1 files changed, 33 insertions, 5 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 196652a114c5..550cc065649f 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -1600,7 +1600,8 @@ static netdev_tx_t cxgb4_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 		 * has opened up.
 		 */
 		eth_txq_stop(q);
-		wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
+		if (chip_ver > CHELSIO_T5)
+			wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
 	}
 
 	wr = (void *)&q->q.desc[q->q.pidx];
@@ -1832,6 +1833,7 @@ static netdev_tx_t cxgb4_vf_eth_xmit(struct sk_buff *skb,
 	struct adapter *adapter;
 	int qidx, credits, ret;
 	size_t fw_hdr_copy_len;
+	unsigned int chip_ver;
 	u64 cntrl, *end;
 	u32 wr_mid;
 
@@ -1896,6 +1898,7 @@ static netdev_tx_t cxgb4_vf_eth_xmit(struct sk_buff *skb,
 		goto out_free;
 	}
 
+	chip_ver = CHELSIO_CHIP_VERSION(adapter->params.chip);
 	wr_mid = FW_WR_LEN16_V(DIV_ROUND_UP(flits, 2));
 	if (unlikely(credits < ETHTXQ_STOP_THRES)) {
 		/* After we're done injecting the Work Request for this
@@ -1907,7 +1910,8 @@ static netdev_tx_t cxgb4_vf_eth_xmit(struct sk_buff *skb,
 		 * has opened up.
 		 */
 		eth_txq_stop(txq);
-		wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
+		if (chip_ver > CHELSIO_T5)
+			wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
 	}
 
 	/* Start filling in our Work Request.  Note that we do _not_ handle
@@ -1960,7 +1964,7 @@ static netdev_tx_t cxgb4_vf_eth_xmit(struct sk_buff *skb,
 		 */
 		cpl = (void *)(lso + 1);
 
-		if (CHELSIO_CHIP_VERSION(adapter->params.chip) <= CHELSIO_T5)
+		if (chip_ver <= CHELSIO_T5)
 			cntrl = TXPKT_ETHHDR_LEN_V(eth_xtra_len);
 		else
 			cntrl = T6_TXPKT_ETHHDR_LEN_V(eth_xtra_len);
@@ -3598,6 +3602,25 @@ static void t4_tx_completion_handler(struct sge_rspq *rspq,
 	}
 
 	txq = &s->ethtxq[pi->first_qset + rspq->idx];
+
+	/* We've got the Hardware Consumer Index Update in the Egress Update
+	 * message. These Egress Update messages will be our sole CIDX Updates
+	 * we get since we don't want to chew up PCIe bandwidth for both Ingress
+	 * Messages and Status Page writes.  However, The code which manages
+	 * reclaiming successfully DMA'ed TX Work Requests uses the CIDX value
+	 * stored in the Status Page at the end of the TX Queue.  It's easiest
+	 * to simply copy the CIDX Update value from the Egress Update message
+	 * to the Status Page.  Also note that no Endian issues need to be
+	 * considered here since both are Big Endian and we're just copying
+	 * bytes consistently ...
+	 */
+	if (CHELSIO_CHIP_VERSION(adapter->params.chip) <= CHELSIO_T5) {
+		struct cpl_sge_egr_update *egr;
+
+		egr = (struct cpl_sge_egr_update *)rsp;
+		WRITE_ONCE(txq->q.stat->cidx, egr->cidx);
+	}
+
 	t4_sge_eth_txq_egress_update(adapter, txq, -1);
 }
 
@@ -4583,11 +4606,15 @@ int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
 	 * write the CIDX Updates into the Status Page at the end of the
 	 * TX Queue.
 	 */
-	c.autoequiqe_to_viid = htonl(FW_EQ_ETH_CMD_AUTOEQUEQE_F |
+	c.autoequiqe_to_viid = htonl(((chip_ver <= CHELSIO_T5) ?
+				      FW_EQ_ETH_CMD_AUTOEQUIQE_F :
+				      FW_EQ_ETH_CMD_AUTOEQUEQE_F) |
 				     FW_EQ_ETH_CMD_VIID_V(pi->viid));
 
 	c.fetchszm_to_iqid =
-		htonl(FW_EQ_ETH_CMD_HOSTFCMODE_V(HOSTFCMODE_STATUS_PAGE_X) |
+		htonl(FW_EQ_ETH_CMD_HOSTFCMODE_V((chip_ver <= CHELSIO_T5) ?
+						 HOSTFCMODE_INGRESS_QUEUE_X :
+						 HOSTFCMODE_STATUS_PAGE_X) |
 		      FW_EQ_ETH_CMD_PCIECHN_V(pi->tx_chan) |
 		      FW_EQ_ETH_CMD_FETCHRO_F | FW_EQ_ETH_CMD_IQID_V(iqid));
 
@@ -4598,6 +4625,7 @@ int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
 					    : FETCHBURSTMIN_64B_T6_X) |
 		      FW_EQ_ETH_CMD_FBMAX_V(FETCHBURSTMAX_512B_X) |
 		      FW_EQ_ETH_CMD_CIDXFTHRESH_V(CIDXFLUSHTHRESH_32_X) |
+		      FW_EQ_ETH_CMD_CIDXFTHRESHO_V(chip_ver == CHELSIO_T5) |
 		      FW_EQ_ETH_CMD_EQSIZE_V(nentries));
 
 	c.eqaddr = cpu_to_be64(txq->q.phys_addr);