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Commit 71d3c0b4 authored by Hariprasad Shenai's avatar Hariprasad Shenai Committed by David S. Miller
Browse files

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: default avatarHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ba29becd

drivers/net/ethernet/chelsio/cxgb4vf/sge.c

+9 −3
Original line number Diff line number Diff line
@@ -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();