skgepnmi.c

linux-2.6.15.6

 *	SkGePnmiPreSetVar, or SkGePnmiSetVar.
 *
 * Returns:
 *	SK_PNMI_ERR_XXX. For details have a look at the description of the
 *	calling functions.
 *	SK_PNMI_ERR_UNKNOWN_NET  The requested NetIndex doesn't exist
 */
PNMI_STATIC int PnmiVar(
SK_AC *pAC,		/* Pointer to adapter context */
SK_IOC IoC,		/* IO context handle */
int Action,		/* GET/PRESET/SET action */
SK_U32 Id,		/* Object ID that is to be processed */
char *pBuf,		/* Buffer used for the management data transfer */
unsigned int *pLen,	/* Total length of pBuf management data  */
SK_U32 Instance,	/* Instance (1..n) that is to be set or -1 */
SK_U32 NetIndex)	/* NetIndex (0..n), in single net mode always zero */
{
	unsigned int	TableIndex;
	int		Ret;


	if ((TableIndex = LookupId(Id)) == (unsigned int)(-1)) {

		*pLen = 0;
		return (SK_PNMI_ERR_UNKNOWN_OID);
	}
	
    /* Check NetIndex */
	if (NetIndex >= pAC->Rlmt.NumNets) {
		return (SK_PNMI_ERR_UNKNOWN_NET);
	}

	SK_PNMI_CHECKFLAGS("PnmiVar: On call");

	Ret = IdTable[TableIndex].Func(pAC, IoC, Action, Id, pBuf, pLen,
		Instance, TableIndex, NetIndex);

	SK_PNMI_CHECKFLAGS("PnmiVar: On return");

	return (Ret);
}

/*****************************************************************************
 *
 * PnmiStruct - Presets and Sets data in structure SK_PNMI_STRUCT_DATA
 *
 * Description:
 *	The return value of the function will also be stored in
 *	SK_PNMI_STRUCT_DATA if the passed buffer has the minimum size of
 *	SK_PNMI_MIN_STRUCT_SIZE. The sub-function runs through the IdTable,
 *	checks which OIDs are able to set, and calls the handler function of
 *	the OID to perform the set. The return value of the function will
 *	also be stored in SK_PNMI_STRUCT_DATA if the passed buffer has the
 *	minimum size of SK_PNMI_MIN_STRUCT_SIZE. The function is called
 *	by SkGePnmiPreSetStruct and SkGePnmiSetStruct.
 *
 * Returns:
 *	SK_PNMI_ERR_XXX. The codes are described in the calling functions.
 *	SK_PNMI_ERR_UNKNOWN_NET  The requested NetIndex doesn't exist
 */
PNMI_STATIC int PnmiStruct(
SK_AC *pAC,		/* Pointer to adapter context */
SK_IOC IoC,		/* IO context handle */
int  Action,	/* PRESET/SET action to be performed */
char *pBuf,		/* Buffer used for the management data transfer */
unsigned int *pLen,	/* Length of pBuf management data buffer */
SK_U32 NetIndex)	/* NetIndex (0..n), in single net mode always zero */
{
	int		Ret;
	unsigned int	TableIndex;
	unsigned int	DstOffset;
	unsigned int	Len;
	unsigned int	InstanceNo;
	unsigned int	InstanceCnt;
	SK_U32		Instance;
	SK_U32		Id;


	/* Check if the passed buffer has the right size */
	if (*pLen < SK_PNMI_STRUCT_SIZE) {

		/* Check if we can return the error within the buffer */
		if (*pLen >= SK_PNMI_MIN_STRUCT_SIZE) {

			SK_PNMI_SET_STAT(pBuf, SK_PNMI_ERR_TOO_SHORT,
				(SK_U32)(-1));
		}

		*pLen = SK_PNMI_STRUCT_SIZE;
		return (SK_PNMI_ERR_TOO_SHORT);
	}
	
    /* Check NetIndex */
	if (NetIndex >= pAC->Rlmt.NumNets) {
		return (SK_PNMI_ERR_UNKNOWN_NET);
	}
	
	SK_PNMI_CHECKFLAGS("PnmiStruct: On call");

	/*
	 * Update the values of RLMT and SIRQ and increment semaphores to
	 * indicate that an update was already done.
	 */
	if ((Ret = RlmtUpdate(pAC, IoC, NetIndex)) != SK_PNMI_ERR_OK) {

		SK_PNMI_SET_STAT(pBuf, Ret, (SK_U32)(-1));
		*pLen = SK_PNMI_MIN_STRUCT_SIZE;
		return (Ret);
	}

	if ((Ret = SirqUpdate(pAC, IoC)) != SK_PNMI_ERR_OK) {

		SK_PNMI_SET_STAT(pBuf, Ret, (SK_U32)(-1));
		*pLen = SK_PNMI_MIN_STRUCT_SIZE;
		return (Ret);
	}

	pAC->Pnmi.RlmtUpdatedFlag ++;
	pAC->Pnmi.SirqUpdatedFlag ++;

	/* Preset/Set values */
	for (TableIndex = 0; TableIndex < ID_TABLE_SIZE; TableIndex ++) {

		if ((IdTable[TableIndex].Access != SK_PNMI_RW) &&
			(IdTable[TableIndex].Access != SK_PNMI_WO)) {

			continue;
		}

		InstanceNo = IdTable[TableIndex].InstanceNo;
		Id = IdTable[TableIndex].Id;

		for (InstanceCnt = 1; InstanceCnt <= InstanceNo;
			InstanceCnt ++) {

			DstOffset = IdTable[TableIndex].Offset +
				(InstanceCnt - 1) *
				IdTable[TableIndex].StructSize;

			/*
			 * Because VPD multiple instance variables are
			 * not setable we do not need to evaluate VPD
			 * instances. Have a look to VPD instance
			 * calculation in SkPnmiGetStruct().
			 */
			Instance = (SK_U32)InstanceCnt;

			/*
			 * Evaluate needed buffer length
			 */
			Len = 0;
			Ret = IdTable[TableIndex].Func(pAC, IoC,
				SK_PNMI_GET, IdTable[TableIndex].Id,
				NULL, &Len, Instance, TableIndex, NetIndex);

			if (Ret == SK_PNMI_ERR_UNKNOWN_INST) {

				break;
			}
			if (Ret != SK_PNMI_ERR_TOO_SHORT) {

				pAC->Pnmi.RlmtUpdatedFlag --;
				pAC->Pnmi.SirqUpdatedFlag --;

				SK_PNMI_CHECKFLAGS("PnmiStruct: On return");
				SK_PNMI_SET_STAT(pBuf,
					SK_PNMI_ERR_GENERAL, DstOffset);
				*pLen = SK_PNMI_MIN_STRUCT_SIZE;
				return (SK_PNMI_ERR_GENERAL);
			}
			if (Id == OID_SKGE_VPD_ACTION) {

				switch (*(pBuf + DstOffset)) {

				case SK_PNMI_VPD_CREATE:
					Len = 3 + *(pBuf + DstOffset + 3);
					break;

				case SK_PNMI_VPD_DELETE:
					Len = 3;
					break;

				default:
					Len = 1;
					break;
				}
			}

			/* Call the OID handler function */
			Ret = IdTable[TableIndex].Func(pAC, IoC, Action,
				IdTable[TableIndex].Id, pBuf + DstOffset,
				&Len, Instance, TableIndex, NetIndex);

			if (Ret != SK_PNMI_ERR_OK) {

				pAC->Pnmi.RlmtUpdatedFlag --;
				pAC->Pnmi.SirqUpdatedFlag --;

				SK_PNMI_CHECKFLAGS("PnmiStruct: On return");
				SK_PNMI_SET_STAT(pBuf, SK_PNMI_ERR_BAD_VALUE,
					DstOffset);
				*pLen = SK_PNMI_MIN_STRUCT_SIZE;
				return (SK_PNMI_ERR_BAD_VALUE);
			}
		}
	}

	pAC->Pnmi.RlmtUpdatedFlag --;
	pAC->Pnmi.SirqUpdatedFlag --;

	SK_PNMI_CHECKFLAGS("PnmiStruct: On return");
	SK_PNMI_SET_STAT(pBuf, SK_PNMI_ERR_OK, (SK_U32)(-1));
	return (SK_PNMI_ERR_OK);
}

/*****************************************************************************
 *
 * LookupId - Lookup an OID in the IdTable
 *
 * Description:
 *	Scans the IdTable to find the table entry of an OID.
 *
 * Returns:
 *	The table index or -1 if not found.
 */
PNMI_STATIC int LookupId(
SK_U32 Id)		/* Object identifier to be searched */
{
	int i;

	for (i = 0; i < ID_TABLE_SIZE; i++) {

		if (IdTable[i].Id == Id) {

			return i;
		}
	}

	return (-1);
}

/*****************************************************************************
 *
 * OidStruct - Handler of OID_SKGE_ALL_DATA
 *
 * Description:
 *	This OID performs a Get/Preset/SetStruct call and returns all data
 *	in a SK_PNMI_STRUCT_DATA structure.
 *
 * Returns:
 *	SK_PNMI_ERR_OK           The request was successfully performed.
 *	SK_PNMI_ERR_GENERAL      A general severe internal error occured.
 *	SK_PNMI_ERR_TOO_SHORT    The passed buffer is too short to contain
 *	                         the correct data (e.g. a 32bit value is
 *	                         needed, but a 16 bit value was passed).
 *	SK_PNMI_ERR_BAD_VALUE    The passed value is not in the valid
 *	                         value range.
 *	SK_PNMI_ERR_READ_ONLY    The OID is read-only and cannot be set.
 *	SK_PNMI_ERR_UNKNOWN_INST The requested instance of the OID doesn't
 *                           exist (e.g. port instance 3 on a two port
 *	                         adapter.
 */
PNMI_STATIC int OidStruct(
SK_AC *pAC,		/* Pointer to adapter context */
SK_IOC IoC,		/* IO context handle */
int Action,		/* GET/PRESET/SET action */
SK_U32 Id,		/* Object ID that is to be processed */
char *pBuf,		/* Buffer used for the management data transfer */
unsigned int *pLen,	/* On call: pBuf buffer length. On return: used buffer */
SK_U32 Instance,	/* Instance (1..n) that is to be queried or -1 */
unsigned int TableIndex, /* Index to the Id table */
SK_U32 NetIndex)	/* NetIndex (0..n), in single net mode always zero */
{
	if (Id != OID_SKGE_ALL_DATA) {

		SK_ERR_LOG(pAC, SK_ERRCL_SW, SK_PNMI_ERR003,
			SK_PNMI_ERR003MSG);

		*pLen = 0;
		return (SK_PNMI_ERR_GENERAL);
	}

	/*
	 * Check instance. We only handle single instance variables
	 */
	if (Instance != (SK_U32)(-1) && Instance != 1) {

		*pLen = 0;
		return (SK_PNMI_ERR_UNKNOWN_INST);
	}

	switch (Action) {

	case SK_PNMI_GET:
		return (SkPnmiGetStruct(pAC, IoC, pBuf, pLen, NetIndex));

	case SK_PNMI_PRESET:
		return (SkPnmiPreSetStruct(pAC, IoC, pBuf, pLen, NetIndex));

	case SK_PNMI_SET:
		return (SkPnmiSetStruct(pAC, IoC, pBuf, pLen, NetIndex));
	}

	SK_ERR_LOG(pAC, SK_ERRCL_SW, SK_PNMI_ERR004, SK_PNMI_ERR004MSG);

	*pLen = 0;
	return (SK_PNMI_ERR_GENERAL);
}

/*****************************************************************************
 *
 * Perform - OID handler of OID_SKGE_ACTION
 *
 * Description:
 *	None.
 *
 * Returns:
 *	SK_PNMI_ERR_OK           The request was successfully performed.
 *	SK_PNMI_ERR_GENERAL      A general severe internal error occured.
 *	SK_PNMI_ERR_TOO_SHORT    The passed buffer is too short to contain
 *	                         the correct data (e.g. a 32bit value is
 *	                         needed, but a 16 bit value was passed).
 *	SK_PNMI_ERR_BAD_VALUE    The passed value is not in the valid
 *	                         value range.
 *	SK_PNMI_ERR_READ_ONLY    The OID is read-only and cannot be set.
 *	SK_PNMI_ERR_UNKNOWN_INST The requested instance of the OID doesn't
 *                           exist (e.g. port instance 3 on a two port
 *	                         adapter.
 */
PNMI_STATIC int Perform(
SK_AC *pAC,		/* Pointer to adapter context */
SK_IOC IoC,		/* IO context handle */
int Action,		/* GET/PRESET/SET action */
SK_U32 Id,		/* Object ID that is to be processed */
char *pBuf,		/* Buffer used for the management data transfer */
unsigned int *pLen,	/* On call: pBuf buffer length. On return: used buffer */
SK_U32 Instance,	/* Instance (1..n) that is to be queried or -1 */
unsigned int TableIndex, /* Index to the Id table */
SK_U32 NetIndex)	/* NetIndex (0..n), in single net mode always zero */
{
	int	Ret;
	SK_U32	ActionOp;


	/*
	 * Check instance. We only handle single instance variables
	 */
	if (Instance != (SK_U32)(-1) && Instance != 1) {

		*pLen = 0;
		return (SK_PNMI_ERR_UNKNOWN_INST);
	}

	if (*pLen < sizeof(SK_U32)) {

		*pLen = sizeof(SK_U32);
		return (SK_PNMI_ERR_TOO_SHORT);
	}

	/* Check if a get should be performed */
	if (Action == SK_PNMI_GET) {

		/* A get is easy. We always return the same value */
		ActionOp = (SK_U32)SK_PNMI_ACT_IDLE;
		SK_PNMI_STORE_U32(pBuf, ActionOp);
		*pLen = sizeof(SK_U32);

		return (SK_PNMI_ERR_OK);
	}

	/* Continue with PRESET/SET action */
	if (*pLen > sizeof(SK_U32)) {

		return (SK_PNMI_ERR_BAD_VALUE);
	}

	/* Check if the command is a known one */
	SK_PNMI_READ_U32(pBuf, ActionOp);
	if (*pLen > sizeof(SK_U32) ||
		(ActionOp != SK_PNMI_ACT_IDLE &&
		ActionOp != SK_PNMI_ACT_RESET &&
		ActionOp != SK_PNMI_ACT_SELFTEST &&
		ActionOp != SK_PNMI_ACT_RESETCNT)) {

		*pLen = 0;
		return (SK_PNMI_ERR_BAD_VALUE);
	}

	/* A preset ends here */
	if (Action == SK_PNMI_PRESET) {

		return (SK_PNMI_ERR_OK);
	}

	switch (ActionOp) {

	case SK_PNMI_ACT_IDLE:
		/* Nothing to do */
		break;

	case SK_PNMI_ACT_RESET:
		/*
		 * Perform a driver reset or something that comes near
		 * to this.
		 */
		Ret = SK_DRIVER_RESET(pAC, IoC);
		if (Ret != 0) {

			SK_ERR_LOG(pAC, SK_ERRCL_SW, SK_PNMI_ERR005,
				SK_PNMI_ERR005MSG);

			return (SK_PNMI_ERR_GENERAL);
		}
		break;

	case SK_PNMI_ACT_SELFTEST:
		/*
		 * Perform a driver selftest or something similar to this.
		 * Currently this feature is not used and will probably
		 * implemented in