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Kernel Functions for Drivers

csx_CS_DDI_Info(9F)

INTERFACE LEVEL
PARAMETERS
DESCRIPTION
STRUCTURE MEMBERS
RETURN VALUES
CONTEXT
EXAMPLES
SEE ALSO

NAME

csx_CS_DDI_Info - obtain DDI information

SYNOPSIS

#include <sys/pccard.h> int32_t csx_CS_DDI_Info(cs_ddi_info_t *cdi);

PARAMETERS

cdi: Pointer to a cs_ddi_info_t structure.

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 *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); }