lpfc.h

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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2007 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <scsi/scsi_host.h>

struct lpfc_sli2_slim;

#define LPFC_MAX_TARGET		256	/* max number of targets supported */
#define LPFC_MAX_DISC_THREADS	64	/* max outstanding discovery els
					   requests */
#define LPFC_MAX_NS_RETRY	3	/* Number of retry attempts to contact
					   the NameServer  before giving up. */
#define LPFC_CMD_PER_LUN	3	/* max outstanding cmds per lun */
#define LPFC_SG_SEG_CNT		64	/* sg element count per scsi cmnd */
#define LPFC_IOCB_LIST_CNT	2250	/* list of IOCBs for fast-path usage. */
#define LPFC_Q_RAMP_UP_INTERVAL 120     /* lun q_depth ramp up interval */

/*
 * Following time intervals are used of adjusting SCSI device
 * queue depths when there are driver resource error or Firmware
 * resource error.
 */
#define QUEUE_RAMP_DOWN_INTERVAL	(1 * HZ)   /* 1 Second */
#define QUEUE_RAMP_UP_INTERVAL		(300 * HZ) /* 5 minutes */

/* Number of exchanges reserved for discovery to complete */
#define LPFC_DISC_IOCB_BUFF_COUNT 20

#define LPFC_HB_MBOX_INTERVAL   5	/* Heart beat interval in seconds. */
#define LPFC_HB_MBOX_TIMEOUT    30	/* Heart beat timeout  in seconds. */

/* Define macros for 64 bit support */
#define putPaddrLow(addr)    ((uint32_t) (0xffffffff & (u64)(addr)))
#define putPaddrHigh(addr)   ((uint32_t) (0xffffffff & (((u64)(addr))>>32)))
#define getPaddr(high, low)  ((dma_addr_t)( \
			     (( (u64)(high)<<16 ) << 16)|( (u64)(low))))
/* Provide maximum configuration definitions. */
#define LPFC_DRVR_TIMEOUT	16	/* driver iocb timeout value in sec */
#define FC_MAX_ADPTMSG		64

#define MAX_HBAEVT	32

enum lpfc_polling_flags {
	ENABLE_FCP_RING_POLLING = 0x1,
	DISABLE_FCP_RING_INT    = 0x2
};

/* Provide DMA memory definitions the driver uses per port instance. */
struct lpfc_dmabuf {
	struct list_head list;
	void *virt;		/* virtual address ptr */
	dma_addr_t phys;	/* mapped address */
};

struct lpfc_dma_pool {
	struct lpfc_dmabuf   *elements;
	uint32_t    max_count;
	uint32_t    current_count;
};

struct hbq_dmabuf {
	struct lpfc_dmabuf dbuf;
	uint32_t size;
	uint32_t tag;
};

/* Priority bit.  Set value to exceed low water mark in lpfc_mem. */
#define MEM_PRI		0x100


/****************************************************************************/
/*      Device VPD save area                                                */
/****************************************************************************/
typedef struct lpfc_vpd {
	uint32_t status;	/* vpd status value */
	uint32_t length;	/* number of bytes actually returned */
	struct {
		uint32_t rsvd1;	/* Revision numbers */
		uint32_t biuRev;
		uint32_t smRev;
		uint32_t smFwRev;
		uint32_t endecRev;
		uint16_t rBit;
		uint8_t fcphHigh;
		uint8_t fcphLow;
		uint8_t feaLevelHigh;
		uint8_t feaLevelLow;
		uint32_t postKernRev;
		uint32_t opFwRev;
		uint8_t opFwName[16];
		uint32_t sli1FwRev;
		uint8_t sli1FwName[16];
		uint32_t sli2FwRev;
		uint8_t sli2FwName[16];
	} rev;
	struct {
#ifdef __BIG_ENDIAN_BITFIELD
		uint32_t rsvd2  :24;  /* Reserved                             */
		uint32_t cmv	: 1;  /* Configure Max VPIs                   */
		uint32_t ccrp   : 1;  /* Config Command Ring Polling          */
		uint32_t csah   : 1;  /* Configure Synchronous Abort Handling */
		uint32_t chbs   : 1;  /* Cofigure Host Backing store          */
		uint32_t cinb   : 1;  /* Enable Interrupt Notification Block  */
		uint32_t cerbm	: 1;  /* Configure Enhanced Receive Buf Mgmt  */
		uint32_t cmx	: 1;  /* Configure Max XRIs                   */
		uint32_t cmr	: 1;  /* Configure Max RPIs                   */
#else	/*  __LITTLE_ENDIAN */
		uint32_t cmr	: 1;  /* Configure Max RPIs                   */
		uint32_t cmx	: 1;  /* Configure Max XRIs                   */
		uint32_t cerbm	: 1;  /* Configure Enhanced Receive Buf Mgmt  */
		uint32_t cinb   : 1;  /* Enable Interrupt Notification Block  */
		uint32_t chbs   : 1;  /* Cofigure Host Backing store          */
		uint32_t csah   : 1;  /* Configure Synchronous Abort Handling */
		uint32_t ccrp   : 1;  /* Config Command Ring Polling          */
		uint32_t cmv	: 1;  /* Configure Max VPIs                   */
		uint32_t rsvd2  :24;  /* Reserved                             */
#endif
	} sli3Feat;
} lpfc_vpd_t;

struct lpfc_scsi_buf;


/*
 * lpfc stat counters
 */
struct lpfc_stats {
	/* Statistics for ELS commands */
	uint32_t elsLogiCol;
	uint32_t elsRetryExceeded;
	uint32_t elsXmitRetry;
	uint32_t elsDelayRetry;
	uint32_t elsRcvDrop;
	uint32_t elsRcvFrame;
	uint32_t elsRcvRSCN;
	uint32_t elsRcvRNID;
	uint32_t elsRcvFARP;
	uint32_t elsRcvFARPR;
	uint32_t elsRcvFLOGI;
	uint32_t elsRcvPLOGI;
	uint32_t elsRcvADISC;
	uint32_t elsRcvPDISC;
	uint32_t elsRcvFAN;
	uint32_t elsRcvLOGO;
	uint32_t elsRcvPRLO;
	uint32_t elsRcvPRLI;
	uint32_t elsRcvLIRR;
	uint32_t elsRcvRPS;
	uint32_t elsRcvRPL;
	uint32_t elsXmitFLOGI;
	uint32_t elsXmitFDISC;
	uint32_t elsXmitPLOGI;
	uint32_t elsXmitPRLI;
	uint32_t elsXmitADISC;
	uint32_t elsXmitLOGO;
	uint32_t elsXmitSCR;
	uint32_t elsXmitRNID;
	uint32_t elsXmitFARP;
	uint32_t elsXmitFARPR;
	uint32_t elsXmitACC;
	uint32_t elsXmitLSRJT;

	uint32_t frameRcvBcast;
	uint32_t frameRcvMulti;
	uint32_t strayXmitCmpl;
	uint32_t frameXmitDelay;
	uint32_t xriCmdCmpl;
	uint32_t xriStatErr;
	uint32_t LinkUp;
	uint32_t LinkDown;
	uint32_t LinkMultiEvent;
	uint32_t NoRcvBuf;
	uint32_t fcpCmd;
	uint32_t fcpCmpl;
	uint32_t fcpRspErr;
	uint32_t fcpRemoteStop;
	uint32_t fcpPortRjt;
	uint32_t fcpPortBusy;
	uint32_t fcpError;
	uint32_t fcpLocalErr;
};

enum sysfs_mbox_state {
	SMBOX_IDLE,
	SMBOX_WRITING,
	SMBOX_READING
};

struct lpfc_sysfs_mbox {
	enum sysfs_mbox_state state;
	size_t                offset;
	struct lpfcMboxq *    mbox;
};

struct lpfc_hba;


enum discovery_state {
	LPFC_VPORT_UNKNOWN     =  0,    /* vport state is unknown */
	LPFC_VPORT_FAILED      =  1,    /* vport has failed */
	LPFC_LOCAL_CFG_LINK    =  6,    /* local NPORT Id configured */
	LPFC_FLOGI             =  7,    /* FLOGI sent to Fabric */
	LPFC_FDISC             =  8,    /* FDISC sent for vport */
	LPFC_FABRIC_CFG_LINK   =  9,    /* Fabric assigned NPORT Id
				         * configured */
	LPFC_NS_REG            =  10,   /* Register with NameServer */
	LPFC_NS_QRY            =  11,   /* Query NameServer for NPort ID list */
	LPFC_BUILD_DISC_LIST   =  12,   /* Build ADISC and PLOGI lists for
				         * device authentication / discovery */
	LPFC_DISC_AUTH         =  13,   /* Processing ADISC list */
	LPFC_VPORT_READY       =  32,
};

enum hba_state {
	LPFC_LINK_UNKNOWN    =   0,   /* HBA state is unknown */
	LPFC_WARM_START      =   1,   /* HBA state after selective reset */
	LPFC_INIT_START      =   2,   /* Initial state after board reset */
	LPFC_INIT_MBX_CMDS   =   3,   /* Initialize HBA with mbox commands */
	LPFC_LINK_DOWN       =   4,   /* HBA initialized, link is down */
	LPFC_LINK_UP         =   5,   /* Link is up  - issue READ_LA */
	LPFC_CLEAR_LA        =   6,   /* authentication cmplt - issue
				       * CLEAR_LA */
	LPFC_HBA_READY       =  32,
	LPFC_HBA_ERROR       =  -1
};

struct lpfc_vport {
	struct list_head listentry;
	struct lpfc_hba *phba;
	uint8_t port_type;
#define LPFC_PHYSICAL_PORT 1
#define LPFC_NPIV_PORT  2
#define LPFC_FABRIC_PORT 3
	enum discovery_state port_state;

	uint16_t vpi;

	uint32_t fc_flag;	/* FC flags */
/* Several of these flags are HBA centric and should be moved to
 * phba->link_flag (e.g. FC_PTP, FC_PUBLIC_LOOP)
 */
#define FC_PT2PT                0x1	 /* pt2pt with no fabric */
#define FC_PT2PT_PLOGI          0x2	 /* pt2pt initiate PLOGI */
#define FC_DISC_TMO             0x4	 /* Discovery timer running */
#define FC_PUBLIC_LOOP          0x8	 /* Public loop */
#define FC_LBIT                 0x10	 /* LOGIN bit in loopinit set */
#define FC_RSCN_MODE            0x20	 /* RSCN cmd rcv'ed */
#define FC_NLP_MORE             0x40	 /* More node to process in node tbl */
#define FC_OFFLINE_MODE         0x80	 /* Interface is offline for diag */
#define FC_FABRIC               0x100	 /* We are fabric attached */
#define FC_ESTABLISH_LINK       0x200	 /* Reestablish Link */
#define FC_RSCN_DISCOVERY       0x400	 /* Auth all devices after RSCN */
#define FC_SCSI_SCAN_TMO        0x4000	 /* scsi scan timer running */
#define FC_ABORT_DISCOVERY      0x8000	 /* we want to abort discovery */
#define FC_NDISC_ACTIVE         0x10000	 /* NPort discovery active */
#define FC_BYPASSED_MODE        0x20000	 /* NPort is in bypassed mode */
#define FC_RFF_NOT_SUPPORTED    0x40000	 /* RFF_ID was rejected by switch */
#define FC_VPORT_NEEDS_REG_VPI	0x80000  /* Needs to have its vpi registered */
#define FC_RSCN_DEFERRED	0x100000 /* A deferred RSCN being processed */

	struct list_head fc_nodes;

	/* Keep counters for the number of entries in each list. */
	uint16_t fc_plogi_cnt;
	uint16_t fc_adisc_cnt;
	uint16_t fc_reglogin_cnt;
	uint16_t fc_prli_cnt;
	uint16_t fc_unmap_cnt;
	uint16_t fc_map_cnt;
	uint16_t fc_npr_cnt;
	uint16_t fc_unused_cnt;
	struct serv_parm fc_sparam;	/* buffer for our service parameters */

	uint32_t fc_myDID;	/* fibre channel S_ID */
	uint32_t fc_prevDID;	/* previous fibre channel S_ID */

	int32_t stopped;   /* HBA has not been restarted since last ERATT */
	uint8_t fc_linkspeed;	/* Link speed after last READ_LA */

	uint32_t num_disc_nodes;	/*in addition to hba_state */

	uint32_t fc_nlp_cnt;	/* outstanding NODELIST requests */
	uint32_t fc_rscn_id_cnt;	/* count of RSCNs payloads in list */
	struct lpfc_dmabuf *fc_rscn_id_list[FC_MAX_HOLD_RSCN];