AcoSail/kernel_optimize_test
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kernel_optimize_test/drivers/scsi/aacraid/rkt.c
Mark Haverkamp 1241f3593a [SCSI] aacraid: General driver cleanup 
Received from Mark Salyzyn

Remove superfluous code, optimize code, harden code, cast code, correct
some text, use msleep instead of schedule_timeout_interruptible. No
bugs.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-04-13 10:13:19 -05:00

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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:
* rkt.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_rkt_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct aac_dev *dev = dev_id;
if (dev->new_comm_interface) {
u32 Index = rkt_readl(dev, MUnit.OutboundQueue);
if (Index == 0xFFFFFFFFL)
Index = rkt_readl(dev, MUnit.OutboundQueue);
if (Index != 0xFFFFFFFFL) {
do {
if (aac_intr_normal(dev, Index)) {
rkt_writel(dev, MUnit.OutboundQueue, Index);
rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
}
Index = rkt_readl(dev, MUnit.OutboundQueue);
} while (Index != 0xFFFFFFFFL);
return IRQ_HANDLED;
}
} else {
unsigned long bellbits;
u8 intstat;
intstat = rkt_readb(dev, MUnit.OISR);
/*
* Read mask and invert because drawbridge is reversed.
* This allows us to only service interrupts that have
* been enabled.
* Check to see if this is our interrupt. If it isn't just return
*/
if (intstat & ~(dev->OIMR))
{
bellbits = rkt_readl(dev, OutboundDoorbellReg);
if (bellbits & DoorBellPrintfReady) {
aac_printf(dev, rkt_readl (dev, IndexRegs.Mailbox[5]));
rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady);
rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
}
else if (bellbits & DoorBellAdapterNormCmdReady) {
rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
// rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
}
else if (bellbits & DoorBellAdapterNormRespReady) {
rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
}
else if (bellbits & DoorBellAdapterNormCmdNotFull) {
rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
}
else if (bellbits & DoorBellAdapterNormRespNotFull) {
rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
}
return IRQ_HANDLED;
}
}
return IRQ_NONE;
}
/**
* aac_rkt_disable_interrupt - Disable interrupts
* @dev: Adapter
*/
static void aac_rkt_disable_interrupt(struct aac_dev *dev)
{
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
}
/**
* rkt_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 rkt_sync_cmd(struct aac_dev *dev, u32 command,
u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
u32 *status, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
{
unsigned long start;
int ok;
/*
* Write the command into Mailbox 0
*/
rkt_writel(dev, InboundMailbox0, command);
/*
* Write the parameters into Mailboxes 1 - 6
*/
rkt_writel(dev, InboundMailbox1, p1);
rkt_writel(dev, InboundMailbox2, p2);
rkt_writel(dev, InboundMailbox3, p3);
rkt_writel(dev, InboundMailbox4, p4);
/*
* Clear the synch command doorbell to start on a clean slate.
*/
rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
/*
* Disable doorbell interrupts
*/
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
/*
* Force the completion of the mask register write before issuing
* the interrupt.
*/
rkt_readb (dev, MUnit.OIMR);
/*
* Signal that there is a new synch command
*/
rkt_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 (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
/*
* Clear the doorbell.
*/
rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
ok = 1;
break;
}
/*
* Yield the processor in case we are slow
*/
msleep(1);
}
if (ok != 1) {
/*
* Restore interrupt mask even though we timed out
*/
if (dev->new_comm_interface)
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
else
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
return -ETIMEDOUT;
}
/*
* Pull the synch status from Mailbox 0.
*/
if (status)
*status = rkt_readl(dev, IndexRegs.Mailbox[0]);
if (r1)
*r1 = rkt_readl(dev, IndexRegs.Mailbox[1]);
if (r2)
*r2 = rkt_readl(dev, IndexRegs.Mailbox[2]);
if (r3)
*r3 = rkt_readl(dev, IndexRegs.Mailbox[3]);
if (r4)
*r4 = rkt_readl(dev, IndexRegs.Mailbox[4]);
/*
* Clear the synch command doorbell.
*/
rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
/*
* Restore interrupt mask
*/
if (dev->new_comm_interface)
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
else
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
return 0;
}
/**
* aac_rkt_interrupt_adapter - interrupt adapter
* @dev: Adapter
*
* Send an interrupt to the i960 and breakpoint it.
*/
static void aac_rkt_interrupt_adapter(struct aac_dev *dev)
{
rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
/**
* aac_rkt_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_rkt_notify_adapter(struct aac_dev *dev, u32 event)
{
switch (event) {
case AdapNormCmdQue:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
break;
case HostNormRespNotFull:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
break;
case AdapNormRespQue:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
break;
case HostNormCmdNotFull:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
break;
case HostShutdown:
// rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
// NULL, NULL, NULL, NULL, NULL);
break;
case FastIo:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
break;
case AdapPrintfDone:
rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
break;
default:
BUG();
break;
}
}
/**
* aac_rkt_start_adapter - activate adapter
* @dev: Adapter
*
* Start up processing on an i960 based AAC adapter
*/
static void aac_rkt_start_adapter(struct aac_dev *dev)
{
struct aac_init *init;
init = dev->init;
init->HostElapsedSeconds = cpu_to_le32(get_seconds());
// We can only use a 32 bit address here
rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}
/**
* aac_rkt_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_rkt_check_health(struct aac_dev *dev)
{
u32 status = rkt_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 {
__le32 Post_Command;
__le32 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);
rkt_writel(dev, MUnit.IMRx[0], paddr);
rkt_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
post, paddr);
if ((buffer[0] == '0') && ((buffer[1] == 'x') || (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_rkt_send
* @fib: fib to issue
*
* Will send a fib, returning 0 if successful.
*/
static int aac_rkt_send(struct fib * fib)
{
u64 addr = fib->hw_fib_pa;
struct aac_dev *dev = fib->dev;
volatile void __iomem *device = dev->regs.rkt;
u32 Index;
dprintk((KERN_DEBUG "%p->aac_rkt_send(%p->%llx)\n", dev, fib, addr));
Index = rkt_readl(dev, MUnit.InboundQueue);
if (Index == 0xFFFFFFFFL)
Index = rkt_readl(dev, MUnit.InboundQueue);
dprintk((KERN_DEBUG "Index = 0x%x\n", Index));
if (Index == 0xFFFFFFFFL)
return Index;
device += Index;
dprintk((KERN_DEBUG "entry = %x %x %u\n", (u32)(addr & 0xffffffff),
(u32)(addr >> 32), (u32)le16_to_cpu(fib->hw_fib->header.Size)));
writel((u32)(addr & 0xffffffff), device);
device += sizeof(u32);
writel((u32)(addr >> 32), device);
device += sizeof(u32);
writel(le16_to_cpu(fib->hw_fib->header.Size), device);
rkt_writel(dev, MUnit.InboundQueue, Index);
dprintk((KERN_DEBUG "aac_rkt_send - return 0\n"));
return 0;
}
/**
* aac_rkt_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_rkt_init(struct aac_dev *dev)
{
unsigned long start;
unsigned long status;
int instance;
const char * name;
instance = dev->id;
name = dev->name;
/*
* Check to see if the board panic'd while booting.
*/
/*
* Check to see if the board failed any self tests.
*/
if (rkt_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 monitor panic'd while booting.
*/
if (rkt_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
goto error_iounmap;
}
/*
* Check to see if the board panic'd while booting.
*/
if (rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
goto error_iounmap;
}
start = jiffies;
/*
* Wait for the adapter to be up and running. Wait up to 3 minutes
*/
while (!(rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING))
{
if(time_after(jiffies, start+180*HZ))
{
status = rkt_readl(dev, MUnit.OMRx[0]);
printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
dev->name, instance, status);
goto error_iounmap;
}
schedule_timeout_uninterruptible(1);
}
if (request_irq(dev->scsi_host_ptr->irq, aac_rkt_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_rkt_interrupt_adapter;
dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt;
dev->a_ops.adapter_notify = aac_rkt_notify_adapter;
dev->a_ops.adapter_sync_cmd = rkt_sync_cmd;
dev->a_ops.adapter_check_health = aac_rkt_check_health;
dev->a_ops.adapter_send = aac_rkt_send;
/*
* First clear out all interrupts. Then enable the one's that we
* can handle.
*/
rkt_writeb(dev, MUnit.OIMR, 0xff);
rkt_writel(dev, MUnit.ODR, 0xffffffff);
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
if (aac_init_adapter(dev) == NULL)
goto error_irq;
if (dev->new_comm_interface) {
/*
* FIB Setup has already been done, but we can minimize the
* damage by at least ensuring the OS never issues more
* commands than we can handle. The Rocket adapters currently
* can only handle 246 commands and 8 AIFs at the same time,
* and in fact do notify us accordingly if we negotiate the
* FIB size. The problem that causes us to add this check is
* to ensure that we do not overdo it with the adapter when a
* hard coded FIB override is being utilized. This special
* case warrants this half baked, but convenient, check here.
*/
if (dev->scsi_host_ptr->can_queue > (246 - AAC_NUM_MGT_FIB)) {
dev->init->MaxIoCommands = cpu_to_le32(246);
dev->scsi_host_ptr->can_queue = 246 - AAC_NUM_MGT_FIB;
}
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
}
/*
* Tell the adapter that all is configured, and it can start
* accepting requests
*/
aac_rkt_start_adapter(dev);
return 0;
error_irq:
rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
free_irq(dev->scsi_host_ptr->irq, (void *)dev);
error_iounmap:
return -1;
}
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