cpqfctsstructs.h

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// because of kernel memory allocation constraints!)

typedef struct // we will allocate this dynamically
{
  FC_EXCHANGE fcExchange[ TACH_MAX_XID ];
} FC_EXCHANGES;











typedef struct
{
  char Name[64]; // name of controller ("HP Tachlite TL Rev2.0, 33MHz, 64bit bus")
  //PVOID  pAdapterDevExt; // back pointer to device object/extension
  ULONG ChipType;        // local numeric key for Tachyon Type / Rev.
  ULONG status;              // our Driver - logical status
  
  TL_REGISTERS Registers;    // reg addresses & host memory copies
                             // FC-4 mapping of 'transaction' to X_IDs
  UCHAR LILPmap[32*4];       // Loop Position Map of ALPAs (late FC-AL only)
  FC_OPTIONS Options;        // e.g. Target, Initiator, loopback...
  UCHAR highest_FCPH_ver;    // FC-PH version limits
  UCHAR lowest_FCPH_ver;     // FC-PH version limits

  FC_EXCHANGES *Exchanges;  
  ULONG fcLsExchangeLRU;       // Least Recently Used counter (Link Service)
  ULONG fcSestExchangeLRU;       // Least Recently Used counter (FCP-SCSI)
  FC_LOGGEDIN_PORT fcPorts;  // linked list of every FC port ever seen
  FCSTATS fcStats;           // FC comm err counters

                             // Host memory QUEUE pointers
  TachLiteERQ *ERQ;          // Exchange Request Que 
  TachyonIMQ *IMQ;           // Inbound Message Que 
  TachLiteSFQ *SFQ;          // Single Frame Queue
  TachSEST *SEST;            // SCSI Exchange State Table

  dma_addr_t exch_dma_handle;

  // these function pointers are for "generic" functions, which are
  // replaced with Host Bus Adapter types at
  // runtime.
  int (*CreateTachyonQues)( void* , int);
  int (*DestroyTachyonQues)( void* , int);
  int (*LaserControl)(void*, int );   // e.g. On/Off
  int (*ResetTachyon)(void*, int );
  void (*FreezeTachyon)(void*, int );
  void (*UnFreezeTachyon)(void*, int );
  int (*InitializeTachyon)(void*, int, int );
  int (*InitializeFrameManager)(void*, int );
  int (*ProcessIMQEntry)(void*);
  int (*ReadWriteWWN)(void*, int ReadWrite);
  int (*ReadWriteNVRAM)(void*, void*, int ReadWrite);

} TACHYON, *PTACHYON;


void cpqfcTSClearLinkStatusCounters(TACHYON * fcChip);

int CpqTsCreateTachLiteQues( void* pHBA, int opcode);
int CpqTsDestroyTachLiteQues( void* , int);
int CpqTsInitializeTachLite( void *pHBA, int opcode1, int opcode2);

int CpqTsProcessIMQEntry(void* pHBA);
int CpqTsResetTachLite(void *pHBA, int type);
void CpqTsFreezeTachlite(void *pHBA, int type);
void CpqTsUnFreezeTachlite(void *pHBA, int type);
int CpqTsInitializeFrameManager(void *pHBA, int);
int CpqTsLaserControl( void* addrBase, int opcode );
int CpqTsReadWriteWWN(void*, int ReadWrite);
int CpqTsReadWriteNVRAM(void*, void* data, int ReadWrite);

void cpqfcTS_WorkTask( struct Scsi_Host *HostAdapter);
void cpqfcTSWorkerThread( void *host);

int cpqfcTS_GetNVRAM_data( UCHAR *wwnbuf, UCHAR *buf );
ULONG cpqfcTS_ReadNVRAM( void* GPIOin, void* GPIOout , USHORT count,
	UCHAR *buf );

BOOLEAN tl_write_i2c_nvram( void* GPIOin, void* GPIOout,
  USHORT startOffset,  // e.g. 0x2f for WWN start
  USHORT count,
  UCHAR *buf );


// define misc functions 
int cpqfcTSGetLPSM( PTACHYON fcChip, char cErrorString[]);
int cpqfcTSDecodeGBICtype( PTACHYON fcChip, char cErrorString[]);
void* fcMemManager( struct pci_dev *pdev,
		ALIGNED_MEM *dyn_mem_pair, ULONG n_alloc, ULONG ab,
                   ULONG ulAlignedAddress, dma_addr_t *dma_handle);

void BigEndianSwap(  UCHAR *source, UCHAR *dest,  USHORT cnt);

//ULONG virt_to_phys( PVOID virtaddr );
                  

// Linux interrupt handler
void cpqfcTS_intr_handler( int irq,void *dev_id,struct pt_regs *regs);
void cpqfcTSheartbeat( unsigned long ptr );



// The biggest Q element we deal with is Aborts - we
// need 4 bytes for x_ID, and a Scsi_Cmnd (~284 bytes)
//#define LINKQ_ITEM_SIZE ((4+sizeof(Scsi_Cmnd)+3)/4)
#define LINKQ_ITEM_SIZE (3*16)
typedef struct
{
  ULONG Type;              // e.g. LINKUP, SFQENTRY, PDISC, BLS_ABTS, ...
  ULONG ulBuff[ LINKQ_ITEM_SIZE ];
} LINKQ_ITEM;

#define FC_LINKQ_DEPTH TACH_MAX_XID
typedef struct
{
  ULONG producer;
  ULONG consumer;  // when producer equals consumer, Q empty

  LINKQ_ITEM Qitem[ FC_LINKQ_DEPTH ];

} FC_LINK_QUE, *PFC_LINK_QUE;


     // DPC routines post to here on Inbound SCSI frames
     // User thread processes
#define FC_SCSIQ_DEPTH 32

typedef struct
{
  int Type;              // e.g. SCSI
  ULONG ulBuff[ 3*16 ];
} SCSIQ_ITEM;

typedef struct
{
  ULONG producer;
  ULONG consumer;  // when producer equals consumer, Q empty

  SCSIQ_ITEM Qitem[ FC_SCSIQ_DEPTH ];

} FC_SCSI_QUE, *PFC_SCSI_QUE;





#define DYNAMIC_ALLOCATIONS 4  // Tachyon aligned allocations: ERQ,IMQ,SFQ,SEST

// Linux space allocated per HBA (chip state, etc.)
typedef struct 
{
  struct Scsi_Host *HostAdapter; // back pointer to Linux Scsi struct

  TACHYON fcChip;    // All Tachyon registers, Queues, functions
  ALIGNED_MEM dynamic_mem[DYNAMIC_ALLOCATIONS];

  struct pci_dev *PciDev;
  dma_addr_t fcLQ_dma_handle;

  Scsi_Cmnd *LinkDnCmnd[CPQFCTS_REQ_QUEUE_LEN]; // collects Cmnds during LDn
                                                // (for Acceptable targets)
  Scsi_Cmnd *BoardLockCmnd[CPQFCTS_REQ_QUEUE_LEN]; // SEST was full
  
  Scsi_Cmnd *BadTargetCmnd[CPQFCTS_MAX_TARGET_ID]; // missing targets

  u_char HBAnum;     // 0-based host number


  struct timer_list cpqfcTStimer; // FC utility timer for implicit
                                  // logouts, FC protocol timeouts, etc.
  int fcStatsTime;  // Statistics delta reporting time

  struct task_struct *worker_thread; // our kernel thread
  int PortDiscDone;    // set by SendLogins(), cleared by LDn
  
  struct semaphore *TachFrozen;
  struct semaphore *TYOBcomplete;    // handshake for Tach outbound frames
  struct semaphore *fcQueReady;      // FibreChannel work for our kernel thread
  struct semaphore *notify_wt;       // synchronizes kernel thread kill
  struct semaphore *BoardLock;
  
  PFC_LINK_QUE fcLQ;             // the WorkerThread operates on this

  spinlock_t hba_spinlock;           // held/released by WorkerThread

} CPQFCHBA;

#define	CPQ_SPINLOCK_HBA( x )   spin_lock(&x->hba_spinlock);
#define CPQ_SPINUNLOCK_HBA(x)   spin_unlock(&x->hba_spinlock);



void cpqfcTSImplicitLogout( CPQFCHBA* cpqfcHBAdata,
		PFC_LOGGEDIN_PORT pFcPort);


void cpqfcTSTerminateExchange( CPQFCHBA*, SCSI_NEXUS *target, int );

PFC_LOGGEDIN_PORT fcPortLoggedIn( 
   CPQFCHBA *cpqfcHBAdata, 
   TachFCHDR_GCMND* fchs, 
   BOOLEAN, 
   BOOLEAN);
void fcProcessLoggedIn( 
   CPQFCHBA *cpqfcHBAdata, TachFCHDR_GCMND* fchs);


ULONG cpqfcTSBuildExchange( 
  CPQFCHBA *cpqfcHBAdata,
  ULONG type, // e.g. PLOGI
  TachFCHDR_GCMND* InFCHS,  // incoming FCHS
  void *Data,               // the CDB, scatter/gather, etc.  
  LONG *ExchangeID );       // allocated exchange ID

ULONG cpqfcTSStartExchange( 
  CPQFCHBA *cpqfcHBAdata,
  LONG ExchangeID );

void cpqfcTSCompleteExchange( 
       struct pci_dev *pcidev,
       PTACHYON fcChip, 
       ULONG exchange_ID);


PFC_LOGGEDIN_PORT  fcFindLoggedInPort( 
  PTACHYON fcChip, 
  Scsi_Cmnd *Cmnd,  // (We want the channel/target/lun Nexus from Cmnd)
  ULONG port_id,  // search linked list for al_pa, or
  UCHAR wwn[8],    // search linked list for WWN, or...
  PFC_LOGGEDIN_PORT *pLastLoggedInPort
);

void cpqfcTSPutLinkQue( 
  CPQFCHBA *cpqfcHBAdata, 
  int Type, 
  void *QueContent);

void fcPutScsiQue( 
  CPQFCHBA *cpqfcHBAdata, 
  int Type, 
  void *QueContent);

void fcLinkQReset(
   CPQFCHBA *);
void fcScsiQReset(
   CPQFCHBA *);
void fcSestReset(
   CPQFCHBA *);

void cpqfc_pci_unmap(struct pci_dev *pcidev, 
	Scsi_Cmnd *cmd, 
	PTACHYON fcChip, 
	ULONG x_ID);

extern const UCHAR valid_al_pa[];
extern const int number_of_al_pa;

#define FCP_RESID_UNDER   0x80000
#define FCP_RESID_OVER    0x40000
#define FCP_SNS_LEN_VALID 0x20000
#define FCP_RSP_LEN_VALID 0x10000

// RSP_CODE definitions (dpANS Fibre Channel Protocol for SCSI, pg 34)
#define FCP_DATA_LEN_NOT_BURST_LEN 0x1000000
#define FCP_CMND_FIELD_INVALID     0x2000000
#define FCP_DATA_RO_NOT_XRDY_RO    0x3000000
#define FCP_TASKFUNCTION_NS        0x4000000
#define FCP_TASKFUNCTION_FAIL      0x5000000

// FCP-SCSI response status struct
typedef struct  // see "TachFCHDR_RSP" definition - 64 bytes
{
  __u32 reserved;
  __u32 reserved1;
  __u32 fcp_status;    // field validity and SCSI status
  __u32 fcp_resid;
  __u32 fcp_sns_len;   // length of FCP_SNS_INFO field
  __u32 fcp_rsp_len;   // length of FCP_RSP_INFO field (expect 8)
  __u32 fcp_rsp_info;  // 4 bytes of FCP protocol response information
  __u32 fcp_rsp_info2; // (4 more bytes, since most implementations use 8)
  __u8  fcp_sns_info[36]; // bytes for SCSI sense (ASC, ASCQ)

} FCP_STATUS_RESPONSE, *PFCP_STATUS_RESPONSE;


// Fabric State Change Registration
typedef struct scrpl
{
  __u32 command;
  __u32 function;
} SCR_PL;

// Fabric Name Service Request
typedef struct nsrpl
{
  __u32 CT_Rev;  // (& IN_ID)   WORD 0
  __u32 FCS_Type;            // WORD 1
  __u32 Command_code;        // WORD 2
  __u32 reason_code;         // WORD 3
  __u32 FCP;                 // WORD 4 (lower byte)
  
} NSR_PL;



// "FC.H"
#define MAX_RX_SIZE		0x800	// Max Receive Buffer Size is 2048
#define MIN_RX_SIZE		0x100	// Min Size is 256, per FC-PLDA Spec
#define	MAX_TARGET_RXIDS	SEST_DEPTH
#define TARGET_RX_SIZE		SEST_BUFFER_LENGTH

#define CLASS_1			0x01
#define CLASS_2			0x02
#define CLASS_3			0x03

#define FC_PH42			0x08
#define FC_PH43			0x09
#define FC_PH3			0x20

#define RR_TOV			2	// Minimum Time for target to wait for
					// PDISC after a LIP.
#define E_D_TOV			2	// Minimum Time to wait for Sequence
					// Completion.
#define R_A_TOV			0	// Minimum Time for Target to wait 
					// before reclaiming resources.
//
//	R_CTL Field
//
//	Routing Bits (31-28)
//
#define FC4_DEVICE_DATA		0x00000000
#define EXT_LINK_DATA		0x20000000
#define FC4_LINK_DATA		0x30000000
#define VIDEO_DATA		0x40000000
#define BASIC_LINK_DATA		0x80000000
#define LINK_CONTROL		0xC0000000
#define ROUTING_MASK		0xF0000000

//
//	Information Bits (27-24)
//
#define UNCAT_INFORMATION	0x00000000
#define SOLICITED_DATA		0x01000000
#define UNSOLICITED_CONTROL	0x02000000
#define SOLICITED_CONTROL	0x03000000
#define UNSOLICITED_DATA	0x04000000
#define DATA_DESCRIPTOR		0x05000000
#define UNSOLICITED_COMMAND	0x06000000
#define COMMAND_STATUS		0x07000000
#define INFO_MASK		0x0F000000
//
//	(Link Control Codes)
//
#define ACK_1			0x00000000
#define ACK_0_OR_N		0x01000000
#define P_RJT			0x02000000 
#define F_RJT			0x03000000 
#define P_BSY			0x04000000
#define FABRIC_BUSY_TO_DF	0x05000000	// Fabric Busy to Data Frame
#define FABRIC_BUSY_TO_LC	0x06000000	// Fabric Busy to Link Ctl Frame
#define LINK_CREDIT_RESET	0x07000000
//
//	(Link Service Command Codes)
//
//#define LS_RJT			0x01000000	// LS Reject

#define LS_ACC			0x02000000	// LS Accept
#define LS_PLOGI		0x03000000	// N_PORT Login
#define LS_FLOGI		0x04000000	// F_PORT Login
#define LS_LOGO			0x05000000	// Logout
#define LS_ABTX			0x06000000	// Abort Exchange
#define LS_RCS			0x07000000	// Read Connection Status
#define LS_RES			0x08000000	// Read Exchange Status
#define LS_RSS			0x09000000	// Read Sequence Status
#define LS_RSI			0x0A000000	// Request Seq Initiative