--- /dev/null
+/*
+ * 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 PMC-Sierra, Inc. (aacraid@pmc-sierra.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:
+ * commsup.c
+ *
+ * Abstract: Contain all routines that are required for FSA host/adapter
+ * communication.
+ *
+ */
+
+#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/completion.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/interrupt.h>
+#include <linux/semaphore.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+
+#include "aacraid.h"
+
+/**
+ * fib_map_alloc - allocate the fib objects
+ * @dev: Adapter to allocate for
+ *
+ * Allocate and map the shared PCI space for the FIB blocks used to
+ * talk to the Adaptec firmware.
+ */
+
+static int fib_map_alloc(struct aac_dev *dev)
+{
+ dprintk((KERN_INFO
+ "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n",
+ dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue,
+ AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
+ dev->hw_fib_va = pci_alloc_consistent(dev->pdev,
+ (dev->max_fib_size + sizeof(struct aac_fib_xporthdr))
+ * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) + (ALIGN32 - 1),
+ &dev->hw_fib_pa);
+ if (dev->hw_fib_va == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+/**
+ * aac_fib_map_free - free the fib objects
+ * @dev: Adapter to free
+ *
+ * Free the PCI mappings and the memory allocated for FIB blocks
+ * on this adapter.
+ */
+
+void aac_fib_map_free(struct aac_dev *dev)
+{
+ pci_free_consistent(dev->pdev,
+ dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB),
+ dev->hw_fib_va, dev->hw_fib_pa);
+ dev->hw_fib_va = NULL;
+ dev->hw_fib_pa = 0;
+}
+
+/**
+ * aac_fib_setup - setup the fibs
+ * @dev: Adapter to set up
+ *
+ * Allocate the PCI space for the fibs, map it and then initialise the
+ * fib area, the unmapped fib data and also the free list
+ */
+
+int aac_fib_setup(struct aac_dev * dev)
+{
+ struct fib *fibptr;
+ struct hw_fib *hw_fib;
+ dma_addr_t hw_fib_pa;
+ int i;
+
+ while (((i = fib_map_alloc(dev)) == -ENOMEM)
+ && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
+ dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1);
+ dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB;
+ }
+ if (i<0)
+ return -ENOMEM;
+
+ /* 32 byte alignment for PMC */
+ hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
+ dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
+ (hw_fib_pa - dev->hw_fib_pa));
+ dev->hw_fib_pa = hw_fib_pa;
+ memset(dev->hw_fib_va, 0,
+ (dev->max_fib_size + sizeof(struct aac_fib_xporthdr)) *
+ (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
+
+ /* add Xport header */
+ dev->hw_fib_va = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
+ sizeof(struct aac_fib_xporthdr));
+ dev->hw_fib_pa += sizeof(struct aac_fib_xporthdr);
+
+ hw_fib = dev->hw_fib_va;
+ hw_fib_pa = dev->hw_fib_pa;
+ /*
+ * Initialise the fibs
+ */
+ for (i = 0, fibptr = &dev->fibs[i];
+ i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
+ i++, fibptr++)
+ {
+ fibptr->flags = 0;
+ fibptr->dev = dev;
+ fibptr->hw_fib_va = hw_fib;
+ fibptr->data = (void *) fibptr->hw_fib_va->data;
+ fibptr->next = fibptr+1; /* Forward chain the fibs */
+ sema_init(&fibptr->event_wait, 0);
+ spin_lock_init(&fibptr->event_lock);
+ hw_fib->header.XferState = cpu_to_le32(0xffffffff);
+ hw_fib->header.SenderSize = cpu_to_le16(dev->max_fib_size);
+ fibptr->hw_fib_pa = hw_fib_pa;
+ hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
+ dev->max_fib_size + sizeof(struct aac_fib_xporthdr));
+ hw_fib_pa = hw_fib_pa +
+ dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
+ }
+ /*
+ * Add the fib chain to the free list
+ */
+ dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
+ /*
+ * Enable this to debug out of queue space
+ */
+ dev->free_fib = &dev->fibs[0];
+ return 0;
+}
+
+/**
+ * aac_fib_alloc - allocate a fib
+ * @dev: Adapter to allocate the fib for
+ *
+ * Allocate a fib from the adapter fib pool. If the pool is empty we
+ * return NULL.
+ */
+
+struct fib *aac_fib_alloc(struct aac_dev *dev)
+{
+ struct fib * fibptr;
+ unsigned long flags;
+ spin_lock_irqsave(&dev->fib_lock, flags);
+ fibptr = dev->free_fib;
+ if(!fibptr){
+ spin_unlock_irqrestore(&dev->fib_lock, flags);
+ return fibptr;
+ }
+ dev->free_fib = fibptr->next;
+ spin_unlock_irqrestore(&dev->fib_lock, flags);
+ /*
+ * Set the proper node type code and node byte size
+ */
+ fibptr->type = FSAFS_NTC_FIB_CONTEXT;
+ fibptr->size = sizeof(struct fib);
+ /*
+ * Null out fields that depend on being zero at the start of
+ * each I/O
+ */
+ fibptr->hw_fib_va->header.XferState = 0;
+ fibptr->flags = 0;
+ fibptr->callback = NULL;
+ fibptr->callback_data = NULL;
+
+ return fibptr;
+}
+
+/**
+ * aac_fib_free - free a fib
+ * @fibptr: fib to free up
+ *
+ * Frees up a fib and places it on the appropriate queue
+ */
+
+void aac_fib_free(struct fib *fibptr)
+{
+ unsigned long flags;
+
+ if (fibptr->done == 2)
+ return;
+
+ spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
+ if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
+ aac_config.fib_timeouts++;
+ if (fibptr->hw_fib_va->header.XferState != 0) {
+ printk(KERN_WARNING "aac_fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
+ (void*)fibptr,
+ le32_to_cpu(fibptr->hw_fib_va->header.XferState));
+ }
+ fibptr->next = fibptr->dev->free_fib;
+ fibptr->dev->free_fib = fibptr;
+ spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
+}
+
+/**
+ * aac_fib_init - initialise a fib
+ * @fibptr: The fib to initialize
+ *
+ * Set up the generic fib fields ready for use
+ */
+
+void aac_fib_init(struct fib *fibptr)
+{
+ struct hw_fib *hw_fib = fibptr->hw_fib_va;
+
+ memset(&hw_fib->header, 0, sizeof(struct aac_fibhdr));
+ hw_fib->header.StructType = FIB_MAGIC;
+ hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size);
+ hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
+ hw_fib->header.u.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
+ hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size);
+}
+
+/**
+ * fib_deallocate - deallocate a fib
+ * @fibptr: fib to deallocate
+ *
+ * Will deallocate and return to the free pool the FIB pointed to by the
+ * caller.
+ */
+
+static void fib_dealloc(struct fib * fibptr)
+{
+ struct hw_fib *hw_fib = fibptr->hw_fib_va;
+ hw_fib->header.XferState = 0;
+}
+
+/*
+ * Commuication primitives define and support the queuing method we use to
+ * support host to adapter commuication. All queue accesses happen through
+ * these routines and are the only routines which have a knowledge of the
+ * how these queues are implemented.
+ */
+
+/**
+ * aac_get_entry - get a queue entry
+ * @dev: Adapter
+ * @qid: Queue Number
+ * @entry: Entry return
+ * @index: Index return
+ * @nonotify: notification control
+ *
+ * With a priority the routine returns a queue entry if the queue has free entries. If the queue
+ * is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
+ * returned.
+ */
+
+static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
+{
+ struct aac_queue * q;
+ unsigned long idx;
+
+ /*
+ * All of the queues wrap when they reach the end, so we check
+ * to see if they have reached the end and if they have we just
+ * set the index back to zero. This is a wrap. You could or off
+ * the high bits in all updates but this is a bit faster I think.
+ */
+
+ q = &dev->queues->queue[qid];
+
+ idx = *index = le32_to_cpu(*(q->headers.producer));
+ /* Interrupt Moderation, only interrupt for first two entries */
+ if (idx != le32_to_cpu(*(q->headers.consumer))) {
+ if (--idx == 0) {
+ if (qid == AdapNormCmdQueue)
+ idx = ADAP_NORM_CMD_ENTRIES;
+ else
+ idx = ADAP_NORM_RESP_ENTRIES;
+ }
+ if (idx != le32_to_cpu(*(q->headers.consumer)))
+ *nonotify = 1;
+ }
+
+ if (qid == AdapNormCmdQueue) {
+ if (*index >= ADAP_NORM_CMD_ENTRIES)
+ *index = 0; /* Wrap to front of the Producer Queue. */
+ } else {
+ if (*index >= ADAP_NORM_RESP_ENTRIES)
+ *index = 0; /* Wrap to front of the Producer Queue. */
+ }
+
+ /* Queue is full */
+ if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) {
+ printk(KERN_WARNING "Queue %d full, %u outstanding.\n",
+ qid, atomic_read(&q->numpending));
+ return 0;
+ } else {
+ *entry = q->base + *index;
+ return 1;
+ }
+}
+
+/**
+ * aac_queue_get - get the next free QE
+ * @dev: Adapter
+ * @index: Returned index
+ * @priority: Priority of fib
+ * @fib: Fib to associate with the queue entry
+ * @wait: Wait if queue full
+ * @fibptr: Driver fib object to go with fib
+ * @nonotify: Don't notify the adapter
+ *
+ * Gets the next free QE off the requested priorty adapter command
+ * queue and associates the Fib with the QE. The QE represented by
+ * index is ready to insert on the queue when this routine returns
+ * success.
+ */
+
+int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify)
+{
+ struct aac_entry * entry = NULL;
+ int map = 0;
+
+ if (qid == AdapNormCmdQueue) {
+ /* if no entries wait for some if caller wants to */
+ while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
+ printk(KERN_ERR "GetEntries failed\n");
+ }
+ /*
+ * Setup queue entry with a command, status and fib mapped
+ */
+ entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
+ map = 1;
+ } else {
+ while (!aac_get_entry(dev, qid, &entry, index, nonotify)) {
+ /* if no entries wait for some if caller wants to */
+ }
+ /*
+ * Setup queue entry with command, status and fib mapped
+ */
+ entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
+ entry->addr = hw_fib->header.SenderFibAddress;
+ /* Restore adapters pointer to the FIB */
+ hw_fib->header.u.ReceiverFibAddress = hw_fib->header.SenderFibAddress; /* Let the adapter now where to find its data */
+ map = 0;
+ }
+ /*
+ * If MapFib is true than we need to map the Fib and put pointers
+ * in the queue entry.
+ */
+ if (map)
+ entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
+ return 0;
+}
+
+/*
+ * Define the highest level of host to adapter communication routines.
+ * These routines will support host to adapter FS commuication. These
+ * routines have no knowledge of the commuication method used. This level
+ * sends and receives FIBs. This level has no knowledge of how these FIBs
+ * get passed back and forth.
+ */
+
+/**
+ * aac_fib_send - send a fib to the adapter
+ * @command: Command to send
+ * @fibptr: The fib
+ * @size: Size of fib data area
+ * @priority: Priority of Fib
+ * @wait: Async/sync select
+ * @reply: True if a reply is wanted
+ * @callback: Called with reply
+ * @callback_data: Passed to callback
+ *
+ * Sends the requested FIB to the adapter and optionally will wait for a
+ * response FIB. If the caller does not wish to wait for a response than
+ * an event to wait on must be supplied. This event will be set when a
+ * response FIB is received from the adapter.
+ */
+
+int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
+ int priority, int wait, int reply, fib_callback callback,
+ void *callback_data)
+{
+ struct aac_dev * dev = fibptr->dev;
+ struct hw_fib * hw_fib = fibptr->hw_fib_va;
+ unsigned long flags = 0;
+ unsigned long mflags = 0;
+ unsigned long sflags = 0;
+
+
+ if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
+ return -EBUSY;
+ /*
+ * There are 5 cases with the wait and response requested flags.
+ * The only invalid cases are if the caller requests to wait and
+ * does not request a response and if the caller does not want a
+ * response and the Fib is not allocated from pool. If a response
+ * is not requesed the Fib will just be deallocaed by the DPC
+ * routine when the response comes back from the adapter. No
+ * further processing will be done besides deleting the Fib. We
+ * will have a debug mode where the adapter can notify the host
+ * it had a problem and the host can log that fact.
+ */
+ fibptr->flags = 0;
+ if (wait && !reply) {
+ return -EINVAL;
+ } else if (!wait && reply) {
+ hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
+ } else if (!wait && !reply) {
+ hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
+ } else if (wait && reply) {
+ hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.NormalSent);
+ }
+ /*
+ * Map the fib into 32bits by using the fib number
+ */
+
+ hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2);
+ hw_fib->header.Handle = (u32)(fibptr - dev->fibs) + 1;
+ /*
+ * Set FIB state to indicate where it came from and if we want a
+ * response from the adapter. Also load the command from the
+ * caller.
+ *
+ * Map the hw fib pointer as a 32bit value
+ */
+ hw_fib->header.Command = cpu_to_le16(command);
+ hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
+ /*
+ * Set the size of the Fib we want to send to the adapter
+ */
+ hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
+ if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
+ return -EMSGSIZE;
+ }
+ /*
+ * Get a queue entry connect the FIB to it and send an notify
+ * the adapter a command is ready.
+ */
+ hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
+
+ /*
+ * Fill in the Callback and CallbackContext if we are not
+ * going to wait.
+ */
+ if (!wait) {
+ fibptr->callback = callback;
+ fibptr->callback_data = callback_data;
+ fibptr->flags = FIB_CONTEXT_FLAG;
+ }
+
+ fibptr->done = 0;
+
+ FIB_COUNTER_INCREMENT(aac_config.FibsSent);
+
+ dprintk((KERN_DEBUG "Fib contents:.\n"));
+ dprintk((KERN_DEBUG " Command = %d.\n", le32_to_cpu(hw_fib->header.Command)));
+ dprintk((KERN_DEBUG " SubCommand = %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command)));
+ dprintk((KERN_DEBUG " XferState = %x.\n", le32_to_cpu(hw_fib->header.XferState)));
+ dprintk((KERN_DEBUG " hw_fib va being sent=%p\n",fibptr->hw_fib_va));
+ dprintk((KERN_DEBUG " hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
+ dprintk((KERN_DEBUG " fib being sent=%p\n",fibptr));
+
+ if (!dev->queues)
+ return -EBUSY;
+
+ if (wait) {
+
+ spin_lock_irqsave(&dev->manage_lock, mflags);
+ if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
+ printk(KERN_INFO "No management Fibs Available:%d\n",
+ dev->management_fib_count);
+ spin_unlock_irqrestore(&dev->manage_lock, mflags);
+ return -EBUSY;
+ }
+ dev->management_fib_count++;
+ spin_unlock_irqrestore(&dev->manage_lock, mflags);
+ spin_lock_irqsave(&fibptr->event_lock, flags);
+ }
+
+ if (dev->sync_mode) {
+ if (wait)
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ spin_lock_irqsave(&dev->sync_lock, sflags);
+ if (dev->sync_fib) {
+ list_add_tail(&fibptr->fiblink, &dev->sync_fib_list);
+ spin_unlock_irqrestore(&dev->sync_lock, sflags);
+ } else {
+ dev->sync_fib = fibptr;
+ spin_unlock_irqrestore(&dev->sync_lock, sflags);
+ aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
+ (u32)fibptr->hw_fib_pa, 0, 0, 0, 0, 0,
+ NULL, NULL, NULL, NULL, NULL);
+ }
+ if (wait) {
+ fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
+ if (down_interruptible(&fibptr->event_wait)) {
+ fibptr->flags &= ~FIB_CONTEXT_FLAG_WAIT;
+ return -EFAULT;
+ }
+ return 0;
+ }
+ return -EINPROGRESS;
+ }
+
+ if (aac_adapter_deliver(fibptr) != 0) {
+ printk(KERN_ERR "aac_fib_send: returned -EBUSY\n");
+ if (wait) {
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ spin_lock_irqsave(&dev->manage_lock, mflags);
+ dev->management_fib_count--;
+ spin_unlock_irqrestore(&dev->manage_lock, mflags);
+ }
+ return -EBUSY;
+ }
+
+
+ /*
+ * If the caller wanted us to wait for response wait now.
+ */
+
+ if (wait) {
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ /* Only set for first known interruptable command */
+ if (wait < 0) {
+ /*
+ * *VERY* Dangerous to time out a command, the
+ * assumption is made that we have no hope of
+ * functioning because an interrupt routing or other
+ * hardware failure has occurred.
+ */
+ unsigned long timeout = jiffies + (180 * HZ); /* 3 minutes */
+ while (down_trylock(&fibptr->event_wait)) {
+ int blink;
+ if (time_is_before_eq_jiffies(timeout)) {
+ struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
+ atomic_dec(&q->numpending);
+ if (wait == -1) {
+ printk(KERN_ERR "aacraid: aac_fib_send: first asynchronous command timed out.\n"
+ "Usually a result of a PCI interrupt routing problem;\n"
+ "update mother board BIOS or consider utilizing one of\n"
+ "the SAFE mode kernel options (acpi, apic etc)\n");
+ }
+ return -ETIMEDOUT;
+ }
+ if ((blink = aac_adapter_check_health(dev)) > 0) {
+ if (wait == -1) {
+ printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
+ "Usually a result of a serious unrecoverable hardware problem\n",
+ blink);
+ }
+ return -EFAULT;
+ }
+ /* We used to udelay() here but that absorbed
+ * a CPU when a timeout occured. Not very
+ * useful. */
+ cpu_relax();
+ }
+ } else if (down_interruptible(&fibptr->event_wait)) {
+ /* Do nothing ... satisfy
+ * down_interruptible must_check */
+ }
+
+ spin_lock_irqsave(&fibptr->event_lock, flags);
+ if (fibptr->done == 0) {
+ fibptr->done = 2; /* Tell interrupt we aborted */
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ return -ERESTARTSYS;
+ }
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ BUG_ON(fibptr->done == 0);
+
+ if(unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
+ return -ETIMEDOUT;
+ return 0;
+ }
+ /*
+ * If the user does not want a response than return success otherwise
+ * return pending
+ */
+ if (reply)
+ return -EINPROGRESS;
+ else
+ return 0;
+}
+
+/**
+ * aac_consumer_get - get the top of the queue
+ * @dev: Adapter
+ * @q: Queue
+ * @entry: Return entry
+ *
+ * Will return a pointer to the entry on the top of the queue requested that
+ * we are a consumer of, and return the address of the queue entry. It does
+ * not change the state of the queue.
+ */
+
+int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
+{
+ u32 index;
+ int status;
+ if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
+ status = 0;
+ } else {
+ /*
+ * The consumer index must be wrapped if we have reached
+ * the end of the queue, else we just use the entry
+ * pointed to by the header index
+ */
+ if (le32_to_cpu(*q->headers.consumer) >= q->entries)
+ index = 0;
+ else
+ index = le32_to_cpu(*q->headers.consumer);
+ *entry = q->base + index;
+ status = 1;
+ }
+ return(status);
+}
+
+/**
+ * aac_consumer_free - free consumer entry
+ * @dev: Adapter
+ * @q: Queue
+ * @qid: Queue ident
+ *
+ * Frees up the current top of the queue we are a consumer of. If the
+ * queue was full notify the producer that the queue is no longer full.
+ */
+
+void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
+{
+ int wasfull = 0;
+ u32 notify;
+
+ if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
+ wasfull = 1;
+
+ if (le32_to_cpu(*q->headers.consumer) >= q->entries)
+ *q->headers.consumer = cpu_to_le32(1);
+ else
+ le32_add_cpu(q->headers.consumer, 1);
+
+ if (wasfull) {
+ switch (qid) {
+
+ case HostNormCmdQueue:
+ notify = HostNormCmdNotFull;
+ break;
+ case HostNormRespQueue:
+ notify = HostNormRespNotFull;
+ break;
+ default:
+ BUG();
+ return;
+ }
+ aac_adapter_notify(dev, notify);
+ }
+}
+
+/**
+ * aac_fib_adapter_complete - complete adapter issued fib
+ * @fibptr: fib to complete
+ * @size: size of fib
+ *
+ * Will do all necessary work to complete a FIB that was sent from
+ * the adapter.
+ */
+
+int aac_fib_adapter_complete(struct fib *fibptr, unsigned short size)
+{
+ struct hw_fib * hw_fib = fibptr->hw_fib_va;
+ struct aac_dev * dev = fibptr->dev;
+ struct aac_queue * q;
+ unsigned long nointr = 0;
+ unsigned long qflags;
+
+ if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1 ||
+ dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
+ kfree(hw_fib);
+ return 0;
+ }
+
+ if (hw_fib->header.XferState == 0) {
+ if (dev->comm_interface == AAC_COMM_MESSAGE)
+ kfree(hw_fib);
+ return 0;
+ }
+ /*
+ * If we plan to do anything check the structure type first.
+ */
+ if (hw_fib->header.StructType != FIB_MAGIC &&
+ hw_fib->header.StructType != FIB_MAGIC2 &&
+ hw_fib->header.StructType != FIB_MAGIC2_64) {
+ if (dev->comm_interface == AAC_COMM_MESSAGE)
+ kfree(hw_fib);
+ return -EINVAL;
+ }
+ /*
+ * This block handles the case where the adapter had sent us a
+ * command and we have finished processing the command. We
+ * call completeFib when we are done processing the command
+ * and want to send a response back to the adapter. This will
+ * send the completed cdb to the adapter.
+ */
+ if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
+ if (dev->comm_interface == AAC_COMM_MESSAGE) {
+ kfree (hw_fib);
+ } else {
+ u32 index;
+ hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
+ if (size) {
+ size += sizeof(struct aac_fibhdr);
+ if (size > le16_to_cpu(hw_fib->header.SenderSize))
+ return -EMSGSIZE;
+ hw_fib->header.Size = cpu_to_le16(size);
+ }
+ q = &dev->queues->queue[AdapNormRespQueue];
+ spin_lock_irqsave(q->lock, qflags);
+ aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr);
+ *(q->headers.producer) = cpu_to_le32(index + 1);
+ spin_unlock_irqrestore(q->lock, qflags);
+ if (!(nointr & (int)aac_config.irq_mod))
+ aac_adapter_notify(dev, AdapNormRespQueue);
+ }
+ } else {
+ printk(KERN_WARNING "aac_fib_adapter_complete: "
+ "Unknown xferstate detected.\n");
+ BUG();
+ }
+ return 0;
+}
+
+/**
+ * aac_fib_complete - fib completion handler
+ * @fib: FIB to complete
+ *
+ * Will do all necessary work to complete a FIB.
+ */
+
+int aac_fib_complete(struct fib *fibptr)
+{
+ struct hw_fib * hw_fib = fibptr->hw_fib_va;
+
+ /*
+ * Check for a fib which has already been completed
+ */
+
+ if (hw_fib->header.XferState == 0)
+ return 0;
+ /*
+ * If we plan to do anything check the structure type first.
+ */
+
+ if (hw_fib->header.StructType != FIB_MAGIC &&
+ hw_fib->header.StructType != FIB_MAGIC2 &&
+ hw_fib->header.StructType != FIB_MAGIC2_64)
+ return -EINVAL;
+ /*
+ * This block completes a cdb which orginated on the host and we
+ * just need to deallocate the cdb or reinit it. At this point the
+ * command is complete that we had sent to the adapter and this
+ * cdb could be reused.
+ */
+
+ if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
+ (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
+ {
+ fib_dealloc(fibptr);
+ }
+ else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
+ {
+ /*
+ * This handles the case when the host has aborted the I/O
+ * to the adapter because the adapter is not responding
+ */
+ fib_dealloc(fibptr);
+ } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
+ fib_dealloc(fibptr);
+ } else {
+ BUG();
+ }
+ return 0;
+}
+
+/**
+ * aac_printf - handle printf from firmware
+ * @dev: Adapter
+ * @val: Message info
+ *
+ * Print a message passed to us by the controller firmware on the
+ * Adaptec board
+ */
+
+void aac_printf(struct aac_dev *dev, u32 val)
+{
+ char *cp = dev->printfbuf;
+ if (dev->printf_enabled)
+ {
+ int length = val & 0xffff;
+ int level = (val >> 16) & 0xffff;
+
+ /*
+ * The size of the printfbuf is set in port.c
+ * There is no variable or define for it
+ */
+ if (length > 255)
+ length = 255;
+ if (cp[length] != 0)
+ cp[length] = 0;
+ if (level == LOG_AAC_HIGH_ERROR)
+ printk(KERN_WARNING "%s:%s", dev->name, cp);
+ else
+ printk(KERN_INFO "%s:%s", dev->name, cp);
+ }
+ memset(cp, 0, 256);
+}
+
+
+/**
+ * aac_handle_aif - Handle a message from the firmware
+ * @dev: Which adapter this fib is from
+ * @fibptr: Pointer to fibptr from adapter
+ *
+ * This routine handles a driver notify fib from the adapter and
+ * dispatches it to the appropriate routine for handling.
+ */
+
+#define AIF_SNIFF_TIMEOUT (500*HZ)
+static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
+{
+ struct hw_fib * hw_fib = fibptr->hw_fib_va;
+ struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data;
+ u32 channel, id, lun, container;
+ struct scsi_device *device;
+ enum {
+ NOTHING,
+ DELETE,
+ ADD,
+ CHANGE
+ } device_config_needed = NOTHING;
+
+ /* Sniff for container changes */
+
+ if (!dev || !dev->fsa_dev)
+ return;
+ container = channel = id = lun = (u32)-1;
+
+ /*
+ * We have set this up to try and minimize the number of
+ * re-configures that take place. As a result of this when
+ * certain AIF's come in we will set a flag waiting for another
+ * type of AIF before setting the re-config flag.
+ */
+ switch (le32_to_cpu(aifcmd->command)) {
+ case AifCmdDriverNotify:
+ switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
+ case AifRawDeviceRemove:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if ((container >> 28)) {
+ container = (u32)-1;
+ break;
+ }
+ channel = (container >> 24) & 0xF;
+ if (channel >= dev->maximum_num_channels) {
+ container = (u32)-1;
+ break;
+ }
+ id = container & 0xFFFF;
+ if (id >= dev->maximum_num_physicals) {
+ container = (u32)-1;
+ break;
+ }
+ lun = (container >> 16) & 0xFF;
+ container = (u32)-1;
+ channel = aac_phys_to_logical(channel);
+ device_config_needed =
+ (((__le32 *)aifcmd->data)[0] ==
+ cpu_to_le32(AifRawDeviceRemove)) ? DELETE : ADD;
+
+ if (device_config_needed == ADD) {
+ device = scsi_device_lookup(
+ dev->scsi_host_ptr,
+ channel, id, lun);
+ if (device) {
+ scsi_remove_device(device);
+ scsi_device_put(device);
+ }
+ }
+ break;
+ /*
+ * Morph or Expand complete
+ */
+ case AifDenMorphComplete:
+ case AifDenVolumeExtendComplete:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if (container >= dev->maximum_num_containers)
+ break;
+
+ /*
+ * Find the scsi_device associated with the SCSI
+ * address. Make sure we have the right array, and if
+ * so set the flag to initiate a new re-config once we
+ * see an AifEnConfigChange AIF come through.
+ */
+
+ if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) {
+ device = scsi_device_lookup(dev->scsi_host_ptr,
+ CONTAINER_TO_CHANNEL(container),
+ CONTAINER_TO_ID(container),
+ CONTAINER_TO_LUN(container));
+ if (device) {
+ dev->fsa_dev[container].config_needed = CHANGE;
+ dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
+ dev->fsa_dev[container].config_waiting_stamp = jiffies;
+ scsi_device_put(device);
+ }
+ }
+ }
+
+ /*
+ * If we are waiting on something and this happens to be
+ * that thing then set the re-configure flag.
+ */
+ if (container != (u32)-1) {
+ if (container >= dev->maximum_num_containers)
+ break;
+ if ((dev->fsa_dev[container].config_waiting_on ==
+ le32_to_cpu(*(__le32 *)aifcmd->data)) &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
+ dev->fsa_dev[container].config_waiting_on = 0;
+ } else for (container = 0;
+ container < dev->maximum_num_containers; ++container) {
+ if ((dev->fsa_dev[container].config_waiting_on ==
+ le32_to_cpu(*(__le32 *)aifcmd->data)) &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
+ dev->fsa_dev[container].config_waiting_on = 0;
+ }
+ break;
+
+ case AifCmdEventNotify:
+ switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) {
+ case AifEnBatteryEvent:
+ dev->cache_protected =
+ (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3));
+ break;
+ /*
+ * Add an Array.
+ */
+ case AifEnAddContainer:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if (container >= dev->maximum_num_containers)
+ break;
+ dev->fsa_dev[container].config_needed = ADD;
+ dev->fsa_dev[container].config_waiting_on =
+ AifEnConfigChange;
+ dev->fsa_dev[container].config_waiting_stamp = jiffies;
+ break;
+
+ /*
+ * Delete an Array.
+ */
+ case AifEnDeleteContainer:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if (container >= dev->maximum_num_containers)
+ break;
+ dev->fsa_dev[container].config_needed = DELETE;
+ dev->fsa_dev[container].config_waiting_on =
+ AifEnConfigChange;
+ dev->fsa_dev[container].config_waiting_stamp = jiffies;
+ break;
+
+ /*
+ * Container change detected. If we currently are not
+ * waiting on something else, setup to wait on a Config Change.
+ */
+ case AifEnContainerChange:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if (container >= dev->maximum_num_containers)
+ break;
+ if (dev->fsa_dev[container].config_waiting_on &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
+ break;
+ dev->fsa_dev[container].config_needed = CHANGE;
+ dev->fsa_dev[container].config_waiting_on =
+ AifEnConfigChange;
+ dev->fsa_dev[container].config_waiting_stamp = jiffies;
+ break;
+
+ case AifEnConfigChange:
+ break;
+
+ case AifEnAddJBOD:
+ case AifEnDeleteJBOD:
+ container = le32_to_cpu(((__le32 *)aifcmd->data)[1]);
+ if ((container >> 28)) {
+ container = (u32)-1;
+ break;
+ }
+ channel = (container >> 24) & 0xF;
+ if (channel >= dev->maximum_num_channels) {
+ container = (u32)-1;
+ break;
+ }
+ id = container & 0xFFFF;
+ if (id >= dev->maximum_num_physicals) {
+ container = (u32)-1;
+ break;
+ }
+ lun = (container >> 16) & 0xFF;
+ container = (u32)-1;
+ channel = aac_phys_to_logical(channel);
+ device_config_needed =
+ (((__le32 *)aifcmd->data)[0] ==
+ cpu_to_le32(AifEnAddJBOD)) ? ADD : DELETE;
+ if (device_config_needed == ADD) {
+ device = scsi_device_lookup(dev->scsi_host_ptr,
+ channel,
+ id,
+ lun);
+ if (device) {
+ scsi_remove_device(device);
+ scsi_device_put(device);
+ }
+ }
+ break;
+
+ case AifEnEnclosureManagement:
+ /*
+ * If in JBOD mode, automatic exposure of new
+ * physical target to be suppressed until configured.
+ */
+ if (dev->jbod)
+ break;
+ switch (le32_to_cpu(((__le32 *)aifcmd->data)[3])) {
+ case EM_DRIVE_INSERTION:
+ case EM_DRIVE_REMOVAL:
+ case EM_SES_DRIVE_INSERTION:
+ case EM_SES_DRIVE_REMOVAL:
+ container = le32_to_cpu(
+ ((__le32 *)aifcmd->data)[2]);
+ if ((container >> 28)) {
+ container = (u32)-1;
+ break;
+ }
+ channel = (container >> 24) & 0xF;
+ if (channel >= dev->maximum_num_channels) {
+ container = (u32)-1;
+ break;
+ }
+ id = container & 0xFFFF;
+ lun = (container >> 16) & 0xFF;
+ container = (u32)-1;
+ if (id >= dev->maximum_num_physicals) {
+ /* legacy dev_t ? */
+ if ((0x2000 <= id) || lun || channel ||
+ ((channel = (id >> 7) & 0x3F) >=
+ dev->maximum_num_channels))
+ break;
+ lun = (id >> 4) & 7;
+ id &= 0xF;
+ }
+ channel = aac_phys_to_logical(channel);
+ device_config_needed =
+ ((((__le32 *)aifcmd->data)[3]
+ == cpu_to_le32(EM_DRIVE_INSERTION)) ||
+ (((__le32 *)aifcmd->data)[3]
+ == cpu_to_le32(EM_SES_DRIVE_INSERTION))) ?
+ ADD : DELETE;
+ break;
+ }
+ break;
+ }
+
+ /*
+ * If we are waiting on something and this happens to be
+ * that thing then set the re-configure flag.
+ */
+ if (container != (u32)-1) {
+ if (container >= dev->maximum_num_containers)
+ break;
+ if ((dev->fsa_dev[container].config_waiting_on ==
+ le32_to_cpu(*(__le32 *)aifcmd->data)) &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
+ dev->fsa_dev[container].config_waiting_on = 0;
+ } else for (container = 0;
+ container < dev->maximum_num_containers; ++container) {
+ if ((dev->fsa_dev[container].config_waiting_on ==
+ le32_to_cpu(*(__le32 *)aifcmd->data)) &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
+ dev->fsa_dev[container].config_waiting_on = 0;
+ }
+ break;
+
+ case AifCmdJobProgress:
+ /*
+ * These are job progress AIF's. When a Clear is being
+ * done on a container it is initially created then hidden from
+ * the OS. When the clear completes we don't get a config
+ * change so we monitor the job status complete on a clear then
+ * wait for a container change.
+ */
+
+ if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
+ (((__le32 *)aifcmd->data)[6] == ((__le32 *)aifcmd->data)[5] ||
+ ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess))) {
+ for (container = 0;
+ container < dev->maximum_num_containers;
+ ++container) {
+ /*
+ * Stomp on all config sequencing for all
+ * containers?
+ */
+ dev->fsa_dev[container].config_waiting_on =
+ AifEnContainerChange;
+ dev->fsa_dev[container].config_needed = ADD;
+ dev->fsa_dev[container].config_waiting_stamp =
+ jiffies;
+ }
+ }
+ if (((__le32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero) &&
+ ((__le32 *)aifcmd->data)[6] == 0 &&
+ ((__le32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning)) {
+ for (container = 0;
+ container < dev->maximum_num_containers;
+ ++container) {
+ /*
+ * Stomp on all config sequencing for all
+ * containers?
+ */
+ dev->fsa_dev[container].config_waiting_on =
+ AifEnContainerChange;
+ dev->fsa_dev[container].config_needed = DELETE;
+ dev->fsa_dev[container].config_waiting_stamp =
+ jiffies;
+ }
+ }
+ break;
+ }
+
+ container = 0;
+retry_next:
+ if (device_config_needed == NOTHING)
+ for (; container < dev->maximum_num_containers; ++container) {
+ if ((dev->fsa_dev[container].config_waiting_on == 0) &&
+ (dev->fsa_dev[container].config_needed != NOTHING) &&
+ time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
+ device_config_needed =
+ dev->fsa_dev[container].config_needed;
+ dev->fsa_dev[container].config_needed = NOTHING;
+ channel = CONTAINER_TO_CHANNEL(container);
+ id = CONTAINER_TO_ID(container);
+ lun = CONTAINER_TO_LUN(container);
+ break;
+ }
+ }
+ if (device_config_needed == NOTHING)
+ return;
+
+ /*
+ * If we decided that a re-configuration needs to be done,
+ * schedule it here on the way out the door, please close the door
+ * behind you.
+ */
+
+ /*
+ * Find the scsi_device associated with the SCSI address,
+ * and mark it as changed, invalidating the cache. This deals
+ * with changes to existing device IDs.
+ */
+
+ if (!dev || !dev->scsi_host_ptr)
+ return;
+ /*
+ * force reload of disk info via aac_probe_container
+ */
+ if ((channel == CONTAINER_CHANNEL) &&
+ (device_config_needed != NOTHING)) {
+ if (dev->fsa_dev[container].valid == 1)
+ dev->fsa_dev[container].valid = 2;
+ aac_probe_container(dev, container);
+ }
+ device = scsi_device_lookup(dev->scsi_host_ptr, channel, id, lun);
+ if (device) {
+ switch (device_config_needed) {
+ case DELETE:
+#if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
+ scsi_remove_device(device);
+#else
+ if (scsi_device_online(device)) {
+ scsi_device_set_state(device, SDEV_OFFLINE);
+ sdev_printk(KERN_INFO, device,
+ "Device offlined - %s\n",
+ (channel == CONTAINER_CHANNEL) ?
+ "array deleted" :
+ "enclosure services event");
+ }
+#endif
+ break;
+ case ADD:
+ if (!scsi_device_online(device)) {
+ sdev_printk(KERN_INFO, device,
+ "Device online - %s\n",
+ (channel == CONTAINER_CHANNEL) ?
+ "array created" :
+ "enclosure services event");
+ scsi_device_set_state(device, SDEV_RUNNING);
+ }
+ /* FALLTHRU */
+ case CHANGE:
+ if ((channel == CONTAINER_CHANNEL)
+ && (!dev->fsa_dev[container].valid)) {
+#if (defined(AAC_DEBUG_INSTRUMENT_AIF_DELETE))
+ scsi_remove_device(device);
+#else
+ if (!scsi_device_online(device))
+ break;
+ scsi_device_set_state(device, SDEV_OFFLINE);
+ sdev_printk(KERN_INFO, device,
+ "Device offlined - %s\n",
+ "array failed");
+#endif
+ break;
+ }
+ scsi_rescan_device(&device->sdev_gendev);
+
+ default:
+ break;
+ }
+ scsi_device_put(device);
+ device_config_needed = NOTHING;
+ }
+ if (device_config_needed == ADD)
+ scsi_add_device(dev->scsi_host_ptr, channel, id, lun);
+ if (channel == CONTAINER_CHANNEL) {
+ container++;
+ device_config_needed = NOTHING;
+ goto retry_next;
+ }
+}
+
+static int _aac_reset_adapter(struct aac_dev *aac, int forced)
+{
+ int index, quirks;
+ int retval, i;
+ struct Scsi_Host *host;
+ struct scsi_device *dev;
+ struct scsi_cmnd *command;
+ struct scsi_cmnd *command_list;
+ int jafo = 0;
+ int cpu;
+
+ /*
+ * Assumptions:
+ * - host is locked, unless called by the aacraid thread.
+ * (a matter of convenience, due to legacy issues surrounding
+ * eh_host_adapter_reset).
+ * - in_reset is asserted, so no new i/o is getting to the
+ * card.
+ * - The card is dead, or will be very shortly ;-/ so no new
+ * commands are completing in the interrupt service.
+ */
+ host = aac->scsi_host_ptr;
+ scsi_block_requests(host);
+ aac_adapter_disable_int(aac);
+ if (aac->thread->pid != current->pid) {
+ spin_unlock_irq(host->host_lock);
+ kthread_stop(aac->thread);
+ jafo = 1;
+ }
+
+ /*
+ * If a positive health, means in a known DEAD PANIC
+ * state and the adapter could be reset to `try again'.
+ */
+ retval = aac_adapter_restart(aac, forced ? 0 : aac_adapter_check_health(aac));
+
+ if (retval)
+ goto out;
+
+ /*
+ * Loop through the fibs, close the synchronous FIBS
+ */
+ for (retval = 1, index = 0; index < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); index++) {
+ struct fib *fib = &aac->fibs[index];
+ if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
+ (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected))) {
+ unsigned long flagv;
+ spin_lock_irqsave(&fib->event_lock, flagv);
+ up(&fib->event_wait);
+ spin_unlock_irqrestore(&fib->event_lock, flagv);
+ schedule();
+ retval = 0;
+ }
+ }
+ /* Give some extra time for ioctls to complete. */
+ if (retval == 0)
+ ssleep(2);
+ index = aac->cardtype;
+
+ /*
+ * Re-initialize the adapter, first free resources, then carefully
+ * apply the initialization sequence to come back again. Only risk
+ * is a change in Firmware dropping cache, it is assumed the caller
+ * will ensure that i/o is queisced and the card is flushed in that
+ * case.
+ */
+ aac_fib_map_free(aac);
+ pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
+ aac->comm_addr = NULL;
+ aac->comm_phys = 0;
+ kfree(aac->queues);
+ aac->queues = NULL;
+ cpu = cpumask_first(cpu_online_mask);
+ if (aac->pdev->device == PMC_DEVICE_S6 ||
+ aac->pdev->device == PMC_DEVICE_S7 ||
+ aac->pdev->device == PMC_DEVICE_S8 ||
+ aac->pdev->device == PMC_DEVICE_S9) {
+ if (aac->max_msix > 1) {
+ for (i = 0; i < aac->max_msix; i++) {
+ if (irq_set_affinity_hint(
+ aac->msixentry[i].vector,
+ NULL)) {
+ printk(KERN_ERR "%s%d: Failed to reset IRQ affinity for cpu %d\n",
+ aac->name,
+ aac->id,
+ cpu);
+ }
+ cpu = cpumask_next(cpu,
+ cpu_online_mask);
+ free_irq(aac->msixentry[i].vector,
+ &(aac->aac_msix[i]));
+ }
+ pci_disable_msix(aac->pdev);
+ } else {
+ free_irq(aac->pdev->irq, &(aac->aac_msix[0]));
+ }
+ } else {
+ free_irq(aac->pdev->irq, aac);
+ }
+ if (aac->msi)
+ pci_disable_msi(aac->pdev);
+ kfree(aac->fsa_dev);
+ aac->fsa_dev = NULL;
+ quirks = aac_get_driver_ident(index)->quirks;
+ if (quirks & AAC_QUIRK_31BIT) {
+ if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(31)))) ||
+ ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(31)))))
+ goto out;
+ } else {
+ if (((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32)))) ||
+ ((retval = pci_set_consistent_dma_mask(aac->pdev, DMA_BIT_MASK(32)))))
+ goto out;
+ }
+ if ((retval = (*(aac_get_driver_ident(index)->init))(aac)))
+ goto out;
+ if (quirks & AAC_QUIRK_31BIT)
+ if ((retval = pci_set_dma_mask(aac->pdev, DMA_BIT_MASK(32))))
+ goto out;
+ if (jafo) {
+ aac->thread = kthread_run(aac_command_thread, aac, "%s",
+ aac->name);
+ if (IS_ERR(aac->thread)) {
+ retval = PTR_ERR(aac->thread);
+ goto out;
+ }
+ }
+ (void)aac_get_adapter_info(aac);
+ if ((quirks & AAC_QUIRK_34SG) && (host->sg_tablesize > 34)) {
+ host->sg_tablesize = 34;
+ host->max_sectors = (host->sg_tablesize * 8) + 112;
+ }
+ if ((quirks & AAC_QUIRK_17SG) && (host->sg_tablesize > 17)) {
+ host->sg_tablesize = 17;
+ host->max_sectors = (host->sg_tablesize * 8) + 112;
+ }
+ aac_get_config_status(aac, 1);
+ aac_get_containers(aac);
+ /*
+ * This is where the assumption that the Adapter is quiesced
+ * is important.
+ */
+ command_list = NULL;
+ __shost_for_each_device(dev, host) {
+ unsigned long flags;
+ spin_lock_irqsave(&dev->list_lock, flags);
+ list_for_each_entry(command, &dev->cmd_list, list)
+ if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
+ command->SCp.buffer = (struct scatterlist *)command_list;
+ command_list = command;
+ }
+ spin_unlock_irqrestore(&dev->list_lock, flags);
+ }
+ while ((command = command_list)) {
+ command_list = (struct scsi_cmnd *)command->SCp.buffer;
+ command->SCp.buffer = NULL;
+ command->result = DID_OK << 16
+ | COMMAND_COMPLETE << 8
+ | SAM_STAT_TASK_SET_FULL;
+ command->SCp.phase = AAC_OWNER_ERROR_HANDLER;
+ command->scsi_done(command);
+ }
+ retval = 0;
+
+out:
+ aac->in_reset = 0;
+ scsi_unblock_requests(host);
+ if (jafo) {
+ spin_lock_irq(host->host_lock);
+ }
+ return retval;
+}
+
+int aac_reset_adapter(struct aac_dev * aac, int forced)
+{
+ unsigned long flagv = 0;
+ int retval;
+ struct Scsi_Host * host;
+
+ if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
+ return -EBUSY;
+
+ if (aac->in_reset) {
+ spin_unlock_irqrestore(&aac->fib_lock, flagv);
+ return -EBUSY;
+ }
+ aac->in_reset = 1;
+ spin_unlock_irqrestore(&aac->fib_lock, flagv);
+
+ /*
+ * Wait for all commands to complete to this specific
+ * target (block maximum 60 seconds). Although not necessary,
+ * it does make us a good storage citizen.
+ */
+ host = aac->scsi_host_ptr;
+ scsi_block_requests(host);
+ if (forced < 2) for (retval = 60; retval; --retval) {
+ struct scsi_device * dev;
+ struct scsi_cmnd * command;
+ int active = 0;
+
+ __shost_for_each_device(dev, host) {
+ spin_lock_irqsave(&dev->list_lock, flagv);
+ list_for_each_entry(command, &dev->cmd_list, list) {
+ if (command->SCp.phase == AAC_OWNER_FIRMWARE) {
+ active++;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&dev->list_lock, flagv);
+ if (active)
+ break;
+
+ }
+ /*
+ * We can exit If all the commands are complete
+ */
+ if (active == 0)
+ break;
+ ssleep(1);
+ }
+
+ /* Quiesce build, flush cache, write through mode */
+ if (forced < 2)
+ aac_send_shutdown(aac);
+ spin_lock_irqsave(host->host_lock, flagv);
+ retval = _aac_reset_adapter(aac, forced ? forced : ((aac_check_reset != 0) && (aac_check_reset != 1)));
+ spin_unlock_irqrestore(host->host_lock, flagv);
+
+ if ((forced < 2) && (retval == -ENODEV)) {
+ /* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */
+ struct fib * fibctx = aac_fib_alloc(aac);
+ if (fibctx) {
+ struct aac_pause *cmd;
+ int status;
+
+ aac_fib_init(fibctx);
+
+ cmd = (struct aac_pause *) fib_data(fibctx);
+
+ cmd->command = cpu_to_le32(VM_ContainerConfig);
+ cmd->type = cpu_to_le32(CT_PAUSE_IO);
+ cmd->timeout = cpu_to_le32(1);
+ cmd->min = cpu_to_le32(1);
+ cmd->noRescan = cpu_to_le32(1);
+ cmd->count = cpu_to_le32(0);
+
+ status = aac_fib_send(ContainerCommand,
+ fibctx,
+ sizeof(struct aac_pause),
+ FsaNormal,
+ -2 /* Timeout silently */, 1,
+ NULL, NULL);
+
+ if (status >= 0)
+ aac_fib_complete(fibctx);
+ /* FIB should be freed only after getting
+ * the response from the F/W */
+ if (status != -ERESTARTSYS)
+ aac_fib_free(fibctx);
+ }
+ }
+
+ return retval;
+}
+
+int aac_check_health(struct aac_dev * aac)
+{
+ int BlinkLED;
+ unsigned long time_now, flagv = 0;
+ struct list_head * entry;
+ struct Scsi_Host * host;
+
+ /* Extending the scope of fib_lock slightly to protect aac->in_reset */
+ if (spin_trylock_irqsave(&aac->fib_lock, flagv) == 0)
+ return 0;
+
+ if (aac->in_reset || !(BlinkLED = aac_adapter_check_health(aac))) {
+ spin_unlock_irqrestore(&aac->fib_lock, flagv);
+ return 0; /* OK */
+ }
+
+ aac->in_reset = 1;
+
+ /* Fake up an AIF:
+ * aac_aifcmd.command = AifCmdEventNotify = 1
+ * aac_aifcmd.seqnum = 0xFFFFFFFF
+ * aac_aifcmd.data[0] = AifEnExpEvent = 23
+ * aac_aifcmd.data[1] = AifExeFirmwarePanic = 3
+ * aac.aifcmd.data[2] = AifHighPriority = 3
+ * aac.aifcmd.data[3] = BlinkLED
+ */
+
+ time_now = jiffies/HZ;
+ entry = aac->fib_list.next;
+
+ /*
+ * For each Context that is on the
+ * fibctxList, make a copy of the
+ * fib, and then set the event to wake up the
+ * thread that is waiting for it.
+ */
+ while (entry != &aac->fib_list) {
+ /*
+ * Extract the fibctx
+ */
+ struct aac_fib_context *fibctx = list_entry(entry, struct aac_fib_context, next);
+ struct hw_fib * hw_fib;
+ struct fib * fib;
+ /*
+ * Check if the queue is getting
+ * backlogged
+ */
+ if (fibctx->count > 20) {
+ /*
+ * It's *not* jiffies folks,
+ * but jiffies / HZ, so do not
+ * panic ...
+ */
+ u32 time_last = fibctx->jiffies;
+ /*
+ * Has it been > 2 minutes
+ * since the last read off
+ * the queue?
+ */
+ if ((time_now - time_last) > aif_timeout) {
+ entry = entry->next;
+ aac_close_fib_context(aac, fibctx);
+ continue;
+ }
+ }
+ /*
+ * Warning: no sleep allowed while
+ * holding spinlock
+ */
+ hw_fib = kzalloc(sizeof(struct hw_fib), GFP_ATOMIC);
+ fib = kzalloc(sizeof(struct fib), GFP_ATOMIC);
+ if (fib && hw_fib) {
+ struct aac_aifcmd * aif;
+
+ fib->hw_fib_va = hw_fib;
+ fib->dev = aac;
+ aac_fib_init(fib);
+ fib->type = FSAFS_NTC_FIB_CONTEXT;
+ fib->size = sizeof (struct fib);
+ fib->data = hw_fib->data;
+ aif = (struct aac_aifcmd *)hw_fib->data;
+ aif->command = cpu_to_le32(AifCmdEventNotify);
+ aif->seqnum = cpu_to_le32(0xFFFFFFFF);
+ ((__le32 *)aif->data)[0] = cpu_to_le32(AifEnExpEvent);
+ ((__le32 *)aif->data)[1] = cpu_to_le32(AifExeFirmwarePanic);
+ ((__le32 *)aif->data)[2] = cpu_to_le32(AifHighPriority);
+ ((__le32 *)aif->data)[3] = cpu_to_le32(BlinkLED);
+
+ /*
+ * Put the FIB onto the
+ * fibctx's fibs
+ */
+ list_add_tail(&fib->fiblink, &fibctx->fib_list);
+ fibctx->count++;
+ /*
+ * Set the event to wake up the
+ * thread that will waiting.
+ */
+ up(&fibctx->wait_sem);
+ } else {
+ printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
+ kfree(fib);
+ kfree(hw_fib);
+ }
+ entry = entry->next;
+ }
+
+ spin_unlock_irqrestore(&aac->fib_lock, flagv);
+
+ if (BlinkLED < 0) {
+ printk(KERN_ERR "%s: Host adapter dead %d\n", aac->name, BlinkLED);
+ goto out;
+ }
+
+ printk(KERN_ERR "%s: Host adapter BLINK LED 0x%x\n", aac->name, BlinkLED);
+
+ if (!aac_check_reset || ((aac_check_reset == 1) &&
+ (aac->supplement_adapter_info.SupportedOptions2 &
+ AAC_OPTION_IGNORE_RESET)))
+ goto out;
+ host = aac->scsi_host_ptr;
+ if (aac->thread->pid != current->pid)
+ spin_lock_irqsave(host->host_lock, flagv);
+ BlinkLED = _aac_reset_adapter(aac, aac_check_reset != 1);
+ if (aac->thread->pid != current->pid)
+ spin_unlock_irqrestore(host->host_lock, flagv);
+ return BlinkLED;
+
+out:
+ aac->in_reset = 0;
+ return BlinkLED;
+}
+
+
+/**
+ * aac_command_thread - command processing thread
+ * @dev: Adapter to monitor
+ *
+ * Waits on the commandready event in it's queue. When the event gets set
+ * it will pull FIBs off it's queue. It will continue to pull FIBs off
+ * until the queue is empty. When the queue is empty it will wait for
+ * more FIBs.
+ */
+
+int aac_command_thread(void *data)
+{
+ struct aac_dev *dev = data;
+ struct hw_fib *hw_fib, *hw_newfib;
+ struct fib *fib, *newfib;
+ struct aac_fib_context *fibctx;
+ unsigned long flags;
+ DECLARE_WAITQUEUE(wait, current);
+ unsigned long next_jiffies = jiffies + HZ;
+ unsigned long next_check_jiffies = next_jiffies;
+ long difference = HZ;
+
+ /*
+ * We can only have one thread per adapter for AIF's.
+ */
+ if (dev->aif_thread)
+ return -EINVAL;
+
+ /*
+ * Let the DPC know it has a place to send the AIF's to.
+ */
+ dev->aif_thread = 1;
+ add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ dprintk ((KERN_INFO "aac_command_thread start\n"));
+ while (1) {
+ spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
+ while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) {
+ struct list_head *entry;
+ struct aac_aifcmd * aifcmd;
+
+ set_current_state(TASK_RUNNING);
+
+ entry = dev->queues->queue[HostNormCmdQueue].cmdq.next;
+ list_del(entry);
+
+ spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
+ fib = list_entry(entry, struct fib, fiblink);
+ /*
+ * We will process the FIB here or pass it to a
+ * worker thread that is TBD. We Really can't
+ * do anything at this point since we don't have
+ * anything defined for this thread to do.
+ */
+ hw_fib = fib->hw_fib_va;
+ memset(fib, 0, sizeof(struct fib));
+ fib->type = FSAFS_NTC_FIB_CONTEXT;
+ fib->size = sizeof(struct fib);
+ fib->hw_fib_va = hw_fib;
+ fib->data = hw_fib->data;
+ fib->dev = dev;
+ /*
+ * We only handle AifRequest fibs from the adapter.
+ */
+ aifcmd = (struct aac_aifcmd *) hw_fib->data;
+ if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
+ /* Handle Driver Notify Events */
+ aac_handle_aif(dev, fib);
+ *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
+ aac_fib_adapter_complete(fib, (u16)sizeof(u32));
+ } else {
+ /* The u32 here is important and intended. We are using
+ 32bit wrapping time to fit the adapter field */
+
+ u32 time_now, time_last;
+ unsigned long flagv;
+ unsigned num;
+ struct hw_fib ** hw_fib_pool, ** hw_fib_p;
+ struct fib ** fib_pool, ** fib_p;
+
+ /* Sniff events */
+ if ((aifcmd->command ==
+ cpu_to_le32(AifCmdEventNotify)) ||
+ (aifcmd->command ==
+ cpu_to_le32(AifCmdJobProgress))) {
+ aac_handle_aif(dev, fib);
+ }
+
+ time_now = jiffies/HZ;
+
+ /*
+ * Warning: no sleep allowed while
+ * holding spinlock. We take the estimate
+ * and pre-allocate a set of fibs outside the
+ * lock.
+ */
+ num = le32_to_cpu(dev->init->AdapterFibsSize)
+ / sizeof(struct hw_fib); /* some extra */
+ spin_lock_irqsave(&dev->fib_lock, flagv);
+ entry = dev->fib_list.next;
+ while (entry != &dev->fib_list) {
+ entry = entry->next;
+ ++num;
+ }
+ spin_unlock_irqrestore(&dev->fib_lock, flagv);
+ hw_fib_pool = NULL;
+ fib_pool = NULL;
+ if (num
+ && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL)))
+ && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) {
+ hw_fib_p = hw_fib_pool;
+ fib_p = fib_pool;
+ while (hw_fib_p < &hw_fib_pool[num]) {
+ if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) {
+ --hw_fib_p;
+ break;
+ }
+ if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) {
+ kfree(*(--hw_fib_p));
+ break;
+ }
+ }
+ if ((num = hw_fib_p - hw_fib_pool) == 0) {
+ kfree(fib_pool);
+ fib_pool = NULL;
+ kfree(hw_fib_pool);
+ hw_fib_pool = NULL;
+ }
+ } else {
+ kfree(hw_fib_pool);
+ hw_fib_pool = NULL;
+ }
+ spin_lock_irqsave(&dev->fib_lock, flagv);
+ entry = dev->fib_list.next;
+ /*
+ * For each Context that is on the
+ * fibctxList, make a copy of the
+ * fib, and then set the event to wake up the
+ * thread that is waiting for it.
+ */
+ hw_fib_p = hw_fib_pool;
+ fib_p = fib_pool;
+ while (entry != &dev->fib_list) {
+ /*
+ * Extract the fibctx
+ */
+ fibctx = list_entry(entry, struct aac_fib_context, next);
+ /*
+ * Check if the queue is getting
+ * backlogged
+ */
+ if (fibctx->count > 20)
+ {
+ /*
+ * It's *not* jiffies folks,
+ * but jiffies / HZ so do not
+ * panic ...
+ */
+ time_last = fibctx->jiffies;
+ /*
+ * Has it been > 2 minutes
+ * since the last read off
+ * the queue?
+ */
+ if ((time_now - time_last) > aif_timeout) {
+ entry = entry->next;
+ aac_close_fib_context(dev, fibctx);
+ continue;
+ }
+ }
+ /*
+ * Warning: no sleep allowed while
+ * holding spinlock
+ */
+ if (hw_fib_p < &hw_fib_pool[num]) {
+ hw_newfib = *hw_fib_p;
+ *(hw_fib_p++) = NULL;
+ newfib = *fib_p;
+ *(fib_p++) = NULL;
+ /*
+ * Make the copy of the FIB
+ */
+ memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
+ memcpy(newfib, fib, sizeof(struct fib));
+ newfib->hw_fib_va = hw_newfib;
+ /*
+ * Put the FIB onto the
+ * fibctx's fibs
+ */
+ list_add_tail(&newfib->fiblink, &fibctx->fib_list);
+ fibctx->count++;
+ /*
+ * Set the event to wake up the
+ * thread that is waiting.
+ */
+ up(&fibctx->wait_sem);
+ } else {
+ printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
+ }
+ entry = entry->next;
+ }
+ /*
+ * Set the status of this FIB
+ */
+ *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
+ aac_fib_adapter_complete(fib, sizeof(u32));
+ spin_unlock_irqrestore(&dev->fib_lock, flagv);
+ /* Free up the remaining resources */
+ hw_fib_p = hw_fib_pool;
+ fib_p = fib_pool;
+ while (hw_fib_p < &hw_fib_pool[num]) {
+ kfree(*hw_fib_p);
+ kfree(*fib_p);
+ ++fib_p;
+ ++hw_fib_p;
+ }
+ kfree(hw_fib_pool);
+ kfree(fib_pool);
+ }
+ kfree(fib);
+ spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags);
+ }
+ /*
+ * There are no more AIF's
+ */
+ spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags);
+
+ /*
+ * Background activity
+ */
+ if ((time_before(next_check_jiffies,next_jiffies))
+ && ((difference = next_check_jiffies - jiffies) <= 0)) {
+ next_check_jiffies = next_jiffies;
+ if (aac_check_health(dev) == 0) {
+ difference = ((long)(unsigned)check_interval)
+ * HZ;
+ next_check_jiffies = jiffies + difference;
+ } else if (!dev->queues)
+ break;
+ }
+ if (!time_before(next_check_jiffies,next_jiffies)
+ && ((difference = next_jiffies - jiffies) <= 0)) {
+ struct timeval now;
+ int ret;
+
+ /* Don't even try to talk to adapter if its sick */
+ ret = aac_check_health(dev);
+ if (!ret && !dev->queues)
+ break;
+ next_check_jiffies = jiffies
+ + ((long)(unsigned)check_interval)
+ * HZ;
+ do_gettimeofday(&now);
+
+ /* Synchronize our watches */
+ if (((1000000 - (1000000 / HZ)) > now.tv_usec)
+ && (now.tv_usec > (1000000 / HZ)))
+ difference = (((1000000 - now.tv_usec) * HZ)
+ + 500000) / 1000000;
+ else if (ret == 0) {
+ struct fib *fibptr;
+
+ if ((fibptr = aac_fib_alloc(dev))) {
+ int status;
+ __le32 *info;
+
+ aac_fib_init(fibptr);
+
+ info = (__le32 *) fib_data(fibptr);
+ if (now.tv_usec > 500000)
+ ++now.tv_sec;
+
+ *info = cpu_to_le32(now.tv_sec);
+
+ status = aac_fib_send(SendHostTime,
+ fibptr,
+ sizeof(*info),
+ FsaNormal,
+ 1, 1,
+ NULL,
+ NULL);
+ /* Do not set XferState to zero unless
+ * receives a response from F/W */
+ if (status >= 0)
+ aac_fib_complete(fibptr);
+ /* FIB should be freed only after
+ * getting the response from the F/W */
+ if (status != -ERESTARTSYS)
+ aac_fib_free(fibptr);
+ }
+ difference = (long)(unsigned)update_interval*HZ;
+ } else {
+ /* retry shortly */
+ difference = 10 * HZ;
+ }
+ next_jiffies = jiffies + difference;
+ if (time_before(next_check_jiffies,next_jiffies))
+ difference = next_check_jiffies - jiffies;
+ }
+ if (difference <= 0)
+ difference = 1;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(difference);
+
+ if (kthread_should_stop())
+ break;
+ }
+ if (dev->queues)
+ remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait);
+ dev->aif_thread = 0;
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff