csx_RequestIRQ, csx_ReleaseIRQ - request or release IRQ resource
int32_t csx_RequestIRQ(client_handle_t ch, irq_req_t *ir);
int32_t csx_ReleaseIRQ(client_handle_t ch, irq_req_t *ir);
Solaris DDI Specific (Solaris DDI)
Client handle returned from csx_RegisterClient(9F).
Pointer to an irq_req_t structure.
The function csx_RequestIRQ() requests an IRQ resource and registers
the client's IRQ handler with Card Services.
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 call‐
back handler until csx_RequestConfiguration(9F) or csx_ModifyConfigura‐
tion(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
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 Solaris operations that are appro‐
priate for an above-lock-level IRQ handler.
csx_RequestIRQ() fails if it has already been called without a corre‐
The structure members of irq_req_t are:
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:
Not used in Solaris, but for portability with other
Card Services implementations, it should be set to
the logical socket number.
This field is bit-mapped. It specifies details
about the type of IRQ desired by the client. The
following bits are defined:
IRQ is exclusive to this
socket. This bit must be set.
It indicates that the system
IRQ is dedicated to this PC
The client IRQ callback handler entry point is
passed in the irq_handler field.
The client can use the irq_handler_arg field to
pass client-specific data to the client IRQ call‐
These fields must be used by the client to set up
mutexes that are used in the client's IRQ callback
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
IRQ description does not match allocation.
IRQ_TYPE_EXCLUSIVE not set, or an unsup‐
ported or reserved bit is set.
Client handle is invalid or csx_RequestCon‐
figuration(9F) not done.
Unable to allocate IRQ resources.
csx_RequestIRQ() already done or a previous
csx_RequestIRQ() has not been done for a
csx_RequestConfiguration(9F) already done
or csx_ReleaseConfiguration(9F) has not
No PC Card in socket.
No PCMCIA hardware installed.
These functions may be called from user or kernel context.
SEE ALSOcsx_ReleaseConfiguration(9F), csx_RequestConfiguration(9F)
PC Card Card 95 Standard, PCMCIA/JEIDA
Jul 19, 1996 CSX_REQUESTIRQ(9F)