28713324a0
Received from Mark Salyzyn, Replace all if/else communication transports with a platform function call. This is in recognition of the need to migrate to up-and-coming transports. Currently the Linux driver does not support two available communication transports provided by our products, these will be added in future patches, and will expand the platform function set. Signed-off-by Mark Haverkamp <markh@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
408 lines
9.8 KiB
C
408 lines
9.8 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)
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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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sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
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aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
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} else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready
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sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
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aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
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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_enable_interrupt - enable interrupt
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* @dev: Which adapter to enable.
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*/
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static void aac_sa_enable_interrupt (struct aac_dev *dev)
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{
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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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}
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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_ioremap
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* @size: mapping resize request
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*
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*/
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static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
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{
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if (!size) {
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iounmap(dev->regs.sa);
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return 0;
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}
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dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
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return (dev->base == NULL) ? -1 : 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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if (aac_sa_ioremap(dev, dev->base_size)) {
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printk(KERN_WARNING "%s: unable to map adapter.\n", name);
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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 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+startup_timeout*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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msleep(1);
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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_enable_int = aac_sa_enable_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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dev->a_ops.adapter_intr = aac_sa_intr;
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dev->a_ops.adapter_ioremap = aac_sa_ioremap;
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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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aac_adapter_disable_int(dev);
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aac_adapter_enable_int(dev);
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if(aac_init_adapter(dev) == NULL)
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goto error_irq;
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if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
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IRQF_SHARED|IRQF_DISABLED,
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"aacraid", (void *)dev ) < 0) {
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printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
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name, instance);
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goto error_iounmap;
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}
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aac_adapter_enable_int(dev);
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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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aac_sa_disable_interrupt(dev);
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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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