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commsup.c
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commsup.c
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// 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:
* commsup.c
*
* Abstract: Contain all routines that are required for FSA host/adapter
* communication.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/crash_dump.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/bcd.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)
{
if (dev->max_fib_size > AAC_MAX_NATIVE_SIZE)
dev->max_cmd_size = AAC_MAX_NATIVE_SIZE;
else
dev->max_cmd_size = dev->max_fib_size;
if (dev->max_fib_size < AAC_MAX_NATIVE_SIZE) {
dev->max_cmd_size = AAC_MAX_NATIVE_SIZE;
} else {
dev->max_cmd_size = dev->max_fib_size;
}
dprintk((KERN_INFO
"allocate hardware fibs dma_alloc_coherent(%p, %d * (%d + %d), %p)\n",
&dev->pdev->dev, dev->max_cmd_size, dev->scsi_host_ptr->can_queue,
AAC_NUM_MGT_FIB, &dev->hw_fib_pa));
dev->hw_fib_va = dma_alloc_coherent(&dev->pdev->dev,
(dev->max_cmd_size + sizeof(struct aac_fib_xporthdr))
* (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) + (ALIGN32 - 1),
&dev->hw_fib_pa, GFP_KERNEL);
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)
{
size_t alloc_size;
size_t fib_size;
int num_fibs;
if(!dev->hw_fib_va || !dev->max_cmd_size)
return;
num_fibs = dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB;
fib_size = dev->max_fib_size + sizeof(struct aac_fib_xporthdr);
alloc_size = fib_size * num_fibs + ALIGN32 - 1;
dma_free_coherent(&dev->pdev->dev, alloc_size, dev->hw_fib_va,
dev->hw_fib_pa);
dev->hw_fib_va = NULL;
dev->hw_fib_pa = 0;
}
void aac_fib_vector_assign(struct aac_dev *dev)
{
u32 i = 0;
u32 vector = 1;
struct fib *fibptr = NULL;
for (i = 0, fibptr = &dev->fibs[i];
i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
i++, fibptr++) {
if ((dev->max_msix == 1) ||
(i > ((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1)
- dev->vector_cap))) {
fibptr->vector_no = 0;
} else {
fibptr->vector_no = vector;
vector++;
if (vector == dev->max_msix)
vector = 1;
}
}
}
/**
* 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;
u32 max_cmds;
while (((i = fib_map_alloc(dev)) == -ENOMEM)
&& (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) {
max_cmds = (dev->scsi_host_ptr->can_queue+AAC_NUM_MGT_FIB) >> 1;
dev->scsi_host_ptr->can_queue = max_cmds - AAC_NUM_MGT_FIB;
if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3)
dev->init->r7.max_io_commands = cpu_to_le32(max_cmds);
}
if (i<0)
return -ENOMEM;
memset(dev->hw_fib_va, 0,
(dev->max_cmd_size + sizeof(struct aac_fib_xporthdr)) *
(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB));
/* 32 byte alignment for PMC */
hw_fib_pa = (dev->hw_fib_pa + (ALIGN32 - 1)) & ~(ALIGN32 - 1);
hw_fib = (struct hw_fib *)((unsigned char *)dev->hw_fib_va +
(hw_fib_pa - dev->hw_fib_pa));
/* add Xport header */
hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
sizeof(struct aac_fib_xporthdr));
hw_fib_pa += sizeof(struct aac_fib_xporthdr);
/*
* 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->size = sizeof(struct fib);
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 */
init_completion(&fibptr->event_wait);
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); /* ?? max_cmd_size */
fibptr->hw_fib_pa = hw_fib_pa;
fibptr->hw_sgl_pa = hw_fib_pa +
offsetof(struct aac_hba_cmd_req, sge[2]);
/*
* one element is for the ptr to the separate sg list,
* second element for 32 byte alignment
*/
fibptr->hw_error_pa = hw_fib_pa +
offsetof(struct aac_native_hba, resp.resp_bytes[0]);
hw_fib = (struct hw_fib *)((unsigned char *)hw_fib +
dev->max_cmd_size + sizeof(struct aac_fib_xporthdr));
hw_fib_pa = hw_fib_pa +
dev->max_cmd_size + sizeof(struct aac_fib_xporthdr);
}
/*
*Assign vector numbers to fibs
*/
aac_fib_vector_assign(dev);
/*
* Add the fib chain to the free list
*/
dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL;
/*
* Set 8 fibs aside for management tools
*/
dev->free_fib = &dev->fibs[dev->scsi_host_ptr->can_queue];
return 0;
}
/**
* aac_fib_alloc_tag-allocate a fib using tags
* @dev: Adapter to allocate the fib for
* @scmd: SCSI command
*
* Allocate a fib from the adapter fib pool using tags
* from the blk layer.
*/
struct fib *aac_fib_alloc_tag(struct aac_dev *dev, struct scsi_cmnd *scmd)
{
struct fib *fibptr;
u32 blk_tag;
int i;
blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
i = blk_mq_unique_tag_to_tag(blk_tag);
fibptr = &dev->fibs[i];
/*
* Null out fields that depend on being zero at the start of
* each I/O
*/
fibptr->hw_fib_va->header.XferState = 0;
fibptr->type = FSAFS_NTC_FIB_CONTEXT;
fibptr->callback_data = NULL;
fibptr->callback = NULL;
fibptr->flags = 0;
return fibptr;
}
/**
* 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->flags & FIB_CONTEXT_FLAG_NATIVE_HBA) &&
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_dealloc - 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
* @qid: Queue number
* @hw_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;
if (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed))
return -EINVAL;
/*
* 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 requested 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);
/* use the same shifted value for handle to be compatible
* with the new native hba command handle
*/
hw_fib->header.Handle =
cpu_to_le32((((u32)(fibptr - dev->fibs)) << 2) + 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 (wait_for_completion_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 (!try_wait_for_completion(&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 (unlikely(aac_pci_offline(dev)))
return -EFAULT;
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;
}
/*
* Allow other processes / CPUS to use core
*/
schedule();
}
} else if (wait_for_completion_interruptible(&fibptr->event_wait)) {
/* Do nothing ... satisfy
* wait_for_completion_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;
}
int aac_hba_send(u8 command, struct fib *fibptr, fib_callback callback,
void *callback_data)
{
struct aac_dev *dev = fibptr->dev;
int wait;
unsigned long flags = 0;
unsigned long mflags = 0;
struct aac_hba_cmd_req *hbacmd = (struct aac_hba_cmd_req *)
fibptr->hw_fib_va;
fibptr->flags = (FIB_CONTEXT_FLAG | FIB_CONTEXT_FLAG_NATIVE_HBA);
if (callback) {
wait = 0;
fibptr->callback = callback;
fibptr->callback_data = callback_data;
} else
wait = 1;
hbacmd->iu_type = command;
if (command == HBA_IU_TYPE_SCSI_CMD_REQ) {
/* bit1 of request_id must be 0 */
hbacmd->request_id =
cpu_to_le32((((u32)(fibptr - dev->fibs)) << 2) + 1);
fibptr->flags |= FIB_CONTEXT_FLAG_SCSI_CMD;
} else
return -EINVAL;
if (wait) {
spin_lock_irqsave(&dev->manage_lock, mflags);
if (dev->management_fib_count >= AAC_NUM_MGT_FIB) {
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 (aac_adapter_deliver(fibptr) != 0) {
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;
}
FIB_COUNTER_INCREMENT(aac_config.NativeSent);
if (wait) {
spin_unlock_irqrestore(&fibptr->event_lock, flags);
if (unlikely(aac_pci_offline(dev)))
return -EFAULT;
fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
if (wait_for_completion_interruptible(&fibptr->event_wait))
fibptr->done = 2;
fibptr->flags &= ~(FIB_CONTEXT_FLAG_WAIT);
spin_lock_irqsave(&fibptr->event_lock, flags);
if ((fibptr->done == 0) || (fibptr->done == 2)) {
fibptr->done = 2; /* Tell interrupt we aborted */
spin_unlock_irqrestore(&fibptr->event_lock, flags);
return -ERESTARTSYS;
}
spin_unlock_irqrestore(&fibptr->event_lock, flags);
WARN_ON(fibptr->done == 0);
if (unlikely(fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT))
return -ETIMEDOUT;
return 0;
}
return -EINPROGRESS;
}
/**
* 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 ||
dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
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
* @fibptr: 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;
if (fibptr->flags & FIB_CONTEXT_FLAG_NATIVE_HBA) {
fib_dealloc(fibptr);
return 0;
}
/*
* Check for a fib which has already been completed or with a
* status wait timeout
*/
if (hw_fib->header.XferState == 0 || fibptr->done == 2)
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