diff options
Diffstat (limited to 'drivers/scsi/aacraid/sa.c')
| -rw-r--r-- | drivers/scsi/aacraid/sa.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/sa.c b/drivers/scsi/aacraid/sa.c new file mode 100644 index 0000000000..c9a1dad2f5 --- /dev/null +++ b/drivers/scsi/aacraid/sa.c @@ -0,0 +1,413 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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) 2000-2010 Adaptec, Inc. + * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com) + * 2016-2017 Microsemi Corp. (aacraid@microsemi.com) + * + * Module Name: + * sa.c + * + * Abstract: Drawbridge specific support functions + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/spinlock.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/completion.h> +#include <linux/time.h> +#include <linux/interrupt.h> + +#include <scsi/scsi_host.h> + +#include "aacraid.h" + +static irqreturn_t aac_sa_intr(int irq, void *dev_id) +{ + 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 + sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); + aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); + } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready + sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); + aac_response_normal(&dev->queues->queue[HostNormRespQueue]); + } 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_disable_interrupt - disable interrupt + * @dev: Which adapter to enable. + */ + +static void aac_sa_disable_interrupt (struct aac_dev *dev) +{ + sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); +} + +/** + * aac_sa_enable_interrupt - enable interrupt + * @dev: Which adapter to enable. + */ + +static void aac_sa_enable_interrupt (struct aac_dev *dev) +{ + sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | + DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); +} + +/** + * aac_sa_notify_adapter - handle adapter notification + * @dev: Adapter that notification is for + * @event: Event to notidy + * + * Notify the adapter of an event + */ + +static 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, 0, 0, 0, 0, 0, + NULL, NULL, NULL, NULL, NULL); + */ + 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 + * @p2: second parameter + * @p3: third parameter + * @p4: forth parameter + * @p5: fifth parameter + * @p6: sixth parameter + * @ret: adapter status + * @r1: first return value + * @r2: second return value + * @r3: third return value + * @r4: forth return value + * + * 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 p2, u32 p3, u32 p4, u32 p5, u32 p6, + u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4) +{ + 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, p2); + sa_writel(dev, Mailbox3, p3); + sa_writel(dev, Mailbox4, p4); + + /* + * 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; + } + msleep(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); + if (r1) + *r1 = sa_readl(dev, Mailbox1); + if (r2) + *r2 = sa_readl(dev, Mailbox2); + if (r3) + *r3 = sa_readl(dev, Mailbox3); + if (r4) + *r4 = sa_readl(dev, Mailbox4); + 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) +{ + sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, + NULL, NULL, NULL, NULL, NULL); +} + +/** + * 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) +{ + union aac_init *init; + /* + * Fill in the remaining pieces of the init. + */ + init = dev->init; + init->r7.host_elapsed_seconds = cpu_to_le32(ktime_get_real_seconds()); + /* We can only use a 32 bit address here */ + sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, + (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, + NULL, NULL, NULL, NULL, NULL); +} + +static int aac_sa_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type) +{ + return -EINVAL; +} + +/** + * 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_ioremap + * @dev: device to ioremap + * @size: mapping resize request + * + */ +static int aac_sa_ioremap(struct aac_dev * dev, u32 size) +{ + if (!size) { + iounmap(dev->regs.sa); + return 0; + } + dev->base = dev->regs.sa = ioremap(dev->base_start, size); + return (dev->base == NULL) ? -1 : 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; + + /* + * Fill in the function dispatch table. + */ + + dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; + dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; + dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt; + 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; + dev->a_ops.adapter_restart = aac_sa_restart_adapter; + dev->a_ops.adapter_start = aac_sa_start_adapter; + dev->a_ops.adapter_intr = aac_sa_intr; + dev->a_ops.adapter_deliver = aac_rx_deliver_producer; + dev->a_ops.adapter_ioremap = aac_sa_ioremap; + + if (aac_sa_ioremap(dev, dev->base_size)) { + printk(KERN_WARNING "%s: unable to map adapter.\n", name); + 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+startup_timeout*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; + } + msleep(1); + } + + /* + * First clear out all interrupts. Then enable the one's that + * we can handle. + */ + aac_adapter_disable_int(dev); + aac_adapter_enable_int(dev); + + if(aac_init_adapter(dev) == NULL) + goto error_irq; + dev->sync_mode = 0; /* sync. mode not supported */ + if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr, + IRQF_SHARED, "aacraid", (void *)dev) < 0) { + printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", + name, instance); + goto error_iounmap; + } + dev->dbg_base = dev->base_start; + dev->dbg_base_mapped = dev->base; + dev->dbg_size = dev->base_size; + + aac_adapter_enable_int(dev); + + /* + * Tell the adapter that all is configure, and it can start + * accepting requests + */ + aac_sa_start_adapter(dev); + return 0; + +error_irq: + aac_sa_disable_interrupt(dev); + free_irq(dev->pdev->irq, (void *)dev); + +error_iounmap: + + return -1; +} + |