| /* |
| * 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/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_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, int bled) |
| { |
| u32 var; |
| |
| if (bled) |
| printk(KERN_ERR "%s%d: adapter kernel panic'd %x.\n", |
| dev->name, dev->id, bled); |
| else |
| bled = aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS, |
| 0, 0, 0, 0, 0, 0, &var, NULL, NULL, NULL, NULL); |
| if (bled) |
| bled = aac_adapter_sync_cmd(dev, IOP_RESET, |
| 0, 0, 0, 0, 0, 0, &var, NULL, NULL, NULL, NULL); |
| |
| if (bled) |
| return -EINVAL; |
| if (var == 0x3803000F) { /* USE_OTHER_METHOD */ |
| rx_writel(dev, MUnit.reserved2, 3); |
| msleep(5000); /* Delay 5 seconds */ |
| var = 0x00000001; |
| } |
| if (var != 0x00000001) |
| return -EINVAL; |
| if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) |
| return -ENODEV; |
| 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 ((status = aac_rx_check_health(dev)) <= 0) |
| goto error_iounmap; |
| if (aac_rx_restart_adapter(dev, status)) |
| 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; |
| dev->a_ops.adapter_restart = aac_rx_restart_adapter; |
| |
| /* |
| * 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); |
| } |