/* * 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: * rkt.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/interrupt.h> #include <asm/semaphore.h> #include <scsi/scsi_host.h> #include "aacraid.h" static irqreturn_t aac_rkt_intr(int irq, void *dev_id, struct pt_regs *regs) { struct aac_dev *dev = dev_id; unsigned long bellbits; u8 intstat, mask; intstat = rkt_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 = rkt_readl(dev, OutboundDoorbellReg); if (bellbits & DoorBellPrintfReady) { aac_printf(dev, le32_to_cpu(rkt_readl (dev, IndexRegs.Mailbox[5]))); rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady); rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone); } else if (bellbits & DoorBellAdapterNormCmdReady) { aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady); } else if (bellbits & DoorBellAdapterNormRespReady) { aac_response_normal(&dev->queues->queue[HostNormRespQueue]); rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady); } else if (bellbits & DoorBellAdapterNormCmdNotFull) { rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); } else if (bellbits & DoorBellAdapterNormRespNotFull) { rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull); } return IRQ_HANDLED; } return IRQ_NONE; } /** * aac_rkt_enable_interrupt - Enable event reporting * @dev: Adapter * @event: Event to enable * * Enable event reporting from the i960 for a given event. */ static void aac_rkt_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_rkt_disable_interrupt - Disable event reporting * @dev: Adapter * @event: Event to enable * * Disable event reporting from the i960 for a given event. */ static void aac_rkt_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; } } /** * rkt_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 rkt_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status) { unsigned long start; int ok; /* * Write the command into Mailbox 0 */ rkt_writel(dev, InboundMailbox0, cpu_to_le32(command)); /* * Write the parameters into Mailboxes 1 - 4 */ rkt_writel(dev, InboundMailbox1, cpu_to_le32(p1)); rkt_writel(dev, InboundMailbox2, 0); rkt_writel(dev, InboundMailbox3, 0); rkt_writel(dev, InboundMailbox4, 0); /* * Clear the synch command doorbell to start on a clean slate. */ rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); /* * Disable doorbell interrupts */ rkt_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04); /* * Force the completion of the mask register write before issuing * the interrupt. */ rkt_readb (dev, MUnit.OIMR); /* * Signal that there is a new synch command */ rkt_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 (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) { /* * Clear the doorbell. */ rkt_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 */ rkt_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb); return -ETIMEDOUT; } /* * Pull the synch status from Mailbox 0. */ *status = le32_to_cpu(rkt_readl(dev, IndexRegs.Mailbox[0])); /* * Clear the synch command doorbell. */ rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); /* * Restore interrupt mask */ rkt_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb); return 0; } /** * aac_rkt_interrupt_adapter - interrupt adapter * @dev: Adapter * * Send an interrupt to the i960 and breakpoint it. */ static void aac_rkt_interrupt_adapter(struct aac_dev *dev) { u32 ret; rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret); } /** * aac_rkt_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_rkt_notify_adapter(struct aac_dev *dev, u32 event) { switch (event) { case AdapNormCmdQue: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1); break; case HostNormRespNotFull: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4); break; case AdapNormRespQue: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2); break; case HostNormCmdNotFull: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3); break; case HostShutdown: // rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret); break; case FastIo: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6); break; case AdapPrintfDone: rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5); break; default: BUG(); break; } } /** * aac_rkt_start_adapter - activate adapter * @dev: Adapter * * Start up processing on an i960 based AAC adapter */ static void aac_rkt_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. */ rkt_writeb(dev, MUnit.OIMR, 0xff); rkt_writel(dev, MUnit.ODR, 0xffffffff); // rkt_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK); rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); // We can only use a 32 bit address here rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status); } /** * aac_rkt_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_rkt_check_health(struct aac_dev *dev) { long status = rkt_readl(dev, IndexRegs.Mailbox[7]); /* * 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_rkt_check_health */ /** * aac_rkt_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_rkt_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.rkt = (struct rkt_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 (rkt_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 (rkt_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 (!(rkt_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING)) { if(time_after(jiffies, start+180*HZ)) { status = rkt_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_rkt_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_rkt_interrupt_adapter; dev->a_ops.adapter_enable_int = aac_rkt_enable_interrupt; dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt; dev->a_ops.adapter_notify = aac_rkt_notify_adapter; dev->a_ops.adapter_sync_cmd = rkt_sync_cmd; dev->a_ops.adapter_check_health = aac_rkt_check_health; 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); if(dev->thread_pid < 0) { printk(KERN_ERR "aacraid: Unable to create rkt thread.\n"); return -1; } /* * Tell the adapter that all is configured, and it can start * accepting requests */ aac_rkt_start_adapter(dev); return 0; }