/*
* 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:
* sa.c
*
* Abstract: Drawbridge specific support functions
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.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_sa_intr(int irq, void *dev_id)
{
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, 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
sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
} else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready
sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
} 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);
}
return IRQ_HANDLED;
}
return IRQ_NONE;
}
/**
* aac_sa_disable_interrupt - disable interrupt
* @dev: Which adapter to enable.
*/
static void aac_sa_disable_interrupt (struct aac_dev *dev)
{
sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
}
/**
* aac_sa_enable_interrupt - enable interrupt
* @dev: Which adapter to enable.
*/
static void aac_sa_enable_interrupt (struct aac_dev *dev)
{
sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
}
/**
* aac_sa_notify_adapter - handle adapter notification
* @dev: Adapter that notification is for
* @event: Event to notidy
*
* Notify the adapter of an event
*/
static 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, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
*/
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 command to the adapter and wait
* for its completion.
*/
static int sa_sync_cmd(struct aac_dev *dev, u32 command,
u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
{
unsigned long start;
int ok;
/*
* Write the Command into Mailbox 0
*/
sa_writel(dev, Mailbox0, command);
/*
* Write the parameters into Mailboxes 1 - 4
*/
sa_writel(dev, Mailbox1, p1);
sa_writel(dev, Mailbox2, p2);
sa_writel(dev, Mailbox3, p3);
sa_writel(dev, Mailbox4, p4);
/*
* 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;
}
msleep(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.
*/
if (ret)
*ret = sa_readl(dev, Mailbox0);
if (r1)
*r1 = sa_readl(dev, Mailbox1);
if (r2)
*r2 = sa_readl(dev, Mailbox2);
if (r3)
*r3 = sa_readl(dev, Mailbox3);
if (r4)
*r4 = sa_readl(dev, Mailbox4);
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)
{
sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
/**
* 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)
{
struct aac_init *init;
/*
* Fill in the remaining pieces of the init.
*/
init = dev->init;
init->HostElapsedSeconds = cpu_to_le32(get_seconds());
/* We can only use a 32 bit address here */
sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
/**
* aac_sa_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_sa_check_health(struct aac_dev *dev)
{
long status = sa_readl(dev, Mailbox7);
/*
* 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 while booting.
*/
if (status & KERNEL_PANIC)
return -2;
/*
* Wait for the adapter to be up and running. Wait up to 3 minutes
*/
if (!(status & KERNEL_UP_AND_RUNNING))
return -3;
/*
* Everything is OK
*/
return 0;
}
/**
* aac_sa_ioremap
* @size: mapping resize request
*
*/
static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
{
if (!size) {
iounmap(dev->regs.sa);
return 0;
}
dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
return (dev->base == NULL) ? -1 : 0;
}
/**
* aac_sa_init - initialize an ARM based AAC card
* @dev: device to configure
*
* 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 start;
unsigned long status;
int instance;
const char *name;
instance = dev->id;
name = dev->name;
if (aac_sa_ioremap(dev, dev->base_size)) {
printk(KERN_WARNING "%s: unable to map adapter.\n", name);
goto error_iounmap;
}
/*
* 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);
goto error_iounmap;
}
/*
* 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);
goto error_iounmap;
}
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(jiffies, start+startup_timeout*HZ)) {
status = sa_readl(dev, Mailbox7);
printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
name, instance, status);
goto error_iounmap;
}
msleep(1);
}
/*
* Fill in the function dispatch table.
*/
dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
dev->a_ops.adapter_notify = aac_sa_notify_adapter;
dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
dev->a_ops.adapter_check_health = aac_sa_check_health;
dev->a_ops.adapter_intr = aac_sa_intr;
dev->a_ops.adapter_ioremap = aac_sa_ioremap;
/*
* First clear out all interrupts. Then enable the one's that
* we can handle.
*/
aac_adapter_disable_int(dev);
aac_adapter_enable_int(dev);
if(aac_init_adapter(dev) == NULL)
goto error_irq;
if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
IRQF_SHARED|IRQF_DISABLED,
"aacraid", (void *)dev ) < 0) {
printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
name, instance);
goto error_iounmap;
}
aac_adapter_enable_int(dev);
/*
* Tell the adapter that all is configure, and it can start
* accepting requests
*/
aac_sa_start_adapter(dev);
return 0;
error_irq:
aac_sa_disable_interrupt(dev);
free_irq(dev->scsi_host_ptr->irq, (void *)dev);
error_iounmap:
return -1;
}
