/* * 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; }