561	#define SYM_EH_DEVICE_RESET 1
562
563	/*
564	* Generic method for our eh processing.
565	* The 'op' argument tells what we have to do.
566	*/
567	/*
568	* Error handlers called from the eh thread (one thread per HBA).
569	*/
570	static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
571	{
572	struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
573	struct Scsi_Host *shost = cmd->device->host;
574	struct sym_data *sym_data = shost_priv(shost);
575	struct pci_dev *pdev = sym_data->pdev;
576	struct sym_hcb *np = sym_data->ncb;
577	SYM_QUEHEAD *qp;
578	int cmd_queued = 0;
579	int sts = -1;
580	struct completion eh_done;
581
582	scmd_printk(KERN_WARNING, cmd, "ABORT operation started\n");
583
584	/*
585	* Escalate to host reset if the PCI bus went down
586	*/
587	if (pci_channel_offline(pdev))
588	return SCSI_FAILED;
589
590	spin_lock_irq(lock: shost->host_lock);
591	/* This one is queued in some place -> to wait for completion */
592	FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
593	struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
594	if (cp->cmd == cmd) {
595	cmd_queued = 1;
596	break;
597	}
598	}
599
600	sts = sym_abort_scsiio(np, ccb: cmd, timed_out: 1);
601	/* On error, restore everything and cross fingers :) */
602	if (sts)
603	cmd_queued = 0;
604
605	if (cmd_queued) {
606	init_completion(x: &eh_done);
607	ucmd->eh_done = &eh_done;
608	spin_unlock_irq(lock: shost->host_lock);
609	if (!wait_for_completion_timeout(x: &eh_done, timeout: 5*HZ)) {
610	ucmd->eh_done = NULL;
611	sts = -2;
612	}
613	} else {
614	spin_unlock_irq(lock: shost->host_lock);
615	}
616
617	dev_warn(&cmd->device->sdev_gendev, "ABORT operation %s.\n",
618	sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
619	return sts ? SCSI_FAILED : SCSI_SUCCESS;
620	}
621
622	static int sym53c8xx_eh_target_reset_handler(struct scsi_cmnd *cmd)
623	{
624	struct scsi_target *starget = scsi_target(sdev: cmd->device);
625	struct Scsi_Host *shost = dev_to_shost(dev: starget->dev.parent);
626	struct sym_data *sym_data = shost_priv(shost);
627	struct pci_dev *pdev = sym_data->pdev;
628	struct sym_hcb *np = sym_data->ncb;
629	SYM_QUEHEAD *qp;
630	int sts;
631	struct completion eh_done;
632
633	starget_printk(KERN_WARNING, starget,
634	"TARGET RESET operation started\n");
635
636	/*
637	* Escalate to host reset if the PCI bus went down
638	*/
639	if (pci_channel_offline(pdev))
640	return SCSI_FAILED;
641
642	spin_lock_irq(lock: shost->host_lock);
643	sts = sym_reset_scsi_target(np, target: starget->id);
644	if (!sts) {
645	FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
646	struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb,
647	link_ccbq);
648	struct scsi_cmnd *cmd = cp->cmd;
649	struct sym_ucmd *ucmd;
650
651	if (!cmd || cmd->device->channel != starget->channel ||
652	cmd->device->id != starget->id)
653	continue;
654
655	ucmd = SYM_UCMD_PTR(cmd);
656	init_completion(x: &eh_done);
657	ucmd->eh_done = &eh_done;
658	spin_unlock_irq(lock: shost->host_lock);
659	if (!wait_for_completion_timeout(x: &eh_done, timeout: 5*HZ)) {
660	ucmd->eh_done = NULL;
661	sts = -2;
662	}
663	spin_lock_irq(lock: shost->host_lock);
664	}
665	}
666	spin_unlock_irq(lock: shost->host_lock);
667
668	starget_printk(KERN_WARNING, starget, "TARGET RESET operation %s.\n",
669	sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
670	return SCSI_SUCCESS;
671	}
672
673	static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
674	{
675	struct Scsi_Host *shost = cmd->device->host;
676	struct sym_data *sym_data = shost_priv(shost);
677	struct pci_dev *pdev = sym_data->pdev;
678	struct sym_hcb *np = sym_data->ncb;
679
680	scmd_printk(KERN_WARNING, cmd, "BUS RESET operation started\n");
681
682	/*
683	* Escalate to host reset if the PCI bus went down
684	*/
685	if (pci_channel_offline(pdev))
686	return SCSI_FAILED;
687
688	spin_lock_irq(lock: shost->host_lock);
689	sym_reset_scsi_bus(np, enab_int: 1);
690	spin_unlock_irq(lock: shost->host_lock);
691
692	dev_warn(&cmd->device->sdev_gendev, "BUS RESET operation complete.\n");
693	return SCSI_SUCCESS;
694	}
695
696	static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
697	{
698	struct Scsi_Host *shost = cmd->device->host;
699	struct sym_data *sym_data = shost_priv(shost);
700	struct pci_dev *pdev = sym_data->pdev;
701	struct sym_hcb *np = sym_data->ncb;
702	struct completion eh_done;
703	int finished_reset = 1;
704
705	shost_printk(KERN_WARNING, shost, "HOST RESET operation started\n");
706
707	/* We may be in an error condition because the PCI bus
708	* went down. In this case, we need to wait until the
709	* PCI bus is reset, the card is reset, and only then
710	* proceed with the scsi error recovery. There's no
711	* point in hurrying; take a leisurely wait.
712	*/
713	#define WAIT_FOR_PCI_RECOVERY 35
714	if (pci_channel_offline(pdev)) {
715	init_completion(x: &eh_done);
716	spin_lock_irq(lock: shost->host_lock);
717	/* Make sure we didn't race */
718	if (pci_channel_offline(pdev)) {
719	BUG_ON(sym_data->io_reset);
720	sym_data->io_reset = &eh_done;
721	finished_reset = 0;
722	}
723	spin_unlock_irq(lock: shost->host_lock);
724	if (!finished_reset)
725	finished_reset = wait_for_completion_timeout
726	(x: sym_data->io_reset,
727	WAIT_FOR_PCI_RECOVERY*HZ);
728	spin_lock_irq(lock: shost->host_lock);
729	sym_data->io_reset = NULL;
730	spin_unlock_irq(lock: shost->host_lock);
731	}
732
733	if (finished_reset) {
734	sym_reset_scsi_bus(np, enab_int: 0);
735	sym_start_up(shost, reason: 1);
736	}
737
738	shost_printk(KERN_WARNING, shost, "HOST RESET operation %s.\n",
739	finished_reset==1 ? "complete" : "failed");
740	return finished_reset ? SCSI_SUCCESS : SCSI_FAILED;
741	}
742
743	/*
744	* Tune device queuing depth, according to various limits.
745	*/
746	static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
747	{
748	struct sym_lcb *lp = sym_lp(tp, lun);
749	u_short oldtags;
750
751	if (!lp)
752	return;
753
754	oldtags = lp->s.reqtags;
755
756	if (reqtags > lp->s.scdev_depth)
757	reqtags = lp->s.scdev_depth;
758
759	lp->s.reqtags = reqtags;
760
761	if (reqtags != oldtags) {
762	dev_info(&tp->starget->dev,
763	"tagged command queuing %s, command queue depth %d.\n",
764	lp->s.reqtags ? "enabled" : "disabled", reqtags);
765	}
766	}
767
768	static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
769	{
770	struct sym_hcb *np = sym_get_hcb(host: sdev->host);
771	struct sym_tcb *tp = &np->target[sdev->id];
772	struct sym_lcb *lp;
773	unsigned long flags;
774	int error;
775
776	if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
777	return -ENXIO;
778
779	spin_lock_irqsave(np->s.host->host_lock, flags);
780
781	/*
782	* Fail the device init if the device is flagged NOSCAN at BOOT in
783	* the NVRAM. This may speed up boot and maintain coherency with
784	* BIOS device numbering. Clearing the flag allows the user to
785	* rescan skipped devices later. We also return an error for
786	* devices not flagged for SCAN LUNS in the NVRAM since some single
787	* lun devices behave badly when asked for a non zero LUN.
788	*/
789
790	if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
791	tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
792	starget_printk(KERN_INFO, sdev->sdev_target,
793	"Scan at boot disabled in NVRAM\n");
794	error = -ENXIO;
795	goto out;
796	}
797
798	if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
799	if (sdev->lun != 0) {
800	error = -ENXIO;
801	goto out;
802	}
803	starget_printk(KERN_INFO, sdev->sdev_target,
804	"Multiple LUNs disabled in NVRAM\n");
805	}
806
807	lp = sym_alloc_lcb(np, tn: sdev->id, ln: sdev->lun);
808	if (!lp) {
809	error = -ENOMEM;
810	goto out;
811	}
812	if (tp->nlcb == 1)
813	tp->starget = sdev->sdev_target;
814
815	spi_min_period(tp->starget) = tp->usr_period;
816	spi_max_width(tp->starget) = tp->usr_width;
817
818	error = 0;
819	out:
820	spin_unlock_irqrestore(lock: np->s.host->host_lock, flags);
821
822	return error;
823	}
824
825	/*
826	* Linux entry point for device queue sizing.
827	*/
828	static int sym53c8xx_slave_configure(struct scsi_device *sdev)
829	{
830	struct sym_hcb *np = sym_get_hcb(host: sdev->host);
831	struct sym_tcb *tp = &np->target[sdev->id];
832	struct sym_lcb *lp = sym_lp(tp, sdev->lun);
833	int reqtags, depth_to_use;
834
835	/*
836	* Get user flags.
837	*/
838	lp->curr_flags = lp->user_flags;
839
840	/*
841	* Select queue depth from driver setup.
842	* Do not use more than configured by user.
843	* Use at least 1.
844	* Do not use more than our maximum.
845	*/
846	reqtags = sym_driver_setup.max_tag;
847	if (reqtags > tp->usrtags)
848	reqtags = tp->usrtags;
849	if (!sdev->tagged_supported)
850	reqtags = 0;
851	if (reqtags > SYM_CONF_MAX_TAG)
852	reqtags = SYM_CONF_MAX_TAG;
853	depth_to_use = reqtags ? reqtags : 1;
854	scsi_change_queue_depth(sdev, depth_to_use);
855	lp->s.scdev_depth = depth_to_use;
856	sym_tune_dev_queuing(tp, lun: sdev->lun, reqtags);
857
858	if (!spi_initial_dv(sdev->sdev_target))
859	spi_dv_device(sdev);
860
861	return 0;
862	}
863
864	static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
865	{
866	struct sym_hcb *np = sym_get_hcb(host: sdev->host);
867	struct sym_tcb *tp = &np->target[sdev->id];
868	struct sym_lcb *lp = sym_lp(tp, sdev->lun);
869	unsigned long flags;
870
871	/* if slave_alloc returned before allocating a sym_lcb, return */
872	if (!lp)
873	return;
874
875	spin_lock_irqsave(np->s.host->host_lock, flags);
876
877	if (lp->busy_itlq || lp->busy_itl) {
878	/*
879	* This really shouldn't happen, but we can't return an error
880	* so let's try to stop all on-going I/O.
881	*/
882	starget_printk(KERN_WARNING, tp->starget,
883	"Removing busy LCB (%d)\n", (u8)sdev->lun);
884	sym_reset_scsi_bus(np, enab_int: 1);
885	}
886
887	if (sym_free_lcb(np, tn: sdev->id, ln: sdev->lun) == 0) {
888	/*
889	* It was the last unit for this target.
890	*/
891	tp->head.sval = 0;
892	tp->head.wval = np->rv_scntl3;
893	tp->head.uval = 0;
894	tp->tgoal.check_nego = 1;
895	tp->starget = NULL;
896	}
897
898	spin_unlock_irqrestore(lock: np->s.host->host_lock, flags);
899	}
900
901	/*
902	* Linux entry point for info() function
903	*/
904	static const char *sym53c8xx_info (struct Scsi_Host *host)
905	{
906	return SYM_DRIVER_NAME;
907	}
908
909
910	#ifdef SYM_LINUX_PROC_INFO_SUPPORT
911	/*
912	* Proc file system stuff
913	*
914	* A read operation returns adapter information.
915	* A write operation is a control command.
916	* The string is parsed in the driver code and the command is passed
917	* to the sym_usercmd() function.
918	*/
919
920	#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
921
922	struct sym_usrcmd {
923	u_long target;
924	u_long lun;
925	u_long data;
926	u_long cmd;
927	};
928
929	#define UC_SETSYNC 10
930	#define UC_SETTAGS 11
931	#define UC_SETDEBUG 12
932	#define UC_SETWIDE 14
933	#define UC_SETFLAG 15
934	#define UC_SETVERBOSE 17
935	#define UC_RESETDEV 18
936	#define UC_CLEARDEV 19
937
938	static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
939	{
940	struct sym_tcb *tp;
941	int t, l;
942
943	switch (uc->cmd) {
944	case 0: return;
945
946	#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
947	case UC_SETDEBUG:
948	sym_debug_flags = uc->data;
949	break;
950	#endif
951	case UC_SETVERBOSE:
952	np->verbose = uc->data;
953	break;
954	default:
955	/*
956	* We assume that other commands apply to targets.
957	* This should always be the case and avoid the below
958	* 4 lines to be repeated 6 times.
959	*/
960	for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
961	if (!((uc->target >> t) & 1))
962	continue;
963	tp = &np->target[t];
964	if (!tp->nlcb)
965	continue;
966
967	switch (uc->cmd) {
968
969	case UC_SETSYNC:
970	if (!uc->data || uc->data >= 255) {
971	tp->tgoal.iu = tp->tgoal.dt =
972	tp->tgoal.qas = 0;
973	tp->tgoal.offset = 0;
974	} else if (uc->data <= 9 && np->minsync_dt) {
975	if (uc->data < np->minsync_dt)
976	uc->data = np->minsync_dt;
977	tp->tgoal.iu = tp->tgoal.dt =
978	tp->tgoal.qas = 1;
979	tp->tgoal.width = 1;
980	tp->tgoal.period = uc->data;
981	tp->tgoal.offset = np->maxoffs_dt;
982	} else {
983	if (uc->data < np->minsync)
984	uc->data = np->minsync;
985	tp->tgoal.iu = tp->tgoal.dt =
986	tp->tgoal.qas = 0;
987	tp->tgoal.period = uc->data;
988	tp->tgoal.offset = np->maxoffs;
989	}
990	tp->tgoal.check_nego = 1;
991	break;
992	case UC_SETWIDE:
993	tp->tgoal.width = uc->data ? 1 : 0;
994	tp->tgoal.check_nego = 1;
995	break;
996	case UC_SETTAGS:
997	for (l = 0; l < SYM_CONF_MAX_LUN; l++)
998	sym_tune_dev_queuing(tp, lun: l, reqtags: uc->data);
999	break;
1000	case UC_RESETDEV:
1001	tp->to_reset = 1;
1002	np->istat_sem = SEM;
1003	OUTB(np, nc_istat, SIGP|SEM);
1004	break;
1005	case UC_CLEARDEV:
1006	for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1007	struct sym_lcb *lp = sym_lp(tp, l);
1008	if (lp) lp->to_clear = 1;
1009	}
1010	np->istat_sem = SEM;
1011	OUTB(np, nc_istat, SIGP|SEM);
1012	break;
1013	case UC_SETFLAG:
1014	tp->usrflags = uc->data;
1015	break;
1016	}
1017	}
1018	break;
1019	}
1020	}
1021
1022	static int sym_skip_spaces(char *ptr, int len)
1023	{
1024	int cnt, c;
1025
1026	for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1027
1028	return (len - cnt);
1029	}
1030
1031	static int get_int_arg(char *ptr, int len, u_long *pv)
1032	{
1033	char *end;
1034
1035	*pv = simple_strtoul(ptr, &end, 10);
1036	return (end - ptr);
1037	}
1038
1039	static int is_keyword(char *ptr, int len, char *verb)
1040	{
1041	int verb_len = strlen(verb);
1042
1043	if (len >= verb_len && !memcmp(p: verb, q: ptr, size: verb_len))
1044	return verb_len;
1045	else
1046	return 0;
1047	}
1048
1049	#define SKIP_SPACES(ptr, len) \
1050	if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \
1051	return -EINVAL; \
1052	ptr += arg_len; len -= arg_len;
1053
1054	#define GET_INT_ARG(ptr, len, v) \
1055	if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1056	return -EINVAL; \
1057	ptr += arg_len; len -= arg_len;
1058
1059
1060	/*
1061	* Parse a control command
1062	*/
1063
1064	static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1065	{
1066	struct sym_hcb *np = sym_get_hcb(host: shost);
1067	char *ptr = buffer;
1068	int len = length;
1069	struct sym_usrcmd cmd, *uc = &cmd;
1070	int arg_len;
1071	u_long target;
1072
1073	memset(uc, 0, sizeof(*uc));
1074
1075	if (len > 0 && ptr[len-1] == '\n')
1076	--len;
1077
1078	if ((arg_len = is_keyword(ptr, len, verb: "setsync")) != 0)
1079	uc->cmd = UC_SETSYNC;
1080	else if ((arg_len = is_keyword(ptr, len, verb: "settags")) != 0)
1081	uc->cmd = UC_SETTAGS;
1082	else if ((arg_len = is_keyword(ptr, len, verb: "setverbose")) != 0)
1083	uc->cmd = UC_SETVERBOSE;
1084	else if ((arg_len = is_keyword(ptr, len, verb: "setwide")) != 0)
1085	uc->cmd = UC_SETWIDE;
1086	#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1087	else if ((arg_len = is_keyword(ptr, len, verb: "setdebug")) != 0)
1088	uc->cmd = UC_SETDEBUG;
1089	#endif
1090	else if ((arg_len = is_keyword(ptr, len, verb: "setflag")) != 0)
1091	uc->cmd = UC_SETFLAG;
1092	else if ((arg_len = is_keyword(ptr, len, verb: "resetdev")) != 0)
1093	uc->cmd = UC_RESETDEV;
1094	else if ((arg_len = is_keyword(ptr, len, verb: "cleardev")) != 0)
1095	uc->cmd = UC_CLEARDEV;
1096	else
1097	arg_len = 0;
1098
1099	#ifdef DEBUG_PROC_INFO
1100	printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1101	#endif
1102
1103	if (!arg_len)
1104	return -EINVAL;
1105	ptr += arg_len; len -= arg_len;
1106
1107	switch(uc->cmd) {
1108	case UC_SETSYNC:
1109	case UC_SETTAGS:
1110	case UC_SETWIDE:
1111	case UC_SETFLAG:
1112	case UC_RESETDEV:
1113	case UC_CLEARDEV:
1114	SKIP_SPACES(ptr, len);
1115	if ((arg_len = is_keyword(ptr, len, verb: "all")) != 0) {
1116	ptr += arg_len; len -= arg_len;
1117	uc->target = ~0;
1118	} else {
1119	GET_INT_ARG(ptr, len, target);
1120	uc->target = (1<<target);
1121	#ifdef DEBUG_PROC_INFO
1122	printk("sym_user_command: target=%ld\n", target);
1123	#endif
1124	}
1125	break;
1126	}
1127
1128	switch(uc->cmd) {
1129	case UC_SETVERBOSE:
1130	case UC_SETSYNC:
1131	case UC_SETTAGS:
1132	case UC_SETWIDE:
1133	SKIP_SPACES(ptr, len);
1134	GET_INT_ARG(ptr, len, uc->data);
1135	#ifdef DEBUG_PROC_INFO
1136	printk("sym_user_command: data=%ld\n", uc->data);
1137	#endif
1138	break;
1139	#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1140	case UC_SETDEBUG:
1141	while (len > 0) {
1142	SKIP_SPACES(ptr, len);
1143	if ((arg_len = is_keyword(ptr, len, verb: "alloc")))
1144	uc->data |= DEBUG_ALLOC;
1145	else if ((arg_len = is_keyword(ptr, len, verb: "phase")))
1146	uc->data |= DEBUG_PHASE;
1147	else if ((arg_len = is_keyword(ptr, len, verb: "queue")))
1148	uc->data |= DEBUG_QUEUE;
1149	else if ((arg_len = is_keyword(ptr, len, verb: "result")))
1150	uc->data |= DEBUG_RESULT;
1151	else if ((arg_len = is_keyword(ptr, len, verb: "scatter")))
1152	uc->data |= DEBUG_SCATTER;
1153	else if ((arg_len = is_keyword(ptr, len, verb: "script")))
1154	uc->data |= DEBUG_SCRIPT;
1155	else if ((arg_len = is_keyword(ptr, len, verb: "tiny")))
1156	uc->data |= DEBUG_TINY;
1157	else if ((arg_len = is_keyword(ptr, len, verb: "timing")))
1158	uc->data |= DEBUG_TIMING;
1159	else if ((arg_len = is_keyword(ptr, len, verb: "nego")))
1160	uc->data |= DEBUG_NEGO;
1161	else if ((arg_len = is_keyword(ptr, len, verb: "tags")))
1162	uc->data |= DEBUG_TAGS;
1163	else if ((arg_len = is_keyword(ptr, len, verb: "pointer")))
1164	uc->data |= DEBUG_POINTER;
1165	else
1166	return -EINVAL;
1167	ptr += arg_len; len -= arg_len;
1168	}
1169	#ifdef DEBUG_PROC_INFO
1170	printk("sym_user_command: data=%ld\n", uc->data);
1171	#endif
1172	break;
1173	#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1174	case UC_SETFLAG:
1175	while (len > 0) {
1176	SKIP_SPACES(ptr, len);
1177	if ((arg_len = is_keyword(ptr, len, verb: "no_disc")))
1178	uc->data &= ~SYM_DISC_ENABLED;
1179	else
1180	return -EINVAL;
1181	ptr += arg_len; len -= arg_len;
1182	}
1183	break;
1184	default:
1185	break;
1186	}
1187
1188	if (len)
1189	return -EINVAL;
1190	else {
1191	unsigned long flags;
1192
1193	spin_lock_irqsave(shost->host_lock, flags);
1194	sym_exec_user_command(np, uc);
1195	spin_unlock_irqrestore(lock: shost->host_lock, flags);
1196	}
1197	return length;
1198	}
1199
1200	#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1201
1202
1203	/*
1204	* Copy formatted information into the input buffer.
1205	*/
1206	static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1207	{
1208	#ifdef SYM_LINUX_USER_INFO_SUPPORT
1209	struct sym_data *sym_data = shost_priv(shost);
1210	struct pci_dev *pdev = sym_data->pdev;
1211	struct sym_hcb *np = sym_data->ncb;
1212
1213	seq_printf(m, fmt: "Chip " NAME53C "%s, device id 0x%x, "
1214	"revision id 0x%x\n", np->s.chip_name,
1215	pdev->device, pdev->revision);
1216	seq_printf(m, fmt: "At PCI address %s, IRQ %u\n",
1217	pci_name(pdev), pdev->irq);
1218	seq_printf(m, fmt: "Min. period factor %d, %s SCSI BUS%s\n",
1219	(int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1220	np->maxwide ? "Wide" : "Narrow",
1221	np->minsync_dt ? ", DT capable" : "");
1222
1223	seq_printf(m, fmt: "Max. started commands %d, "
1224	"max. commands per LUN %d\n",
1225	SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1226
1227	return 0;
1228	#else
1229	return -EINVAL;
1230	#endif /* SYM_LINUX_USER_INFO_SUPPORT */
1231	}
1232
1233	#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1234
1235	/*
1236	* Free resources claimed by sym_iomap_device(). Note that
1237	* sym_free_resources() should be used instead of this function after calling
1238	* sym_attach().
1239	*/
1240	static void sym_iounmap_device(struct sym_device *device)
1241	{
1242	if (device->s.ioaddr)
1243	pci_iounmap(dev: device->pdev, device->s.ioaddr);
1244	if (device->s.ramaddr)
1245	pci_iounmap(dev: device->pdev, device->s.ramaddr);
1246	}
1247
1248	/*
1249	* Free controller resources.
1250	*/
1251	static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1252	int do_free_irq)
1253	{
1254	/*
1255	* Free O/S specific resources.
1256	*/
1257	if (do_free_irq)
1258	free_irq(pdev->irq, np->s.host);
1259	if (np->s.ioaddr)
1260	pci_iounmap(dev: pdev, np->s.ioaddr);
1261	if (np->s.ramaddr)
1262	pci_iounmap(dev: pdev, np->s.ramaddr);
1263	/*
1264	* Free O/S independent resources.
1265	*/
1266	sym_hcb_free(np);
1267
1268	sym_mfree_dma(np, sizeof(*np), "HCB");
1269	}
1270
1271	/*
1272	* Host attach and initialisations.
1273	*
1274	* Allocate host data and ncb structure.
1275	* Remap MMIO region.
1276	* Do chip initialization.
1277	* If all is OK, install interrupt handling and
1278	* start the timer daemon.
1279	*/
1280	static struct Scsi_Host *sym_attach(const struct scsi_host_template *tpnt, int unit,
1281	struct sym_device *dev)
1282	{
1283	struct sym_data *sym_data;
1284	struct sym_hcb *np = NULL;
1285	struct Scsi_Host *shost = NULL;
1286	struct pci_dev *pdev = dev->pdev;
1287	unsigned long flags;
1288	struct sym_fw *fw;
1289	int do_free_irq = 0;
1290
1291	printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1292	unit, dev->chip.name, pdev->revision, pci_name(pdev),
1293	pdev->irq);
1294
1295	/*
1296	* Get the firmware for this chip.
1297	*/
1298	fw = sym_find_firmware(chip: &dev->chip);
1299	if (!fw)
1300	goto attach_failed;
1301
1302	shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1303	if (!shost)
1304	goto attach_failed;
1305	sym_data = shost_priv(shost);
1306
1307	/*
1308	* Allocate immediately the host control block,
1309	* since we are only expecting to succeed. :)
1310	* We keep track in the HCB of all the resources that
1311	* are to be released on error.
1312	*/
1313	np = __sym_calloc_dma(dev_dmat: &pdev->dev, size: sizeof(*np), name: "HCB");
1314	if (!np)
1315	goto attach_failed;
1316	np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1317	sym_data->ncb = np;
1318	sym_data->pdev = pdev;
1319	np->s.host = shost;
1320
1321	pci_set_drvdata(pdev, data: shost);
1322
1323	/*
1324	* Copy some useful infos to the HCB.
1325	*/
1326	np->hcb_ba = vtobus(np);
1327	np->verbose = sym_driver_setup.verbose;
1328	np->s.unit = unit;
1329	np->features = dev->chip.features;
1330	np->clock_divn = dev->chip.nr_divisor;
1331	np->maxoffs = dev->chip.offset_max;
1332	np->maxburst = dev->chip.burst_max;
1333	np->myaddr = dev->host_id;
1334	np->mmio_ba = (u32)dev->mmio_base;
1335	np->ram_ba = (u32)dev->ram_base;
1336	np->s.ioaddr = dev->s.ioaddr;
1337	np->s.ramaddr = dev->s.ramaddr;
1338
1339	/*
1340	* Edit its name.
1341	*/
1342	strscpy(p: np->s.chip_name, q: dev->chip.name, size: sizeof(np->s.chip_name));
1343	sprintf(buf: np->s.inst_name, fmt: "sym%d", np->s.unit);
1344
1345	if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1346	!dma_set_mask(dev: &pdev->dev, DMA_DAC_MASK)) {
1347	set_dac(np);
1348	} else if (dma_set_mask(dev: &pdev->dev, DMA_BIT_MASK(32))) {
1349	printf_warning("%s: No suitable DMA available\n", sym_name(np));
1350	goto attach_failed;
1351	}
1352
1353	if (sym_hcb_attach(shost, fw, nvram: dev->nvram))
1354	goto attach_failed;
1355
1356	/*
1357	* Install the interrupt handler.
1358	* If we synchonize the C code with SCRIPTS on interrupt,
1359	* we do not want to share the INTR line at all.
1360	*/
1361	if (request_irq(irq: pdev->irq, handler: sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1362	dev: shost)) {
1363	printf_err("%s: request irq %u failure\n",
1364	sym_name(np), pdev->irq);
1365	goto attach_failed;
1366	}
1367	do_free_irq = 1;
1368
1369	/*
1370	* After SCSI devices have been opened, we cannot
1371	* reset the bus safely, so we do it here.
1372	*/
1373	spin_lock_irqsave(shost->host_lock, flags);
1374	if (sym_reset_scsi_bus(np, enab_int: 0))
1375	goto reset_failed;
1376
1377	/*
1378	* Start the SCRIPTS.
1379	*/
1380	sym_start_up(shost, reason: 1);
1381
1382	/*
1383	* Start the timer daemon
1384	*/
1385	timer_setup(&np->s.timer, sym53c8xx_timer, 0);
1386	np->s.lasttime=0;
1387	sym_timer (np);
1388
1389	/*
1390	* Fill Linux host instance structure
1391	* and return success.
1392	*/
1393	shost->max_channel = 0;
1394	shost->this_id = np->myaddr;
1395	shost->max_id = np->maxwide ? 16 : 8;
1396	shost->max_lun = SYM_CONF_MAX_LUN;
1397	shost->unique_id = pci_resource_start(pdev, 0);
1398	shost->cmd_per_lun = SYM_CONF_MAX_TAG;
1399	shost->can_queue = (SYM_CONF_MAX_START-2);
1400	shost->sg_tablesize = SYM_CONF_MAX_SG;
1401	shost->max_cmd_len = 16;
1402	BUG_ON(sym2_transport_template == NULL);
1403	shost->transportt = sym2_transport_template;
1404
1405	/* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1406	if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1407	shost->dma_boundary = 0xFFFFFF;
1408
1409	spin_unlock_irqrestore(lock: shost->host_lock, flags);
1410
1411	return shost;
1412
1413	reset_failed:
1414	printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1415	"TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1416	spin_unlock_irqrestore(lock: shost->host_lock, flags);
1417	attach_failed:
1418	printf_info("sym%d: giving up ...\n", unit);
1419	if (np)
1420	sym_free_resources(np, pdev, do_free_irq);
1421	else
1422	sym_iounmap_device(device: dev);
1423	if (shost)
1424	scsi_host_put(t: shost);
1425
1426	return NULL;
1427	}
1428
1429
1430	/*
1431	* Detect and try to read SYMBIOS and TEKRAM NVRAM.
1432	*/
1433	#if SYM_CONF_NVRAM_SUPPORT
1434	static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1435	{
1436	devp->nvram = nvp;
1437	nvp->type = 0;
1438
1439	sym_read_nvram(np: devp, nvp);
1440	}
1441	#else
1442	static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1443	{
1444	}
1445	#endif /* SYM_CONF_NVRAM_SUPPORT */
1446
1447	static int sym_check_supported(struct sym_device *device)
1448	{
1449	struct sym_chip *chip;
1450	struct pci_dev *pdev = device->pdev;
1451	unsigned long io_port = pci_resource_start(pdev, 0);
1452	int i;
1453
1454	/*
1455	* If user excluded this chip, do not initialize it.
1456	* I hate this code so much. Must kill it.
1457	*/
1458	if (io_port) {
1459	for (i = 0 ; i < 8 ; i++) {
1460	if (sym_driver_setup.excludes[i] == io_port)
1461	return -ENODEV;
1462	}
1463	}
1464
1465	/*
1466	* Check if the chip is supported. Then copy the chip description
1467	* to our device structure so we can make it match the actual device
1468	* and options.
1469	*/
1470	chip = sym_lookup_chip_table(device_id: pdev->device, revision: pdev->revision);
1471	if (!chip) {
1472	dev_info(&pdev->dev, "device not supported\n");
1473	return -ENODEV;
1474	}
1475	memcpy(&device->chip, chip, sizeof(device->chip));
1476
1477	return 0;
1478	}
1479
1480	/*
1481	* Ignore Symbios chips controlled by various RAID controllers.
1482	* These controllers set value 0x52414944 at RAM end - 16.
1483	*/
1484	static int sym_check_raid(struct sym_device *device)
1485	{
1486	unsigned int ram_size, ram_val;
1487
1488	if (!device->s.ramaddr)
1489	return 0;
1490
1491	if (device->chip.features & FE_RAM8K)
1492	ram_size = 8192;
1493	else
1494	ram_size = 4096;
1495
1496	ram_val = readl(addr: device->s.ramaddr + ram_size - 16);
1497	if (ram_val != 0x52414944)
1498	return 0;
1499
1500	dev_info(&device->pdev->dev,
1501	"not initializing, driven by RAID controller.\n");
1502	return -ENODEV;
1503	}
1504
1505	static int sym_set_workarounds(struct sym_device *device)
1506	{
1507	struct sym_chip *chip = &device->chip;
1508	struct pci_dev *pdev = device->pdev;
1509	u_short status_reg;
1510
1511	/*
1512	* (ITEM 12 of a DEL about the 896 I haven't yet).
1513	* We must ensure the chip will use WRITE AND INVALIDATE.
1514	* The revision number limit is for now arbitrary.
1515	*/
1516	if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1517	chip->features |= (FE_WRIE | FE_CLSE);
1518	}
1519
1520	/* If the chip can do Memory Write Invalidate, enable it */
1521	if (chip->features & FE_WRIE) {
1522	if (pci_set_mwi(dev: pdev))
1523	return -ENODEV;
1524	}
1525
1526	/*
1527	* Work around for errant bit in 895A. The 66Mhz
1528	* capable bit is set erroneously. Clear this bit.
1529	* (Item 1 DEL 533)
1530	*
1531	* Make sure Config space and Features agree.
1532	*
1533	* Recall: writes are not normal to status register -
1534	* write a 1 to clear and a 0 to leave unchanged.
1535	* Can only reset bits.
1536	*/
1537	pci_read_config_word(dev: pdev, PCI_STATUS, val: &status_reg);
1538	if (chip->features & FE_66MHZ) {
1539	if (!(status_reg & PCI_STATUS_66MHZ))
1540	chip->features &= ~FE_66MHZ;
1541	} else {
1542	if (status_reg & PCI_STATUS_66MHZ) {
1543	status_reg = PCI_STATUS_66MHZ;
1544	pci_write_config_word(dev: pdev, PCI_STATUS, val: status_reg);
1545	pci_read_config_word(dev: pdev, PCI_STATUS, val: &status_reg);
1546	}
1547	}
1548
1549	return 0;
1550	}
1551
1552	/*
1553	* Map HBA registers and on-chip SRAM (if present).
1554	*/
1555	static int sym_iomap_device(struct sym_device *device)
1556	{
1557	struct pci_dev *pdev = device->pdev;
1558	struct pci_bus_region bus_addr;
1559	int i = 2;
1560
1561	pcibios_resource_to_bus(bus: pdev->bus, region: &bus_addr, res: &pdev->resource[1]);
1562	device->mmio_base = bus_addr.start;
1563
1564	if (device->chip.features & FE_RAM) {
1565	/*
1566	* If the BAR is 64-bit, resource 2 will be occupied by the
1567	* upper 32 bits
1568	*/
1569	if (!pdev->resource[i].flags)
1570	i++;
1571	pcibios_resource_to_bus(bus: pdev->bus, region: &bus_addr,
1572	res: &pdev->resource[i]);
1573	device->ram_base = bus_addr.start;
1574	}
1575
1576	#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1577	if (device->mmio_base)
1578	device->s.ioaddr = pci_iomap(dev: pdev, bar: 1,
1579	pci_resource_len(pdev, 1));
1580	#endif
1581	if (!device->s.ioaddr)
1582	device->s.ioaddr = pci_iomap(dev: pdev, bar: 0,
1583	pci_resource_len(pdev, 0));
1584	if (!device->s.ioaddr) {
1585	dev_err(&pdev->dev, "could not map registers; giving up.\n");
1586	return -EIO;
1587	}
1588	if (device->ram_base) {
1589	device->s.ramaddr = pci_iomap(dev: pdev, bar: i,
1590	pci_resource_len(pdev, i));
1591	if (!device->s.ramaddr) {
1592	dev_warn(&pdev->dev,
1593	"could not map SRAM; continuing anyway.\n");
1594	device->ram_base = 0;
1595	}
1596	}
1597
1598	return 0;
1599	}
1600
1601	/*
1602	* The NCR PQS and PDS cards are constructed as a DEC bridge
1603	* behind which sits a proprietary NCR memory controller and
1604	* either four or two 53c875s as separate devices. We can tell
1605	* if an 875 is part of a PQS/PDS or not since if it is, it will
1606	* be on the same bus as the memory controller. In its usual
1607	* mode of operation, the 875s are slaved to the memory
1608	* controller for all transfers. To operate with the Linux
1609	* driver, the memory controller is disabled and the 875s
1610	* freed to function independently. The only wrinkle is that
1611	* the preset SCSI ID (which may be zero) must be read in from
1612	* a special configuration space register of the 875.
1613	*/
1614	static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1615	{
1616	int slot;
1617	u8 tmp;
1618
1619	for (slot = 0; slot < 256; slot++) {
1620	struct pci_dev *memc = pci_get_slot(bus: pdev->bus, devfn: slot);
1621
1622	if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1623	pci_dev_put(dev: memc);
1624	continue;
1625	}
1626
1627	/* bit 1: allow individual 875 configuration */
1628	pci_read_config_byte(dev: memc, where: 0x44, val: &tmp);
1629	if ((tmp & 0x2) == 0) {
1630	tmp |= 0x2;
1631	pci_write_config_byte(dev: memc, where: 0x44, val: tmp);
1632	}
1633
1634	/* bit 2: drive individual 875 interrupts to the bus */
1635	pci_read_config_byte(dev: memc, where: 0x45, val: &tmp);
1636	if ((tmp & 0x4) == 0) {
1637	tmp |= 0x4;
1638	pci_write_config_byte(dev: memc, where: 0x45, val: tmp);
1639	}
1640
1641	pci_dev_put(dev: memc);
1642	break;
1643	}
1644
1645	pci_read_config_byte(dev: pdev, where: 0x84, val: &tmp);
1646	sym_dev->host_id = tmp;
1647	}
1648
1649	/*
1650	* Called before unloading the module.
1651	* Detach the host.
1652	* We have to free resources and halt the NCR chip.
1653	*/
1654	static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1655	{
1656	struct sym_hcb *np = sym_get_hcb(host: shost);
1657	printk("%s: detaching ...\n", sym_name(np));
1658
1659	del_timer_sync(timer: &np->s.timer);
1660
1661	/*
1662	* Reset NCR chip.
1663	* We should use sym_soft_reset(), but we don't want to do
1664	* so, since we may not be safe if interrupts occur.
1665	*/
1666	printk("%s: resetting chip\n", sym_name(np));
1667	OUTB(np, nc_istat, SRST);
1668	INB(np, nc_mbox1);
1669	udelay(10);
1670	OUTB(np, nc_istat, 0);
1671
1672	sym_free_resources(np, pdev, do_free_irq: 1);
1673	scsi_host_put(t: shost);
1674
1675	return 1;
1676	}
1677
1678	/*
1679	* Driver host template.
1680	*/
1681	static const struct scsi_host_template sym2_template = {
1682	.module = THIS_MODULE,
1683	.name = "sym53c8xx",
1684	.info = sym53c8xx_info,
1685	.cmd_size = sizeof(struct sym_ucmd),
1686	.queuecommand = sym53c8xx_queue_command,
1687	.slave_alloc = sym53c8xx_slave_alloc,
1688	.slave_configure = sym53c8xx_slave_configure,
1689	.slave_destroy = sym53c8xx_slave_destroy,
1690	.eh_abort_handler = sym53c8xx_eh_abort_handler,
1691	.eh_target_reset_handler = sym53c8xx_eh_target_reset_handler,
1692	.eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1693	.eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1694	.this_id = 7,
1695	.max_sectors = 0xFFFF,
1696	#ifdef SYM_LINUX_PROC_INFO_SUPPORT
1697	.show_info = sym_show_info,
1698	#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1699	.write_info = sym_user_command,
1700	#endif
1701	.proc_name = NAME53C8XX,
1702	#endif
1703	};
1704
1705	static int attach_count;
1706
1707	static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1708	{
1709	struct sym_device sym_dev;
1710	struct sym_nvram nvram;
1711	struct Scsi_Host *shost;
1712	int do_iounmap = 0;
1713	int do_disable_device = 1;
1714
1715	memset(&sym_dev, 0, sizeof(sym_dev));
1716	memset(&nvram, 0, sizeof(nvram));
1717	sym_dev.pdev = pdev;
1718	sym_dev.host_id = SYM_SETUP_HOST_ID;
1719
1720	if (pci_enable_device(dev: pdev))
1721	goto leave;
1722
1723	pci_set_master(dev: pdev);
1724
1725	if (pci_request_regions(pdev, NAME53C8XX))
1726	goto disable;
1727
1728	if (sym_check_supported(device: &sym_dev))
1729	goto free;
1730
1731	if (sym_iomap_device(device: &sym_dev))
1732	goto free;
1733	do_iounmap = 1;
1734
1735	if (sym_check_raid(device: &sym_dev)) {
1736	do_disable_device = 0; /* Don't disable the device */
1737	goto free;
1738	}
1739
1740	if (sym_set_workarounds(device: &sym_dev))
1741	goto free;
1742
1743	sym_config_pqs(pdev, sym_dev: &sym_dev);
1744
1745	sym_get_nvram(devp: &sym_dev, nvp: &nvram);
1746
1747	do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1748	shost = sym_attach(tpnt: &sym2_template, unit: attach_count, dev: &sym_dev);
1749	if (!shost)
1750	goto free;
1751
1752	if (scsi_add_host(host: shost, dev: &pdev->dev))
1753	goto detach;
1754	scsi_scan_host(shost);
1755
1756	attach_count++;
1757
1758	return 0;
1759
1760	detach:
1761	sym_detach(shost: pci_get_drvdata(pdev), pdev);
1762	free:
1763	if (do_iounmap)
1764	sym_iounmap_device(device: &sym_dev);
1765	pci_release_regions(pdev);
1766	disable:
1767	if (do_disable_device)
1768	pci_disable_device(dev: pdev);
1769	leave:
1770	return -ENODEV;
1771	}
1772
1773	static void sym2_remove(struct pci_dev *pdev)
1774	{
1775	struct Scsi_Host *shost = pci_get_drvdata(pdev);
1776
1777	scsi_remove_host(shost);
1778	sym_detach(shost, pdev);
1779	pci_release_regions(pdev);
1780	pci_disable_device(dev: pdev);
1781
1782	attach_count--;
1783	}
1784
1785	/**
1786	* sym2_io_error_detected() - called when PCI error is detected
1787	* @pdev: pointer to PCI device
1788	* @state: current state of the PCI slot
1789	*/
1790	static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1791	pci_channel_state_t state)
1792	{
1793	/* If slot is permanently frozen, turn everything off */
1794	if (state == pci_channel_io_perm_failure) {
1795	sym2_remove(pdev);
1796	return PCI_ERS_RESULT_DISCONNECT;
1797	}
1798
1799	disable_irq(irq: pdev->irq);
1800	pci_disable_device(dev: pdev);
1801
1802	/* Request that MMIO be enabled, so register dump can be taken. */
1803	return PCI_ERS_RESULT_CAN_RECOVER;
1804	}
1805
1806	/**
1807	* sym2_io_slot_dump - Enable MMIO and dump debug registers
1808	* @pdev: pointer to PCI device
1809	*/
1810	static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1811	{
1812	struct Scsi_Host *shost = pci_get_drvdata(pdev);
1813
1814	sym_dump_registers(shost);
1815
1816	/* Request a slot reset. */
1817	return PCI_ERS_RESULT_NEED_RESET;
1818	}
1819
1820	/**
1821	* sym2_reset_workarounds - hardware-specific work-arounds
1822	* @pdev: pointer to PCI device
1823	*
1824	* This routine is similar to sym_set_workarounds(), except
1825	* that, at this point, we already know that the device was
1826	* successfully initialized at least once before, and so most
1827	* of the steps taken there are un-needed here.
1828	*/
1829	static void sym2_reset_workarounds(struct pci_dev *pdev)
1830	{
1831	u_short status_reg;
1832	struct sym_chip *chip;
1833
1834	chip = sym_lookup_chip_table(device_id: pdev->device, revision: pdev->revision);
1835
1836	/* Work around for errant bit in 895A, in a fashion
1837	* similar to what is done in sym_set_workarounds().
1838	*/
1839	pci_read_config_word(dev: pdev, PCI_STATUS, val: &status_reg);
1840	if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1841	status_reg = PCI_STATUS_66MHZ;
1842	pci_write_config_word(dev: pdev, PCI_STATUS, val: status_reg);
1843	pci_read_config_word(dev: pdev, PCI_STATUS, val: &status_reg);
1844	}
1845	}
1846
1847	/**
1848	* sym2_io_slot_reset() - called when the pci bus has been reset.
1849	* @pdev: pointer to PCI device
1850	*
1851	* Restart the card from scratch.
1852	*/
1853	static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1854	{
1855	struct Scsi_Host *shost = pci_get_drvdata(pdev);
1856	struct sym_hcb *np = sym_get_hcb(host: shost);
1857
1858	printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1859	sym_name(np));
1860
1861	if (pci_enable_device(dev: pdev)) {
1862	printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1863	sym_name(np));
1864	return PCI_ERS_RESULT_DISCONNECT;
1865	}
1866
1867	pci_set_master(dev: pdev);
1868	enable_irq(irq: pdev->irq);
1869
1870	/* If the chip can do Memory Write Invalidate, enable it */
1871	if (np->features & FE_WRIE) {
1872	if (pci_set_mwi(dev: pdev))
1873	return PCI_ERS_RESULT_DISCONNECT;
1874	}
1875
1876	/* Perform work-arounds, analogous to sym_set_workarounds() */
1877	sym2_reset_workarounds(pdev);
1878
1879	/* Perform host reset only on one instance of the card */
1880	if (PCI_FUNC(pdev->devfn) == 0) {
1881	if (sym_reset_scsi_bus(np, enab_int: 0)) {
1882	printk(KERN_ERR "%s: Unable to reset scsi host\n",
1883	sym_name(np));
1884	return PCI_ERS_RESULT_DISCONNECT;
1885	}
1886	sym_start_up(shost, reason: 1);
1887	}
1888
1889	return PCI_ERS_RESULT_RECOVERED;
1890	}
1891
1892	/**
1893	* sym2_io_resume() - resume normal ops after PCI reset
1894	* @pdev: pointer to PCI device
1895	*
1896	* Called when the error recovery driver tells us that its
1897	* OK to resume normal operation. Use completion to allow
1898	* halted scsi ops to resume.
1899	*/
1900	static void sym2_io_resume(struct pci_dev *pdev)
1901	{
1902	struct Scsi_Host *shost = pci_get_drvdata(pdev);
1903	struct sym_data *sym_data = shost_priv(shost);
1904
1905	spin_lock_irq(lock: shost->host_lock);
1906	if (sym_data->io_reset)
1907	complete(sym_data->io_reset);
1908	spin_unlock_irq(lock: shost->host_lock);
1909	}
1910
1911	static void sym2_get_signalling(struct Scsi_Host *shost)
1912	{
1913	struct sym_hcb *np = sym_get_hcb(host: shost);
1914	enum spi_signal_type type;
1915
1916	switch (np->scsi_mode) {
1917	case SMODE_SE:
1918	type = SPI_SIGNAL_SE;
1919	break;
1920	case SMODE_LVD:
1921	type = SPI_SIGNAL_LVD;
1922	break;
1923	case SMODE_HVD:
1924	type = SPI_SIGNAL_HVD;
1925	break;
1926	default:
1927	type = SPI_SIGNAL_UNKNOWN;
1928	break;
1929	}
1930	spi_signalling(shost) = type;
1931	}
1932
1933	static void sym2_set_offset(struct scsi_target *starget, int offset)
1934	{
1935	struct Scsi_Host *shost = dev_to_shost(dev: starget->dev.parent);
1936	struct sym_hcb *np = sym_get_hcb(host: shost);
1937	struct sym_tcb *tp = &np->target[starget->id];
1938
1939	tp->tgoal.offset = offset;
1940	tp->tgoal.check_nego = 1;
1941	}
1942
1943	static void sym2_set_period(struct scsi_target *starget, int period)
1944	{
1945	struct Scsi_Host *shost = dev_to_shost(dev: starget->dev.parent);
1946	struct sym_hcb *np = sym_get_hcb(host: shost);
1947	struct sym_tcb *tp = &np->target[starget->id];
1948
1949	/* have to have DT for these transfers, but DT will also
1950	* set width, so check that this is allowed */
1951	if (period <= np->minsync && spi_width(starget))
1952	tp->tgoal.dt = 1;
1953
1954	tp->tgoal.period = period;
1955	tp->tgoal.check_nego = 1;
1956	}
1957
1958	static void sym2_set_width(struct scsi_target *starget, int width)
1959	{
1960	struct Scsi_Host *shost = dev_to_shost(dev: starget->dev.parent);
1961	struct sym_hcb *np = sym_get_hcb(host: shost);
1962	struct sym_tcb *tp = &np->target[starget->id];
1963
1964	/* It is illegal to have DT set on narrow transfers. If DT is
1965	* clear, we must also clear IU and QAS. */
1966	if (width == 0)
1967	tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1968
1969	tp->tgoal.width = width;
1970	tp->tgoal.check_nego = 1;
1971	}
1972
1973	static void sym2_set_dt(struct scsi_target *starget, int dt)
1974	{
1975	struct Scsi_Host *shost = dev_to_shost(dev: starget->dev.parent);
1976	struct sym_hcb *np = sym_get_hcb(host: shost);
1977	struct sym_tcb *tp = &np->target[starget->id];
1978
1979	/* We must clear QAS and IU if DT is clear */
1980	if (dt)
1981	tp->tgoal.dt = 1;
1982	else
1983	tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1984	tp->tgoal.check_nego = 1;
1985	}
1986
1987	#if 0
1988	static void sym2_set_iu(struct scsi_target *starget, int iu)
1989	{
1990	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1991	struct sym_hcb *np = sym_get_hcb(shost);
1992	struct sym_tcb *tp = &np->target[starget->id];
1993
1994	if (iu)
1995	tp->tgoal.iu = tp->tgoal.dt = 1;
1996	else
1997	tp->tgoal.iu = 0;
1998	tp->tgoal.check_nego = 1;
1999	}
2000
2001	static void sym2_set_qas(struct scsi_target *starget, int qas)
2002	{
2003	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2004	struct sym_hcb *np = sym_get_hcb(shost);
2005	struct sym_tcb *tp = &np->target[starget->id];
2006
2007	if (qas)
2008	tp->tgoal.dt = tp->tgoal.qas = 1;
2009	else
2010	tp->tgoal.qas = 0;
2011	tp->tgoal.check_nego = 1;
2012	}
2013	#endif
2014
2015	static struct spi_function_template sym2_transport_functions = {
2016	.set_offset = sym2_set_offset,
2017	.show_offset = 1,
2018	.set_period = sym2_set_period,
2019	.show_period = 1,
2020	.set_width = sym2_set_width,
2021	.show_width = 1,
2022	.set_dt = sym2_set_dt,
2023	.show_dt = 1,
2024	#if 0
2025	.set_iu = sym2_set_iu,
2026	.show_iu = 1,
2027	.set_qas = sym2_set_qas,
2028	.show_qas = 1,
2029	#endif
2030	.get_signalling = sym2_get_signalling,
2031	};
2032
2033	static struct pci_device_id sym2_id_table[] = {
2034	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2035	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2037	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2038	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2039	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2041	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2042	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2043	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2044	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2045	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2046	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2047	PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL },
2048	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2049	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2050	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2051	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2052	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2053	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2054	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2055	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2056	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2057	PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
2058	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2059	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2060	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2061	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2062	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2063	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2064	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2065	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2066	{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2067	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2068	{ 0, }
2069	};
2070
2071	MODULE_DEVICE_TABLE(pci, sym2_id_table);
2072
2073	static const struct pci_error_handlers sym2_err_handler = {
2074	.error_detected = sym2_io_error_detected,
2075	.mmio_enabled = sym2_io_slot_dump,
2076	.slot_reset = sym2_io_slot_reset,
2077	.resume = sym2_io_resume,
2078	};
2079
2080	static struct pci_driver sym2_driver = {
2081	.name = NAME53C8XX,
2082	.id_table = sym2_id_table,
2083	.probe = sym2_probe,
2084	.remove = sym2_remove,
2085	.err_handler = &sym2_err_handler,
2086	};
2087
2088	static int __init sym2_init(void)
2089	{
2090	int error;
2091
2092	sym2_setup_params();
2093	sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2094	if (!sym2_transport_template)
2095	return -ENODEV;
2096
2097	error = pci_register_driver(&sym2_driver);
2098	if (error)
2099	spi_release_transport(sym2_transport_template);
2100	return error;
2101	}
2102
2103	static void __exit sym2_exit(void)
2104	{
2105	pci_unregister_driver(dev: &sym2_driver);
2106	spi_release_transport(sym2_transport_template);
2107	}
2108
2109	module_init(sym2_init);
2110	module_exit(sym2_exit);
2111