/*
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    (C) Copyright 1999
        All rights reserved.

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  Portions of this software are:

    (C) Copyright 1995 TriplePoint, Inc. -- http://www.TriplePoint.com
        License to use this software is granted under the same terms
        outlined in the Microsoft Windows Device Driver Development Kit.

    (C) Copyright 1992 Microsoft Corp. -- http://www.Microsoft.com
        License to use this software is granted under the terms outlined in
        the Microsoft Windows Device Driver Development Kit.

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@doc INTERNAL Adapter Adapter_c

@module Adapter.c |

    This module implements the interface to the <t MINIPORT_ADAPTER_OBJECT>.
    Supports the high-level adapter control functions used by the NDIS WAN
    Minport driver.

@comm

    This module isolates most the NDIS specific, logical adapter interfaces.
    It should require very little change if you follow this same overall
    architecture.  You should try to isolate your changes to the <t CARD_OBJECT>
    that is contained within the logical adapter <t MINIPORT_ADAPTER_OBJECT>.

@head3 Contents |
@index class,mfunc,func,msg,mdata,struct,enum | Adapter_c

@end
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*/

#define  __FILEID__             MINIPORT_ADAPTER_OBJECT_TYPE
// Unique file ID for error logging

#include "Miniport.h"                   // Defines all the miniport objects

#if defined(NDIS_LCODE)
#   pragma NDIS_LCODE   // Windows 9x wants this code locked down!
#   pragma NDIS_LDATA
#endif


PMINIPORT_ADAPTER_OBJECT        g_Adapters[MAX_ADAPTERS]    // @globalv
// Keeps track of all the <t MINIPORT_ADAPTER_OBJECT>s created by the driver.
                                = { 0 };

DBG_STATIC ULONG                g_AdapterInstanceCounter    // @globalv
// Keeps track of how many <t MINIPORT_ADAPTER_OBJECT>s are created and
// stored in the <p g_Adapters> array.
                                = 0;

DBG_STATIC UCHAR                g_AnsiDriverName[]          // @globalv
// ANSI string used to identify the driver to the system; usually defined
// as VER_PRODUCT_STR.
                                = VER_PRODUCT_STR;

DBG_STATIC UCHAR                g_AnsiVendorDescription[]   // @globalv
// ANSI string used to identify the vendor's device to the system; usually
// defined as VER_DEVICE_STR " Adapter".
                                = VER_DEVICE_STR " Adapter";


/* @doc INTERNAL EXTERNAL Adapter Adapter_c g_AdapterParameters
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@topic 5.1 Adapter Parameters |

    This section describes the registry parameters read into the
    <t MINIPORT_ADAPTER_OBJECT>.

@globalv DBG_STATIC <t PARAM_TABLE> | g_AdapterParameters |

    This table defines the registry based parameters to be assigned to data
    members of the <t MINIPORT_ADAPTER_OBJECT>.

    <f Note>:
    If you add any registry based data members to <t MINIPORT_ADAPTER_OBJECT>
    you will need to modify <f AdapterReadParameters> and add the parameter
    definitions to the <f g_AdapterParameters> table.

@flag <f DebugFlags> (OPTIONAL) (DEBUG VERSION ONLY) |

    This DWORD parameter allows you to control how much debug information is
    displayed to the debug monitor.  This is a bit OR'd flag using the values
    defined in <t DBG_FLAGS>.  This value is not used by the released version
    of the driver.<nl>

*/

DBG_STATIC PARAM_TABLE  g_AdapterParameters[] =
{
#if DBG
    PARAM_ENTRY(MINIPORT_ADAPTER_OBJECT,
                DbgFlags, PARAM_DebugFlags,
                FALSE, NdisParameterHexInteger, 0,
                DBG_DEFAULTS | DBG_TAPICALL_ON, 0, 0xffffffff),
                // TODO: Change the debug flags to meet your needs.
#endif
    /* The last entry must be an empty string! */
    { { 0 } }
};


/* @doc INTERNAL Adapter Adapter_c AdapterReadParameters
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@func

    <f AdapterReadParameters> reads the adapter parameters from the registry
    and initializes the associated data members.  This should only be called
    by <f AdapterCreate>.

    <f Note>:
    If you add any registry based data members to <t MINIPORT_ADAPTER_OBJECT>
    you will need to modify <f AdapterReadParameters> and add the parameter
    definitions to the <f g_AdapterParameters> table.

@rdesc

    <f AdapterReadParameters> returns zero if it is successful.<nl>
    Otherwise, a non-zero return value indicates an error condition.

*/

DBG_STATIC NDIS_STATUS AdapterReadParameters(
    IN PMINIPORT_ADAPTER_OBJECT pAdapter                    // @parm
    // A pointer to the <t MINIPORT_ADAPTER_OBJECT> instance return by
    // <f AdapterCreate>.
    )
{
    DBG_FUNC("AdapterReadParameters")

    NDIS_STATUS                 Result;
    // Holds the result code returned by this function.

    ASSERT(pAdapter && pAdapter->ObjectType == MINIPORT_ADAPTER_OBJECT_TYPE);
    DBG_ENTER(DbgInfo);

    /*
    // Parse the registry parameters.
    */
    Result = ParamParseRegistry(
                    pAdapter->MiniportAdapterHandle,
                    pAdapter->WrapperConfigurationContext,
                    (PUCHAR)pAdapter,
                    g_AdapterParameters
                    );

    if (Result == NDIS_STATUS_SUCCESS)
    {
        /*
        // Make sure the parameters are valid.
        */
        if (pAdapter->TODO)
        {
            DBG_ERROR(DbgInfo,("Invalid value 'TODO'\n",
                        pAdapter->TODO));
            NdisWriteErrorLogEntry(
                    pAdapter->MiniportAdapterHandle,
                    NDIS_ERROR_CODE_UNSUPPORTED_CONFIGURATION,
                    3,
                    pAdapter->TODO,
                    __FILEID__,
                    __LINE__
                    );
            Result = NDIS_STATUS_FAILURE;
        }
    }

    DBG_RETURN(DbgInfo, Result);
    return (Result);
}


/* @doc INTERNAL Adapter Adapter_c AdapterCreateObjects
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@func

    <f AdapterCreateObjects> calls the create routines for all the objects
    contained in <t MINIPORT_ADAPTER_OBJECT>.  This should only be called
    by <f AdapterCreate>.

    <f Note>:
    If you add any new objects to <t MINIPORT_ADAPTER_OBJECT> you will need
    to modify <f AdapterCreateObjects> and <f AdapterDestroyObjects> so they
    will get created and destroyed properly.

@rdesc

    <f AdapterCreateObjects> returns zero if it is successful.<nl>
    Otherwise, a non-zero return value indicates an error condition.

*/

DBG_STATIC NDIS_STATUS AdapterCreateObjects(
    IN PMINIPORT_ADAPTER_OBJECT pAdapter                    // @parm
    // A pointer to the <t MINIPORT_ADAPTER_OBJECT> instance return by
    // <f AdapterCreate>.
    )
{
    DBG_FUNC("AdapterCreateObjects")

    NDIS_STATUS                 Result;
    // Holds the result code returned by this function.

    ULONG                       Index;
    // Loop counter.

    ULONG                       NumBChannels;
    // The number of BChannels supported by the NIC.

    ASSERT(pAdapter && pAdapter->ObjectType == MINIPORT_ADAPTER_OBJECT_TYPE);
    DBG_ENTER(DbgInfo);

    /*
    // Create the Card object.
    */
    Result = CardCreate(&pAdapter->pCard, pAdapter);

    /*
    // Create the DChannel object.
    */
    if (Result == NDIS_STATUS_SUCCESS)
    {
        Result = DChannelCreate(&pAdapter->pDChannel, pAdapter);
    }

    /*
    // Allocate space for the BChannels.
    */
    if (Result == NDIS_STATUS_SUCCESS)
    {
        NumBChannels = CardNumChannels(pAdapter->pCard);

        Result = ALLOCATE_MEMORY(pAdapter->pBChannelArray,
                                 sizeof(PVOID) * NumBChannels,
                                 pAdapter->MiniportAdapterHandle);
    }

    /*
    // Create the BChannel objects.
    */
    InitializeListHead(&pAdapter->BChannelAvailableList);
    for (Index = 0; Result == NDIS_STATUS_SUCCESS &&
         Index < NumBChannels; Index++)
    {
        Result = BChannelCreate(&pAdapter->pBChannelArray[Index],
                                Index,
                                pAdapter);

        /*
        // Put entry on available list.
        */
        InsertTailList(&pAdapter->BChannelAvailableList,
                       &pAdapter->pBChannelArray[Index]->LinkList);

        /*
        // Keep track of how many are created.
        */
        if (Result == NDIS_STATUS_SUCCESS)
        {
            pAdapter->NumBChannels++;
        }
    }

    DBG_RETURN(DbgInfo, Result);
    return (Result);
}


/* @doc INTERNAL Adapter Adapter_c AdapterCreate
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@func

    <f AdapterCreate> allocates memory for a <t MINIPORT_ADAPTER_OBJECT> and
    then initializes the data members to their starting state.
    If successful, <p ppAdapter> will be set to point to the newly created
    <t MINIPORT_ADAPTER_OBJECT>.  Otherwise, <p ppAdapter> will be set to
    NULL.

@comm

    This function should be called only once when the Miniport is loaded.
    Before the Miniport is unloaded, <f AdapterDestroy> must be called to
    release the <t MINIPORT_ADAPTER_OBJECT> created by this function.

@rdesc

    <f AdapterCreate> returns zero if it is successful.<nl>
    Otherwise, a non-zero return value indicates an error condition.

*/

NDIS_STATUS AdapterCreate(
    OUT PMINIPORT_ADAPTER_OBJECT *ppAdapter,                // @parm
    // Points to a caller-defined memory location to which this function
    // writes the virtual address of the allocated <t MINIPORT_ADAPTER_OBJECT>.

    IN NDIS_HANDLE              MiniportAdapterHandle,      // @parm
    // Specifies a handle identifying the miniport's NIC, which is assigned
    // by the NDIS library. MiniportInitialize should save this handle; it
    // is a required parameter in subsequent calls to NdisXxx functions.

    IN NDIS_HANDLE              WrapperConfigurationContext // @parm
    // Specifies a handle used only during initialization for calls to
    // NdisXxx configuration and initialization functions.  For example,
    // this handle is a required parameter to NdisOpenConfiguration and
    // the NdisImmediateReadXxx and NdisImmediateWriteXxx functions.
    )
{
    DBG_FUNC("AdapterCreate")

    NDIS_STATUS                 Result;
    // Holds the result code returned by this function.

    PMINIPORT_ADAPTER_OBJECT    pAdapter;
    // Pointer to our newly allocated object.

    DBG_ENTER(DbgInfo);

    /*
    // Make sure the caller's object pointer is NULL to begin with.
    // It will be set later only if everything is successful.
    */
    *ppAdapter = NULL;

    /*
    // Allocate memory for the object.
    */
    Result = ALLOCATE_OBJECT(pAdapter, MiniportAdapterHandle);

    if (Result == NDIS_STATUS_SUCCESS)
    {
        /*
        // Zero everything to begin with.
        // Then set the object type and assign a unique ID .
        */
        pAdapter->ObjectType = MINIPORT_ADAPTER_OBJECT_TYPE;
        pAdapter->ObjectID = ++g_AdapterInstanceCounter;
        ASSERT(g_AdapterInstanceCounter <= MAX_ADAPTERS);
        if (g_AdapterInstanceCounter <= MAX_ADAPTERS)
        {
            g_Adapters[g_AdapterInstanceCounter-1] = pAdapter;
        }

        /*
        // We use the instance number in debug messages to help when debugging
        // with multiple adapters.
        */
#if DBG
        pAdapter->DbgID[0] = (UCHAR) ((pAdapter->ObjectID & 0x0F) + '0');
        pAdapter->DbgID[1] = ':';
        if (sizeof(VER_TARGET_STR) < sizeof(pAdapter->DbgID)-3)
        {
            memcpy(&pAdapter->DbgID[2], VER_TARGET_STR, sizeof(VER_TARGET_STR));
        }
        else
        {
            memcpy(&pAdapter->DbgID[2], VER_TARGET_STR, sizeof(pAdapter->DbgID)-3);
            pAdapter->DbgID[sizeof(pAdapter->DbgID)-1] = 0;
        }
#endif
        /*
        // Initialize the member variables to their default settings.
        */
        pAdapter->MiniportAdapterHandle = MiniportAdapterHandle;
        pAdapter->WrapperConfigurationContext = WrapperConfigurationContext;

        /*
        // Allocate spin locks to use for MUTEX queue protection.
        */
        NdisAllocateSpinLock(&pAdapter->EventLock);
        NdisAllocateSpinLock(&pAdapter->TransmitLock);
        NdisAllocateSpinLock(&pAdapter->ReceiveLock);

        /*
        // Parse the registry parameters.
        */
        Result = AdapterReadParameters(pAdapter);
#if DBG
        // DbgInfo->DbgFlags = pAdapter->DbgFlags;
#endif // DBG
        DBG_DISPLAY(("NOTICE: Adapter#%d=0x%X DbgFlags=0x%X\n",
                    pAdapter->ObjectID, pAdapter, pAdapter->DbgFlags));

        /*
        // If all goes well, we are ready to create the sub-components.
        */
        if (Result == NDIS_STATUS_SUCCESS)
        {
            Result = AdapterCreateObjects(pAdapter);
        }

        if (Result == NDIS_STATUS_SUCCESS)
        {
            /*
            // All is well, so return the object pointer to the caller.
            */
            *ppAdapter = pAdapter;
        }
        else
        {
            /*
            // Something went wrong, so let's make sure everything is
            // cleaned up.
            */
            AdapterDestroy(pAdapter);
        }
    }

    DBG_RETURN(DbgInfo, Result);
    return (Result);
}


/* @doc INTERNAL Adapter Adapter_c AdapterDestroyObjects
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@func

    <f AdapterDestroyObjects> calls the destroy routines for all the objects
    contained in <t MINIPORT_ADAPTER_OBJECT>.  This should only be called
    by <f AdapterDestroy>.

    <f Note>:
    If you add any new objects to <t MINIPORT_ADAPTER_OBJECT> you will need
    to modify <f AdapterCreateObjects> and <f AdapterDestroyObjects> so they
    will get created and destroyed properly.

*/

DBG_STATIC void AdapterDestroyObjects(
    IN PMINIPORT_ADAPTER_OBJECT pAdapter                    // @parm
    // A pointer to the <t MINIPORT_ADAPTER_OBJECT> instance return by
    // <f AdapterCreate>.
    )
{
    DBG_FUNC("AdapterDestroyObjects")

    UINT                        NumBChannels;
    // The number of BChannels supported by the NIC.

    ASSERT(pAdapter && pAdapter->ObjectType == MINIPORT_ADAPTER_OBJECT_TYPE);
    DBG_ENTER(DbgInfo);

    /*
    // Destroy the BChannel objects.
    */
    NumBChannels = pAdapter->NumBChannels;
    while (NumBChannels--)
    {
        BChannelDestroy(pAdapter->pBChannelArray[NumBChannels]);
    }
    pAdapter->NumBChannels = 0;

    /*
    // Free space for the BChannels.
    */
    if (pAdapter->pBChannelArray)
    {
        NumBChannels = CardNumChannels(pAdapter->pCard);
        FREE_MEMORY(pAdapter->pBChannelArray, sizeof(PVOID) * NumBChannels);
    }

    /*
    // Destroy the DChannel object.
    */
    DChannelDestroy(pAdapter->pDChannel);

    /*
    // Destroy the Card object.
    */
    CardDestroy(pAdapter->pCard);

    DBG_LEAVE(DbgInfo);
}


/* @doc INTERNAL Adapter Adapter_c AdapterDestroy
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@func

    <f AdapterDestroy> frees the memory for this <t MINIPORT_ADAPTER_OBJECT>.
    All memory allocated by <f AdapterCreate> will be released back to the OS.

*/

void AdapterDestroy(
    IN PMINIPORT_ADAPTER_OBJECT pAdapter                    // @parm
    // A pointer to the <t MINIPORT_ADAPTER_OBJECT> instance return by
    // <f AdapterCreate>.
    )
{
    DBG_FUNC("AdapterDestroy")

    DBG_ENTER(DbgInfo);

    if (pAdapter)
    {
        ASSERT(pAdapter->ObjectType == MINIPORT_ADAPTER_OBJECT_TYPE);

        /*
        // Release all objects allocated within this object.
        */
        AdapterDestroyObjects(pAdapter);

        if (pAdapter->EventLock.SpinLock)
        {
            NdisFreeSpinLock(&pAdapter->EventLock);
        }

        if (pAdapter->TransmitLock.SpinLock)
        {
            NdisFreeSpinLock(&pAdapter->TransmitLock);
        }

        if (pAdapter->ReceiveLock.SpinLock)
        {
            NdisFreeSpinLock(&pAdapter->ReceiveLock);
        }

        /*
        // Make sure we fail the ASSERT if we see this object again.
        */
        if (pAdapter->ObjectType <= MAX_ADAPTERS)
        {
            g_Adapters[pAdapter->ObjectType-1] = NULL;
        }
        pAdapter->ObjectType = 0;
        FREE_OBJECT(pAdapter);
    }

    DBG_LEAVE(DbgInfo);
}


/* @doc INTERNAL Adapter Adapter_c AdapterInitialize
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@func

    <f AdapterInitialize> prepares the <t MINIPORT_ADAPTER_OBJECT> and all
    its sub-components for use by the NDIS wrapper.  Upon successful
    completion of this routine, the NIC will be ready to accept requests
    from the NDIS wrapper.

@rdesc

    <f AdapterInitialize> returns zero if it is successful.<nl>
    Otherwise, a non-zero return value indicates an error condition.

*/

NDIS_STATUS AdapterInitialize(
    IN PMINIPORT_ADAPTER_OBJECT pAdapter                    // @parm
    // A pointer to the <t MINIPORT_ADAPTER_OBJECT> instance return by
    // <f AdapterCreate>.
    )
{
    DBG_FUNC("AdapterInitialize")

    NDIS_STATUS                 Result;
    // Holds the result code returned by this function.

    PBCHANNEL_OBJECT            pBChannel;
    // A Pointer to one of our <t BCHANNEL_OBJECT>'s.

    ULONG                       Index;
    // Loop counter.

    ASSERT(pAdapter && pAdapter->ObjectType == MINIPORT_ADAPTER_OBJECT_TYPE);
    DBG_ENTER(pAdapter);

    /*
    // Initialize the WAN information structure to match the capabilities of
    // the adapter.
    */
    pAdapter->WanInfo.MaxFrameSize   = pAdapter->pCard->BufferSize - NDISWAN_EXTRA_SIZE;
    pAdapter->WanInfo.MaxSendWindow  = pAdapter->pCard->TransmitBuffersPerLink;

    /*
    // We only support PPP, and multi-link PPP framing.
    */
    pAdapter->WanInfo.FramingBits    = PPP_FRAMING |
                                       PPP_MULTILINK_FRAMING;

    /*
    // This value is ignored by this driver, but its default behavior is such
    // that all these control bytes would appear to be handled transparently.
    */
    pAdapter->WanInfo.DesiredACCM    = 0;

    /*
    // Initialize the packet management queues to empty.
    */
    InitializeListHead(&pAdapter->EventList);
    InitializeListHead(&pAdapter->TransmitPendingList);
    InitializeListHead(&pAdapter->TransmitCompleteList);
    InitializeListHead(&pAdapter->ReceiveCompleteList);

    /*
    // Setup the timer event handler.
    */
    NdisMInitializeTimer(&pAdapter->EventTimer,
                         pAdapter->MiniportAdapterHandle,
                         MiniportTimer,
                         pAdapter);

    /*
    // Initialize the DChannel object.
    */
    DChannelInitialize(pAdapter->pDChannel);

    /*
    // Initialize all the BChannel objects.
    */
    for (Index = 0; Index < pAdapter->NumBChannels; ++Index)
    {
        pBChannel = GET_BCHANNEL_FROM_INDEX(pAdapter, Index);
        BChannelInitialize(pBChannel);
    }

    /*
    // Now, we can initialize the Card object.
    */
    Result = CardInitialize(pAdapter->pCard);

    DBG_RETURN(pAdapter, Result);
    return (Result);
}