/* * Adaptec AAC series RAID controller driver * (c) Copyright 2001 Red Hat Inc. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "aacraid.h" static irqreturn_t aac_rx_intr_producer(int irq, void *dev_id) { struct aac_dev *dev = dev_id; unsigned long bellbits; u8 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. * Check to see if this is our interrupt. If it isn't just return */ if (intstat & ~(dev->OIMR)) { bellbits = rx_readl(dev, OutboundDoorbellReg); if (bellbits & DoorBellPrintfReady) { aac_printf(dev, 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) { rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady); aac_response_normal(&dev->queues->queue[HostNormRespQueue]); } 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; } static irqreturn_t aac_rx_intr_message(int irq, void *dev_id) { struct aac_dev *dev = dev_id; u32 Index = rx_readl(dev, MUnit.OutboundQueue); if (Index == 0xFFFFFFFFL) Index = rx_readl(dev, MUnit.OutboundQueue); if (Index != 0xFFFFFFFFL) { do { if (aac_intr_normal(dev, Index)) { rx_writel(dev, MUnit.OutboundQueue, Index); rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady); } Index = rx_readl(dev, MUnit.OutboundQueue); } while (Index != 0xFFFFFFFFL); return IRQ_HANDLED; } return IRQ_NONE; } /** * aac_rx_disable_interrupt - Disable interrupts * @dev: Adapter */ static void aac_rx_disable_interrupt(struct aac_dev *dev) { rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); } /** * aac_rx_enable_interrupt_producer - Enable interrupts * @dev: Adapter */ static void aac_rx_enable_interrupt_producer(struct aac_dev *dev) { rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); } /** * aac_rx_enable_interrupt_message - Enable interrupts * @dev: Adapter */ static void aac_rx_enable_interrupt_message(struct aac_dev *dev) { rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7); } /** * 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 p2, u32 p3, u32 p4, u32 p5, u32 p6, u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4) { unsigned long start; int ok; /* * Write the command into Mailbox 0 */ writel(command, &dev->IndexRegs->Mailbox[0]); /* * Write the parameters into Mailboxes 1 - 6 */ writel(p1, &dev->IndexRegs->Mailbox[1]); writel(p2, &dev->IndexRegs->Mailbox[2]); writel(p3, &dev->IndexRegs->Mailbox[3]); writel(p4, &dev->IndexRegs->Mailbox[4]); /* * 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 = 0xff); /* * 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 */ msleep(1); } if (ok != 1) { /* * Restore interrupt mask even though we timed out */ aac_adapter_enable_int(dev); return -ETIMEDOUT; } /* * Pull the synch status from Mailbox 0. */ if (status) *status = readl(&dev->IndexRegs->Mailbox[0]); if (r1) *r1 = readl(&dev->IndexRegs->Mailbox[1]); if (r2) *r2 = readl(&dev->IndexRegs->Mailbox[2]); if (r3) *r3 = readl(&dev->IndexRegs->Mailbox[3]); if (r4) *r4 = readl(&dev->IndexRegs->Mailbox[4]); /* * Clear the synch command doorbell. */ rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); /* * Restore interrupt mask */ aac_adapter_enable_int(dev); 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) { rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); } /** * 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: 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 */ void aac_rx_start_adapter(struct aac_dev *dev) { struct aac_init *init; init = dev->init; init->HostElapsedSeconds = cpu_to_le32(get_seconds()); // We can only use a 32 bit address here rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); } /** * 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 { __le32 Post_Command; __le32 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, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS), post, paddr); if ((buffer[0] == '0') && ((buffer[1] == 'x') || (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_deliver_producer * @fib: fib to issue * * Will send a fib, returning 0 if successful. */ static int aac_rx_deliver_producer(struct fib * fib) { struct aac_dev *dev = fib->dev; struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue]; unsigned long qflags; u32 Index; unsigned long nointr = 0; spin_lock_irqsave(q->lock, qflags); aac_queue_get( dev, &Index, AdapNormCmdQueue, fib->hw_fib, 1, fib, &nointr); q->numpending++; *(q->headers.producer) = cpu_to_le32(Index + 1); spin_unlock_irqrestore(q->lock, qflags); if (!(nointr & aac_config.irq_mod)) aac_adapter_notify(dev, AdapNormCmdQueue); return 0; } /** * aac_rx_deliver_message * @fib: fib to issue * * Will send a fib, returning 0 if successful. */ static int aac_rx_deliver_message(struct fib * fib) { struct aac_dev *dev = fib->dev; struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue]; unsigned long qflags; u32 Index; u64 addr; volatile void __iomem *device; unsigned long count = 10000000L; /* 50 seconds */ spin_lock_irqsave(q->lock, qflags); q->numpending++; spin_unlock_irqrestore(q->lock, qflags); for(;;) { Index = rx_readl(dev, MUnit.InboundQueue); if (Index == 0xFFFFFFFFL) Index = rx_readl(dev, MUnit.InboundQueue); if (Index != 0xFFFFFFFFL) break; if (--count == 0) { spin_lock_irqsave(q->lock, qflags); q->numpending--; spin_unlock_irqrestore(q->lock, qflags); return -ETIMEDOUT; } udelay(5); } device = dev->base + Index; addr = fib->hw_fib_pa; writel((u32)(addr & 0xffffffff), device); device += sizeof(u32); writel((u32)(addr >> 32), device); device += sizeof(u32); writel(le16_to_cpu(fib->hw_fib->header.Size), device); rx_writel(dev, MUnit.InboundQueue, Index); return 0; } /** * aac_rx_ioremap * @size: mapping resize request * */ static int aac_rx_ioremap(struct aac_dev * dev, u32 size) { if (!size) { iounmap(dev->regs.rx); return 0; } dev->base = dev->regs.rx = ioremap(dev->scsi_host_ptr->base, size); if (dev->base == NULL) return -1; dev->IndexRegs = &dev->regs.rx->IndexRegs; return 0; } static int aac_rx_restart_adapter(struct aac_dev *dev) { u32 var; printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, dev->id); if (aac_rx_check_health(dev) <= 0) return 1; if (rx_sync_cmd(dev, IOP_RESET, 0, 0, 0, 0, 0, 0, &var, NULL, NULL, NULL, NULL)) return 1; if (var != 0x00000001) return 1; if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) return 1; return 0; } /** * aac_rx_select_comm - Select communications method * @dev: Adapter * @comm: communications method */ int aac_rx_select_comm(struct aac_dev *dev, int comm) { switch (comm) { case AAC_COMM_PRODUCER: dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_producer; dev->a_ops.adapter_intr = aac_rx_intr_producer; dev->a_ops.adapter_deliver = aac_rx_deliver_producer; break; case AAC_COMM_MESSAGE: dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_message; dev->a_ops.adapter_intr = aac_rx_intr_message; dev->a_ops.adapter_deliver = aac_rx_deliver_message; break; default: return 1; } 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; if (aac_adapter_ioremap(dev, dev->base_size)) { printk(KERN_WARNING "%s: unable to map adapter.\n", name); goto error_iounmap; } /* * Check to see if the board panic'd while booting. */ status = rx_readl(dev, MUnit.OMRx[0]); if (status & KERNEL_PANIC) if (aac_rx_restart_adapter(dev)) goto error_iounmap; /* * Check to see if the board failed any self tests. */ status = rx_readl(dev, MUnit.OMRx[0]); if (status & SELF_TEST_FAILED) { printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance); goto error_iounmap; } /* * Check to see if the monitor panic'd while booting. */ if (status & 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 (!((status = rx_readl(dev, MUnit.OMRx[0])) & KERNEL_UP_AND_RUNNING)) { if(time_after(jiffies, start+startup_timeout*HZ)) { printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", dev->name, instance, status); goto error_iounmap; } msleep(1); } /* * Fill in the common function dispatch table. */ dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter; 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; dev->a_ops.adapter_check_health = aac_rx_check_health; /* * First clear out all interrupts. Then enable the one's that we * can handle. */ aac_adapter_comm(dev, AAC_COMM_PRODUCER); aac_adapter_disable_int(dev); rx_writel(dev, MUnit.ODR, 0xffffffff); aac_adapter_enable_int(dev); if (aac_init_adapter(dev) == NULL) goto error_iounmap; aac_adapter_comm(dev, dev->comm_interface); if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr, IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) { printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance); goto error_iounmap; } aac_adapter_enable_int(dev); /* * Tell the adapter that all is configured, and it can * start accepting requests */ aac_rx_start_adapter(dev); return 0; error_iounmap: return -1; } int aac_rx_init(struct aac_dev *dev) { /* * Fill in the function dispatch table. */ dev->a_ops.adapter_ioremap = aac_rx_ioremap; dev->a_ops.adapter_comm = aac_rx_select_comm; return _aac_rx_init(dev); }