Attachment 149170 Details for Bug 230826 – replacement patch for Patch2320

[patch] replacement patch for Patch2320

linux-2.6.9-megaraid_sas-00.00.03.01-rhel4.patch (text/plain), 113.85 KB, created by Tuomo Soini on 2007-03-03 06:57:57 UTC

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Creator: Tuomo Soini

Created: 2007-03-03 06:57:57 UTC

Size: 113.85 KB

patch

obsolete

>--- linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c.megaraid_sas	2007-02-28 10:15:45.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c	2007-02-28 10:17:39.000000000 +0200
>@@ -0,0 +1,2881 @@
>+/*
>+ *
>+ *		Linux MegaRAID driver for SAS based RAID controllers
>+ *
>+ * Copyright (c) 2003-2005  LSI Logic Corporation.
>+ *
>+ *	   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 of the License, or (at your option) any later version.
>+ *
>+ * FILE		: megaraid_sas.c
>+ * Version	: v03.01
>+ *
>+ * Authors:
>+ * 	Sreenivas Bagalkote	<Sreenivas.Bagalkote@lsil.com>
>+ * 	Sumant Patro		<Sumant.Patro@lsil.com>
>+ *
>+ * List of supported controllers
>+ *
>+ * OEM	Product Name			VID	DID	SSVID	SSID
>+ * ---	------------			---	---	----	----
>+ */
>+
>+#include <linux/kernel.h>
>+#include <linux/types.h>
>+#include <linux/pci.h>
>+#include <linux/list.h>
>+#include <linux/moduleparam.h>
>+#include <linux/module.h>
>+#include <linux/spinlock.h>
>+#include <linux/interrupt.h>
>+#include <linux/delay.h>
>+#include <linux/uio.h>
>+#include <asm/uaccess.h>
>+#include <linux/fs.h>
>+#include <linux/compat.h>
>+#include <linux/mutex.h>
>+
>+#include <scsi/scsi.h>
>+#include <scsi/scsi_cmnd.h>
>+#include <scsi/scsi_device.h>
>+#include <scsi/scsi_host.h>
>+#include "megaraid_sas.h"
>+
>+MODULE_LICENSE("GPL");
>+MODULE_VERSION(MEGASAS_VERSION);
>+MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
>+MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
>+
>+/*
>+ * PCI ID table for all supported controllers
>+ */
>+static struct pci_device_id megasas_pci_table[] = {
>+
>+	{
>+	 PCI_VENDOR_ID_LSI_LOGIC,
>+	 PCI_DEVICE_ID_LSI_SAS1064R, // xscale IOP
>+	 PCI_ANY_ID,
>+	 PCI_ANY_ID,
>+	 },
>+	{
>+	 PCI_VENDOR_ID_LSI_LOGIC,
>+	 PCI_DEVICE_ID_LSI_SAS1078R, // ppc IOP
>+	 PCI_ANY_ID,
>+	 PCI_ANY_ID,
>+	},
>+	{
>+	 PCI_VENDOR_ID_LSI_LOGIC,
>+	 PCI_DEVICE_ID_LSI_VERDE_ZCR,	// vega
>+	 PCI_ANY_ID,
>+	 PCI_ANY_ID,
>+	 },
>+	{
>+	 PCI_VENDOR_ID_DELL,
>+	 PCI_DEVICE_ID_DELL_PERC5, // xscale IOP
>+	 PCI_ANY_ID,
>+	 PCI_ANY_ID,
>+	 },
>+	{0}			/* Terminating entry */
>+};
>+
>+MODULE_DEVICE_TABLE(pci, megasas_pci_table);
>+
>+static int megasas_mgmt_majorno;
>+static struct megasas_mgmt_info megasas_mgmt_info;
>+static struct fasync_struct *megasas_async_queue;
>+static DEFINE_MUTEX(megasas_async_queue_mutex);
>+
>+/**
>+ * megasas_get_cmd -	Get a command from the free pool
>+ * @instance:		Adapter soft state
>+ *
>+ * Returns a free command from the pool
>+ */
>+static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
>+						  *instance)
>+{
>+	unsigned long flags;
>+	struct megasas_cmd *cmd = NULL;
>+
>+	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
>+
>+	if (!list_empty(&instance->cmd_pool)) {
>+		cmd = list_entry((&instance->cmd_pool)->next,
>+				 struct megasas_cmd, list);
>+		list_del_init(&cmd->list);
>+	} else {
>+		printk(KERN_ERR "megasas: Command pool empty!\n");
>+	}
>+
>+	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
>+	return cmd;
>+}
>+
>+/**
>+ * megasas_return_cmd -	Return a cmd to free command pool
>+ * @instance:		Adapter soft state
>+ * @cmd:		Command packet to be returned to free command pool
>+ */
>+static inline void
>+megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
>+{
>+	unsigned long flags;
>+
>+	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
>+
>+	cmd->scmd = NULL;
>+	list_add_tail(&cmd->list, &instance->cmd_pool);
>+
>+	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
>+}
>+
>+
>+/**
>+*	The following functions are defined for xscale 
>+*	(deviceid : 1064R, PERC5) controllers
>+*/
>+
>+/**
>+ * megasas_enable_intr_xscale -	Enables interrupts
>+ * @regs:			MFI register set
>+ */
>+static inline void
>+megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
>+{
>+	writel(1, &(regs)->outbound_intr_mask);
>+
>+	/* Dummy readl to force pci flush */
>+	readl(&regs->outbound_intr_mask);
>+}
>+
>+/**
>+ * megasas_read_fw_status_reg_xscale - returns the current FW status value
>+ * @regs:			MFI register set
>+ */
>+static u32
>+megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
>+{
>+	return readl(&(regs)->outbound_msg_0);
>+}
>+/**
>+ * megasas_clear_interrupt_xscale -	Check & clear interrupt
>+ * @regs:				MFI register set
>+ */
>+static int 
>+megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
>+{
>+	u32 status;
>+	/*
>+	 * Check if it is our interrupt
>+	 */
>+	status = readl(&regs->outbound_intr_status);
>+
>+	if (!(status & MFI_OB_INTR_STATUS_MASK)) {
>+		return 1;
>+	}
>+
>+	/*
>+	 * Clear the interrupt by writing back the same value
>+	 */
>+	writel(status, &regs->outbound_intr_status);
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_fire_cmd_xscale -	Sends command to the FW
>+ * @frame_phys_addr :		Physical address of cmd
>+ * @frame_count :		Number of frames for the command
>+ * @regs :			MFI register set
>+ */
>+static inline void 
>+megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
>+{
>+	writel((frame_phys_addr >> 3)|(frame_count),
>+	       &(regs)->inbound_queue_port);
>+}
>+
>+static struct megasas_instance_template megasas_instance_template_xscale = {
>+
>+	.fire_cmd = megasas_fire_cmd_xscale,
>+	.enable_intr = megasas_enable_intr_xscale,
>+	.clear_intr = megasas_clear_intr_xscale,
>+	.read_fw_status_reg = megasas_read_fw_status_reg_xscale,
>+};
>+
>+/**
>+*	This is the end of set of functions & definitions specific 
>+*	to xscale (deviceid : 1064R, PERC5) controllers
>+*/
>+
>+/**
>+*	The following functions are defined for ppc (deviceid : 0x60) 
>+* 	controllers
>+*/
>+
>+/**
>+ * megasas_enable_intr_ppc -	Enables interrupts
>+ * @regs:			MFI register set
>+ */
>+static inline void
>+megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
>+{
>+	writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
>+    
>+	writel(~0x80000004, &(regs)->outbound_intr_mask);
>+
>+	/* Dummy readl to force pci flush */
>+	readl(&regs->outbound_intr_mask);
>+}
>+
>+/**
>+ * megasas_read_fw_status_reg_ppc - returns the current FW status value
>+ * @regs:			MFI register set
>+ */
>+static u32
>+megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
>+{
>+	return readl(&(regs)->outbound_scratch_pad);
>+}
>+
>+/**
>+ * megasas_clear_interrupt_ppc -	Check & clear interrupt
>+ * @regs:				MFI register set
>+ */
>+static int 
>+megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
>+{
>+	u32 status;
>+	/*
>+	 * Check if it is our interrupt
>+	 */
>+	status = readl(&regs->outbound_intr_status);
>+
>+	if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
>+		return 1;
>+	}
>+
>+	/*
>+	 * Clear the interrupt by writing back the same value
>+	 */
>+	writel(status, &regs->outbound_doorbell_clear);
>+
>+	return 0;
>+}
>+/**
>+ * megasas_fire_cmd_ppc -	Sends command to the FW
>+ * @frame_phys_addr :		Physical address of cmd
>+ * @frame_count :		Number of frames for the command
>+ * @regs :			MFI register set
>+ */
>+static inline void 
>+megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
>+{
>+	writel((frame_phys_addr | (frame_count<<1))|1, 
>+			&(regs)->inbound_queue_port);
>+}
>+
>+static struct megasas_instance_template megasas_instance_template_ppc = {
>+	
>+	.fire_cmd = megasas_fire_cmd_ppc,
>+	.enable_intr = megasas_enable_intr_ppc,
>+	.clear_intr = megasas_clear_intr_ppc,
>+	.read_fw_status_reg = megasas_read_fw_status_reg_ppc,
>+};
>+
>+/**
>+*	This is the end of set of functions & definitions
>+* 	specific to ppc (deviceid : 0x60) controllers
>+*/
>+
>+/**
>+ * megasas_disable_intr -	Disables interrupts
>+ * @regs:			MFI register set
>+ * FIXME : Disable intr mask value is different for 1068/1078. 
>+ * 	   Check if it can be put in template
>+ */
>+static inline void
>+megasas_disable_intr(struct megasas_instance *instance)
>+{
>+	u32 mask = 0x1f; 
>+	struct megasas_register_set __iomem *regs = instance->reg_set;
>+
>+	if(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078R)	
>+		mask = 0xffffffff; 
>+
>+	writel(mask, &regs->outbound_intr_mask);
>+
>+	/* Dummy readl to force pci flush */
>+	readl(&regs->outbound_intr_mask);
>+}
>+
>+/**
>+ * megasas_issue_polled -	Issues a polling command
>+ * @instance:			Adapter soft state
>+ * @cmd:			Command packet to be issued 
>+ *
>+ * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
>+ */
>+static int
>+megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
>+{
>+	int i;
>+	u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
>+
>+	struct megasas_header *frame_hdr = &cmd->frame->hdr;
>+
>+	frame_hdr->cmd_status = 0xFF;
>+	frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
>+
>+	/*
>+	 * Issue the frame using inbound queue port
>+	 */
>+	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
>+
>+	/*
>+	 * Wait for cmd_status to change
>+	 */
>+	for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
>+		rmb();
>+		msleep(1);
>+	}
>+
>+	if (frame_hdr->cmd_status == 0xff)
>+		return -ETIME;
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_issue_blocked_cmd -	Synchronous wrapper around regular FW cmds
>+ * @instance:			Adapter soft state
>+ * @cmd:			Command to be issued
>+ *
>+ * This function waits on an event for the command to be returned from ISR.
>+ * Used to issue ioctl commands.
>+ */
>+static int
>+megasas_issue_blocked_cmd(struct megasas_instance *instance,
>+			  struct megasas_cmd *cmd)
>+{
>+	cmd->cmd_status = ENODATA;
>+
>+	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
>+
>+	wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_issue_blocked_abort_cmd -	Aborts previously issued cmd
>+ * @instance:				Adapter soft state
>+ * @cmd_to_abort:			Previously issued cmd to be aborted
>+ *
>+ * MFI firmware can abort previously issued AEN comamnd (automatic event
>+ * notification). The megasas_issue_blocked_abort_cmd() issues such abort
>+ * cmd and blocks till it is completed.
>+ */
>+static int
>+megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
>+				struct megasas_cmd *cmd_to_abort)
>+{
>+	struct megasas_cmd *cmd;
>+	struct megasas_abort_frame *abort_fr;
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd)
>+		return -1;
>+
>+	abort_fr = &cmd->frame->abort;
>+
>+	/*
>+	 * Prepare and issue the abort frame
>+	 */
>+	abort_fr->cmd = MFI_CMD_ABORT;
>+	abort_fr->cmd_status = 0xFF;
>+	abort_fr->flags = 0;
>+	abort_fr->abort_context = cmd_to_abort->index;
>+	abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
>+	abort_fr->abort_mfi_phys_addr_hi = 0;
>+
>+	cmd->sync_cmd = 1;
>+	cmd->cmd_status = 0xFF;
>+
>+	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
>+
>+	/*
>+	 * Wait for this cmd to complete
>+	 */
>+	wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
>+
>+	megasas_return_cmd(instance, cmd);
>+	return 0;
>+}
>+
>+/**
>+ * megasas_make_sgl32 -	Prepares 32-bit SGL
>+ * @instance:		Adapter soft state
>+ * @scp:		SCSI command from the mid-layer
>+ * @mfi_sgl:		SGL to be filled in
>+ *
>+ * If successful, this function returns the number of SG elements. Otherwise,
>+ * it returnes -1.
>+ */
>+static int
>+megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
>+		   union megasas_sgl *mfi_sgl)
>+{
>+	int i;
>+	int sge_count;
>+	struct scatterlist *os_sgl;
>+
>+	/*
>+	 * Return 0 if there is no data transfer
>+	 */
>+	if (!scp->request_buffer || !scp->request_bufflen)
>+		return 0;
>+
>+	if (!scp->use_sg) {
>+		mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
>+							     scp->
>+							     request_buffer,
>+							     scp->
>+							     request_bufflen,
>+							     scp->
>+							     sc_data_direction);
>+		mfi_sgl->sge32[0].length = scp->request_bufflen;
>+
>+		return 1;
>+	}
>+
>+	os_sgl = (struct scatterlist *)scp->request_buffer;
>+	sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
>+			       scp->sc_data_direction);
>+
>+	for (i = 0; i < sge_count; i++, os_sgl++) {
>+		mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
>+		mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
>+	}
>+
>+	return sge_count;
>+}
>+
>+/**
>+ * megasas_make_sgl64 -	Prepares 64-bit SGL
>+ * @instance:		Adapter soft state
>+ * @scp:		SCSI command from the mid-layer
>+ * @mfi_sgl:		SGL to be filled in
>+ *
>+ * If successful, this function returns the number of SG elements. Otherwise,
>+ * it returnes -1.
>+ */
>+static int
>+megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
>+		   union megasas_sgl *mfi_sgl)
>+{
>+	int i;
>+	int sge_count;
>+	struct scatterlist *os_sgl;
>+
>+	/*
>+	 * Return 0 if there is no data transfer
>+	 */
>+	if (!scp->request_buffer || !scp->request_bufflen)
>+		return 0;
>+
>+	if (!scp->use_sg) {
>+		mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
>+							     scp->
>+							     request_buffer,
>+							     scp->
>+							     request_bufflen,
>+							     scp->
>+							     sc_data_direction);
>+
>+		mfi_sgl->sge64[0].length = scp->request_bufflen;
>+
>+		return 1;
>+	}
>+
>+	os_sgl = (struct scatterlist *)scp->request_buffer;
>+	sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
>+			       scp->sc_data_direction);
>+
>+	for (i = 0; i < sge_count; i++, os_sgl++) {
>+		mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
>+		mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
>+	}
>+
>+	return sge_count;
>+}
>+
>+/**
>+ * megasas_build_dcdb -	Prepares a direct cdb (DCDB) command
>+ * @instance:		Adapter soft state
>+ * @scp:		SCSI command
>+ * @cmd:		Command to be prepared in
>+ *
>+ * This function prepares CDB commands. These are typcially pass-through
>+ * commands to the devices.
>+ */
>+static int
>+megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
>+		   struct megasas_cmd *cmd)
>+{
>+	u32 sge_sz;
>+	int sge_bytes;
>+	u32 is_logical;
>+	u32 device_id;
>+	u16 flags = 0;
>+	struct megasas_pthru_frame *pthru;
>+
>+	is_logical = MEGASAS_IS_LOGICAL(scp);
>+	device_id = MEGASAS_DEV_INDEX(instance, scp);
>+	pthru = (struct megasas_pthru_frame *)cmd->frame;
>+
>+	if (scp->sc_data_direction == PCI_DMA_TODEVICE)
>+		flags = MFI_FRAME_DIR_WRITE;
>+	else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
>+		flags = MFI_FRAME_DIR_READ;
>+	else if (scp->sc_data_direction == PCI_DMA_NONE)
>+		flags = MFI_FRAME_DIR_NONE;
>+
>+	/*
>+	 * Prepare the DCDB frame
>+	 */
>+	pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
>+	pthru->cmd_status = 0x0;
>+	pthru->scsi_status = 0x0;
>+	pthru->target_id = device_id;
>+	pthru->lun = scp->device->lun;
>+	pthru->cdb_len = scp->cmd_len;
>+	pthru->timeout = 0;
>+	pthru->flags = flags;
>+	pthru->data_xfer_len = scp->request_bufflen;
>+
>+	memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
>+
>+	/*
>+	 * Construct SGL
>+	 */
>+	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
>+	    sizeof(struct megasas_sge32);
>+
>+	if (IS_DMA64) {
>+		pthru->flags |= MFI_FRAME_SGL64;
>+		pthru->sge_count = megasas_make_sgl64(instance, scp,
>+						      &pthru->sgl);
>+	} else
>+		pthru->sge_count = megasas_make_sgl32(instance, scp,
>+						      &pthru->sgl);
>+
>+	/*
>+	 * Sense info specific
>+	 */
>+	pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
>+	pthru->sense_buf_phys_addr_hi = 0;
>+	pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
>+
>+	sge_bytes = sge_sz * pthru->sge_count;
>+
>+	/*
>+	 * Compute the total number of frames this command consumes. FW uses
>+	 * this number to pull sufficient number of frames from host memory.
>+	 */
>+	cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
>+	    ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
>+
>+	if (cmd->frame_count > 7)
>+		cmd->frame_count = 8;
>+
>+	return cmd->frame_count;
>+}
>+
>+/**
>+ * megasas_build_ldio -	Prepares IOs to logical devices
>+ * @instance:		Adapter soft state
>+ * @scp:		SCSI command
>+ * @cmd:		Command to to be prepared
>+ *
>+ * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
>+ */
>+static int
>+megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
>+		   struct megasas_cmd *cmd)
>+{
>+	u32 sge_sz;
>+	int sge_bytes;
>+	u32 device_id;
>+	u8 sc = scp->cmnd[0];
>+	u16 flags = 0;
>+	struct megasas_io_frame *ldio;
>+
>+	device_id = MEGASAS_DEV_INDEX(instance, scp);
>+	ldio = (struct megasas_io_frame *)cmd->frame;
>+
>+	if (scp->sc_data_direction == PCI_DMA_TODEVICE)
>+		flags = MFI_FRAME_DIR_WRITE;
>+	else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
>+		flags = MFI_FRAME_DIR_READ;
>+
>+	/*
>+	 * Preare the Logical IO frame: 2nd bit is zero for all read cmds
>+	 */
>+	ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
>+	ldio->cmd_status = 0x0;
>+	ldio->scsi_status = 0x0;
>+	ldio->target_id = device_id;
>+	ldio->timeout = 0;
>+	ldio->reserved_0 = 0;
>+	ldio->pad_0 = 0;
>+	ldio->flags = flags;
>+	ldio->start_lba_hi = 0;
>+	ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
>+
>+	/*
>+	 * 6-byte READ(0x08) or WRITE(0x0A) cdb
>+	 */
>+	if (scp->cmd_len == 6) {
>+		ldio->lba_count = (u32) scp->cmnd[4];
>+		ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
>+		    ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
>+
>+		ldio->start_lba_lo &= 0x1FFFFF;
>+	}
>+
>+	/*
>+	 * 10-byte READ(0x28) or WRITE(0x2A) cdb
>+	 */
>+	else if (scp->cmd_len == 10) {
>+		ldio->lba_count = (u32) scp->cmnd[8] |
>+		    ((u32) scp->cmnd[7] << 8);
>+		ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
>+		    ((u32) scp->cmnd[3] << 16) |
>+		    ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
>+	}
>+
>+	/*
>+	 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
>+	 */
>+	else if (scp->cmd_len == 12) {
>+		ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
>+		    ((u32) scp->cmnd[7] << 16) |
>+		    ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
>+
>+		ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
>+		    ((u32) scp->cmnd[3] << 16) |
>+		    ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
>+	}
>+
>+	/*
>+	 * 16-byte READ(0x88) or WRITE(0x8A) cdb
>+	 */
>+	else if (scp->cmd_len == 16) {
>+		ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
>+		    ((u32) scp->cmnd[11] << 16) |
>+		    ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
>+
>+		ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
>+		    ((u32) scp->cmnd[7] << 16) |
>+		    ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
>+
>+		ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
>+		    ((u32) scp->cmnd[3] << 16) |
>+		    ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
>+
>+	}
>+
>+	/*
>+	 * Construct SGL
>+	 */
>+	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
>+	    sizeof(struct megasas_sge32);
>+
>+	if (IS_DMA64) {
>+		ldio->flags |= MFI_FRAME_SGL64;
>+		ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
>+	} else
>+		ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
>+
>+	/*
>+	 * Sense info specific
>+	 */
>+	ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
>+	ldio->sense_buf_phys_addr_hi = 0;
>+	ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
>+
>+	sge_bytes = sge_sz * ldio->sge_count;
>+
>+	cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
>+	    ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
>+
>+	if (cmd->frame_count > 7)
>+		cmd->frame_count = 8;
>+
>+	return cmd->frame_count;
>+}
>+
>+/**
>+ * megasas_is_ldio -		Checks if the cmd is for logical drive
>+ * @scmd:			SCSI command
>+ *	
>+ * Called by megasas_queue_command to find out if the command to be queued
>+ * is a logical drive command	
>+ */
>+static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
>+{
>+	if (!MEGASAS_IS_LOGICAL(cmd))
>+		return 0;
>+	switch (cmd->cmnd[0]) {
>+	case READ_10:
>+	case WRITE_10:
>+	case READ_12:
>+	case WRITE_12:
>+	case READ_6:
>+	case WRITE_6:
>+	case READ_16:
>+	case WRITE_16:
>+		return 1;
>+	default:
>+		return 0;
>+	}
>+}
>+
>+/**
>+ * megasas_queue_command -	Queue entry point
>+ * @scmd:			SCSI command to be queued
>+ * @done:			Callback entry point
>+ */
>+static int
>+megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
>+{
>+	u32 frame_count;
>+	struct megasas_cmd *cmd;
>+	struct megasas_instance *instance;
>+
>+	instance = (struct megasas_instance *)
>+	    scmd->device->host->hostdata;
>+	scmd->scsi_done = done;
>+	scmd->result = 0;
>+
>+	if (MEGASAS_IS_LOGICAL(scmd) &&
>+	    (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
>+		scmd->result = DID_BAD_TARGET << 16;
>+		goto out_done;
>+	}
>+
>+	cmd = megasas_get_cmd(instance);
>+	if (!cmd)
>+		return SCSI_MLQUEUE_HOST_BUSY;
>+
>+	/*
>+	 * Logical drive command
>+	 */
>+	if (megasas_is_ldio(scmd))
>+		frame_count = megasas_build_ldio(instance, scmd, cmd);
>+	else
>+		frame_count = megasas_build_dcdb(instance, scmd, cmd);
>+
>+	if (!frame_count)
>+		goto out_return_cmd;
>+
>+	cmd->scmd = scmd;
>+
>+	/*
>+	 * Issue the command to the FW
>+	 */
>+	atomic_inc(&instance->fw_outstanding);
>+
>+	instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
>+
>+	return 0;
>+
>+ out_return_cmd:
>+	megasas_return_cmd(instance, cmd);
>+ out_done:
>+	done(scmd);
>+	return 0;
>+}
>+
>+/**
>+ * megasas_wait_for_outstanding -	Wait for all outstanding cmds
>+ * @instance:				Adapter soft state
>+ *
>+ * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
>+ * complete all its outstanding commands. Returns error if one or more IOs
>+ * are pending after this time period. It also marks the controller dead.
>+ */
>+static int megasas_wait_for_outstanding(struct megasas_instance *instance)
>+{
>+	int i;
>+	u32 wait_time = MEGASAS_RESET_WAIT_TIME;
>+
>+	for (i = 0; i < wait_time; i++) {
>+
>+		int outstanding = atomic_read(&instance->fw_outstanding);
>+
>+		if (!outstanding)
>+			break;
>+
>+		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
>+			printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
>+			       "commands to complete\n",i,outstanding);
>+		}
>+
>+		msleep(1000);
>+	}
>+
>+	if (atomic_read(&instance->fw_outstanding)) {
>+		instance->hw_crit_error = 1;
>+		return FAILED;
>+	}
>+
>+	return SUCCESS;
>+}
>+
>+/**
>+ * megasas_generic_reset -	Generic reset routine
>+ * @scmd:			Mid-layer SCSI command
>+ *
>+ * This routine implements a generic reset handler for device, bus and host
>+ * reset requests. Device, bus and host specific reset handlers can use this
>+ * function after they do their specific tasks.
>+ */
>+static int megasas_generic_reset(struct scsi_cmnd *scmd)
>+{
>+	int ret_val;
>+	struct megasas_instance *instance;
>+
>+	instance = (struct megasas_instance *)scmd->device->host->hostdata;
>+
>+	scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
>+	       scmd->serial_number, scmd->cmnd[0]);
>+
>+	if (instance->hw_crit_error) {
>+		printk(KERN_ERR "megasas: cannot recover from previous reset "
>+		       "failures\n");
>+		return FAILED;
>+	}
>+
>+	ret_val = megasas_wait_for_outstanding(instance);
>+	if (ret_val == SUCCESS)
>+		printk(KERN_NOTICE "megasas: reset successful \n");
>+	else
>+		printk(KERN_ERR "megasas: failed to do reset\n");
>+
>+	return ret_val;
>+}
>+
>+/**
>+ * megasas_reset_device -	Device reset handler entry point
>+ */
>+static int megasas_reset_device(struct scsi_cmnd *scmd)
>+{
>+	int ret;
>+
>+	/*
>+	 * First wait for all commands to complete
>+	 */
>+	ret = megasas_generic_reset(scmd);
>+
>+	return ret;
>+}
>+
>+/**
>+ * megasas_reset_bus_host -	Bus & host reset handler entry point
>+ */
>+static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
>+{
>+	int ret;
>+
>+	/*
>+	 * Frist wait for all commands to complete
>+	 */
>+	ret = megasas_generic_reset(scmd);
>+
>+	return ret;
>+}
>+
>+/**
>+ * megasas_service_aen -	Processes an event notification
>+ * @instance:			Adapter soft state
>+ * @cmd:			AEN command completed by the ISR
>+ *
>+ * For AEN, driver sends a command down to FW that is held by the FW till an
>+ * event occurs. When an event of interest occurs, FW completes the command
>+ * that it was previously holding.
>+ *
>+ * This routines sends SIGIO signal to processes that have registered with the
>+ * driver for AEN.
>+ */
>+static void
>+megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
>+{
>+	/*
>+	 * Don't signal app if it is just an aborted previously registered aen
>+	 */
>+	if (!cmd->abort_aen)
>+		kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
>+	else
>+		cmd->abort_aen = 0;
>+
>+	instance->aen_cmd = NULL;
>+	megasas_return_cmd(instance, cmd);
>+}
>+
>+static int megasas_slave_configure(struct scsi_device *sdev)
>+{
>+	/*
>+	 * Don't export physical disk devices to the disk driver.
>+	 *
>+	 * FIXME: Currently we don't export them to the midlayer at all.
>+	 * 	  That will be fixed once LSI engineers have audited the
>+	 * 	  firmware for possible issues.
>+	 */
>+	if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
>+		return -ENXIO;
>+	/*
>+	* The RAID firmware may require extended timeouts
>+	*/
>+	if(sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
>+		sdev->timeout = 90 * HZ ;
>+	return 0;
>+}
>+
>+/*
>+ * Scsi host template for megaraid_sas driver
>+ */
>+static struct scsi_host_template megasas_template = {
>+
>+	.module = THIS_MODULE,
>+	.name = "LSI Logic SAS based MegaRAID driver",
>+	.proc_name = "megaraid_sas",
>+	.slave_configure = megasas_slave_configure,
>+	.queuecommand = megasas_queue_command,
>+	.eh_device_reset_handler = megasas_reset_device,
>+	.eh_bus_reset_handler = megasas_reset_bus_host,
>+	.eh_host_reset_handler = megasas_reset_bus_host,
>+	.use_clustering = ENABLE_CLUSTERING,
>+};
>+
>+/**
>+ * megasas_complete_int_cmd -	Completes an internal command
>+ * @instance:			Adapter soft state
>+ * @cmd:			Command to be completed
>+ *
>+ * The megasas_issue_blocked_cmd() function waits for a command to complete
>+ * after it issues a command. This function wakes up that waiting routine by
>+ * calling wake_up() on the wait queue.
>+ */
>+static void
>+megasas_complete_int_cmd(struct megasas_instance *instance,
>+			 struct megasas_cmd *cmd)
>+{
>+	cmd->cmd_status = cmd->frame->io.cmd_status;
>+
>+	if (cmd->cmd_status == ENODATA) {
>+		cmd->cmd_status = 0;
>+	}
>+	wake_up(&instance->int_cmd_wait_q);
>+}
>+
>+/**
>+ * megasas_complete_abort -	Completes aborting a command
>+ * @instance:			Adapter soft state
>+ * @cmd:			Cmd that was issued to abort another cmd
>+ *
>+ * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q 
>+ * after it issues an abort on a previously issued command. This function 
>+ * wakes up all functions waiting on the same wait queue.
>+ */
>+static void
>+megasas_complete_abort(struct megasas_instance *instance,
>+		       struct megasas_cmd *cmd)
>+{
>+	if (cmd->sync_cmd) {
>+		cmd->sync_cmd = 0;
>+		cmd->cmd_status = 0;
>+		wake_up(&instance->abort_cmd_wait_q);
>+	}
>+
>+	return;
>+}
>+
>+/**
>+ * megasas_unmap_sgbuf -	Unmap SG buffers
>+ * @instance:			Adapter soft state
>+ * @cmd:			Completed command
>+ */
>+static void
>+megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
>+{
>+	dma_addr_t buf_h;
>+	u8 opcode;
>+
>+	if (cmd->scmd->use_sg) {
>+		pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
>+			     cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
>+		return;
>+	}
>+
>+	if (!cmd->scmd->request_bufflen)
>+		return;
>+
>+	opcode = cmd->frame->hdr.cmd;
>+
>+	if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
>+		if (IS_DMA64)
>+			buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
>+		else
>+			buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
>+	} else {
>+		if (IS_DMA64)
>+			buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
>+		else
>+			buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
>+	}
>+
>+	pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
>+			 cmd->scmd->sc_data_direction);
>+	return;
>+}
>+
>+/**
>+ * megasas_complete_cmd -	Completes a command
>+ * @instance:			Adapter soft state
>+ * @cmd:			Command to be completed
>+ * @alt_status:			If non-zero, use this value as status to 
>+ * 				SCSI mid-layer instead of the value returned
>+ * 				by the FW. This should be used if caller wants
>+ * 				an alternate status (as in the case of aborted
>+ * 				commands)
>+ */
>+static void
>+megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
>+		     u8 alt_status)
>+{
>+	int exception = 0;
>+	struct megasas_header *hdr = &cmd->frame->hdr;
>+
>+	switch (hdr->cmd) {
>+
>+	case MFI_CMD_PD_SCSI_IO:
>+	case MFI_CMD_LD_SCSI_IO:
>+
>+		/*
>+		 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
>+		 * issued either through an IO path or an IOCTL path. If it
>+		 * was via IOCTL, we will send it to internal completion.
>+		 */
>+		if (cmd->sync_cmd) {
>+			cmd->sync_cmd = 0;
>+			megasas_complete_int_cmd(instance, cmd);
>+			break;
>+		}
>+
>+	case MFI_CMD_LD_READ:
>+	case MFI_CMD_LD_WRITE:
>+
>+		if (alt_status) {
>+			cmd->scmd->result = alt_status << 16;
>+			exception = 1;
>+		}
>+
>+		if (exception) {
>+
>+			atomic_dec(&instance->fw_outstanding);
>+
>+			megasas_unmap_sgbuf(instance, cmd);
>+			cmd->scmd->scsi_done(cmd->scmd);
>+			megasas_return_cmd(instance, cmd);
>+
>+			break;
>+		}
>+
>+		switch (hdr->cmd_status) {
>+
>+		case MFI_STAT_OK:
>+			cmd->scmd->result = DID_OK << 16;
>+			break;
>+
>+		case MFI_STAT_SCSI_IO_FAILED:
>+		case MFI_STAT_LD_INIT_IN_PROGRESS:
>+			cmd->scmd->result =
>+			    (DID_ERROR << 16) | hdr->scsi_status;
>+			break;
>+
>+		case MFI_STAT_SCSI_DONE_WITH_ERROR:
>+
>+			cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
>+
>+			if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
>+				memset(cmd->scmd->sense_buffer, 0,
>+				       SCSI_SENSE_BUFFERSIZE);
>+				memcpy(cmd->scmd->sense_buffer, cmd->sense,
>+				       hdr->sense_len);
>+
>+				cmd->scmd->result |= DRIVER_SENSE << 24;
>+			}
>+
>+			break;
>+
>+		case MFI_STAT_LD_OFFLINE:
>+		case MFI_STAT_DEVICE_NOT_FOUND:
>+			cmd->scmd->result = DID_BAD_TARGET << 16;
>+			break;
>+
>+		default:
>+			printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
>+			       hdr->cmd_status);
>+			cmd->scmd->result = DID_ERROR << 16;
>+			break;
>+		}
>+
>+		atomic_dec(&instance->fw_outstanding);
>+
>+		megasas_unmap_sgbuf(instance, cmd);
>+		cmd->scmd->scsi_done(cmd->scmd);
>+		megasas_return_cmd(instance, cmd);
>+
>+		break;
>+
>+	case MFI_CMD_SMP:
>+	case MFI_CMD_STP:
>+	case MFI_CMD_DCMD:
>+
>+		/*
>+		 * See if got an event notification
>+		 */
>+		if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
>+			megasas_service_aen(instance, cmd);
>+		else
>+			megasas_complete_int_cmd(instance, cmd);
>+
>+		break;
>+
>+	case MFI_CMD_ABORT:
>+		/*
>+		 * Cmd issued to abort another cmd returned
>+		 */
>+		megasas_complete_abort(instance, cmd);
>+		break;
>+
>+	default:
>+		printk("megasas: Unknown command completed! [0x%X]\n",
>+		       hdr->cmd);
>+		break;
>+	}
>+}
>+
>+/**
>+ * megasas_deplete_reply_queue -	Processes all completed commands
>+ * @instance:				Adapter soft state
>+ * @alt_status:				Alternate status to be returned to
>+ * 					SCSI mid-layer instead of the status
>+ * 					returned by the FW
>+ */
>+static int
>+megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
>+{
>+	u32 producer;
>+	u32 consumer;
>+	u32 context;
>+	struct megasas_cmd *cmd;
>+
>+	/*
>+	 * Check if it is our interrupt
>+	 * Clear the interrupt 
>+	 */
>+	if(instance->instancet->clear_intr(instance->reg_set))
>+		return IRQ_NONE;
>+
>+	producer = *instance->producer;
>+	consumer = *instance->consumer;
>+
>+	while (consumer != producer) {
>+		context = instance->reply_queue[consumer];
>+
>+		cmd = instance->cmd_list[context];
>+
>+		megasas_complete_cmd(instance, cmd, alt_status);
>+
>+		consumer++;
>+		if (consumer == (instance->max_fw_cmds + 1)) {
>+			consumer = 0;
>+		}
>+	}
>+
>+	*instance->consumer = producer;
>+
>+	return IRQ_HANDLED;
>+}
>+
>+/**
>+ * megasas_isr - isr entry point
>+ */
>+static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
>+{
>+	return megasas_deplete_reply_queue((struct megasas_instance *)devp,
>+					   DID_OK);
>+}
>+
>+/**
>+ * megasas_transition_to_ready -	Move the FW to READY state
>+ * @instance:				Adapter soft state
>+ *
>+ * During the initialization, FW passes can potentially be in any one of
>+ * several possible states. If the FW in operational, waiting-for-handshake
>+ * states, driver must take steps to bring it to ready state. Otherwise, it
>+ * has to wait for the ready state.
>+ */
>+static int
>+megasas_transition_to_ready(struct megasas_instance* instance)
>+{
>+	int i;
>+	u8 max_wait;
>+	u32 fw_state;
>+	u32 cur_state;
>+
>+	fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
>+
>+	while (fw_state != MFI_STATE_READY) {
>+
>+		printk(KERN_INFO "megasas: Waiting for FW to come to ready"
>+		       " state\n");
>+		switch (fw_state) {
>+
>+		case MFI_STATE_FAULT:
>+
>+			printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
>+			return -ENODEV;
>+
>+		case MFI_STATE_WAIT_HANDSHAKE:
>+			/*
>+			 * Set the CLR bit in inbound doorbell
>+			 */
>+			writel(MFI_INIT_CLEAR_HANDSHAKE,
>+				&instance->reg_set->inbound_doorbell);
>+
>+			max_wait = 2;
>+			cur_state = MFI_STATE_WAIT_HANDSHAKE;
>+			break;
>+
>+		case MFI_STATE_OPERATIONAL:
>+			/*
>+			 * Bring it to READY state; assuming max wait 2 secs
>+			 */
>+			megasas_disable_intr(instance);
>+			writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
>+
>+			max_wait = 10;
>+			cur_state = MFI_STATE_OPERATIONAL;
>+			break;
>+
>+		case MFI_STATE_UNDEFINED:
>+			/*
>+			 * This state should not last for more than 2 seconds
>+			 */
>+			max_wait = 2;
>+			cur_state = MFI_STATE_UNDEFINED;
>+			break;
>+
>+		case MFI_STATE_BB_INIT:
>+			max_wait = 2;
>+			cur_state = MFI_STATE_BB_INIT;
>+			break;
>+
>+		case MFI_STATE_FW_INIT:
>+			max_wait = 20;
>+			cur_state = MFI_STATE_FW_INIT;
>+			break;
>+
>+		case MFI_STATE_FW_INIT_2:
>+			max_wait = 20;
>+			cur_state = MFI_STATE_FW_INIT_2;
>+			break;
>+
>+		case MFI_STATE_DEVICE_SCAN:
>+			max_wait = 20;
>+			cur_state = MFI_STATE_DEVICE_SCAN;
>+			break;
>+
>+		case MFI_STATE_FLUSH_CACHE:
>+			max_wait = 20;
>+			cur_state = MFI_STATE_FLUSH_CACHE;
>+			break;
>+
>+		default:
>+			printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
>+			       fw_state);
>+			return -ENODEV;
>+		}
>+
>+		/*
>+		 * The cur_state should not last for more than max_wait secs
>+		 */
>+		for (i = 0; i < (max_wait * 1000); i++) {
>+			fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &  
>+					MFI_STATE_MASK ;
>+
>+			if (fw_state == cur_state) {
>+				msleep(1);
>+			} else
>+				break;
>+		}
>+
>+		/*
>+		 * Return error if fw_state hasn't changed after max_wait
>+		 */
>+		if (fw_state == cur_state) {
>+			printk(KERN_DEBUG "FW state [%d] hasn't changed "
>+			       "in %d secs\n", fw_state, max_wait);
>+			return -ENODEV;
>+		}
>+	};
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_teardown_frame_pool -	Destroy the cmd frame DMA pool
>+ * @instance:				Adapter soft state
>+ */
>+static void megasas_teardown_frame_pool(struct megasas_instance *instance)
>+{
>+	int i;
>+	u32 max_cmd = instance->max_fw_cmds;
>+	struct megasas_cmd *cmd;
>+
>+	if (!instance->frame_dma_pool)
>+		return;
>+
>+	/*
>+	 * Return all frames to pool
>+	 */
>+	for (i = 0; i < max_cmd; i++) {
>+
>+		cmd = instance->cmd_list[i];
>+
>+		if (cmd->frame)
>+			pci_pool_free(instance->frame_dma_pool, cmd->frame,
>+				      cmd->frame_phys_addr);
>+
>+		if (cmd->sense)
>+			pci_pool_free(instance->sense_dma_pool, cmd->frame,
>+				      cmd->sense_phys_addr);
>+	}
>+
>+	/*
>+	 * Now destroy the pool itself
>+	 */
>+	pci_pool_destroy(instance->frame_dma_pool);
>+	pci_pool_destroy(instance->sense_dma_pool);
>+
>+	instance->frame_dma_pool = NULL;
>+	instance->sense_dma_pool = NULL;
>+}
>+
>+/**
>+ * megasas_create_frame_pool -	Creates DMA pool for cmd frames
>+ * @instance:			Adapter soft state
>+ *
>+ * Each command packet has an embedded DMA memory buffer that is used for
>+ * filling MFI frame and the SG list that immediately follows the frame. This
>+ * function creates those DMA memory buffers for each command packet by using
>+ * PCI pool facility.
>+ */
>+static int megasas_create_frame_pool(struct megasas_instance *instance)
>+{
>+	int i;
>+	u32 max_cmd;
>+	u32 sge_sz;
>+	u32 sgl_sz;
>+	u32 total_sz;
>+	u32 frame_count;
>+	struct megasas_cmd *cmd;
>+
>+	max_cmd = instance->max_fw_cmds;
>+
>+	/*
>+	 * Size of our frame is 64 bytes for MFI frame, followed by max SG
>+	 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
>+	 */
>+	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
>+	    sizeof(struct megasas_sge32);
>+
>+	/*
>+	 * Calculated the number of 64byte frames required for SGL
>+	 */
>+	sgl_sz = sge_sz * instance->max_num_sge;
>+	frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
>+
>+	/*
>+	 * We need one extra frame for the MFI command
>+	 */
>+	frame_count++;
>+
>+	total_sz = MEGAMFI_FRAME_SIZE * frame_count;
>+	/*
>+	 * Use DMA pool facility provided by PCI layer
>+	 */
>+	instance->frame_dma_pool = pci_pool_create("megasas frame pool",
>+						   instance->pdev, total_sz, 64,
>+						   0);
>+
>+	if (!instance->frame_dma_pool) {
>+		printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
>+		return -ENOMEM;
>+	}
>+
>+	instance->sense_dma_pool = pci_pool_create("megasas sense pool",
>+						   instance->pdev, 128, 4, 0);
>+
>+	if (!instance->sense_dma_pool) {
>+		printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
>+
>+		pci_pool_destroy(instance->frame_dma_pool);
>+		instance->frame_dma_pool = NULL;
>+
>+		return -ENOMEM;
>+	}
>+
>+	/*
>+	 * Allocate and attach a frame to each of the commands in cmd_list.
>+	 * By making cmd->index as the context instead of the &cmd, we can
>+	 * always use 32bit context regardless of the architecture
>+	 */
>+	for (i = 0; i < max_cmd; i++) {
>+
>+		cmd = instance->cmd_list[i];
>+
>+		cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
>+					    GFP_KERNEL, &cmd->frame_phys_addr);
>+
>+		cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
>+					    GFP_KERNEL, &cmd->sense_phys_addr);
>+
>+		/*
>+		 * megasas_teardown_frame_pool() takes care of freeing
>+		 * whatever has been allocated
>+		 */
>+		if (!cmd->frame || !cmd->sense) {
>+			printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
>+			megasas_teardown_frame_pool(instance);
>+			return -ENOMEM;
>+		}
>+
>+		cmd->frame->io.context = cmd->index;
>+	}
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_free_cmds -	Free all the cmds in the free cmd pool
>+ * @instance:		Adapter soft state
>+ */
>+static void megasas_free_cmds(struct megasas_instance *instance)
>+{
>+	int i;
>+	/* First free the MFI frame pool */
>+	megasas_teardown_frame_pool(instance);
>+
>+	/* Free all the commands in the cmd_list */
>+	for (i = 0; i < instance->max_fw_cmds; i++)
>+		kfree(instance->cmd_list[i]);
>+
>+	/* Free the cmd_list buffer itself */
>+	kfree(instance->cmd_list);
>+	instance->cmd_list = NULL;
>+
>+	INIT_LIST_HEAD(&instance->cmd_pool);
>+}
>+
>+/**
>+ * megasas_alloc_cmds -	Allocates the command packets
>+ * @instance:		Adapter soft state
>+ *
>+ * Each command that is issued to the FW, whether IO commands from the OS or
>+ * internal commands like IOCTLs, are wrapped in local data structure called
>+ * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
>+ * the FW.
>+ *
>+ * Each frame has a 32-bit field called context (tag). This context is used
>+ * to get back the megasas_cmd from the frame when a frame gets completed in
>+ * the ISR. Typically the address of the megasas_cmd itself would be used as
>+ * the context. But we wanted to keep the differences between 32 and 64 bit
>+ * systems to the mininum. We always use 32 bit integers for the context. In
>+ * this driver, the 32 bit values are the indices into an array cmd_list.
>+ * This array is used only to look up the megasas_cmd given the context. The
>+ * free commands themselves are maintained in a linked list called cmd_pool.
>+ */
>+static int megasas_alloc_cmds(struct megasas_instance *instance)
>+{
>+	int i;
>+	int j;
>+	u32 max_cmd;
>+	struct megasas_cmd *cmd;
>+
>+	max_cmd = instance->max_fw_cmds;
>+
>+	/*
>+	 * instance->cmd_list is an array of struct megasas_cmd pointers.
>+	 * Allocate the dynamic array first and then allocate individual
>+	 * commands.
>+	 */
>+	instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
>+				     GFP_KERNEL);
>+
>+	if (!instance->cmd_list) {
>+		printk(KERN_DEBUG "megasas: out of memory\n");
>+		return -ENOMEM;
>+	}
>+
>+	memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
>+
>+	for (i = 0; i < max_cmd; i++) {
>+		instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
>+						GFP_KERNEL);
>+
>+		if (!instance->cmd_list[i]) {
>+
>+			for (j = 0; j < i; j++)
>+				kfree(instance->cmd_list[j]);
>+
>+			kfree(instance->cmd_list);
>+			instance->cmd_list = NULL;
>+
>+			return -ENOMEM;
>+		}
>+	}
>+
>+	/*
>+	 * Add all the commands to command pool (instance->cmd_pool)
>+	 */
>+	for (i = 0; i < max_cmd; i++) {
>+		cmd = instance->cmd_list[i];
>+		memset(cmd, 0, sizeof(struct megasas_cmd));
>+		cmd->index = i;
>+		cmd->instance = instance;
>+
>+		list_add_tail(&cmd->list, &instance->cmd_pool);
>+	}
>+
>+	/*
>+	 * Create a frame pool and assign one frame to each cmd
>+	 */
>+	if (megasas_create_frame_pool(instance)) {
>+		printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
>+		megasas_free_cmds(instance);
>+	}
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_get_controller_info -	Returns FW's controller structure
>+ * @instance:				Adapter soft state
>+ * @ctrl_info:				Controller information structure
>+ *
>+ * Issues an internal command (DCMD) to get the FW's controller structure.
>+ * This information is mainly used to find out the maximum IO transfer per
>+ * command supported by the FW.
>+ */
>+static int
>+megasas_get_ctrl_info(struct megasas_instance *instance,
>+		      struct megasas_ctrl_info *ctrl_info)
>+{
>+	int ret = 0;
>+	struct megasas_cmd *cmd;
>+	struct megasas_dcmd_frame *dcmd;
>+	struct megasas_ctrl_info *ci;
>+	dma_addr_t ci_h = 0;
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd) {
>+		printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
>+		return -ENOMEM;
>+	}
>+
>+	dcmd = &cmd->frame->dcmd;
>+
>+	ci = pci_alloc_consistent(instance->pdev,
>+				  sizeof(struct megasas_ctrl_info), &ci_h);
>+
>+	if (!ci) {
>+		printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
>+		megasas_return_cmd(instance, cmd);
>+		return -ENOMEM;
>+	}
>+
>+	memset(ci, 0, sizeof(*ci));
>+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
>+
>+	dcmd->cmd = MFI_CMD_DCMD;
>+	dcmd->cmd_status = 0xFF;
>+	dcmd->sge_count = 1;
>+	dcmd->flags = MFI_FRAME_DIR_READ;
>+	dcmd->timeout = 0;
>+	dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
>+	dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
>+	dcmd->sgl.sge32[0].phys_addr = ci_h;
>+	dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
>+
>+	if (!megasas_issue_polled(instance, cmd)) {
>+		ret = 0;
>+		memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
>+	} else {
>+		ret = -1;
>+	}
>+
>+	pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
>+			    ci, ci_h);
>+
>+	megasas_return_cmd(instance, cmd);
>+	return ret;
>+}
>+
>+/**
>+ * megasas_init_mfi -	Initializes the FW
>+ * @instance:		Adapter soft state
>+ *
>+ * This is the main function for initializing MFI firmware.
>+ */
>+static int megasas_init_mfi(struct megasas_instance *instance)
>+{
>+	u32 context_sz;
>+	u32 reply_q_sz;
>+	u32 max_sectors_1;
>+	u32 max_sectors_2;
>+	struct megasas_register_set __iomem *reg_set;
>+
>+	struct megasas_cmd *cmd;
>+	struct megasas_ctrl_info *ctrl_info;
>+
>+	struct megasas_init_frame *init_frame;
>+	struct megasas_init_queue_info *initq_info;
>+	dma_addr_t init_frame_h;
>+	dma_addr_t initq_info_h;
>+
>+	/*
>+	 * Map the message registers
>+	 */
>+	instance->base_addr = pci_resource_start(instance->pdev, 0);
>+
>+	if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
>+		printk(KERN_DEBUG "megasas: IO memory region busy!\n");
>+		return -EBUSY;
>+	}
>+
>+	instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
>+
>+	if (!instance->reg_set) {
>+		printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
>+		goto fail_ioremap;
>+	}
>+
>+	reg_set = instance->reg_set;
>+
>+	switch(instance->pdev->device)
>+	{
>+		case PCI_DEVICE_ID_LSI_SAS1078R:	
>+			instance->instancet = &megasas_instance_template_ppc;
>+			break;
>+		case PCI_DEVICE_ID_LSI_SAS1064R:
>+		case PCI_DEVICE_ID_DELL_PERC5:
>+		default:
>+			instance->instancet = &megasas_instance_template_xscale;
>+			break;
>+	}
>+
>+	/*
>+	 * We expect the FW state to be READY
>+	 */
>+	if (megasas_transition_to_ready(instance))
>+		goto fail_ready_state;
>+
>+	/*
>+	 * Get various operational parameters from status register
>+	 */
>+	instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
>+	instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> 
>+					0x10;
>+	/*
>+	 * Create a pool of commands
>+	 */
>+	if (megasas_alloc_cmds(instance))
>+		goto fail_alloc_cmds;
>+
>+	/*
>+	 * Allocate memory for reply queue. Length of reply queue should
>+	 * be _one_ more than the maximum commands handled by the firmware.
>+	 *
>+	 * Note: When FW completes commands, it places corresponding contex
>+	 * values in this circular reply queue. This circular queue is a fairly
>+	 * typical producer-consumer queue. FW is the producer (of completed
>+	 * commands) and the driver is the consumer.
>+	 */
>+	context_sz = sizeof(u32);
>+	reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
>+
>+	instance->reply_queue = pci_alloc_consistent(instance->pdev,
>+						     reply_q_sz,
>+						     &instance->reply_queue_h);
>+
>+	if (!instance->reply_queue) {
>+		printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
>+		goto fail_reply_queue;
>+	}
>+
>+	/*
>+	 * Prepare a init frame. Note the init frame points to queue info
>+	 * structure. Each frame has SGL allocated after first 64 bytes. For
>+	 * this frame - since we don't need any SGL - we use SGL's space as
>+	 * queue info structure
>+	 *
>+	 * We will not get a NULL command below. We just created the pool.
>+	 */
>+	cmd = megasas_get_cmd(instance);
>+
>+	init_frame = (struct megasas_init_frame *)cmd->frame;
>+	initq_info = (struct megasas_init_queue_info *)
>+	    ((unsigned long)init_frame + 64);
>+
>+	init_frame_h = cmd->frame_phys_addr;
>+	initq_info_h = init_frame_h + 64;
>+
>+	memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
>+	memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
>+
>+	initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
>+	initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
>+
>+	initq_info->producer_index_phys_addr_lo = instance->producer_h;
>+	initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
>+
>+	init_frame->cmd = MFI_CMD_INIT;
>+	init_frame->cmd_status = 0xFF;
>+	init_frame->queue_info_new_phys_addr_lo = initq_info_h;
>+
>+	init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
>+
>+	/*
>+	 * disable the intr before fire the init frame to FW 
>+	 */	
>+	megasas_disable_intr(instance);
>+	
>+	/*
>+	 * Issue the init frame in polled mode
>+	 */
>+	if (megasas_issue_polled(instance, cmd)) {
>+		printk(KERN_DEBUG "megasas: Failed to init firmware\n");
>+		goto fail_fw_init;
>+	}
>+
>+	megasas_return_cmd(instance, cmd);
>+
>+	ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
>+
>+	/*
>+	 * Compute the max allowed sectors per IO: The controller info has two
>+	 * limits on max sectors. Driver should use the minimum of these two.
>+	 *
>+	 * 1 << stripe_sz_ops.min = max sectors per strip
>+	 *
>+	 * Note that older firmwares ( < FW ver 30) didn't report information
>+	 * to calculate max_sectors_1. So the number ended up as zero always.
>+	 */
>+	if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
>+
>+		max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
>+		    ctrl_info->max_strips_per_io;
>+		max_sectors_2 = ctrl_info->max_request_size;
>+
>+		instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
>+		    ? max_sectors_1 : max_sectors_2;
>+	} else
>+		instance->max_sectors_per_req = instance->max_num_sge *
>+		    PAGE_SIZE / 512;
>+
>+	kfree(ctrl_info);
>+
>+	return 0;
>+
>+      fail_fw_init:
>+	megasas_return_cmd(instance, cmd);
>+
>+	pci_free_consistent(instance->pdev, reply_q_sz,
>+			    instance->reply_queue, instance->reply_queue_h);
>+      fail_reply_queue:
>+	megasas_free_cmds(instance);
>+
>+      fail_alloc_cmds:
>+      fail_ready_state:
>+	iounmap(instance->reg_set);
>+
>+      fail_ioremap:
>+	pci_release_regions(instance->pdev);
>+
>+	return -EINVAL;
>+}
>+
>+/**
>+ * megasas_release_mfi -	Reverses the FW initialization
>+ * @intance:			Adapter soft state
>+ */
>+static void megasas_release_mfi(struct megasas_instance *instance)
>+{
>+	u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
>+
>+	pci_free_consistent(instance->pdev, reply_q_sz,
>+			    instance->reply_queue, instance->reply_queue_h);
>+
>+	megasas_free_cmds(instance);
>+
>+	iounmap(instance->reg_set);
>+
>+	pci_release_regions(instance->pdev);
>+}
>+
>+/**
>+ * megasas_get_seq_num -	Gets latest event sequence numbers
>+ * @instance:			Adapter soft state
>+ * @eli:			FW event log sequence numbers information
>+ *
>+ * FW maintains a log of all events in a non-volatile area. Upper layers would
>+ * usually find out the latest sequence number of the events, the seq number at
>+ * the boot etc. They would "read" all the events below the latest seq number
>+ * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
>+ * number), they would subsribe to AEN (asynchronous event notification) and
>+ * wait for the events to happen.
>+ */
>+static int
>+megasas_get_seq_num(struct megasas_instance *instance,
>+		    struct megasas_evt_log_info *eli)
>+{
>+	struct megasas_cmd *cmd;
>+	struct megasas_dcmd_frame *dcmd;
>+	struct megasas_evt_log_info *el_info;
>+	dma_addr_t el_info_h = 0;
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd) {
>+		return -ENOMEM;
>+	}
>+
>+	dcmd = &cmd->frame->dcmd;
>+	el_info = pci_alloc_consistent(instance->pdev,
>+				       sizeof(struct megasas_evt_log_info),
>+				       &el_info_h);
>+
>+	if (!el_info) {
>+		megasas_return_cmd(instance, cmd);
>+		return -ENOMEM;
>+	}
>+
>+	memset(el_info, 0, sizeof(*el_info));
>+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
>+
>+	dcmd->cmd = MFI_CMD_DCMD;
>+	dcmd->cmd_status = 0x0;
>+	dcmd->sge_count = 1;
>+	dcmd->flags = MFI_FRAME_DIR_READ;
>+	dcmd->timeout = 0;
>+	dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
>+	dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
>+	dcmd->sgl.sge32[0].phys_addr = el_info_h;
>+	dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
>+
>+	megasas_issue_blocked_cmd(instance, cmd);
>+
>+	/*
>+	 * Copy the data back into callers buffer
>+	 */
>+	memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
>+
>+	pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
>+			    el_info, el_info_h);
>+
>+	megasas_return_cmd(instance, cmd);
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_register_aen -	Registers for asynchronous event notification
>+ * @instance:			Adapter soft state
>+ * @seq_num:			The starting sequence number
>+ * @class_locale:		Class of the event
>+ *
>+ * This function subscribes for AEN for events beyond the @seq_num. It requests
>+ * to be notified if and only if the event is of type @class_locale
>+ */
>+static int
>+megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
>+		     u32 class_locale_word)
>+{
>+	int ret_val;
>+	struct megasas_cmd *cmd;
>+	struct megasas_dcmd_frame *dcmd;
>+	union megasas_evt_class_locale curr_aen;
>+	union megasas_evt_class_locale prev_aen;
>+
>+	/*
>+	 * If there an AEN pending already (aen_cmd), check if the
>+	 * class_locale of that pending AEN is inclusive of the new
>+	 * AEN request we currently have. If it is, then we don't have
>+	 * to do anything. In other words, whichever events the current
>+	 * AEN request is subscribing to, have already been subscribed
>+	 * to.
>+	 *
>+	 * If the old_cmd is _not_ inclusive, then we have to abort
>+	 * that command, form a class_locale that is superset of both
>+	 * old and current and re-issue to the FW
>+	 */
>+
>+	curr_aen.word = class_locale_word;
>+
>+	if (instance->aen_cmd) {
>+
>+		prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
>+
>+		/*
>+		 * A class whose enum value is smaller is inclusive of all
>+		 * higher values. If a PROGRESS (= -1) was previously
>+		 * registered, then a new registration requests for higher
>+		 * classes need not be sent to FW. They are automatically
>+		 * included.
>+		 *
>+		 * Locale numbers don't have such hierarchy. They are bitmap
>+		 * values
>+		 */
>+		if ((prev_aen.members.class <= curr_aen.members.class) &&
>+		    !((prev_aen.members.locale & curr_aen.members.locale) ^
>+		      curr_aen.members.locale)) {
>+			/*
>+			 * Previously issued event registration includes
>+			 * current request. Nothing to do.
>+			 */
>+			return 0;
>+		} else {
>+			curr_aen.members.locale |= prev_aen.members.locale;
>+
>+			if (prev_aen.members.class < curr_aen.members.class)
>+				curr_aen.members.class = prev_aen.members.class;
>+
>+			instance->aen_cmd->abort_aen = 1;
>+			ret_val = megasas_issue_blocked_abort_cmd(instance,
>+								  instance->
>+								  aen_cmd);
>+
>+			if (ret_val) {
>+				printk(KERN_DEBUG "megasas: Failed to abort "
>+				       "previous AEN command\n");
>+				return ret_val;
>+			}
>+		}
>+	}
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd)
>+		return -ENOMEM;
>+
>+	dcmd = &cmd->frame->dcmd;
>+
>+	memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
>+
>+	/*
>+	 * Prepare DCMD for aen registration
>+	 */
>+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
>+
>+	dcmd->cmd = MFI_CMD_DCMD;
>+	dcmd->cmd_status = 0x0;
>+	dcmd->sge_count = 1;
>+	dcmd->flags = MFI_FRAME_DIR_READ;
>+	dcmd->timeout = 0;
>+	dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
>+	dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
>+	dcmd->mbox.w[0] = seq_num;
>+	dcmd->mbox.w[1] = curr_aen.word;
>+	dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
>+	dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
>+
>+	/*
>+	 * Store reference to the cmd used to register for AEN. When an
>+	 * application wants us to register for AEN, we have to abort this
>+	 * cmd and re-register with a new EVENT LOCALE supplied by that app
>+	 */
>+	instance->aen_cmd = cmd;
>+
>+	/*
>+	 * Issue the aen registration frame
>+	 */
>+	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_start_aen -	Subscribes to AEN during driver load time
>+ * @instance:		Adapter soft state
>+ */
>+static int megasas_start_aen(struct megasas_instance *instance)
>+{
>+	struct megasas_evt_log_info eli;
>+	union megasas_evt_class_locale class_locale;
>+
>+	/*
>+	 * Get the latest sequence number from FW
>+	 */
>+	memset(&eli, 0, sizeof(eli));
>+
>+	if (megasas_get_seq_num(instance, &eli))
>+		return -1;
>+
>+	/*
>+	 * Register AEN with FW for latest sequence number plus 1
>+	 */
>+	class_locale.members.reserved = 0;
>+	class_locale.members.locale = MR_EVT_LOCALE_ALL;
>+	class_locale.members.class = MR_EVT_CLASS_DEBUG;
>+
>+	return megasas_register_aen(instance, eli.newest_seq_num + 1,
>+				    class_locale.word);
>+}
>+
>+/**
>+ * megasas_io_attach -	Attaches this driver to SCSI mid-layer
>+ * @instance:		Adapter soft state
>+ */
>+static int megasas_io_attach(struct megasas_instance *instance)
>+{
>+	struct Scsi_Host *host = instance->host;
>+
>+	/*
>+	 * Export parameters required by SCSI mid-layer
>+	 */
>+	host->irq = instance->pdev->irq;
>+	host->unique_id = instance->unique_id;
>+	host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
>+	host->this_id = instance->init_id;
>+	host->sg_tablesize = instance->max_num_sge;
>+	host->max_sectors = instance->max_sectors_per_req;
>+	host->cmd_per_lun = 128;
>+	host->max_channel = MEGASAS_MAX_CHANNELS - 1;
>+	host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
>+	host->max_lun = MEGASAS_MAX_LUN;
>+	host->max_cmd_len = 16;
>+
>+	/*
>+	 * Notify the mid-layer about the new controller
>+	 */
>+	if (scsi_add_host(host, &instance->pdev->dev)) {
>+		printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
>+		return -ENODEV;
>+	}
>+
>+	/*
>+	 * Trigger SCSI to scan our drives
>+	 */
>+	scsi_scan_host(host);
>+	return 0;
>+}
>+
>+/**
>+ * megasas_probe_one -	PCI hotplug entry point
>+ * @pdev:		PCI device structure
>+ * @id:			PCI ids of supported hotplugged adapter	
>+ */
>+static int __devinit
>+megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
>+{
>+	int rval;
>+	struct Scsi_Host *host;
>+	struct megasas_instance *instance;
>+
>+	/*
>+	 * Announce PCI information
>+	 */
>+	printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
>+	       pdev->vendor, pdev->device, pdev->subsystem_vendor,
>+	       pdev->subsystem_device);
>+
>+	printk("bus %d:slot %d:func %d\n",
>+	       pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
>+
>+	/*
>+	 * PCI prepping: enable device set bus mastering and dma mask
>+	 */
>+	rval = pci_enable_device(pdev);
>+
>+	if (rval) {
>+		return rval;
>+	}
>+
>+	pci_set_master(pdev);
>+
>+	/*
>+	 * All our contollers are capable of performing 64-bit DMA
>+	 */
>+	if (IS_DMA64) {
>+		if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
>+
>+			if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
>+				goto fail_set_dma_mask;
>+		}
>+	} else {
>+		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
>+			goto fail_set_dma_mask;
>+	}
>+
>+	host = scsi_host_alloc(&megasas_template,
>+			       sizeof(struct megasas_instance));
>+
>+	if (!host) {
>+		printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
>+		goto fail_alloc_instance;
>+	}
>+
>+	instance = (struct megasas_instance *)host->hostdata;
>+	memset(instance, 0, sizeof(*instance));
>+
>+	instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
>+						  &instance->producer_h);
>+	instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
>+						  &instance->consumer_h);
>+
>+	if (!instance->producer || !instance->consumer) {
>+		printk(KERN_DEBUG "megasas: Failed to allocate memory for "
>+		       "producer, consumer\n");
>+		goto fail_alloc_dma_buf;
>+	}
>+
>+	*instance->producer = 0;
>+	*instance->consumer = 0;
>+
>+	instance->evt_detail = pci_alloc_consistent(pdev,
>+						    sizeof(struct
>+							   megasas_evt_detail),
>+						    &instance->evt_detail_h);
>+
>+	if (!instance->evt_detail) {
>+		printk(KERN_DEBUG "megasas: Failed to allocate memory for "
>+		       "event detail structure\n");
>+		goto fail_alloc_dma_buf;
>+	}
>+
>+	/*
>+	 * Initialize locks and queues
>+	 */
>+	INIT_LIST_HEAD(&instance->cmd_pool);
>+		
>+	atomic_set(&instance->fw_outstanding,0);
>+
>+	init_waitqueue_head(&instance->int_cmd_wait_q);
>+	init_waitqueue_head(&instance->abort_cmd_wait_q);
>+
>+	spin_lock_init(&instance->cmd_pool_lock);
>+
>+	sema_init(&instance->aen_mutex, 1);
>+	sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
>+
>+	/*
>+	 * Initialize PCI related and misc parameters
>+	 */
>+	instance->pdev = pdev;
>+	instance->host = host;
>+	instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
>+	instance->init_id = MEGASAS_DEFAULT_INIT_ID;
>+
>+	/*
>+	 * Initialize MFI Firmware
>+	 */
>+	if (megasas_init_mfi(instance))
>+		goto fail_init_mfi;
>+
>+	/*
>+	 * Register IRQ
>+	 */
>+	if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) {
>+		printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
>+		goto fail_irq;
>+	}
>+
>+	instance->instancet->enable_intr(instance->reg_set);
>+
>+	/*
>+	 * Store instance in PCI softstate
>+	 */
>+	pci_set_drvdata(pdev, instance);
>+
>+	/*
>+	 * Add this controller to megasas_mgmt_info structure so that it
>+	 * can be exported to management applications
>+	 */
>+	megasas_mgmt_info.count++;
>+	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
>+	megasas_mgmt_info.max_index++;
>+
>+	/*
>+	 * Initiate AEN (Asynchronous Event Notification)
>+	 */
>+	if (megasas_start_aen(instance)) {
>+		printk(KERN_DEBUG "megasas: start aen failed\n");
>+		goto fail_start_aen;
>+	}
>+
>+	/*
>+	 * Register with SCSI mid-layer
>+	 */
>+	if (megasas_io_attach(instance))
>+		goto fail_io_attach;
>+
>+	return 0;
>+
>+      fail_start_aen:
>+      fail_io_attach:
>+	megasas_mgmt_info.count--;
>+	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
>+	megasas_mgmt_info.max_index--;
>+
>+	pci_set_drvdata(pdev, NULL);
>+	megasas_disable_intr(instance);
>+	free_irq(instance->pdev->irq, instance);
>+
>+	megasas_release_mfi(instance);
>+
>+      fail_irq:
>+      fail_init_mfi:
>+      fail_alloc_dma_buf:
>+	if (instance->evt_detail)
>+		pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
>+				    instance->evt_detail,
>+				    instance->evt_detail_h);
>+
>+	if (instance->producer)
>+		pci_free_consistent(pdev, sizeof(u32), instance->producer,
>+				    instance->producer_h);
>+	if (instance->consumer)
>+		pci_free_consistent(pdev, sizeof(u32), instance->consumer,
>+				    instance->consumer_h);
>+	scsi_host_put(host);
>+
>+      fail_alloc_instance:
>+      fail_set_dma_mask:
>+	pci_disable_device(pdev);
>+
>+	return -ENODEV;
>+}
>+
>+/**
>+ * megasas_flush_cache -	Requests FW to flush all its caches
>+ * @instance:			Adapter soft state
>+ */
>+static void megasas_flush_cache(struct megasas_instance *instance)
>+{
>+	struct megasas_cmd *cmd;
>+	struct megasas_dcmd_frame *dcmd;
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd)
>+		return;
>+
>+	dcmd = &cmd->frame->dcmd;
>+
>+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
>+
>+	dcmd->cmd = MFI_CMD_DCMD;
>+	dcmd->cmd_status = 0x0;
>+	dcmd->sge_count = 0;
>+	dcmd->flags = MFI_FRAME_DIR_NONE;
>+	dcmd->timeout = 0;
>+	dcmd->data_xfer_len = 0;
>+	dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
>+	dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
>+
>+	megasas_issue_blocked_cmd(instance, cmd);
>+
>+	megasas_return_cmd(instance, cmd);
>+
>+	return;
>+}
>+
>+/**
>+ * megasas_shutdown_controller -	Instructs FW to shutdown the controller
>+ * @instance:				Adapter soft state
>+ */
>+static void megasas_shutdown_controller(struct megasas_instance *instance)
>+{
>+	struct megasas_cmd *cmd;
>+	struct megasas_dcmd_frame *dcmd;
>+
>+	cmd = megasas_get_cmd(instance);
>+
>+	if (!cmd)
>+		return;
>+
>+	if (instance->aen_cmd)
>+		megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
>+
>+	dcmd = &cmd->frame->dcmd;
>+
>+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
>+
>+	dcmd->cmd = MFI_CMD_DCMD;
>+	dcmd->cmd_status = 0x0;
>+	dcmd->sge_count = 0;
>+	dcmd->flags = MFI_FRAME_DIR_NONE;
>+	dcmd->timeout = 0;
>+	dcmd->data_xfer_len = 0;
>+	dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
>+
>+	megasas_issue_blocked_cmd(instance, cmd);
>+
>+	megasas_return_cmd(instance, cmd);
>+
>+	return;
>+}
>+
>+/**
>+ * megasas_detach_one -	PCI hot"un"plug entry point
>+ * @pdev:		PCI device structure
>+ */
>+static void megasas_detach_one(struct pci_dev *pdev)
>+{
>+	int i;
>+	struct Scsi_Host *host;
>+	struct megasas_instance *instance;
>+
>+	instance = pci_get_drvdata(pdev);
>+	host = instance->host;
>+
>+	scsi_remove_host(instance->host);
>+	megasas_flush_cache(instance);
>+	megasas_shutdown_controller(instance);
>+
>+	/*
>+	 * Take the instance off the instance array. Note that we will not
>+	 * decrement the max_index. We let this array be sparse array
>+	 */
>+	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
>+		if (megasas_mgmt_info.instance[i] == instance) {
>+			megasas_mgmt_info.count--;
>+			megasas_mgmt_info.instance[i] = NULL;
>+
>+			break;
>+		}
>+	}
>+
>+	pci_set_drvdata(instance->pdev, NULL);
>+
>+	megasas_disable_intr(instance);
>+
>+	free_irq(instance->pdev->irq, instance);
>+
>+	megasas_release_mfi(instance);
>+
>+	pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
>+			    instance->evt_detail, instance->evt_detail_h);
>+
>+	pci_free_consistent(pdev, sizeof(u32), instance->producer,
>+			    instance->producer_h);
>+
>+	pci_free_consistent(pdev, sizeof(u32), instance->consumer,
>+			    instance->consumer_h);
>+
>+	scsi_host_put(host);
>+
>+	pci_set_drvdata(pdev, NULL);
>+
>+	pci_disable_device(pdev);
>+
>+	return;
>+}
>+
>+/**
>+ * megasas_shutdown -	Shutdown entry point
>+ * @device:		Generic device structure
>+ */
>+static void megasas_shutdown(struct pci_dev *pdev)
>+{
>+	struct megasas_instance *instance = pci_get_drvdata(pdev);
>+	megasas_flush_cache(instance);
>+}
>+
>+/**
>+ * megasas_mgmt_open -	char node "open" entry point
>+ */
>+static int megasas_mgmt_open(struct inode *inode, struct file *filep)
>+{
>+	/*
>+	 * Allow only those users with admin rights
>+	 */
>+	if (!capable(CAP_SYS_ADMIN))
>+		return -EACCES;
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_mgmt_release - char node "release" entry point
>+ */
>+static int megasas_mgmt_release(struct inode *inode, struct file *filep)
>+{
>+	filep->private_data = NULL;
>+	fasync_helper(-1, filep, 0, &megasas_async_queue);
>+
>+	return 0;
>+}
>+
>+/**
>+ * megasas_mgmt_fasync -	Async notifier registration from applications
>+ *
>+ * This function adds the calling process to a driver global queue. When an
>+ * event occurs, SIGIO will be sent to all processes in this queue.
>+ */
>+static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
>+{
>+	int rc;
>+
>+	mutex_lock(&megasas_async_queue_mutex);
>+
>+	rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
>+
>+	mutex_unlock(&megasas_async_queue_mutex);
>+
>+	if (rc >= 0) {
>+		/* For sanity check when we get ioctl */
>+		filep->private_data = filep;
>+		return 0;
>+	}
>+
>+	printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
>+
>+	return rc;
>+}
>+
>+/**
>+ * megasas_mgmt_fw_ioctl -	Issues management ioctls to FW
>+ * @instance:			Adapter soft state
>+ * @argp:			User's ioctl packet
>+ */
>+static int
>+megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
>+		      struct megasas_iocpacket __user * user_ioc,
>+		      struct megasas_iocpacket *ioc)
>+{
>+	struct megasas_sge32 *kern_sge32;
>+	struct megasas_cmd *cmd;
>+	void *kbuff_arr[MAX_IOCTL_SGE];
>+	dma_addr_t buf_handle = 0;
>+	int error = 0, i;
>+	void *sense = NULL;
>+	dma_addr_t sense_handle;
>+	u32 *sense_ptr;
>+
>+	memset(kbuff_arr, 0, sizeof(kbuff_arr));
>+
>+	if (ioc->sge_count > MAX_IOCTL_SGE) {
>+		printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
>+		       ioc->sge_count, MAX_IOCTL_SGE);
>+		return -EINVAL;
>+	}
>+
>+	cmd = megasas_get_cmd(instance);
>+	if (!cmd) {
>+		printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
>+		return -ENOMEM;
>+	}
>+
>+	/*
>+	 * User's IOCTL packet has 2 frames (maximum). Copy those two
>+	 * frames into our cmd's frames. cmd->frame's context will get
>+	 * overwritten when we copy from user's frames. So set that value
>+	 * alone separately
>+	 */
>+	memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
>+	cmd->frame->hdr.context = cmd->index;
>+
>+	/*
>+	 * The management interface between applications and the fw uses
>+	 * MFI frames. E.g, RAID configuration changes, LD property changes
>+	 * etc are accomplishes through different kinds of MFI frames. The
>+	 * driver needs to care only about substituting user buffers with
>+	 * kernel buffers in SGLs. The location of SGL is embedded in the
>+	 * struct iocpacket itself.
>+	 */
>+	kern_sge32 = (struct megasas_sge32 *)
>+	    ((unsigned long)cmd->frame + ioc->sgl_off);
>+
>+	/*
>+	 * For each user buffer, create a mirror buffer and copy in
>+	 */
>+	for (i = 0; i < ioc->sge_count; i++) {
>+		kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
>+						    ioc->sgl[i].iov_len,
>+						    &buf_handle);
>+		if (!kbuff_arr[i]) {
>+			printk(KERN_DEBUG "megasas: Failed to alloc "
>+			       "kernel SGL buffer for IOCTL \n");
>+			error = -ENOMEM;
>+			goto out;
>+		}
>+
>+		/*
>+		 * We don't change the dma_coherent_mask, so
>+		 * pci_alloc_consistent only returns 32bit addresses
>+		 */
>+		kern_sge32[i].phys_addr = (u32) buf_handle;
>+		kern_sge32[i].length = ioc->sgl[i].iov_len;
>+
>+		/*
>+		 * We created a kernel buffer corresponding to the
>+		 * user buffer. Now copy in from the user buffer
>+		 */
>+		if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
>+				   (u32) (ioc->sgl[i].iov_len))) {
>+			error = -EFAULT;
>+			goto out;
>+		}
>+	}
>+
>+	if (ioc->sense_len) {
>+		sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
>+					     &sense_handle);
>+		if (!sense) {
>+			error = -ENOMEM;
>+			goto out;
>+		}
>+
>+		sense_ptr =
>+		    (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
>+		*sense_ptr = sense_handle;
>+	}
>+
>+	/*
>+	 * Set the sync_cmd flag so that the ISR knows not to complete this
>+	 * cmd to the SCSI mid-layer
>+	 */
>+	cmd->sync_cmd = 1;
>+	megasas_issue_blocked_cmd(instance, cmd);
>+	cmd->sync_cmd = 0;
>+
>+	/*
>+	 * copy out the kernel buffers to user buffers
>+	 */
>+	for (i = 0; i < ioc->sge_count; i++) {
>+		if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
>+				 ioc->sgl[i].iov_len)) {
>+			error = -EFAULT;
>+			goto out;
>+		}
>+	}
>+
>+	/*
>+	 * copy out the sense
>+	 */
>+	if (ioc->sense_len) {
>+		/*
>+		 * sense_ptr points to the location that has the user
>+		 * sense buffer address
>+		 */
>+		sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
>+				     ioc->sense_off);
>+
>+		if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
>+				 sense, ioc->sense_len)) {
>+			error = -EFAULT;
>+			goto out;
>+		}
>+	}
>+
>+	/*
>+	 * copy the status codes returned by the fw
>+	 */
>+	if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
>+			 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
>+		printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
>+		error = -EFAULT;
>+	}
>+
>+      out:
>+	if (sense) {
>+		pci_free_consistent(instance->pdev, ioc->sense_len,
>+				    sense, sense_handle);
>+	}
>+
>+	for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
>+		pci_free_consistent(instance->pdev,
>+				    kern_sge32[i].length,
>+				    kbuff_arr[i], kern_sge32[i].phys_addr);
>+	}
>+
>+	megasas_return_cmd(instance, cmd);
>+	return error;
>+}
>+
>+static struct megasas_instance *megasas_lookup_instance(u16 host_no)
>+{
>+	int i;
>+
>+	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
>+
>+		if ((megasas_mgmt_info.instance[i]) &&
>+		    (megasas_mgmt_info.instance[i]->host->host_no == host_no))
>+			return megasas_mgmt_info.instance[i];
>+	}
>+
>+	return NULL;
>+}
>+
>+static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
>+{
>+	struct megasas_iocpacket __user *user_ioc =
>+	    (struct megasas_iocpacket __user *)arg;
>+	struct megasas_iocpacket *ioc;
>+	struct megasas_instance *instance;
>+	int error;
>+
>+	ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
>+	if (!ioc)
>+		return -ENOMEM;
>+
>+	if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
>+		error = -EFAULT;
>+		goto out_kfree_ioc;
>+	}
>+
>+	instance = megasas_lookup_instance(ioc->host_no);
>+	if (!instance) {
>+		error = -ENODEV;
>+		goto out_kfree_ioc;
>+	}
>+
>+	/*
>+	 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
>+	 */
>+	if (down_interruptible(&instance->ioctl_sem)) {
>+		error = -ERESTARTSYS;
>+		goto out_kfree_ioc;
>+	}
>+	error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
>+	up(&instance->ioctl_sem);
>+
>+      out_kfree_ioc:
>+	kfree(ioc);
>+	return error;
>+}
>+
>+static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
>+{
>+	struct megasas_instance *instance;
>+	struct megasas_aen aen;
>+	int error;
>+
>+	if (file->private_data != file) {
>+		printk(KERN_DEBUG "megasas: fasync_helper was not "
>+		       "called first\n");
>+		return -EINVAL;
>+	}
>+
>+	if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
>+		return -EFAULT;
>+
>+	instance = megasas_lookup_instance(aen.host_no);
>+
>+	if (!instance)
>+		return -ENODEV;
>+
>+	down(&instance->aen_mutex);
>+	error = megasas_register_aen(instance, aen.seq_num,
>+				     aen.class_locale_word);
>+	up(&instance->aen_mutex);
>+	return error;
>+}
>+
>+/**
>+ * megasas_mgmt_ioctl -	char node ioctl entry point
>+ */
>+static long
>+megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>+{
>+	switch (cmd) {
>+	case MEGASAS_IOC_FIRMWARE:
>+		return megasas_mgmt_ioctl_fw(file, arg);
>+	case MEGASAS_IOC_GET_AEN:
>+		return megasas_mgmt_ioctl_aen(file, arg);
>+	}
>+
>+	return -ENOTTY;
>+}
>+
>+#ifdef CONFIG_COMPAT
>+static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
>+{
>+	struct compat_megasas_iocpacket __user *cioc =
>+	    (struct compat_megasas_iocpacket __user *)arg;
>+	struct megasas_iocpacket __user *ioc =
>+	    compat_alloc_user_space(sizeof(struct megasas_iocpacket));
>+	int i;
>+	int error = 0;
>+
>+	clear_user(ioc, sizeof(*ioc));
>+
>+	if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
>+	    copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
>+	    copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
>+	    copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
>+	    copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
>+	    copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
>+		return -EFAULT;
>+
>+	for (i = 0; i < MAX_IOCTL_SGE; i++) {
>+		compat_uptr_t ptr;
>+
>+		if (get_user(ptr, &cioc->sgl[i].iov_base) ||
>+		    put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
>+		    copy_in_user(&ioc->sgl[i].iov_len,
>+				 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
>+			return -EFAULT;
>+	}
>+
>+	error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
>+
>+	if (copy_in_user(&cioc->frame.hdr.cmd_status,
>+			 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
>+		printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
>+		return -EFAULT;
>+	}
>+	return error;
>+}
>+
>+static long
>+megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
>+			  unsigned long arg)
>+{
>+	switch (cmd) {
>+	case MEGASAS_IOC_FIRMWARE32:
>+		return megasas_mgmt_compat_ioctl_fw(file, arg);
>+	case MEGASAS_IOC_GET_AEN:
>+		return megasas_mgmt_ioctl_aen(file, arg);
>+	}
>+
>+	return -ENOTTY;
>+}
>+#endif
>+
>+/*
>+ * File operations structure for management interface
>+ */
>+static struct file_operations megasas_mgmt_fops = {
>+	.owner = THIS_MODULE,
>+	.open = megasas_mgmt_open,
>+	.release = megasas_mgmt_release,
>+	.fasync = megasas_mgmt_fasync,
>+	.unlocked_ioctl = megasas_mgmt_ioctl,
>+#ifdef CONFIG_COMPAT
>+	.compat_ioctl = megasas_mgmt_compat_ioctl,
>+#endif
>+};
>+
>+/*
>+ * PCI hotplug support registration structure
>+ */
>+static struct pci_driver megasas_pci_driver = {
>+
>+	.name = "megaraid_sas",
>+	.id_table = megasas_pci_table,
>+	.probe = megasas_probe_one,
>+	.remove = __devexit_p(megasas_detach_one),
>+	.shutdown = megasas_shutdown,
>+};
>+
>+/*
>+ * Sysfs driver attributes
>+ */
>+static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
>+{
>+	return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
>+			MEGASAS_VERSION);
>+}
>+
>+static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
>+
>+static ssize_t
>+megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
>+{
>+	return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
>+			MEGASAS_RELDATE);
>+}
>+
>+static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
>+		   NULL);
>+
>+/**
>+ * megasas_init - Driver load entry point
>+ */
>+static int __init megasas_init(void)
>+{
>+	int rval;
>+
>+	/*
>+	 * Announce driver version and other information
>+	 */
>+	printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
>+	       MEGASAS_EXT_VERSION);
>+
>+	memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
>+
>+	/*
>+	 * Register character device node
>+	 */
>+	rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
>+
>+	if (rval < 0) {
>+		printk(KERN_DEBUG "megasas: failed to open device node\n");
>+		return rval;
>+	}
>+
>+	megasas_mgmt_majorno = rval;
>+
>+	/*
>+	 * Register ourselves as PCI hotplug module
>+	 */
>+	rval = pci_module_init(&megasas_pci_driver);
>+
>+	if (rval) {
>+		printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
>+		unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
>+	}
>+
>+	driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
>+	driver_create_file(&megasas_pci_driver.driver,
>+			   &driver_attr_release_date);
>+
>+	return rval;
>+}
>+
>+/**
>+ * megasas_exit - Driver unload entry point
>+ */
>+static void __exit megasas_exit(void)
>+{
>+	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
>+	driver_remove_file(&megasas_pci_driver.driver,
>+			   &driver_attr_release_date);
>+
>+	pci_unregister_driver(&megasas_pci_driver);
>+	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
>+}
>+
>+module_init(megasas_init);
>+module_exit(megasas_exit);
>--- linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.h.megaraid_sas	2007-02-28 10:15:54.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.h	2007-02-28 10:17:39.000000000 +0200
>@@ -0,0 +1,1177 @@
>+/*
>+ *
>+ *		Linux MegaRAID driver for SAS based RAID controllers
>+ *
>+ * Copyright (c) 2003-2005  LSI Logic Corporation.
>+ *
>+ *		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 of the License, or (at your option) any later version.
>+ *
>+ * FILE		: megaraid_sas.h
>+ */
>+
>+#ifndef LSI_MEGARAID_SAS_H
>+#define LSI_MEGARAID_SAS_H
>+
>+/**
>+ * MegaRAID SAS Driver meta data
>+ */
>+#define MEGASAS_VERSION				"00.00.03.01"
>+#define MEGASAS_RELDATE				"May 14, 2006"
>+#define MEGASAS_EXT_VERSION			"Sun May 14 22:49:52 PDT 2006"
>+
>+/*
>+ * Device IDs
>+ */
>+#define	PCI_DEVICE_ID_LSI_SAS1078R		0x0060
>+#define	PCI_DEVICE_ID_LSI_VERDE_ZCR		0x0413
>+
>+/*
>+ * =====================================
>+ * MegaRAID SAS MFI firmware definitions
>+ * =====================================
>+ */
>+
>+/*
>+ * MFI stands for  MegaRAID SAS FW Interface. This is just a moniker for 
>+ * protocol between the software and firmware. Commands are issued using
>+ * "message frames"
>+ */
>+
>+/**
>+ * FW posts its state in upper 4 bits of outbound_msg_0 register
>+ */
>+#define MFI_STATE_MASK				0xF0000000
>+#define MFI_STATE_UNDEFINED			0x00000000
>+#define MFI_STATE_BB_INIT			0x10000000
>+#define MFI_STATE_FW_INIT			0x40000000
>+#define MFI_STATE_WAIT_HANDSHAKE		0x60000000
>+#define MFI_STATE_FW_INIT_2			0x70000000
>+#define MFI_STATE_DEVICE_SCAN			0x80000000
>+#define MFI_STATE_FLUSH_CACHE			0xA0000000
>+#define MFI_STATE_READY				0xB0000000
>+#define MFI_STATE_OPERATIONAL			0xC0000000
>+#define MFI_STATE_FAULT				0xF0000000
>+
>+#define MEGAMFI_FRAME_SIZE			64
>+
>+/**
>+ * During FW init, clear pending cmds & reset state using inbound_msg_0
>+ *
>+ * ABORT	: Abort all pending cmds
>+ * READY	: Move from OPERATIONAL to READY state; discard queue info
>+ * MFIMODE	: Discard (possible) low MFA posted in 64-bit mode (??)
>+ * CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver
>+ */
>+#define MFI_INIT_ABORT				0x00000000
>+#define MFI_INIT_READY				0x00000002
>+#define MFI_INIT_MFIMODE			0x00000004
>+#define MFI_INIT_CLEAR_HANDSHAKE		0x00000008
>+#define MFI_RESET_FLAGS				MFI_INIT_READY|MFI_INIT_MFIMODE
>+
>+/**
>+ * MFI frame flags
>+ */
>+#define MFI_FRAME_POST_IN_REPLY_QUEUE		0x0000
>+#define MFI_FRAME_DONT_POST_IN_REPLY_QUEUE	0x0001
>+#define MFI_FRAME_SGL32				0x0000
>+#define MFI_FRAME_SGL64				0x0002
>+#define MFI_FRAME_SENSE32			0x0000
>+#define MFI_FRAME_SENSE64			0x0004
>+#define MFI_FRAME_DIR_NONE			0x0000
>+#define MFI_FRAME_DIR_WRITE			0x0008
>+#define MFI_FRAME_DIR_READ			0x0010
>+#define MFI_FRAME_DIR_BOTH			0x0018
>+
>+/**
>+ * Definition for cmd_status
>+ */
>+#define MFI_CMD_STATUS_POLL_MODE		0xFF
>+
>+/**
>+ * MFI command opcodes
>+ */
>+#define MFI_CMD_INIT				0x00
>+#define MFI_CMD_LD_READ				0x01
>+#define MFI_CMD_LD_WRITE			0x02
>+#define MFI_CMD_LD_SCSI_IO			0x03
>+#define MFI_CMD_PD_SCSI_IO			0x04
>+#define MFI_CMD_DCMD				0x05
>+#define MFI_CMD_ABORT				0x06
>+#define MFI_CMD_SMP				0x07
>+#define MFI_CMD_STP				0x08
>+
>+#define MR_DCMD_CTRL_GET_INFO			0x01010000
>+
>+#define MR_DCMD_CTRL_CACHE_FLUSH		0x01101000
>+#define MR_FLUSH_CTRL_CACHE			0x01
>+#define MR_FLUSH_DISK_CACHE			0x02
>+
>+#define MR_DCMD_CTRL_SHUTDOWN			0x01050000
>+#define MR_ENABLE_DRIVE_SPINDOWN		0x01
>+
>+#define MR_DCMD_CTRL_EVENT_GET_INFO		0x01040100
>+#define MR_DCMD_CTRL_EVENT_GET			0x01040300
>+#define MR_DCMD_CTRL_EVENT_WAIT			0x01040500
>+#define MR_DCMD_LD_GET_PROPERTIES		0x03030000
>+
>+#define MR_DCMD_CLUSTER				0x08000000
>+#define MR_DCMD_CLUSTER_RESET_ALL		0x08010100
>+#define MR_DCMD_CLUSTER_RESET_LD		0x08010200
>+
>+/**
>+ * MFI command completion codes
>+ */
>+enum MFI_STAT {
>+	MFI_STAT_OK = 0x00,
>+	MFI_STAT_INVALID_CMD = 0x01,
>+	MFI_STAT_INVALID_DCMD = 0x02,
>+	MFI_STAT_INVALID_PARAMETER = 0x03,
>+	MFI_STAT_INVALID_SEQUENCE_NUMBER = 0x04,
>+	MFI_STAT_ABORT_NOT_POSSIBLE = 0x05,
>+	MFI_STAT_APP_HOST_CODE_NOT_FOUND = 0x06,
>+	MFI_STAT_APP_IN_USE = 0x07,
>+	MFI_STAT_APP_NOT_INITIALIZED = 0x08,
>+	MFI_STAT_ARRAY_INDEX_INVALID = 0x09,
>+	MFI_STAT_ARRAY_ROW_NOT_EMPTY = 0x0a,
>+	MFI_STAT_CONFIG_RESOURCE_CONFLICT = 0x0b,
>+	MFI_STAT_DEVICE_NOT_FOUND = 0x0c,
>+	MFI_STAT_DRIVE_TOO_SMALL = 0x0d,
>+	MFI_STAT_FLASH_ALLOC_FAIL = 0x0e,
>+	MFI_STAT_FLASH_BUSY = 0x0f,
>+	MFI_STAT_FLASH_ERROR = 0x10,
>+	MFI_STAT_FLASH_IMAGE_BAD = 0x11,
>+	MFI_STAT_FLASH_IMAGE_INCOMPLETE = 0x12,
>+	MFI_STAT_FLASH_NOT_OPEN = 0x13,
>+	MFI_STAT_FLASH_NOT_STARTED = 0x14,
>+	MFI_STAT_FLUSH_FAILED = 0x15,
>+	MFI_STAT_HOST_CODE_NOT_FOUNT = 0x16,
>+	MFI_STAT_LD_CC_IN_PROGRESS = 0x17,
>+	MFI_STAT_LD_INIT_IN_PROGRESS = 0x18,
>+	MFI_STAT_LD_LBA_OUT_OF_RANGE = 0x19,
>+	MFI_STAT_LD_MAX_CONFIGURED = 0x1a,
>+	MFI_STAT_LD_NOT_OPTIMAL = 0x1b,
>+	MFI_STAT_LD_RBLD_IN_PROGRESS = 0x1c,
>+	MFI_STAT_LD_RECON_IN_PROGRESS = 0x1d,
>+	MFI_STAT_LD_WRONG_RAID_LEVEL = 0x1e,
>+	MFI_STAT_MAX_SPARES_EXCEEDED = 0x1f,
>+	MFI_STAT_MEMORY_NOT_AVAILABLE = 0x20,
>+	MFI_STAT_MFC_HW_ERROR = 0x21,
>+	MFI_STAT_NO_HW_PRESENT = 0x22,
>+	MFI_STAT_NOT_FOUND = 0x23,
>+	MFI_STAT_NOT_IN_ENCL = 0x24,
>+	MFI_STAT_PD_CLEAR_IN_PROGRESS = 0x25,
>+	MFI_STAT_PD_TYPE_WRONG = 0x26,
>+	MFI_STAT_PR_DISABLED = 0x27,
>+	MFI_STAT_ROW_INDEX_INVALID = 0x28,
>+	MFI_STAT_SAS_CONFIG_INVALID_ACTION = 0x29,
>+	MFI_STAT_SAS_CONFIG_INVALID_DATA = 0x2a,
>+	MFI_STAT_SAS_CONFIG_INVALID_PAGE = 0x2b,
>+	MFI_STAT_SAS_CONFIG_INVALID_TYPE = 0x2c,
>+	MFI_STAT_SCSI_DONE_WITH_ERROR = 0x2d,
>+	MFI_STAT_SCSI_IO_FAILED = 0x2e,
>+	MFI_STAT_SCSI_RESERVATION_CONFLICT = 0x2f,
>+	MFI_STAT_SHUTDOWN_FAILED = 0x30,
>+	MFI_STAT_TIME_NOT_SET = 0x31,
>+	MFI_STAT_WRONG_STATE = 0x32,
>+	MFI_STAT_LD_OFFLINE = 0x33,
>+	MFI_STAT_PEER_NOTIFICATION_REJECTED = 0x34,
>+	MFI_STAT_PEER_NOTIFICATION_FAILED = 0x35,
>+	MFI_STAT_RESERVATION_IN_PROGRESS = 0x36,
>+	MFI_STAT_I2C_ERRORS_DETECTED = 0x37,
>+	MFI_STAT_PCI_ERRORS_DETECTED = 0x38,
>+
>+	MFI_STAT_INVALID_STATUS = 0xFF
>+};
>+
>+/*
>+ * Number of mailbox bytes in DCMD message frame
>+ */
>+#define MFI_MBOX_SIZE				12
>+
>+enum MR_EVT_CLASS {
>+
>+	MR_EVT_CLASS_DEBUG = -2,
>+	MR_EVT_CLASS_PROGRESS = -1,
>+	MR_EVT_CLASS_INFO = 0,
>+	MR_EVT_CLASS_WARNING = 1,
>+	MR_EVT_CLASS_CRITICAL = 2,
>+	MR_EVT_CLASS_FATAL = 3,
>+	MR_EVT_CLASS_DEAD = 4,
>+
>+};
>+
>+enum MR_EVT_LOCALE {
>+
>+	MR_EVT_LOCALE_LD = 0x0001,
>+	MR_EVT_LOCALE_PD = 0x0002,
>+	MR_EVT_LOCALE_ENCL = 0x0004,
>+	MR_EVT_LOCALE_BBU = 0x0008,
>+	MR_EVT_LOCALE_SAS = 0x0010,
>+	MR_EVT_LOCALE_CTRL = 0x0020,
>+	MR_EVT_LOCALE_CONFIG = 0x0040,
>+	MR_EVT_LOCALE_CLUSTER = 0x0080,
>+	MR_EVT_LOCALE_ALL = 0xffff,
>+
>+};
>+
>+enum MR_EVT_ARGS {
>+
>+	MR_EVT_ARGS_NONE,
>+	MR_EVT_ARGS_CDB_SENSE,
>+	MR_EVT_ARGS_LD,
>+	MR_EVT_ARGS_LD_COUNT,
>+	MR_EVT_ARGS_LD_LBA,
>+	MR_EVT_ARGS_LD_OWNER,
>+	MR_EVT_ARGS_LD_LBA_PD_LBA,
>+	MR_EVT_ARGS_LD_PROG,
>+	MR_EVT_ARGS_LD_STATE,
>+	MR_EVT_ARGS_LD_STRIP,
>+	MR_EVT_ARGS_PD,
>+	MR_EVT_ARGS_PD_ERR,
>+	MR_EVT_ARGS_PD_LBA,
>+	MR_EVT_ARGS_PD_LBA_LD,
>+	MR_EVT_ARGS_PD_PROG,
>+	MR_EVT_ARGS_PD_STATE,
>+	MR_EVT_ARGS_PCI,
>+	MR_EVT_ARGS_RATE,
>+	MR_EVT_ARGS_STR,
>+	MR_EVT_ARGS_TIME,
>+	MR_EVT_ARGS_ECC,
>+
>+};
>+
>+/*
>+ * SAS controller properties
>+ */
>+struct megasas_ctrl_prop {
>+
>+	u16 seq_num;
>+	u16 pred_fail_poll_interval;
>+	u16 intr_throttle_count;
>+	u16 intr_throttle_timeouts;
>+	u8 rebuild_rate;
>+	u8 patrol_read_rate;
>+	u8 bgi_rate;
>+	u8 cc_rate;
>+	u8 recon_rate;
>+	u8 cache_flush_interval;
>+	u8 spinup_drv_count;
>+	u8 spinup_delay;
>+	u8 cluster_enable;
>+	u8 coercion_mode;
>+	u8 alarm_enable;
>+	u8 disable_auto_rebuild;
>+	u8 disable_battery_warn;
>+	u8 ecc_bucket_size;
>+	u16 ecc_bucket_leak_rate;
>+	u8 restore_hotspare_on_insertion;
>+	u8 expose_encl_devices;
>+	u8 reserved[38];
>+
>+} __attribute__ ((packed));
>+
>+/*
>+ * SAS controller information
>+ */
>+struct megasas_ctrl_info {
>+
>+	/*
>+	 * PCI device information
>+	 */
>+	struct {
>+
>+		u16 vendor_id;
>+		u16 device_id;
>+		u16 sub_vendor_id;
>+		u16 sub_device_id;
>+		u8 reserved[24];
>+
>+	} __attribute__ ((packed)) pci;
>+
>+	/*
>+	 * Host interface information
>+	 */
>+	struct {
>+
>+		u8 PCIX:1;
>+		u8 PCIE:1;
>+		u8 iSCSI:1;
>+		u8 SAS_3G:1;
>+		u8 reserved_0:4;
>+		u8 reserved_1[6];
>+		u8 port_count;
>+		u64 port_addr[8];
>+
>+	} __attribute__ ((packed)) host_interface;
>+
>+	/*
>+	 * Device (backend) interface information
>+	 */
>+	struct {
>+
>+		u8 SPI:1;
>+		u8 SAS_3G:1;
>+		u8 SATA_1_5G:1;
>+		u8 SATA_3G:1;
>+		u8 reserved_0:4;
>+		u8 reserved_1[6];
>+		u8 port_count;
>+		u64 port_addr[8];
>+
>+	} __attribute__ ((packed)) device_interface;
>+
>+	/*
>+	 * List of components residing in flash. All str are null terminated
>+	 */
>+	u32 image_check_word;
>+	u32 image_component_count;
>+
>+	struct {
>+
>+		char name[8];
>+		char version[32];
>+		char build_date[16];
>+		char built_time[16];
>+
>+	} __attribute__ ((packed)) image_component[8];
>+
>+	/*
>+	 * List of flash components that have been flashed on the card, but
>+	 * are not in use, pending reset of the adapter. This list will be
>+	 * empty if a flash operation has not occurred. All stings are null
>+	 * terminated
>+	 */
>+	u32 pending_image_component_count;
>+
>+	struct {
>+
>+		char name[8];
>+		char version[32];
>+		char build_date[16];
>+		char build_time[16];
>+
>+	} __attribute__ ((packed)) pending_image_component[8];
>+
>+	u8 max_arms;
>+	u8 max_spans;
>+	u8 max_arrays;
>+	u8 max_lds;
>+
>+	char product_name[80];
>+	char serial_no[32];
>+
>+	/*
>+	 * Other physical/controller/operation information. Indicates the
>+	 * presence of the hardware
>+	 */
>+	struct {
>+
>+		u32 bbu:1;
>+		u32 alarm:1;
>+		u32 nvram:1;
>+		u32 uart:1;
>+		u32 reserved:28;
>+
>+	} __attribute__ ((packed)) hw_present;
>+
>+	u32 current_fw_time;
>+
>+	/*
>+	 * Maximum data transfer sizes
>+	 */
>+	u16 max_concurrent_cmds;
>+	u16 max_sge_count;
>+	u32 max_request_size;
>+
>+	/*
>+	 * Logical and physical device counts
>+	 */
>+	u16 ld_present_count;
>+	u16 ld_degraded_count;
>+	u16 ld_offline_count;
>+
>+	u16 pd_present_count;
>+	u16 pd_disk_present_count;
>+	u16 pd_disk_pred_failure_count;
>+	u16 pd_disk_failed_count;
>+
>+	/*
>+	 * Memory size information
>+	 */
>+	u16 nvram_size;
>+	u16 memory_size;
>+	u16 flash_size;
>+
>+	/*
>+	 * Error counters
>+	 */
>+	u16 mem_correctable_error_count;
>+	u16 mem_uncorrectable_error_count;
>+
>+	/*
>+	 * Cluster information
>+	 */
>+	u8 cluster_permitted;
>+	u8 cluster_active;
>+
>+	/*
>+	 * Additional max data transfer sizes
>+	 */
>+	u16 max_strips_per_io;
>+
>+	/*
>+	 * Controller capabilities structures
>+	 */
>+	struct {
>+
>+		u32 raid_level_0:1;
>+		u32 raid_level_1:1;
>+		u32 raid_level_5:1;
>+		u32 raid_level_1E:1;
>+		u32 raid_level_6:1;
>+		u32 reserved:27;
>+
>+	} __attribute__ ((packed)) raid_levels;
>+
>+	struct {
>+
>+		u32 rbld_rate:1;
>+		u32 cc_rate:1;
>+		u32 bgi_rate:1;
>+		u32 recon_rate:1;
>+		u32 patrol_rate:1;
>+		u32 alarm_control:1;
>+		u32 cluster_supported:1;
>+		u32 bbu:1;
>+		u32 spanning_allowed:1;
>+		u32 dedicated_hotspares:1;
>+		u32 revertible_hotspares:1;
>+		u32 foreign_config_import:1;
>+		u32 self_diagnostic:1;
>+		u32 mixed_redundancy_arr:1;
>+		u32 global_hot_spares:1;
>+		u32 reserved:17;
>+
>+	} __attribute__ ((packed)) adapter_operations;
>+
>+	struct {
>+
>+		u32 read_policy:1;
>+		u32 write_policy:1;
>+		u32 io_policy:1;
>+		u32 access_policy:1;
>+		u32 disk_cache_policy:1;
>+		u32 reserved:27;
>+
>+	} __attribute__ ((packed)) ld_operations;
>+
>+	struct {
>+
>+		u8 min;
>+		u8 max;
>+		u8 reserved[2];
>+
>+	} __attribute__ ((packed)) stripe_sz_ops;
>+
>+	struct {
>+
>+		u32 force_online:1;
>+		u32 force_offline:1;
>+		u32 force_rebuild:1;
>+		u32 reserved:29;
>+
>+	} __attribute__ ((packed)) pd_operations;
>+
>+	struct {
>+
>+		u32 ctrl_supports_sas:1;
>+		u32 ctrl_supports_sata:1;
>+		u32 allow_mix_in_encl:1;
>+		u32 allow_mix_in_ld:1;
>+		u32 allow_sata_in_cluster:1;
>+		u32 reserved:27;
>+
>+	} __attribute__ ((packed)) pd_mix_support;
>+
>+	/*
>+	 * Define ECC single-bit-error bucket information
>+	 */
>+	u8 ecc_bucket_count;
>+	u8 reserved_2[11];
>+
>+	/*
>+	 * Include the controller properties (changeable items)
>+	 */
>+	struct megasas_ctrl_prop properties;
>+
>+	/*
>+	 * Define FW pkg version (set in envt v'bles on OEM basis)
>+	 */
>+	char package_version[0x60];
>+
>+	u8 pad[0x800 - 0x6a0];
>+
>+} __attribute__ ((packed));
>+
>+/*
>+ * ===============================
>+ * MegaRAID SAS driver definitions
>+ * ===============================
>+ */
>+#define MEGASAS_MAX_PD_CHANNELS			2
>+#define MEGASAS_MAX_LD_CHANNELS			2
>+#define MEGASAS_MAX_CHANNELS			(MEGASAS_MAX_PD_CHANNELS + \
>+						MEGASAS_MAX_LD_CHANNELS)
>+#define MEGASAS_MAX_DEV_PER_CHANNEL		128
>+#define MEGASAS_DEFAULT_INIT_ID			-1
>+#define MEGASAS_MAX_LUN				8
>+#define MEGASAS_MAX_LD				64
>+
>+/*
>+ * When SCSI mid-layer calls driver's reset routine, driver waits for
>+ * MEGASAS_RESET_WAIT_TIME seconds for all outstanding IO to complete. Note
>+ * that the driver cannot _actually_ abort or reset pending commands. While
>+ * it is waiting for the commands to complete, it prints a diagnostic message
>+ * every MEGASAS_RESET_NOTICE_INTERVAL seconds
>+ */
>+#define MEGASAS_RESET_WAIT_TIME			180
>+#define	MEGASAS_RESET_NOTICE_INTERVAL		5
>+
>+#define MEGASAS_IOCTL_CMD			0
>+
>+/*
>+ * FW reports the maximum of number of commands that it can accept (maximum
>+ * commands that can be outstanding) at any time. The driver must report a
>+ * lower number to the mid layer because it can issue a few internal commands
>+ * itself (E.g, AEN, abort cmd, IOCTLs etc). The number of commands it needs
>+ * is shown below
>+ */
>+#define MEGASAS_INT_CMDS			32
>+
>+/*
>+ * FW can accept both 32 and 64 bit SGLs. We want to allocate 32/64 bit
>+ * SGLs based on the size of dma_addr_t
>+ */
>+#define IS_DMA64				(sizeof(dma_addr_t) == 8)
>+
>+#define MFI_OB_INTR_STATUS_MASK			0x00000002
>+#define MFI_POLL_TIMEOUT_SECS			10
>+
>+#define MFI_REPLY_1078_MESSAGE_INTERRUPT	0x80000000
>+
>+/*
>+* register set for both 1068 and 1078 controllers
>+* structure extended for 1078 registers
>+*/
>+ 
>+struct megasas_register_set {
>+	u32 	reserved_0[4];			/*0000h*/
>+
>+	u32 	inbound_msg_0;			/*0010h*/
>+	u32 	inbound_msg_1;			/*0014h*/
>+	u32 	outbound_msg_0;			/*0018h*/
>+	u32 	outbound_msg_1;			/*001Ch*/
>+
>+	u32 	inbound_doorbell;		/*0020h*/
>+	u32 	inbound_intr_status;		/*0024h*/
>+	u32 	inbound_intr_mask;		/*0028h*/
>+
>+	u32 	outbound_doorbell;		/*002Ch*/
>+	u32 	outbound_intr_status;		/*0030h*/
>+	u32 	outbound_intr_mask;		/*0034h*/
>+
>+	u32 	reserved_1[2];			/*0038h*/
>+
>+	u32 	inbound_queue_port;		/*0040h*/
>+	u32 	outbound_queue_port;		/*0044h*/
>+
>+	u32 	reserved_2[22];			/*0048h*/
>+
>+	u32 	outbound_doorbell_clear;	/*00A0h*/
>+
>+	u32 	reserved_3[3];			/*00A4h*/
>+
>+	u32 	outbound_scratch_pad ;		/*00B0h*/
>+
>+	u32 	reserved_4[3];			/*00B4h*/
>+
>+	u32 	inbound_low_queue_port ;	/*00C0h*/
>+
>+	u32 	inbound_high_queue_port ;	/*00C4h*/
>+
>+	u32 	reserved_5;			/*00C8h*/
>+	u32 	index_registers[820];		/*00CCh*/
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_sge32 {
>+
>+	u32 phys_addr;
>+	u32 length;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_sge64 {
>+
>+	u64 phys_addr;
>+	u32 length;
>+
>+} __attribute__ ((packed));
>+
>+union megasas_sgl {
>+
>+	struct megasas_sge32 sge32[1];
>+	struct megasas_sge64 sge64[1];
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_header {
>+
>+	u8 cmd;			/*00h */
>+	u8 sense_len;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 scsi_status;		/*03h */
>+
>+	u8 target_id;		/*04h */
>+	u8 lun;			/*05h */
>+	u8 cdb_len;		/*06h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+	u32 data_xferlen;	/*14h */
>+
>+} __attribute__ ((packed));
>+
>+union megasas_sgl_frame {
>+
>+	struct megasas_sge32 sge32[8];
>+	struct megasas_sge64 sge64[5];
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_init_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 reserved_0;		/*01h */
>+	u8 cmd_status;		/*02h */
>+
>+	u8 reserved_1;		/*03h */
>+	u32 reserved_2;		/*04h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 reserved_3;		/*12h */
>+	u32 data_xfer_len;	/*14h */
>+
>+	u32 queue_info_new_phys_addr_lo;	/*18h */
>+	u32 queue_info_new_phys_addr_hi;	/*1Ch */
>+	u32 queue_info_old_phys_addr_lo;	/*20h */
>+	u32 queue_info_old_phys_addr_hi;	/*24h */
>+
>+	u32 reserved_4[6];	/*28h */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_init_queue_info {
>+
>+	u32 init_flags;		/*00h */
>+	u32 reply_queue_entries;	/*04h */
>+
>+	u32 reply_queue_start_phys_addr_lo;	/*08h */
>+	u32 reply_queue_start_phys_addr_hi;	/*0Ch */
>+	u32 producer_index_phys_addr_lo;	/*10h */
>+	u32 producer_index_phys_addr_hi;	/*14h */
>+	u32 consumer_index_phys_addr_lo;	/*18h */
>+	u32 consumer_index_phys_addr_hi;	/*1Ch */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_io_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 sense_len;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 scsi_status;		/*03h */
>+
>+	u8 target_id;		/*04h */
>+	u8 access_byte;		/*05h */
>+	u8 reserved_0;		/*06h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+	u32 lba_count;		/*14h */
>+
>+	u32 sense_buf_phys_addr_lo;	/*18h */
>+	u32 sense_buf_phys_addr_hi;	/*1Ch */
>+
>+	u32 start_lba_lo;	/*20h */
>+	u32 start_lba_hi;	/*24h */
>+
>+	union megasas_sgl sgl;	/*28h */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_pthru_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 sense_len;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 scsi_status;		/*03h */
>+
>+	u8 target_id;		/*04h */
>+	u8 lun;			/*05h */
>+	u8 cdb_len;		/*06h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+	u32 data_xfer_len;	/*14h */
>+
>+	u32 sense_buf_phys_addr_lo;	/*18h */
>+	u32 sense_buf_phys_addr_hi;	/*1Ch */
>+
>+	u8 cdb[16];		/*20h */
>+	union megasas_sgl sgl;	/*30h */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_dcmd_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 reserved_0;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 reserved_1[4];	/*03h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+
>+	u32 data_xfer_len;	/*14h */
>+	u32 opcode;		/*18h */
>+
>+	union {			/*1Ch */
>+		u8 b[12];
>+		u16 s[6];
>+		u32 w[3];
>+	} mbox;
>+
>+	union megasas_sgl sgl;	/*28h */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_abort_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 reserved_0;		/*01h */
>+	u8 cmd_status;		/*02h */
>+
>+	u8 reserved_1;		/*03h */
>+	u32 reserved_2;		/*04h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 reserved_3;		/*12h */
>+	u32 reserved_4;		/*14h */
>+
>+	u32 abort_context;	/*18h */
>+	u32 pad_1;		/*1Ch */
>+
>+	u32 abort_mfi_phys_addr_lo;	/*20h */
>+	u32 abort_mfi_phys_addr_hi;	/*24h */
>+
>+	u32 reserved_5[6];	/*28h */
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_smp_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 reserved_1;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 connection_status;	/*03h */
>+
>+	u8 reserved_2[3];	/*04h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+
>+	u32 data_xfer_len;	/*14h */
>+	u64 sas_addr;		/*18h */
>+
>+	union {
>+		struct megasas_sge32 sge32[2];	/* [0]: resp [1]: req */
>+		struct megasas_sge64 sge64[2];	/* [0]: resp [1]: req */
>+	} sgl;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_stp_frame {
>+
>+	u8 cmd;			/*00h */
>+	u8 reserved_1;		/*01h */
>+	u8 cmd_status;		/*02h */
>+	u8 reserved_2;		/*03h */
>+
>+	u8 target_id;		/*04h */
>+	u8 reserved_3[2];	/*05h */
>+	u8 sge_count;		/*07h */
>+
>+	u32 context;		/*08h */
>+	u32 pad_0;		/*0Ch */
>+
>+	u16 flags;		/*10h */
>+	u16 timeout;		/*12h */
>+
>+	u32 data_xfer_len;	/*14h */
>+
>+	u16 fis[10];		/*18h */
>+	u32 stp_flags;
>+
>+	union {
>+		struct megasas_sge32 sge32[2];	/* [0]: resp [1]: data */
>+		struct megasas_sge64 sge64[2];	/* [0]: resp [1]: data */
>+	} sgl;
>+
>+} __attribute__ ((packed));
>+
>+union megasas_frame {
>+
>+	struct megasas_header hdr;
>+	struct megasas_init_frame init;
>+	struct megasas_io_frame io;
>+	struct megasas_pthru_frame pthru;
>+	struct megasas_dcmd_frame dcmd;
>+	struct megasas_abort_frame abort;
>+	struct megasas_smp_frame smp;
>+	struct megasas_stp_frame stp;
>+
>+	u8 raw_bytes[64];
>+};
>+
>+struct megasas_cmd;
>+
>+union megasas_evt_class_locale {
>+
>+	struct {
>+		u16 locale;
>+		u8 reserved;
>+		s8 class;
>+	} __attribute__ ((packed)) members;
>+
>+	u32 word;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_evt_log_info {
>+	u32 newest_seq_num;
>+	u32 oldest_seq_num;
>+	u32 clear_seq_num;
>+	u32 shutdown_seq_num;
>+	u32 boot_seq_num;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_progress {
>+
>+	u16 progress;
>+	u16 elapsed_seconds;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_evtarg_ld {
>+
>+	u16 target_id;
>+	u8 ld_index;
>+	u8 reserved;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_evtarg_pd {
>+	u16 device_id;
>+	u8 encl_index;
>+	u8 slot_number;
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_evt_detail {
>+
>+	u32 seq_num;
>+	u32 time_stamp;
>+	u32 code;
>+	union megasas_evt_class_locale cl;
>+	u8 arg_type;
>+	u8 reserved1[15];
>+
>+	union {
>+		struct {
>+			struct megasas_evtarg_pd pd;
>+			u8 cdb_length;
>+			u8 sense_length;
>+			u8 reserved[2];
>+			u8 cdb[16];
>+			u8 sense[64];
>+		} __attribute__ ((packed)) cdbSense;
>+
>+		struct megasas_evtarg_ld ld;
>+
>+		struct {
>+			struct megasas_evtarg_ld ld;
>+			u64 count;
>+		} __attribute__ ((packed)) ld_count;
>+
>+		struct {
>+			u64 lba;
>+			struct megasas_evtarg_ld ld;
>+		} __attribute__ ((packed)) ld_lba;
>+
>+		struct {
>+			struct megasas_evtarg_ld ld;
>+			u32 prevOwner;
>+			u32 newOwner;
>+		} __attribute__ ((packed)) ld_owner;
>+
>+		struct {
>+			u64 ld_lba;
>+			u64 pd_lba;
>+			struct megasas_evtarg_ld ld;
>+			struct megasas_evtarg_pd pd;
>+		} __attribute__ ((packed)) ld_lba_pd_lba;
>+
>+		struct {
>+			struct megasas_evtarg_ld ld;
>+			struct megasas_progress prog;
>+		} __attribute__ ((packed)) ld_prog;
>+
>+		struct {
>+			struct megasas_evtarg_ld ld;
>+			u32 prev_state;
>+			u32 new_state;
>+		} __attribute__ ((packed)) ld_state;
>+
>+		struct {
>+			u64 strip;
>+			struct megasas_evtarg_ld ld;
>+		} __attribute__ ((packed)) ld_strip;
>+
>+		struct megasas_evtarg_pd pd;
>+
>+		struct {
>+			struct megasas_evtarg_pd pd;
>+			u32 err;
>+		} __attribute__ ((packed)) pd_err;
>+
>+		struct {
>+			u64 lba;
>+			struct megasas_evtarg_pd pd;
>+		} __attribute__ ((packed)) pd_lba;
>+
>+		struct {
>+			u64 lba;
>+			struct megasas_evtarg_pd pd;
>+			struct megasas_evtarg_ld ld;
>+		} __attribute__ ((packed)) pd_lba_ld;
>+
>+		struct {
>+			struct megasas_evtarg_pd pd;
>+			struct megasas_progress prog;
>+		} __attribute__ ((packed)) pd_prog;
>+
>+		struct {
>+			struct megasas_evtarg_pd pd;
>+			u32 prevState;
>+			u32 newState;
>+		} __attribute__ ((packed)) pd_state;
>+
>+		struct {
>+			u16 vendorId;
>+			u16 deviceId;
>+			u16 subVendorId;
>+			u16 subDeviceId;
>+		} __attribute__ ((packed)) pci;
>+
>+		u32 rate;
>+		char str[96];
>+
>+		struct {
>+			u32 rtc;
>+			u32 elapsedSeconds;
>+		} __attribute__ ((packed)) time;
>+
>+		struct {
>+			u32 ecar;
>+			u32 elog;
>+			char str[64];
>+		} __attribute__ ((packed)) ecc;
>+
>+		u8 b[96];
>+		u16 s[48];
>+		u32 w[24];
>+		u64 d[12];
>+	} args;
>+
>+	char description[128];
>+
>+} __attribute__ ((packed));
>+
>+ struct megasas_instance_template {
>+	void (*fire_cmd)(dma_addr_t ,u32 ,struct megasas_register_set __iomem *);
>+
>+	void (*enable_intr)(struct megasas_register_set __iomem *) ;
>+
>+	int (*clear_intr)(struct megasas_register_set __iomem *);
>+
>+	u32 (*read_fw_status_reg)(struct megasas_register_set __iomem *);
>+ };
>+
>+struct megasas_instance {
>+
>+	u32 *producer;
>+	dma_addr_t producer_h;
>+	u32 *consumer;
>+	dma_addr_t consumer_h;
>+
>+	u32 *reply_queue;
>+	dma_addr_t reply_queue_h;
>+
>+	unsigned long base_addr;
>+	struct megasas_register_set __iomem *reg_set;
>+
>+	s8 init_id;
>+	u8 reserved[3];
>+
>+	u16 max_num_sge;
>+	u16 max_fw_cmds;
>+	u32 max_sectors_per_req;
>+
>+	struct megasas_cmd **cmd_list;
>+	struct list_head cmd_pool;
>+	spinlock_t cmd_pool_lock;
>+	struct dma_pool *frame_dma_pool;
>+	struct dma_pool *sense_dma_pool;
>+
>+	struct megasas_evt_detail *evt_detail;
>+	dma_addr_t evt_detail_h;
>+	struct megasas_cmd *aen_cmd;
>+	struct semaphore aen_mutex;
>+	struct semaphore ioctl_sem;
>+
>+	struct Scsi_Host *host;
>+
>+	wait_queue_head_t int_cmd_wait_q;
>+	wait_queue_head_t abort_cmd_wait_q;
>+
>+	struct pci_dev *pdev;
>+	u32 unique_id;
>+
>+	atomic_t fw_outstanding;
>+	u32 hw_crit_error;
>+
>+	struct megasas_instance_template *instancet;
>+};
>+
>+#define MEGASAS_IS_LOGICAL(scp)						\
>+	(scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1
>+
>+#define MEGASAS_DEV_INDEX(inst, scp)					\
>+	((scp->device->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + 	\
>+	scp->device->id
>+
>+struct megasas_cmd {
>+
>+	union megasas_frame *frame;
>+	dma_addr_t frame_phys_addr;
>+	u8 *sense;
>+	dma_addr_t sense_phys_addr;
>+
>+	u32 index;
>+	u8 sync_cmd;
>+	u8 cmd_status;
>+	u16 abort_aen;
>+
>+	struct list_head list;
>+	struct scsi_cmnd *scmd;
>+	struct megasas_instance *instance;
>+	u32 frame_count;
>+};
>+
>+#define MAX_MGMT_ADAPTERS		1024
>+#define MAX_IOCTL_SGE			16
>+
>+struct megasas_iocpacket {
>+
>+	u16 host_no;
>+	u16 __pad1;
>+	u32 sgl_off;
>+	u32 sge_count;
>+	u32 sense_off;
>+	u32 sense_len;
>+	union {
>+		u8 raw[128];
>+		struct megasas_header hdr;
>+	} frame;
>+
>+	struct iovec sgl[MAX_IOCTL_SGE];
>+
>+} __attribute__ ((packed));
>+
>+struct megasas_aen {
>+	u16 host_no;
>+	u16 __pad1;
>+	u32 seq_num;
>+	u32 class_locale_word;
>+} __attribute__ ((packed));
>+
>+#ifdef CONFIG_COMPAT
>+struct compat_megasas_iocpacket {
>+	u16 host_no;
>+	u16 __pad1;
>+	u32 sgl_off;
>+	u32 sge_count;
>+	u32 sense_off;
>+	u32 sense_len;
>+	union {
>+		u8 raw[128];
>+		struct megasas_header hdr;
>+	} frame;
>+	struct compat_iovec sgl[MAX_IOCTL_SGE];
>+} __attribute__ ((packed));
>+
>+#define MEGASAS_IOC_FIRMWARE32	_IOWR('M', 1, struct compat_megasas_iocpacket)
>+#endif
>+
>+#define MEGASAS_IOC_FIRMWARE	_IOWR('M', 1, struct megasas_iocpacket)
>+#define MEGASAS_IOC_GET_AEN	_IOW('M', 3, struct megasas_aen)
>+
>+struct megasas_mgmt_info {
>+
>+	u16 count;
>+	struct megasas_instance *instance[MAX_MGMT_ADAPTERS];
>+	int max_index;
>+};
>+
>+#endif				/*LSI_MEGARAID_SAS_H */
>--- linux-2.6.9/drivers/scsi/megaraid/Kconfig.megaraid.megaraid_sas	2007-02-28 09:48:27.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/Kconfig.megaraid	2007-02-28 10:12:08.000000000 +0200
>@@ -76,3 +76,12 @@
> 	To compile this driver as a module, choose M here: the
> 	module will be called megaraid
> endif
>+
>+config MEGARAID_SAS
>+	tristate "LSI Logic MegaRAID SAS RAID Module"
>+	depends on PCI && SCSI
>+	help
>+	Module for LSI Logic's SAS based RAID controllers.
>+	To compile this driver as a module, choose 'm' here.
>+	Module will be called megaraid_sas
>+
>--- linux-2.6.9/drivers/scsi/megaraid/Makefile.megaraid_sas	2004-10-19 00:55:07.000000000 +0300
>+++ linux-2.6.9/drivers/scsi/megaraid/Makefile	2007-02-28 10:12:58.000000000 +0200
>@@ -1,2 +1,3 @@
> obj-$(CONFIG_MEGARAID_MM)	+= megaraid_mm.o
> obj-$(CONFIG_MEGARAID_MAILBOX)	+= megaraid_mbox.o
>+obj-$(CONFIG_MEGARAID_SAS)	+= megaraid_sas.o
>--- linux-2.6.9/drivers/scsi/Makefile.megaraid_sas	2007-02-28 09:48:27.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/Makefile	2007-02-28 10:09:16.000000000 +0200
>@@ -98,6 +98,7 @@
> obj-$(CONFIG_SCSI_DC390T)	+= tmscsim.o
> obj-$(CONFIG_MEGARAID_LEGACY)	+= megaraid.o
> obj-$(CONFIG_MEGARAID_NEWGEN)	+= megaraid/
>+obj-$(CONFIG_MEGARAID_SAS)	+= megaraid/
> obj-$(CONFIG_SCSI_ACARD)	+= atp870u.o
> obj-$(CONFIG_SCSI_SUNESP)	+= esp.o
> obj-$(CONFIG_SCSI_GDTH)		+= gdth.o
>--- linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.h.megaraid_sas_rhel4	2007-02-28 10:17:39.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.h	2007-02-28 10:23:53.000000000 +0200
>@@ -27,6 +27,8 @@
>  */
> #define	PCI_DEVICE_ID_LSI_SAS1078R		0x0060
> #define	PCI_DEVICE_ID_LSI_VERDE_ZCR		0x0413
>+#define	PCI_DEVICE_ID_LSI_SAS1064R		0x0411
>+#define	PCI_DEVICE_ID_DELL_PERC5		0x0015
> 
> /*
>  * =====================================
>@@ -566,7 +568,7 @@
> * register set for both 1068 and 1078 controllers
> * structure extended for 1078 registers
> */
>- 
>+
> struct megasas_register_set {
> 	u32 	reserved_0[4];			/*0000h*/
> 
>--- linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c.megaraid_sas_rhel4	2007-02-28 10:17:39.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c	2007-02-28 10:23:53.000000000 +0200
>@@ -9,7 +9,7 @@
>  *	   as published by the Free Software Foundation; either version
>  *	   2 of the License, or (at your option) any later version.
>  *
>- * FILE		: megaraid_sas.c
>+ * FILE		: megaraid_sas.c 
>  * Version	: v03.01
>  *
>  * Authors:
>@@ -26,6 +26,7 @@
> #include <linux/types.h>
> #include <linux/pci.h>
> #include <linux/list.h>
>+#include <linux/version.h>
> #include <linux/moduleparam.h>
> #include <linux/module.h>
> #include <linux/spinlock.h>
>@@ -34,8 +35,8 @@
> #include <linux/uio.h>
> #include <asm/uaccess.h>
> #include <linux/fs.h>
>+#include <linux/ioctl32.h>
> #include <linux/compat.h>
>-#include <linux/mutex.h>
> 
> #include <scsi/scsi.h>
> #include <scsi/scsi_cmnd.h>
>@@ -85,7 +86,7 @@
> static int megasas_mgmt_majorno;
> static struct megasas_mgmt_info megasas_mgmt_info;
> static struct fasync_struct *megasas_async_queue;
>-static DEFINE_MUTEX(megasas_async_queue_mutex);
>+static DECLARE_MUTEX(megasas_async_queue_mutex);
> 
> /**
>  * megasas_get_cmd -	Get a command from the free pool
>@@ -93,7 +94,7 @@
>  *
>  * Returns a free command from the pool
>  */
>-static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
>+static inline struct megasas_cmd *megasas_get_cmd(struct megasas_instance
> 						  *instance)
> {
> 	unsigned long flags;
>@@ -131,7 +132,6 @@
> 	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
> }
> 
>-
> /**
> *	The following functions are defined for xscale 
> *	(deviceid : 1064R, PERC5) controllers
>@@ -304,7 +304,7 @@
> 
> 	if(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078R)	
> 		mask = 0xffffffff; 
>-
>+ 
> 	writel(mask, &regs->outbound_intr_mask);
> 
> 	/* Dummy readl to force pci flush */
>@@ -329,7 +329,7 @@
> 	frame_hdr->cmd_status = 0xFF;
> 	frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
> 
>-	/*
>+	/**
> 	 * Issue the frame using inbound queue port
> 	 */
> 	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
>@@ -425,7 +425,7 @@
>  * If successful, this function returns the number of SG elements. Otherwise,
>  * it returnes -1.
>  */
>-static int
>+static inline int
> megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
> 		   union megasas_sgl *mfi_sgl)
> {
>@@ -473,7 +473,7 @@
>  * If successful, this function returns the number of SG elements. Otherwise,
>  * it returnes -1.
>  */
>-static int
>+static inline int
> megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
> 		   union megasas_sgl *mfi_sgl)
> {
>@@ -522,7 +522,7 @@
>  * This function prepares CDB commands. These are typcially pass-through
>  * commands to the devices.
>  */
>-static int
>+static inline int
> megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
> 		   struct megasas_cmd *cmd)
> {
>@@ -603,7 +603,7 @@
>  *
>  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
>  */
>-static int
>+static inline int
> megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
> 		   struct megasas_cmd *cmd)
> {
>@@ -852,8 +852,9 @@
> 
> 	instance = (struct megasas_instance *)scmd->device->host->hostdata;
> 
>-	scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
>-	       scmd->serial_number, scmd->cmnd[0]);
>+	printk(KERN_NOTICE "megasas: RESET -%ld cmd=%x <c=%d t=%d l=%d>\n",
>+	       scmd->serial_number, scmd->cmnd[0], scmd->device->channel,
>+	       scmd->device->id, scmd->device->lun);
> 
> 	if (instance->hw_crit_error) {
> 		printk(KERN_ERR "megasas: cannot recover from previous reset "
>@@ -861,12 +862,17 @@
> 		return FAILED;
> 	}
> 
>+	spin_unlock(scmd->device->host->host_lock);
>+
> 	ret_val = megasas_wait_for_outstanding(instance);
>+
> 	if (ret_val == SUCCESS)
> 		printk(KERN_NOTICE "megasas: reset successful \n");
> 	else
> 		printk(KERN_ERR "megasas: failed to do reset\n");
> 
>+	spin_lock(scmd->device->host->host_lock);
>+
> 	return ret_val;
> }
> 
>@@ -930,15 +936,6 @@
> static int megasas_slave_configure(struct scsi_device *sdev)
> {
> 	/*
>-	 * Don't export physical disk devices to the disk driver.
>-	 *
>-	 * FIXME: Currently we don't export them to the midlayer at all.
>-	 * 	  That will be fixed once LSI engineers have audited the
>-	 * 	  firmware for possible issues.
>-	 */
>-	if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
>-		return -ENXIO;
>-	/*
> 	* The RAID firmware may require extended timeouts
> 	*/
> 	if(sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
>@@ -1010,7 +1007,7 @@
>  * @instance:			Adapter soft state
>  * @cmd:			Completed command
>  */
>-static void
>+static inline void
> megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
> {
> 	dma_addr_t buf_h;
>@@ -1054,7 +1051,7 @@
>  * 				an alternate status (as in the case of aborted
>  * 				commands)
>  */
>-static void
>+static inline void
> megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
> 		     u8 alt_status)
> {
>@@ -1077,6 +1074,20 @@
> 			break;
> 		}
> 
>+		/*
>+		 * Don't export physical disk devices to mid-layer.
>+		 */
>+		if (!MEGASAS_IS_LOGICAL(cmd->scmd) &&
>+		    (hdr->cmd_status == MFI_STAT_OK) &&
>+		    (cmd->scmd->cmnd[0] == INQUIRY)) {
>+
>+			if (((*(u8 *) cmd->scmd->request_buffer) & 0x1F) ==
>+			    TYPE_DISK) {
>+				cmd->scmd->result = DID_BAD_TARGET << 16;
>+				exception = 1;
>+			}
>+		}
>+
> 	case MFI_CMD_LD_READ:
> 	case MFI_CMD_LD_WRITE:
> 
>@@ -1178,7 +1189,7 @@
>  * 					SCSI mid-layer instead of the status
>  * 					returned by the FW
>  */
>-static int
>+static inline int
> megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
> {
> 	u32 producer;
>@@ -1225,7 +1236,7 @@
> 
> /**
>  * megasas_transition_to_ready -	Move the FW to READY state
>- * @instance:				Adapter soft state
>+ * @reg_set:				MFI register set
>  *
>  * During the initialization, FW passes can potentially be in any one of
>  * several possible states. If the FW in operational, waiting-for-handshake
>@@ -2176,7 +2187,7 @@
> 	 * Initialize locks and queues
> 	 */
> 	INIT_LIST_HEAD(&instance->cmd_pool);
>-		
>+
> 	atomic_set(&instance->fw_outstanding,0);
> 
> 	init_waitqueue_head(&instance->int_cmd_wait_q);
>@@ -2405,9 +2416,10 @@
>  * megasas_shutdown -	Shutdown entry point
>  * @device:		Generic device structure
>  */
>-static void megasas_shutdown(struct pci_dev *pdev)
>+static void megasas_shutdown(struct device *device)
> {
>-	struct megasas_instance *instance = pci_get_drvdata(pdev);
>+	struct megasas_instance *instance = (struct megasas_instance *)
>+	    dev_get_drvdata(device);
> 	megasas_flush_cache(instance);
> }
> 
>@@ -2446,11 +2458,11 @@
> {
> 	int rc;
> 
>-	mutex_lock(&megasas_async_queue_mutex);
>+	down(&megasas_async_queue_mutex);
> 
> 	rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
> 
>-	mutex_unlock(&megasas_async_queue_mutex);
>+	up(&megasas_async_queue_mutex);
> 
> 	if (rc >= 0) {
> 		/* For sanity check when we get ioctl */
>@@ -2705,12 +2717,14 @@
> /**
>  * megasas_mgmt_ioctl -	char node ioctl entry point
>  */
>-static long
>-megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>+static int
>+megasas_mgmt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
>+		   unsigned long arg)
> {
> 	switch (cmd) {
> 	case MEGASAS_IOC_FIRMWARE:
> 		return megasas_mgmt_ioctl_fw(file, arg);
>+
> 	case MEGASAS_IOC_GET_AEN:
> 		return megasas_mgmt_ioctl_aen(file, arg);
> 	}
>@@ -2759,8 +2773,8 @@
> }
> 
> static long
>-megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
>-			  unsigned long arg)
>+megasas_mgmt_compat_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg,
>+			  struct file *file)
> {
> 	switch (cmd) {
> 	case MEGASAS_IOC_FIRMWARE32:
>@@ -2781,10 +2795,7 @@
> 	.open = megasas_mgmt_open,
> 	.release = megasas_mgmt_release,
> 	.fasync = megasas_mgmt_fasync,
>-	.unlocked_ioctl = megasas_mgmt_ioctl,
>-#ifdef CONFIG_COMPAT
>-	.compat_ioctl = megasas_mgmt_compat_ioctl,
>-#endif
>+	.ioctl = megasas_mgmt_ioctl,
> };
> 
> /*
>@@ -2796,7 +2807,9 @@
> 	.id_table = megasas_pci_table,
> 	.probe = megasas_probe_one,
> 	.remove = __devexit_p(megasas_detach_one),
>-	.shutdown = megasas_shutdown,
>+	.driver = {
>+		   .shutdown = megasas_shutdown,
>+		   }
> };
> 
> /*
>@@ -2861,6 +2874,11 @@
> 	driver_create_file(&megasas_pci_driver.driver,
> 			   &driver_attr_release_date);
> 
>+	register_ioctl32_conversion(MEGASAS_IOC_FIRMWARE32,
>+				    megasas_mgmt_compat_ioctl);
>+	register_ioctl32_conversion(MEGASAS_IOC_GET_AEN,
>+				    megasas_mgmt_compat_ioctl);
>+
> 	return rval;
> }
> 
>@@ -2869,6 +2887,9 @@
>  */
> static void __exit megasas_exit(void)
> {
>+	unregister_ioctl32_conversion(MEGASAS_IOC_FIRMWARE32);
>+	unregister_ioctl32_conversion(MEGASAS_IOC_GET_AEN);
>+
> 	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
> 	driver_remove_file(&megasas_pci_driver.driver,
> 			   &driver_attr_release_date);
>--- linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c.megaraid_sas_diskdump	2007-02-28 10:23:53.000000000 +0200
>+++ linux-2.6.9/drivers/scsi/megaraid/megaraid_sas.c	2007-02-28 10:25:50.000000000 +0200
>@@ -48,6 +48,19 @@
> MODULE_VERSION(MEGASAS_VERSION);
> MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
> MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
>+ 
>+ /*
>+ * diskdump helper function. We can't call msleep() or mdelay() while dumping.
>+ */
>+static void megasas_msleep(unsigned long ms)
>+{
>+	if(unlikely(crashdump_mode())) {
>+		for (; ms > 1000; ms -= 1000)
>+			udelay(1000);
>+		udelay(ms);
>+	} else
>+		msleep(ms);
>+}
> 
> /*
>  * PCI ID table for all supported controllers
>@@ -88,6 +101,11 @@
> static struct fasync_struct *megasas_async_queue;
> static DECLARE_MUTEX(megasas_async_queue_mutex);
> 
>+static void 
>+megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status);
>+static void megasas_flush_cache(struct megasas_instance *instance);
>+static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs);
>+
> /**
>  * megasas_get_cmd -	Get a command from the free pool
>  * @instance:		Adapter soft state
>@@ -97,7 +115,7 @@
> static inline struct megasas_cmd *megasas_get_cmd(struct megasas_instance
> 						  *instance)
> {
>-	unsigned long flags;
>+	unsigned long flags = 0;
> 	struct megasas_cmd *cmd = NULL;
> 
> 	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
>@@ -339,7 +357,7 @@
> 	 */
> 	for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
> 		rmb();
>-		msleep(1);
>+		megasas_msleep(1);
> 	}
> 
> 	if (frame_hdr->cmd_status == 0xff)
>@@ -772,6 +790,19 @@
> 	if (!cmd)
> 		return SCSI_MLQUEUE_HOST_BUSY;
> 
>+	if (MEGASAS_IS_LOGICAL(scmd)) {
>+		switch (scmd->cmnd[0]) {
>+			case SYNCHRONIZE_CACHE:
>+				if (crashdump_mode()) 
>+					megasas_flush_cache(instance);
>+			case REQUEST_SENSE:
>+			case MODE_SELECT:
>+				if (crashdump_mode()) {
>+					scmd->result = (DID_OK << 16);
>+					goto out_done;
>+				}
>+		}
>+	}
> 	/*
> 	 * Logical drive command
> 	 */
>@@ -826,7 +857,14 @@
> 			       "commands to complete\n",i,outstanding);
> 		}
> 
>-		msleep(1000);
>+		/*
>+		* In crash dump mode cannot complete cmds in interrupt context 
>+		* Complete cmds from here
>+		*/
>+		if(crashdump_mode())
>+			megasas_deplete_reply_queue(instance, DID_OK);
>+
>+		megasas_msleep(1000);
> 	}
> 
> 	if (atomic_read(&instance->fw_outstanding)) {
>@@ -943,6 +981,43 @@
> 	return 0;
> }
> 
>+/**
>+ * megasas_diskdump_sanity_check - 	Entry point for diskdump
>+ */
>+static int
>+megasas_diskdump_sanity_check(struct scsi_device *device)
>+{
>+        struct megasas_instance *instance;
>+
>+	instance = (struct megasas_instance *)device->host->hostdata;
>+
>+        if (!instance)
>+                return -ENXIO;
>+
>+        if (spin_is_locked(&instance->cmd_pool_lock)) 
>+                return -EBUSY;
>+
>+        return 0;
>+}
>+
>+/**
>+ * megasas_diskdump_poll -	Interrupts are disabled during diskdump
>+ *				so this fn is called by diskdump driver to 
>+ *				complete IO 
>+ */
>+static void
>+megasas_diskdump_poll(struct scsi_device *device)
>+{
>+        struct megasas_instance *instance;
>+
>+	instance = (struct megasas_instance *)device->host->hostdata;
>+
>+        if (!instance)
>+                return ;
>+
>+	megasas_isr(0,instance, NULL);
>+}
>+
> /*
>  * Scsi host template for megaraid_sas driver
>  */
>@@ -957,6 +1032,8 @@
> 	.eh_bus_reset_handler = megasas_reset_bus_host,
> 	.eh_host_reset_handler = megasas_reset_bus_host,
> 	.use_clustering = ENABLE_CLUSTERING,
>+	.dump_sanity_check = megasas_diskdump_sanity_check,
>+	.dump_poll = megasas_diskdump_poll,
> };
> 
> /**
>@@ -1189,7 +1266,7 @@
>  * 					SCSI mid-layer instead of the status
>  * 					returned by the FW
>  */
>-static inline int
>+static void
> megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
> {
> 	u32 producer;
>@@ -1197,13 +1274,6 @@
> 	u32 context;
> 	struct megasas_cmd *cmd;
> 
>-	/*
>-	 * Check if it is our interrupt
>-	 * Clear the interrupt 
>-	 */
>-	if(instance->instancet->clear_intr(instance->reg_set))
>-		return IRQ_NONE;
>-
> 	producer = *instance->producer;
> 	consumer = *instance->consumer;
> 
>@@ -1221,8 +1291,6 @@
> 	}
> 
> 	*instance->consumer = producer;
>-
>-	return IRQ_HANDLED;
> }
> 
> /**
>@@ -1230,8 +1298,18 @@
>  */
> static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
> {
>-	return megasas_deplete_reply_queue((struct megasas_instance *)devp,
>-					   DID_OK);
>+	struct megasas_instance *instance ;
>+	instance = (struct megasas_instance *)devp;
>+	/*
>+	 * Check if it is our interrupt
>+	 * Clear the interrupt 
>+	 */
>+	if(instance->instancet->clear_intr(instance->reg_set))
>+		return IRQ_NONE;
>+
>+	megasas_deplete_reply_queue(instance, DID_OK);
>+
>+	return IRQ_HANDLED;
> }
> 
> /**
>@@ -1333,7 +1411,7 @@
> 					MFI_STATE_MASK ;
> 
> 			if (fw_state == cur_state) {
>-				msleep(1);
>+				megasas_msleep(1);
> 			} else
> 				break;
> 		}
>@@ -2313,7 +2391,10 @@
> 	dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
> 	dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
> 
>-	megasas_issue_blocked_cmd(instance, cmd);
>+	if (crashdump_mode()) 
>+		megasas_issue_polled(instance,cmd);
>+	else
>+		megasas_issue_blocked_cmd(instance, cmd);
> 
> 	megasas_return_cmd(instance, cmd);
>

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Attachments on bug 230826: 149170