RDMA/ocrdma: Report EQ full fatal error

Detect when Event Queue (EQ) becomes full and print a warning message.

Signed-off-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Selvin Xavier <selvin.xavier@avagotech.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index 3a5ea5a..65759ac 100644 (file)
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -933,12 +933,18 @@ static irqreturn_t ocrdma_irq_handler(int irq, void *handle)
        struct ocrdma_eqe eqe;
        struct ocrdma_eqe *ptr;
        u16 cq_id;
+       u8 mcode;
        int budget = eq->cq_cnt;
 
        do {
                ptr = ocrdma_get_eqe(eq);
                eqe = *ptr;
                ocrdma_le32_to_cpu(&eqe, sizeof(eqe));
+               mcode = (eqe.id_valid & OCRDMA_EQE_MAJOR_CODE_MASK)
+                               >> OCRDMA_EQE_MAJOR_CODE_SHIFT;
+               if (mcode == OCRDMA_MAJOR_CODE_SENTINAL)
+                       pr_err("EQ full on eqid = 0x%x, eqe = 0x%x\n",
+                              eq->q.id, eqe.id_valid);
                if ((eqe.id_valid & OCRDMA_EQE_VALID_MASK) == 0)
                        break;
 

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
index 243c87c..baf9b8a 100644 (file)
--- a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
@@ -1624,12 +1624,19 @@ struct ocrdma_delete_ah_tbl_rsp {
 enum {
        OCRDMA_EQE_VALID_SHIFT          = 0,
        OCRDMA_EQE_VALID_MASK           = BIT(0),
+       OCRDMA_EQE_MAJOR_CODE_MASK      = 0x0E,
+       OCRDMA_EQE_MAJOR_CODE_SHIFT     = 0x01,
        OCRDMA_EQE_FOR_CQE_MASK         = 0xFFFE,
        OCRDMA_EQE_RESOURCE_ID_SHIFT    = 16,
        OCRDMA_EQE_RESOURCE_ID_MASK     = 0xFFFF <<
                                OCRDMA_EQE_RESOURCE_ID_SHIFT,
 };
 
+enum major_code {
+       OCRDMA_MAJOR_CODE_COMPLETION    = 0x00,
+       OCRDMA_MAJOR_CODE_SENTINAL      = 0x01
+};
+
 struct ocrdma_eqe {
        u32 id_valid;
 };