372 lines
9.1 KiB
C
372 lines
9.1 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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* sa.c
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*
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* Abstract: Drawbridge specific support 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_sa_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 short intstat, mask;
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intstat = sa_readw(dev, DoorbellReg_p);
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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 been enabled.
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*/
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mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
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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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if (intstat & PrintfReady) {
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aac_printf(dev, sa_readl(dev, Mailbox5));
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sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
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sa_writew(dev, DoorbellReg_s, PrintfDone);
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} else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready
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aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
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} else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready
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aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
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} else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
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} else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
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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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* aac_sa_disable_interrupt - disable interrupt
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* @dev: Which adapter to enable.
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*/
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static void aac_sa_disable_interrupt (struct aac_dev *dev)
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{
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sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
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}
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/**
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* aac_sa_notify_adapter - handle adapter notification
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* @dev: Adapter that notification is for
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* @event: Event to notidy
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*
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* Notify the adapter of an event
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*/
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static void aac_sa_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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sa_writew(dev, DoorbellReg_s,DOORBELL_1);
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break;
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case HostNormRespNotFull:
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sa_writew(dev, DoorbellReg_s,DOORBELL_4);
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break;
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case AdapNormRespQue:
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sa_writew(dev, DoorbellReg_s,DOORBELL_2);
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break;
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case HostNormCmdNotFull:
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sa_writew(dev, DoorbellReg_s,DOORBELL_3);
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break;
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case HostShutdown:
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/*
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sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
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NULL, NULL, NULL, NULL, NULL);
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*/
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break;
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case FastIo:
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sa_writew(dev, DoorbellReg_s,DOORBELL_6);
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break;
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case AdapPrintfDone:
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sa_writew(dev, DoorbellReg_s,DOORBELL_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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* sa_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 sa_sync_cmd(struct aac_dev *dev, u32 command,
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u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
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u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
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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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sa_writel(dev, Mailbox0, command);
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/*
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* Write the parameters into Mailboxes 1 - 4
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*/
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sa_writel(dev, Mailbox1, p1);
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sa_writel(dev, Mailbox2, p2);
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sa_writel(dev, Mailbox3, p3);
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sa_writel(dev, Mailbox4, p4);
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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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sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
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/*
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* Signal that there is a new synch command
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*/
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sa_writew(dev, DoorbellReg_s, DOORBELL_0);
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ok = 0;
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start = jiffies;
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while(time_before(jiffies, start+30*HZ))
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{
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/*
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* Delay 5uS so that the monitor gets access
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*/
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udelay(5);
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/*
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* Mon110 will set doorbell0 bit when it has
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* completed the command.
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*/
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if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) {
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ok = 1;
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break;
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}
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msleep(1);
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}
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if (ok != 1)
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return -ETIMEDOUT;
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/*
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* Clear the synch command doorbell.
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*/
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
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/*
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* Pull the synch status from Mailbox 0.
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*/
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if (ret)
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*ret = sa_readl(dev, Mailbox0);
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if (r1)
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*r1 = sa_readl(dev, Mailbox1);
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if (r2)
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*r2 = sa_readl(dev, Mailbox2);
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if (r3)
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*r3 = sa_readl(dev, Mailbox3);
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if (r4)
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*r4 = sa_readl(dev, Mailbox4);
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return 0;
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}
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/**
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* aac_sa_interrupt_adapter - interrupt an adapter
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* @dev: Which adapter to enable.
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*
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* Breakpoint an adapter.
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*/
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static void aac_sa_interrupt_adapter (struct aac_dev *dev)
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{
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sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
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NULL, NULL, NULL, NULL, NULL);
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}
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/**
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* aac_sa_start_adapter - activate adapter
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* @dev: Adapter
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*
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* Start up processing on an ARM based AAC adapter
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*/
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static void aac_sa_start_adapter(struct aac_dev *dev)
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{
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struct aac_init *init;
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/*
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* Fill in the remaining pieces of the init.
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*/
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init = dev->init;
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init->HostElapsedSeconds = cpu_to_le32(get_seconds());
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/* We can only use a 32 bit address here */
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sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
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(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
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NULL, NULL, NULL, NULL, NULL);
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}
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/**
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* aac_sa_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_sa_check_health(struct aac_dev *dev)
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{
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long status = sa_readl(dev, Mailbox7);
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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 while booting.
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*/
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if (status & KERNEL_PANIC)
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return -2;
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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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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_sa_init - initialize an ARM 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 ARM 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_sa_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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* Check to see if the board failed any self tests.
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*/
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if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
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printk(KERN_WARNING "%s%d: adapter self-test failed.\n", 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 (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
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printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", 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 (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
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if (time_after(jiffies, start+180*HZ)) {
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status = sa_readl(dev, Mailbox7);
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printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
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name, instance, status);
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goto error_iounmap;
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}
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schedule_timeout_uninterruptible(1);
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}
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if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
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printk(KERN_WARNING "%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_sa_interrupt_adapter;
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dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
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dev->a_ops.adapter_notify = aac_sa_notify_adapter;
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dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
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dev->a_ops.adapter_check_health = aac_sa_check_health;
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/*
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* First clear out all interrupts. Then enable the one's that
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* we can handle.
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*/
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sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
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sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
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DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
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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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* Tell the adapter that all is configure, and it can start
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* accepting requests
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*/
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aac_sa_start_adapter(dev);
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return 0;
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error_irq:
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sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
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free_irq(dev->scsi_host_ptr->irq, (void *)dev);
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error_iounmap:
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return -1;
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}
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