1 files changed, 660 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
new file mode 100644
index 0000000000..bd99c5492b
--- /dev/null
+++ b/drivers/scsi/aacraid/comminit.c
@@ -0,0 +1,660 @@
+// 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:
+ *  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 <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.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 (aac_is_src(dev))
+		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;
+}
+
+static bool wait_for_io_iter(struct scsi_cmnd *cmd, void *data)
+{
+	int *active = data;
+
+	if (aac_priv(cmd)->owner == AAC_OWNER_FIRMWARE)
+		*active = *active + 1;
+	return true;
+}
+static void aac_wait_for_io_completion(struct aac_dev *aac)
+{
+	int i = 0, active;
+
+	for (i = 60; i; --i) {
+
+		active = 0;
+		scsi_host_busy_iter(aac->scsi_host_ptr,
+				    wait_for_io_iter, &active);
+		/*
+		 * We can exit If all the commands are complete
+		 */
+		if (active == 0)
+			break;
+		dev_info(&aac->pdev->dev,
+			 "Wait for %d commands to complete\n", active);
+		ssleep(1);
+	}
+	if (active)
+		dev_err(&aac->pdev->dev,
+			"%d outstanding commands during shutdown\n", active);
+}
+
+/**
+ *	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 = 0;
+
+	if (aac_adapter_check_health(dev))
+		return status;
+
+	if (!dev->adapter_shutdown) {
+		mutex_lock(&dev->ioctl_mutex);
+		dev->adapter_shutdown = 1;
+		mutex_unlock(&dev->ioctl_mutex);
+	}
+
+	aac_wait_for_io_completion(dev);
+
+	fibctx = aac_fib_alloc(dev);
+	if (!fibctx)
+		return -ENOMEM;
+	aac_fib_init(fibctx);
+
+	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 (aac_is_src(dev) &&
+	     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 (status[4] & le32_to_cpu(AAC_EXTOPT_SOFT_RESET))
+			dev->soft_reset_support = 1;
+		else
+			dev->soft_reset_support = 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 (aac_is_src(dev)) {
+			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 (aac_is_src(dev))
+		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;
+}
+