mptbase.c 178 KB
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/*
 *  linux/drivers/message/fusion/mptbase.c
 *      This is the Fusion MPT base driver which supports multiple
 *      (SCSI + LAN) specialized protocol drivers.
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 *      For use with LSI Logic PCI chip/adapter(s)
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 *      running LSI Logic Fusion MPT (Message Passing Technology) firmware.
 *
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 *  Copyright (c) 1999-2005 LSI Logic Corporation
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 *  (mailto:mpt_linux_developer@lsil.com)
 *
 */
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; version 2 of the License.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    NO WARRANTY
    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
    solely responsible for determining the appropriateness of using and
    distributing the Program and assumes all risks associated with its
    exercise of rights under this Agreement, including but not limited to
    the risks and costs of program errors, damage to or loss of data,
    programs or equipment, and unavailability or interruption of operations.

    DISCLAIMER OF LIABILITY
    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>		/* needed for in_interrupt() proto */
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#include <linux/dma-mapping.h>
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#include <asm/io.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#ifdef __sparc__
#include <asm/irq.h>			/* needed for __irq_itoa() proto */
#endif

#include "mptbase.h"

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
#define my_NAME		"Fusion MPT base driver"
#define my_VERSION	MPT_LINUX_VERSION_COMMON
#define MYNAM		"mptbase"

MODULE_AUTHOR(MODULEAUTHOR);
MODULE_DESCRIPTION(my_NAME);
MODULE_LICENSE("GPL");

/*
 *  cmd line parameters
 */
#ifdef MFCNT
static int mfcounter = 0;
#define PRINT_MF_COUNT 20000
#endif

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *  Public data...
 */
int mpt_lan_index = -1;
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static int mpt_stm_index = -1;
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static struct proc_dir_entry *mpt_proc_root_dir;
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#define WHOINIT_UNKNOWN		0xAA

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *  Private data...
 */
					/* Adapter link list */
LIST_HEAD(ioc_list);
					/* Callback lookup table */
static MPT_CALLBACK		 MptCallbacks[MPT_MAX_PROTOCOL_DRIVERS];
					/* Protocol driver class lookup table */
static int			 MptDriverClass[MPT_MAX_PROTOCOL_DRIVERS];
					/* Event handler lookup table */
static MPT_EVHANDLER		 MptEvHandlers[MPT_MAX_PROTOCOL_DRIVERS];
					/* Reset handler lookup table */
static MPT_RESETHANDLER		 MptResetHandlers[MPT_MAX_PROTOCOL_DRIVERS];
static struct mpt_pci_driver 	*MptDeviceDriverHandlers[MPT_MAX_PROTOCOL_DRIVERS];

static int	mpt_base_index = -1;
static int	last_drv_idx = -1;

static DECLARE_WAIT_QUEUE_HEAD(mpt_waitq);

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *  Forward protos...
 */
static irqreturn_t mpt_interrupt(int irq, void *bus_id, struct pt_regs *r);
static int	mpt_base_reply(MPT_ADAPTER *ioc, MPT_FRAME_HDR *req, MPT_FRAME_HDR *reply);
static int	mpt_handshake_req_reply_wait(MPT_ADAPTER *ioc, int reqBytes,
			u32 *req, int replyBytes, u16 *u16reply, int maxwait,
			int sleepFlag);
static int	mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag);
static void	mpt_detect_bound_ports(MPT_ADAPTER *ioc, struct pci_dev *pdev);
static void	mpt_adapter_disable(MPT_ADAPTER *ioc);
static void	mpt_adapter_dispose(MPT_ADAPTER *ioc);

static void	MptDisplayIocCapabilities(MPT_ADAPTER *ioc);
static int	MakeIocReady(MPT_ADAPTER *ioc, int force, int sleepFlag);
static int	GetIocFacts(MPT_ADAPTER *ioc, int sleepFlag, int reason);
static int	GetPortFacts(MPT_ADAPTER *ioc, int portnum, int sleepFlag);
static int	SendIocInit(MPT_ADAPTER *ioc, int sleepFlag);
static int	SendPortEnable(MPT_ADAPTER *ioc, int portnum, int sleepFlag);
static int	mpt_do_upload(MPT_ADAPTER *ioc, int sleepFlag);
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static int	mpt_downloadboot(MPT_ADAPTER *ioc, MpiFwHeader_t *pFwHeader, int sleepFlag);
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static int	mpt_diag_reset(MPT_ADAPTER *ioc, int ignore, int sleepFlag);
static int	KickStart(MPT_ADAPTER *ioc, int ignore, int sleepFlag);
static int	SendIocReset(MPT_ADAPTER *ioc, u8 reset_type, int sleepFlag);
static int	PrimeIocFifos(MPT_ADAPTER *ioc);
static int	WaitForDoorbellAck(MPT_ADAPTER *ioc, int howlong, int sleepFlag);
static int	WaitForDoorbellInt(MPT_ADAPTER *ioc, int howlong, int sleepFlag);
static int	WaitForDoorbellReply(MPT_ADAPTER *ioc, int howlong, int sleepFlag);
static int	GetLanConfigPages(MPT_ADAPTER *ioc);
static int	GetFcPortPage0(MPT_ADAPTER *ioc, int portnum);
static int	GetIoUnitPage2(MPT_ADAPTER *ioc);
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int		mptbase_sas_persist_operation(MPT_ADAPTER *ioc, u8 persist_opcode);
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static int	mpt_GetScsiPortSettings(MPT_ADAPTER *ioc, int portnum);
static int	mpt_readScsiDevicePageHeaders(MPT_ADAPTER *ioc, int portnum);
static void 	mpt_read_ioc_pg_1(MPT_ADAPTER *ioc);
static void 	mpt_read_ioc_pg_4(MPT_ADAPTER *ioc);
static void	mpt_timer_expired(unsigned long data);
static int	SendEventNotification(MPT_ADAPTER *ioc, u8 EvSwitch);
static int	SendEventAck(MPT_ADAPTER *ioc, EventNotificationReply_t *evnp);
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static int	mpt_host_page_access_control(MPT_ADAPTER *ioc, u8 access_control_value, int sleepFlag);
static int	mpt_host_page_alloc(MPT_ADAPTER *ioc, pIOCInit_t ioc_init);
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#ifdef CONFIG_PROC_FS
static int	procmpt_summary_read(char *buf, char **start, off_t offset,
				int request, int *eof, void *data);
static int	procmpt_version_read(char *buf, char **start, off_t offset,
				int request, int *eof, void *data);
static int	procmpt_iocinfo_read(char *buf, char **start, off_t offset,
				int request, int *eof, void *data);
#endif
static void	mpt_get_fw_exp_ver(char *buf, MPT_ADAPTER *ioc);

//int		mpt_HardResetHandler(MPT_ADAPTER *ioc, int sleepFlag);
static int	ProcessEventNotification(MPT_ADAPTER *ioc, EventNotificationReply_t *evReply, int *evHandlers);
static void	mpt_sp_ioc_info(MPT_ADAPTER *ioc, u32 ioc_status, MPT_FRAME_HDR *mf);
static void	mpt_fc_log_info(MPT_ADAPTER *ioc, u32 log_info);
static void	mpt_sp_log_info(MPT_ADAPTER *ioc, u32 log_info);
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static void	mpt_sas_log_info(MPT_ADAPTER *ioc, u32 log_info);
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/* module entry point */
static int  __init    fusion_init  (void);
static void __exit    fusion_exit  (void);

#define CHIPREG_READ32(addr) 		readl_relaxed(addr)
#define CHIPREG_READ32_dmasync(addr)	readl(addr)
#define CHIPREG_WRITE32(addr,val) 	writel(val, addr)
#define CHIPREG_PIO_WRITE32(addr,val)	outl(val, (unsigned long)addr)
#define CHIPREG_PIO_READ32(addr) 	inl((unsigned long)addr)

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static void
pci_disable_io_access(struct pci_dev *pdev)
{
	u16 command_reg;

	pci_read_config_word(pdev, PCI_COMMAND, &command_reg);
	command_reg &= ~1;
	pci_write_config_word(pdev, PCI_COMMAND, command_reg);
}

static void
pci_enable_io_access(struct pci_dev *pdev)
{
	u16 command_reg;

	pci_read_config_word(pdev, PCI_COMMAND, &command_reg);
	command_reg |= 1;
	pci_write_config_word(pdev, PCI_COMMAND, command_reg);
}

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/*
 *  Process turbo (context) reply...
 */
static void
mpt_turbo_reply(MPT_ADAPTER *ioc, u32 pa)
{
	MPT_FRAME_HDR *mf = NULL;
	MPT_FRAME_HDR *mr = NULL;
	int req_idx = 0;
	int cb_idx;

	dmfprintk((MYIOC_s_INFO_FMT "Got TURBO reply req_idx=%08x\n",
				ioc->name, pa));

	switch (pa >> MPI_CONTEXT_REPLY_TYPE_SHIFT) {
	case MPI_CONTEXT_REPLY_TYPE_SCSI_INIT:
		req_idx = pa & 0x0000FFFF;
		cb_idx = (pa & 0x00FF0000) >> 16;
		mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
		break;
	case MPI_CONTEXT_REPLY_TYPE_LAN:
		cb_idx = mpt_lan_index;
		/*
		 *  Blind set of mf to NULL here was fatal
		 *  after lan_reply says "freeme"
		 *  Fix sort of combined with an optimization here;
		 *  added explicit check for case where lan_reply
		 *  was just returning 1 and doing nothing else.
		 *  For this case skip the callback, but set up
		 *  proper mf value first here:-)
		 */
		if ((pa & 0x58000000) == 0x58000000) {
			req_idx = pa & 0x0000FFFF;
			mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
			mpt_free_msg_frame(ioc, mf);
			mb();
			return;
			break;
		}
		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
		break;
	case MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET:
		cb_idx = mpt_stm_index;
		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
		break;
	default:
		cb_idx = 0;
		BUG();
	}

	/*  Check for (valid) IO callback!  */
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
			MptCallbacks[cb_idx] == NULL) {
		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
				__FUNCTION__, ioc->name, cb_idx);
		goto out;
	}

	if (MptCallbacks[cb_idx](ioc, mf, mr))
		mpt_free_msg_frame(ioc, mf);
 out:
	mb();
}

static void
mpt_reply(MPT_ADAPTER *ioc, u32 pa)
{
	MPT_FRAME_HDR	*mf;
	MPT_FRAME_HDR	*mr;
	int		 req_idx;
	int		 cb_idx;
	int		 freeme;

	u32 reply_dma_low;
	u16 ioc_stat;

	/* non-TURBO reply!  Hmmm, something may be up...
	 *  Newest turbo reply mechanism; get address
	 *  via left shift 1 (get rid of MPI_ADDRESS_REPLY_A_BIT)!
	 */

	/* Map DMA address of reply header to cpu address.
	 * pa is 32 bits - but the dma address may be 32 or 64 bits
	 * get offset based only only the low addresses
	 */

	reply_dma_low = (pa <<= 1);
	mr = (MPT_FRAME_HDR *)((u8 *)ioc->reply_frames +
			 (reply_dma_low - ioc->reply_frames_low_dma));

	req_idx = le16_to_cpu(mr->u.frame.hwhdr.msgctxu.fld.req_idx);
	cb_idx = mr->u.frame.hwhdr.msgctxu.fld.cb_idx;
	mf = MPT_INDEX_2_MFPTR(ioc, req_idx);

	dmfprintk((MYIOC_s_INFO_FMT "Got non-TURBO reply=%p req_idx=%x cb_idx=%x Function=%x\n",
			ioc->name, mr, req_idx, cb_idx, mr->u.hdr.Function));
	DBG_DUMP_REPLY_FRAME(mr)

	 /*  Check/log IOC log info
	 */
	ioc_stat = le16_to_cpu(mr->u.reply.IOCStatus);
	if (ioc_stat & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE) {
		u32	 log_info = le32_to_cpu(mr->u.reply.IOCLogInfo);
		if (ioc->bus_type == FC)
			mpt_fc_log_info(ioc, log_info);
		else if (ioc->bus_type == SCSI)
			mpt_sp_log_info(ioc, log_info);
		else if (ioc->bus_type == SAS)
			mpt_sas_log_info(ioc, log_info);
	}
	if (ioc_stat & MPI_IOCSTATUS_MASK) {
		if (ioc->bus_type == SCSI &&
		    cb_idx != mpt_stm_index &&
		    cb_idx != mpt_lan_index)
			mpt_sp_ioc_info(ioc, (u32)ioc_stat, mf);
	}


	/*  Check for (valid) IO callback!  */
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
			MptCallbacks[cb_idx] == NULL) {
		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
				__FUNCTION__, ioc->name, cb_idx);
		freeme = 0;
		goto out;
	}

	freeme = MptCallbacks[cb_idx](ioc, mf, mr);

 out:
	/*  Flush (non-TURBO) reply with a WRITE!  */
	CHIPREG_WRITE32(&ioc->chip->ReplyFifo, pa);

	if (freeme)
		mpt_free_msg_frame(ioc, mf);
	mb();
}

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/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mpt_interrupt - MPT adapter (IOC) specific interrupt handler.
 *	@irq: irq number (not used)
 *	@bus_id: bus identifier cookie == pointer to MPT_ADAPTER structure
 *	@r: pt_regs pointer (not used)
 *
 *	This routine is registered via the request_irq() kernel API call,
 *	and handles all interrupts generated from a specific MPT adapter
 *	(also referred to as a IO Controller or IOC).
 *	This routine must clear the interrupt from the adapter and does
 *	so by reading the reply FIFO.  Multiple replies may be processed
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 *	per single call to this routine.
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 *
 *	This routine handles register-level access of the adapter but
 *	dispatches (calls) a protocol-specific callback routine to handle
 *	the protocol-specific details of the MPT request completion.
 */
static irqreturn_t
mpt_interrupt(int irq, void *bus_id, struct pt_regs *r)
{
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	MPT_ADAPTER *ioc = bus_id;
	u32 pa;
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	/*
	 *  Drain the reply FIFO!
	 */
	while (1) {
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		pa = CHIPREG_READ32_dmasync(&ioc->chip->ReplyFifo);
		if (pa == 0xFFFFFFFF)
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			return IRQ_HANDLED;
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		else if (pa & MPI_ADDRESS_REPLY_A_BIT)
			mpt_reply(ioc, pa);
		else
			mpt_turbo_reply(ioc, pa);
	}
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	return IRQ_HANDLED;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *	mpt_base_reply - MPT base driver's callback routine; all base driver
 *	"internal" request/reply processing is routed here.
 *	Currently used for EventNotification and EventAck handling.
 *	@ioc: Pointer to MPT_ADAPTER structure
 *	@mf: Pointer to original MPT request frame
 *	@reply: Pointer to MPT reply frame (NULL if TurboReply)
 *
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 *	Returns 1 indicating original alloc'd request frame ptr
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 *	should be freed, or 0 if it shouldn't.
 */
static int
mpt_base_reply(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *reply)
{
	int freereq = 1;
	u8 func;

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	dmfprintk((MYIOC_s_INFO_FMT "mpt_base_reply() called\n", ioc->name));
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#if defined(MPT_DEBUG_MSG_FRAME)
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	if (!(reply->u.hdr.MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY)) {
		dmfprintk((KERN_INFO MYNAM ": Original request frame (@%p) header\n", mf));
		DBG_DUMP_REQUEST_FRAME_HDR(mf)
	}
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#endif
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	func = reply->u.hdr.Function;
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	dmfprintk((MYIOC_s_INFO_FMT "mpt_base_reply, Function=%02Xh\n",
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			ioc->name, func));

	if (func == MPI_FUNCTION_EVENT_NOTIFICATION) {
		EventNotificationReply_t *pEvReply = (EventNotificationReply_t *) reply;
		int evHandlers = 0;
		int results;

		results = ProcessEventNotification(ioc, pEvReply, &evHandlers);
		if (results != evHandlers) {
			/* CHECKME! Any special handling needed here? */
			devtprintk((MYIOC_s_WARN_FMT "Called %d event handlers, sum results = %d\n",
					ioc->name, evHandlers, results));
		}

		/*
		 *	Hmmm...  It seems that EventNotificationReply is an exception
		 *	to the rule of one reply per request.
		 */
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		if (pEvReply->MsgFlags & MPI_MSGFLAGS_CONTINUATION_REPLY) {
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			freereq = 0;
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			devtprintk((MYIOC_s_WARN_FMT "EVENT_NOTIFICATION reply %p does not return Request frame\n",
				ioc->name, pEvReply));
		} else {
			devtprintk((MYIOC_s_WARN_FMT "EVENT_NOTIFICATION reply %p returns Request frame\n",
				ioc->name, pEvReply));
		}
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#ifdef CONFIG_PROC_FS
//		LogEvent(ioc, pEvReply);
#endif

	} else if (func == MPI_FUNCTION_EVENT_ACK) {
		dprintk((MYIOC_s_INFO_FMT "mpt_base_reply, EventAck reply received\n",
				ioc->name));
	} else if (func == MPI_FUNCTION_CONFIG ||
		   func == MPI_FUNCTION_TOOLBOX) {
		CONFIGPARMS *pCfg;
		unsigned long flags;

		dcprintk((MYIOC_s_INFO_FMT "config_complete (mf=%p,mr=%p)\n",
				ioc->name, mf, reply));

		pCfg = * ((CONFIGPARMS **)((u8 *) mf + ioc->req_sz - sizeof(void *)));

		if (pCfg) {
			/* disable timer and remove from linked list */
			del_timer(&pCfg->timer);

			spin_lock_irqsave(&ioc->FreeQlock, flags);
			list_del(&pCfg->linkage);
			spin_unlock_irqrestore(&ioc->FreeQlock, flags);

			/*
			 *	If IOC Status is SUCCESS, save the header
			 *	and set the status code to GOOD.
			 */
			pCfg->status = MPT_CONFIG_ERROR;
			if (reply) {
				ConfigReply_t	*pReply = (ConfigReply_t *)reply;
				u16		 status;

				status = le16_to_cpu(pReply->IOCStatus) & MPI_IOCSTATUS_MASK;
				dcprintk((KERN_NOTICE "  IOCStatus=%04xh, IOCLogInfo=%08xh\n",
				     status, le32_to_cpu(pReply->IOCLogInfo)));

				pCfg->status = status;
				if (status == MPI_IOCSTATUS_SUCCESS) {
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					if ((pReply->Header.PageType &
					    MPI_CONFIG_PAGETYPE_MASK) ==
					    MPI_CONFIG_PAGETYPE_EXTENDED) {
						pCfg->cfghdr.ehdr->ExtPageLength =
						    le16_to_cpu(pReply->ExtPageLength);
						pCfg->cfghdr.ehdr->ExtPageType =
						    pReply->ExtPageType;
					}
					pCfg->cfghdr.hdr->PageVersion = pReply->Header.PageVersion;

					/* If this is a regular header, save PageLength. */
					/* LMP Do this better so not using a reserved field! */
					pCfg->cfghdr.hdr->PageLength = pReply->Header.PageLength;
					pCfg->cfghdr.hdr->PageNumber = pReply->Header.PageNumber;
					pCfg->cfghdr.hdr->PageType = pReply->Header.PageType;
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				}
			}

			/*
			 *	Wake up the original calling thread
			 */
			pCfg->wait_done = 1;
			wake_up(&mpt_waitq);
		}
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	} else if (func == MPI_FUNCTION_SAS_IO_UNIT_CONTROL) {
		/* we should be always getting a reply frame */
		memcpy(ioc->persist_reply_frame, reply,
		    min(MPT_DEFAULT_FRAME_SIZE,
		    4*reply->u.reply.MsgLength));
		del_timer(&ioc->persist_timer);
		ioc->persist_wait_done = 1;
		wake_up(&mpt_waitq);
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	} else {
		printk(MYIOC_s_ERR_FMT "Unexpected msg function (=%02Xh) reply received!\n",
				ioc->name, func);
	}

	/*
	 *	Conditionally tell caller to free the original
	 *	EventNotification/EventAck/unexpected request frame!
	 */
	return freereq;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_register - Register protocol-specific main callback handler.
 *	@cbfunc: callback function pointer
 *	@dclass: Protocol driver's class (%MPT_DRIVER_CLASS enum value)
 *
 *	This routine is called by a protocol-specific driver (SCSI host,
 *	LAN, SCSI target) to register it's reply callback routine.  Each
 *	protocol-specific driver must do this before it will be able to
 *	use any IOC resources, such as obtaining request frames.
 *
 *	NOTES: The SCSI protocol driver currently calls this routine thrice
 *	in order to register separate callbacks; one for "normal" SCSI IO;
 *	one for MptScsiTaskMgmt requests; one for Scan/DV requests.
 *
 *	Returns a positive integer valued "handle" in the
 *	range (and S.O.D. order) {N,...,7,6,5,...,1} if successful.
 *	Any non-positive return value (including zero!) should be considered
 *	an error by the caller.
 */
int
mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass)
{
	int i;

	last_drv_idx = -1;

	/*
	 *  Search for empty callback slot in this order: {N,...,7,6,5,...,1}
	 *  (slot/handle 0 is reserved!)
	 */
	for (i = MPT_MAX_PROTOCOL_DRIVERS-1; i; i--) {
		if (MptCallbacks[i] == NULL) {
			MptCallbacks[i] = cbfunc;
			MptDriverClass[i] = dclass;
			MptEvHandlers[i] = NULL;
			last_drv_idx = i;
			break;
		}
	}

	return last_drv_idx;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_deregister - Deregister a protocol drivers resources.
 *	@cb_idx: previously registered callback handle
 *
 *	Each protocol-specific driver should call this routine when it's
 *	module is unloaded.
 */
void
mpt_deregister(int cb_idx)
{
	if ((cb_idx >= 0) && (cb_idx < MPT_MAX_PROTOCOL_DRIVERS)) {
		MptCallbacks[cb_idx] = NULL;
		MptDriverClass[cb_idx] = MPTUNKNOWN_DRIVER;
		MptEvHandlers[cb_idx] = NULL;

		last_drv_idx++;
	}
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_event_register - Register protocol-specific event callback
 *	handler.
 *	@cb_idx: previously registered (via mpt_register) callback handle
 *	@ev_cbfunc: callback function
 *
 *	This routine can be called by one or more protocol-specific drivers
 *	if/when they choose to be notified of MPT events.
 *
 *	Returns 0 for success.
 */
int
mpt_event_register(int cb_idx, MPT_EVHANDLER ev_cbfunc)
{
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
		return -1;

	MptEvHandlers[cb_idx] = ev_cbfunc;
	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_event_deregister - Deregister protocol-specific event callback
 *	handler.
 *	@cb_idx: previously registered callback handle
 *
 *	Each protocol-specific driver should call this routine
 *	when it does not (or can no longer) handle events,
 *	or when it's module is unloaded.
 */
void
mpt_event_deregister(int cb_idx)
{
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
		return;

	MptEvHandlers[cb_idx] = NULL;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_reset_register - Register protocol-specific IOC reset handler.
 *	@cb_idx: previously registered (via mpt_register) callback handle
 *	@reset_func: reset function
 *
 *	This routine can be called by one or more protocol-specific drivers
 *	if/when they choose to be notified of IOC resets.
 *
 *	Returns 0 for success.
 */
int
mpt_reset_register(int cb_idx, MPT_RESETHANDLER reset_func)
{
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
		return -1;

	MptResetHandlers[cb_idx] = reset_func;
	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_reset_deregister - Deregister protocol-specific IOC reset handler.
 *	@cb_idx: previously registered callback handle
 *
 *	Each protocol-specific driver should call this routine
 *	when it does not (or can no longer) handle IOC reset handling,
 *	or when it's module is unloaded.
 */
void
mpt_reset_deregister(int cb_idx)
{
	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
		return;

	MptResetHandlers[cb_idx] = NULL;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_device_driver_register - Register device driver hooks
 */
int
mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, int cb_idx)
{
	MPT_ADAPTER	*ioc;

	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS) {
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		return -EINVAL;
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	}

	MptDeviceDriverHandlers[cb_idx] = dd_cbfunc;

	/* call per pci device probe entry point */
	list_for_each_entry(ioc, &ioc_list, list) {
		if(dd_cbfunc->probe) {
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			dd_cbfunc->probe(ioc->pcidev,
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			  ioc->pcidev->driver->id_table);
  		}
	 }

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	return 0;
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}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_device_driver_deregister - DeRegister device driver hooks
 */
void
mpt_device_driver_deregister(int cb_idx)
{
	struct mpt_pci_driver *dd_cbfunc;
	MPT_ADAPTER	*ioc;

	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
		return;

	dd_cbfunc = MptDeviceDriverHandlers[cb_idx];

	list_for_each_entry(ioc, &ioc_list, list) {
		if (dd_cbfunc->remove)
			dd_cbfunc->remove(ioc->pcidev);
	}
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	MptDeviceDriverHandlers[cb_idx] = NULL;
}


/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_get_msg_frame - Obtain a MPT request frame from the pool (of 1024)
 *	allocated per MPT adapter.
 *	@handle: Handle of registered MPT protocol driver
 *	@ioc: Pointer to MPT adapter structure
 *
 *	Returns pointer to a MPT request frame or %NULL if none are available
 *	or IOC is not active.
 */
MPT_FRAME_HDR*
mpt_get_msg_frame(int handle, MPT_ADAPTER *ioc)
{
	MPT_FRAME_HDR *mf;
	unsigned long flags;
	u16	 req_idx;	/* Request index */

	/* validate handle and ioc identifier */

#ifdef MFCNT
	if (!ioc->active)
		printk(KERN_WARNING "IOC Not Active! mpt_get_msg_frame returning NULL!\n");
#endif

	/* If interrupts are not attached, do not return a request frame */
	if (!ioc->active)
		return NULL;

	spin_lock_irqsave(&ioc->FreeQlock, flags);
	if (!list_empty(&ioc->FreeQ)) {
		int req_offset;

		mf = list_entry(ioc->FreeQ.next, MPT_FRAME_HDR,
				u.frame.linkage.list);
		list_del(&mf->u.frame.linkage.list);
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		mf->u.frame.linkage.arg1 = 0;
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		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;	/* byte */
		req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
								/* u16! */
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		req_idx = req_offset / ioc->req_sz;
		mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(req_idx);
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		mf->u.frame.hwhdr.msgctxu.fld.rsvd = 0;
		ioc->RequestNB[req_idx] = ioc->NB_for_64_byte_frame; /* Default, will be changed if necessary in SG generation */
#ifdef MFCNT
		ioc->mfcnt++;
#endif
	}
	else
		mf = NULL;
	spin_unlock_irqrestore(&ioc->FreeQlock, flags);

#ifdef MFCNT
	if (mf == NULL)
		printk(KERN_WARNING "IOC Active. No free Msg Frames! Count 0x%x Max 0x%x\n", ioc->mfcnt, ioc->req_depth);
	mfcounter++;
	if (mfcounter == PRINT_MF_COUNT)
		printk(KERN_INFO "MF Count 0x%x Max 0x%x \n", ioc->mfcnt, ioc->req_depth);
#endif

	dmfprintk((KERN_INFO MYNAM ": %s: mpt_get_msg_frame(%d,%d), got mf=%p\n",
			ioc->name, handle, ioc->id, mf));
	return mf;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_put_msg_frame - Send a protocol specific MPT request frame
 *	to a IOC.
 *	@handle: Handle of registered MPT protocol driver
 *	@ioc: Pointer to MPT adapter structure
 *	@mf: Pointer to MPT request frame
 *
 *	This routine posts a MPT request frame to the request post FIFO of a
 *	specific MPT adapter.
 */
void
mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
{
	u32 mf_dma_addr;
	int req_offset;
	u16	 req_idx;	/* Request index */

	/* ensure values are reset properly! */
	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;		/* byte */
	req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
								/* u16! */
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	req_idx = req_offset / ioc->req_sz;
	mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(req_idx);
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	mf->u.frame.hwhdr.msgctxu.fld.rsvd = 0;

#ifdef MPT_DEBUG_MSG_FRAME
	{
		u32	*m = mf->u.frame.hwhdr.__hdr;
		int	 ii, n;

		printk(KERN_INFO MYNAM ": %s: About to Put msg frame @ %p:\n" KERN_INFO " ",
				ioc->name, m);
		n = ioc->req_sz/4 - 1;
		while (m[n] == 0)
			n--;
		for (ii=0; ii<=n; ii++) {
			if (ii && ((ii%8)==0))
				printk("\n" KERN_INFO " ");
			printk(" %08x", le32_to_cpu(m[ii]));
		}
		printk("\n");
	}
#endif

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	mf_dma_addr = (ioc->req_frames_low_dma + req_offset) | ioc->RequestNB[req_idx];
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	dsgprintk((MYIOC_s_INFO_FMT "mf_dma_addr=%x req_idx=%d RequestNB=%x\n", ioc->name, mf_dma_addr, req_idx, ioc->RequestNB[req_idx]));
	CHIPREG_WRITE32(&ioc->chip->RequestFifo, mf_dma_addr);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_free_msg_frame - Place MPT request frame back on FreeQ.
 *	@handle: Handle of registered MPT protocol driver
 *	@ioc: Pointer to MPT adapter structure
 *	@mf: Pointer to MPT request frame
 *
 *	This routine places a MPT request frame back on the MPT adapter's
 *	FreeQ.
 */
void
mpt_free_msg_frame(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
{
	unsigned long flags;

	/*  Put Request back on FreeQ!  */
	spin_lock_irqsave(&ioc->FreeQlock, flags);
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	mf->u.frame.linkage.arg1 = 0xdeadbeaf; /* signature to know if this mf is freed */
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	list_add_tail(&mf->u.frame.linkage.list, &ioc->FreeQ);
#ifdef MFCNT
	ioc->mfcnt--;
#endif
	spin_unlock_irqrestore(&ioc->FreeQlock, flags);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_add_sge - Place a simple SGE at address pAddr.
 *	@pAddr: virtual address for SGE
 *	@flagslength: SGE flags and data transfer length
 *	@dma_addr: Physical address
 *
 *	This routine places a MPT request frame back on the MPT adapter's
 *	FreeQ.
 */
void
mpt_add_sge(char *pAddr, u32 flagslength, dma_addr_t dma_addr)
{
	if (sizeof(dma_addr_t) == sizeof(u64)) {
		SGESimple64_t *pSge = (SGESimple64_t *) pAddr;
		u32 tmp = dma_addr & 0xFFFFFFFF;

		pSge->FlagsLength = cpu_to_le32(flagslength);
		pSge->Address.Low = cpu_to_le32(tmp);
		tmp = (u32) ((u64)dma_addr >> 32);
		pSge->Address.High = cpu_to_le32(tmp);

	} else {
		SGESimple32_t *pSge = (SGESimple32_t *) pAddr;
		pSge->FlagsLength = cpu_to_le32(flagslength);
		pSge->Address = cpu_to_le32(dma_addr);
	}
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 *	mpt_send_handshake_request - Send MPT request via doorbell
 *	handshake method.
 *	@handle: Handle of registered MPT protocol driver
 *	@ioc: Pointer to MPT adapter structure
 *	@reqBytes: Size of the request in bytes
 *	@req: Pointer to MPT request frame
 *	@sleepFlag: Use schedule if CAN_SLEEP else use udelay.
 *
 *	This routine is used exclusively to send MptScsiTaskMgmt
 *	requests since they are required to be sent via doorbell handshake.
 *
 *	NOTE: It is the callers responsibility to byte-swap fields in the
 *	request which are greater than 1 byte in size.
 *
 *	Returns 0 for success, non-zero for failure.
 */
int
mpt_send_handshake_request(int handle, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag)
{
	int		 r = 0;
	u8	*req_as_bytes;
	int	 ii;

	/* State is known to be good upon entering
	 * this function so issue the bus reset
	 * request.
	 */

	/*
	 * Emulate what mpt_put_msg_frame() does /wrt to sanity
	 * setting cb_idx/req_idx.  But ONLY if this request
	 * is in proper (pre-alloc'd) request buffer range...
	 */
	ii = MFPTR_2_MPT_INDEX(ioc,(MPT_FRAME_HDR*)req);
	if (reqBytes >= 12 && ii >= 0 && ii < ioc->req_depth) {
		MPT_FRAME_HDR *mf = (MPT_FRAME_HDR*)req;
		mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(ii);
		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;
	}

	/* Make sure there are no doorbells */
	CHIPREG_WRITE32(&ioc->chip->IntStatus, 0);
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	CHIPREG_WRITE32(&ioc->chip->Doorbell,
			((MPI_FUNCTION_HANDSHAKE<<MPI_DOORBELL_FUNCTION_SHIFT) |
			 ((reqBytes/4)<<MPI_DOORBELL_ADD_DWORDS_SHIFT)));

	/* Wait for IOC doorbell int */
	if ((ii = WaitForDoorbellInt(ioc, 5, sleepFlag)) < 0) {
		return ii;
	}

	/* Read doorbell and check for active bit */
	if (!(CHIPREG_READ32(&ioc->chip->Doorbell) & MPI_DOORBELL_ACTIVE))
		return -5;

	dhsprintk((KERN_INFO MYNAM ": %s: mpt_send_handshake_request start, WaitCnt=%d\n",
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		ioc->name, ii));
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	CHIPREG_WRITE32(&ioc->chip->IntStatus, 0);

	if ((r = WaitForDoorbellAck(ioc, 5, sleepFlag)) < 0) {
		return -2;
	}
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	/* Send request via doorbell handshake */
	req_as_bytes = (u8 *) req;
	for (ii = 0; ii < reqBytes/4; ii++) {
		u32 word;

		word = ((req_as_bytes[(ii*4) + 0] <<  0) |
			(req_as_bytes[(ii*4) + 1] <<  8) |
			(req_as_bytes[(ii*4) + 2] << 16) |
			(req_as_bytes[(ii*4) + 3] << 24));
		CHIPREG_WRITE32(&ioc->chip->Doorbell, word);
		if ((r = WaitForDoorbellAck(ioc, 5, sleepFlag)) < 0) {
			r = -3;
			break;
		}
	}

	if (r >= 0 && WaitForDoorbellInt(ioc, 10, sleepFlag) >= 0)
		r = 0;
	else
		r = -4;

	/* Make sure there are no doorbells */
	CHIPREG_WRITE32(&ioc->chip->IntStatus, 0);
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	return r;
}

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/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
 * mpt_host_page_access_control - provides mechanism for the host
 * driver to control the IOC's Host Page Buffer access.
 * @ioc: Pointer to MPT adapter structure
 * @access_control_value: define bits below
 *
 * Access Control Value - bits[15:12]
 * 0h Reserved
 * 1h Enable Access { MPI_DB_HPBAC_ENABLE_ACCESS }
 * 2h Disable Access { MPI_DB_HPBAC_DISABLE_ACCESS }
 * 3h Free Buffer { MPI_DB_HPBAC_FREE_BUFFER }
 *
 * Returns 0 for success, non-zero for failure.
 */

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