sa.c revision 8ef2224707996aede1808f40116cd467b7c8d549 
1/*
2 *	Adaptec AAC series RAID controller driver
3 *	(c) Copyright 2001 Red Hat Inc.	<alan@redhat.com>
4 *
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
7 *
8 * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING.  If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 * Module Name:
25 *  sa.c
26 *
27 * Abstract: Drawbridge specific support functions
28 *
29 */
30
31#include <linux/kernel.h>
32#include <linux/init.h>
33#include <linux/types.h>
34#include <linux/pci.h>
35#include <linux/spinlock.h>
36#include <linux/slab.h>
37#include <linux/blkdev.h>
38#include <linux/delay.h>
39#include <linux/completion.h>
40#include <linux/time.h>
41#include <linux/interrupt.h>
42#include <asm/semaphore.h>
43
44#include <scsi/scsi_host.h>
45
46#include "aacraid.h"
47
48static irqreturn_t aac_sa_intr(int irq, void *dev_id)
49{
50	struct aac_dev *dev = dev_id;
51	unsigned short intstat, mask;
52
53	intstat = sa_readw(dev, DoorbellReg_p);
54	/*
55	 *	Read mask and invert because drawbridge is reversed.
56	 *	This allows us to only service interrupts that have been enabled.
57	 */
58	mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
59
60	/* Check to see if this is our interrupt.  If it isn't just return */
61
62	if (intstat & mask) {
63		if (intstat & PrintfReady) {
64			aac_printf(dev, sa_readl(dev, Mailbox5));
65			sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
66			sa_writew(dev, DoorbellReg_s, PrintfDone);
67		} else if (intstat & DOORBELL_1) {	// dev -> Host Normal Command Ready
68			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
69			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
70		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
71			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
72			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
73		} else if (intstat & DOORBELL_3) {	// dev -> Host Normal Command Not Full
74			sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
75		} else if (intstat & DOORBELL_4) {	// dev -> Host Normal Response Not Full
76			sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
77		}
78		return IRQ_HANDLED;
79	}
80	return IRQ_NONE;
81}
82
83/**
84 *	aac_sa_disable_interrupt	-	disable interrupt
85 *	@dev: Which adapter to enable.
86 */
87
88static void aac_sa_disable_interrupt (struct aac_dev *dev)
89{
90	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
91}
92
93/**
94 *	aac_sa_enable_interrupt	-	enable interrupt
95 *	@dev: Which adapter to enable.
96 */
97
98static void aac_sa_enable_interrupt (struct aac_dev *dev)
99{
100	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
101				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
102}
103
104/**
105 *	aac_sa_notify_adapter		-	handle adapter notification
106 *	@dev:	Adapter that notification is for
107 *	@event:	Event to notidy
108 *
109 *	Notify the adapter of an event
110 */
111
112static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
113{
114	switch (event) {
115
116	case AdapNormCmdQue:
117		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
118		break;
119	case HostNormRespNotFull:
120		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
121		break;
122	case AdapNormRespQue:
123		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
124		break;
125	case HostNormCmdNotFull:
126		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
127		break;
128	case HostShutdown:
129		/*
130		sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
131		NULL, NULL, NULL, NULL, NULL);
132		*/
133		break;
134	case FastIo:
135		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
136		break;
137	case AdapPrintfDone:
138		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
139		break;
140	default:
141		BUG();
142		break;
143	}
144}
145
146
147/**
148 *	sa_sync_cmd	-	send a command and wait
149 *	@dev: Adapter
150 *	@command: Command to execute
151 *	@p1: first parameter
152 *	@ret: adapter status
153 *
154 *	This routine will send a synchronous command to the adapter and wait
155 *	for its	completion.
156 */
157
158static int sa_sync_cmd(struct aac_dev *dev, u32 command,
159		u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
160		u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
161{
162	unsigned long start;
163 	int ok;
164	/*
165	 *	Write the Command into Mailbox 0
166	 */
167	sa_writel(dev, Mailbox0, command);
168	/*
169	 *	Write the parameters into Mailboxes 1 - 4
170	 */
171	sa_writel(dev, Mailbox1, p1);
172	sa_writel(dev, Mailbox2, p2);
173	sa_writel(dev, Mailbox3, p3);
174	sa_writel(dev, Mailbox4, p4);
175
176	/*
177	 *	Clear the synch command doorbell to start on a clean slate.
178	 */
179	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
180	/*
181	 *	Signal that there is a new synch command
182	 */
183	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
184
185	ok = 0;
186	start = jiffies;
187
188	while(time_before(jiffies, start+30*HZ))
189	{
190		/*
191		 *	Delay 5uS so that the monitor gets access
192		 */
193		udelay(5);
194		/*
195		 *	Mon110 will set doorbell0 bit when it has
196		 *	completed the command.
197		 */
198		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
199			ok = 1;
200			break;
201		}
202		msleep(1);
203	}
204
205	if (ok != 1)
206		return -ETIMEDOUT;
207	/*
208	 *	Clear the synch command doorbell.
209	 */
210	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
211	/*
212	 *	Pull the synch status from Mailbox 0.
213	 */
214	if (ret)
215		*ret = sa_readl(dev, Mailbox0);
216	if (r1)
217		*r1 = sa_readl(dev, Mailbox1);
218	if (r2)
219		*r2 = sa_readl(dev, Mailbox2);
220	if (r3)
221		*r3 = sa_readl(dev, Mailbox3);
222	if (r4)
223		*r4 = sa_readl(dev, Mailbox4);
224	return 0;
225}
226
227/**
228 *	aac_sa_interrupt_adapter	-	interrupt an adapter
229 *	@dev: Which adapter to enable.
230 *
231 *	Breakpoint an adapter.
232 */
233
234static void aac_sa_interrupt_adapter (struct aac_dev *dev)
235{
236	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
237			NULL, NULL, NULL, NULL, NULL);
238}
239
240/**
241 *	aac_sa_start_adapter		-	activate adapter
242 *	@dev:	Adapter
243 *
244 *	Start up processing on an ARM based AAC adapter
245 */
246
247static void aac_sa_start_adapter(struct aac_dev *dev)
248{
249	struct aac_init *init;
250	/*
251	 * Fill in the remaining pieces of the init.
252	 */
253	init = dev->init;
254	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
255	/* We can only use a 32 bit address here */
256	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
257			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
258			NULL, NULL, NULL, NULL, NULL);
259}
260
261static int aac_sa_restart_adapter(struct aac_dev *dev, int bled)
262{
263	return -EINVAL;
264}
265
266/**
267 *	aac_sa_check_health
268 *	@dev: device to check if healthy
269 *
270 *	Will attempt to determine if the specified adapter is alive and
271 *	capable of handling requests, returning 0 if alive.
272 */
273static int aac_sa_check_health(struct aac_dev *dev)
274{
275	long status = sa_readl(dev, Mailbox7);
276
277	/*
278	 *	Check to see if the board failed any self tests.
279	 */
280	if (status & SELF_TEST_FAILED)
281		return -1;
282	/*
283	 *	Check to see if the board panic'd while booting.
284	 */
285	if (status & KERNEL_PANIC)
286		return -2;
287	/*
288	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
289	 */
290	if (!(status & KERNEL_UP_AND_RUNNING))
291		return -3;
292	/*
293	 *	Everything is OK
294	 */
295	return 0;
296}
297
298/**
299 *	aac_sa_ioremap
300 *	@size: mapping resize request
301 *
302 */
303static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
304{
305	if (!size) {
306		iounmap(dev->regs.sa);
307		return 0;
308	}
309	dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
310	return (dev->base == NULL) ? -1 : 0;
311}
312
313/**
314 *	aac_sa_init	-	initialize an ARM based AAC card
315 *	@dev: device to configure
316 *
317 *	Allocate and set up resources for the ARM based AAC variants. The
318 *	device_interface in the commregion will be allocated and linked
319 *	to the comm region.
320 */
321
322int aac_sa_init(struct aac_dev *dev)
323{
324	unsigned long start;
325	unsigned long status;
326	int instance;
327	const char *name;
328
329	instance = dev->id;
330	name     = dev->name;
331
332	if (aac_sa_ioremap(dev, dev->base_size)) {
333		printk(KERN_WARNING "%s: unable to map adapter.\n", name);
334		goto error_iounmap;
335	}
336
337	/*
338	 *	Check to see if the board failed any self tests.
339	 */
340	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
341		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
342		goto error_iounmap;
343	}
344	/*
345	 *	Check to see if the board panic'd while booting.
346	 */
347	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
348		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
349		goto error_iounmap;
350	}
351	start = jiffies;
352	/*
353	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
354	 */
355	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
356		if (time_after(jiffies, start+startup_timeout*HZ)) {
357			status = sa_readl(dev, Mailbox7);
358			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
359					name, instance, status);
360			goto error_iounmap;
361		}
362		msleep(1);
363	}
364
365	/*
366	 *	Fill in the function dispatch table.
367	 */
368
369	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
370	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
371	dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
372	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
373	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
374	dev->a_ops.adapter_check_health = aac_sa_check_health;
375	dev->a_ops.adapter_restart = aac_sa_restart_adapter;
376	dev->a_ops.adapter_intr = aac_sa_intr;
377	dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
378	dev->a_ops.adapter_ioremap = aac_sa_ioremap;
379
380	/*
381	 *	First clear out all interrupts.  Then enable the one's that
382	 *	we can handle.
383	 */
384	aac_adapter_disable_int(dev);
385	aac_adapter_enable_int(dev);
386
387	if(aac_init_adapter(dev) == NULL)
388		goto error_irq;
389	if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
390			IRQF_SHARED|IRQF_DISABLED,
391			"aacraid", (void *)dev ) < 0) {
392		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
393			name, instance);
394		goto error_iounmap;
395	}
396	aac_adapter_enable_int(dev);
397
398	/*
399	 *	Tell the adapter that all is configure, and it can start
400	 *	accepting requests
401	 */
402	aac_sa_start_adapter(dev);
403	return 0;
404
405error_irq:
406	aac_sa_disable_interrupt(dev);
407	free_irq(dev->pdev->irq, (void *)dev);
408
409error_iounmap:
410
411	return -1;
412}
413
414