From 71d3c0b49a72fd092b7490b923d1721ceced8170 Mon Sep 17 00:00:00 2001 From: Hariprasad Shenai Date: Thu, 9 Jul 2015 14:55:46 +0530 Subject: [PATCH] cxgb4vf: Fix check to use new User Doorbell mechanism If we don't have access to the new User GTS (T5+), use the old doorbell mechanism; otherwise use the new BAR2 mechanism. Signed-off-by: Hariprasad Shenai Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4vf/sge.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c index ad53e5ad2acd..1d5e77a566e1 100644 --- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c @@ -1898,7 +1898,10 @@ static int napi_rx_handler(struct napi_struct *napi, int budget) rspq->unhandled_irqs++; val = CIDXINC_V(work_done) | SEINTARM_V(intr_params); - if (is_t4(rspq->adapter->params.chip)) { + /* If we don't have access to the new User GTS (T5+), use the old + * doorbell mechanism; otherwise use the new BAR2 mechanism. + */ + if (unlikely(!rspq->bar2_addr)) { t4_write_reg(rspq->adapter, T4VF_SGE_BASE_ADDR + SGE_VF_GTS, val | INGRESSQID_V((u32)rspq->cntxt_id)); @@ -1998,10 +2001,13 @@ static unsigned int process_intrq(struct adapter *adapter) } val = CIDXINC_V(work_done) | SEINTARM_V(intrq->intr_params); - if (is_t4(adapter->params.chip)) + /* If we don't have access to the new User GTS (T5+), use the old + * doorbell mechanism; otherwise use the new BAR2 mechanism. + */ + if (unlikely(!intrq->bar2_addr)) { t4_write_reg(adapter, T4VF_SGE_BASE_ADDR + SGE_VF_GTS, val | INGRESSQID_V(intrq->cntxt_id)); - else { + } else { writel(val | INGRESSQID_V(intrq->bar2_qid), intrq->bar2_addr + SGE_UDB_GTS); wmb(); -- 2.39.2