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/*
* 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;
}
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