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 Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved
 The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
 You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
 When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
 CSX_CS_DDI_INFO 9F "Jul 19, 1996"
 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
illumos DDI Specific (illumos DDI) 

 PARAMETERS
cdi 


Pointer to a cs_ddi_info_t structure.




 DESCRIPTION
This function is an illumos-specific extension that is used by clients that need
to provide the xx_getinfo driver entry point (see getinfo(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 argument 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