summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/aacraid/rx.c
blob: 035018db69b1b8fb85dd89a8d5252981f9f0f7d6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
/*
 *	Adaptec AAC series RAID controller driver
 *	(c) Copyright 2001 Red Hat Inc.	<alan@redhat.com>
 *
 * based on the old aacraid driver that is..
 * Adaptec aacraid device driver for Linux.
 *
 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Module Name:
 *  rx.c
 *
 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/time.h>
#include <linux/interrupt.h>
#include <asm/semaphore.h>

#include <scsi/scsi_host.h>

#include "aacraid.h"

static irqreturn_t aac_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
{
	struct aac_dev *dev = dev_id;

	dprintk((KERN_DEBUG "aac_rx_intr(%d,%p,%p)\n", irq, dev_id, regs));
	if (dev->new_comm_interface) {
		u32 Index = rx_readl(dev, MUnit.OutboundQueue);
		if (Index == 0xFFFFFFFFL)
			Index = rx_readl(dev, MUnit.OutboundQueue);
		if (Index != 0xFFFFFFFFL) {
			do {
				if (aac_intr_normal(dev, Index)) {
					rx_writel(dev, MUnit.OutboundQueue, Index);
					rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
				}
				Index = rx_readl(dev, MUnit.OutboundQueue);
			} while (Index != 0xFFFFFFFFL);
			return IRQ_HANDLED;
		}
	} else {
		unsigned long bellbits;
		u8 intstat;
		intstat = rx_readb(dev, MUnit.OISR);
		/*
		 *	Read mask and invert because drawbridge is reversed.
		 *	This allows us to only service interrupts that have 
		 *	been enabled.
		 *	Check to see if this is our interrupt.  If it isn't just return
		 */
		if (intstat & ~(dev->OIMR)) 
		{
			bellbits = rx_readl(dev, OutboundDoorbellReg);
			if (bellbits & DoorBellPrintfReady) {
				aac_printf(dev, rx_readl (dev, IndexRegs.Mailbox[5]));
				rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
				rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
			}
			else if (bellbits & DoorBellAdapterNormCmdReady) {
				rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
				aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
			}
			else if (bellbits & DoorBellAdapterNormRespReady) {
				rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
				aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
			}
			else if (bellbits & DoorBellAdapterNormCmdNotFull) {
				rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
			}
			else if (bellbits & DoorBellAdapterNormRespNotFull) {
				rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
				rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
			}
			return IRQ_HANDLED;
		}
	}
	return IRQ_NONE;
}

/**
 *	aac_rx_disable_interrupt	-	Disable interrupts
 *	@dev: Adapter
 */

static void aac_rx_disable_interrupt(struct aac_dev *dev)
{
	rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
}

/**
 *	rx_sync_cmd	-	send a command and wait
 *	@dev: Adapter
 *	@command: Command to execute
 *	@p1: first parameter
 *	@ret: adapter status
 *
 *	This routine will send a synchronous command to the adapter and wait 
 *	for its	completion.
 */

static int rx_sync_cmd(struct aac_dev *dev, u32 command,
	u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
	u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
{
	unsigned long start;
	int ok;
	/*
	 *	Write the command into Mailbox 0
	 */
	rx_writel(dev, InboundMailbox0, command);
	/*
	 *	Write the parameters into Mailboxes 1 - 6
	 */
	rx_writel(dev, InboundMailbox1, p1);
	rx_writel(dev, InboundMailbox2, p2);
	rx_writel(dev, InboundMailbox3, p3);
	rx_writel(dev, InboundMailbox4, p4);
	/*
	 *	Clear the synch command doorbell to start on a clean slate.
	 */
	rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
	/*
	 *	Disable doorbell interrupts
	 */
	rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
	/*
	 *	Force the completion of the mask register write before issuing
	 *	the interrupt.
	 */
	rx_readb (dev, MUnit.OIMR);
	/*
	 *	Signal that there is a new synch command
	 */
	rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);

	ok = 0;
	start = jiffies;

	/*
	 *	Wait up to 30 seconds
	 */
	while (time_before(jiffies, start+30*HZ)) 
	{
		udelay(5);	/* Delay 5 microseconds to let Mon960 get info. */
		/*
		 *	Mon960 will set doorbell0 bit when it has completed the command.
		 */
		if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
			/*
			 *	Clear the doorbell.
			 */
			rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
			ok = 1;
			break;
		}
		/*
		 *	Yield the processor in case we are slow 
		 */
		msleep(1);
	}
	if (ok != 1) {
		/*
		 *	Restore interrupt mask even though we timed out
		 */
		if (dev->new_comm_interface)
			rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
		else
			rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
		return -ETIMEDOUT;
	}
	/*
	 *	Pull the synch status from Mailbox 0.
	 */
	if (status)
		*status = rx_readl(dev, IndexRegs.Mailbox[0]);
	if (r1)
		*r1 = rx_readl(dev, IndexRegs.Mailbox[1]);
	if (r2)
		*r2 = rx_readl(dev, IndexRegs.Mailbox[2]);
	if (r3)
		*r3 = rx_readl(dev, IndexRegs.Mailbox[3]);
	if (r4)
		*r4 = rx_readl(dev, IndexRegs.Mailbox[4]);
	/*
	 *	Clear the synch command doorbell.
	 */
	rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
	/*
	 *	Restore interrupt mask
	 */
	if (dev->new_comm_interface)
		rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
	else
		rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
	return 0;

}

/**
 *	aac_rx_interrupt_adapter	-	interrupt adapter
 *	@dev: Adapter
 *
 *	Send an interrupt to the i960 and breakpoint it.
 */

static void aac_rx_interrupt_adapter(struct aac_dev *dev)
{
	rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}

/**
 *	aac_rx_notify_adapter		-	send an event to the adapter
 *	@dev: Adapter
 *	@event: Event to send
 *
 *	Notify the i960 that something it probably cares about has
 *	happened.
 */

static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
{
	switch (event) {

	case AdapNormCmdQue:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
		break;
	case HostNormRespNotFull:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
		break;
	case AdapNormRespQue:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
		break;
	case HostNormCmdNotFull:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
		break;
	case HostShutdown:
//		rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
//		  NULL, NULL, NULL, NULL, NULL);
		break;
	case FastIo:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
		break;
	case AdapPrintfDone:
		rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
		break;
	default:
		BUG();
		break;
	}
}

/**
 *	aac_rx_start_adapter		-	activate adapter
 *	@dev:	Adapter
 *
 *	Start up processing on an i960 based AAC adapter
 */

static void aac_rx_start_adapter(struct aac_dev *dev)
{
	struct aac_init *init;

	init = dev->init;
	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
	// We can only use a 32 bit address here
	rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
	  0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}

/**
 *	aac_rx_check_health
 *	@dev: device to check if healthy
 *
 *	Will attempt to determine if the specified adapter is alive and
 *	capable of handling requests, returning 0 if alive.
 */
static int aac_rx_check_health(struct aac_dev *dev)
{
	u32 status = rx_readl(dev, MUnit.OMRx[0]);

	/*
	 *	Check to see if the board failed any self tests.
	 */
	if (status & SELF_TEST_FAILED)
		return -1;
	/*
	 *	Check to see if the board panic'd.
	 */
	if (status & KERNEL_PANIC) {
		char * buffer;
		struct POSTSTATUS {
			__le32 Post_Command;
			__le32 Post_Address;
		} * post;
		dma_addr_t paddr, baddr;
		int ret;

		if ((status & 0xFF000000L) == 0xBC000000L)
			return (status >> 16) & 0xFF;
		buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
		ret = -2;
		if (buffer == NULL)
			return ret;
		post = pci_alloc_consistent(dev->pdev,
		  sizeof(struct POSTSTATUS), &paddr);
		if (post == NULL) {
			pci_free_consistent(dev->pdev, 512, buffer, baddr);
			return ret;
		}
		memset(buffer, 0, 512);
		post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
		post->Post_Address = cpu_to_le32(baddr);
		rx_writel(dev, MUnit.IMRx[0], paddr);
		rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
		  NULL, NULL, NULL, NULL, NULL);
		pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
		  post, paddr);
		if ((buffer[0] == '0') && ((buffer[1] == 'x') || (buffer[1] == 'X'))) {
			ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
			ret <<= 4;
			ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
		}
		pci_free_consistent(dev->pdev, 512, buffer, baddr);
		return ret;
	}
	/*
	 *	Wait for the adapter to be up and running.
	 */
	if (!(status & KERNEL_UP_AND_RUNNING))
		return -3;
	/*
	 *	Everything is OK
	 */
	return 0;
}

/**
 *	aac_rx_send
 *	@fib: fib to issue
 *
 *	Will send a fib, returning 0 if successful.
 */
static int aac_rx_send(struct fib * fib)
{
	u64 addr = fib->hw_fib_pa;
	struct aac_dev *dev = fib->dev;
	volatile void __iomem *device = dev->regs.rx;
	u32 Index;

	dprintk((KERN_DEBUG "%p->aac_rx_send(%p->%llx)\n", dev, fib, addr));
	Index = rx_readl(dev, MUnit.InboundQueue);
	if (Index == 0xFFFFFFFFL)
		Index = rx_readl(dev, MUnit.InboundQueue);
	dprintk((KERN_DEBUG "Index = 0x%x\n", Index));
	if (Index == 0xFFFFFFFFL)
		return Index;
	device += Index;
	dprintk((KERN_DEBUG "entry = %x %x %u\n", (u32)(addr & 0xffffffff),
	  (u32)(addr >> 32), (u32)le16_to_cpu(fib->hw_fib->header.Size)));
	writel((u32)(addr & 0xffffffff), device);
	device += sizeof(u32);
	writel((u32)(addr >> 32), device);
	device += sizeof(u32);
	writel(le16_to_cpu(fib->hw_fib->header.Size), device);
	rx_writel(dev, MUnit.InboundQueue, Index);
	dprintk((KERN_DEBUG "aac_rx_send - return 0\n"));
	return 0;
}

/**
 *	aac_rx_init	-	initialize an i960 based AAC card
 *	@dev: device to configure
 *
 *	Allocate and set up resources for the i960 based AAC variants. The 
 *	device_interface in the commregion will be allocated and linked 
 *	to the comm region.
 */

int aac_rx_init(struct aac_dev *dev)
{
	unsigned long start;
	unsigned long status;
	int instance;
	const char * name;

	instance = dev->id;
	name     = dev->name;

	/*
	 *	Check to see if the board panic'd while booting.
	 */
	/*
	 *	Check to see if the board failed any self tests.
	 */
	if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
		printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
		goto error_iounmap;
	}
	/*
	 *	Check to see if the board panic'd while booting.
	 */
	if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
		printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
		goto error_iounmap;
	}
	/*
	 *	Check to see if the monitor panic'd while booting.
	 */
	if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
		printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
		goto error_iounmap;
	}
	start = jiffies;
	/*
	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
	 */
	while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
		|| (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
	{
		if(time_after(jiffies, start+startup_timeout*HZ))
		{
			status = rx_readl(dev, IndexRegs.Mailbox[7]);
			printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", 
					dev->name, instance, status);
			goto error_iounmap;
		}
		msleep(1);
	}
	if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, IRQF_SHARED|IRQF_DISABLED, "aacraid", (void *)dev)<0)
	{
		printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
		goto error_iounmap;
	}
	/*
	 *	Fill in the function dispatch table.
	 */
	dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
	dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
	dev->a_ops.adapter_notify = aac_rx_notify_adapter;
	dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
	dev->a_ops.adapter_check_health = aac_rx_check_health;
	dev->a_ops.adapter_send = aac_rx_send;

	/*
	 *	First clear out all interrupts.  Then enable the one's that we
	 *	can handle.
	 */
	rx_writeb(dev, MUnit.OIMR, 0xff);
	rx_writel(dev, MUnit.ODR, 0xffffffff);
	rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);

	if (aac_init_adapter(dev) == NULL)
		goto error_irq;
	if (dev->new_comm_interface)
		rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);

	/*
	 *	Tell the adapter that all is configured, and it can start
	 *	accepting requests
	 */
	aac_rx_start_adapter(dev);
	return 0;

error_irq:
	rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
	free_irq(dev->scsi_host_ptr->irq, (void *)dev);

error_iounmap:

	return -1;
}