s390/airq: simplify adapter interrupt code
There are three users of adapter interrupts: AP, QDIO and PCI. Each
registers a single adapter interrupt with independent ISCs. Define
a "struct airq" with the interrupt handler, a pointer and a mask for
the local summary indicator and the ISC for the adapter interrupt
source. Convert the indicator array with its fixed number of adapter
interrupt sources per ISE to an array of hlists. This removes the
limitation to 32 adapter interrupts per ISC and allows for arbitrary
memory locations for the local summary indicator.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 417b255..5d06253 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -36,8 +36,13 @@
static LIST_HEAD(tiq_list);
static DEFINE_MUTEX(tiq_list_lock);
-/* adapter local summary indicator */
-static u8 *tiqdio_alsi;
+/* Adapter interrupt definitions */
+static void tiqdio_thinint_handler(struct airq_struct *airq);
+
+static struct airq_struct tiqdio_airq = {
+ .handler = tiqdio_thinint_handler,
+ .isc = QDIO_AIRQ_ISC,
+};
static struct indicator_t *q_indicators;
@@ -176,7 +181,7 @@
* @alsi: pointer to adapter local summary indicator
* @data: NULL
*/
-static void tiqdio_thinint_handler(void *alsi, void *data)
+static void tiqdio_thinint_handler(struct airq_struct *airq)
{
u32 si_used = clear_shared_ind();
struct qdio_q *q;
@@ -216,7 +221,7 @@
summary_indicator_addr = 0;
subchannel_indicator_addr = 0;
} else {
- summary_indicator_addr = virt_to_phys(tiqdio_alsi);
+ summary_indicator_addr = virt_to_phys(tiqdio_airq.lsi_ptr);
subchannel_indicator_addr = virt_to_phys(irq_ptr->dsci);
}
@@ -252,14 +257,12 @@
int __init tiqdio_register_thinints(void)
{
- isc_register(QDIO_AIRQ_ISC);
- tiqdio_alsi = s390_register_adapter_interrupt(&tiqdio_thinint_handler,
- NULL, QDIO_AIRQ_ISC);
- if (IS_ERR(tiqdio_alsi)) {
- DBF_EVENT("RTI:%lx", PTR_ERR(tiqdio_alsi));
- tiqdio_alsi = NULL;
- isc_unregister(QDIO_AIRQ_ISC);
- return -ENOMEM;
+ int rc;
+
+ rc = register_adapter_interrupt(&tiqdio_airq);
+ if (rc) {
+ DBF_EVENT("RTI:%x", rc);
+ return rc;
}
return 0;
}
@@ -292,9 +295,5 @@
void __exit tiqdio_unregister_thinints(void)
{
WARN_ON(!list_empty(&tiq_list));
-
- if (tiqdio_alsi) {
- s390_unregister_adapter_interrupt(tiqdio_alsi, QDIO_AIRQ_ISC);
- isc_unregister(QDIO_AIRQ_ISC);
- }
+ unregister_adapter_interrupt(&tiqdio_airq);
}