drivers/staging/tidspbridge/Documentation/error-codes

   1                         DSP/Bridge Error Code Guide
   2
   3
   4 Success code is always taken as 0, except for one case where a success status
   5 different than 0 can be possible, this is when enumerating a series of dsp
   6 objects, if the enumeration doesn't have any more objects it is considered as a
   7 successful case. In this case a positive ENODATA is returned (TODO: Change to
   8 avoid this case).
   9
  10 Error codes are returned as a negative 1, if an specific code is expected, it
  11 can be propagated to user space by reading errno symbol defined in errno.h, for
  12 specific details on the implementation a copy of the standard used should be
  13 read first.
  14
  15 The error codes used by this driver are:
  16
  17 [EPERM]
  18     General driver failure.
  19
  20     According to the use case the following might apply:
  21     - Device is in 'sleep/suspend' mode due to DPM.
  22     - User cannot mark end of stream on an input channel.
  23     - Requested operation is invalid for the node type.
  24     - Invalid alignment for the node messaging buffer.
  25     - The specified direction is invalid for the stream.
  26     - Invalid stream mode.
  27
  28 [ENOENT]
  29     The specified object or file was not found.
  30
  31 [ESRCH]
  32     A shared memory buffer contained in a message or stream could not be mapped
  33     to the GPP client process's virtual space.
  34
  35 [EIO]
  36     Driver interface I/O error.
  37
  38     or:
  39     - Unable to plug channel ISR for configured IRQ.
  40     - No free I/O request packets are available.
  41
  42 [ENXIO]
  43     Unable to find a named section in DSP executable or a non-existent memory
  44     segment identifier was specified.
  45
  46 [EBADF]
  47     General error for file handling:
  48
  49     - Unable to open file.
  50     - Unable to read file.
  51     - An error occurred while parsing the DSP executable file.
  52
  53 [ENOMEM]
  54     A memory allocation failure occurred.
  55
  56 [EACCES]
  57     - Unable to read content of DCD data section; this is typically caused by
  58     improperly configured nodes.
  59     - Unable to decode DCD data section content; this is typically caused by
  60     changes to DSP/BIOS Bridge data structures.
  61     - Unable to get pointer to DCD data section; this is typically caused by
  62     improperly configured UUIDs.
  63     - Unable to load file containing DCD data section; this is typically
  64     caused by a missing COFF file.
  65     - The specified COFF file does not contain a valid node registration
  66     section.
  67
  68 [EFAULT]
  69     Invalid pointer or handler.
  70
  71 [EEXIST]
  72     Attempted to create a channel manager  when one already exists.
  73
  74 [EINVAL]
  75     Invalid argument.
  76
  77 [ESPIPE]
  78     Symbol not found in the COFF file.  DSPNode_Create will return this if
  79     the iAlg function table for an xDAIS socket is not found in the COFF file.
  80     In this case, force the symbol to be linked into the COFF file.
  81     DSPNode_Create, DSPNode_Execute, and DSPNode_Delete will return this if
  82     the create, execute, or delete phase function, respectively, could not be
  83     found in the COFF file.
  84
  85     - No symbol table is loaded/found for this board.
  86     - Unable to initialize the ZL COFF parsing module.
  87
  88 [EPIPE]
  89     I/O is currently pending.
  90
  91     - End of stream was already requested on this output channel.
  92
  93 [EDOM]
  94     A parameter is specified outside its valid range.
  95
  96 [ENOSYS]
  97     The indicated operation is not supported.
  98
  99 [EIDRM]
 100     During enumeration a change in the number or properties of the objects
 101     has occurred.
 102
 103 [ECHRNG]
 104     Attempt to created channel manager with too many channels or channel ID out
 105     of range.
 106
 107 [EBADR]
 108     The state of the specified object is incorrect for the requested operation.
 109
 110     - Invalid segment ID.
 111
 112 [ENODATA]
 113     Unable to retrieve resource information from the registry.
 114
 115     - No more registry values.
 116
 117 [ETIME]
 118     A timeout occurred before the requested operation could complete.
 119
 120 [ENOSR]
 121     A stream has been issued the maximum number of buffers allowed in the
 122     stream at once; buffers must be reclaimed from the stream before any more
 123     can be issued.
 124
 125     - No free channels are available.
 126
 127 [EILSEQ]
 128     Error occurred in a dynamic loader library function.
 129
 130 [EISCONN]
 131     The Specified Connection already exists.
 132
 133 [ENOTCONN]
 134     Nodes not connected.
 135
 136 [ETIMEDOUT]
 137     Timeout occurred waiting for a response from the hardware.
 138
 139     - Wait for flush operation on an output channel timed out.
 140
 141 [ECONNREFUSED]
 142     No more connections can be made for this node.
 143
 144 [EALREADY]
 145     Channel is already in use.
 146
 147 [EREMOTEIO]
 148     dwTimeOut parameter was CHNL_IOCNOWAIT, yet no I/O completions were
 149     queued.
 150
 151 [ECANCELED]
 152     I/O has been cancelled on this channel.
 153
 154 [ENOKEY]
 155     Invalid subkey parameter.
 156
 157     - UUID not found in registry.