rx.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:
- * rx.c
- *
- * Abstract: Hardware miniport for Drawbridge specific hardware 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_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct aac_dev *dev = dev_id;
- unsigned long bellbits;
- u8 intstat, mask;
- intstat = rx_readb(dev, MUnit.OISR);
- /*
- * Read mask and invert because drawbridge is reversed.
- * This allows us to only service interrupts that have
- * been enabled.
- */
- mask = ~(rx_readb(dev, MUnit.OIMR));
- /* Check to see if this is our interrupt. If it isn't just return */
- if (intstat & mask)
- {
- bellbits = rx_readl(dev, OutboundDoorbellReg);
- if (bellbits & DoorBellPrintfReady) {
- aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
- rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
- rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
- }
- else if (bellbits & DoorBellAdapterNormCmdReady) {
- aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
- rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
- }
- else if (bellbits & DoorBellAdapterNormRespReady) {
- aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
- rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
- }
- else if (bellbits & DoorBellAdapterNormCmdNotFull) {
- rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
- }
- else if (bellbits & DoorBellAdapterNormRespNotFull) {
- rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
- rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
- }
- }
- }
- /**
- * aac_rx_enable_interrupt - Enable event reporting
- * @dev: Adapter
- * @event: Event to enable
- *
- * Enable event reporting from the i960 for a given event.
- */
-
- static void aac_rx_enable_interrupt(struct aac_dev * dev, u32 event)
- {
- switch (event) {
- case HostNormCmdQue:
- dev->irq_mask &= ~(OUTBOUNDDOORBELL_1);
- break;
- case HostNormRespQue:
- dev->irq_mask &= ~(OUTBOUNDDOORBELL_2);
- break;
- case AdapNormCmdNotFull:
- dev->irq_mask &= ~(OUTBOUNDDOORBELL_3);
- break;
- case AdapNormRespNotFull:
- dev->irq_mask &= ~(OUTBOUNDDOORBELL_4);
- break;
- }
- }
- /**
- * aac_rx_disable_interrupt - Disable event reporting
- * @dev: Adapter
- * @event: Event to enable
- *
- * Disable event reporting from the i960 for a given event.
- */
- static void aac_rx_disable_interrupt(struct aac_dev *dev, u32 event)
- {
- switch (event) {
- case HostNormCmdQue:
- dev->irq_mask |= (OUTBOUNDDOORBELL_1);
- break;
- case HostNormRespQue:
- dev->irq_mask |= (OUTBOUNDDOORBELL_2);
- break;
- case AdapNormCmdNotFull:
- dev->irq_mask |= (OUTBOUNDDOORBELL_3);
- break;
- case AdapNormRespNotFull:
- dev->irq_mask |= (OUTBOUNDDOORBELL_4);
- break;
- }
- }
- /**
- * rx_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 rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
- {
- unsigned long start;
- int ok;
- /*
- * Write the command into Mailbox 0
- */
- rx_writel(dev, InboundMailbox0, cpu_to_le32(command));
- /*
- * Write the parameters into Mailboxes 1 - 4
- */
- rx_writel(dev, InboundMailbox1, cpu_to_le32(p1));
- rx_writel(dev, InboundMailbox2, 0);
- rx_writel(dev, InboundMailbox3, 0);
- rx_writel(dev, InboundMailbox4, 0);
- /*
- * Clear the synch command doorbell to start on a clean slate.
- */
- rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
- /*
- * Disable doorbell interrupts
- */
- rx_writeb(dev, MUnit.OIMR, rx_readb(dev, MUnit.OIMR) | 0x04);
- /*
- * Force the completion of the mask register write before issuing
- * the interrupt.
- */
- rx_readb (dev, MUnit.OIMR);
- /*
- * Signal that there is a new synch command
- */
- rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
- ok = 0;
- start = jiffies;
- /*
- * Wait up to 30 seconds
- */
- while (time_before(jiffies, start+30*HZ))
- {
- udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
- /*
- * Mon960 will set doorbell0 bit when it has completed the command.
- */
- if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
- /*
- * Clear the doorbell.
- */
- rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
- ok = 1;
- break;
- }
- /*
- * Yield the processor in case we are slow
- */
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- }
- if (ok != 1) {
- /*
- * Restore interrupt mask even though we timed out
- */
- rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.OIMR) & 0xfb);
- return -ETIMEDOUT;
- }
- /*
- * Pull the synch status from Mailbox 0.
- */
- *status = le32_to_cpu(rx_readl(dev, IndexRegs.Mailbox[0]));
- /*
- * Clear the synch command doorbell.
- */
- rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
- /*
- * Restore interrupt mask
- */
- rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.OIMR) & 0xfb);
- return 0;
- }
- /**
- * aac_rx_interrupt_adapter - interrupt adapter
- * @dev: Adapter
- *
- * Send an interrupt to the i960 and breakpoint it.
- */
- static void aac_rx_interrupt_adapter(struct aac_dev *dev)
- {
- u32 ret;
- rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
- }
- /**
- * aac_rx_notify_adapter - send an event to the adapter
- * @dev: Adapter
- * @event: Event to send
- *
- * Notify the i960 that something it probably cares about has
- * happened.
- */
- static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
- {
- switch (event) {
- case AdapNormCmdQue:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
- break;
- case HostNormRespNotFull:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
- break;
- case AdapNormRespQue:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
- break;
- case HostNormCmdNotFull:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
- break;
- case HostShutdown:
- // rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
- break;
- case FastIo:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
- break;
- case AdapPrintfDone:
- rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
- break;
- default:
- BUG();
- break;
- }
- }
- /**
- * aac_rx_start_adapter - activate adapter
- * @dev: Adapter
- *
- * Start up processing on an i960 based AAC adapter
- */
- static void aac_rx_start_adapter(struct aac_dev *dev)
- {
- u32 status;
- struct aac_init *init;
- init = dev->init;
- init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
- /*
- * Tell the adapter we are back and up and running so it will scan
- * its command queues and enable our interrupts
- */
- dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
- /*
- * First clear out all interrupts. Then enable the one's that we
- * can handle.
- */
- rx_writeb(dev, MUnit.OIMR, 0xff);
- rx_writel(dev, MUnit.ODR, 0xffffffff);
- // rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
- rx_writeb(dev, MUnit.OIMR, 0xfb);
- // We can only use a 32 bit address here
- rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
- }
- /**
- * aac_rx_init - initialize an i960 based AAC card
- * @dev: device to configure
- * @devnum: adapter number
- *
- * Allocate and set up resources for the i960 based AAC variants. The
- * device_interface in the commregion will be allocated and linked
- * to the comm region.
- */
- int aac_rx_init(struct aac_dev *dev, unsigned long num)
- {
- unsigned long start;
- unsigned long status;
- int instance;
- const char * name;
- dev->devnum = num;
- instance = dev->id;
- name = dev->name;
- /*
- * Map in the registers from the adapter.
- */
- if((dev->regs.rx = (struct rx_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
- {
- printk(KERN_WARNING "aacraid: unable to map i960.n" );
- return -1;
- }
- /*
- * Check to see if the board failed any self tests.
- */
- if (rx_readl(dev, IndexRegs.Mailbox[7]) & SELF_TEST_FAILED) {
- printk(KERN_ERR "%s%d: adapter self-test failed.n", dev->name, instance);
- return -1;
- }
- /*
- * Check to see if the board panic'd while booting.
- */
- if (rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_PANIC) {
- printk(KERN_ERR "%s%d: adapter kernel panic'd.n", dev->name, instance);
- return -1;
- }
- start = jiffies;
- /*
- * Wait for the adapter to be up and running. Wait up to 3 minutes
- */
- while (!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
- {
- if(time_after(jiffies, start+180*HZ))
- {
- status = rx_readl(dev, IndexRegs.Mailbox[7]) >> 16;
- printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %ld.n", dev->name, instance, status);
- return -1;
- }
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- }
- if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
- {
- printk(KERN_ERR "%s%d: Interrupt unavailable.n", name, instance);
- return -1;
- }
- /*
- * Fill in the function dispatch table.
- */
- dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
- dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt;
- dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
- dev->a_ops.adapter_notify = aac_rx_notify_adapter;
- dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
- if (aac_init_adapter(dev) == NULL)
- return -1;
- /*
- * Start any kernel threads needed
- */
- dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
- /*
- * Tell the adapter that all is configured, and it can start
- * accepting requests
- */
- aac_rx_start_adapter(dev);
- return 0;
- }