/*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/types.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_rx_intr_producer(int irq, void *dev_id)
{
struct aac_dev *dev = dev_id;
unsigned long bellbits;
u8 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.
* Check to see if this is our interrupt. If it isn't just return
*/
if (intstat & ~(dev->OIMR)) {
bellbits = rx_readl(dev, OutboundDoorbellReg);
if (bellbits & DoorBellPrintfReady) {
aac_printf(dev, readl (&dev->IndexRegs->Mailbox[5]));
rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
}
else if (bellbits & DoorBellAdapterNormCmdReady) {
rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
}
else if (bellbits & DoorBellAdapterNormRespReady) {
rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
}
else if (bellbits & DoorBellAdapterNormCmdNotFull) {
rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
}
else if (bellbits & DoorBellAdapterNormRespNotFull) {
rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
}
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static irqreturn_t aac_rx_intr_message(int irq, void *dev_id)
{
struct aac_dev *dev = dev_id;
u32 Index = rx_readl(dev, MUnit.OutboundQueue);
if (Index == 0xFFFFFFFFL)
Index = rx_readl(dev, MUnit.OutboundQueue);
if (Index != 0xFFFFFFFFL) {
do {
if (aac_intr_normal(dev, Index)) {
rx_writel(dev, MUnit.OutboundQueue, Index);
rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
}
Index = rx_readl(dev, MUnit.OutboundQueue);
} while (Index != 0xFFFFFFFFL);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
/**
* aac_rx_disable_interrupt - Disable interrupts
* @dev: Adapter
*/
static void aac_rx_disable_interrupt(struct aac_dev *dev)
{
rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
}
/**
* aac_rx_enable_interrupt_producer - Enable interrupts
* @dev: Adapter
*/
static void aac_rx_enable_interrupt_producer(struct aac_dev *dev)
{
rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
}
/**
* aac_rx_enable_interrupt_message - Enable interrupts
* @dev: Adapter
*/
static void aac_rx_enable_interrupt_message(struct aac_dev *dev)
{
rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
}
/**
* 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 command to the adapter and wait
* for its completion.
*/
static int rx_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
*/
writel(command, &dev->IndexRegs->Mailbox[0]);
/*
* Write the parameters into Mailboxes 1 - 6
*/
writel(p1, &dev->IndexRegs->Mailbox[1]);
writel(p2, &dev->IndexRegs->Mailbox[2]);
writel(p3, &dev->IndexRegs->Mailbox[3]);
writel(p4, &dev->IndexRegs->Mailbox[4]);
/*
* 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, dev->OIMR = 0xff);
/*
* 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
*/
msleep(1);
}
if (ok != 1) {
/*
* Restore interrupt mask even though we timed out
*/
aac_adapter_enable_int(dev);
return -ETIMEDOUT;
}
/*
* Pull the synch status from Mailbox 0.
*/
if (status)
*status = readl(&dev->IndexRegs->Mailbox[0]);
if (r1)
*r1 = readl(&dev->IndexRegs->Mailbox[1]);
if (r2)
*r2 = readl(&dev->IndexRegs->Mailbox[2]);
if (r3)
*r3 = readl(&dev->IndexRegs->Mailbox[3]);
if (r4)
*r4 = readl(&dev->IndexRegs->Mailbox[4]);
/*
* Clear the synch command doorbell.
*/
rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
/*
* Restore interrupt mask
*/
aac_adapter_enable_int(dev);
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)
{
rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}
/**
* 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:
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
*/
void aac_rx_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
rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}
/**
* aac_rx_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_rx_check_health(struct aac_dev *dev)
{
u32 status = rx_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);
rx_writel(dev, MUnit.IMRx[0], paddr);
rx_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_rx_deliver_producer
* @fib: fib to issue
*
* Will send a fib, returning 0 if successful.
*/
static int aac_rx_deliver_producer(struct fib * fib)
{
struct aac_dev *dev = fib->dev;
struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
unsigned long qflags;
u32 Index;
unsigned long nointr = 0;
spin_lock_irqsave(q->lock, qflags);
aac_queue_get( dev, &Index, AdapNormCmdQueue, fib->hw_fib, 1, fib, &nointr);
q->numpending++;
*(q->headers.producer) = cpu_to_le32(Index + 1);
spin_unlock_irqrestore(q->lock, qflags);
if (!(nointr & aac_config.irq_mod))
aac_adapter_notify(dev, AdapNormCmdQueue);
return 0;
}
/**
* aac_rx_deliver_message
* @fib: fib to issue
*
* Will send a fib, returning 0 if successful.
*/
static int aac_rx_deliver_message(struct fib * fib)
{
struct aac_dev *dev = fib->dev;
struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
unsigned long qflags;
u32 Index;
u64 addr;
volatile void __iomem *device;
unsigned long count = 10000000L; /* 50 seconds */
spin_lock_irqsave(q->lock, qflags);
q->numpending++;
spin_unlock_irqrestore(q->lock, qflags);
for(;;) {
Index = rx_readl(dev, MUnit.InboundQueue);
if (Index == 0xFFFFFFFFL)
Index = rx_readl(dev, MUnit.InboundQueue);
if (Index != 0xFFFFFFFFL)
break;
if (--count == 0) {
spin_lock_irqsave(q->lock, qflags);
q->numpending--;
spin_unlock_irqrestore(q->lock, qflags);
return -ETIMEDOUT;
}
udelay(5);
}
device = dev->base + Index;
addr = fib->hw_fib_pa;
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);
rx_writel(dev, MUnit.InboundQueue, Index);
return 0;
}
/**
* aac_rx_ioremap
* @size: mapping resize request
*
*/
static int aac_rx_ioremap(struct aac_dev * dev, u32 size)
{
if (!size) {
iounmap(dev->regs.rx);
return 0;
}
dev->base = dev->regs.rx = ioremap(dev->scsi_host_ptr->base, size);
if (dev->base == NULL)
return -1;
dev->IndexRegs = &dev->regs.rx->IndexRegs;
return 0;
}
static int aac_rx_restart_adapter(struct aac_dev *dev)
{
u32 var;
printk(KERN_ERR "%s%d: adapter kernel panic'd.\n",
dev->name, dev->id);
if (aac_rx_check_health(dev) <= 0)
return 1;
if (rx_sync_cmd(dev, IOP_RESET, 0, 0, 0, 0, 0, 0,
&var, NULL, NULL, NULL, NULL))
return 1;
if (var != 0x00000001)
return 1;
if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC)
return 1;
return 0;
}
/**
* aac_rx_select_comm - Select communications method
* @dev: Adapter
* @comm: communications method
*/
int aac_rx_select_comm(struct aac_dev *dev, int comm)
{
switch (comm) {
case AAC_COMM_PRODUCER:
dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_producer;
dev->a_ops.adapter_intr = aac_rx_intr_producer;
dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
break;
case AAC_COMM_MESSAGE:
dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_message;
dev->a_ops.adapter_intr = aac_rx_intr_message;
dev->a_ops.adapter_deliver = aac_rx_deliver_message;
break;
default:
return 1;
}
return 0;
}
/**
* aac_rx_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_rx_init(struct aac_dev *dev)
{
unsigned long start;
unsigned long status;
int instance;
const char * name;
instance = dev->id;
name = dev->name;
if (aac_adapter_ioremap(dev, dev->base_size)) {
printk(KERN_WARNING "%s: unable to map adapter.\n", name);
goto error_iounmap;
}
/*
* Check to see if the board panic'd while booting.
*/
status = rx_readl(dev, MUnit.OMRx[0]);
if (status & KERNEL_PANIC)
if (aac_rx_restart_adapter(dev))
goto error_iounmap;
/*
* Check to see if the board failed any self tests.
*/
status = rx_readl(dev, MUnit.OMRx[0]);
if (status & 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 (status & MONITOR_PANIC) {
printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
goto error_iounmap;
}
start = jiffies;
/*
* Wait for the adapter to be up and running. Wait up to 3 minutes
*/
while (!((status = rx_readl(dev, MUnit.OMRx[0])) & KERNEL_UP_AND_RUNNING))
{
if(time_after(jiffies, start+startup_timeout*HZ))
{
printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
dev->name, instance, status);
goto error_iounmap;
}
msleep(1);
}
/*
* Fill in the common function dispatch table.
*/
dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
dev->a_ops.adapter_notify = aac_rx_notify_adapter;
dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
dev->a_ops.adapter_check_health = aac_rx_check_health;
/*
* First clear out all interrupts. Then enable the one's that we
* can handle.
*/
aac_adapter_comm(dev, AAC_COMM_PRODUCER);
aac_adapter_disable_int(dev);
rx_writel(dev, MUnit.ODR, 0xffffffff);
aac_adapter_enable_int(dev);
if (aac_init_adapter(dev) == NULL)
goto error_iounmap;
aac_adapter_comm(dev, dev->comm_interface);
if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) {
printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
name, instance);
goto error_iounmap;
}
aac_adapter_enable_int(dev);
/*
* Tell the adapter that all is configured, and it can
* start accepting requests
*/
aac_rx_start_adapter(dev);
return 0;
error_iounmap:
return -1;
}
int aac_rx_init(struct aac_dev *dev)
{
/*
* Fill in the function dispatch table.
*/
dev->a_ops.adapter_ioremap = aac_rx_ioremap;
dev->a_ops.adapter_comm = aac_rx_select_comm;
return _aac_rx_init(dev);
}
