snd_pcm_lib_ioctl(9) [centos man page]

SND_PCM_LIB_IOCTL(9)						      PCM API						      SND_PCM_LIB_IOCTL(9)

NAME

       snd_pcm_lib_ioctl - a generic PCM ioctl callback

SYNOPSIS

       int snd_pcm_lib_ioctl(struct snd_pcm_substream * substream, unsigned int cmd, void * arg);

ARGUMENTS

       substream
	   the pcm substream instance

       cmd
	   ioctl command

       arg
	   ioctl argument

DESCRIPTION

       Processes the generic ioctl commands for PCM. Can be passed as the ioctl callback for PCM ops.

RETURN

       Zero if successful, or a negative error code on failure.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						      SND_PCM_LIB_IOCTL(9)

ldi_ioctl(9F)						   Kernel Functions for Drivers 					     ldi_ioctl(9F)

NAME

       ldi_ioctl - Send an ioctl to a device

SYNOPSIS

       #include <sys/sunldi.h>

       int ldi_ioctl(ldi_handle_t lh, int cmd, intptr_t arg, int mode, cred_t  *cr, int *rvalp);

PARAMETERS

       lh	       Layered handle.

       cr	       Pointer to a credential structure used to open a device.

       rvalp	       Caller return value. (May be set by driver and is valid only if the ioctl() succeeds).

       cmd	       Command argument. Interpreted by driver ioctl() as the operation to be performed.

       arg	       Driver parameter. Argument interpretation is driver dependent and usually depends on the command type.

       mode	       Bit field that contains:

		       FKIOCTL	       Inform the target device that the ioctl originated from within the kernel.

DESCRIPTION

       The  ldi_ioctl()  function passes an ioctl request to the device entry point for the device specified by the layered handle. This operation
       is supported for block, character, and streams devices.

       If arg is interpreted  as a pointer (that is, as not an immediate value) and the data pointed to by arg is in the  kernels  address  space,
       the FKIOCTL flag should be set. This indicates to the target driver that no data model conversion is necessary.

       If the caller of ldi_ioctl() is not the originator of the ioctl data pointed to by arg, (for example, when passing on an ioctl request from
       a userland process), the caller must pass on the mode parameter from the original ioctl. This is because the mode  parameter  contains  the
       contains  the FMODELS bits which enable the target driver to determine the data model of the process which originated the ioctl and perform
       any necessary conversions. See ddi_model_convert_from(9F) for more information.

STREAM IOCTLS

       For a general description of streams ioctls see streamio(7I). ldi_ioctl() supports a number of streams ioctls, using layered handles in the
       place  of file descriptors. When issuing streams ioctls the FKIOCTL parameter should be specified. The possible return values for supported
       ioctl commands are also documented in streamio(7I).

       The following streams ioctls are supported:

       I_PLINK		       Behaves as documented in streamio(7I). The layered handle lh should point  to  the  streams  multiplexer.  The  arg
			       parameter should point to a layered handle for another streams driver.

       I_UNPLINK	       Behaves	as  documented	in  streamio(7I)).  The layered handle lh should point to the streams multiplexer. The arg
			       parameter is the multiplexor ID number returned by I_PLINK when the streams were linked.

RETURN VALUES

       The ldi_ioctl() function returns 0 upon success. If a failure occurs before the request is passed on to the device, possible return  values
       are shown below. Otherwise any other error number may be returned by the device.

       EINVAL	       Invalid input parameters.

       ENOTSUP	       Operation is not supported for this device.

CONTEXT

       These functions may be called from user or kernel context.

SunOS 5.10							    3 June 2003 						     ldi_ioctl(9F)