diff options
Diffstat (limited to 'drivers/scsi/aacraid/rx.c')
| -rw-r--r-- | drivers/scsi/aacraid/rx.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/rx.c b/drivers/scsi/aacraid/rx.c new file mode 100644 index 0000000..630b99e --- /dev/null +++ b/drivers/scsi/aacraid/rx.c @@ -0,0 +1,441 @@ +/* + * 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/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_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 = ~(dev->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) { + rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady); + aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); + } + 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); + } + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +/** + * 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 command 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, command); + /* + * Write the parameters into Mailboxes 1 - 4 + */ + rx_writel(dev, InboundMailbox1, 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, dev->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, dev->OIMR &= 0xfb); + return -ETIMEDOUT; + } + /* + * Pull the synch status from Mailbox 0. + */ + if (status) + *status = 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, dev->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(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 = (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, dev->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_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_rx_check_health(struct aac_dev *dev) +{ + u32 status = rx_readl(dev, MUnit.OMRx[0]); + + /* + * 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. + */ + if (status & KERNEL_PANIC) { + char * buffer; + struct POSTSTATUS { + u32 Post_Command; + u32 Post_Address; + } * post; + dma_addr_t paddr, baddr; + int ret; + + if ((status & 0xFF000000L) == 0xBC000000L) + return (status >> 16) & 0xFF; + buffer = pci_alloc_consistent(dev->pdev, 512, &baddr); + ret = -2; + if (buffer == NULL) + return ret; + post = pci_alloc_consistent(dev->pdev, + sizeof(struct POSTSTATUS), &paddr); + if (post == NULL) { + pci_free_consistent(dev->pdev, 512, buffer, baddr); + return ret; + } + memset(buffer, 0, 512); + post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS); + post->Post_Address = cpu_to_le32(baddr); + rx_writel(dev, MUnit.IMRx[0], paddr); + rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, &status); + pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS), + post, paddr); + if ((buffer[0] == '0') && (buffer[1] == 'x')) { + ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10); + ret <<= 4; + ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10); + } + pci_free_consistent(dev->pdev, 512, buffer, baddr); + return ret; + } + /* + * Wait for the adapter to be up and running. + */ + if (!(status & KERNEL_UP_AND_RUNNING)) + return -3; + /* + * Everything is OK + */ + return 0; +} + +/** + * aac_rx_init - initialize an i960 based AAC card + * @dev: device to configure + * + * 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 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.rx = 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, MUnit.OMRx[0]) & SELF_TEST_FAILED) { + printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance); + goto error_iounmap; + } + /* + * Check to see if the board panic'd while booting. + */ + if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) { + printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance); + goto error_iounmap; + } + /* + * Check to see if the monitor panic'd while booting. + */ + if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) { + printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance); + goto error_iounmap; + } + 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)) + || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING))) + { + if(time_after(jiffies, start+180*HZ)) + { + status = rx_readl(dev, IndexRegs.Mailbox[7]); + printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", + dev->name, instance, status); + goto error_iounmap; + } + 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); + goto error_iounmap; + } + /* + * Fill in the function dispatch table. + */ + dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter; + dev->a_ops.adapter_notify = aac_rx_notify_adapter; + dev->a_ops.adapter_sync_cmd = rx_sync_cmd; + dev->a_ops.adapter_check_health = aac_rx_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 rx thread.\n"); + goto error_kfree; + } + /* + * Tell the adapter that all is configured, and it can start + * accepting requests + */ + aac_rx_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.rx); + + return -1; +} |