diff options
Diffstat (limited to 'drivers/scsi/aacraid/sa.c')
| -rw-r--r-- | drivers/scsi/aacraid/sa.c | 374 |
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 0000000..bd6c307 --- /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; +} + |