sa.c revision a9a3047dd8ae43ff24caae5ec733a93df129568e 
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 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/sched.h>
35#include <linux/pci.h>
36#include <linux/spinlock.h>
37#include <linux/slab.h>
38#include <linux/blkdev.h>
39#include <linux/delay.h>
40#include <linux/completion.h>
41#include <linux/time.h>
42#include <linux/interrupt.h>
43#include <asm/semaphore.h>
44
45#include <scsi/scsi_host.h>
46
47#include "aacraid.h"
48
49static irqreturn_t aac_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
50{
51	struct aac_dev *dev = dev_id;
52	unsigned short intstat, mask;
53
54	intstat = sa_readw(dev, DoorbellReg_p);
55	/*
56	 *	Read mask and invert because drawbridge is reversed.
57	 *	This allows us to only service interrupts that have been enabled.
58	 */
59	mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
60
61	/* Check to see if this is our interrupt.  If it isn't just return */
62
63	if (intstat & mask) {
64		if (intstat & PrintfReady) {
65			aac_printf(dev, sa_readl(dev, Mailbox5));
66			sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
67			sa_writew(dev, DoorbellReg_s, PrintfDone);
68		} else if (intstat & DOORBELL_1) {	// dev -> Host Normal Command Ready
69			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
70			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
71		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
72			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
73			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
74		} else if (intstat & DOORBELL_3) {	// dev -> Host Normal Command Not Full
75			sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
76		} else if (intstat & DOORBELL_4) {	// dev -> Host Normal Response Not Full
77			sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
78		}
79		return IRQ_HANDLED;
80	}
81	return IRQ_NONE;
82}
83
84/**
85 *	aac_sa_disable_interrupt	-	disable interrupt
86 *	@dev: Which adapter to enable.
87 */
88
89static void aac_sa_disable_interrupt (struct aac_dev *dev)
90{
91	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
92}
93
94/**
95 *	aac_sa_notify_adapter		-	handle adapter notification
96 *	@dev:	Adapter that notification is for
97 *	@event:	Event to notidy
98 *
99 *	Notify the adapter of an event
100 */
101
102static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
103{
104	switch (event) {
105
106	case AdapNormCmdQue:
107		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
108		break;
109	case HostNormRespNotFull:
110		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
111		break;
112	case AdapNormRespQue:
113		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
114		break;
115	case HostNormCmdNotFull:
116		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
117		break;
118	case HostShutdown:
119		/*
120		sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
121		NULL, NULL, NULL, NULL, NULL);
122		*/
123		break;
124	case FastIo:
125		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
126		break;
127	case AdapPrintfDone:
128		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
129		break;
130	default:
131		BUG();
132		break;
133	}
134}
135
136
137/**
138 *	sa_sync_cmd	-	send a command and wait
139 *	@dev: Adapter
140 *	@command: Command to execute
141 *	@p1: first parameter
142 *	@ret: adapter status
143 *
144 *	This routine will send a synchronous command to the adapter and wait
145 *	for its	completion.
146 */
147
148static int sa_sync_cmd(struct aac_dev *dev, u32 command,
149		u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
150		u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
151{
152	unsigned long start;
153 	int ok;
154	/*
155	 *	Write the Command into Mailbox 0
156	 */
157	sa_writel(dev, Mailbox0, command);
158	/*
159	 *	Write the parameters into Mailboxes 1 - 4
160	 */
161	sa_writel(dev, Mailbox1, p1);
162	sa_writel(dev, Mailbox2, p2);
163	sa_writel(dev, Mailbox3, p3);
164	sa_writel(dev, Mailbox4, p4);
165
166	/*
167	 *	Clear the synch command doorbell to start on a clean slate.
168	 */
169	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
170	/*
171	 *	Signal that there is a new synch command
172	 */
173	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
174
175	ok = 0;
176	start = jiffies;
177
178	while(time_before(jiffies, start+30*HZ))
179	{
180		/*
181		 *	Delay 5uS so that the monitor gets access
182		 */
183		udelay(5);
184		/*
185		 *	Mon110 will set doorbell0 bit when it has
186		 *	completed the command.
187		 */
188		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
189			ok = 1;
190			break;
191		}
192		schedule_timeout_uninterruptible(1);
193	}
194
195	if (ok != 1)
196		return -ETIMEDOUT;
197	/*
198	 *	Clear the synch command doorbell.
199	 */
200	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
201	/*
202	 *	Pull the synch status from Mailbox 0.
203	 */
204	if (ret)
205		*ret = sa_readl(dev, Mailbox0);
206	if (r1)
207		*r1 = sa_readl(dev, Mailbox1);
208	if (r2)
209		*r2 = sa_readl(dev, Mailbox2);
210	if (r3)
211		*r3 = sa_readl(dev, Mailbox3);
212	if (r4)
213		*r4 = sa_readl(dev, Mailbox4);
214	return 0;
215}
216
217/**
218 *	aac_sa_interrupt_adapter	-	interrupt an adapter
219 *	@dev: Which adapter to enable.
220 *
221 *	Breakpoint an adapter.
222 */
223
224static void aac_sa_interrupt_adapter (struct aac_dev *dev)
225{
226	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
227			NULL, NULL, NULL, NULL, NULL);
228}
229
230/**
231 *	aac_sa_start_adapter		-	activate adapter
232 *	@dev:	Adapter
233 *
234 *	Start up processing on an ARM based AAC adapter
235 */
236
237static void aac_sa_start_adapter(struct aac_dev *dev)
238{
239	struct aac_init *init;
240	/*
241	 * Fill in the remaining pieces of the init.
242	 */
243	init = dev->init;
244	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
245	/* We can only use a 32 bit address here */
246	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
247			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
248			NULL, NULL, NULL, NULL, NULL);
249}
250
251/**
252 *	aac_sa_check_health
253 *	@dev: device to check if healthy
254 *
255 *	Will attempt to determine if the specified adapter is alive and
256 *	capable of handling requests, returning 0 if alive.
257 */
258static int aac_sa_check_health(struct aac_dev *dev)
259{
260	long status = sa_readl(dev, Mailbox7);
261
262	/*
263	 *	Check to see if the board failed any self tests.
264	 */
265	if (status & SELF_TEST_FAILED)
266		return -1;
267	/*
268	 *	Check to see if the board panic'd while booting.
269	 */
270	if (status & KERNEL_PANIC)
271		return -2;
272	/*
273	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
274	 */
275	if (!(status & KERNEL_UP_AND_RUNNING))
276		return -3;
277	/*
278	 *	Everything is OK
279	 */
280	return 0;
281}
282
283/**
284 *	aac_sa_init	-	initialize an ARM based AAC card
285 *	@dev: device to configure
286 *
287 *	Allocate and set up resources for the ARM based AAC variants. The
288 *	device_interface in the commregion will be allocated and linked
289 *	to the comm region.
290 */
291
292int aac_sa_init(struct aac_dev *dev)
293{
294	unsigned long start;
295	unsigned long status;
296	int instance;
297	const char *name;
298
299	instance = dev->id;
300	name     = dev->name;
301
302	/*
303	 *	Check to see if the board failed any self tests.
304	 */
305	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
306		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
307		goto error_iounmap;
308	}
309	/*
310	 *	Check to see if the board panic'd while booting.
311	 */
312	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
313		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
314		goto error_iounmap;
315	}
316	start = jiffies;
317	/*
318	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
319	 */
320	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
321		if (time_after(jiffies, start+180*HZ)) {
322			status = sa_readl(dev, Mailbox7);
323			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
324					name, instance, status);
325			goto error_iounmap;
326		}
327		schedule_timeout_uninterruptible(1);
328	}
329
330	if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
331		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
332		goto error_iounmap;
333	}
334
335	/*
336	 *	Fill in the function dispatch table.
337	 */
338
339	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
340	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
341	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
342	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
343	dev->a_ops.adapter_check_health = aac_sa_check_health;
344
345	/*
346	 *	First clear out all interrupts.  Then enable the one's that
347	 *	we can handle.
348	 */
349	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
350	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
351				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
352
353	if(aac_init_adapter(dev) == NULL)
354		goto error_irq;
355
356	/*
357	 *	Tell the adapter that all is configure, and it can start
358	 *	accepting requests
359	 */
360	aac_sa_start_adapter(dev);
361	return 0;
362
363error_irq:
364	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
365	free_irq(dev->scsi_host_ptr->irq, (void *)dev);
366
367error_iounmap:
368
369	return -1;
370}
371
372