Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 374 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/sa.c b/drivers/scsi/aacraid/sa.c
new file mode 100644
index 000000000000..bd6c30723fba
--- /dev/null
+++ b/drivers/scsi/aacraid/sa.c
@@ -0,0 +1,374 @@
+/*
+ *      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:
+ *  sa.c
+ *
+ * Abstract: Drawbridge specific support functions
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+#include <asm/semaphore.h>
+
+#include <scsi/scsi_host.h>
+
+#include "aacraid.h"
+
+static irqreturn_t aac_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct aac_dev *dev = dev_id;
+        unsigned short intstat, mask;
+
+        intstat = sa_readw(dev, DoorbellReg_p);
+        /*
+         *      Read mask and invert because drawbridge is reversed.
+         *      This allows us to only service interrupts that have been enabled.
+         */
+        mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
+
+        /* Check to see if this is our interrupt.  If it isn't just return */
+
+        if (intstat & mask) {
+                if (intstat & PrintfReady) {
+                        aac_printf(dev, sa_readl(dev, Mailbox5));
+                        sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
+                        sa_writew(dev, DoorbellReg_s, PrintfDone);
+                } else if (intstat & DOORBELL_1) {      // dev -> Host Normal Command Ready
+                        aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
+                        sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
+                } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
+                        aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
+                        sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
+                } else if (intstat & DOORBELL_3) {      // dev -> Host Normal Command Not Full
+                        sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
+                } else if (intstat & DOORBELL_4) {      // dev -> Host Normal Response Not Full
+                        sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
+                }
+                return IRQ_HANDLED;
+        }
+        return IRQ_NONE;
+}
+
+/**
+ *      aac_sa_notify_adapter           -       handle adapter notification
+ *      @dev:   Adapter that notification is for
+ *      @event: Event to notidy
+ *
+ *      Notify the adapter of an event
+ */
+ 
+void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
+{
+        switch (event) {
+
+        case AdapNormCmdQue:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_1);
+                break;
+        case HostNormRespNotFull:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_4);
+                break;
+        case AdapNormRespQue:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_2);
+                break;
+        case HostNormCmdNotFull:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_3);
+                break;
+        case HostShutdown:
+                //sa_sync_cmd(dev, HOST_CRASHING, 0, &ret);
+                break;
+        case FastIo:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_6);
+                break;
+        case AdapPrintfDone:
+                sa_writew(dev, DoorbellReg_s,DOORBELL_5);
+                break;
+        default:
+                BUG();
+                break;
+        }
+}
+
+
+/**
+ *      sa_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 sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
+{
+        unsigned long start;
+        int ok;
+        /*
+         *      Write the Command into Mailbox 0
+         */
+        sa_writel(dev, Mailbox0, command);
+        /*
+         *      Write the parameters into Mailboxes 1 - 4
+         */
+        sa_writel(dev, Mailbox1, p1);
+        sa_writel(dev, Mailbox2, 0);
+        sa_writel(dev, Mailbox3, 0);
+        sa_writel(dev, Mailbox4, 0);
+        /*
+         *      Clear the synch command doorbell to start on a clean slate.
+         */
+        sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+        /*
+         *      Signal that there is a new synch command
+         */
+        sa_writew(dev, DoorbellReg_s, DOORBELL_0);
+
+        ok = 0;
+        start = jiffies;
+
+        while(time_before(jiffies, start+30*HZ))
+        {
+                /*
+                 *      Delay 5uS so that the monitor gets access
+                 */
+                udelay(5);
+                /*
+                 *      Mon110 will set doorbell0 bit when it has 
+                 *      completed the command.
+                 */
+                if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
+                        ok = 1;
+                        break;
+                }
+                set_current_state(TASK_UNINTERRUPTIBLE);
+                schedule_timeout(1);
+        }
+
+        if (ok != 1)
+                return -ETIMEDOUT;
+        /*
+         *      Clear the synch command doorbell.
+         */
+        sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+        /*
+         *      Pull the synch status from Mailbox 0.
+         */
+        if (ret)
+                *ret = sa_readl(dev, Mailbox0);
+        return 0;
+}
+
+/**
+ *      aac_sa_interrupt_adapter        -       interrupt an adapter
+ *      @dev: Which adapter to enable.
+ *
+ *      Breakpoint an adapter.
+ */
+ 
+static void aac_sa_interrupt_adapter (struct aac_dev *dev)
+{
+        u32 ret;
+        sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
+}
+
+/**
+ *      aac_sa_start_adapter            -       activate adapter
+ *      @dev:   Adapter
+ *
+ *      Start up processing on an ARM based AAC adapter
+ */
+
+static void aac_sa_start_adapter(struct aac_dev *dev)
+{
+        u32 ret;
+        struct aac_init *init;
+        /*
+         * Fill in the remaining pieces of the init.
+         */
+        init = dev->init;
+        init->HostElapsedSeconds = cpu_to_le32(get_seconds());
+
+        /*
+         * Tell the adapter we are back and up and running so it will scan its command
+         * queues and enable our interrupts
+         */
+        dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
+        /*
+         *      First clear out all interrupts.  Then enable the one's that 
+         *      we can handle.
+         */
+        sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff));
+        sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
+        /* We can only use a 32 bit address here */
+        sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret);
+}
+
+/**
+ *      aac_sa_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_sa_check_health(struct aac_dev *dev)
+{
+        long status = sa_readl(dev, Mailbox7);
+
+        /*
+         *      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 while booting.
+         */
+        if (status & KERNEL_PANIC)
+                return -2;
+        /*
+         *      Wait for the adapter to be up and running. Wait up to 3 minutes
+         */
+        if (!(status & KERNEL_UP_AND_RUNNING))
+                return -3;
+        /*
+         *      Everything is OK
+         */
+        return 0;
+}
+
+/**
+ *      aac_sa_init     -       initialize an ARM based AAC card
+ *      @dev: device to configure
+ *
+ *      Allocate and set up resources for the ARM based AAC variants. The 
+ *      device_interface in the commregion will be allocated and linked 
+ *      to the comm region.
+ */
+
+int aac_sa_init(struct aac_dev *dev)
+{
+        unsigned long start;
+        unsigned long status;
+        int instance;
+        const char *name;
+
+        instance = dev->id;
+        name     = dev->name;
+
+        /*
+         *      Map in the registers from the adapter.
+         */
+
+        if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
+        {       
+                printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
+                goto error_iounmap;
+        }
+        /*
+         *      Check to see if the board failed any self tests.
+         */
+        if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
+                printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
+                goto error_iounmap;
+        }
+        /*
+         *      Check to see if the board panic'd while booting.
+         */
+        if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
+                printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
+                goto error_iounmap;
+        }
+        start = jiffies;
+        /*
+         *      Wait for the adapter to be up and running. Wait up to 3 minutes.
+         */
+        while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
+                if (time_after(jiffies, start+180*HZ)) {
+                        status = sa_readl(dev, Mailbox7);
+                        printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", 
+                                        name, instance, status);
+                        goto error_iounmap;
+                }
+                set_current_state(TASK_UNINTERRUPTIBLE);
+                schedule_timeout(1);
+        }
+
+        if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
+                printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
+                goto error_iounmap;
+        }
+
+        /*
+         *      Fill in the function dispatch table.
+         */
+
+        dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
+        dev->a_ops.adapter_notify = aac_sa_notify_adapter;
+        dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
+        dev->a_ops.adapter_check_health = aac_sa_check_health;
+
+
+        if(aac_init_adapter(dev) == NULL)
+                goto error_irq;
+
+        /*
+         *      Start any kernel threads needed
+         */
+        dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
+        if (dev->thread_pid < 0) {
+                printk(KERN_ERR "aacraid: Unable to create command thread.\n");
+                goto error_kfree;
+        }
+
+        /*
+         *      Tell the adapter that all is configure, and it can start 
+         *      accepting requests
+         */
+        aac_sa_start_adapter(dev);
+        return 0;
+
+
+error_kfree:
+        kfree(dev->queues);
+
+error_irq:
+        free_irq(dev->scsi_host_ptr->irq, (void *)dev);
+
+error_iounmap:
+        iounmap(dev->regs.sa);
+
+        return -1;
+}
+