Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 441 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/rx.c b/drivers/scsi/aacraid/rx.c
new file mode 100644
index 000000000000..630b99e1fe83
--- /dev/null
+++ b/drivers/scsi/aacraid/rx.c
@@ -0,0 +1,441 @@
+/*
+ *	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;
+	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 = ~(dev->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) {
+			rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
+			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
+		}
+		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, DoorBellAdapterNormCmdNotFull);
+			rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
+		}
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+/**
+ *	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 *status)
+{
+	unsigned long start;
+	int ok;
+	/*
+	 *	Write the command into Mailbox 0
+	 */
+	rx_writel(dev, InboundMailbox0, command);
+	/*
+	 *	Write the parameters into Mailboxes 1 - 4
+	 */
+	rx_writel(dev, InboundMailbox1, 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, dev->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(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 
+		 */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+	if (ok != 1) {
+		/*
+		 *	Restore interrupt mask even though we timed out
+		 */
+		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]);
+	/*
+	 *	Clear the synch command doorbell.
+	 */
+	rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
+	/*
+	 *	Restore interrupt mask
+	 */
+	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)
+{
+	u32 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)
+{
+	u32 status;
+	struct aac_init *init;
+
+	init = dev->init;
+	init->HostElapsedSeconds = cpu_to_le32(get_seconds());
+	/*
+	 *	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, dev->OIMR = 0xfb);
+
+	// We can only use a 32 bit address here
+	rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
+}
+
+/**
+ *	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 {
+			u32 Post_Command;
+			u32 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, &status);
+		pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
+		  post, paddr);
+		if ((buffer[0] == '0') && (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_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;
+
+	/*
+	 *	Map in the registers from the adapter.
+	 */
+	if((dev->regs.rx = 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, 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+180*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;
+		}
+		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);
+		goto error_iounmap;
+	}
+	/*
+	 *	Fill in the function dispatch table.
+	 */
+	dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
+	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;
+
+	if (aac_init_adapter(dev) == NULL)
+		goto error_irq;
+	/*
+	 *	Start any kernel threads needed
+	 */
+	dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
+	if(dev->thread_pid < 0)
+	{
+		printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
+		goto error_kfree;
+	}
+	/*
+	 *	Tell the adapter that all is configured, and it can start
+	 *	accepting requests
+	 */
+	aac_rx_start_adapter(dev);
+	return 0;
+
+error_kfree:
+	kfree(dev->queues);
+
+error_irq:
+	free_irq(dev->scsi_host_ptr->irq, (void *)dev);
+
+error_iounmap:
+	iounmap(dev->regs.rx);
+
+	return -1;
+}