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csx_CS_DDI_Info (9)

>> csx_CS_DDI_Info (9) ( Solaris man: Ядро )

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 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);
}