sa.c revision 28713324a0f3c055186ecec27239673c36ba1de5 
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)
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			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
70			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
71		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
72			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
73			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
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_enable_interrupt	-	enable interrupt
96 *	@dev: Which adapter to enable.
97 */
98
99static void aac_sa_enable_interrupt (struct aac_dev *dev)
100{
101	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
102				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
103}
104
105/**
106 *	aac_sa_notify_adapter		-	handle adapter notification
107 *	@dev:	Adapter that notification is for
108 *	@event:	Event to notidy
109 *
110 *	Notify the adapter of an event
111 */
112
113static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
114{
115	switch (event) {
116
117	case AdapNormCmdQue:
118		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
119		break;
120	case HostNormRespNotFull:
121		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
122		break;
123	case AdapNormRespQue:
124		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
125		break;
126	case HostNormCmdNotFull:
127		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
128		break;
129	case HostShutdown:
130		/*
131		sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
132		NULL, NULL, NULL, NULL, NULL);
133		*/
134		break;
135	case FastIo:
136		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
137		break;
138	case AdapPrintfDone:
139		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
140		break;
141	default:
142		BUG();
143		break;
144	}
145}
146
147
148/**
149 *	sa_sync_cmd	-	send a command and wait
150 *	@dev: Adapter
151 *	@command: Command to execute
152 *	@p1: first parameter
153 *	@ret: adapter status
154 *
155 *	This routine will send a synchronous command to the adapter and wait
156 *	for its	completion.
157 */
158
159static int sa_sync_cmd(struct aac_dev *dev, u32 command,
160		u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
161		u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
162{
163	unsigned long start;
164 	int ok;
165	/*
166	 *	Write the Command into Mailbox 0
167	 */
168	sa_writel(dev, Mailbox0, command);
169	/*
170	 *	Write the parameters into Mailboxes 1 - 4
171	 */
172	sa_writel(dev, Mailbox1, p1);
173	sa_writel(dev, Mailbox2, p2);
174	sa_writel(dev, Mailbox3, p3);
175	sa_writel(dev, Mailbox4, p4);
176
177	/*
178	 *	Clear the synch command doorbell to start on a clean slate.
179	 */
180	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
181	/*
182	 *	Signal that there is a new synch command
183	 */
184	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
185
186	ok = 0;
187	start = jiffies;
188
189	while(time_before(jiffies, start+30*HZ))
190	{
191		/*
192		 *	Delay 5uS so that the monitor gets access
193		 */
194		udelay(5);
195		/*
196		 *	Mon110 will set doorbell0 bit when it has
197		 *	completed the command.
198		 */
199		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
200			ok = 1;
201			break;
202		}
203		msleep(1);
204	}
205
206	if (ok != 1)
207		return -ETIMEDOUT;
208	/*
209	 *	Clear the synch command doorbell.
210	 */
211	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
212	/*
213	 *	Pull the synch status from Mailbox 0.
214	 */
215	if (ret)
216		*ret = sa_readl(dev, Mailbox0);
217	if (r1)
218		*r1 = sa_readl(dev, Mailbox1);
219	if (r2)
220		*r2 = sa_readl(dev, Mailbox2);
221	if (r3)
222		*r3 = sa_readl(dev, Mailbox3);
223	if (r4)
224		*r4 = sa_readl(dev, Mailbox4);
225	return 0;
226}
227
228/**
229 *	aac_sa_interrupt_adapter	-	interrupt an adapter
230 *	@dev: Which adapter to enable.
231 *
232 *	Breakpoint an adapter.
233 */
234
235static void aac_sa_interrupt_adapter (struct aac_dev *dev)
236{
237	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
238			NULL, NULL, NULL, NULL, NULL);
239}
240
241/**
242 *	aac_sa_start_adapter		-	activate adapter
243 *	@dev:	Adapter
244 *
245 *	Start up processing on an ARM based AAC adapter
246 */
247
248static void aac_sa_start_adapter(struct aac_dev *dev)
249{
250	struct aac_init *init;
251	/*
252	 * Fill in the remaining pieces of the init.
253	 */
254	init = dev->init;
255	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
256	/* We can only use a 32 bit address here */
257	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
258			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
259			NULL, NULL, NULL, NULL, NULL);
260}
261
262/**
263 *	aac_sa_check_health
264 *	@dev: device to check if healthy
265 *
266 *	Will attempt to determine if the specified adapter is alive and
267 *	capable of handling requests, returning 0 if alive.
268 */
269static int aac_sa_check_health(struct aac_dev *dev)
270{
271	long status = sa_readl(dev, Mailbox7);
272
273	/*
274	 *	Check to see if the board failed any self tests.
275	 */
276	if (status & SELF_TEST_FAILED)
277		return -1;
278	/*
279	 *	Check to see if the board panic'd while booting.
280	 */
281	if (status & KERNEL_PANIC)
282		return -2;
283	/*
284	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
285	 */
286	if (!(status & KERNEL_UP_AND_RUNNING))
287		return -3;
288	/*
289	 *	Everything is OK
290	 */
291	return 0;
292}
293
294/**
295 *	aac_sa_ioremap
296 *	@size: mapping resize request
297 *
298 */
299static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
300{
301	if (!size) {
302		iounmap(dev->regs.sa);
303		return 0;
304	}
305	dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
306	return (dev->base == NULL) ? -1 : 0;
307}
308
309/**
310 *	aac_sa_init	-	initialize an ARM based AAC card
311 *	@dev: device to configure
312 *
313 *	Allocate and set up resources for the ARM based AAC variants. The
314 *	device_interface in the commregion will be allocated and linked
315 *	to the comm region.
316 */
317
318int aac_sa_init(struct aac_dev *dev)
319{
320	unsigned long start;
321	unsigned long status;
322	int instance;
323	const char *name;
324
325	instance = dev->id;
326	name     = dev->name;
327
328	if (aac_sa_ioremap(dev, dev->base_size)) {
329		printk(KERN_WARNING "%s: unable to map adapter.\n", name);
330		goto error_iounmap;
331	}
332
333	/*
334	 *	Check to see if the board failed any self tests.
335	 */
336	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
337		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
338		goto error_iounmap;
339	}
340	/*
341	 *	Check to see if the board panic'd while booting.
342	 */
343	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
344		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
345		goto error_iounmap;
346	}
347	start = jiffies;
348	/*
349	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
350	 */
351	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
352		if (time_after(jiffies, start+startup_timeout*HZ)) {
353			status = sa_readl(dev, Mailbox7);
354			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
355					name, instance, status);
356			goto error_iounmap;
357		}
358		msleep(1);
359	}
360
361	/*
362	 *	Fill in the function dispatch table.
363	 */
364
365	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
366	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
367	dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
368	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
369	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
370	dev->a_ops.adapter_check_health = aac_sa_check_health;
371	dev->a_ops.adapter_intr = aac_sa_intr;
372	dev->a_ops.adapter_ioremap = aac_sa_ioremap;
373
374	/*
375	 *	First clear out all interrupts.  Then enable the one's that
376	 *	we can handle.
377	 */
378	aac_adapter_disable_int(dev);
379	aac_adapter_enable_int(dev);
380
381	if(aac_init_adapter(dev) == NULL)
382		goto error_irq;
383	if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
384			IRQF_SHARED|IRQF_DISABLED,
385			"aacraid", (void *)dev ) < 0) {
386		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
387			name, instance);
388		goto error_iounmap;
389	}
390	aac_adapter_enable_int(dev);
391
392	/*
393	 *	Tell the adapter that all is configure, and it can start
394	 *	accepting requests
395	 */
396	aac_sa_start_adapter(dev);
397	return 0;
398
399error_irq:
400	aac_sa_disable_interrupt(dev);
401	free_irq(dev->scsi_host_ptr->irq, (void *)dev);
402
403error_iounmap:
404
405	return -1;
406}
407
408