RDMA/nes: Inform hardware that asynchronous event has been handled

When asynchronous events are processed by software, it is necessary
to let the hardware know that software has handled the event.  This
frees up the entry in the asynchronous event queue.

Signed-off-by: Don Wood <donald.e.wood@intel.com>
Signed-off-by: Chien Tung <chien.tin.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

2 files changed, 3 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index 3a72a06f1df8..1c5e946ce226 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -2269,6 +2269,8 @@ static void nes_process_aeq(struct nes_device *nesdev, struct nes_hw_aeq *aeq)
 
                 if (++head >= aeq_size)
                         head = 0;
+
+                nes_write32(nesdev->regs + NES_AEQ_ALLOC, 1 << 16);
         }
         while (1);
         aeq->aeq_head = head;
diff --git a/drivers/infiniband/hw/nes/nes_hw.h b/drivers/infiniband/hw/nes/nes_hw.h
index 6f8712d7a2cc..bf7ecfa5f976 100644
--- a/drivers/infiniband/hw/nes/nes_hw.h
+++ b/drivers/infiniband/hw/nes/nes_hw.h
@@ -61,6 +61,7 @@ enum pci_regs {
         NES_CQ_ACK = 0x0034,
         NES_WQE_ALLOC = 0x0040,
         NES_CQE_ALLOC = 0x0044,
+        NES_AEQ_ALLOC = 0x0048
 };
 
 enum indexed_regs {