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csx_event_handler - PC Card driver event handler

#include <sys/pccard.h>



int32_t prefixevent_handler(event_t event, int32_t priority,
 event_callback_args_t *args);

illumos architecture specific (illumos DDI) event priority args Each instance of a PC Card driver must register an event handler to manage events associated with its PC Card. The driver event handler is registered using the event_handler field of the client_req_t structure passed to csx_RegisterClient(9F). The driver may also supply a parameter to be passed to its event handler function using the event_callback_args.client_data field. Typically, this argument is the driver instance's soft state pointer. The driver also registers which events it is interested in receiving through the EventMask field of the client_req_t structure.

Each event is delivered to the driver with a priority, priority. High priority events with CS_EVENT_PRI_HIGH set in priority are delivered above lock level, and the driver must use its high-level event mutex initialized with the iblk_cookie returned by csx_RegisterClient(9F) to protect such events. Low priority events with CS_EVENT_PRI_LOW set in priority are delivered below lock level, and the driver must use its low-level event mutex initialized with a NULL interrupt cookie to protect these events.

csx_RegisterClient(9F) registers the driver's event handler, but no events begin to be delivered to the driver until after a successful call to csx_RequestSocketMask(9F).

In all cases, Card Services delivers an event to each driver instance associated with a function on a multiple function PC Card.

The events and their indications are listed below; they are always delivered as low priority unless otherwise noted: CS_EVENT_REGISTRATION_COMPLETE CS_EVENT_CARD_INSERTION CS_EVENT_CARD_READY CS_EVENT_CARD_REMOVAL CS_EVENT_BATTERY_LOW CS_EVENT_BATTERY_DEAD CS_EVENT_PM_RESUME CS_EVENT_PM_SUSPEND CS_EVENT_CARD_LOCK CS_EVENT_CARD_UNLOCK CS_EVENT_EJECTION_REQUEST CS_EVENT_EJECTION_COMPLETE CS_EVENT_ERASE_COMPLETE CS_EVENT_INSERTION_REQUEST CS_EVENT_INSERTION_COMPLETE CS_EVENT_CARD_RESET CS_EVENT_RESET_REQUEST CS_EVENT_RESET_COMPLETE CS_EVENT_RESET_PHYSICAL CS_EVENT_CLIENT_INFO CS_EVENT_WRITE_PROTECT The structure members of event_callback_args_t are:

void *info; /* event-specific information */
void *client_data; /* driver-private data */
client_info_t client_info; /* client information*/

The structure members of client_info_t are:

unit32_t Attributes; /* attributes */
unit32_t Revisions; /* version number */
uint32_t CSLevel; /* Card Services version */
uint32_t RevDate; /* revision date */
char ClientName[CS_CLIENT_INFO_MAX_NAME_LEN];
 /*PC Card driver description */
char VendorName[CS_CLIENT_INFO_MAX_NAME_LEN];
 /*PC Card driver vendor name */
char DriverName[MODMAXNAMELEN];
 /* PC Card driver name */

CS_SUCCESS CS_UNSUPPORTED_EVENT CS_FAILURE This function is called from high-level interrupt context in the case of high priority events, and from kernel context in the case of low priority events.

static int
xx_event(event_t event, int priority, event_callback_args_t *args)
{
 int rval;
 struct xxx *xxx = args->client_data;
 client_info_t *info = &args->client_info;

 switch (event) {
 case CS_EVENT_REGISTRATION_COMPLETE:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 xxx->card_state |= XX_REGISTRATION_COMPLETE;
 mutex_exit(&xxx->event_mutex);
 rval = CS_SUCCESS;
 break;

 case CS_EVENT_CARD_READY:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 rval = xx_card_ready(xxx);
 mutex_exit(&xxx->event_mutex);
 break;

 case CS_EVENT_CARD_INSERTION:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 rval = xx_card_insertion(xxx);
 mutex_exit(&xxx->event_mutex);
 break;

 case CS_EVENT_CARD_REMOVAL:
 if (priority & CS_EVENT_PRI_HIGH) {
 mutex_enter(&xxx->hi_event_mutex);
 xxx->card_state &= ~XX_CARD_PRESENT;
 mutex_exit(&xxx->hi_event_mutex);
 } else {
 mutex_enter(&xxx->event_mutex);
 rval = xx_card_removal(xxx);
 mutex_exit(&xxx->event_mutex);
 }
 break;

 case CS_EVENT_CLIENT_INFO:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 if (GET_CLIENT_INFO_SUBSVC_CS(info->Attributes) ==
 CS_CLIENT_INFO_SUBSVC_CS) {
 info->Attributes |= CS_CLIENT_INFO_VALID;
 info->Revision = 4;
 info->CSLevel = CS_VERSION;
 info->RevDate = CS_CLIENT_INFO_MAKE_DATE(4, 7, 17);
 (void)strncpy(info->ClientName,
 "WhizBang Ultra Zowie PC card driver",
 CS_CLIENT_INFO_MAX_NAME_LEN)

 "ACME PC card drivers, Inc.",
 CS_CLIENT_INFO_MAX_NAME_LEN);
 rval = CS_SUCCESS;
 } else {
 rval = CS_UNSUPPORTED_EVENT;
 }
 break;


 case CS_EVENT_WRITE_PROTECT:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 if (args->info == CS_EVENT_WRITE_PROTECT_WPOFF) {
 xxx->card_state &= ~XX_WRITE_PROTECTED;
 } else {
 xxx->card_state |= XX_WRITE_PROTECTED;
 }
 mutex_exit(&xxx->event_mutex);
 rval = CS_SUCCESS;
 break;

 default:
 rval = CS_UNSUPPORTED_EVENT;
 break;
 }

 return (rval);
}

csx_Event2Text(9F), csx_RegisterClient(9F), csx_RequestSocketMask(9F)

PC Card 95 Standard, PCMCIA/JEIDA