qed/qede: Multi CoS support.

This patch adds support for tc mqprio offload,
using this different traffic classes on the adapter
can be utilized based on configured priority to tc map.

For example -

tc qdisc add dev eth0 root mqprio num_tc 4 map 0 1 2 3

This will cause SKBs with priority 0,1,2,3 to transmit
over tc 0,1,2,3 hardware queues respectively.

Signed-off-by: Manish Chopra <manish.chopra@cavium.com>
Signed-off-by: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 38 insertions, 10 deletions

diff --git a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
index b37857f3f950..2bd84d6d9b15 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
@@ -222,7 +222,7 @@ static void qede_get_strings_stats_txq(struct qede_dev *edev,
 				QEDE_TXQ_XDP_TO_IDX(edev, txq),
 				qede_tqstats_arr[i].string);
 		else
-			sprintf(*buf, "%d: %s", txq->index,
+			sprintf(*buf, "%d_%d: %s", txq->index, txq->cos,
 				qede_tqstats_arr[i].string);
 		*buf += ETH_GSTRING_LEN;
 	}
@@ -262,8 +262,13 @@ static void qede_get_strings_stats(struct qede_dev *edev, u8 *buf)
 		if (fp->type & QEDE_FASTPATH_XDP)
 			qede_get_strings_stats_txq(edev, fp->xdp_tx, &buf);
 
-		if (fp->type & QEDE_FASTPATH_TX)
-			qede_get_strings_stats_txq(edev, fp->txq, &buf);
+		if (fp->type & QEDE_FASTPATH_TX) {
+			int cos;
+
+			for_each_cos_in_txq(edev, cos)
+				qede_get_strings_stats_txq(edev,
+							   &fp->txq[cos], &buf);
+		}
 	}
 
 	/* Account for non-queue statistics */
@@ -338,8 +343,12 @@ static void qede_get_ethtool_stats(struct net_device *dev,
 		if (fp->type & QEDE_FASTPATH_XDP)
 			qede_get_ethtool_stats_txq(fp->xdp_tx, &buf);
 
-		if (fp->type & QEDE_FASTPATH_TX)
-			qede_get_ethtool_stats_txq(fp->txq, &buf);
+		if (fp->type & QEDE_FASTPATH_TX) {
+			int cos;
+
+			for_each_cos_in_txq(edev, cos)
+				qede_get_ethtool_stats_txq(&fp->txq[cos], &buf);
+		}
 	}
 
 	for (i = 0; i < QEDE_NUM_STATS; i++) {
@@ -366,7 +375,8 @@ static int qede_get_sset_count(struct net_device *dev, int stringset)
 				num_stats--;
 
 		/* Account for the Regular Tx statistics */
-		num_stats += QEDE_TSS_COUNT(edev) * QEDE_NUM_TQSTATS;
+		num_stats += QEDE_TSS_COUNT(edev) * QEDE_NUM_TQSTATS *
+				edev->dev_info.num_tc;
 
 		/* Account for the Regular Rx statistics */
 		num_stats += QEDE_RSS_COUNT(edev) * QEDE_NUM_RQSTATS;
@@ -741,9 +751,17 @@ static int qede_get_coalesce(struct net_device *dev,
 		}
 
 		for_each_queue(i) {
+			struct qede_tx_queue *txq;
+
 			fp = &edev->fp_array[i];
+
+			/* All TX queues of given fastpath uses same
+			 * coalescing value, so no need to iterate over
+			 * all TCs, TC0 txq should suffice.
+			 */
 			if (fp->type & QEDE_FASTPATH_TX) {
-				tx_handle = fp->txq->handle;
+				txq = QEDE_FP_TC0_TXQ(fp);
+				tx_handle = txq->handle;
 				break;
 			}
 		}
@@ -801,9 +819,17 @@ static int qede_set_coalesce(struct net_device *dev,
 		}
 
 		if (edev->fp_array[i].type & QEDE_FASTPATH_TX) {
+			struct qede_tx_queue *txq;
+
+			/* All TX queues of given fastpath uses same
+			 * coalescing value, so no need to iterate over
+			 * all TCs, TC0 txq should suffice.
+			 */
+			txq = QEDE_FP_TC0_TXQ(fp);
+
 			rc = edev->ops->common->set_coalesce(edev->cdev,
 							     0, txc,
-							     fp->txq->handle);
+							     txq->handle);
 			if (rc) {
 				DP_INFO(edev,
 					"Set TX coalesce error, rc = %d\n", rc);
@@ -1385,8 +1411,10 @@ static int qede_selftest_transmit_traffic(struct qede_dev *edev,
 	u16 val;
 
 	for_each_queue(i) {
-		if (edev->fp_array[i].type & QEDE_FASTPATH_TX) {
-			txq = edev->fp_array[i].txq;
+		struct qede_fastpath *fp = &edev->fp_array[i];
+
+		if (fp->type & QEDE_FASTPATH_TX) {
+			txq = QEDE_FP_TC0_TXQ(fp);
 			break;
 		}
 	}