442 lines
11 KiB
C
442 lines
11 KiB
C
/*
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* Adaptec AAC series RAID controller driver
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* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
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*
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* based on the old aacraid driver that is..
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* Adaptec aacraid device driver for Linux.
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*
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* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Module Name:
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* rx.c
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*
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* Abstract: Hardware miniport for Drawbridge specific hardware functions.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/time.h>
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#include <linux/interrupt.h>
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#include <asm/semaphore.h>
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#include <scsi/scsi_host.h>
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#include "aacraid.h"
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static irqreturn_t aac_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct aac_dev *dev = dev_id;
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unsigned long bellbits;
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u8 intstat, mask;
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intstat = rx_readb(dev, MUnit.OISR);
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/*
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* Read mask and invert because drawbridge is reversed.
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* This allows us to only service interrupts that have
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* been enabled.
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*/
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mask = ~(dev->OIMR);
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/* Check to see if this is our interrupt. If it isn't just return */
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if (intstat & mask)
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{
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bellbits = rx_readl(dev, OutboundDoorbellReg);
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if (bellbits & DoorBellPrintfReady) {
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aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
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rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
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rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
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}
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else if (bellbits & DoorBellAdapterNormCmdReady) {
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rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
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aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
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}
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else if (bellbits & DoorBellAdapterNormRespReady) {
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aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
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rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
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}
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else if (bellbits & DoorBellAdapterNormCmdNotFull) {
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rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
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}
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else if (bellbits & DoorBellAdapterNormRespNotFull) {
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rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
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rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
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}
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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/**
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* rx_sync_cmd - send a command and wait
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* @dev: Adapter
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* @command: Command to execute
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* @p1: first parameter
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* @ret: adapter status
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*
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* This routine will send a synchronous command to the adapter and wait
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* for its completion.
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*/
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static int rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
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{
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unsigned long start;
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int ok;
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/*
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* Write the command into Mailbox 0
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*/
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rx_writel(dev, InboundMailbox0, command);
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/*
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* Write the parameters into Mailboxes 1 - 4
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*/
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rx_writel(dev, InboundMailbox1, p1);
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rx_writel(dev, InboundMailbox2, 0);
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rx_writel(dev, InboundMailbox3, 0);
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rx_writel(dev, InboundMailbox4, 0);
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/*
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* Clear the synch command doorbell to start on a clean slate.
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*/
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rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
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/*
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* Disable doorbell interrupts
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*/
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rx_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04);
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/*
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* Force the completion of the mask register write before issuing
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* the interrupt.
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*/
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rx_readb (dev, MUnit.OIMR);
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/*
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* Signal that there is a new synch command
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*/
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rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
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ok = 0;
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start = jiffies;
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/*
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* Wait up to 30 seconds
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*/
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while (time_before(jiffies, start+30*HZ))
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{
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udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
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/*
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* Mon960 will set doorbell0 bit when it has completed the command.
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*/
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if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
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/*
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* Clear the doorbell.
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*/
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rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
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ok = 1;
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break;
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}
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/*
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* Yield the processor in case we are slow
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*/
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(1);
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}
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if (ok != 1) {
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/*
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* Restore interrupt mask even though we timed out
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*/
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rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
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return -ETIMEDOUT;
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}
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/*
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* Pull the synch status from Mailbox 0.
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*/
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if (status)
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*status = rx_readl(dev, IndexRegs.Mailbox[0]);
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/*
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* Clear the synch command doorbell.
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*/
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rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
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/*
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* Restore interrupt mask
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*/
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rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
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return 0;
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}
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/**
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* aac_rx_interrupt_adapter - interrupt adapter
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* @dev: Adapter
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*
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* Send an interrupt to the i960 and breakpoint it.
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*/
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static void aac_rx_interrupt_adapter(struct aac_dev *dev)
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{
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u32 ret;
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rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
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}
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/**
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* aac_rx_notify_adapter - send an event to the adapter
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* @dev: Adapter
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* @event: Event to send
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*
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* Notify the i960 that something it probably cares about has
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* happened.
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*/
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static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
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{
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switch (event) {
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case AdapNormCmdQue:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
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break;
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case HostNormRespNotFull:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
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break;
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case AdapNormRespQue:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
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break;
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case HostNormCmdNotFull:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
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break;
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case HostShutdown:
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// rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
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break;
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case FastIo:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
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break;
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case AdapPrintfDone:
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rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
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break;
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default:
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BUG();
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break;
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}
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}
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/**
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* aac_rx_start_adapter - activate adapter
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* @dev: Adapter
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*
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* Start up processing on an i960 based AAC adapter
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*/
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static void aac_rx_start_adapter(struct aac_dev *dev)
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{
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u32 status;
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struct aac_init *init;
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init = dev->init;
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init->HostElapsedSeconds = cpu_to_le32(get_seconds());
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/*
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* Tell the adapter we are back and up and running so it will scan
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* its command queues and enable our interrupts
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*/
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dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
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/*
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* First clear out all interrupts. Then enable the one's that we
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* can handle.
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*/
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rx_writeb(dev, MUnit.OIMR, 0xff);
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rx_writel(dev, MUnit.ODR, 0xffffffff);
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// rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
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rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
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// We can only use a 32 bit address here
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rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
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}
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/**
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* aac_rx_check_health
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* @dev: device to check if healthy
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*
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* Will attempt to determine if the specified adapter is alive and
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* capable of handling requests, returning 0 if alive.
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*/
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static int aac_rx_check_health(struct aac_dev *dev)
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{
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u32 status = rx_readl(dev, MUnit.OMRx[0]);
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/*
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* Check to see if the board failed any self tests.
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*/
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if (status & SELF_TEST_FAILED)
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return -1;
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/*
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* Check to see if the board panic'd.
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*/
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if (status & KERNEL_PANIC) {
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char * buffer;
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struct POSTSTATUS {
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u32 Post_Command;
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u32 Post_Address;
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} * post;
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dma_addr_t paddr, baddr;
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int ret;
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if ((status & 0xFF000000L) == 0xBC000000L)
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return (status >> 16) & 0xFF;
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buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
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ret = -2;
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if (buffer == NULL)
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return ret;
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post = pci_alloc_consistent(dev->pdev,
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sizeof(struct POSTSTATUS), &paddr);
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if (post == NULL) {
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pci_free_consistent(dev->pdev, 512, buffer, baddr);
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return ret;
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}
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memset(buffer, 0, 512);
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post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
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post->Post_Address = cpu_to_le32(baddr);
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rx_writel(dev, MUnit.IMRx[0], paddr);
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rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, &status);
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pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
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post, paddr);
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if ((buffer[0] == '0') && (buffer[1] == 'x')) {
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ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
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ret <<= 4;
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ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
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}
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pci_free_consistent(dev->pdev, 512, buffer, baddr);
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return ret;
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}
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/*
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* Wait for the adapter to be up and running.
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*/
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if (!(status & KERNEL_UP_AND_RUNNING))
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return -3;
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/*
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* Everything is OK
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*/
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return 0;
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}
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/**
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* aac_rx_init - initialize an i960 based AAC card
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* @dev: device to configure
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*
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* Allocate and set up resources for the i960 based AAC variants. The
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* device_interface in the commregion will be allocated and linked
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* to the comm region.
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*/
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int aac_rx_init(struct aac_dev *dev)
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{
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unsigned long start;
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unsigned long status;
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int instance;
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const char * name;
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instance = dev->id;
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name = dev->name;
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/*
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* Map in the registers from the adapter.
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*/
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if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
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{
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printk(KERN_WARNING "aacraid: unable to map i960.\n" );
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return -1;
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}
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/*
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* Check to see if the board failed any self tests.
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*/
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if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
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printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
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goto error_iounmap;
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}
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/*
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* Check to see if the board panic'd while booting.
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*/
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if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
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printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
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goto error_iounmap;
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}
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/*
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* Check to see if the monitor panic'd while booting.
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*/
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if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
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printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
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goto error_iounmap;
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}
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start = jiffies;
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/*
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* Wait for the adapter to be up and running. Wait up to 3 minutes
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*/
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while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
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|| (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
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{
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if(time_after(jiffies, start+180*HZ))
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{
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status = rx_readl(dev, IndexRegs.Mailbox[7]);
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printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
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dev->name, instance, status);
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goto error_iounmap;
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(1);
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}
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if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
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{
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printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
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goto error_iounmap;
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}
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/*
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* Fill in the function dispatch table.
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*/
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dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
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dev->a_ops.adapter_notify = aac_rx_notify_adapter;
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dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
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dev->a_ops.adapter_check_health = aac_rx_check_health;
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if (aac_init_adapter(dev) == NULL)
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goto error_irq;
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/*
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* Start any kernel threads needed
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*/
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dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
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if(dev->thread_pid < 0)
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{
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printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
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goto error_kfree;
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}
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/*
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* Tell the adapter that all is configured, and it can start
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* accepting requests
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*/
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aac_rx_start_adapter(dev);
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return 0;
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error_kfree:
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kfree(dev->queues);
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error_irq:
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free_irq(dev->scsi_host_ptr->irq, (void *)dev);
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error_iounmap:
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iounmap(dev->regs.rx);
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return -1;
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}
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