[PATCH net-next 0/7] dpaa2-eth: add support for Rx traffic classes

[PATCH net-next 0/7] dpaa2-eth: add support for Rx traffic classes

[Ioana Ciornei]

This patch set adds support for Rx traffic classes on DPAA2 Ethernet
devices.

The first two patches make the necessary changes so that multiple
traffic classes are configured and their statistics are displayed in the
debugfs. The third patch adds a static distribution to said traffic
classes based on the VLAN PCP field.

The last patches add support for the congestion group taildrop mechanism
that allows us to control the number of frames that can accumulate on a
group of Rx frame queues belonging to the same traffic class.

Ioana Radulescu (7):
  dpaa2-eth: Add support for Rx traffic classes
  dpaa2-eth: Trim debugfs FQ stats
  dpaa2-eth: Distribute ingress frames based on VLAN prio
  dpaa2-eth: Add helper functions
  dpaa2-eth: Minor cleanup in dpaa2_eth_set_rx_taildrop()
  dpaa2-eth: Add congestion group taildrop
  dpaa2-eth: Update FQ taildrop threshold and buffer pool count

 .../freescale/dpaa2/dpaa2-eth-debugfs.c       |  11 +-
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 224 +++++++++++++++---
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  |  44 +++-
 .../ethernet/freescale/dpaa2/dpaa2-ethtool.c  |  24 +-
 .../net/ethernet/freescale/dpaa2/dpni-cmd.h   |  34 +++
 drivers/net/ethernet/freescale/dpaa2/dpni.c   | 131 ++++++++++
 drivers/net/ethernet/freescale/dpaa2/dpni.h   |  36 +++
 7 files changed, 449 insertions(+), 55 deletions(-)

-- 
2.17.1

[PATCH net-next 1/7] dpaa2-eth: Add support for Rx traffic classes

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

The firmware reserves for each DPNI a number of RX frame queues
equal to the number of configured flows x number of configured
traffic classes.

Current driver configuration directs all incoming traffic to
FQs corresponding to TC0, leaving all other priority levels unused.

Start adding support for multiple ingress traffic classes, by
configuring the FQs associated with all priority levels, not just
TC0. All settings that are per-TC, such as those related to
hashing and flow steering, are also updated.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 .../freescale/dpaa2/dpaa2-eth-debugfs.c       |  7 +-
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 70 +++++++++++++------
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  |  4 +-
 .../ethernet/freescale/dpaa2/dpaa2-ethtool.c  | 19 +++--
 4 files changed, 68 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
index 0a31e4268dfb..c453a23045c1 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
@@ -81,8 +81,8 @@ static int dpaa2_dbg_fqs_show(struct seq_file *file, void *offset)
 	int i, err;
 
 	seq_printf(file, "FQ stats for %s:\n", priv->net_dev->name);
-	seq_printf(file, "%s%16s%16s%16s%16s\n",
-		   "VFQID", "CPU", "Type", "Frames", "Pending frames");
+	seq_printf(file, "%s%16s%16s%16s%16s%16s\n",
+		   "VFQID", "CPU", "TC", "Type", "Frames", "Pending frames");
 
 	for (i = 0; i <  priv->num_fqs; i++) {
 		fq = &priv->fq[i];
@@ -90,9 +90,10 @@ static int dpaa2_dbg_fqs_show(struct seq_file *file, void *offset)
 		if (err)
 			fcnt = 0;
 
-		seq_printf(file, "%5d%16d%16s%16llu%16u\n",
+		seq_printf(file, "%5d%16d%16d%16s%16llu%16u\n",
 			   fq->fqid,
 			   fq->target_cpu,
+			   fq->tc,
 			   fq_type_to_str(fq),
 			   fq->stats.frames,
 			   fcnt);
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 4388d1039822..a8baf13063ae 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1283,6 +1283,7 @@ static void disable_ch_napi(struct dpaa2_eth_priv *priv)
 static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv, bool enable)
 {
 	struct dpni_taildrop td = {0};
+	struct dpaa2_eth_fq *fq;
 	int i, err;
 
 	if (priv->rx_td_enabled == enable)
@@ -1292,11 +1293,12 @@ static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv, bool enable)
 	td.threshold = DPAA2_ETH_TAILDROP_THRESH;
 
 	for (i = 0; i < priv->num_fqs; i++) {
-		if (priv->fq[i].type != DPAA2_RX_FQ)
+		fq = &priv->fq[i];
+		if (fq->type != DPAA2_RX_FQ)
 			continue;
 		err = dpni_set_taildrop(priv->mc_io, 0, priv->mc_token,
-					DPNI_CP_QUEUE, DPNI_QUEUE_RX, 0,
-					priv->fq[i].flowid, &td);
+					DPNI_CP_QUEUE, DPNI_QUEUE_RX,
+					fq->tc, fq->flowid, &td);
 		if (err) {
 			netdev_err(priv->net_dev,
 				   "dpni_set_taildrop() failed\n");
@@ -2400,7 +2402,7 @@ static void set_fq_affinity(struct dpaa2_eth_priv *priv)
 
 static void setup_fqs(struct dpaa2_eth_priv *priv)
 {
-	int i;
+	int i, j;
 
 	/* We have one TxConf FQ per Tx flow.
 	 * The number of Tx and Rx queues is the same.
@@ -2412,10 +2414,13 @@ static void setup_fqs(struct dpaa2_eth_priv *priv)
 		priv->fq[priv->num_fqs++].flowid = (u16)i;
 	}
 
-	for (i = 0; i < dpaa2_eth_queue_count(priv); i++) {
-		priv->fq[priv->num_fqs].type = DPAA2_RX_FQ;
-		priv->fq[priv->num_fqs].consume = dpaa2_eth_rx;
-		priv->fq[priv->num_fqs++].flowid = (u16)i;
+	for (j = 0; j < dpaa2_eth_tc_count(priv); j++) {
+		for (i = 0; i < dpaa2_eth_queue_count(priv); i++) {
+			priv->fq[priv->num_fqs].type = DPAA2_RX_FQ;
+			priv->fq[priv->num_fqs].consume = dpaa2_eth_rx;
+			priv->fq[priv->num_fqs].tc = (u8)j;
+			priv->fq[priv->num_fqs++].flowid = (u16)i;
+		}
 	}
 
 	/* For each FQ, decide on which core to process incoming frames */
@@ -2782,7 +2787,7 @@ static int setup_rx_flow(struct dpaa2_eth_priv *priv,
 	int err;
 
 	err = dpni_get_queue(priv->mc_io, 0, priv->mc_token,
-			     DPNI_QUEUE_RX, 0, fq->flowid, &queue, &qid);
+			     DPNI_QUEUE_RX, fq->tc, fq->flowid, &queue, &qid);
 	if (err) {
 		dev_err(dev, "dpni_get_queue(RX) failed\n");
 		return err;
@@ -2795,7 +2800,7 @@ static int setup_rx_flow(struct dpaa2_eth_priv *priv,
 	queue.destination.priority = 1;
 	queue.user_context = (u64)(uintptr_t)fq;
 	err = dpni_set_queue(priv->mc_io, 0, priv->mc_token,
-			     DPNI_QUEUE_RX, 0, fq->flowid,
+			     DPNI_QUEUE_RX, fq->tc, fq->flowid,
 			     DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST,
 			     &queue);
 	if (err) {
@@ -2804,6 +2809,10 @@ static int setup_rx_flow(struct dpaa2_eth_priv *priv,
 	}
 
 	/* xdp_rxq setup */
+	/* only once for each channel */
+	if (fq->tc > 0)
+		return 0;
+
 	err = xdp_rxq_info_reg(&fq->channel->xdp_rxq, priv->net_dev,
 			       fq->flowid);
 	if (err) {
@@ -2941,7 +2950,7 @@ static int config_legacy_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 {
 	struct device *dev = priv->net_dev->dev.parent;
 	struct dpni_rx_tc_dist_cfg dist_cfg;
-	int err;
+	int i, err = 0;
 
 	memset(&dist_cfg, 0, sizeof(dist_cfg));
 
@@ -2949,9 +2958,14 @@ static int config_legacy_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
 	dist_cfg.dist_mode = DPNI_DIST_MODE_HASH;
 
-	err = dpni_set_rx_tc_dist(priv->mc_io, 0, priv->mc_token, 0, &dist_cfg);
-	if (err)
-		dev_err(dev, "dpni_set_rx_tc_dist failed\n");
+	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
+		err = dpni_set_rx_tc_dist(priv->mc_io, 0, priv->mc_token,
+					  i, &dist_cfg);
+		if (err) {
+			dev_err(dev, "dpni_set_rx_tc_dist failed\n");
+			break;
+		}
+	}
 
 	return err;
 }
@@ -2961,7 +2975,7 @@ static int config_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 {
 	struct device *dev = priv->net_dev->dev.parent;
 	struct dpni_rx_dist_cfg dist_cfg;
-	int err;
+	int i, err = 0;
 
 	memset(&dist_cfg, 0, sizeof(dist_cfg));
 
@@ -2969,9 +2983,15 @@ static int config_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
 	dist_cfg.enable = 1;
 
-	err = dpni_set_rx_hash_dist(priv->mc_io, 0, priv->mc_token, &dist_cfg);
-	if (err)
-		dev_err(dev, "dpni_set_rx_hash_dist failed\n");
+	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
+		dist_cfg.tc = i;
+		err = dpni_set_rx_hash_dist(priv->mc_io, 0, priv->mc_token,
+					    &dist_cfg);
+		if (err) {
+			dev_err(dev, "dpni_set_rx_hash_dist failed\n");
+			break;
+		}
+	}
 
 	return err;
 }
@@ -2981,7 +3001,7 @@ static int config_cls_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 {
 	struct device *dev = priv->net_dev->dev.parent;
 	struct dpni_rx_dist_cfg dist_cfg;
-	int err;
+	int i, err = 0;
 
 	memset(&dist_cfg, 0, sizeof(dist_cfg));
 
@@ -2989,9 +3009,15 @@ static int config_cls_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
 	dist_cfg.enable = 1;
 
-	err = dpni_set_rx_fs_dist(priv->mc_io, 0, priv->mc_token, &dist_cfg);
-	if (err)
-		dev_err(dev, "dpni_set_rx_fs_dist failed\n");
+	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
+		dist_cfg.tc = i;
+		err = dpni_set_rx_fs_dist(priv->mc_io, 0, priv->mc_token,
+					  &dist_cfg);
+		if (err) {
+			dev_err(dev, "dpni_set_rx_fs_dist failed\n");
+			break;
+		}
+	}
 
 	return err;
 }
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 0581fbf1f98c..580ad5fd7bd8 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -294,7 +294,9 @@ struct dpaa2_eth_ch_stats {
 
 /* Maximum number of queues associated with a DPNI */
 #define DPAA2_ETH_MAX_TCS		8
-#define DPAA2_ETH_MAX_RX_QUEUES		16
+#define DPAA2_ETH_MAX_RX_QUEUES_PER_TC	16
+#define DPAA2_ETH_MAX_RX_QUEUES		\
+	(DPAA2_ETH_MAX_RX_QUEUES_PER_TC * DPAA2_ETH_MAX_TCS)
 #define DPAA2_ETH_MAX_TX_QUEUES		16
 #define DPAA2_ETH_MAX_QUEUES		(DPAA2_ETH_MAX_RX_QUEUES + \
 					DPAA2_ETH_MAX_TX_QUEUES)
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index bd13ee48d623..1d0402011ac5 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -547,7 +547,7 @@ static int do_cls_rule(struct net_device *net_dev,
 	dma_addr_t key_iova;
 	u64 fields = 0;
 	void *key_buf;
-	int err;
+	int i, err;
 
 	if (fs->ring_cookie != RX_CLS_FLOW_DISC &&
 	    fs->ring_cookie >= dpaa2_eth_queue_count(priv))
@@ -607,11 +607,18 @@ static int do_cls_rule(struct net_device *net_dev,
 			fs_act.options |= DPNI_FS_OPT_DISCARD;
 		else
 			fs_act.flow_id = fs->ring_cookie;
-		err = dpni_add_fs_entry(priv->mc_io, 0, priv->mc_token, 0,
-					fs->location, &rule_cfg, &fs_act);
-	} else {
-		err = dpni_remove_fs_entry(priv->mc_io, 0, priv->mc_token, 0,
-					   &rule_cfg);
+	}
+	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
+		if (add)
+			err = dpni_add_fs_entry(priv->mc_io, 0, priv->mc_token,
+						i, fs->location, &rule_cfg,
+						&fs_act);
+		else
+			err = dpni_remove_fs_entry(priv->mc_io, 0,
+						   priv->mc_token, i,
+						   &rule_cfg);
+		if (err)
+			break;
 	}
 
 	dma_unmap_single(dev, key_iova, rule_cfg.key_size * 2, DMA_TO_DEVICE);
-- 
2.17.1

[PATCH net-next 2/7] dpaa2-eth: Trim debugfs FQ stats

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

With the addition of multiple traffic classes support, the number
of available frame queues grew significantly, overly inflating the
debugfs FQ statistics entry. Update it to only show the queues
which are actually in use (i.e. have a non-zero frame counter).

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
index c453a23045c1..2880ca02d7e7 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
@@ -90,6 +90,10 @@ static int dpaa2_dbg_fqs_show(struct seq_file *file, void *offset)
 		if (err)
 			fcnt = 0;
 
+		/* Skip FQs with no traffic */
+		if (!fq->stats.frames && !fcnt)
+			continue;
+
 		seq_printf(file, "%5d%16d%16d%16s%16llu%16u\n",
 			   fq->fqid,
 			   fq->target_cpu,
-- 
2.17.1

[PATCH net-next 3/7] dpaa2-eth: Distribute ingress frames based on VLAN prio

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

Configure static ingress classification based on VLAN PCP field.
If the DPNI doesn't have enough traffic classes to accommodate all
priority levels, the lowest ones end up on TC 0 (default on miss).

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 116 ++++++++++++++++
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  |   1 +
 .../net/ethernet/freescale/dpaa2/dpni-cmd.h   |  34 +++++
 drivers/net/ethernet/freescale/dpaa2/dpni.c   | 131 ++++++++++++++++++
 drivers/net/ethernet/freescale/dpaa2/dpni.h   |  36 +++++
 5 files changed, 318 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index a8baf13063ae..cb6e6f7b8330 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -2689,6 +2689,118 @@ static void update_tx_fqids(struct dpaa2_eth_priv *priv)
 	priv->enqueue = dpaa2_eth_enqueue_qd;
 }
 
+/* Configure ingress classification based on VLAN PCP */
+static int set_vlan_qos(struct dpaa2_eth_priv *priv)
+{
+	struct device *dev = priv->net_dev->dev.parent;
+	struct dpkg_profile_cfg kg_cfg = {0};
+	struct dpni_qos_tbl_cfg qos_cfg = {0};
+	struct dpni_rule_cfg key_params;
+	void *dma_mem, *key, *mask;
+	u8 key_size = 2;	/* VLAN TCI field */
+	int i, pcp, err;
+
+	/* VLAN-based classification only makes sense if we have multiple
+	 * traffic classes.
+	 * Also, we need to extract just the 3-bit PCP field from the VLAN
+	 * header and we can only do that by using a mask
+	 */
+	if (dpaa2_eth_tc_count(priv) == 1 || !dpaa2_eth_fs_mask_enabled(priv)) {
+		dev_dbg(dev, "VLAN-based QoS classification not supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	dma_mem = kzalloc(DPAA2_CLASSIFIER_DMA_SIZE, GFP_KERNEL);
+	if (!dma_mem)
+		return -ENOMEM;
+
+	kg_cfg.num_extracts = 1;
+	kg_cfg.extracts[0].type = DPKG_EXTRACT_FROM_HDR;
+	kg_cfg.extracts[0].extract.from_hdr.prot = NET_PROT_VLAN;
+	kg_cfg.extracts[0].extract.from_hdr.type = DPKG_FULL_FIELD;
+	kg_cfg.extracts[0].extract.from_hdr.field = NH_FLD_VLAN_TCI;
+
+	err =  dpni_prepare_key_cfg(&kg_cfg, dma_mem);
+	if (err) {
+		dev_err(dev, "dpni_prepare_key_cfg failed\n");
+		goto out_free_tbl;
+	}
+
+	/* set QoS table */
+	qos_cfg.default_tc = 0;
+	qos_cfg.discard_on_miss = 0;
+	qos_cfg.key_cfg_iova = dma_map_single(dev, dma_mem,
+					      DPAA2_CLASSIFIER_DMA_SIZE,
+					      DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, qos_cfg.key_cfg_iova)) {
+		dev_err(dev, "QoS table DMA mapping failed\n");
+		err = -ENOMEM;
+		goto out_free_tbl;
+	}
+
+	err = dpni_set_qos_table(priv->mc_io, 0, priv->mc_token, &qos_cfg);
+	if (err) {
+		dev_err(dev, "dpni_set_qos_table failed\n");
+		goto out_unmap_tbl;
+	}
+
+	/* Add QoS table entries */
+	key = kzalloc(key_size * 2, GFP_KERNEL);
+	if (!key) {
+		err = -ENOMEM;
+		goto out_unmap_tbl;
+	}
+	mask = key + key_size;
+	*(u16 *)mask = cpu_to_be16(VLAN_PRIO_MASK);
+
+	key_params.key_iova = dma_map_single(dev, key, key_size * 2,
+					     DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, key_params.key_iova)) {
+		dev_err(dev, "Qos table entry DMA mapping failed\n");
+		err = -ENOMEM;
+		goto out_free_key;
+	}
+
+	key_params.mask_iova = key_params.key_iova + key_size;
+	key_params.key_size = key_size;
+
+	/* We add rules for PCP-based distribution starting with highest
+	 * priority (VLAN PCP = 7). If this DPNI doesn't have enough traffic
+	 * classes to accommodate all priority levels, the lowest ones end up
+	 * on TC 0 which was configured as default
+	 */
+	for (i = dpaa2_eth_tc_count(priv) - 1, pcp = 7; i >= 0; i--, pcp--) {
+		*(u16 *)key = cpu_to_be16(pcp << VLAN_PRIO_SHIFT);
+		dma_sync_single_for_device(dev, key_params.key_iova,
+					   key_size * 2, DMA_TO_DEVICE);
+
+		err = dpni_add_qos_entry(priv->mc_io, 0, priv->mc_token,
+					 &key_params, i, i);
+		if (err) {
+			dev_err(dev, "dpni_add_qos_entry failed\n");
+			dpni_clear_qos_table(priv->mc_io, 0, priv->mc_token);
+			goto out_unmap_key;
+		}
+	}
+
+	priv->vlan_cls_enabled = true;
+
+	/* Table and key memory is not persistent, clean everything up after
+	 * configuration is finished
+	 */
+out_unmap_key:
+	dma_unmap_single(dev, key_params.key_iova, key_size * 2, DMA_TO_DEVICE);
+out_free_key:
+	kfree(key);
+out_unmap_tbl:
+	dma_unmap_single(dev, qos_cfg.key_cfg_iova, DPAA2_CLASSIFIER_DMA_SIZE,
+			 DMA_TO_DEVICE);
+out_free_tbl:
+	kfree(dma_mem);
+
+	return err;
+}
+
 /* Configure the DPNI object this interface is associated with */
 static int setup_dpni(struct fsl_mc_device *ls_dev)
 {
@@ -2751,6 +2863,10 @@ static int setup_dpni(struct fsl_mc_device *ls_dev)
 			goto close;
 	}
 
+	err = set_vlan_qos(priv);
+	if (err && err != -EOPNOTSUPP)
+		goto close;
+
 	priv->cls_rules = devm_kzalloc(dev, sizeof(struct dpaa2_eth_cls_rule) *
 				       dpaa2_eth_fs_count(priv), GFP_KERNEL);
 	if (!priv->cls_rules) {
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 580ad5fd7bd8..7856f69bcf36 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -427,6 +427,7 @@ struct dpaa2_eth_priv {
 	u64 rx_cls_fields;
 	struct dpaa2_eth_cls_rule *cls_rules;
 	u8 rx_cls_enabled;
+	u8 vlan_cls_enabled;
 	struct bpf_prog *xdp_prog;
 #ifdef CONFIG_DEBUG_FS
 	struct dpaa2_debugfs dbg;
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h
index d9b6918807af..0048e856f85e 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpni-cmd.h
@@ -59,6 +59,10 @@
 
 #define DPNI_CMDID_SET_RX_TC_DIST			DPNI_CMD(0x235)
 
+#define DPNI_CMDID_SET_QOS_TBL				DPNI_CMD(0x240)
+#define DPNI_CMDID_ADD_QOS_ENT				DPNI_CMD(0x241)
+#define DPNI_CMDID_REMOVE_QOS_ENT			DPNI_CMD(0x242)
+#define DPNI_CMDID_CLR_QOS_TBL				DPNI_CMD(0x243)
 #define DPNI_CMDID_ADD_FS_ENT				DPNI_CMD(0x244)
 #define DPNI_CMDID_REMOVE_FS_ENT			DPNI_CMD(0x245)
 #define DPNI_CMDID_CLR_FS_ENT				DPNI_CMD(0x246)
@@ -567,4 +571,34 @@ struct dpni_cmd_remove_fs_entry {
 	__le64 mask_iova;
 };
 
+#define DPNI_DISCARD_ON_MISS_SHIFT	0
+#define DPNI_DISCARD_ON_MISS_SIZE	1
+
+struct dpni_cmd_set_qos_table {
+	__le32 pad;
+	u8 default_tc;
+	/* only the LSB */
+	u8 discard_on_miss;
+	__le16 pad1[21];
+	__le64 key_cfg_iova;
+};
+
+struct dpni_cmd_add_qos_entry {
+	__le16 pad;
+	u8 tc_id;
+	u8 key_size;
+	__le16 index;
+	__le16 pad1;
+	__le64 key_iova;
+	__le64 mask_iova;
+};
+
+struct dpni_cmd_remove_qos_entry {
+	u8 pad[3];
+	u8 key_size;
+	__le32 pad1;
+	__le64 key_iova;
+	__le64 mask_iova;
+};
+
 #endif /* _FSL_DPNI_CMD_H */
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni.c b/drivers/net/ethernet/freescale/dpaa2/dpni.c
index dd54e6953aeb..78fa325407ca 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpni.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpni.c
@@ -1786,3 +1786,134 @@ int dpni_remove_fs_entry(struct fsl_mc_io *mc_io,
 	/* send command to mc*/
 	return mc_send_command(mc_io, &cmd);
 }
+
+/**
+ * dpni_set_qos_table() - Set QoS mapping table
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPNI object
+ * @cfg:	QoS table configuration
+ *
+ * This function and all QoS-related functions require that
+ *'max_tcs > 1' was set at DPNI creation.
+ *
+ * warning: Before calling this function, call dpkg_prepare_key_cfg() to
+ *			prepare the key_cfg_iova parameter
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpni_set_qos_table(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       const struct dpni_qos_tbl_cfg *cfg)
+{
+	struct dpni_cmd_set_qos_table *cmd_params;
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPNI_CMDID_SET_QOS_TBL,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dpni_cmd_set_qos_table *)cmd.params;
+	cmd_params->default_tc = cfg->default_tc;
+	cmd_params->key_cfg_iova = cpu_to_le64(cfg->key_cfg_iova);
+	dpni_set_field(cmd_params->discard_on_miss, DISCARD_ON_MISS,
+		       cfg->discard_on_miss);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dpni_add_qos_entry() - Add QoS mapping entry (to select a traffic class)
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPNI object
+ * @cfg:	QoS rule to add
+ * @tc_id:	Traffic class selection (0-7)
+ * @index:	Location in the QoS table where to insert the entry.
+ *		Only relevant if MASKING is enabled for QoS classification on
+ *		this DPNI, it is ignored for exact match.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpni_add_qos_entry(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       const struct dpni_rule_cfg *cfg,
+		       u8 tc_id,
+		       u16 index)
+{
+	struct dpni_cmd_add_qos_entry *cmd_params;
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPNI_CMDID_ADD_QOS_ENT,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dpni_cmd_add_qos_entry *)cmd.params;
+	cmd_params->tc_id = tc_id;
+	cmd_params->key_size = cfg->key_size;
+	cmd_params->index = cpu_to_le16(index);
+	cmd_params->key_iova = cpu_to_le64(cfg->key_iova);
+	cmd_params->mask_iova = cpu_to_le64(cfg->mask_iova);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dpni_remove_qos_entry() - Remove QoS mapping entry
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPNI object
+ * @cfg:	QoS rule to remove
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpni_remove_qos_entry(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 token,
+			  const struct dpni_rule_cfg *cfg)
+{
+	struct dpni_cmd_remove_qos_entry *cmd_params;
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPNI_CMDID_REMOVE_QOS_ENT,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dpni_cmd_remove_qos_entry *)cmd.params;
+	cmd_params->key_size = cfg->key_size;
+	cmd_params->key_iova = cpu_to_le64(cfg->key_iova);
+	cmd_params->mask_iova = cpu_to_le64(cfg->mask_iova);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dpni_clear_qos_table() - Clear all QoS mapping entries
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPNI object
+ *
+ * Following this function call, all frames are directed to
+ * the default traffic class (0)
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpni_clear_qos_table(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPNI_CMDID_CLR_QOS_TBL,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni.h b/drivers/net/ethernet/freescale/dpaa2/dpni.h
index ee0711d06b3a..8c7ac20bf1a7 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpni.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpni.h
@@ -715,6 +715,26 @@ int dpni_set_rx_hash_dist(struct fsl_mc_io *mc_io,
 			  u16 token,
 			  const struct dpni_rx_dist_cfg *cfg);
 
+/**
+ * struct dpni_qos_tbl_cfg - Structure representing QOS table configuration
+ * @key_cfg_iova: I/O virtual address of 256 bytes DMA-able memory filled with
+ *		key extractions to be used as the QoS criteria by calling
+ *		dpkg_prepare_key_cfg()
+ * @discard_on_miss: Set to '1' to discard frames in case of no match (miss);
+ *		'0' to use the 'default_tc' in such cases
+ * @default_tc: Used in case of no-match and 'discard_on_miss'= 0
+ */
+struct dpni_qos_tbl_cfg {
+	u64 key_cfg_iova;
+	int discard_on_miss;
+	u8 default_tc;
+};
+
+int dpni_set_qos_table(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       const struct dpni_qos_tbl_cfg *cfg);
+
 /**
  * enum dpni_dest - DPNI destination types
  * @DPNI_DEST_NONE: Unassigned destination; The queue is set in parked mode and
@@ -961,6 +981,22 @@ int dpni_remove_fs_entry(struct fsl_mc_io *mc_io,
 			 u8 tc_id,
 			 const struct dpni_rule_cfg *cfg);
 
+int dpni_add_qos_entry(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       const struct dpni_rule_cfg *cfg,
+		       u8 tc_id,
+		       u16 index);
+
+int dpni_remove_qos_entry(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 token,
+			  const struct dpni_rule_cfg *cfg);
+
+int dpni_clear_qos_table(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token);
+
 int dpni_get_api_version(struct fsl_mc_io *mc_io,
 			 u32 cmd_flags,
 			 u16 *major_ver,
-- 
2.17.1

[PATCH net-next 4/7] dpaa2-eth: Add helper functions

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

Add convenient helper functions that determines whether Rx/Tx pause
frames are enabled based on link state flags received from firmware.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c     |  3 +--
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h     | 11 +++++++++++
 drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c |  5 ++---
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index cb6e6f7b8330..36e3ec0b30ac 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1326,8 +1326,7 @@ static int link_state_update(struct dpaa2_eth_priv *priv)
 	 * Rx FQ taildrop configuration as well. We configure taildrop
 	 * only when pause frame generation is disabled.
 	 */
-	tx_pause = !!(state.options & DPNI_LINK_OPT_PAUSE) ^
-		   !!(state.options & DPNI_LINK_OPT_ASYM_PAUSE);
+	tx_pause = dpaa2_eth_tx_pause_enabled(state.options);
 	dpaa2_eth_set_rx_taildrop(priv, !tx_pause);
 
 	/* When we manage the MAC/PHY using phylink there is no need
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 7856f69bcf36..6384f6a23349 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -510,6 +510,17 @@ enum dpaa2_eth_rx_dist {
 	(dpaa2_eth_cmp_dpni_ver((priv), DPNI_PAUSE_VER_MAJOR,	\
 				DPNI_PAUSE_VER_MINOR) >= 0)
 
+static inline bool dpaa2_eth_tx_pause_enabled(u64 link_options)
+{
+	return !!(link_options & DPNI_LINK_OPT_PAUSE) ^
+	       !!(link_options & DPNI_LINK_OPT_ASYM_PAUSE);
+}
+
+static inline bool dpaa2_eth_rx_pause_enabled(u64 link_options)
+{
+	return !!(link_options & DPNI_LINK_OPT_PAUSE);
+}
+
 static inline
 unsigned int dpaa2_eth_needed_headroom(struct dpaa2_eth_priv *priv,
 				       struct sk_buff *skb)
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index 1d0402011ac5..326c638c7a56 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -130,9 +130,8 @@ static void dpaa2_eth_get_pauseparam(struct net_device *net_dev,
 		return;
 	}
 
-	pause->rx_pause = !!(link_options & DPNI_LINK_OPT_PAUSE);
-	pause->tx_pause = pause->rx_pause ^
-			  !!(link_options & DPNI_LINK_OPT_ASYM_PAUSE);
+	pause->rx_pause = dpaa2_eth_rx_pause_enabled(link_options);
+	pause->tx_pause = dpaa2_eth_tx_pause_enabled(link_options);
 	pause->autoneg = AUTONEG_DISABLE;
 }
 
-- 
2.17.1

[PATCH net-next 5/7] dpaa2-eth: Minor cleanup in dpaa2_eth_set_rx_taildrop()

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

Make clear the setting refers to FQ-based taildrop and the threshold
value is given in bytes (the default option).

Reverse the logic of the second argument (pass tx_pause transparently).
This will be helpful further on.

Also don't set the device's Rx taildrop flag unless configuration
succeeds.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 19 +++++++++++--------
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  |  4 ++--
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 36e3ec0b30ac..3cdfc564a45c 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1280,17 +1280,20 @@ static void disable_ch_napi(struct dpaa2_eth_priv *priv)
 	}
 }
 
-static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv, bool enable)
+static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv,
+				      bool tx_pause)
 {
 	struct dpni_taildrop td = {0};
 	struct dpaa2_eth_fq *fq;
 	int i, err;
 
-	if (priv->rx_td_enabled == enable)
+	td.enable = !tx_pause;
+	if (priv->rx_td_enabled == td.enable)
 		return;
 
-	td.enable = enable;
-	td.threshold = DPAA2_ETH_TAILDROP_THRESH;
+	/* FQ taildrop: threshold is in bytes, per frame queue */
+	td.threshold = DPAA2_ETH_FQ_TAILDROP_THRESH;
+	td.units = DPNI_CONGESTION_UNIT_BYTES;
 
 	for (i = 0; i < priv->num_fqs; i++) {
 		fq = &priv->fq[i];
@@ -1301,12 +1304,12 @@ static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv, bool enable)
 					fq->tc, fq->flowid, &td);
 		if (err) {
 			netdev_err(priv->net_dev,
-				   "dpni_set_taildrop() failed\n");
-			break;
+				   "dpni_set_taildrop(FQ) failed\n");
+			return;
 		}
 	}
 
-	priv->rx_td_enabled = enable;
+	priv->rx_td_enabled = td.enable;
 }
 
 static int link_state_update(struct dpaa2_eth_priv *priv)
@@ -1327,7 +1330,7 @@ static int link_state_update(struct dpaa2_eth_priv *priv)
 	 * only when pause frame generation is disabled.
 	 */
 	tx_pause = dpaa2_eth_tx_pause_enabled(state.options);
-	dpaa2_eth_set_rx_taildrop(priv, !tx_pause);
+	dpaa2_eth_set_rx_taildrop(priv, tx_pause);
 
 	/* When we manage the MAC/PHY using phylink there is no need
 	 * to manually update the netif_carrier.
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 6384f6a23349..1b9f6689e9ec 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -40,7 +40,7 @@
  * frames in the Rx queues (length of the current frame is not
  * taken into account when making the taildrop decision)
  */
-#define DPAA2_ETH_TAILDROP_THRESH	(64 * 1024)
+#define DPAA2_ETH_FQ_TAILDROP_THRESH	(64 * 1024)
 
 /* Maximum number of Tx confirmation frames to be processed
  * in a single NAPI call
@@ -52,7 +52,7 @@
  * how many 64B frames fit inside the taildrop threshold and add a margin
  * to accommodate the buffer refill delay.
  */
-#define DPAA2_ETH_MAX_FRAMES_PER_QUEUE	(DPAA2_ETH_TAILDROP_THRESH / 64)
+#define DPAA2_ETH_MAX_FRAMES_PER_QUEUE	(DPAA2_ETH_FQ_TAILDROP_THRESH / 64)
 #define DPAA2_ETH_NUM_BUFS		(DPAA2_ETH_MAX_FRAMES_PER_QUEUE + 256)
 #define DPAA2_ETH_REFILL_THRESH \
 	(DPAA2_ETH_NUM_BUFS - DPAA2_ETH_BUFS_PER_CMD)
-- 
2.17.1

[PATCH net-next 6/7] dpaa2-eth: Add congestion group taildrop

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

The increase in number of ingress frame queues means we now risk
depleting the buffer pool before the FQ taildrop kicks in.

Congestion group taildrop allows us to control the number of frames
that can accumulate on a group of Rx frame queues belonging to the
same traffic class.

This setting coexists with the frame queue based taildrop: whichever
limit gets hit first triggers the frame drop.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 16 ++++++++++++++++
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h |  9 +++++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 3cdfc564a45c..624f0e4bdc6c 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1309,6 +1309,22 @@ static void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv,
 		}
 	}
 
+	/* Congestion group taildrop: threshold is in frames, per group
+	 * of FQs belonging to the same traffic class
+	 */
+	td.threshold = DPAA2_ETH_CG_TAILDROP_THRESH(priv);
+	td.units = DPNI_CONGESTION_UNIT_FRAMES;
+	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
+		err = dpni_set_taildrop(priv->mc_io, 0, priv->mc_token,
+					DPNI_CP_GROUP, DPNI_QUEUE_RX,
+					i, 0, &td);
+		if (err) {
+			netdev_err(priv->net_dev,
+				   "dpni_set_taildrop(CG) failed\n");
+			return;
+		}
+	}
+
 	priv->rx_td_enabled = td.enable;
 }
 
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 1b9f6689e9ec..184d5d83e497 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -57,6 +57,15 @@
 #define DPAA2_ETH_REFILL_THRESH \
 	(DPAA2_ETH_NUM_BUFS - DPAA2_ETH_BUFS_PER_CMD)
 
+/* Congestion group taildrop threshold: number of frames allowed to accumulate
+ * at any moment in a group of Rx queues belonging to the same traffic class.
+ * Choose value such that we don't risk depleting the buffer pool before the
+ * taildrop kicks in
+ */
+#define DPAA2_ETH_CG_TAILDROP_THRESH(priv)				\
+	(DPAA2_ETH_MAX_FRAMES_PER_QUEUE * dpaa2_eth_queue_count(priv) /	\
+	 dpaa2_eth_tc_count(priv))
+
 /* Maximum number of buffers that can be acquired/released through a single
  * QBMan command
  */
-- 
2.17.1

[PATCH net-next 7/7] dpaa2-eth: Update FQ taildrop threshold and buffer pool count

[Ioana Ciornei]

From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

Now that we have congestion group taildrop configured at all
times, we can afford to increase the frame queue taildrop
threshold; this will ensure a better response when receiving
bursts of large-sized frames.

Also decouple the buffer pool count from the Rx FQ taildrop
threshold, as above change would increase it too much. Instead,
keep the old count as a hardcoded value.

With the new limits, we try to ensure that:
* we allow enough leeway for large frame bursts (by buffering
enough of them in queues to avoid heavy dropping in case of
bursty traffic, but when overall ingress bandwidth is manageable)
* allow pending frames to be evenly spread between ingress FQs,
regardless of frame size
* avoid dropping frames due to the buffer pool being empty; this
is not a bad behaviour per se, but system overall response is
more linear and predictable when frames are dropped at frame
queue/group level.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  | 23 +++++++++----------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 184d5d83e497..02c0eea69a23 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -36,24 +36,24 @@
 /* Convert L3 MTU to L2 MFL */
 #define DPAA2_ETH_L2_MAX_FRM(mtu)	((mtu) + VLAN_ETH_HLEN)
 
-/* Set the taildrop threshold (in bytes) to allow the enqueue of several jumbo
- * frames in the Rx queues (length of the current frame is not
- * taken into account when making the taildrop decision)
+/* Set the taildrop threshold (in bytes) to allow the enqueue of a large
+ * enough number of jumbo frames in the Rx queues (length of the current
+ * frame is not taken into account when making the taildrop decision)
  */
-#define DPAA2_ETH_FQ_TAILDROP_THRESH	(64 * 1024)
+#define DPAA2_ETH_FQ_TAILDROP_THRESH	(1024 * 1024)
 
 /* Maximum number of Tx confirmation frames to be processed
  * in a single NAPI call
  */
 #define DPAA2_ETH_TXCONF_PER_NAPI	256
 
-/* Buffer quota per queue. Must be large enough such that for minimum sized
- * frames taildrop kicks in before the bpool gets depleted, so we compute
- * how many 64B frames fit inside the taildrop threshold and add a margin
- * to accommodate the buffer refill delay.
+/* Buffer qouta per channel. We want to keep in check number of ingress frames
+ * in flight: for small sized frames, congestion group taildrop may kick in
+ * first; for large sizes, Rx FQ taildrop threshold will ensure only a
+ * reasonable number of frames will be pending at any given time.
+ * Ingress frame drop due to buffer pool depletion should be a corner case only
  */
-#define DPAA2_ETH_MAX_FRAMES_PER_QUEUE	(DPAA2_ETH_FQ_TAILDROP_THRESH / 64)
-#define DPAA2_ETH_NUM_BUFS		(DPAA2_ETH_MAX_FRAMES_PER_QUEUE + 256)
+#define DPAA2_ETH_NUM_BUFS		1280
 #define DPAA2_ETH_REFILL_THRESH \
 	(DPAA2_ETH_NUM_BUFS - DPAA2_ETH_BUFS_PER_CMD)
 
@@ -63,8 +63,7 @@
  * taildrop kicks in
  */
 #define DPAA2_ETH_CG_TAILDROP_THRESH(priv)				\
-	(DPAA2_ETH_MAX_FRAMES_PER_QUEUE * dpaa2_eth_queue_count(priv) /	\
-	 dpaa2_eth_tc_count(priv))
+	(1024 * dpaa2_eth_queue_count(priv) / dpaa2_eth_tc_count(priv))
 
 /* Maximum number of buffers that can be acquired/released through a single
  * QBMan command
-- 
2.17.1

Re: [PATCH net-next 3/7] dpaa2-eth: Distribute ingress frames based on VLAN prio

[David Miller]

From: Ioana Ciornei <ioana.ciornei@nxp.com>
Date: Fri, 15 May 2020 19:52:56 +0300

> +/* Configure ingress classification based on VLAN PCP */
> +static int set_vlan_qos(struct dpaa2_eth_priv *priv)
> +{
> +	struct device *dev = priv->net_dev->dev.parent;
> +	struct dpkg_profile_cfg kg_cfg = {0};
> +	struct dpni_qos_tbl_cfg qos_cfg = {0};
> +	struct dpni_rule_cfg key_params;
> +	void *dma_mem, *key, *mask;

Please declare mask as "u16 *"

> +	*(u16 *)mask = cpu_to_be16(VLAN_PRIO_MASK);

And remove this cast, no other code changes are necessary.  Not even
to the calculation of the pointer value.

Re: [PATCH net-next 0/7] dpaa2-eth: add support for Rx traffic classes

[Jakub Kicinski]

On Fri, 15 May 2020 19:52:53 +0300 Ioana Ciornei wrote:
> This patch set adds support for Rx traffic classes on DPAA2 Ethernet
> devices.
> 
> The first two patches make the necessary changes so that multiple
> traffic classes are configured and their statistics are displayed in the
> debugfs. The third patch adds a static distribution to said traffic
> classes based on the VLAN PCP field.
> 
> The last patches add support for the congestion group taildrop mechanism
> that allows us to control the number of frames that can accumulate on a
> group of Rx frame queues belonging to the same traffic class.

How is this configured from the user perspective? I looked through the
patches and I see no information on how the input is taken from the
user.