sa.c revision bd1aac809ddbcf7772cfd809d8cfb29c729c6cf9 
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		set_current_state(TASK_UNINTERRUPTIBLE);
193		schedule_timeout(1);
194	}
195
196	if (ok != 1)
197		return -ETIMEDOUT;
198	/*
199	 *	Clear the synch command doorbell.
200	 */
201	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
202	/*
203	 *	Pull the synch status from Mailbox 0.
204	 */
205	if (ret)
206		*ret = sa_readl(dev, Mailbox0);
207	if (r1)
208		*r1 = sa_readl(dev, Mailbox1);
209	if (r2)
210		*r2 = sa_readl(dev, Mailbox2);
211	if (r3)
212		*r3 = sa_readl(dev, Mailbox3);
213	if (r4)
214		*r4 = sa_readl(dev, Mailbox4);
215	return 0;
216}
217
218/**
219 *	aac_sa_interrupt_adapter	-	interrupt an adapter
220 *	@dev: Which adapter to enable.
221 *
222 *	Breakpoint an adapter.
223 */
224
225static void aac_sa_interrupt_adapter (struct aac_dev *dev)
226{
227	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
228			NULL, NULL, NULL, NULL, NULL);
229}
230
231/**
232 *	aac_sa_start_adapter		-	activate adapter
233 *	@dev:	Adapter
234 *
235 *	Start up processing on an ARM based AAC adapter
236 */
237
238static void aac_sa_start_adapter(struct aac_dev *dev)
239{
240	u32 ret;
241	struct aac_init *init;
242	/*
243	 * Fill in the remaining pieces of the init.
244	 */
245	init = dev->init;
246	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
247
248	/*
249	 * Tell the adapter we are back and up and running so it will scan its command
250	 * queues and enable our interrupts
251	 */
252	dev->irq_mask =	(PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
253	/*
254	 *	First clear out all interrupts.  Then enable the one's that
255	 *	we can handle.
256	 */
257	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
258	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
259	/* We can only use a 32 bit address here */
260	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
261			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
262			&ret, NULL, NULL, NULL, NULL);
263}
264
265/**
266 *	aac_sa_check_health
267 *	@dev: device to check if healthy
268 *
269 *	Will attempt to determine if the specified adapter is alive and
270 *	capable of handling requests, returning 0 if alive.
271 */
272static int aac_sa_check_health(struct aac_dev *dev)
273{
274	long status = sa_readl(dev, Mailbox7);
275
276	/*
277	 *	Check to see if the board failed any self tests.
278	 */
279	if (status & SELF_TEST_FAILED)
280		return -1;
281	/*
282	 *	Check to see if the board panic'd while booting.
283	 */
284	if (status & KERNEL_PANIC)
285		return -2;
286	/*
287	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
288	 */
289	if (!(status & KERNEL_UP_AND_RUNNING))
290		return -3;
291	/*
292	 *	Everything is OK
293	 */
294	return 0;
295}
296
297/**
298 *	aac_sa_init	-	initialize an ARM based AAC card
299 *	@dev: device to configure
300 *
301 *	Allocate and set up resources for the ARM based AAC variants. The
302 *	device_interface in the commregion will be allocated and linked
303 *	to the comm region.
304 */
305
306int aac_sa_init(struct aac_dev *dev)
307{
308	unsigned long start;
309	unsigned long status;
310	int instance;
311	const char *name;
312
313	instance = dev->id;
314	name     = dev->name;
315
316	/*
317	 *	Map in the registers from the adapter.
318	 */
319
320	if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
321	{
322		printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
323		goto error_iounmap;
324	}
325	/*
326	 *	Check to see if the board failed any self tests.
327	 */
328	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
329		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
330		goto error_iounmap;
331	}
332	/*
333	 *	Check to see if the board panic'd while booting.
334	 */
335	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
336		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
337		goto error_iounmap;
338	}
339	start = jiffies;
340	/*
341	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
342	 */
343	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
344		if (time_after(jiffies, start+180*HZ)) {
345			status = sa_readl(dev, Mailbox7);
346			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
347					name, instance, status);
348			goto error_iounmap;
349		}
350		set_current_state(TASK_UNINTERRUPTIBLE);
351		schedule_timeout(1);
352	}
353
354	if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
355		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
356		goto error_iounmap;
357	}
358
359	/*
360	 *	Fill in the function dispatch table.
361	 */
362
363	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
364	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
365	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
366	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
367	dev->a_ops.adapter_check_health = aac_sa_check_health;
368
369	/*
370	 *	First clear out all interrupts.  Then enable the one's that
371	 *	we can handle.
372	 */
373	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
374	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
375				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
376
377	if(aac_init_adapter(dev) == NULL)
378		goto error_irq;
379
380	/*
381	 *	Start any kernel threads needed
382	 */
383	dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
384	if (dev->thread_pid < 0) {
385		printk(KERN_ERR "aacraid: Unable to create command thread.\n");
386		goto error_kfree;
387	}
388
389	/*
390	 *	Tell the adapter that all is configure, and it can start
391	 *	accepting requests
392	 */
393	aac_sa_start_adapter(dev);
394	return 0;
395
396
397error_kfree:
398	kfree(dev->queues);
399
400error_irq:
401	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
402	free_irq(dev->scsi_host_ptr->irq, (void *)dev);
403
404error_iounmap:
405	iounmap(dev->regs.sa);
406
407	return -1;
408}
409
410