|CSX_REQUESTIRQ(9F)||Kernel Functions for Drivers||CSX_REQUESTIRQ(9F)|
#include <sys/pccard.h> int32_t csx_RequestIRQ(client_handle_t ch, irq_req_t *ir);
int32_t csx_ReleaseIRQ(client_handle_t ch, irq_req_t *ir);
If a client requires an IRQ,csx_RequestIRQ() must be called to request an IRQ resource as well as to register the client's IRQ handler with Card Services. The client will not receive callbacks at the IRQ callback handler until csx_RequestConfiguration(9F) or csx_ModifyConfiguration(9F) has successfully returned when either of these functions are called with the CONF_ENABLE_IRQ_STEERING bit set.
The function csx_ReleaseIRQ() releases a previously requested IRQ resource.
The Card Services IRQ resource list is adjusted by csx_ReleaseIRQ(). Depending on the adapter hardware, the host bus IRQ connection might also be disabled. Client IRQ handlers always run above lock level and so should take care to perform only illumos operations that are appropriate for an above-lock-level IRQ handler.
csx_RequestIRQ() fails if it has already been called without a corresponding csx_ReleaseIRQ().
uint32_t Socket; /* socket number */ uint32_t Attributes; /* IRQ attribute flags */ csfunction_t *irq_handler; /* IRQ handler */ void *irq_handler_arg; /* IRQ handler argument */ ddi_iblock_cookie_t *iblk_cookie; /* IRQ interrupt /* block cookie */ ddi_idevice_cookie_t *idev_cookie; /* IRQ interrupt device /* cookie */
The fields are defined as follows:
For a specific csx_ReleaseIRQ() call, the values in the irq_req_t structure must be the same as those returned from the previous csx_RequestIRQ() call; otherwise, CS_BAD_ARGS is returned and no changes are made to Card Services resources or the socket and adapter hardware.
PC Card Card 95 Standard, PCMCIA/JEIDA
|July 19, 1996||OmniOS|