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

NAME

       csx_CS_DDI_Info - obtain DDI information

SYNOPSIS

       #include <sys/pccard.h>

       int32_t csx_CS_DDI_Info(cs_ddi_info_t *cdi);

INTERFACE LEVEL

       Solaris DDI Specific (Solaris DDI)

PARAMETERS

       cdi	Pointer to a cs_ddi_info_t structure.

DESCRIPTION

       This  function  is  a  Solaris-specific	extension that is used by clients that need to provide the xx_getinfo driver entry point (see get-
       info(9E)). It provides a method for clients to obtain DDI information based on their socket number and client driver name.

STRUCTURE MEMBERS

       The structure members of cs_ddi_info_t are:

       uint32_t     Socket;	   /* socket number */
       char*	    driver_name;   /* unique driver name */
       dev_info_t   *dip;	   /* dip */
       int32_t	    instance;	   /* instance */

       The fields are defined as follows:

       Socket	       This field must be set to the physical socket number that the client is interested in getting information about.

       driver_name     This field must be set to a string containing the name of the client driver to get information about.

       If csx_CS_DDI_Info() is used in a client's xx_getinfo function, then the client will typically extract the Socket value from the *arg argu-
       ment and it must set the driver_name field to the same string used with csx_RegisterClient(9F).

       If the driver_name is found on the Socket, the csx_CS_DDI_Info() function returns both the dev_info pointer and the instance fields for the
       requested driver instance.

RETURN VALUES

       CS_SUCCESS		       Successful operation.

       CS_BAD_SOCKET		       Client not found on Socket.

       CS_UNSUPPORTED_FUNCTION	       No PCMCIA hardware installed.

CONTEXT

       This function may be called from user or kernel context.

EXAMPLES

       Example 1: : Using csx_CS_DDI_Info

       The following example shows how a client might call the csx_CS_DDI_Info() in the client's xx_getinfo function to  return  the  dip  or  the
       instance number:

       static int
       pcepp_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
							    void **result)
       {
	       int			    error = DDI_SUCCESS;
	       pcepp_state_t		    *pps;
	       cs_ddi_info_t		    cs_ddi_info;

	  switch (cmd) {

	       case DDI_INFO_DEVT2DEVINFO:
		 cs_ddi_info.Socket = getminor((dev_t)arg) & 0x3f;
		 cs_ddi_info.driver_name = pcepp_name;
		 if (csx_CS_DDI_Info(&cs_ddi_info) != CS_SUCCESS)
			  return (DDI_FAILURE);
		 if (!(pps = ddi_get_soft_state(pcepp_soft_state_p,
			       cs_ddi_info.instance))) {
			   *result = NULL;
		 } else {
			   *result = pps->dip;
		 }
		 break;

	       case DDI_INFO_DEVT2INSTANCE:
		 cs_ddi_info.Socket = getminor((dev_t)arg) & 0x3f;
		 cs_ddi_info.driver_name = pcepp_name;
		 if (csx_CS_DDI_Info(&cs_ddi_info) != CS_SUCCESS)
				return (DDI_FAILURE);
		 *result = (void *)cs_ddi_info.instance;
		 break;

	       default:
		 error = DDI_FAILURE;
		 break;

	  }

	       return (error);
       }

SEE ALSO

       getinfo(9E), csx_RegisterClient(9F), ddi_get_instance(9F)

       PC Card 95 Standard, PCMCIA/JEIDA

SunOS 5.10							    19 Jul 1996 					       csx_CS_DDI_Info(9F)