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)

ARGUMENTS

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 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 * argargument 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

The following example shows how a client might call 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