sa.c revision 5a0e3ad6af8660be21ca98a971cd00f331318c05 
1/*
2 *	Adaptec AAC series RAID controller driver
3 *	(c) Copyright 2001 Red Hat Inc.
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/blkdev.h>
37#include <linux/delay.h>
38#include <linux/completion.h>
39#include <linux/time.h>
40#include <linux/interrupt.h>
41
42#include <scsi/scsi_host.h>
43
44#include "aacraid.h"
45
46static irqreturn_t aac_sa_intr(int irq, void *dev_id)
47{
48	struct aac_dev *dev = dev_id;
49	unsigned short intstat, mask;
50
51	intstat = sa_readw(dev, DoorbellReg_p);
52	/*
53	 *	Read mask and invert because drawbridge is reversed.
54	 *	This allows us to only service interrupts that have been enabled.
55	 */
56	mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
57
58	/* Check to see if this is our interrupt.  If it isn't just return */
59
60	if (intstat & mask) {
61		if (intstat & PrintfReady) {
62			aac_printf(dev, sa_readl(dev, Mailbox5));
63			sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
64			sa_writew(dev, DoorbellReg_s, PrintfDone);
65		} else if (intstat & DOORBELL_1) {	// dev -> Host Normal Command Ready
66			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
67			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
68		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
69			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
70			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
71		} else if (intstat & DOORBELL_3) {	// dev -> Host Normal Command Not Full
72			sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
73		} else if (intstat & DOORBELL_4) {	// dev -> Host Normal Response Not Full
74			sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
75		}
76		return IRQ_HANDLED;
77	}
78	return IRQ_NONE;
79}
80
81/**
82 *	aac_sa_disable_interrupt	-	disable interrupt
83 *	@dev: Which adapter to enable.
84 */
85
86static void aac_sa_disable_interrupt (struct aac_dev *dev)
87{
88	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
89}
90
91/**
92 *	aac_sa_enable_interrupt	-	enable interrupt
93 *	@dev: Which adapter to enable.
94 */
95
96static void aac_sa_enable_interrupt (struct aac_dev *dev)
97{
98	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
99				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
100}
101
102/**
103 *	aac_sa_notify_adapter		-	handle adapter notification
104 *	@dev:	Adapter that notification is for
105 *	@event:	Event to notidy
106 *
107 *	Notify the adapter of an event
108 */
109
110static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
111{
112	switch (event) {
113
114	case AdapNormCmdQue:
115		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
116		break;
117	case HostNormRespNotFull:
118		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
119		break;
120	case AdapNormRespQue:
121		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
122		break;
123	case HostNormCmdNotFull:
124		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
125		break;
126	case HostShutdown:
127		/*
128		sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
129		NULL, NULL, NULL, NULL, NULL);
130		*/
131		break;
132	case FastIo:
133		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
134		break;
135	case AdapPrintfDone:
136		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
137		break;
138	default:
139		BUG();
140		break;
141	}
142}
143
144
145/**
146 *	sa_sync_cmd	-	send a command and wait
147 *	@dev: Adapter
148 *	@command: Command to execute
149 *	@p1: first parameter
150 *	@ret: adapter status
151 *
152 *	This routine will send a synchronous command to the adapter and wait
153 *	for its	completion.
154 */
155
156static int sa_sync_cmd(struct aac_dev *dev, u32 command,
157		u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
158		u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
159{
160	unsigned long start;
161 	int ok;
162	/*
163	 *	Write the Command into Mailbox 0
164	 */
165	sa_writel(dev, Mailbox0, command);
166	/*
167	 *	Write the parameters into Mailboxes 1 - 4
168	 */
169	sa_writel(dev, Mailbox1, p1);
170	sa_writel(dev, Mailbox2, p2);
171	sa_writel(dev, Mailbox3, p3);
172	sa_writel(dev, Mailbox4, p4);
173
174	/*
175	 *	Clear the synch command doorbell to start on a clean slate.
176	 */
177	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
178	/*
179	 *	Signal that there is a new synch command
180	 */
181	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
182
183	ok = 0;
184	start = jiffies;
185
186	while(time_before(jiffies, start+30*HZ))
187	{
188		/*
189		 *	Delay 5uS so that the monitor gets access
190		 */
191		udelay(5);
192		/*
193		 *	Mon110 will set doorbell0 bit when it has
194		 *	completed the command.
195		 */
196		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
197			ok = 1;
198			break;
199		}
200		msleep(1);
201	}
202
203	if (ok != 1)
204		return -ETIMEDOUT;
205	/*
206	 *	Clear the synch command doorbell.
207	 */
208	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
209	/*
210	 *	Pull the synch status from Mailbox 0.
211	 */
212	if (ret)
213		*ret = sa_readl(dev, Mailbox0);
214	if (r1)
215		*r1 = sa_readl(dev, Mailbox1);
216	if (r2)
217		*r2 = sa_readl(dev, Mailbox2);
218	if (r3)
219		*r3 = sa_readl(dev, Mailbox3);
220	if (r4)
221		*r4 = sa_readl(dev, Mailbox4);
222	return 0;
223}
224
225/**
226 *	aac_sa_interrupt_adapter	-	interrupt an adapter
227 *	@dev: Which adapter to enable.
228 *
229 *	Breakpoint an adapter.
230 */
231
232static void aac_sa_interrupt_adapter (struct aac_dev *dev)
233{
234	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
235			NULL, NULL, NULL, NULL, NULL);
236}
237
238/**
239 *	aac_sa_start_adapter		-	activate adapter
240 *	@dev:	Adapter
241 *
242 *	Start up processing on an ARM based AAC adapter
243 */
244
245static void aac_sa_start_adapter(struct aac_dev *dev)
246{
247	struct aac_init *init;
248	/*
249	 * Fill in the remaining pieces of the init.
250	 */
251	init = dev->init;
252	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
253	/* We can only use a 32 bit address here */
254	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
255			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
256			NULL, NULL, NULL, NULL, NULL);
257}
258
259static int aac_sa_restart_adapter(struct aac_dev *dev, int bled)
260{
261	return -EINVAL;
262}
263
264/**
265 *	aac_sa_check_health
266 *	@dev: device to check if healthy
267 *
268 *	Will attempt to determine if the specified adapter is alive and
269 *	capable of handling requests, returning 0 if alive.
270 */
271static int aac_sa_check_health(struct aac_dev *dev)
272{
273	long status = sa_readl(dev, Mailbox7);
274
275	/*
276	 *	Check to see if the board failed any self tests.
277	 */
278	if (status & SELF_TEST_FAILED)
279		return -1;
280	/*
281	 *	Check to see if the board panic'd while booting.
282	 */
283	if (status & KERNEL_PANIC)
284		return -2;
285	/*
286	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
287	 */
288	if (!(status & KERNEL_UP_AND_RUNNING))
289		return -3;
290	/*
291	 *	Everything is OK
292	 */
293	return 0;
294}
295
296/**
297 *	aac_sa_ioremap
298 *	@size: mapping resize request
299 *
300 */
301static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
302{
303	if (!size) {
304		iounmap(dev->regs.sa);
305		return 0;
306	}
307	dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
308	return (dev->base == NULL) ? -1 : 0;
309}
310
311/**
312 *	aac_sa_init	-	initialize an ARM based AAC card
313 *	@dev: device to configure
314 *
315 *	Allocate and set up resources for the ARM based AAC variants. The
316 *	device_interface in the commregion will be allocated and linked
317 *	to the comm region.
318 */
319
320int aac_sa_init(struct aac_dev *dev)
321{
322	unsigned long start;
323	unsigned long status;
324	int instance;
325	const char *name;
326
327	instance = dev->id;
328	name     = dev->name;
329
330	if (aac_sa_ioremap(dev, dev->base_size)) {
331		printk(KERN_WARNING "%s: unable to map adapter.\n", name);
332		goto error_iounmap;
333	}
334
335	/*
336	 *	Check to see if the board failed any self tests.
337	 */
338	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
339		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
340		goto error_iounmap;
341	}
342	/*
343	 *	Check to see if the board panic'd while booting.
344	 */
345	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
346		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
347		goto error_iounmap;
348	}
349	start = jiffies;
350	/*
351	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
352	 */
353	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
354		if (time_after(jiffies, start+startup_timeout*HZ)) {
355			status = sa_readl(dev, Mailbox7);
356			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
357					name, instance, status);
358			goto error_iounmap;
359		}
360		msleep(1);
361	}
362
363	/*
364	 *	Fill in the function dispatch table.
365	 */
366
367	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
368	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
369	dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
370	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
371	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
372	dev->a_ops.adapter_check_health = aac_sa_check_health;
373	dev->a_ops.adapter_restart = aac_sa_restart_adapter;
374	dev->a_ops.adapter_intr = aac_sa_intr;
375	dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
376	dev->a_ops.adapter_ioremap = aac_sa_ioremap;
377
378	/*
379	 *	First clear out all interrupts.  Then enable the one's that
380	 *	we can handle.
381	 */
382	aac_adapter_disable_int(dev);
383	aac_adapter_enable_int(dev);
384
385	if(aac_init_adapter(dev) == NULL)
386		goto error_irq;
387	if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
388			IRQF_SHARED|IRQF_DISABLED,
389			"aacraid", (void *)dev ) < 0) {
390		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
391			name, instance);
392		goto error_iounmap;
393	}
394	aac_adapter_enable_int(dev);
395
396	/*
397	 *	Tell the adapter that all is configure, and it can start
398	 *	accepting requests
399	 */
400	aac_sa_start_adapter(dev);
401	return 0;
402
403error_irq:
404	aac_sa_disable_interrupt(dev);
405	free_irq(dev->pdev->irq, (void *)dev);
406
407error_iounmap:
408
409	return -1;
410}
411
412