RDMA/irdma: Report correct WC error when transport retry counter is exceeded

When the retry counter exceeds, as the remote QP didn't send any Ack or
Nack an asynchronous event (AE) for too many retries is generated. Add
code to handle the AE and set the correct IB WC error code
IB_WC_RETRY_EXC_ERR.

Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Link: https://lore.kernel.org/r/20210916191222.824-4-shiraz.saleem@intel.com
Signed-off-by: Sindhu Devale <sindhu.devale@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index 33c06a3..cb9a8e2 100644 (file)
--- a/drivers/infiniband/hw/irdma/hw.c
+++ b/drivers/infiniband/hw/irdma/hw.c
@@ -176,6 +176,9 @@ static void irdma_set_flush_fields(struct irdma_sc_qp *qp,
        case IRDMA_AE_LLP_RECEIVED_MPA_CRC_ERROR:
                qp->flush_code = FLUSH_GENERAL_ERR;
                break;
+       case IRDMA_AE_LLP_TOO_MANY_RETRIES:
+               qp->flush_code = FLUSH_RETRY_EXC_ERR;
+               break;
        default:
                qp->flush_code = FLUSH_FATAL_ERR;
                break;

diff --git a/drivers/infiniband/hw/irdma/user.h b/drivers/infiniband/hw/irdma/user.h
index ff705f3..267102d 100644 (file)
--- a/drivers/infiniband/hw/irdma/user.h
+++ b/drivers/infiniband/hw/irdma/user.h
@@ -102,6 +102,7 @@ enum irdma_flush_opcode {
        FLUSH_REM_OP_ERR,
        FLUSH_LOC_LEN_ERR,
        FLUSH_FATAL_ERR,
+       FLUSH_RETRY_EXC_ERR,
 };
 
 enum irdma_cmpl_status {

diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 23c4748..c7e129e 100644 (file)
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -3352,6 +3352,8 @@ static enum ib_wc_status irdma_flush_err_to_ib_wc_status(enum irdma_flush_opcode
                return IB_WC_LOC_LEN_ERR;
        case FLUSH_GENERAL_ERR:
                return IB_WC_WR_FLUSH_ERR;
+       case FLUSH_RETRY_EXC_ERR:
+               return IB_WC_RETRY_EXC_ERR;
        case FLUSH_FATAL_ERR:
        default:
                return IB_WC_FATAL_ERR;