1 files changed, 370 insertions, 4 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c b/drivers/net/ethernet/netronome/nfp/abm/main.c
index 5a12bb20bced..1561c2724c26 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -38,6 +38,9 @@
 #include <linux/netdevice.h>
 #include <linux/rcupdate.h>
 #include <linux/slab.h>
+#include <net/pkt_cls.h>
+#include <net/pkt_sched.h>
+#include <net/red.h>
 
 #include "../nfpcore/nfp.h"
 #include "../nfpcore/nfp_cpp.h"
@@ -55,6 +58,290 @@ static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
 	       FIELD_PREP(NFP_ABM_PORTID_ID, id);
 }
 
+static int
+__nfp_abm_reset_root(struct net_device *netdev, struct nfp_abm_link *alink,
+		     u32 handle, unsigned int qs, u32 init_val)
+{
+	struct nfp_port *port = nfp_port_from_netdev(netdev);
+	int ret;
+
+	ret = nfp_abm_ctrl_set_all_q_lvls(alink, init_val);
+	memset(alink->qdiscs, 0, sizeof(*alink->qdiscs) * alink->num_qdiscs);
+
+	alink->parent = handle;
+	alink->num_qdiscs = qs;
+	port->tc_offload_cnt = qs;
+
+	return ret;
+}
+
+static void
+nfp_abm_reset_root(struct net_device *netdev, struct nfp_abm_link *alink,
+		   u32 handle, unsigned int qs)
+{
+	__nfp_abm_reset_root(netdev, alink, handle, qs, ~0);
+}
+
+static int
+nfp_abm_red_find(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
+{
+	unsigned int i = TC_H_MIN(opt->parent) - 1;
+
+	if (opt->parent == TC_H_ROOT)
+		i = 0;
+	else if (TC_H_MAJ(alink->parent) == TC_H_MAJ(opt->parent))
+		i = TC_H_MIN(opt->parent) - 1;
+	else
+		return -EOPNOTSUPP;
+
+	if (i >= alink->num_qdiscs || opt->handle != alink->qdiscs[i].handle)
+		return -EOPNOTSUPP;
+
+	return i;
+}
+
+static void
+nfp_abm_red_destroy(struct net_device *netdev, struct nfp_abm_link *alink,
+		    u32 handle)
+{
+	unsigned int i;
+
+	for (i = 0; i < alink->num_qdiscs; i++)
+		if (handle == alink->qdiscs[i].handle)
+			break;
+	if (i == alink->num_qdiscs)
+		return;
+
+	if (alink->parent == TC_H_ROOT) {
+		nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 0);
+	} else {
+		nfp_abm_ctrl_set_q_lvl(alink, i, ~0);
+		memset(&alink->qdiscs[i], 0, sizeof(*alink->qdiscs));
+	}
+}
+
+static int
+nfp_abm_red_replace(struct net_device *netdev, struct nfp_abm_link *alink,
+		    struct tc_red_qopt_offload *opt)
+{
+	bool existing;
+	int i, err;
+
+	i = nfp_abm_red_find(alink, opt);
+	existing = i >= 0;
+
+	if (opt->set.min != opt->set.max || !opt->set.is_ecn) {
+		nfp_warn(alink->abm->app->cpp,
+			 "RED offload failed - unsupported parameters\n");
+		err = -EINVAL;
+		goto err_destroy;
+	}
+
+	if (existing) {
+		if (alink->parent == TC_H_ROOT)
+			err = nfp_abm_ctrl_set_all_q_lvls(alink, opt->set.min);
+		else
+			err = nfp_abm_ctrl_set_q_lvl(alink, i, opt->set.min);
+		if (err)
+			goto err_destroy;
+		return 0;
+	}
+
+	if (opt->parent == TC_H_ROOT) {
+		i = 0;
+		err = __nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 1,
+					   opt->set.min);
+	} else if (TC_H_MAJ(alink->parent) == TC_H_MAJ(opt->parent)) {
+		i = TC_H_MIN(opt->parent) - 1;
+		err = nfp_abm_ctrl_set_q_lvl(alink, i, opt->set.min);
+	} else {
+		return -EINVAL;
+	}
+	/* Set the handle to try full clean up, in case IO failed */
+	alink->qdiscs[i].handle = opt->handle;
+	if (err)
+		goto err_destroy;
+
+	if (opt->parent == TC_H_ROOT)
+		err = nfp_abm_ctrl_read_stats(alink, &alink->qdiscs[i].stats);
+	else
+		err = nfp_abm_ctrl_read_q_stats(alink, i,
+						&alink->qdiscs[i].stats);
+	if (err)
+		goto err_destroy;
+
+	if (opt->parent == TC_H_ROOT)
+		err = nfp_abm_ctrl_read_xstats(alink,
+					       &alink->qdiscs[i].xstats);
+	else
+		err = nfp_abm_ctrl_read_q_xstats(alink, i,
+						 &alink->qdiscs[i].xstats);
+	if (err)
+		goto err_destroy;
+
+	alink->qdiscs[i].stats.backlog_pkts = 0;
+	alink->qdiscs[i].stats.backlog_bytes = 0;
+
+	return 0;
+err_destroy:
+	/* If the qdisc keeps on living, but we can't offload undo changes */
+	if (existing) {
+		opt->set.qstats->qlen -= alink->qdiscs[i].stats.backlog_pkts;
+		opt->set.qstats->backlog -=
+			alink->qdiscs[i].stats.backlog_bytes;
+	}
+	nfp_abm_red_destroy(netdev, alink, opt->handle);
+
+	return err;
+}
+
+static void
+nfp_abm_update_stats(struct nfp_alink_stats *new, struct nfp_alink_stats *old,
+		     struct tc_qopt_offload_stats *stats)
+{
+	_bstats_update(stats->bstats, new->tx_bytes - old->tx_bytes,
+		       new->tx_pkts - old->tx_pkts);
+	stats->qstats->qlen += new->backlog_pkts - old->backlog_pkts;
+	stats->qstats->backlog += new->backlog_bytes - old->backlog_bytes;
+	stats->qstats->overlimits += new->overlimits - old->overlimits;
+	stats->qstats->drops += new->drops - old->drops;
+}
+
+static int
+nfp_abm_red_stats(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
+{
+	struct nfp_alink_stats *prev_stats;
+	struct nfp_alink_stats stats;
+	int i, err;
+
+	i = nfp_abm_red_find(alink, opt);
+	if (i < 0)
+		return i;
+	prev_stats = &alink->qdiscs[i].stats;
+
+	if (alink->parent == TC_H_ROOT)
+		err = nfp_abm_ctrl_read_stats(alink, &stats);
+	else
+		err = nfp_abm_ctrl_read_q_stats(alink, i, &stats);
+	if (err)
+		return err;
+
+	nfp_abm_update_stats(&stats, prev_stats, &opt->stats);
+
+	*prev_stats = stats;
+
+	return 0;
+}
+
+static int
+nfp_abm_red_xstats(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
+{
+	struct nfp_alink_xstats *prev_xstats;
+	struct nfp_alink_xstats xstats;
+	int i, err;
+
+	i = nfp_abm_red_find(alink, opt);
+	if (i < 0)
+		return i;
+	prev_xstats = &alink->qdiscs[i].xstats;
+
+	if (alink->parent == TC_H_ROOT)
+		err = nfp_abm_ctrl_read_xstats(alink, &xstats);
+	else
+		err = nfp_abm_ctrl_read_q_xstats(alink, i, &xstats);
+	if (err)
+		return err;
+
+	opt->xstats->forced_mark += xstats.ecn_marked - prev_xstats->ecn_marked;
+	opt->xstats->pdrop += xstats.pdrop - prev_xstats->pdrop;
+
+	*prev_xstats = xstats;
+
+	return 0;
+}
+
+static int
+nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink,
+		     struct tc_red_qopt_offload *opt)
+{
+	switch (opt->command) {
+	case TC_RED_REPLACE:
+		return nfp_abm_red_replace(netdev, alink, opt);
+	case TC_RED_DESTROY:
+		nfp_abm_red_destroy(netdev, alink, opt->handle);
+		return 0;
+	case TC_RED_STATS:
+		return nfp_abm_red_stats(alink, opt);
+	case TC_RED_XSTATS:
+		return nfp_abm_red_xstats(alink, opt);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int
+nfp_abm_mq_stats(struct nfp_abm_link *alink, struct tc_mq_qopt_offload *opt)
+{
+	struct nfp_alink_stats stats;
+	unsigned int i;
+	int err;
+
+	for (i = 0; i < alink->num_qdiscs; i++) {
+		if (alink->qdiscs[i].handle == TC_H_UNSPEC)
+			continue;
+
+		err = nfp_abm_ctrl_read_q_stats(alink, i, &stats);
+		if (err)
+			return err;
+
+		nfp_abm_update_stats(&stats, &alink->qdiscs[i].stats,
+				     &opt->stats);
+	}
+
+	return 0;
+}
+
+static int
+nfp_abm_setup_tc_mq(struct net_device *netdev, struct nfp_abm_link *alink,
+		    struct tc_mq_qopt_offload *opt)
+{
+	switch (opt->command) {
+	case TC_MQ_CREATE:
+		nfp_abm_reset_root(netdev, alink, opt->handle,
+				   alink->total_queues);
+		return 0;
+	case TC_MQ_DESTROY:
+		if (opt->handle == alink->parent)
+			nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 0);
+		return 0;
+	case TC_MQ_STATS:
+		return nfp_abm_mq_stats(alink, opt);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int
+nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
+		 enum tc_setup_type type, void *type_data)
+{
+	struct nfp_repr *repr = netdev_priv(netdev);
+	struct nfp_port *port;
+
+	port = nfp_port_from_netdev(netdev);
+	if (!port || port->type != NFP_PORT_PF_PORT)
+		return -EOPNOTSUPP;
+
+	switch (type) {
+	case TC_SETUP_QDISC_MQ:
+		return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data);
+	case TC_SETUP_QDISC_RED:
+		return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static struct net_device *nfp_abm_repr_get(struct nfp_app *app, u32 port_id)
 {
 	enum nfp_repr_type rtype;
@@ -83,14 +370,18 @@ nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink,
 	struct nfp_reprs *reprs;
 	struct nfp_repr *repr;
 	struct nfp_port *port;
+	unsigned int txqs;
 	int err;
 
-	if (ptype == NFP_PORT_PHYS_PORT)
+	if (ptype == NFP_PORT_PHYS_PORT) {
 		rtype = NFP_REPR_TYPE_PHYS_PORT;
-	else
+		txqs = 1;
+	} else {
 		rtype = NFP_REPR_TYPE_PF;
+		txqs = alink->vnic->max_rx_rings;
+	}
 
-	netdev = nfp_repr_alloc(app);
+	netdev = nfp_repr_alloc_mqs(app, txqs, 1);
 	if (!netdev)
 		return -ENOMEM;
 	repr = netdev_priv(netdev);
@@ -182,6 +473,7 @@ static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app)
 static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm)
 {
 	nfp_abm_kill_reprs_all(abm);
+	nfp_abm_ctrl_qm_disable(abm);
 
 	abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 	return 0;
@@ -200,6 +492,10 @@ static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
 	struct nfp_net *nn;
 	int err;
 
+	err = nfp_abm_ctrl_qm_enable(abm);
+	if (err)
+		return err;
+
 	list_for_each_entry(nn, &pf->vnics, vnic_list) {
 		struct nfp_abm_link *alink = nn->app_priv;
 
@@ -217,6 +513,7 @@ static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
 
 err_kill_all_reprs:
 	nfp_abm_kill_reprs_all(abm);
+	nfp_abm_ctrl_qm_disable(abm);
 	return err;
 }
 
@@ -291,13 +588,21 @@ nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
 	alink->abm = abm;
 	alink->vnic = nn;
 	alink->id = id;
+	alink->parent = TC_H_ROOT;
+	alink->total_queues = alink->vnic->max_rx_rings;
+	alink->qdiscs = kvzalloc(sizeof(*alink->qdiscs) * alink->total_queues,
+				 GFP_KERNEL);
+	if (!alink->qdiscs) {
+		err = -ENOMEM;
+		goto err_free_alink;
+	}
 
 	/* This is a multi-host app, make sure MAC/PHY is up, but don't
 	 * make the MAC/PHY state follow the state of any of the ports.
 	 */
 	err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
 	if (err < 0)
-		goto err_free_alink;
+		goto err_free_qdiscs;
 
 	netif_keep_dst(nn->dp.netdev);
 
@@ -306,6 +611,8 @@ nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
 
 	return 0;
 
+err_free_qdiscs:
+	kvfree(alink->qdiscs);
 err_free_alink:
 	kfree(alink);
 	return err;
@@ -316,9 +623,57 @@ static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
 	struct nfp_abm_link *alink = nn->app_priv;
 
 	nfp_abm_kill_reprs(alink->abm, alink);
+	kvfree(alink->qdiscs);
 	kfree(alink);
 }
 
+static u64 *
+nfp_abm_port_get_stats(struct nfp_app *app, struct nfp_port *port, u64 *data)
+{
+	struct nfp_repr *repr = netdev_priv(port->netdev);
+	struct nfp_abm_link *alink;
+	unsigned int i;
+
+	if (port->type != NFP_PORT_PF_PORT)
+		return data;
+	alink = repr->app_priv;
+	for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
+		*data++ = nfp_abm_ctrl_stat_non_sto(alink, i);
+		*data++ = nfp_abm_ctrl_stat_sto(alink, i);
+	}
+	return data;
+}
+
+static int
+nfp_abm_port_get_stats_count(struct nfp_app *app, struct nfp_port *port)
+{
+	struct nfp_repr *repr = netdev_priv(port->netdev);
+	struct nfp_abm_link *alink;
+
+	if (port->type != NFP_PORT_PF_PORT)
+		return 0;
+	alink = repr->app_priv;
+	return alink->vnic->dp.num_r_vecs * 2;
+}
+
+static u8 *
+nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port,
+			       u8 *data)
+{
+	struct nfp_repr *repr = netdev_priv(port->netdev);
+	struct nfp_abm_link *alink;
+	unsigned int i;
+
+	if (port->type != NFP_PORT_PF_PORT)
+		return data;
+	alink = repr->app_priv;
+	for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
+		data = nfp_pr_et(data, "q%u_no_wait", i);
+		data = nfp_pr_et(data, "q%u_delayed", i);
+	}
+	return data;
+}
+
 static int nfp_abm_init(struct nfp_app *app)
 {
 	struct nfp_pf *pf = app->pf;
@@ -350,6 +705,11 @@ static int nfp_abm_init(struct nfp_app *app)
 	if (err)
 		goto err_free_abm;
 
+	/* We start in legacy mode, make sure advanced queuing is disabled */
+	err = nfp_abm_ctrl_qm_disable(abm);
+	if (err)
+		goto err_free_abm;
+
 	err = -ENOMEM;
 	reprs = nfp_reprs_alloc(pf->max_data_vnics);
 	if (!reprs)
@@ -392,6 +752,12 @@ const struct nfp_app_type app_abm = {
 	.vnic_alloc	= nfp_abm_vnic_alloc,
 	.vnic_free	= nfp_abm_vnic_free,
 
+	.port_get_stats		= nfp_abm_port_get_stats,
+	.port_get_stats_count	= nfp_abm_port_get_stats_count,
+	.port_get_stats_strings	= nfp_abm_port_get_stats_strings,
+
+	.setup_tc	= nfp_abm_setup_tc,
+
 	.eswitch_mode_get	= nfp_abm_eswitch_mode_get,
 	.eswitch_mode_set	= nfp_abm_eswitch_mode_set,