xref: /illumos-gate/usr/src/man/man9f/csx_CS_DDI_Info.9f (revision e3ae4b35c024af1196582063ecee3ab79367227d)
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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