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authorJan Glauber <jang@linux.vnet.ibm.com>2012-11-29 16:05:05 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-11-30 20:47:21 +0400
commit9a4da8a5b109906a64bed5aaeb83bf4edb1f5888 (patch)
tree2788d7c8fe3e90333555435c7539d9f31d2c520e /include/linux/irq.h
parente56e4e87e370a0f121450d52337969aa1be21ff7 (diff)
downloadlinux-9a4da8a5b109906a64bed5aaeb83bf4edb1f5888.tar.xz
s390/pci: PCI adapter interrupts for MSI/MSI-X
Support PCI adapter interrupts using the Single-IRQ-mode. Single-IRQ-mode disables an adapter IRQ automatically after delivering it until the SIC instruction enables it again. This is used to reduce the number of IRQs for streaming workloads. Up to 64 MSI handlers can be registered per PCI function. A hash table is used to map interrupt numbers to MSI descriptors. The interrupt vector is scanned using the flogr instruction. Only MSI/MSI-X interrupts are supported, no legacy INTs. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r--include/linux/irq.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 216b0ba109d7..e21ed837c673 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -10,9 +10,6 @@
*/
#include <linux/smp.h>
-
-#ifndef CONFIG_S390
-
#include <linux/linkage.h>
#include <linux/cache.h>
#include <linux/spinlock.h>
@@ -737,8 +734,11 @@ static inline void irq_gc_lock(struct irq_chip_generic *gc) { }
static inline void irq_gc_unlock(struct irq_chip_generic *gc) { }
#endif
-#endif /* CONFIG_GENERIC_HARDIRQS */
+#else /* !CONFIG_GENERIC_HARDIRQS */
-#endif /* !CONFIG_S390 */
+extern struct msi_desc *irq_get_msi_desc(unsigned int irq);
+extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
+
+#endif /* CONFIG_GENERIC_HARDIRQS */
#endif /* _LINUX_IRQ_H */