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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:
* 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(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, 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;
}
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