IB/ehca: Rework irq handler

Rework ehca interrupt handling to avoid/reduce missed irq events.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index cf95ee474b0f..f08ad6f9c132 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -42,8 +42,6 @@
 #ifndef __EHCA_CLASSES_H__
 #define __EHCA_CLASSES_H__
 
-#include "ehca_classes.h"
-#include "ipz_pt_fn.h"
 
 struct ehca_module;
 struct ehca_qp;
@@ -54,14 +52,22 @@ struct ehca_mw;
 struct ehca_pd;
 struct ehca_av;
 
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
+
 #ifdef CONFIG_PPC64
 #include "ehca_classes_pSeries.h"
 #endif
+#include "ipz_pt_fn.h"
+#include "ehca_qes.h"
+#include "ehca_irq.h"
 
-#include <rdma/ib_verbs.h>
-#include <rdma/ib_user_verbs.h>
+#define EHCA_EQE_CACHE_SIZE 20
 
-#include "ehca_irq.h"
+struct ehca_eqe_cache_entry {
+        struct ehca_eqe *eqe;
+        struct ehca_cq *cq;
+};
 
 struct ehca_eq {
         u32 length;
@@ -74,6 +80,8 @@ struct ehca_eq {
         spinlock_t spinlock;
         struct tasklet_struct interrupt_task;
         u32 ist;
+        spinlock_t irq_spinlock;
+        struct ehca_eqe_cache_entry eqe_cache[EHCA_EQE_CACHE_SIZE];
 };
 
 struct ehca_sport {