sa.c
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上传日期:2013-04-10
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- /*
- * 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/config.h>
- #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/blk.h>
- #include <linux/delay.h>
- #include <linux/completion.h>
- #include <asm/semaphore.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "aacraid.h"
- static void 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, le32_to_cpu(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);
- }
- }
- }
- /**
- * aac_sa_enable_interrupt - enable an interrupt event
- * @dev: Which adapter to enable.
- * @event: Which adapter event.
- *
- * This routine will enable the corresponding adapter event to cause an interrupt on
- * the host.
- */
-
- void aac_sa_enable_interrupt(struct aac_dev *dev, u32 event)
- {
- switch (event) {
- case HostNormCmdQue:
- sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_1);
- break;
- case HostNormRespQue:
- sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_2);
- break;
- case AdapNormCmdNotFull:
- sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_3);
- break;
- case AdapNormRespNotFull:
- sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_4);
- break;
- }
- }
- /**
- * aac_sa_disable_interrupt - disable an interrupt event
- * @dev: Which adapter to enable.
- * @event: Which adapter event.
- *
- * This routine will enable the corresponding adapter event to cause an interrupt on
- * the host.
- */
- void aac_sa_disable_interrupt (struct aac_dev *dev, u32 event)
- {
- switch (event) {
- case HostNormCmdQue:
- sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_1);
- break;
- case HostNormRespQue:
- sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_2);
- break;
- case AdapNormCmdNotFull:
- sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_3);
- break;
- case AdapNormRespNotFull:
- sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_4);
- break;
- }
- }
- /**
- * 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 comamnd 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, cpu_to_le32(command));
- /*
- * Write the parameters into Mailboxes 1 - 4
- */
- sa_writel(dev, Mailbox1, cpu_to_le32(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.
- */
- *ret = le32_to_cpu(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(jiffies/HZ);
- dprintk(("INITn"));
- /*
- * 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.
- */
- dprintk(("MASKn"));
- sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff));
- sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
- dprintk(("SYNCCMDn"));
- /* 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_init - initialize an ARM based AAC card
- * @dev: device to configure
- * @devnum: adapter number
- *
- * 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 devnum)
- {
- unsigned long start;
- unsigned long status;
- int instance;
- const char *name;
- dev->devnum = devnum;
- dprintk(("PREINSTn"));
- instance = dev->id;
- name = dev->name;
- /*
- * Map in the registers from the adapter.
- */
- dprintk(("PREMAPn"));
- if((dev->regs.sa = (struct sa_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
- {
- printk(KERN_WARNING "aacraid: unable to map ARM.n" );
- return -1;
- }
- /*
- * 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);
- return -1;
- }
- /*
- * 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);
- return -1;
- }
- 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(start+180*HZ, jiffies)) {
- status = sa_readl(dev, Mailbox7) >> 16;
- printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %d.n", name, instance, le32_to_cpu(status));
- return -1;
- }
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- }
- dprintk(("ATIRQn"));
- 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);
- return -1;
- }
- /*
- * Fill in the function dispatch table.
- */
- dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
- dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
- dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
- dev->a_ops.adapter_notify = aac_sa_notify_adapter;
- dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
- dprintk(("FUNCDONEn"));
- if(aac_init_adapter(dev) == NULL)
- return -1;
- dprintk(("NEWADAPTDONEn"));
- /*
- * Start any kernel threads needed
- */
- dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
- /*
- * Tell the adapter that all is configure, and it can start
- * accepting requests
- */
- dprintk(("STARTINGn"));
- aac_sa_start_adapter(dev);
- dprintk(("STARTEDn"));
- return 0;
- }