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/*
* Adaptec AAC series RAID controller driver
* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
*
* based on the old aacraid driver that is..
* Adaptec aacraid device driver for Linux.
*
* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Module Name:
* comminit.c
*
* Abstract: This supports the initialization of the host adapter commuication interface.
* This is a platform dependent module for the pci cyclone board.
*
*/
#include <linux/config.h>
#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/blk.h>
#include <asm/semaphore.h>
#include "scsi.h"
#include "hosts.h"
#include "aacraid.h"
struct aac_common aac_config;
static struct aac_dev *devices;
static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
{
unsigned char *base;
unsigned long size, align;
unsigned long fibsize = 4096;
unsigned long printfbufsiz = 256;
struct aac_init *init;
dma_addr_t phys;
size = fibsize + sizeof(struct aac_init) + commsize + commalign + printfbufsiz;
base = pci_alloc_consistent(dev->pdev, size, &phys);
if(base == NULL)
{
printk(KERN_ERR "aacraid: unable to create mapping.\n");
return 0;
}
dev->comm_addr = (void *)base;
dev->comm_phys = phys;
dev->comm_size = size;
dev->init = (struct aac_init *)(base + fibsize);
dev->init_pa = (struct aac_init *)(phys + fibsize);
init = dev->init;
init->InitStructRevision = cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
init->MiniPortRevision = cpu_to_le32(Sa_MINIPORT_REVISION);
init->fsrev = cpu_to_le32(dev->fsrev);
/*
* Adapter Fibs are the first thing allocated so that they
* start page aligned
*/
init->AdapterFibsVirtualAddress = cpu_to_le32(base);
init->AdapterFibsPhysicalAddress = cpu_to_le32(phys);
init->AdapterFibsSize = cpu_to_le32(fibsize);
init->AdapterFibAlign = cpu_to_le32(sizeof(struct hw_fib));
/*
* Increment the base address by the amount already used
*/
base = base + fibsize + sizeof(struct aac_init);
phys = phys + fibsize + sizeof(struct aac_init);
/*
* Align the beginning of Headers to commalign
*/
align = (commalign - ((unsigned long)(base) & (commalign - 1)));
base = base + align;
phys = phys + align;
/*
* Fill in addresses of the Comm Area Headers and Queues
*/
*commaddr = (unsigned long *)base;
init->CommHeaderAddress = cpu_to_le32(phys);
/*
* Increment the base address by the size of the CommArea
*/
base = base + commsize;
phys = phys + commsize;
/*
* Place the Printf buffer area after the Fast I/O comm area.
*/
dev->printfbuf = (void *)base;
init->printfbuf = cpu_to_le32(phys);
init->printfbufsiz = cpu_to_le32(printfbufsiz);
memset(base, 0, printfbufsiz);
return 1;
}
static void aac_queue_init(struct aac_dev * dev, struct aac_queue * q, u32 *mem, int qsize)
{
q->numpending = 0;
q->dev = dev;
INIT_LIST_HEAD(&q->pendingq);
init_waitqueue_head(&q->cmdready);
INIT_LIST_HEAD(&q->cmdq);
init_waitqueue_head(&q->qfull);
spin_lock_init(&q->lockdata);
q->lock = &q->lockdata;
q->headers.producer = mem;
q->headers.consumer = mem+1;
*q->headers.producer = cpu_to_le32(qsize);
*q->headers.consumer = cpu_to_le32(qsize);
q->entries = qsize;
}
/**
* aac_send_shutdown - shutdown an adapter
* @dev: Adapter to shutdown
*
* This routine will send a VM_CloseAll (shutdown) request to the adapter.
*/
static int aac_send_shutdown(struct aac_dev * dev)
{
struct fib * fibctx;
struct aac_close *cmd;
int status;
fibctx = fib_alloc(dev);
fib_init(fibctx);
cmd = (struct aac_close *) fib_data(fibctx);
cmd->command = cpu_to_le32(VM_CloseAll);
cmd->cid = cpu_to_le32(0xffffffff);
status = fib_send(ContainerCommand,
fibctx,
sizeof(struct aac_close),
FsaNormal,
1, 1,
NULL, NULL);
if (status == 0)
fib_complete(fibctx);
fib_free(fibctx);
return status;
}
/**
* aac_detach - detach adapter
* @detach: adapter to disconnect
*
* Disconnect and shutdown an AAC based adapter, freeing resources
* as we go.
*/
int aac_detach(struct aac_dev *detach)
{
struct aac_dev **dev = &devices;
while(*dev)
{
if(*dev == detach)
{
*dev = detach->next;
aac_send_shutdown(detach);
fib_map_free(detach);
pci_free_consistent(detach->pdev, detach->comm_size, detach->comm_addr, detach->comm_phys);
kfree(detach->queues);
return 1;
}
dev=&((*dev)->next);
}
BUG();
return 0;
}
/**
* aac_comm_init - Initialise FSA data structures
* @dev: Adapter to intialise
*
* Initializes the data structures that are required for the FSA commuication
* interface to operate.
* Returns
* 1 - if we were able to init the commuication interface.
* 0 - If there were errors initing. This is a fatal error.
*/
int aac_comm_init(struct aac_dev * dev)
{
unsigned long hdrsize = (sizeof(u32) * NUMBER_OF_COMM_QUEUES) * 2;
unsigned long queuesize = sizeof(struct aac_entry) * TOTAL_QUEUE_ENTRIES;
u32 *headers;
struct aac_entry * queues;
unsigned long size;
struct aac_queue_block * comm = dev->queues;
/*
* Now allocate and initialize the zone structures used as our
* pool of FIB context records. The size of the zone is based
* on the system memory size. We also initialize the mutex used
* to protect the zone.
*/
spin_lock_init(&dev->fib_lock);
/*
* Allocate the physically contigous space for the commuication
* queue headers.
*/
size = hdrsize + queuesize;
if (!aac_alloc_comm(dev, (void * *)&headers, size, QUEUE_ALIGNMENT))
return -ENOMEM;
queues = (struct aac_entry *)((unsigned char *)headers + hdrsize);
/* Adapter to Host normal priority Command queue */
comm->queue[HostNormCmdQueue].base = queues;
aac_queue_init(dev, &comm->queue[HostNormCmdQueue], headers, HOST_NORM_CMD_ENTRIES);
queues += HOST_NORM_CMD_ENTRIES;
headers += 2;
/* Adapter to Host high priority command queue */
comm->queue[HostHighCmdQueue].base = queues;
aac_queue_init(dev, &comm->queue[HostHighCmdQueue], headers, HOST_HIGH_CMD_ENTRIES);
queues += HOST_HIGH_CMD_ENTRIES;
headers +=2;
/* Host to adapter normal priority command queue */
comm->queue[AdapNormCmdQueue].base = queues;
aac_queue_init(dev, &comm->queue[AdapNormCmdQueue], headers, ADAP_NORM_CMD_ENTRIES);
queues += ADAP_NORM_CMD_ENTRIES;
headers += 2;
/* host to adapter high priority command queue */
comm->queue[AdapHighCmdQueue].base = queues;
aac_queue_init(dev, &comm->queue[AdapHighCmdQueue], headers, ADAP_HIGH_CMD_ENTRIES);
queues += ADAP_HIGH_CMD_ENTRIES;
headers += 2;
/* adapter to host normal priority response queue */
comm->queue[HostNormRespQueue].base = queues;
aac_queue_init(dev, &comm->queue[HostNormRespQueue], headers, HOST_NORM_RESP_ENTRIES);
queues += HOST_NORM_RESP_ENTRIES;
headers += 2;
/* adapter to host high priority response queue */
comm->queue[HostHighRespQueue].base = queues;
aac_queue_init(dev, &comm->queue[HostHighRespQueue], headers, HOST_HIGH_RESP_ENTRIES);
queues += HOST_HIGH_RESP_ENTRIES;
headers += 2;
/* host to adapter normal priority response queue */
comm->queue[AdapNormRespQueue].base = queues;
aac_queue_init(dev, &comm->queue[AdapNormRespQueue], headers, ADAP_NORM_RESP_ENTRIES);
queues += ADAP_NORM_RESP_ENTRIES;
headers += 2;
/* host to adapter high priority response queue */
comm->queue[AdapHighRespQueue].base = queues;
aac_queue_init(dev, &comm->queue[AdapHighRespQueue], headers, ADAP_HIGH_RESP_ENTRIES);
comm->queue[AdapNormCmdQueue].lock = comm->queue[HostNormRespQueue].lock;
comm->queue[AdapHighCmdQueue].lock = comm->queue[HostHighRespQueue].lock;
comm->queue[AdapNormRespQueue].lock = comm->queue[HostNormCmdQueue].lock;
comm->queue[AdapHighRespQueue].lock = comm->queue[HostHighCmdQueue].lock;
return 0;
}
struct aac_dev *aac_init_adapter(struct aac_dev *dev)
{
/*
* Ok now init the communication subsystem
*/
dev->queues = (struct aac_queue_block *) kmalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
if (dev->queues == NULL) {
printk(KERN_ERR "Error could not allocate comm region.\n");
return NULL;
}
memset(dev->queues, 0, sizeof(struct aac_queue_block));
if (aac_comm_init(dev)<0)
return NULL;
/*
* Initialize the list of fibs
*/
if(fib_setup(dev)<0)
return NULL;
INIT_LIST_HEAD(&dev->fib_list);
spin_lock_init(&dev->fib_lock);
init_completion(&dev->aif_completion);
/*
* Add this adapter in to our dev List.
*/
dev->next = devices;
devices = dev;
return dev;
}
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