patch-2.4.17 linux/drivers/scsi/aacraid/sap1sup.c

• Lines: 395
• Date: Fri Dec 21 16:40:32 2001
• Orig file: linux-2.4.16/drivers/scsi/aacraid/sap1sup.c
• Orig date: Thu Jan 1 00:00:00 1970

diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/drivers/scsi/aacraid/sap1sup.c linux/drivers/scsi/aacraid/sap1sup.c
@@ -0,0 +1,394 @@
+/*
+ *	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:
+ *  sap1sup.c
+ *
+ * Abstract: Drawbridge specific support 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_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct aac_dev *dev = dev_id;
+	unsigned short intstat, mask;
+
+	intstat = sa_readw(dev, DoorbellReg_p);
+	/*
+	 *	Read mask and invert because drawbridge is reversed.
+	 *	This allows us to only service interrupts that have been enabled.
+	 */
+	mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
+
+	/* Check to see if this is our interrupt.  If it isn't just return */
+
+	if (intstat & mask) {
+		if (intstat & PrintfReady) {
+			aac_printf(dev, le32_to_cpu(sa_readl(dev, Mailbox5)));
+			sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
+			sa_writew(dev, DoorbellReg_s, PrintfDone);
+		} else if (intstat & DOORBELL_1) {	// dev -> Host Normal Command Ready
+			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
+		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
+			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
+		} else if (intstat & DOORBELL_3) {	// dev -> Host Normal Command Not Full
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
+		} else if (intstat & DOORBELL_4) {	// dev -> Host Normal Response Not Full
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
+		}
+	}
+}
+
+/**
+ *	aac_sa_enable_interrupt	-	enable an interrupt event
+ *	@dev: Which adapter to enable.
+ *	@event: Which adapter event.
+ *
+ *	This routine will enable the corresponding adapter event to cause an interrupt on 
+ * 	the host.
+ */
+ 
+void aac_sa_enable_interrupt(struct aac_dev *dev, u32 event)
+{
+	switch (event) {
+
+	case HostNormCmdQue:
+		sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_1);
+		break;
+
+	case HostNormRespQue:
+		sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_2);
+		break;
+
+	case AdapNormCmdNotFull:
+		sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_3);
+		break;
+
+	case AdapNormRespNotFull:
+		sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_4);
+		break;
+	}
+}
+
+/**
+ *	aac_sa_disable_interrupt	-	disable an interrupt event
+ *	@dev: Which adapter to enable.
+ *	@event: Which adapter event.
+ *
+ *	This routine will enable the corresponding adapter event to cause an interrupt on 
+ * 	the host.
+ */
+
+void aac_sa_disable_interrupt (struct aac_dev *dev, u32 event)
+{
+	switch (event) {
+
+	case HostNormCmdQue:
+		sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_1);
+		break;
+
+	case HostNormRespQue:
+		sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_2);
+		break;
+
+	case AdapNormCmdNotFull:
+		sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_3);
+		break;
+
+	case AdapNormRespNotFull:
+		sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_4);
+		break;
+	}
+}
+
+/**
+ *	aac_sa_notify_adapter		-	handle adapter notification
+ *	@dev:	Adapter that notification is for
+ *	@event:	Event to notidy
+ *
+ *	Notify the adapter of an event
+ */
+ 
+void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
+{
+	switch (event) {
+
+	case AdapNormCmdQue:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
+		break;
+	case HostNormRespNotFull:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
+		break;
+	case AdapNormRespQue:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
+		break;
+	case HostNormCmdNotFull:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
+		break;
+	case HostShutdown:
+		//sa_sync_cmd(dev, HOST_CRASHING, 0, &ret);
+		break;
+	case FastIo:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
+		break;
+	case AdapPrintfDone:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
+		break;
+	default:
+		BUG();
+		break;
+	}
+}
+
+
+/**
+ *	sa_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 sa_sync_cmd(struct aac_dev *dev, unsigned long command, unsigned long p1, unsigned long *ret)
+{
+	unsigned long start;
+ 	int ok;
+	/*
+	 *	Write the Command into Mailbox 0
+	 */
+	sa_writel(dev, Mailbox0, cpu_to_le32(command));
+	/*
+	 *	Write the parameters into Mailboxes 1 - 4
+	 */
+	sa_writel(dev, Mailbox1, cpu_to_le32(p1));
+	sa_writel(dev, Mailbox2, 0);
+	sa_writel(dev, Mailbox3, 0);
+	sa_writel(dev, Mailbox4, 0);
+	/*
+	 *	Clear the synch command doorbell to start on a clean slate.
+	 */
+	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+	/*
+	 *	Signal that there is a new synch command
+	 */
+	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
+
+	ok = 0;
+	start = jiffies;
+
+	while(time_before(jiffies, start+30*HZ))
+	{
+		/*
+		 *	Delay 5uS so that the monitor gets access
+		 */
+		udelay(5);
+		/*
+		 *	Mon110 will set doorbell0 bit when it has 
+		 *	completed the command.
+		 */
+		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
+			ok = 1;
+			break;
+		}
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+
+	if (ok != 1)
+		return -ETIMEDOUT;
+	/*
+	 *	Clear the synch command doorbell.
+	 */
+	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+	/*
+	 *	Pull the synch status from Mailbox 0.
+	 */
+	*ret = le32_to_cpu(sa_readl(dev, Mailbox0));
+	return 0;
+}
+
+/**
+ *	aac_sa_interrupt_adapter	-	interrupt an adapter
+ *	@dev: Which adapter to enable.
+ *
+ *	Breakpoint an adapter.
+ */
+ 
+static void aac_sa_interrupt_adapter (struct aac_dev *dev)
+{
+	unsigned long ret;
+	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
+}
+
+/**
+ *	aac_sa_start_adapter		-	activate adapter
+ *	@dev:	Adapter
+ *
+ *	Start up processing on an ARM based AAC adapter
+ */
+
+static void aac_sa_start_adapter(struct aac_dev *dev)
+{
+	unsigned long ret;
+	struct aac_init *init;
+	/*
+	 * Fill in the remaining pieces of the init.
+	 */
+	init = dev->init;
+	init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
+
+	dprintk(("INIT\n"));
+	/*
+	 * Tell the adapter we are back and up and running so it will scan its command
+	 * queues and enable our interrupts
+	 */
+	dev->irq_mask =	(PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
+	/*
+	 *	First clear out all interrupts.  Then enable the one's that 
+	 *	we can handle.
+	 */
+	dprintk(("MASK\n"));
+	sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff));
+	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
+	dprintk(("SYNCCMD\n"));
+	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (unsigned long) dev->init_pa, &ret);
+}
+
+/**
+ *	aac_sa_init	-	initialize an ARM based AAC card
+ *	@dev: device to configure
+ *	@devnum: adapter number
+ *
+ *	Allocate and set up resources for the ARM based AAC variants. The 
+ *	device_interface in the commregion will be allocated and linked 
+ *	to the comm region.
+ */
+
+int aac_sa_init(struct aac_dev *dev, unsigned long devnum)
+{
+	unsigned long start;
+	unsigned long status;
+	int instance;
+	const char *name;
+
+	dev->devnum = devnum;
+
+	dprintk(("PREINST\n"));
+	instance = dev->id;
+	name     = dev->name;
+
+	/*
+	 *	Map in the registers from the adapter.
+	 */
+	dprintk(("PREMAP\n"));
+
+	if((dev->regs.sa = (struct sa_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
+	{	
+		printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
+		return -1;
+	}
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
+		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
+		return -1;
+	}
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
+		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
+		return -1;
+	}
+	start = jiffies;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
+	 */
+	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
+		if (time_after(start+180*HZ, jiffies)) {
+			status = sa_readl(dev, Mailbox7) >> 16;
+			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %d.\n", name, instance, le32_to_cpu(status));
+			return -1;
+		}
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+
+	dprintk(("ATIRQ\n"));
+	if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
+		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
+		return -1;
+	}
+
+	/*
+	 *	Fill in the function dispatch table.
+	 */
+
+	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
+	dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
+	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
+	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
+
+	dprintk(("FUNCDONE\n"));
+
+	if(aac_init_adapter(dev) == NULL)
+		return -1;
+
+	dprintk(("NEWADAPTDONE\n"));
+	/*
+	 *	Start any kernel threads needed
+	 */
+	dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
+	/*
+	 *	Tell the adapter that all is configure, and it can start 
+	 *	accepting requests
+	 */
+	dprintk(("STARTING\n"));
+	aac_sa_start_adapter(dev);
+	dprintk(("STARTED\n"));
+	return 0;
+}
+