drivers/scsi/aacraid/comminit.c - third_party/linux - Git at Google

 /*
  *	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)
  *
  * 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/kernel.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <linux/completion.h>
 #include <linux/mm.h>
 #include <scsi/scsi_host.h>

 #include "aacraid.h"

 struct aac_common aac_config = {
 	.irq_mod = 1
 };

 static inline int aac_is_msix_mode(struct aac_dev *dev)
 {
 	u32 status = 0;

 	if (dev->pdev->device == PMC_DEVICE_S6 ||
 		dev->pdev->device == PMC_DEVICE_S7 ||
 		dev->pdev->device == PMC_DEVICE_S8) {
 		status = src_readl(dev, MUnit.OMR);
 	}
 	return (status & AAC_INT_MODE_MSIX);
 }

 static inline void aac_change_to_intx(struct aac_dev *dev)
 {
 	aac_src_access_devreg(dev, AAC_DISABLE_MSIX);
 	aac_src_access_devreg(dev, AAC_ENABLE_INTX);
 }

 static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long commsize, unsigned long commalign)
 {
 	unsigned char *base;
 	unsigned long size, align;
 	const unsigned long fibsize = dev->max_fib_size;
 	const unsigned long printfbufsiz = 256;
 	unsigned long host_rrq_size, aac_init_size;
 	union aac_init *init;
 	dma_addr_t phys;
 	unsigned long aac_max_hostphysmempages;

 	if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) ||
 		(dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) ||
 		(dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
 		!dev->sa_firmware)) {
 		host_rrq_size =
 			(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)
 				* sizeof(u32);
 		aac_init_size = sizeof(union aac_init);
 	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
 		dev->sa_firmware) {
 		host_rrq_size = (dev->scsi_host_ptr->can_queue
 			+ AAC_NUM_MGT_FIB) * sizeof(u32)  * AAC_MAX_MSIX;
 		aac_init_size = sizeof(union aac_init) +
 			(AAC_MAX_HRRQ - 1) * sizeof(struct _rrq);
 	} else {
 		host_rrq_size = 0;
 		aac_init_size = sizeof(union aac_init);
 	}
 	size = fibsize + aac_init_size + commsize + commalign +
 			printfbufsiz + host_rrq_size;

 	base = dma_alloc_coherent(&dev->pdev->dev, size, &phys, GFP_KERNEL);
 	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;

 	if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) ||
 	    (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) ||
 	    (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)) {
 		dev->host_rrq = (u32 *)(base + fibsize);
 		dev->host_rrq_pa = phys + fibsize;
 		memset(dev->host_rrq, 0, host_rrq_size);
 	}

 	dev->init = (union aac_init *)(base + fibsize + host_rrq_size);
 	dev->init_pa = phys + fibsize + host_rrq_size;

 	init = dev->init;

 	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
 		int i;
 		u64 addr;

 		init->r8.init_struct_revision =
 			cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_8);
 		init->r8.init_flags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 					INITFLAGS_DRIVER_USES_UTC_TIME |
 					INITFLAGS_DRIVER_SUPPORTS_PM);
 		init->r8.init_flags |=
 				cpu_to_le32(INITFLAGS_DRIVER_SUPPORTS_HBA_MODE);
 		init->r8.rr_queue_count = cpu_to_le32(dev->max_msix);
 		init->r8.max_io_size =
 			cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 		init->r8.max_num_aif = init->r8.reserved1 =
 			init->r8.reserved2 = 0;

 		for (i = 0; i < dev->max_msix; i++) {
 			addr = (u64)dev->host_rrq_pa + dev->vector_cap * i *
 					sizeof(u32);
 			init->r8.rrq[i].host_addr_high = cpu_to_le32(
 						upper_32_bits(addr));
 			init->r8.rrq[i].host_addr_low = cpu_to_le32(
 						lower_32_bits(addr));
 			init->r8.rrq[i].msix_id = i;
 			init->r8.rrq[i].element_count = cpu_to_le16(
 					(u16)dev->vector_cap);
 			init->r8.rrq[i].comp_thresh =
 					init->r8.rrq[i].unused = 0;
 		}

 		pr_warn("aacraid: Comm Interface type3 enabled\n");
 	} else {
 		init->r7.init_struct_revision =
 			cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
 		if (dev->max_fib_size != sizeof(struct hw_fib))
 			init->r7.init_struct_revision =
 				cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
 		init->r7.no_of_msix_vectors = cpu_to_le32(SA_MINIPORT_REVISION);
 		init->r7.fsrev = cpu_to_le32(dev->fsrev);

 		/*
 		 *	Adapter Fibs are the first thing allocated so that they
 		 *	start page aligned
 		 */
 		dev->aif_base_va = (struct hw_fib *)base;

 		init->r7.adapter_fibs_virtual_address = 0;
 		init->r7.adapter_fibs_physical_address = cpu_to_le32((u32)phys);
 		init->r7.adapter_fibs_size = cpu_to_le32(fibsize);
 		init->r7.adapter_fib_align = cpu_to_le32(sizeof(struct hw_fib));

 		/*
 		 * number of 4k pages of host physical memory. The aacraid fw
 		 * needs this number to be less than 4gb worth of pages. New
 		 * firmware doesn't have any issues with the mapping system, but
 		 * older Firmware did, and had *troubles* dealing with the math
 		 * overloading past 32 bits, thus we must limit this field.
 		 */
 		aac_max_hostphysmempages =
 				dma_get_required_mask(&dev->pdev->dev) >> 12;
 		if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
 			init->r7.host_phys_mem_pages =
 					cpu_to_le32(aac_max_hostphysmempages);
 		else
 			init->r7.host_phys_mem_pages =
 					cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);

 		init->r7.init_flags =
 			cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
 			INITFLAGS_DRIVER_SUPPORTS_PM);
 		init->r7.max_io_commands =
 			cpu_to_le32(dev->scsi_host_ptr->can_queue +
 					AAC_NUM_MGT_FIB);
 		init->r7.max_io_size =
 			cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
 		init->r7.max_fib_size = cpu_to_le32(dev->max_fib_size);
 		init->r7.max_num_aif = cpu_to_le32(dev->max_num_aif);

 		if (dev->comm_interface == AAC_COMM_MESSAGE) {
 			init->r7.init_flags |=
 				cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
 			pr_warn("aacraid: Comm Interface enabled\n");
 		} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
 			init->r7.init_struct_revision =
 				cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
 			init->r7.init_flags |=
 				cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 				INITFLAGS_NEW_COMM_TYPE1_SUPPORTED |
 				INITFLAGS_FAST_JBOD_SUPPORTED);
 			init->r7.host_rrq_addr_high =
 				cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
 			init->r7.host_rrq_addr_low =
 				cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
 			pr_warn("aacraid: Comm Interface type1 enabled\n");
 		} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
 			init->r7.init_struct_revision =
 				cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
 			init->r7.init_flags |=
 				cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED |
 				INITFLAGS_NEW_COMM_TYPE2_SUPPORTED |
 				INITFLAGS_FAST_JBOD_SUPPORTED);
 			init->r7.host_rrq_addr_high =
 				cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
 			init->r7.host_rrq_addr_low =
 				cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
 			init->r7.no_of_msix_vectors =
 				cpu_to_le32(dev->max_msix);
 			/* must be the COMM_PREFERRED_SETTINGS values */
 			pr_warn("aacraid: Comm Interface type2 enabled\n");
 		}
 	}

 	/*
 	 * Increment the base address by the amount already used
 	 */
 	base = base + fibsize + host_rrq_size + aac_init_size;
 	phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
 			aac_init_size);

 	/*
 	 *	Align the beginning of Headers to commalign
 	 */
 	align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
 	base = base + align;
 	phys = phys + align;
 	/*
 	 *	Fill in addresses of the Comm Area Headers and Queues
 	 */
 	*commaddr = base;
 	if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3)
 		init->r7.comm_header_address = cpu_to_le32((u32)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;
 	if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3) {
 		init->r7.printfbuf = cpu_to_le32(phys);
 		init->r7.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)
 {
 	atomic_set(&q->numpending, 0);
 	q->dev = dev;
 	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 = (__le32 *)mem;
 	q->headers.consumer = (__le32 *)(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.
  */

 int aac_send_shutdown(struct aac_dev * dev)
 {
 	struct fib * fibctx;
 	struct aac_close *cmd;
 	int status;

 	fibctx = aac_fib_alloc(dev);
 	if (!fibctx)
 		return -ENOMEM;
 	aac_fib_init(fibctx);

 	mutex_lock(&dev->ioctl_mutex);
 	dev->adapter_shutdown = 1;
 	mutex_unlock(&dev->ioctl_mutex);

 	cmd = (struct aac_close *) fib_data(fibctx);
 	cmd->command = cpu_to_le32(VM_CloseAll);
 	cmd->cid = cpu_to_le32(0xfffffffe);

 	status = aac_fib_send(ContainerCommand,
 			  fibctx,
 			  sizeof(struct aac_close),
 			  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);
 	if ((dev->pdev->device == PMC_DEVICE_S7 ||
 	     dev->pdev->device == PMC_DEVICE_S8 ||
 	     dev->pdev->device == PMC_DEVICE_S9) &&
 	     dev->msi_enabled)
 		aac_set_intx_mode(dev);
 	return status;
 }

 /**
  *	aac_comm_init	-	Initialise FSA data structures
  *	@dev:	Adapter to initialise
  *
  *	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.
  */

 static 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 contiguous 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 *)(((ulong)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;
 }

 void aac_define_int_mode(struct aac_dev *dev)
 {
 	int i, msi_count, min_msix;

 	msi_count = i = 0;
 	/* max. vectors from GET_COMM_PREFERRED_SETTINGS */
 	if (dev->max_msix == 0 ||
 	    dev->pdev->device == PMC_DEVICE_S6 ||
 	    dev->sync_mode) {
 		dev->max_msix = 1;
 		dev->vector_cap =
 			dev->scsi_host_ptr->can_queue +
 			AAC_NUM_MGT_FIB;
 		return;
 	}

 	/* Don't bother allocating more MSI-X vectors than cpus */
 	msi_count = min(dev->max_msix,
 		(unsigned int)num_online_cpus());

 	dev->max_msix = msi_count;

 	if (msi_count > AAC_MAX_MSIX)
 		msi_count = AAC_MAX_MSIX;

 	if (msi_count > 1 &&
 	    pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
 		min_msix = 2;
 		i = pci_alloc_irq_vectors(dev->pdev,
 					  min_msix, msi_count,
 					  PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
 		if (i > 0) {
 			dev->msi_enabled = 1;
 			msi_count = i;
 		} else {
 			dev->msi_enabled = 0;
 			dev_err(&dev->pdev->dev,
 			"MSIX not supported!! Will try INTX 0x%x.\n", i);
 		}
 	}

 	if (!dev->msi_enabled)
 		dev->max_msix = msi_count = 1;
 	else {
 		if (dev->max_msix > msi_count)
 			dev->max_msix = msi_count;
 	}
 	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 && dev->sa_firmware)
 		dev->vector_cap = dev->scsi_host_ptr->can_queue +
 				AAC_NUM_MGT_FIB;
 	else
 		dev->vector_cap = (dev->scsi_host_ptr->can_queue +
 				AAC_NUM_MGT_FIB) / msi_count;

 }
 struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 {
 	u32 status[5];
 	struct Scsi_Host * host = dev->scsi_host_ptr;
 	extern int aac_sync_mode;

 	/*
 	 *	Check the preferred comm settings, defaults from template.
 	 */
 	dev->management_fib_count = 0;
 	spin_lock_init(&dev->manage_lock);
 	spin_lock_init(&dev->sync_lock);
 	spin_lock_init(&dev->iq_lock);
 	dev->max_fib_size = sizeof(struct hw_fib);
 	dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
 		- sizeof(struct aac_fibhdr)
 		- sizeof(struct aac_write) + sizeof(struct sgentry))
 			/ sizeof(struct sgentry);
 	dev->comm_interface = AAC_COMM_PRODUCER;
 	dev->raw_io_interface = dev->raw_io_64 = 0;


 	/*
 	 * Enable INTX mode, if not done already Enabled
 	 */
 	if (aac_is_msix_mode(dev)) {
 		aac_change_to_intx(dev);
 		dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
 	}

 	if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
 		0, 0, 0, 0, 0, 0,
 		status+0, status+1, status+2, status+3, status+4)) &&
 		(status[0] == 0x00000001)) {
 		dev->doorbell_mask = status[3];
 		if (status[1] & AAC_OPT_NEW_COMM_64)
 			dev->raw_io_64 = 1;
 		dev->sync_mode = aac_sync_mode;
 		if (dev->a_ops.adapter_comm &&
 			(status[1] & AAC_OPT_NEW_COMM)) {
 				dev->comm_interface = AAC_COMM_MESSAGE;
 				dev->raw_io_interface = 1;
 			if ((status[1] & AAC_OPT_NEW_COMM_TYPE1)) {
 				/* driver supports TYPE1 (Tupelo) */
 				dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
 			} else if (status[1] & AAC_OPT_NEW_COMM_TYPE2) {
 				/* driver supports TYPE2 (Denali, Yosemite) */
 				dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 			} else if (status[1] & AAC_OPT_NEW_COMM_TYPE3) {
 				/* driver supports TYPE3 (Yosemite, Thor) */
 				dev->comm_interface = AAC_COMM_MESSAGE_TYPE3;
 			} else if (status[1] & AAC_OPT_NEW_COMM_TYPE4) {
 				/* not supported TYPE - switch to sync. mode */
 				dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
 				dev->sync_mode = 1;
 			}
 		}
 		if ((status[1] & le32_to_cpu(AAC_OPT_EXTENDED)) &&
 			(status[4] & le32_to_cpu(AAC_EXTOPT_SA_FIRMWARE)))
 			dev->sa_firmware = 1;
 		else
 			dev->sa_firmware = 0;

 		if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
 		    (status[2] > dev->base_size)) {
 			aac_adapter_ioremap(dev, 0);
 			dev->base_size = status[2];
 			if (aac_adapter_ioremap(dev, status[2])) {
 				/* remap failed, go back ... */
 				dev->comm_interface = AAC_COMM_PRODUCER;
 				if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
 					printk(KERN_WARNING
 					  "aacraid: unable to map adapter.\n");
 					return NULL;
 				}
 			}
 		}
 	}
 	dev->max_msix = 0;
 	dev->msi_enabled = 0;
 	dev->adapter_shutdown = 0;
 	if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
 	  0, 0, 0, 0, 0, 0,
 	  status+0, status+1, status+2, status+3, status+4))
 	 && (status[0] == 0x00000001)) {
 		/*
 		 *	status[1] >> 16		maximum command size in KB
 		 *	status[1] & 0xFFFF	maximum FIB size
 		 *	status[2] >> 16		maximum SG elements to driver
 		 *	status[2] & 0xFFFF	maximum SG elements from driver
 		 *	status[3] & 0xFFFF	maximum number FIBs outstanding
 		 */
 		host->max_sectors = (status[1] >> 16) << 1;
 		/* Multiple of 32 for PMC */
 		dev->max_fib_size = status[1] & 0xFFE0;
 		host->sg_tablesize = status[2] >> 16;
 		dev->sg_tablesize = status[2] & 0xFFFF;
 		if (dev->pdev->device == PMC_DEVICE_S7 ||
 		    dev->pdev->device == PMC_DEVICE_S8 ||
 		    dev->pdev->device == PMC_DEVICE_S9) {
 			if (host->can_queue > (status[3] >> 16) -
 					AAC_NUM_MGT_FIB)
 				host->can_queue = (status[3] >> 16) -
 					AAC_NUM_MGT_FIB;
 		} else if (host->can_queue > (status[3] & 0xFFFF) -
 				AAC_NUM_MGT_FIB)
 			host->can_queue = (status[3] & 0xFFFF) -
 				AAC_NUM_MGT_FIB;

 		dev->max_num_aif = status[4] & 0xFFFF;
 	}
 	if (numacb > 0) {
 		if (numacb < host->can_queue)
 			host->can_queue = numacb;
 		else
 			pr_warn("numacb=%d ignored\n", numacb);
 	}

 	if (dev->pdev->device == PMC_DEVICE_S6 ||
 	    dev->pdev->device == PMC_DEVICE_S7 ||
 	    dev->pdev->device == PMC_DEVICE_S8 ||
 	    dev->pdev->device == PMC_DEVICE_S9)
 		aac_define_int_mode(dev);
 	/*
 	 *	Ok now init the communication subsystem
 	 */

 	dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
 	if (dev->queues == NULL) {
 		printk(KERN_ERR "Error could not allocate comm region.\n");
 		return NULL;
 	}

 	if (aac_comm_init(dev)<0){
 		kfree(dev->queues);
 		return NULL;
 	}
 	/*
 	 *	Initialize the list of fibs
 	 */
 	if (aac_fib_setup(dev) < 0) {
 		kfree(dev->queues);
 		return NULL;
 	}

 	INIT_LIST_HEAD(&dev->fib_list);
 	INIT_LIST_HEAD(&dev->sync_fib_list);

 	return dev;
 }
	/*
	* 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)
	*
	* 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/kernel.h>
	#include <linux/init.h>
	#include <linux/types.h>
	#include <linux/pci.h>
	#include <linux/spinlock.h>
	#include <linux/slab.h>
	#include <linux/blkdev.h>
	#include <linux/delay.h>
	#include <linux/completion.h>
	#include <linux/mm.h>
	#include <scsi/scsi_host.h>

	#include "aacraid.h"

	struct aac_common aac_config = {
	.irq_mod = 1
	};

	static inline int aac_is_msix_mode(struct aac_dev *dev)
	{
	u32 status = 0;

	if (dev->pdev->device == PMC_DEVICE_S6 \|\|
	dev->pdev->device == PMC_DEVICE_S7 \|\|
	dev->pdev->device == PMC_DEVICE_S8) {
	status = src_readl(dev, MUnit.OMR);
	}
	return (status & AAC_INT_MODE_MSIX);
	}

	static inline void aac_change_to_intx(struct aac_dev *dev)
	{
	aac_src_access_devreg(dev, AAC_DISABLE_MSIX);
	aac_src_access_devreg(dev, AAC_ENABLE_INTX);
	}

	static int aac_alloc_comm(struct aac_dev dev, void *commaddr, unsigned long commsize, unsigned long commalign)
	{
	unsigned char *base;
	unsigned long size, align;
	const unsigned long fibsize = dev->max_fib_size;
	const unsigned long printfbufsiz = 256;
	unsigned long host_rrq_size, aac_init_size;
	union aac_init *init;
	dma_addr_t phys;
	unsigned long aac_max_hostphysmempages;

	if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) \|\|
	(dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) \|\|
	(dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
	!dev->sa_firmware)) {
	host_rrq_size =
	(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)
	* sizeof(u32);
	aac_init_size = sizeof(union aac_init);
	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 &&
	dev->sa_firmware) {
	host_rrq_size = (dev->scsi_host_ptr->can_queue
	+ AAC_NUM_MGT_FIB) * sizeof(u32) * AAC_MAX_MSIX;
	aac_init_size = sizeof(union aac_init) +
	(AAC_MAX_HRRQ - 1) * sizeof(struct _rrq);
	} else {
	host_rrq_size = 0;
	aac_init_size = sizeof(union aac_init);
	}
	size = fibsize + aac_init_size + commsize + commalign +
	printfbufsiz + host_rrq_size;

	base = dma_alloc_coherent(&dev->pdev->dev, size, &phys, GFP_KERNEL);
	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;

	if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) \|\|
	(dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) \|\|
	(dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)) {
	dev->host_rrq = (u32 *)(base + fibsize);
	dev->host_rrq_pa = phys + fibsize;
	memset(dev->host_rrq, 0, host_rrq_size);
	}

	dev->init = (union aac_init *)(base + fibsize + host_rrq_size);
	dev->init_pa = phys + fibsize + host_rrq_size;

	init = dev->init;

	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
	int i;
	u64 addr;

	init->r8.init_struct_revision =
	cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_8);
	init->r8.init_flags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED \|
	INITFLAGS_DRIVER_USES_UTC_TIME \|
	INITFLAGS_DRIVER_SUPPORTS_PM);
	init->r8.init_flags \|=
	cpu_to_le32(INITFLAGS_DRIVER_SUPPORTS_HBA_MODE);
	init->r8.rr_queue_count = cpu_to_le32(dev->max_msix);
	init->r8.max_io_size =
	cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
	init->r8.max_num_aif = init->r8.reserved1 =
	init->r8.reserved2 = 0;

	for (i = 0; i < dev->max_msix; i++) {
	addr = (u64)dev->host_rrq_pa + dev->vector_cap * i *
	sizeof(u32);
	init->r8.rrq[i].host_addr_high = cpu_to_le32(
	upper_32_bits(addr));
	init->r8.rrq[i].host_addr_low = cpu_to_le32(
	lower_32_bits(addr));
	init->r8.rrq[i].msix_id = i;
	init->r8.rrq[i].element_count = cpu_to_le16(
	(u16)dev->vector_cap);
	init->r8.rrq[i].comp_thresh =
	init->r8.rrq[i].unused = 0;
	}

	pr_warn("aacraid: Comm Interface type3 enabled\n");
	} else {
	init->r7.init_struct_revision =
	cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION);
	if (dev->max_fib_size != sizeof(struct hw_fib))
	init->r7.init_struct_revision =
	cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_4);
	init->r7.no_of_msix_vectors = cpu_to_le32(SA_MINIPORT_REVISION);
	init->r7.fsrev = cpu_to_le32(dev->fsrev);

	/*
	* Adapter Fibs are the first thing allocated so that they
	* start page aligned
	*/
	dev->aif_base_va = (struct hw_fib *)base;

	init->r7.adapter_fibs_virtual_address = 0;
	init->r7.adapter_fibs_physical_address = cpu_to_le32((u32)phys);
	init->r7.adapter_fibs_size = cpu_to_le32(fibsize);
	init->r7.adapter_fib_align = cpu_to_le32(sizeof(struct hw_fib));

	/*
	* number of 4k pages of host physical memory. The aacraid fw
	* needs this number to be less than 4gb worth of pages. New
	* firmware doesn't have any issues with the mapping system, but
	* older Firmware did, and had troubles dealing with the math
	* overloading past 32 bits, thus we must limit this field.
	*/
	aac_max_hostphysmempages =
	dma_get_required_mask(&dev->pdev->dev) >> 12;
	if (aac_max_hostphysmempages < AAC_MAX_HOSTPHYSMEMPAGES)
	init->r7.host_phys_mem_pages =
	cpu_to_le32(aac_max_hostphysmempages);
	else
	init->r7.host_phys_mem_pages =
	cpu_to_le32(AAC_MAX_HOSTPHYSMEMPAGES);

	init->r7.init_flags =
	cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME \|
	INITFLAGS_DRIVER_SUPPORTS_PM);
	init->r7.max_io_commands =
	cpu_to_le32(dev->scsi_host_ptr->can_queue +
	AAC_NUM_MGT_FIB);
	init->r7.max_io_size =
	cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
	init->r7.max_fib_size = cpu_to_le32(dev->max_fib_size);
	init->r7.max_num_aif = cpu_to_le32(dev->max_num_aif);

	if (dev->comm_interface == AAC_COMM_MESSAGE) {
	init->r7.init_flags \|=
	cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
	pr_warn("aacraid: Comm Interface enabled\n");
	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE1) {
	init->r7.init_struct_revision =
	cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_6);
	init->r7.init_flags \|=
	cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED \|
	INITFLAGS_NEW_COMM_TYPE1_SUPPORTED \|
	INITFLAGS_FAST_JBOD_SUPPORTED);
	init->r7.host_rrq_addr_high =
	cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
	init->r7.host_rrq_addr_low =
	cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
	pr_warn("aacraid: Comm Interface type1 enabled\n");
	} else if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
	init->r7.init_struct_revision =
	cpu_to_le32(ADAPTER_INIT_STRUCT_REVISION_7);
	init->r7.init_flags \|=
	cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED \|
	INITFLAGS_NEW_COMM_TYPE2_SUPPORTED \|
	INITFLAGS_FAST_JBOD_SUPPORTED);
	init->r7.host_rrq_addr_high =
	cpu_to_le32(upper_32_bits(dev->host_rrq_pa));
	init->r7.host_rrq_addr_low =
	cpu_to_le32(lower_32_bits(dev->host_rrq_pa));
	init->r7.no_of_msix_vectors =
	cpu_to_le32(dev->max_msix);
	/* must be the COMM_PREFERRED_SETTINGS values */
	pr_warn("aacraid: Comm Interface type2 enabled\n");
	}
	}

	/*
	* Increment the base address by the amount already used
	*/
	base = base + fibsize + host_rrq_size + aac_init_size;
	phys = (dma_addr_t)((ulong)phys + fibsize + host_rrq_size +
	aac_init_size);

	/*
	* Align the beginning of Headers to commalign
	*/
	align = (commalign - ((uintptr_t)(base) & (commalign - 1)));
	base = base + align;
	phys = phys + align;
	/*
	* Fill in addresses of the Comm Area Headers and Queues
	*/
	*commaddr = base;
	if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3)
	init->r7.comm_header_address = cpu_to_le32((u32)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;
	if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3) {
	init->r7.printfbuf = cpu_to_le32(phys);
	init->r7.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)
	{
	atomic_set(&q->numpending, 0);
	q->dev = dev;
	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 = (__le32 *)mem;
	q->headers.consumer = (__le32 *)(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.
	*/

	int aac_send_shutdown(struct aac_dev * dev)
	{
	struct fib * fibctx;
	struct aac_close *cmd;
	int status;

	fibctx = aac_fib_alloc(dev);
	if (!fibctx)
	return -ENOMEM;
	aac_fib_init(fibctx);

	mutex_lock(&dev->ioctl_mutex);
	dev->adapter_shutdown = 1;
	mutex_unlock(&dev->ioctl_mutex);

	cmd = (struct aac_close *) fib_data(fibctx);
	cmd->command = cpu_to_le32(VM_CloseAll);
	cmd->cid = cpu_to_le32(0xfffffffe);

	status = aac_fib_send(ContainerCommand,
	fibctx,
	sizeof(struct aac_close),
	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);
	if ((dev->pdev->device == PMC_DEVICE_S7 \|\|
	dev->pdev->device == PMC_DEVICE_S8 \|\|
	dev->pdev->device == PMC_DEVICE_S9) &&
	dev->msi_enabled)
	aac_set_intx_mode(dev);
	return status;
	}

	/**
	* aac_comm_init - Initialise FSA data structures
	* @dev: Adapter to initialise
	*
	* 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.
	*/

	static 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 contiguous 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 *)(((ulong)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;
	}

	void aac_define_int_mode(struct aac_dev *dev)
	{
	int i, msi_count, min_msix;

	msi_count = i = 0;
	/* max. vectors from GET_COMM_PREFERRED_SETTINGS */
	if (dev->max_msix == 0 \|\|
	dev->pdev->device == PMC_DEVICE_S6 \|\|
	dev->sync_mode) {
	dev->max_msix = 1;
	dev->vector_cap =
	dev->scsi_host_ptr->can_queue +
	AAC_NUM_MGT_FIB;
	return;
	}

	/* Don't bother allocating more MSI-X vectors than cpus */
	msi_count = min(dev->max_msix,
	(unsigned int)num_online_cpus());

	dev->max_msix = msi_count;

	if (msi_count > AAC_MAX_MSIX)
	msi_count = AAC_MAX_MSIX;

	if (msi_count > 1 &&
	pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
	min_msix = 2;
	i = pci_alloc_irq_vectors(dev->pdev,
	min_msix, msi_count,
	PCI_IRQ_MSIX \| PCI_IRQ_AFFINITY);
	if (i > 0) {
	dev->msi_enabled = 1;
	msi_count = i;
	} else {
	dev->msi_enabled = 0;
	dev_err(&dev->pdev->dev,
	"MSIX not supported!! Will try INTX 0x%x.\n", i);
	}
	}

	if (!dev->msi_enabled)
	dev->max_msix = msi_count = 1;
	else {
	if (dev->max_msix > msi_count)
	dev->max_msix = msi_count;
	}
	if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3 && dev->sa_firmware)
	dev->vector_cap = dev->scsi_host_ptr->can_queue +
	AAC_NUM_MGT_FIB;
	else
	dev->vector_cap = (dev->scsi_host_ptr->can_queue +
	AAC_NUM_MGT_FIB) / msi_count;

	}
	struct aac_dev aac_init_adapter(struct aac_dev dev)
	{
	u32 status[5];
	struct Scsi_Host * host = dev->scsi_host_ptr;
	extern int aac_sync_mode;

	/*
	* Check the preferred comm settings, defaults from template.
	*/
	dev->management_fib_count = 0;
	spin_lock_init(&dev->manage_lock);
	spin_lock_init(&dev->sync_lock);
	spin_lock_init(&dev->iq_lock);
	dev->max_fib_size = sizeof(struct hw_fib);
	dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
	- sizeof(struct aac_fibhdr)
	- sizeof(struct aac_write) + sizeof(struct sgentry))
	/ sizeof(struct sgentry);
	dev->comm_interface = AAC_COMM_PRODUCER;
	dev->raw_io_interface = dev->raw_io_64 = 0;


	/*
	* Enable INTX mode, if not done already Enabled
	*/
	if (aac_is_msix_mode(dev)) {
	aac_change_to_intx(dev);
	dev_info(&dev->pdev->dev, "Changed firmware to INTX mode");
	}

	if ((!aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES,
	0, 0, 0, 0, 0, 0,
	status+0, status+1, status+2, status+3, status+4)) &&
	(status[0] == 0x00000001)) {
	dev->doorbell_mask = status[3];
	if (status[1] & AAC_OPT_NEW_COMM_64)
	dev->raw_io_64 = 1;
	dev->sync_mode = aac_sync_mode;
	if (dev->a_ops.adapter_comm &&
	(status[1] & AAC_OPT_NEW_COMM)) {
	dev->comm_interface = AAC_COMM_MESSAGE;
	dev->raw_io_interface = 1;
	if ((status[1] & AAC_OPT_NEW_COMM_TYPE1)) {
	/* driver supports TYPE1 (Tupelo) */
	dev->comm_interface = AAC_COMM_MESSAGE_TYPE1;
	} else if (status[1] & AAC_OPT_NEW_COMM_TYPE2) {
	/* driver supports TYPE2 (Denali, Yosemite) */
	dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
	} else if (status[1] & AAC_OPT_NEW_COMM_TYPE3) {
	/* driver supports TYPE3 (Yosemite, Thor) */
	dev->comm_interface = AAC_COMM_MESSAGE_TYPE3;
	} else if (status[1] & AAC_OPT_NEW_COMM_TYPE4) {
	/* not supported TYPE - switch to sync. mode */
	dev->comm_interface = AAC_COMM_MESSAGE_TYPE2;
	dev->sync_mode = 1;
	}
	}
	if ((status[1] & le32_to_cpu(AAC_OPT_EXTENDED)) &&
	(status[4] & le32_to_cpu(AAC_EXTOPT_SA_FIRMWARE)))
	dev->sa_firmware = 1;
	else
	dev->sa_firmware = 0;

	if ((dev->comm_interface == AAC_COMM_MESSAGE) &&
	(status[2] > dev->base_size)) {
	aac_adapter_ioremap(dev, 0);
	dev->base_size = status[2];
	if (aac_adapter_ioremap(dev, status[2])) {
	/* remap failed, go back ... */
	dev->comm_interface = AAC_COMM_PRODUCER;
	if (aac_adapter_ioremap(dev, AAC_MIN_FOOTPRINT_SIZE)) {
	printk(KERN_WARNING
	"aacraid: unable to map adapter.\n");
	return NULL;
	}
	}
	}
	}
	dev->max_msix = 0;
	dev->msi_enabled = 0;
	dev->adapter_shutdown = 0;
	if ((!aac_adapter_sync_cmd(dev, GET_COMM_PREFERRED_SETTINGS,
	0, 0, 0, 0, 0, 0,
	status+0, status+1, status+2, status+3, status+4))
	&& (status[0] == 0x00000001)) {
	/*
	* status[1] >> 16 maximum command size in KB
	* status[1] & 0xFFFF maximum FIB size
	* status[2] >> 16 maximum SG elements to driver
	* status[2] & 0xFFFF maximum SG elements from driver
	* status[3] & 0xFFFF maximum number FIBs outstanding
	*/
	host->max_sectors = (status[1] >> 16) << 1;
	/* Multiple of 32 for PMC */
	dev->max_fib_size = status[1] & 0xFFE0;
	host->sg_tablesize = status[2] >> 16;
	dev->sg_tablesize = status[2] & 0xFFFF;
	if (dev->pdev->device == PMC_DEVICE_S7 \|\|
	dev->pdev->device == PMC_DEVICE_S8 \|\|
	dev->pdev->device == PMC_DEVICE_S9) {
	if (host->can_queue > (status[3] >> 16) -
	AAC_NUM_MGT_FIB)
	host->can_queue = (status[3] >> 16) -
	AAC_NUM_MGT_FIB;
	} else if (host->can_queue > (status[3] & 0xFFFF) -
	AAC_NUM_MGT_FIB)
	host->can_queue = (status[3] & 0xFFFF) -
	AAC_NUM_MGT_FIB;

	dev->max_num_aif = status[4] & 0xFFFF;
	}
	if (numacb > 0) {
	if (numacb < host->can_queue)
	host->can_queue = numacb;
	else
	pr_warn("numacb=%d ignored\n", numacb);
	}

	if (dev->pdev->device == PMC_DEVICE_S6 \|\|
	dev->pdev->device == PMC_DEVICE_S7 \|\|
	dev->pdev->device == PMC_DEVICE_S8 \|\|
	dev->pdev->device == PMC_DEVICE_S9)
	aac_define_int_mode(dev);
	/*
	* Ok now init the communication subsystem
	*/

	dev->queues = kzalloc(sizeof(struct aac_queue_block), GFP_KERNEL);
	if (dev->queues == NULL) {
	printk(KERN_ERR "Error could not allocate comm region.\n");
	return NULL;
	}

	if (aac_comm_init(dev)<0){
	kfree(dev->queues);
	return NULL;
	}
	/*
	* Initialize the list of fibs
	*/
	if (aac_fib_setup(dev) < 0) {
	kfree(dev->queues);
	return NULL;
	}

	INIT_LIST_HEAD(&dev->fib_list);
	INIT_LIST_HEAD(&dev->sync_fib_list);

	return dev;
	}