patch-2.4.17 linux/drivers/scsi/aacraid/rx.c

• Lines: 414
• Date: Fri Dec 21 16:40:32 2001
• Orig file: linux-2.4.16/drivers/scsi/aacraid/rx.c
• Orig date: Thu Jan 1 00:00:00 1970

diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/drivers/scsi/aacraid/rx.c linux/drivers/scsi/aacraid/rx.c
@@ -0,0 +1,413 @@
+/*
+ *	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/config.h>
+#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/blk.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <asm/semaphore.h>
+#include "scsi.h"
+#include "hosts.h"
+
+#include "aacraid.h"
+
+static void aac_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct aac_dev *dev = dev_id;
+	unsigned long bellbits;
+	u8 intstat, mask;
+
+	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.
+	 */
+	mask = ~(rx_readb(dev, MUnit.OIMR));
+	/* Check to see if this is our interrupt.  If it isn't just return */
+	if (intstat & mask) 
+	{
+		bellbits = rx_readl(dev, OutboundDoorbellReg);
+		if (bellbits & DoorBellPrintfReady)
+		{
+			aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
+			rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
+			rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
+		}
+		else if (bellbits & DoorBellAdapterNormCmdReady)
+		{
+			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
+			rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
+		}
+		else if (bellbits & DoorBellAdapterNormRespReady) 
+		{
+			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
+			rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
+		}
+		else if (bellbits & DoorBellAdapterNormCmdNotFull)
+		{
+			rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
+		}
+		else if (bellbits & DoorBellAdapterNormRespNotFull)
+		{
+			rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
+		}
+	}
+}
+
+/**
+ *	aac_rx_enable_interrupt	-	Enable event reporting
+ *	@dev: Adapter
+ *	@event: Event to enable
+ *
+ *	Enable event reporting from the i960 for a given event.
+ */
+ 
+static void aac_rx_enable_interrupt(struct aac_dev * dev, u32 event)
+{
+	switch (event) {
+
+	case HostNormCmdQue:
+		dev->irq_mask &= ~(OUTBOUNDDOORBELL_1);
+		break;
+
+	case HostNormRespQue:
+		dev->irq_mask &= ~(OUTBOUNDDOORBELL_2);
+		break;
+
+	case AdapNormCmdNotFull:
+		dev->irq_mask &= ~(OUTBOUNDDOORBELL_3);
+		break;
+
+	case AdapNormRespNotFull:
+		dev->irq_mask &= ~(OUTBOUNDDOORBELL_4);
+		break;
+	}
+}
+
+/**
+ *	aac_rx_disable_interrupt	-	Disable event reporting
+ *	@dev: Adapter
+ *	@event: Event to enable
+ *
+ *	Disable event reporting from the i960 for a given event.
+ */
+
+static void aac_rx_disable_interrupt(struct aac_dev *dev, u32 event)
+{
+	switch (event) {
+
+	case HostNormCmdQue:
+		dev->irq_mask |= (OUTBOUNDDOORBELL_1);
+		break;
+
+	case HostNormRespQue:
+		dev->irq_mask |= (OUTBOUNDDOORBELL_2);
+		break;
+
+	case AdapNormCmdNotFull:
+		dev->irq_mask |= (OUTBOUNDDOORBELL_3);
+		break;
+
+	case AdapNormRespNotFull:
+		dev->irq_mask |= (OUTBOUNDDOORBELL_4);
+		break;
+	}
+}
+
+/**
+ *	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 comamnd to the adapter and wait 
+ *	for its	completion.
+ */
+
+static int rx_sync_cmd(struct aac_dev *dev, unsigned long command, unsigned long p1, unsigned long *status)
+{
+	unsigned long start;
+	int ok;
+	/*
+	 *	Write the command into Mailbox 0
+	 */
+	rx_writel(dev, InboundMailbox0, cpu_to_le32(command));
+	/*
+	 *	Write the parameters into Mailboxes 1 - 4
+	 */
+	rx_writel(dev, InboundMailbox1, cpu_to_le32(p1));
+	rx_writel(dev, InboundMailbox2, 0);
+	rx_writel(dev, InboundMailbox3, 0);
+	rx_writel(dev, InboundMailbox4, 0);
+	/*
+	 *	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, rx_readb(dev, MUnit.OIMR) | 0x04);
+	/*
+	 *	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(start+30*HZ, jiffies)) 
+	{
+		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 
+		 */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+	if (ok != 1) {
+		/*
+		 *	Restore interrupt mask even though we timed out
+		 */
+		rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.OIMR) & 0xfb);
+		return -ETIMEDOUT;
+	}
+	/*
+	 *	Pull the synch status from Mailbox 0.
+	 */
+	*status = le32_to_cpu(rx_readl(dev, IndexRegs.Mailbox[0]));
+	/*
+	 *	Clear the synch command doorbell.
+	 */
+	rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
+	/*
+	 *	Restore interrupt mask
+	 */
+	rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.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)
+{
+	unsigned long ret;
+	rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
+}
+
+/**
+ *	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, &ret);
+		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)
+{
+	unsigned long status;
+	struct aac_init *init;
+
+	init = dev->init;
+	init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
+	/*
+	 *	Tell the adapter we are back and up and running so it will scan
+	 *	its command queues and enable our interrupts
+	 */
+	dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
+	/*
+	 *	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, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
+	rx_writeb(dev, MUnit.OIMR, 0xfb);
+
+	rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (unsigned long) dev->init_pa, &status);
+}
+
+/**
+ *	aac_rx_init	-	initialize an i960 based AAC card
+ *	@dev: device to configure
+ *	@devnum: adapter number
+ *
+ *	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 num)
+{
+	unsigned long start;
+	unsigned long status;
+	int instance;
+	const char * name;
+
+	dev->devnum = num;
+
+	instance = dev->id;
+	name     = dev->name;
+
+	/*
+	 *	Map in the registers from the adapter.
+	 */
+	if((dev->regs.rx = (struct rx_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
+	{	
+		printk(KERN_WARNING "aacraid: unable to map i960.\n" );
+		return -1;
+	}
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (rx_readl(dev, IndexRegs.Mailbox[7]) & SELF_TEST_FAILED) {
+		printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
+		return -1;
+	}
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_PANIC) {
+		printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
+		return -1;
+	}
+	start = jiffies;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 30 seconds.
+	 */
+	while (!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING)) 
+	{
+		if(time_after(jiffies, start+30*HZ))
+		{
+			status = rx_readl(dev, IndexRegs.Mailbox[7]) >> 16;
+			printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %ld.\n", dev->name, instance, status);
+			return -1;
+		}
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+	if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0) 
+	{
+		printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
+		return -1;
+	}
+	/*
+	 *	Fill in the function dispatch table.
+	 */
+	dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
+	dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt;
+	dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
+	dev->a_ops.adapter_notify = aac_rx_notify_adapter;
+
+	if (aac_init_adapter(dev) == NULL)
+		return -1;
+	/*
+	 *	Start any kernel threads needed
+	 */
+	dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
+	/*
+	 *	Tell the adapter that all is configured, and it can start
+	 *	accepting requests
+	 */
+	aac_rx_start_adapter(dev);
+	return 0;
+}