Manual Pages for UNIX Operating System command usage for man usb_pipe_get_max_bulk_transfer_size

Kernel Functions for Drivers
                          usb_pipe_get_max_bulk_transfer_size(9F)



NAME
     usb_pipe_get_max_bulk_transfer_size  -  Get   maximum   bulk
     transfer size

SYNOPSIS
     #include 

     int usb_pipe_get_max_bulk_transfer_size(dev_info_t dip, size_t *size);


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI)

PARAMETERS
     dip     Pointer to the device's dev_info structure.


     size    Returns the bulk transfer size.


DESCRIPTION
     The usb_pipe_get_max_bulk_transfer_size()  function  returns
     the  maximum  data transfer size in bytes that the host con-
     troller driver can support per bulk request.  This  informa-
     tion  can  be used to limit or break down larger requests to
     manageable sizes.

RETURN VALUES
     USB_SUCCESS         Size is returned in size argument.


     USB_INVALID_ARGS    dip and/or size argument is NULL.


     USB_FAILURE         Size could  not  be  returned.  Zero  is
                         returned in size arg.


CONTEXT
     May be called from user, kernel or interrupt context.

EXAMPLES
           int xxx_attach(dev_info_t *dip, int command)
           {
                  ...
                  usb_pipe_get_max_bulk_transfer_size(dip, &state>max_xfer_size);
                  ...
           }

           void xxx_minphys(struct buf bp)
           {



SunOS 5.11           Last change: 5 Jan 2004                    1






Kernel Functions for Drivers
                          usb_pipe_get_max_bulk_transfer_size(9F)



                  ...
                  if (bp->b_bcount > state->max_xfer_size) {
                          bp->b_bcount = state->max_xfer_size;
                  }
                  ...
           }




ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Architecture                | PCI-based systems           |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | Availability                | driver/usb                  |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5),                       usb_pipe_bulk_xfer(9F),
     usb_alloc_request(9F), usb_bulk_request(9S)
























SunOS 5.11           Last change: 5 Jan 2004                    2






Kernel Functions for Drivers
                          usb_pipe_get_max_bulk_transfer_size(9F)






















































SunOS 5.11           Last change: 5 Jan 2004                    3