[PATCH net-next v2 00/13] mlxsw: Add support for buffer drops mirroring

[PATCH net-next v2 00/13] mlxsw: Add support for buffer drops mirroring

[Petr Machata]

This set offloads the recently introduced qevent infrastructure in TC and
allows mlxsw to support mirroring of packets that were dropped due to
buffer related reasons (e.g., early drops) during forwarding.

Up until now mlxsw only supported mirroring that was either triggered by
per-port triggers (i.e., via matchall) or by the policy engine (i.e.,
via flower). Packets that are dropped due to buffer related reasons are
mirrored using a third type of trigger, a global trigger.

Global triggers are bound once to a mirroring (SPAN) agent and enabled
on a per-{port, TC} basis. This allows users, for example, to request
that only packets that were early dropped on a specific netdev to be
mirrored.

Patch set overview:

Patch #1 extends flow_block_offload and indirect offload structure to pass
a scheduler instead of a netdevice. That is necessary, because binding type
and netdevice are not a unique identifier of the block anymore.

Patches #2-#3 add the required registers to support above mentioned
functionality.

Patches #4-#6 gradually add support for global mirroring triggers.

Patch #7 adds support for enablement of global mirroring triggers.

Patches #8-#11 are cleanups in the flow offload code and shuffle some
code around to make the qevent offload easier.

Patch #12 implements offload of RED early_drop qevent.

Patch #13 extends the RED selftest for offloaded datapath to cover
early_drop qevent.

v2:
- Patch #1:
    - In struct flow_block_indr, track both sch and dev.

Amit Cohen (2):
  mlxsw: reg: Add Monitoring Mirror Trigger Enable Register
  mlxsw: reg: Add Monitoring Port Analyzer Global Register

Ido Schimmel (4):
  mlxsw: spectrum_span: Move SPAN operations out of global file
  mlxsw: spectrum_span: Prepare for global mirroring triggers
  mlxsw: spectrum_span: Add support for global mirroring triggers
  mlxsw: spectrum_span: Add APIs to enable / disable global mirroring
    triggers

Petr Machata (7):
  net: sched: Pass qdisc reference in struct flow_block_offload
  mlxsw: spectrum_flow: Convert a goto to a return
  mlxsw: spectrum_flow: Drop an unused field
  mlxsw: spectrum_matchall: Publish matchall data structures
  mlxsw: spectrum_flow: Promote binder-type dispatch to spectrum.c
  mlxsw: spectrum_qdisc: Offload mirroring on RED qevent early_drop
  selftests: mlxsw: RED: Test offload of mirror on RED early_drop qevent

 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c  |   9 +-
 .../ethernet/mellanox/mlx5/core/en/rep/tc.c   |  10 +-
 drivers/net/ethernet/mellanox/mlxsw/reg.h     | 102 ++++
 .../net/ethernet/mellanox/mlxsw/spectrum.c    |  65 +--
 .../net/ethernet/mellanox/mlxsw/spectrum.h    |  33 +-
 .../ethernet/mellanox/mlxsw/spectrum_flow.c   |  18 +-
 .../mellanox/mlxsw/spectrum_matchall.c        |  23 -
 .../ethernet/mellanox/mlxsw/spectrum_qdisc.c  | 472 ++++++++++++++++++
 .../ethernet/mellanox/mlxsw/spectrum_span.c   | 397 ++++++++++++++-
 .../ethernet/mellanox/mlxsw/spectrum_span.h   |  16 +
 .../net/ethernet/netronome/nfp/flower/main.h  |   2 +-
 .../ethernet/netronome/nfp/flower/offload.c   |   8 +-
 include/net/flow_offload.h                    |   9 +-
 net/core/flow_offload.c                       |  12 +-
 net/netfilter/nf_flow_table_offload.c         |   2 +-
 net/netfilter/nf_tables_offload.c             |   2 +-
 net/sched/cls_api.c                           |  16 +-
 .../drivers/net/mlxsw/sch_red_core.sh         | 106 +++-
 .../drivers/net/mlxsw/sch_red_ets.sh          |  11 +
 .../drivers/net/mlxsw/sch_red_root.sh         |   8 +
 20 files changed, 1179 insertions(+), 142 deletions(-)

-- 
2.20.1

[PATCH net-next v2 01/13] net: sched: Pass qdisc reference in struct flow_block_offload

[Petr Machata]

Previously, shared blocks were only relevant for the pseudo-qdiscs ingress
and clsact. Recently, a qevent facility was introduced, which allows to
bind blocks to well-defined slots of a qdisc instance. RED in particular
got two qevents: early_drop and mark. Drivers that wish to offload these
blocks will be sent the usual notification, and need to know which qdisc it
is related to.

To that end, extend flow_block_offload with a "sch" pointer, and initialize
as appropriate. This prompts changes in the indirect block facility, which
now tracks the scheduler in addition to the netdevice. Update signatures of
several functions similarly.

Signed-off-by: Petr Machata <petrm@mellanox.com>
---

Notes:
    v2:
    - In struct flow_block_indr, track both sch and dev.

 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c     |  9 ++++-----
 .../net/ethernet/mellanox/mlx5/core/en/rep/tc.c  | 10 +++++-----
 drivers/net/ethernet/netronome/nfp/flower/main.h |  2 +-
 .../net/ethernet/netronome/nfp/flower/offload.c  |  8 ++++----
 include/net/flow_offload.h                       |  9 ++++++---
 net/core/flow_offload.c                          | 12 +++++++-----
 net/netfilter/nf_flow_table_offload.c            |  2 +-
 net/netfilter/nf_tables_offload.c                |  2 +-
 net/sched/cls_api.c                              | 16 +++++++++-------
 9 files changed, 38 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
index 0a9a4467d7c7..e82e5cf64d61 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
@@ -1888,7 +1888,7 @@ static void bnxt_tc_setup_indr_rel(void *cb_priv)
 	kfree(priv);
 }
 
-static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
+static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct Qdisc *sch, struct bnxt *bp,
 				    struct flow_block_offload *f, void *data,
 				    void (*cleanup)(struct flow_block_cb *block_cb))
 {
@@ -1911,7 +1911,7 @@ static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
 		block_cb = flow_indr_block_cb_alloc(bnxt_tc_setup_indr_block_cb,
 						    cb_priv, cb_priv,
 						    bnxt_tc_setup_indr_rel, f,
-						    netdev, data, bp, cleanup);
+						    netdev, sch, data, bp, cleanup);
 		if (IS_ERR(block_cb)) {
 			list_del(&cb_priv->list);
 			kfree(cb_priv);
@@ -1946,7 +1946,7 @@ static bool bnxt_is_netdev_indr_offload(struct net_device *netdev)
 	return netif_is_vxlan(netdev);
 }
 
-static int bnxt_tc_setup_indr_cb(struct net_device *netdev, void *cb_priv,
+static int bnxt_tc_setup_indr_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
 				 enum tc_setup_type type, void *type_data,
 				 void *data,
 				 void (*cleanup)(struct flow_block_cb *block_cb))
@@ -1956,8 +1956,7 @@ static int bnxt_tc_setup_indr_cb(struct net_device *netdev, void *cb_priv,
 
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return bnxt_tc_setup_indr_block(netdev, cb_priv, type_data, data,
-						cleanup);
+		return bnxt_tc_setup_indr_block(netdev, sch, cb_priv, type_data, data, cleanup);
 	default:
 		break;
 	}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
index eefeb1cdc2ee..067e120510fe 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
@@ -404,7 +404,7 @@ static void mlx5e_rep_indr_block_unbind(void *cb_priv)
 static LIST_HEAD(mlx5e_block_cb_list);
 
 static int
-mlx5e_rep_indr_setup_block(struct net_device *netdev,
+mlx5e_rep_indr_setup_block(struct net_device *netdev, struct Qdisc *sch,
 			   struct mlx5e_rep_priv *rpriv,
 			   struct flow_block_offload *f,
 			   flow_setup_cb_t *setup_cb,
@@ -442,7 +442,7 @@ mlx5e_rep_indr_setup_block(struct net_device *netdev,
 
 		block_cb = flow_indr_block_cb_alloc(setup_cb, indr_priv, indr_priv,
 						    mlx5e_rep_indr_block_unbind,
-						    f, netdev, data, rpriv,
+						    f, netdev, sch, data, rpriv,
 						    cleanup);
 		if (IS_ERR(block_cb)) {
 			list_del(&indr_priv->list);
@@ -472,18 +472,18 @@ mlx5e_rep_indr_setup_block(struct net_device *netdev,
 }
 
 static
-int mlx5e_rep_indr_setup_cb(struct net_device *netdev, void *cb_priv,
+int mlx5e_rep_indr_setup_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
 			    enum tc_setup_type type, void *type_data,
 			    void *data,
 			    void (*cleanup)(struct flow_block_cb *block_cb))
 {
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return mlx5e_rep_indr_setup_block(netdev, cb_priv, type_data,
+		return mlx5e_rep_indr_setup_block(netdev, sch, cb_priv, type_data,
 						  mlx5e_rep_indr_setup_tc_cb,
 						  data, cleanup);
 	case TC_SETUP_FT:
-		return mlx5e_rep_indr_setup_block(netdev, cb_priv, type_data,
+		return mlx5e_rep_indr_setup_block(netdev, sch, cb_priv, type_data,
 						  mlx5e_rep_indr_setup_ft_cb,
 						  data, cleanup);
 	default:
diff --git a/drivers/net/ethernet/netronome/nfp/flower/main.h b/drivers/net/ethernet/netronome/nfp/flower/main.h
index 7f54a620acad..3bf9c1afa45e 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/main.h
+++ b/drivers/net/ethernet/netronome/nfp/flower/main.h
@@ -458,7 +458,7 @@ void nfp_flower_qos_cleanup(struct nfp_app *app);
 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
 				 struct tc_cls_matchall_offload *flow);
 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb);
-int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, void *cb_priv,
+int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
 				enum tc_setup_type type, void *type_data,
 				void *data,
 				void (*cleanup)(struct flow_block_cb *block_cb));
diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 3af27bb5f4b0..4651fe417b7f 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -1646,7 +1646,7 @@ void nfp_flower_setup_indr_tc_release(void *cb_priv)
 }
 
 static int
-nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct nfp_app *app,
+nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct Qdisc *sch, struct nfp_app *app,
 			       struct flow_block_offload *f, void *data,
 			       void (*cleanup)(struct flow_block_cb *block_cb))
 {
@@ -1680,7 +1680,7 @@ nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct nfp_app *app,
 		block_cb = flow_indr_block_cb_alloc(nfp_flower_setup_indr_block_cb,
 						    cb_priv, cb_priv,
 						    nfp_flower_setup_indr_tc_release,
-						    f, netdev, data, app, cleanup);
+						    f, netdev, sch, data, app, cleanup);
 		if (IS_ERR(block_cb)) {
 			list_del(&cb_priv->list);
 			kfree(cb_priv);
@@ -1711,7 +1711,7 @@ nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct nfp_app *app,
 }
 
 int
-nfp_flower_indr_setup_tc_cb(struct net_device *netdev, void *cb_priv,
+nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
 			    enum tc_setup_type type, void *type_data,
 			    void *data,
 			    void (*cleanup)(struct flow_block_cb *block_cb))
@@ -1721,7 +1721,7 @@ nfp_flower_indr_setup_tc_cb(struct net_device *netdev, void *cb_priv,
 
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return nfp_flower_setup_indr_tc_block(netdev, cb_priv,
+		return nfp_flower_setup_indr_tc_block(netdev, sch, cb_priv,
 						      type_data, data, cleanup);
 	default:
 		return -EOPNOTSUPP;
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index de395498440d..9f88a7b730a8 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -444,6 +444,7 @@ struct flow_block_offload {
 	struct list_head cb_list;
 	struct list_head *driver_block_list;
 	struct netlink_ext_ack *extack;
+	struct Qdisc *sch;
 };
 
 enum tc_setup_type;
@@ -455,6 +456,7 @@ struct flow_block_cb;
 struct flow_block_indr {
 	struct list_head		list;
 	struct net_device		*dev;
+	struct Qdisc			*sch;
 	enum flow_block_binder_type	binder_type;
 	void				*data;
 	void				*cb_priv;
@@ -479,7 +481,8 @@ struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 					       void *cb_ident, void *cb_priv,
 					       void (*release)(void *cb_priv),
 					       struct flow_block_offload *bo,
-					       struct net_device *dev, void *data,
+					       struct net_device *dev,
+					       struct Qdisc *sch, void *data,
 					       void *indr_cb_priv,
 					       void (*cleanup)(struct flow_block_cb *block_cb));
 void flow_block_cb_free(struct flow_block_cb *block_cb);
@@ -553,7 +556,7 @@ static inline void flow_block_init(struct flow_block *flow_block)
 	INIT_LIST_HEAD(&flow_block->cb_list);
 }
 
-typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
+typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
 				      enum tc_setup_type type, void *type_data,
 				      void *data,
 				      void (*cleanup)(struct flow_block_cb *block_cb));
@@ -561,7 +564,7 @@ typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
 			      void (*release)(void *cb_priv));
-int flow_indr_dev_setup_offload(struct net_device *dev,
+int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
 				enum tc_setup_type type, void *data,
 				struct flow_block_offload *bo,
 				void (*cleanup)(struct flow_block_cb *block_cb));
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index b739cfab796e..b8cf6ff5f961 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -429,7 +429,7 @@ EXPORT_SYMBOL(flow_indr_dev_unregister);
 
 static void flow_block_indr_init(struct flow_block_cb *flow_block,
 				 struct flow_block_offload *bo,
-				 struct net_device *dev, void *data,
+				 struct net_device *dev, struct Qdisc *sch, void *data,
 				 void *cb_priv,
 				 void (*cleanup)(struct flow_block_cb *block_cb))
 {
@@ -437,6 +437,7 @@ static void flow_block_indr_init(struct flow_block_cb *flow_block,
 	flow_block->indr.data = data;
 	flow_block->indr.cb_priv = cb_priv;
 	flow_block->indr.dev = dev;
+	flow_block->indr.sch = sch;
 	flow_block->indr.cleanup = cleanup;
 }
 
@@ -444,7 +445,8 @@ struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 					       void *cb_ident, void *cb_priv,
 					       void (*release)(void *cb_priv),
 					       struct flow_block_offload *bo,
-					       struct net_device *dev, void *data,
+					       struct net_device *dev,
+					       struct Qdisc *sch, void *data,
 					       void *indr_cb_priv,
 					       void (*cleanup)(struct flow_block_cb *block_cb))
 {
@@ -454,7 +456,7 @@ struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 	if (IS_ERR(block_cb))
 		goto out;
 
-	flow_block_indr_init(block_cb, bo, dev, data, indr_cb_priv, cleanup);
+	flow_block_indr_init(block_cb, bo, dev, sch, data, indr_cb_priv, cleanup);
 	list_add(&block_cb->indr.list, &flow_block_indr_list);
 
 out:
@@ -462,7 +464,7 @@ struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 }
 EXPORT_SYMBOL(flow_indr_block_cb_alloc);
 
-int flow_indr_dev_setup_offload(struct net_device *dev,
+int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
 				enum tc_setup_type type, void *data,
 				struct flow_block_offload *bo,
 				void (*cleanup)(struct flow_block_cb *block_cb))
@@ -471,7 +473,7 @@ int flow_indr_dev_setup_offload(struct net_device *dev,
 
 	mutex_lock(&flow_indr_block_lock);
 	list_for_each_entry(this, &flow_block_indr_dev_list, list)
-		this->cb(dev, this->cb_priv, type, bo, data, cleanup);
+		this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
 
 	mutex_unlock(&flow_indr_block_lock);
 
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index 5fff1e040168..2a6993fa40d7 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -964,7 +964,7 @@ static int nf_flow_table_indr_offload_cmd(struct flow_block_offload *bo,
 	nf_flow_table_block_offload_init(bo, dev_net(dev), cmd, flowtable,
 					 extack);
 
-	return flow_indr_dev_setup_offload(dev, TC_SETUP_FT, flowtable, bo,
+	return flow_indr_dev_setup_offload(dev, NULL, TC_SETUP_FT, flowtable, bo,
 					   nf_flow_table_indr_cleanup);
 }
 
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index c7cf1cde46de..9ef37c1b7b3b 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -312,7 +312,7 @@ static int nft_indr_block_offload_cmd(struct nft_base_chain *basechain,
 
 	nft_flow_block_offload_init(&bo, dev_net(dev), cmd, basechain, &extack);
 
-	err = flow_indr_dev_setup_offload(dev, TC_SETUP_BLOCK, basechain, &bo,
+	err = flow_indr_dev_setup_offload(dev, NULL, TC_SETUP_BLOCK, basechain, &bo,
 					  nft_indr_block_cleanup);
 	if (err < 0)
 		return err;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index e9e119ea6813..790882097431 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -622,7 +622,7 @@ static int tcf_block_setup(struct tcf_block *block,
 			   struct flow_block_offload *bo);
 
 static void tcf_block_offload_init(struct flow_block_offload *bo,
-				   struct net_device *dev,
+				   struct net_device *dev, struct Qdisc *sch,
 				   enum flow_block_command command,
 				   enum flow_block_binder_type binder_type,
 				   struct flow_block *flow_block,
@@ -634,6 +634,7 @@ static void tcf_block_offload_init(struct flow_block_offload *bo,
 	bo->block = flow_block;
 	bo->block_shared = shared;
 	bo->extack = extack;
+	bo->sch = sch;
 	INIT_LIST_HEAD(&bo->cb_list);
 }
 
@@ -644,10 +645,11 @@ static void tc_block_indr_cleanup(struct flow_block_cb *block_cb)
 {
 	struct tcf_block *block = block_cb->indr.data;
 	struct net_device *dev = block_cb->indr.dev;
+	struct Qdisc *sch = block_cb->indr.sch;
 	struct netlink_ext_ack extack = {};
 	struct flow_block_offload bo;
 
-	tcf_block_offload_init(&bo, dev, FLOW_BLOCK_UNBIND,
+	tcf_block_offload_init(&bo, dev, sch, FLOW_BLOCK_UNBIND,
 			       block_cb->indr.binder_type,
 			       &block->flow_block, tcf_block_shared(block),
 			       &extack);
@@ -666,14 +668,14 @@ static bool tcf_block_offload_in_use(struct tcf_block *block)
 }
 
 static int tcf_block_offload_cmd(struct tcf_block *block,
-				 struct net_device *dev,
+				 struct net_device *dev, struct Qdisc *sch,
 				 struct tcf_block_ext_info *ei,
 				 enum flow_block_command command,
 				 struct netlink_ext_ack *extack)
 {
 	struct flow_block_offload bo = {};
 
-	tcf_block_offload_init(&bo, dev, command, ei->binder_type,
+	tcf_block_offload_init(&bo, dev, sch, command, ei->binder_type,
 			       &block->flow_block, tcf_block_shared(block),
 			       extack);
 
@@ -690,7 +692,7 @@ static int tcf_block_offload_cmd(struct tcf_block *block,
 		return tcf_block_setup(block, &bo);
 	}
 
-	flow_indr_dev_setup_offload(dev, TC_SETUP_BLOCK, block, &bo,
+	flow_indr_dev_setup_offload(dev, sch, TC_SETUP_BLOCK, block, &bo,
 				    tc_block_indr_cleanup);
 	tcf_block_setup(block, &bo);
 
@@ -717,7 +719,7 @@ static int tcf_block_offload_bind(struct tcf_block *block, struct Qdisc *q,
 		goto err_unlock;
 	}
 
-	err = tcf_block_offload_cmd(block, dev, ei, FLOW_BLOCK_BIND, extack);
+	err = tcf_block_offload_cmd(block, dev, q, ei, FLOW_BLOCK_BIND, extack);
 	if (err == -EOPNOTSUPP)
 		goto no_offload_dev_inc;
 	if (err)
@@ -744,7 +746,7 @@ static void tcf_block_offload_unbind(struct tcf_block *block, struct Qdisc *q,
 	int err;
 
 	down_write(&block->cb_lock);
-	err = tcf_block_offload_cmd(block, dev, ei, FLOW_BLOCK_UNBIND, NULL);
+	err = tcf_block_offload_cmd(block, dev, q, ei, FLOW_BLOCK_UNBIND, NULL);
 	if (err == -EOPNOTSUPP)
 		goto no_offload_dev_dec;
 	up_write(&block->cb_lock);
-- 
2.20.1

[PATCH net-next v2 02/13] mlxsw: reg: Add Monitoring Mirror Trigger Enable Register

[Petr Machata]

From: Amit Cohen <amitc@mellanox.com>

This register is used to configure the mirror enable for different
mirror reasons.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 50 +++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index b76c839223b5..aa2fd7debec2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -9502,6 +9502,55 @@ MLXSW_ITEM32(reg, mogcr, ptp_iftc, 0x00, 1, 1);
  */
 MLXSW_ITEM32(reg, mogcr, ptp_eftc, 0x00, 0, 1);
 
+/* MOMTE - Monitoring Mirror Trigger Enable Register
+ * -------------------------------------------------
+ * This register is used to configure the mirror enable for different mirror
+ * reasons.
+ */
+#define MLXSW_REG_MOMTE_ID 0x908D
+#define MLXSW_REG_MOMTE_LEN 0x10
+
+MLXSW_REG_DEFINE(momte, MLXSW_REG_MOMTE_ID, MLXSW_REG_MOMTE_LEN);
+
+/* reg_momte_local_port
+ * Local port number.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, momte, local_port, 0x00, 16, 8);
+
+enum mlxsw_reg_momte_type {
+	MLXSW_REG_MOMTE_TYPE_WRED = 0x20,
+	MLXSW_REG_MOMTE_TYPE_SHARED_BUFFER_TCLASS = 0x31,
+	MLXSW_REG_MOMTE_TYPE_SHARED_BUFFER_TCLASS_DESCRIPTORS = 0x32,
+	MLXSW_REG_MOMTE_TYPE_SHARED_BUFFER_EGRESS_PORT = 0x33,
+	MLXSW_REG_MOMTE_TYPE_ING_CONG = 0x40,
+	MLXSW_REG_MOMTE_TYPE_EGR_CONG = 0x50,
+	MLXSW_REG_MOMTE_TYPE_ECN = 0x60,
+	MLXSW_REG_MOMTE_TYPE_HIGH_LATENCY = 0x70,
+};
+
+/* reg_momte_type
+ * Type of mirroring.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, momte, type, 0x04, 0, 8);
+
+/* reg_momte_tclass_en
+ * TClass/PG mirror enable. Each bit represents corresponding tclass.
+ * 0: disable (default)
+ * 1: enable
+ * Access: RW
+ */
+MLXSW_ITEM_BIT_ARRAY(reg, momte, tclass_en, 0x08, 0x08, 1);
+
+static inline void mlxsw_reg_momte_pack(char *payload, u8 local_port,
+					enum mlxsw_reg_momte_type type)
+{
+	MLXSW_REG_ZERO(momte, payload);
+	mlxsw_reg_momte_local_port_set(payload, local_port);
+	mlxsw_reg_momte_type_set(payload, type);
+}
+
 /* MTPPPC - Time Precision Packet Port Configuration
  * -------------------------------------------------
  * This register serves for configuration of which PTP messages should be
@@ -10853,6 +10902,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(mgpc),
 	MLXSW_REG(mprs),
 	MLXSW_REG(mogcr),
+	MLXSW_REG(momte),
 	MLXSW_REG(mtpppc),
 	MLXSW_REG(mtpptr),
 	MLXSW_REG(mtptpt),
-- 
2.20.1

[PATCH net-next v2 03/13] mlxsw: reg: Add Monitoring Port Analyzer Global Register

[Petr Machata]

From: Amit Cohen <amitc@mellanox.com>

This register is used for global port analyzer configurations.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 52 +++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index aa2fd7debec2..76f61bef03f8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -9502,6 +9502,57 @@ MLXSW_ITEM32(reg, mogcr, ptp_iftc, 0x00, 1, 1);
  */
 MLXSW_ITEM32(reg, mogcr, ptp_eftc, 0x00, 0, 1);
 
+/* MPAGR - Monitoring Port Analyzer Global Register
+ * ------------------------------------------------
+ * This register is used for global port analyzer configurations.
+ * Note: This register is not supported by current FW versions for Spectrum-1.
+ */
+#define MLXSW_REG_MPAGR_ID 0x9089
+#define MLXSW_REG_MPAGR_LEN 0x0C
+
+MLXSW_REG_DEFINE(mpagr, MLXSW_REG_MPAGR_ID, MLXSW_REG_MPAGR_LEN);
+
+enum mlxsw_reg_mpagr_trigger {
+	MLXSW_REG_MPAGR_TRIGGER_EGRESS,
+	MLXSW_REG_MPAGR_TRIGGER_INGRESS,
+	MLXSW_REG_MPAGR_TRIGGER_INGRESS_WRED,
+	MLXSW_REG_MPAGR_TRIGGER_INGRESS_SHARED_BUFFER,
+	MLXSW_REG_MPAGR_TRIGGER_INGRESS_ING_CONG,
+	MLXSW_REG_MPAGR_TRIGGER_INGRESS_EGR_CONG,
+	MLXSW_REG_MPAGR_TRIGGER_EGRESS_ECN,
+	MLXSW_REG_MPAGR_TRIGGER_EGRESS_HIGH_LATENCY,
+};
+
+/* reg_mpagr_trigger
+ * Mirror trigger.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, mpagr, trigger, 0x00, 0, 4);
+
+/* reg_mpagr_pa_id
+ * Port analyzer ID.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, mpagr, pa_id, 0x04, 0, 4);
+
+/* reg_mpagr_probability_rate
+ * Sampling rate.
+ * Valid values are: 1 to 3.5*10^9
+ * Value of 1 means "sample all". Default is 1.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, mpagr, probability_rate, 0x08, 0, 32);
+
+static inline void mlxsw_reg_mpagr_pack(char *payload,
+					enum mlxsw_reg_mpagr_trigger trigger,
+					u8 pa_id, u32 probability_rate)
+{
+	MLXSW_REG_ZERO(mpagr, payload);
+	mlxsw_reg_mpagr_trigger_set(payload, trigger);
+	mlxsw_reg_mpagr_pa_id_set(payload, pa_id);
+	mlxsw_reg_mpagr_probability_rate_set(payload, probability_rate);
+}
+
 /* MOMTE - Monitoring Mirror Trigger Enable Register
  * -------------------------------------------------
  * This register is used to configure the mirror enable for different mirror
@@ -10902,6 +10953,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(mgpc),
 	MLXSW_REG(mprs),
 	MLXSW_REG(mogcr),
+	MLXSW_REG(mpagr),
 	MLXSW_REG(momte),
 	MLXSW_REG(mtpppc),
 	MLXSW_REG(mtpptr),
-- 
2.20.1

[PATCH net-next v2 04/13] mlxsw: spectrum_span: Move SPAN operations out of global file

[Petr Machata]

From: Ido Schimmel <idosch@mellanox.com>

The per-ASIC SPAN operations are relevant to the SPAN module and
therefore should be implemented there and not in the main driver file.
Move them.

These operations will be extended later on.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    | 50 -------------------
 .../net/ethernet/mellanox/mlxsw/spectrum.h    |  1 -
 .../ethernet/mellanox/mlxsw/spectrum_span.c   | 47 +++++++++++++++++
 .../ethernet/mellanox/mlxsw/spectrum_span.h   |  8 +++
 4 files changed, 55 insertions(+), 51 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index eeeafd1d82ce..636dd09cbbbc 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -175,10 +175,6 @@ struct mlxsw_sp_mlxfw_dev {
 	struct mlxsw_sp *mlxsw_sp;
 };
 
-struct mlxsw_sp_span_ops {
-	u32 (*buffsize_get)(int mtu, u32 speed);
-};
-
 static int mlxsw_sp_component_query(struct mlxfw_dev *mlxfw_dev,
 				    u16 component_index, u32 *p_max_size,
 				    u8 *p_align_bits, u16 *p_max_write_size)
@@ -2812,52 +2808,6 @@ static const struct mlxsw_sp_ptp_ops mlxsw_sp2_ptp_ops = {
 	.get_stats	= mlxsw_sp2_get_stats,
 };
 
-static u32 mlxsw_sp1_span_buffsize_get(int mtu, u32 speed)
-{
-	return mtu * 5 / 2;
-}
-
-static const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
-	.buffsize_get = mlxsw_sp1_span_buffsize_get,
-};
-
-#define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
-#define MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR 50
-
-static u32 __mlxsw_sp_span_buffsize_get(int mtu, u32 speed, u32 buffer_factor)
-{
-	return 3 * mtu + buffer_factor * speed / 1000;
-}
-
-static u32 mlxsw_sp2_span_buffsize_get(int mtu, u32 speed)
-{
-	int factor = MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR;
-
-	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
-}
-
-static const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
-	.buffsize_get = mlxsw_sp2_span_buffsize_get,
-};
-
-static u32 mlxsw_sp3_span_buffsize_get(int mtu, u32 speed)
-{
-	int factor = MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR;
-
-	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
-}
-
-static const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops = {
-	.buffsize_get = mlxsw_sp3_span_buffsize_get,
-};
-
-u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu, u32 speed)
-{
-	u32 buffsize = mlxsw_sp->span_ops->buffsize_get(speed, mtu);
-
-	return mlxsw_sp_bytes_cells(mlxsw_sp, buffsize) + 1;
-}
-
 static int mlxsw_sp_netdevice_event(struct notifier_block *unused,
 				    unsigned long event, void *ptr);
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 1d6b2bc2774c..18c64f7b265d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -539,7 +539,6 @@ int mlxsw_sp_flow_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 				unsigned int *p_counter_index);
 void mlxsw_sp_flow_counter_free(struct mlxsw_sp *mlxsw_sp,
 				unsigned int counter_index);
-u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu, u32 speed);
 bool mlxsw_sp_port_dev_check(const struct net_device *dev);
 struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev);
 struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find(struct net_device *dev);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 92351a79addc..49e2a417ec0e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -766,6 +766,14 @@ static int mlxsw_sp_span_entry_put(struct mlxsw_sp *mlxsw_sp,
 	return 0;
 }
 
+static u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu,
+				      u32 speed)
+{
+	u32 buffsize = mlxsw_sp->span_ops->buffsize_get(speed, mtu);
+
+	return mlxsw_sp_bytes_cells(mlxsw_sp, buffsize) + 1;
+}
+
 static int
 mlxsw_sp_span_port_buffer_update(struct mlxsw_sp_port *mlxsw_sp_port, u16 mtu)
 {
@@ -1207,3 +1215,42 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 
 	mlxsw_sp_span_trigger_entry_destroy(mlxsw_sp->span, trigger_entry);
 }
+
+static u32 mlxsw_sp1_span_buffsize_get(int mtu, u32 speed)
+{
+	return mtu * 5 / 2;
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
+	.buffsize_get = mlxsw_sp1_span_buffsize_get,
+};
+
+#define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
+#define MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR 50
+
+static u32 __mlxsw_sp_span_buffsize_get(int mtu, u32 speed, u32 buffer_factor)
+{
+	return 3 * mtu + buffer_factor * speed / 1000;
+}
+
+static u32 mlxsw_sp2_span_buffsize_get(int mtu, u32 speed)
+{
+	int factor = MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR;
+
+	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
+	.buffsize_get = mlxsw_sp2_span_buffsize_get,
+};
+
+static u32 mlxsw_sp3_span_buffsize_get(int mtu, u32 speed)
+{
+	int factor = MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR;
+
+	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops = {
+	.buffsize_get = mlxsw_sp3_span_buffsize_get,
+};
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index 9f6dd2d0f4e6..440551ec0dba 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -34,6 +34,10 @@ struct mlxsw_sp_span_trigger_parms {
 
 struct mlxsw_sp_span_entry_ops;
 
+struct mlxsw_sp_span_ops {
+	u32 (*buffsize_get)(int mtu, u32 speed);
+};
+
 struct mlxsw_sp_span_entry {
 	const struct net_device *to_dev;
 	const struct mlxsw_sp_span_entry_ops *ops;
@@ -82,4 +86,8 @@ mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 			   struct mlxsw_sp_port *mlxsw_sp_port,
 			   const struct mlxsw_sp_span_trigger_parms *parms);
 
+extern const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops;
+extern const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops;
+extern const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops;
+
 #endif
-- 
2.20.1

[PATCH net-next v2 05/13] mlxsw: spectrum_span: Prepare for global mirroring triggers

[Petr Machata]

From: Ido Schimmel <idosch@mellanox.com>

Currently, a SPAN agent can only be bound to a per-port trigger where
the trigger is either an incoming packet (INGRESS) or an outgoing packet
(EGRESS) to / from the port.

The subsequent patch will introduce the concept of global mirroring
triggers. The binding / unbinding of global triggers is different than
that of per-port triggers. Such triggers also need to be enabled /
disabled on a per-{port, TC} basis and are only supported from
Spectrum-2 onwards.

Add trigger operations that allow us to abstract these differences. Only
implement the operations for per-port triggers. Next patch will
implement the operations for global triggers.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../ethernet/mellanox/mlxsw/spectrum_span.c   | 119 +++++++++++++++---
 .../ethernet/mellanox/mlxsw/spectrum_span.h   |   1 +
 2 files changed, 103 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 49e2a417ec0e..b20422dde147 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -21,6 +21,7 @@
 struct mlxsw_sp_span {
 	struct work_struct work;
 	struct mlxsw_sp *mlxsw_sp;
+	const struct mlxsw_sp_span_trigger_ops **span_trigger_ops_arr;
 	struct list_head analyzed_ports_list;
 	struct mutex analyzed_ports_lock; /* Protects analyzed_ports_list */
 	struct list_head trigger_entries_list;
@@ -38,12 +39,26 @@ struct mlxsw_sp_span_analyzed_port {
 
 struct mlxsw_sp_span_trigger_entry {
 	struct list_head list; /* Member of trigger_entries_list */
+	struct mlxsw_sp_span *span;
+	const struct mlxsw_sp_span_trigger_ops *ops;
 	refcount_t ref_count;
 	u8 local_port;
 	enum mlxsw_sp_span_trigger trigger;
 	struct mlxsw_sp_span_trigger_parms parms;
 };
 
+enum mlxsw_sp_span_trigger_type {
+	MLXSW_SP_SPAN_TRIGGER_TYPE_PORT,
+};
+
+struct mlxsw_sp_span_trigger_ops {
+	int (*bind)(struct mlxsw_sp_span_trigger_entry *trigger_entry);
+	void (*unbind)(struct mlxsw_sp_span_trigger_entry *trigger_entry);
+	bool (*matches)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
+			enum mlxsw_sp_span_trigger trigger,
+			struct mlxsw_sp_port *mlxsw_sp_port);
+};
+
 static void mlxsw_sp_span_respin_work(struct work_struct *work);
 
 static u64 mlxsw_sp_span_occ_get(void *priv)
@@ -57,7 +72,7 @@ int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
 {
 	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
 	struct mlxsw_sp_span *span;
-	int i, entries_count;
+	int i, entries_count, err;
 
 	if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_SPAN))
 		return -EIO;
@@ -77,11 +92,20 @@ int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
 	for (i = 0; i < mlxsw_sp->span->entries_count; i++)
 		mlxsw_sp->span->entries[i].id = i;
 
+	err = mlxsw_sp->span_ops->init(mlxsw_sp);
+	if (err)
+		goto err_init;
+
 	devlink_resource_occ_get_register(devlink, MLXSW_SP_RESOURCE_SPAN,
 					  mlxsw_sp_span_occ_get, mlxsw_sp);
 	INIT_WORK(&span->work, mlxsw_sp_span_respin_work);
 
 	return 0;
+
+err_init:
+	mutex_destroy(&mlxsw_sp->span->analyzed_ports_lock);
+	kfree(mlxsw_sp->span);
+	return err;
 }
 
 void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp)
@@ -1059,9 +1083,9 @@ void mlxsw_sp_span_analyzed_port_put(struct mlxsw_sp_port *mlxsw_sp_port,
 }
 
 static int
-__mlxsw_sp_span_trigger_entry_bind(struct mlxsw_sp_span *span,
-				   struct mlxsw_sp_span_trigger_entry *
-				   trigger_entry, bool enable)
+__mlxsw_sp_span_trigger_port_bind(struct mlxsw_sp_span *span,
+				  struct mlxsw_sp_span_trigger_entry *
+				  trigger_entry, bool enable)
 {
 	char mpar_pl[MLXSW_REG_MPAR_LEN];
 	enum mlxsw_reg_mpar_i_e i_e;
@@ -1084,19 +1108,60 @@ __mlxsw_sp_span_trigger_entry_bind(struct mlxsw_sp_span *span,
 }
 
 static int
-mlxsw_sp_span_trigger_entry_bind(struct mlxsw_sp_span *span,
-				 struct mlxsw_sp_span_trigger_entry *
-				 trigger_entry)
+mlxsw_sp_span_trigger_port_bind(struct mlxsw_sp_span_trigger_entry *
+				trigger_entry)
 {
-	return __mlxsw_sp_span_trigger_entry_bind(span, trigger_entry, true);
+	return __mlxsw_sp_span_trigger_port_bind(trigger_entry->span,
+						 trigger_entry, true);
 }
 
 static void
-mlxsw_sp_span_trigger_entry_unbind(struct mlxsw_sp_span *span,
-				   struct mlxsw_sp_span_trigger_entry *
-				   trigger_entry)
+mlxsw_sp_span_trigger_port_unbind(struct mlxsw_sp_span_trigger_entry *
+				  trigger_entry)
 {
-	__mlxsw_sp_span_trigger_entry_bind(span, trigger_entry, false);
+	__mlxsw_sp_span_trigger_port_bind(trigger_entry->span, trigger_entry,
+					  false);
+}
+
+static bool
+mlxsw_sp_span_trigger_port_matches(struct mlxsw_sp_span_trigger_entry *
+				   trigger_entry,
+				   enum mlxsw_sp_span_trigger trigger,
+				   struct mlxsw_sp_port *mlxsw_sp_port)
+{
+	return trigger_entry->trigger == trigger &&
+	       trigger_entry->local_port == mlxsw_sp_port->local_port;
+}
+
+static const struct mlxsw_sp_span_trigger_ops
+mlxsw_sp_span_trigger_port_ops = {
+	.bind = mlxsw_sp_span_trigger_port_bind,
+	.unbind = mlxsw_sp_span_trigger_port_unbind,
+	.matches = mlxsw_sp_span_trigger_port_matches,
+};
+
+static const struct mlxsw_sp_span_trigger_ops *
+mlxsw_sp_span_trigger_ops_arr[] = {
+	[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
+};
+
+static void
+mlxsw_sp_span_trigger_ops_set(struct mlxsw_sp_span_trigger_entry *trigger_entry)
+{
+	struct mlxsw_sp_span *span = trigger_entry->span;
+	enum mlxsw_sp_span_trigger_type type;
+
+	switch (trigger_entry->trigger) {
+	case MLXSW_SP_SPAN_TRIGGER_INGRESS: /* fall-through */
+	case MLXSW_SP_SPAN_TRIGGER_EGRESS:
+		type = MLXSW_SP_SPAN_TRIGGER_TYPE_PORT;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return;
+	}
+
+	trigger_entry->ops = span->span_trigger_ops_arr[type];
 }
 
 static struct mlxsw_sp_span_trigger_entry *
@@ -1114,12 +1179,15 @@ mlxsw_sp_span_trigger_entry_create(struct mlxsw_sp_span *span,
 		return ERR_PTR(-ENOMEM);
 
 	refcount_set(&trigger_entry->ref_count, 1);
-	trigger_entry->local_port = mlxsw_sp_port->local_port;
+	trigger_entry->local_port = mlxsw_sp_port ? mlxsw_sp_port->local_port :
+						    0;
 	trigger_entry->trigger = trigger;
 	memcpy(&trigger_entry->parms, parms, sizeof(trigger_entry->parms));
+	trigger_entry->span = span;
+	mlxsw_sp_span_trigger_ops_set(trigger_entry);
 	list_add_tail(&trigger_entry->list, &span->trigger_entries_list);
 
-	err = mlxsw_sp_span_trigger_entry_bind(span, trigger_entry);
+	err = trigger_entry->ops->bind(trigger_entry);
 	if (err)
 		goto err_trigger_entry_bind;
 
@@ -1136,7 +1204,7 @@ mlxsw_sp_span_trigger_entry_destroy(struct mlxsw_sp_span *span,
 				    struct mlxsw_sp_span_trigger_entry *
 				    trigger_entry)
 {
-	mlxsw_sp_span_trigger_entry_unbind(span, trigger_entry);
+	trigger_entry->ops->unbind(trigger_entry);
 	list_del(&trigger_entry->list);
 	kfree(trigger_entry);
 }
@@ -1149,8 +1217,8 @@ mlxsw_sp_span_trigger_entry_find(struct mlxsw_sp_span *span,
 	struct mlxsw_sp_span_trigger_entry *trigger_entry;
 
 	list_for_each_entry(trigger_entry, &span->trigger_entries_list, list) {
-		if (trigger_entry->trigger == trigger &&
-		    trigger_entry->local_port == mlxsw_sp_port->local_port)
+		if (trigger_entry->ops->matches(trigger_entry, trigger,
+						mlxsw_sp_port))
 			return trigger_entry;
 	}
 
@@ -1216,15 +1284,30 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_sp_span_trigger_entry_destroy(mlxsw_sp->span, trigger_entry);
 }
 
+static int mlxsw_sp1_span_init(struct mlxsw_sp *mlxsw_sp)
+{
+	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+
+	return 0;
+}
+
 static u32 mlxsw_sp1_span_buffsize_get(int mtu, u32 speed)
 {
 	return mtu * 5 / 2;
 }
 
 const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
+	.init = mlxsw_sp1_span_init,
 	.buffsize_get = mlxsw_sp1_span_buffsize_get,
 };
 
+static int mlxsw_sp2_span_init(struct mlxsw_sp *mlxsw_sp)
+{
+	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+
+	return 0;
+}
+
 #define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
 #define MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR 50
 
@@ -1241,6 +1324,7 @@ static u32 mlxsw_sp2_span_buffsize_get(int mtu, u32 speed)
 }
 
 const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
+	.init = mlxsw_sp2_span_init,
 	.buffsize_get = mlxsw_sp2_span_buffsize_get,
 };
 
@@ -1252,5 +1336,6 @@ static u32 mlxsw_sp3_span_buffsize_get(int mtu, u32 speed)
 }
 
 const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops = {
+	.init = mlxsw_sp2_span_init,
 	.buffsize_get = mlxsw_sp3_span_buffsize_get,
 };
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index 440551ec0dba..b9acecaf6ee2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -35,6 +35,7 @@ struct mlxsw_sp_span_trigger_parms {
 struct mlxsw_sp_span_entry_ops;
 
 struct mlxsw_sp_span_ops {
+	int (*init)(struct mlxsw_sp *mlxsw_sp);
 	u32 (*buffsize_get)(int mtu, u32 speed);
 };
 
-- 
2.20.1

[PATCH net-next v2 06/13] mlxsw: spectrum_span: Add support for global mirroring triggers

[Petr Machata]

From: Ido Schimmel <idosch@mellanox.com>

Global mirroring triggers are triggers that are only keyed by their
trigger, as opposed to per-port triggers, which are keyed by their
trigger and port.

Such triggers allow mirroring packets that were tail/early dropped or
ECN marked to a SPAN agent.

Implement the previously added trigger operations for these global
triggers. Since such triggers are only supported from Spectrum-2
onwards, have the Spectrum-1 operations return an error.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../ethernet/mellanox/mlxsw/spectrum_span.c   | 104 +++++++++++++++++-
 .../ethernet/mellanox/mlxsw/spectrum_span.h   |   3 +
 2 files changed, 104 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index b20422dde147..fa223c1351b4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -49,6 +49,7 @@ struct mlxsw_sp_span_trigger_entry {
 
 enum mlxsw_sp_span_trigger_type {
 	MLXSW_SP_SPAN_TRIGGER_TYPE_PORT,
+	MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL,
 };
 
 struct mlxsw_sp_span_trigger_ops {
@@ -1140,9 +1141,101 @@ mlxsw_sp_span_trigger_port_ops = {
 	.matches = mlxsw_sp_span_trigger_port_matches,
 };
 
+static int
+mlxsw_sp1_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
+				   trigger_entry)
+{
+	return -EOPNOTSUPP;
+}
+
+static void
+mlxsw_sp1_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
+				     trigger_entry)
+{
+}
+
+static bool
+mlxsw_sp1_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
+				      trigger_entry,
+				      enum mlxsw_sp_span_trigger trigger,
+				      struct mlxsw_sp_port *mlxsw_sp_port)
+{
+	WARN_ON_ONCE(1);
+	return false;
+}
+
+static const struct mlxsw_sp_span_trigger_ops
+mlxsw_sp1_span_trigger_global_ops = {
+	.bind = mlxsw_sp1_span_trigger_global_bind,
+	.unbind = mlxsw_sp1_span_trigger_global_unbind,
+	.matches = mlxsw_sp1_span_trigger_global_matches,
+};
+
 static const struct mlxsw_sp_span_trigger_ops *
-mlxsw_sp_span_trigger_ops_arr[] = {
+mlxsw_sp1_span_trigger_ops_arr[] = {
 	[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
+	[MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
+		&mlxsw_sp1_span_trigger_global_ops,
+};
+
+static int
+mlxsw_sp2_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
+				   trigger_entry)
+{
+	struct mlxsw_sp *mlxsw_sp = trigger_entry->span->mlxsw_sp;
+	enum mlxsw_reg_mpagr_trigger trigger;
+	char mpagr_pl[MLXSW_REG_MPAGR_LEN];
+
+	switch (trigger_entry->trigger) {
+	case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
+		trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_SHARED_BUFFER;
+		break;
+	case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
+		trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_WRED;
+		break;
+	case MLXSW_SP_SPAN_TRIGGER_ECN:
+		trigger = MLXSW_REG_MPAGR_TRIGGER_EGRESS_ECN;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -EINVAL;
+	}
+
+	mlxsw_reg_mpagr_pack(mpagr_pl, trigger, trigger_entry->parms.span_id,
+			     1);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpagr), mpagr_pl);
+}
+
+static void
+mlxsw_sp2_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
+				     trigger_entry)
+{
+	/* There is no unbinding for global triggers. The trigger should be
+	 * disabled on all ports by now.
+	 */
+}
+
+static bool
+mlxsw_sp2_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
+				      trigger_entry,
+				      enum mlxsw_sp_span_trigger trigger,
+				      struct mlxsw_sp_port *mlxsw_sp_port)
+{
+	return trigger_entry->trigger == trigger;
+}
+
+static const struct mlxsw_sp_span_trigger_ops
+mlxsw_sp2_span_trigger_global_ops = {
+	.bind = mlxsw_sp2_span_trigger_global_bind,
+	.unbind = mlxsw_sp2_span_trigger_global_unbind,
+	.matches = mlxsw_sp2_span_trigger_global_matches,
+};
+
+static const struct mlxsw_sp_span_trigger_ops *
+mlxsw_sp2_span_trigger_ops_arr[] = {
+	[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
+	[MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
+		&mlxsw_sp2_span_trigger_global_ops,
 };
 
 static void
@@ -1156,6 +1249,11 @@ mlxsw_sp_span_trigger_ops_set(struct mlxsw_sp_span_trigger_entry *trigger_entry)
 	case MLXSW_SP_SPAN_TRIGGER_EGRESS:
 		type = MLXSW_SP_SPAN_TRIGGER_TYPE_PORT;
 		break;
+	case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP: /* fall-through */
+	case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP: /* fall-through */
+	case MLXSW_SP_SPAN_TRIGGER_ECN:
+		type = MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL;
+		break;
 	default:
 		WARN_ON_ONCE(1);
 		return;
@@ -1286,7 +1384,7 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 
 static int mlxsw_sp1_span_init(struct mlxsw_sp *mlxsw_sp)
 {
-	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp1_span_trigger_ops_arr;
 
 	return 0;
 }
@@ -1303,7 +1401,7 @@ const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
 
 static int mlxsw_sp2_span_init(struct mlxsw_sp *mlxsw_sp)
 {
-	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp2_span_trigger_ops_arr;
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index b9acecaf6ee2..bb7939b3f09c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -26,6 +26,9 @@ struct mlxsw_sp_span_parms {
 enum mlxsw_sp_span_trigger {
 	MLXSW_SP_SPAN_TRIGGER_INGRESS,
 	MLXSW_SP_SPAN_TRIGGER_EGRESS,
+	MLXSW_SP_SPAN_TRIGGER_TAIL_DROP,
+	MLXSW_SP_SPAN_TRIGGER_EARLY_DROP,
+	MLXSW_SP_SPAN_TRIGGER_ECN,
 };
 
 struct mlxsw_sp_span_trigger_parms {
-- 
2.20.1

[PATCH net-next v2 07/13] mlxsw: spectrum_span: Add APIs to enable / disable global mirroring triggers

[Petr Machata]

From: Ido Schimmel <idosch@mellanox.com>

While the binding of global mirroring triggers to a SPAN agent is
global, packets are only mirrored if they belong to a port and TC on
which the trigger was enabled. This allows, for example, to mirror
packets that were tail-dropped on a specific netdev.

Implement the operations that allow to enable / disable a global
mirroring trigger on a specific port and TC.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../ethernet/mellanox/mlxsw/spectrum_span.c   | 135 ++++++++++++++++++
 .../ethernet/mellanox/mlxsw/spectrum_span.h   |   4 +
 2 files changed, 139 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index fa223c1351b4..6374765a112d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -58,6 +58,10 @@ struct mlxsw_sp_span_trigger_ops {
 	bool (*matches)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
 			enum mlxsw_sp_span_trigger trigger,
 			struct mlxsw_sp_port *mlxsw_sp_port);
+	int (*enable)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
+		      struct mlxsw_sp_port *mlxsw_sp_port, u8 tc);
+	void (*disable)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
+			struct mlxsw_sp_port *mlxsw_sp_port, u8 tc);
 };
 
 static void mlxsw_sp_span_respin_work(struct work_struct *work);
@@ -1134,11 +1138,29 @@ mlxsw_sp_span_trigger_port_matches(struct mlxsw_sp_span_trigger_entry *
 	       trigger_entry->local_port == mlxsw_sp_port->local_port;
 }
 
+static int
+mlxsw_sp_span_trigger_port_enable(struct mlxsw_sp_span_trigger_entry *
+				  trigger_entry,
+				  struct mlxsw_sp_port *mlxsw_sp_port, u8 tc)
+{
+	/* Port trigger are enabled during binding. */
+	return 0;
+}
+
+static void
+mlxsw_sp_span_trigger_port_disable(struct mlxsw_sp_span_trigger_entry *
+				   trigger_entry,
+				   struct mlxsw_sp_port *mlxsw_sp_port, u8 tc)
+{
+}
+
 static const struct mlxsw_sp_span_trigger_ops
 mlxsw_sp_span_trigger_port_ops = {
 	.bind = mlxsw_sp_span_trigger_port_bind,
 	.unbind = mlxsw_sp_span_trigger_port_unbind,
 	.matches = mlxsw_sp_span_trigger_port_matches,
+	.enable = mlxsw_sp_span_trigger_port_enable,
+	.disable = mlxsw_sp_span_trigger_port_disable,
 };
 
 static int
@@ -1164,11 +1186,30 @@ mlxsw_sp1_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
 	return false;
 }
 
+static int
+mlxsw_sp1_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
+				     trigger_entry,
+				     struct mlxsw_sp_port *mlxsw_sp_port,
+				     u8 tc)
+{
+	return -EOPNOTSUPP;
+}
+
+static void
+mlxsw_sp1_span_trigger_global_disable(struct mlxsw_sp_span_trigger_entry *
+				      trigger_entry,
+				      struct mlxsw_sp_port *mlxsw_sp_port,
+				      u8 tc)
+{
+}
+
 static const struct mlxsw_sp_span_trigger_ops
 mlxsw_sp1_span_trigger_global_ops = {
 	.bind = mlxsw_sp1_span_trigger_global_bind,
 	.unbind = mlxsw_sp1_span_trigger_global_unbind,
 	.matches = mlxsw_sp1_span_trigger_global_matches,
+	.enable = mlxsw_sp1_span_trigger_global_enable,
+	.disable = mlxsw_sp1_span_trigger_global_disable,
 };
 
 static const struct mlxsw_sp_span_trigger_ops *
@@ -1224,11 +1265,71 @@ mlxsw_sp2_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
 	return trigger_entry->trigger == trigger;
 }
 
+static int
+__mlxsw_sp2_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
+				       trigger_entry,
+				       struct mlxsw_sp_port *mlxsw_sp_port,
+				       u8 tc, bool enable)
+{
+	struct mlxsw_sp *mlxsw_sp = trigger_entry->span->mlxsw_sp;
+	char momte_pl[MLXSW_REG_MOMTE_LEN];
+	enum mlxsw_reg_momte_type type;
+	int err;
+
+	switch (trigger_entry->trigger) {
+	case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
+		type = MLXSW_REG_MOMTE_TYPE_SHARED_BUFFER_TCLASS;
+		break;
+	case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
+		type = MLXSW_REG_MOMTE_TYPE_WRED;
+		break;
+	case MLXSW_SP_SPAN_TRIGGER_ECN:
+		type = MLXSW_REG_MOMTE_TYPE_ECN;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -EINVAL;
+	}
+
+	/* Query existing configuration in order to only change the state of
+	 * the specified traffic class.
+	 */
+	mlxsw_reg_momte_pack(momte_pl, mlxsw_sp_port->local_port, type);
+	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(momte), momte_pl);
+	if (err)
+		return err;
+
+	mlxsw_reg_momte_tclass_en_set(momte_pl, tc, enable);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(momte), momte_pl);
+}
+
+static int
+mlxsw_sp2_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
+				     trigger_entry,
+				     struct mlxsw_sp_port *mlxsw_sp_port,
+				     u8 tc)
+{
+	return __mlxsw_sp2_span_trigger_global_enable(trigger_entry,
+						      mlxsw_sp_port, tc, true);
+}
+
+static void
+mlxsw_sp2_span_trigger_global_disable(struct mlxsw_sp_span_trigger_entry *
+				      trigger_entry,
+				      struct mlxsw_sp_port *mlxsw_sp_port,
+				      u8 tc)
+{
+	__mlxsw_sp2_span_trigger_global_enable(trigger_entry, mlxsw_sp_port, tc,
+					       false);
+}
+
 static const struct mlxsw_sp_span_trigger_ops
 mlxsw_sp2_span_trigger_global_ops = {
 	.bind = mlxsw_sp2_span_trigger_global_bind,
 	.unbind = mlxsw_sp2_span_trigger_global_unbind,
 	.matches = mlxsw_sp2_span_trigger_global_matches,
+	.enable = mlxsw_sp2_span_trigger_global_enable,
+	.disable = mlxsw_sp2_span_trigger_global_disable,
 };
 
 static const struct mlxsw_sp_span_trigger_ops *
@@ -1382,6 +1483,40 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_sp_span_trigger_entry_destroy(mlxsw_sp->span, trigger_entry);
 }
 
+int mlxsw_sp_span_trigger_enable(struct mlxsw_sp_port *mlxsw_sp_port,
+				 enum mlxsw_sp_span_trigger trigger, u8 tc)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_span_trigger_entry *trigger_entry;
+
+	ASSERT_RTNL();
+
+	trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
+							 trigger,
+							 mlxsw_sp_port);
+	if (WARN_ON_ONCE(!trigger_entry))
+		return -EINVAL;
+
+	return trigger_entry->ops->enable(trigger_entry, mlxsw_sp_port, tc);
+}
+
+void mlxsw_sp_span_trigger_disable(struct mlxsw_sp_port *mlxsw_sp_port,
+				   enum mlxsw_sp_span_trigger trigger, u8 tc)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_span_trigger_entry *trigger_entry;
+
+	ASSERT_RTNL();
+
+	trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
+							 trigger,
+							 mlxsw_sp_port);
+	if (WARN_ON_ONCE(!trigger_entry))
+		return;
+
+	return trigger_entry->ops->disable(trigger_entry, mlxsw_sp_port, tc);
+}
+
 static int mlxsw_sp1_span_init(struct mlxsw_sp *mlxsw_sp)
 {
 	mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp1_span_trigger_ops_arr;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index bb7939b3f09c..29b96b222e25 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -89,6 +89,10 @@ mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 			   enum mlxsw_sp_span_trigger trigger,
 			   struct mlxsw_sp_port *mlxsw_sp_port,
 			   const struct mlxsw_sp_span_trigger_parms *parms);
+int mlxsw_sp_span_trigger_enable(struct mlxsw_sp_port *mlxsw_sp_port,
+				 enum mlxsw_sp_span_trigger trigger, u8 tc);
+void mlxsw_sp_span_trigger_disable(struct mlxsw_sp_port *mlxsw_sp_port,
+				   enum mlxsw_sp_span_trigger trigger, u8 tc);
 
 extern const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops;
 extern const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops;
-- 
2.20.1

[PATCH net-next v2 08/13] mlxsw: spectrum_flow: Convert a goto to a return

[Petr Machata]

No clean-up is performed at the target label of this goto. Convert it to a
direct return.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
index 47b66f347ff1..421581a85cd6 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
@@ -219,8 +219,7 @@ static int mlxsw_sp_setup_tc_block_bind(struct mlxsw_sp_port *mlxsw_sp_port,
 					       mlxsw_sp_tc_block_release);
 		if (IS_ERR(block_cb)) {
 			mlxsw_sp_flow_block_destroy(flow_block);
-			err = PTR_ERR(block_cb);
-			goto err_cb_register;
+			return PTR_ERR(block_cb);
 		}
 		register_block = true;
 	} else {
@@ -247,7 +246,6 @@ static int mlxsw_sp_setup_tc_block_bind(struct mlxsw_sp_port *mlxsw_sp_port,
 err_block_bind:
 	if (!flow_block_cb_decref(block_cb))
 		flow_block_cb_free(block_cb);
-err_cb_register:
 	return err;
 }
 
-- 
2.20.1

[PATCH net-next v2 09/13] mlxsw: spectrum_flow: Drop an unused field

[Petr Machata]

The field "dev" in struct mlxsw_sp_flow_block_binding is not used. Drop it.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 18c64f7b265d..ab54790d2955 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -710,7 +710,6 @@ struct mlxsw_sp_flow_block {
 
 struct mlxsw_sp_flow_block_binding {
 	struct list_head list;
-	struct net_device *dev;
 	struct mlxsw_sp_port *mlxsw_sp_port;
 	bool ingress;
 };
-- 
2.20.1

[PATCH net-next v2 10/13] mlxsw: spectrum_matchall: Publish matchall data structures

[Petr Machata]

A following patch introduces offloading of filters attached to blocks bound
to the RED tail_drop qevent. The only classifier that mlxsw will permit in
this role is matchall. mlxsw currently offloads matchall filters used with
clsact qdisc. The data structures used for that offload will come handy for
the qevent offload as well. Publish them in spectrum.h.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum.h    | 24 +++++++++++++++++++
 .../mellanox/mlxsw/spectrum_matchall.c        | 23 ------------------
 2 files changed, 24 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index ab54790d2955..51047b1aa23a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -960,6 +960,30 @@ extern const struct mlxsw_afk_ops mlxsw_sp1_afk_ops;
 extern const struct mlxsw_afk_ops mlxsw_sp2_afk_ops;
 
 /* spectrum_matchall.c */
+enum mlxsw_sp_mall_action_type {
+	MLXSW_SP_MALL_ACTION_TYPE_MIRROR,
+	MLXSW_SP_MALL_ACTION_TYPE_SAMPLE,
+	MLXSW_SP_MALL_ACTION_TYPE_TRAP,
+};
+
+struct mlxsw_sp_mall_mirror_entry {
+	const struct net_device *to_dev;
+	int span_id;
+};
+
+struct mlxsw_sp_mall_entry {
+	struct list_head list;
+	unsigned long cookie;
+	unsigned int priority;
+	enum mlxsw_sp_mall_action_type type;
+	bool ingress;
+	union {
+		struct mlxsw_sp_mall_mirror_entry mirror;
+		struct mlxsw_sp_port_sample sample;
+	};
+	struct rcu_head rcu;
+};
+
 int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
 			  struct mlxsw_sp_flow_block *block,
 			  struct tc_cls_matchall_offload *f);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index f1a44a8eda55..195e28ab8e65 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -10,29 +10,6 @@
 #include "spectrum_span.h"
 #include "reg.h"
 
-enum mlxsw_sp_mall_action_type {
-	MLXSW_SP_MALL_ACTION_TYPE_MIRROR,
-	MLXSW_SP_MALL_ACTION_TYPE_SAMPLE,
-};
-
-struct mlxsw_sp_mall_mirror_entry {
-	const struct net_device *to_dev;
-	int span_id;
-};
-
-struct mlxsw_sp_mall_entry {
-	struct list_head list;
-	unsigned long cookie;
-	unsigned int priority;
-	enum mlxsw_sp_mall_action_type type;
-	bool ingress;
-	union {
-		struct mlxsw_sp_mall_mirror_entry mirror;
-		struct mlxsw_sp_port_sample sample;
-	};
-	struct rcu_head rcu;
-};
-
 static struct mlxsw_sp_mall_entry *
 mlxsw_sp_mall_entry_find(struct mlxsw_sp_flow_block *block, unsigned long cookie)
 {
-- 
2.20.1

[PATCH net-next v2 11/13] mlxsw: spectrum_flow: Promote binder-type dispatch to spectrum.c

[Petr Machata]

Two RED qevents have been introduced recently. From the point of view of a
driver, qevents are simply blocks with unusual binder types. However they
need to be handled by different logic than ACL-like flows.

Thus rename mlxsw_sp_setup_tc_block() to mlxsw_sp_setup_tc_block_clsact()
and move the binder-type dispatch from there to spectrum.c into a new
function of the original name. The new dispatcher is easier to extend with
new binder types.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c     | 13 +++++++++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     |  5 +++--
 .../net/ethernet/mellanox/mlxsw/spectrum_flow.c    | 14 +++-----------
 3 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 636dd09cbbbc..2235c4bf330d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1329,6 +1329,19 @@ static int mlxsw_sp_port_kill_vid(struct net_device *dev,
 	return 0;
 }
 
+static int mlxsw_sp_setup_tc_block(struct mlxsw_sp_port *mlxsw_sp_port,
+				   struct flow_block_offload *f)
+{
+	switch (f->binder_type) {
+	case FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS:
+		return mlxsw_sp_setup_tc_block_clsact(mlxsw_sp_port, f, true);
+	case FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS:
+		return mlxsw_sp_setup_tc_block_clsact(mlxsw_sp_port, f, false);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static int mlxsw_sp_setup_tc(struct net_device *dev, enum tc_setup_type type,
 			     void *type_data)
 {
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 51047b1aa23a..ee9a19f28b97 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -767,8 +767,9 @@ mlxsw_sp_flow_block_is_mixed_bound(const struct mlxsw_sp_flow_block *block)
 struct mlxsw_sp_flow_block *mlxsw_sp_flow_block_create(struct mlxsw_sp *mlxsw_sp,
 						       struct net *net);
 void mlxsw_sp_flow_block_destroy(struct mlxsw_sp_flow_block *block);
-int mlxsw_sp_setup_tc_block(struct mlxsw_sp_port *mlxsw_sp_port,
-			    struct flow_block_offload *f);
+int mlxsw_sp_setup_tc_block_clsact(struct mlxsw_sp_port *mlxsw_sp_port,
+				   struct flow_block_offload *f,
+				   bool ingress);
 
 /* spectrum_acl.c */
 struct mlxsw_sp_acl_ruleset;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
index 421581a85cd6..0456cda33808 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c
@@ -277,18 +277,10 @@ static void mlxsw_sp_setup_tc_block_unbind(struct mlxsw_sp_port *mlxsw_sp_port,
 	}
 }
 
-int mlxsw_sp_setup_tc_block(struct mlxsw_sp_port *mlxsw_sp_port,
-			    struct flow_block_offload *f)
+int mlxsw_sp_setup_tc_block_clsact(struct mlxsw_sp_port *mlxsw_sp_port,
+				   struct flow_block_offload *f,
+				   bool ingress)
 {
-	bool ingress;
-
-	if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
-		ingress = true;
-	else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
-		ingress = false;
-	else
-		return -EOPNOTSUPP;
-
 	f->driver_block_list = &mlxsw_sp_block_cb_list;
 
 	switch (f->command) {
-- 
2.20.1

[PATCH net-next v2 12/13] mlxsw: spectrum_qdisc: Offload mirroring on RED qevent early_drop

[Petr Machata]

The RED qevents early_drop and mark can be offloaded under the following
fairly strict conditions:

- At most one filter is configured at the qevent block
- The protocol is "any"
- The classifier is matchall
- The action is trap, sample, or mirror with the same conditions as
  with other SPAN offloads
- The hw_counters type is none

In this patchset, implement offload of mirror for early_drop qevent.
The ECN trigger is currently not implemented in the FW and therefore
the mark qevent is not supported.

The qevent notifications look exactly like regular block binding
notifications with a binder type that identifies them as qevents.
Therefore the details of processing this binding are fairly similar
to the matchall offload.

struct flow_block_offload.sch points at the qdisc in question. Use it to
figure out if the qdisc is offloaded at all and what TC it configures.
Bounce bindings on not-offloaded qdiscs.

Individual bindings are kept in a list so that several qevents can share
the same block and all binding points get configured as the configured
filters change.

Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    |   2 +
 .../net/ethernet/mellanox/mlxsw/spectrum.h    |   2 +
 .../ethernet/mellanox/mlxsw/spectrum_qdisc.c  | 472 ++++++++++++++++++
 3 files changed, 476 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 2235c4bf330d..4ac634bd3571 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1337,6 +1337,8 @@ static int mlxsw_sp_setup_tc_block(struct mlxsw_sp_port *mlxsw_sp_port,
 		return mlxsw_sp_setup_tc_block_clsact(mlxsw_sp_port, f, true);
 	case FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS:
 		return mlxsw_sp_setup_tc_block_clsact(mlxsw_sp_port, f, false);
+	case FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP:
+		return mlxsw_sp_setup_tc_block_qevent_early_drop(mlxsw_sp_port, f);
 	default:
 		return -EOPNOTSUPP;
 	}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index ee9a19f28b97..c00811178637 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -1031,6 +1031,8 @@ int mlxsw_sp_setup_tc_tbf(struct mlxsw_sp_port *mlxsw_sp_port,
 			  struct tc_tbf_qopt_offload *p);
 int mlxsw_sp_setup_tc_fifo(struct mlxsw_sp_port *mlxsw_sp_port,
 			   struct tc_fifo_qopt_offload *p);
+int mlxsw_sp_setup_tc_block_qevent_early_drop(struct mlxsw_sp_port *mlxsw_sp_port,
+					      struct flow_block_offload *f);
 
 /* spectrum_fid.c */
 bool mlxsw_sp_fid_is_dummy(struct mlxsw_sp *mlxsw_sp, u16 fid_index);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
index 670a43fe2a00..901acd87353f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
@@ -8,6 +8,7 @@
 #include <net/red.h>
 
 #include "spectrum.h"
+#include "spectrum_span.h"
 #include "reg.h"
 
 #define MLXSW_SP_PRIO_BAND_TO_TCLASS(band) (IEEE_8021QAZ_MAX_TCS - band - 1)
@@ -1272,6 +1273,477 @@ int mlxsw_sp_setup_tc_ets(struct mlxsw_sp_port *mlxsw_sp_port,
 	}
 }
 
+struct mlxsw_sp_qevent_block {
+	struct list_head binding_list;
+	struct list_head mall_entry_list;
+	struct mlxsw_sp *mlxsw_sp;
+};
+
+struct mlxsw_sp_qevent_binding {
+	struct list_head list;
+	struct mlxsw_sp_port *mlxsw_sp_port;
+	u32 handle;
+	int tclass_num;
+	enum mlxsw_sp_span_trigger span_trigger;
+};
+
+static LIST_HEAD(mlxsw_sp_qevent_block_cb_list);
+
+static int mlxsw_sp_qevent_mirror_configure(struct mlxsw_sp *mlxsw_sp,
+					    struct mlxsw_sp_mall_entry *mall_entry,
+					    struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	struct mlxsw_sp_port *mlxsw_sp_port = qevent_binding->mlxsw_sp_port;
+	struct mlxsw_sp_span_trigger_parms trigger_parms = {};
+	int span_id;
+	int err;
+
+	err = mlxsw_sp_span_agent_get(mlxsw_sp, mall_entry->mirror.to_dev, &span_id);
+	if (err)
+		return err;
+
+	err = mlxsw_sp_span_analyzed_port_get(mlxsw_sp_port, true);
+	if (err)
+		goto err_analyzed_port_get;
+
+	trigger_parms.span_id = span_id;
+	err = mlxsw_sp_span_agent_bind(mlxsw_sp, qevent_binding->span_trigger, mlxsw_sp_port,
+				       &trigger_parms);
+	if (err)
+		goto err_agent_bind;
+
+	err = mlxsw_sp_span_trigger_enable(mlxsw_sp_port, qevent_binding->span_trigger,
+					   qevent_binding->tclass_num);
+	if (err)
+		goto err_trigger_enable;
+
+	mall_entry->mirror.span_id = span_id;
+	return 0;
+
+err_trigger_enable:
+	mlxsw_sp_span_agent_unbind(mlxsw_sp, qevent_binding->span_trigger, mlxsw_sp_port,
+				   &trigger_parms);
+err_agent_bind:
+	mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, true);
+err_analyzed_port_get:
+	mlxsw_sp_span_agent_put(mlxsw_sp, span_id);
+	return err;
+}
+
+static void mlxsw_sp_qevent_mirror_deconfigure(struct mlxsw_sp *mlxsw_sp,
+					       struct mlxsw_sp_mall_entry *mall_entry,
+					       struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	struct mlxsw_sp_port *mlxsw_sp_port = qevent_binding->mlxsw_sp_port;
+	struct mlxsw_sp_span_trigger_parms trigger_parms = {
+		.span_id = mall_entry->mirror.span_id,
+	};
+
+	mlxsw_sp_span_trigger_disable(mlxsw_sp_port, qevent_binding->span_trigger,
+				      qevent_binding->tclass_num);
+	mlxsw_sp_span_agent_unbind(mlxsw_sp, qevent_binding->span_trigger, mlxsw_sp_port,
+				   &trigger_parms);
+	mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, true);
+	mlxsw_sp_span_agent_put(mlxsw_sp, mall_entry->mirror.span_id);
+}
+
+static int mlxsw_sp_qevent_entry_configure(struct mlxsw_sp *mlxsw_sp,
+					   struct mlxsw_sp_mall_entry *mall_entry,
+					   struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	switch (mall_entry->type) {
+	case MLXSW_SP_MALL_ACTION_TYPE_MIRROR:
+		return mlxsw_sp_qevent_mirror_configure(mlxsw_sp, mall_entry, qevent_binding);
+	default:
+		/* This should have been validated away. */
+		WARN_ON(1);
+		return -EOPNOTSUPP;
+	}
+}
+
+static void mlxsw_sp_qevent_entry_deconfigure(struct mlxsw_sp *mlxsw_sp,
+					      struct mlxsw_sp_mall_entry *mall_entry,
+					      struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	switch (mall_entry->type) {
+	case MLXSW_SP_MALL_ACTION_TYPE_MIRROR:
+		return mlxsw_sp_qevent_mirror_deconfigure(mlxsw_sp, mall_entry, qevent_binding);
+	default:
+		WARN_ON(1);
+		return;
+	}
+}
+
+static int mlxsw_sp_qevent_binding_configure(struct mlxsw_sp_qevent_block *qevent_block,
+					     struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	struct mlxsw_sp_mall_entry *mall_entry;
+	int err;
+
+	list_for_each_entry(mall_entry, &qevent_block->mall_entry_list, list) {
+		err = mlxsw_sp_qevent_entry_configure(qevent_block->mlxsw_sp, mall_entry,
+						      qevent_binding);
+		if (err)
+			goto err_entry_configure;
+	}
+
+	return 0;
+
+err_entry_configure:
+	list_for_each_entry_continue_reverse(mall_entry, &qevent_block->mall_entry_list, list)
+		mlxsw_sp_qevent_entry_deconfigure(qevent_block->mlxsw_sp, mall_entry,
+						  qevent_binding);
+	return err;
+}
+
+static void mlxsw_sp_qevent_binding_deconfigure(struct mlxsw_sp_qevent_block *qevent_block,
+						struct mlxsw_sp_qevent_binding *qevent_binding)
+{
+	struct mlxsw_sp_mall_entry *mall_entry;
+
+	list_for_each_entry(mall_entry, &qevent_block->mall_entry_list, list)
+		mlxsw_sp_qevent_entry_deconfigure(qevent_block->mlxsw_sp, mall_entry,
+						  qevent_binding);
+}
+
+static int mlxsw_sp_qevent_block_configure(struct mlxsw_sp_qevent_block *qevent_block)
+{
+	struct mlxsw_sp_qevent_binding *qevent_binding;
+	int err;
+
+	list_for_each_entry(qevent_binding, &qevent_block->binding_list, list) {
+		err = mlxsw_sp_qevent_binding_configure(qevent_block, qevent_binding);
+		if (err)
+			goto err_binding_configure;
+	}
+
+	return 0;
+
+err_binding_configure:
+	list_for_each_entry_continue_reverse(qevent_binding, &qevent_block->binding_list, list)
+		mlxsw_sp_qevent_binding_deconfigure(qevent_block, qevent_binding);
+	return err;
+}
+
+static void mlxsw_sp_qevent_block_deconfigure(struct mlxsw_sp_qevent_block *qevent_block)
+{
+	struct mlxsw_sp_qevent_binding *qevent_binding;
+
+	list_for_each_entry(qevent_binding, &qevent_block->binding_list, list)
+		mlxsw_sp_qevent_binding_deconfigure(qevent_block, qevent_binding);
+}
+
+static struct mlxsw_sp_mall_entry *
+mlxsw_sp_qevent_mall_entry_find(struct mlxsw_sp_qevent_block *block, unsigned long cookie)
+{
+	struct mlxsw_sp_mall_entry *mall_entry;
+
+	list_for_each_entry(mall_entry, &block->mall_entry_list, list)
+		if (mall_entry->cookie == cookie)
+			return mall_entry;
+
+	return NULL;
+}
+
+static int mlxsw_sp_qevent_mall_replace(struct mlxsw_sp *mlxsw_sp,
+					struct mlxsw_sp_qevent_block *qevent_block,
+					struct tc_cls_matchall_offload *f)
+{
+	struct mlxsw_sp_mall_entry *mall_entry;
+	struct flow_action_entry *act;
+	int err;
+
+	/* It should not currently be possible to replace a matchall rule. So
+	 * this must be a new rule.
+	 */
+	if (!list_empty(&qevent_block->mall_entry_list)) {
+		NL_SET_ERR_MSG(f->common.extack, "At most one filter supported");
+		return -EOPNOTSUPP;
+	}
+	if (f->rule->action.num_entries != 1) {
+		NL_SET_ERR_MSG(f->common.extack, "Only singular actions supported");
+		return -EOPNOTSUPP;
+	}
+	if (f->common.chain_index) {
+		NL_SET_ERR_MSG(f->common.extack, "Only chain 0 is supported");
+		return -EOPNOTSUPP;
+	}
+	if (f->common.protocol != htons(ETH_P_ALL)) {
+		NL_SET_ERR_MSG(f->common.extack, "Protocol matching not supported");
+		return -EOPNOTSUPP;
+	}
+
+	act = &f->rule->action.entries[0];
+	if (!(act->hw_stats & FLOW_ACTION_HW_STATS_DISABLED)) {
+		NL_SET_ERR_MSG(f->common.extack, "HW counters not supported on qevents");
+		return -EOPNOTSUPP;
+	}
+
+	mall_entry = kzalloc(sizeof(*mall_entry), GFP_KERNEL);
+	if (!mall_entry)
+		return -ENOMEM;
+	mall_entry->cookie = f->cookie;
+
+	if (act->id == FLOW_ACTION_MIRRED) {
+		mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
+		mall_entry->mirror.to_dev = act->dev;
+	} else {
+		NL_SET_ERR_MSG(f->common.extack, "Unsupported action");
+		err = -EOPNOTSUPP;
+		goto err_unsupported_action;
+	}
+
+	list_add_tail(&mall_entry->list, &qevent_block->mall_entry_list);
+
+	err = mlxsw_sp_qevent_block_configure(qevent_block);
+	if (err)
+		goto err_block_configure;
+
+	return 0;
+
+err_block_configure:
+	list_del(&mall_entry->list);
+err_unsupported_action:
+	kfree(mall_entry);
+	return err;
+}
+
+static void mlxsw_sp_qevent_mall_destroy(struct mlxsw_sp_qevent_block *qevent_block,
+					 struct tc_cls_matchall_offload *f)
+{
+	struct mlxsw_sp_mall_entry *mall_entry;
+
+	mall_entry = mlxsw_sp_qevent_mall_entry_find(qevent_block, f->cookie);
+	if (!mall_entry)
+		return;
+
+	mlxsw_sp_qevent_block_deconfigure(qevent_block);
+
+	list_del(&mall_entry->list);
+	kfree(mall_entry);
+}
+
+static int mlxsw_sp_qevent_block_mall_cb(struct mlxsw_sp_qevent_block *qevent_block,
+					 struct tc_cls_matchall_offload *f)
+{
+	struct mlxsw_sp *mlxsw_sp = qevent_block->mlxsw_sp;
+
+	switch (f->command) {
+	case TC_CLSMATCHALL_REPLACE:
+		return mlxsw_sp_qevent_mall_replace(mlxsw_sp, qevent_block, f);
+	case TC_CLSMATCHALL_DESTROY:
+		mlxsw_sp_qevent_mall_destroy(qevent_block, f);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int mlxsw_sp_qevent_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
+{
+	struct mlxsw_sp_qevent_block *qevent_block = cb_priv;
+
+	switch (type) {
+	case TC_SETUP_CLSMATCHALL:
+		return mlxsw_sp_qevent_block_mall_cb(qevent_block, type_data);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static struct mlxsw_sp_qevent_block *mlxsw_sp_qevent_block_create(struct mlxsw_sp *mlxsw_sp,
+								  struct net *net)
+{
+	struct mlxsw_sp_qevent_block *qevent_block;
+
+	qevent_block = kzalloc(sizeof(*qevent_block), GFP_KERNEL);
+	if (!qevent_block)
+		return NULL;
+
+	INIT_LIST_HEAD(&qevent_block->binding_list);
+	INIT_LIST_HEAD(&qevent_block->mall_entry_list);
+	qevent_block->mlxsw_sp = mlxsw_sp;
+	return qevent_block;
+}
+
+static void
+mlxsw_sp_qevent_block_destroy(struct mlxsw_sp_qevent_block *qevent_block)
+{
+	WARN_ON(!list_empty(&qevent_block->binding_list));
+	WARN_ON(!list_empty(&qevent_block->mall_entry_list));
+	kfree(qevent_block);
+}
+
+static void mlxsw_sp_qevent_block_release(void *cb_priv)
+{
+	struct mlxsw_sp_qevent_block *qevent_block = cb_priv;
+
+	mlxsw_sp_qevent_block_destroy(qevent_block);
+}
+
+static struct mlxsw_sp_qevent_binding *
+mlxsw_sp_qevent_binding_create(struct mlxsw_sp_port *mlxsw_sp_port, u32 handle, int tclass_num,
+			       enum mlxsw_sp_span_trigger span_trigger)
+{
+	struct mlxsw_sp_qevent_binding *binding;
+
+	binding = kzalloc(sizeof(*binding), GFP_KERNEL);
+	if (!binding)
+		return ERR_PTR(-ENOMEM);
+
+	binding->mlxsw_sp_port = mlxsw_sp_port;
+	binding->handle = handle;
+	binding->tclass_num = tclass_num;
+	binding->span_trigger = span_trigger;
+	return binding;
+}
+
+static void
+mlxsw_sp_qevent_binding_destroy(struct mlxsw_sp_qevent_binding *binding)
+{
+	kfree(binding);
+}
+
+static struct mlxsw_sp_qevent_binding *
+mlxsw_sp_qevent_binding_lookup(struct mlxsw_sp_qevent_block *block,
+			       struct mlxsw_sp_port *mlxsw_sp_port,
+			       u32 handle,
+			       enum mlxsw_sp_span_trigger span_trigger)
+{
+	struct mlxsw_sp_qevent_binding *qevent_binding;
+
+	list_for_each_entry(qevent_binding, &block->binding_list, list)
+		if (qevent_binding->mlxsw_sp_port == mlxsw_sp_port &&
+		    qevent_binding->handle == handle &&
+		    qevent_binding->span_trigger == span_trigger)
+			return qevent_binding;
+	return NULL;
+}
+
+static int mlxsw_sp_setup_tc_block_qevent_bind(struct mlxsw_sp_port *mlxsw_sp_port,
+					       struct flow_block_offload *f,
+					       enum mlxsw_sp_span_trigger span_trigger)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_qevent_binding *qevent_binding;
+	struct mlxsw_sp_qevent_block *qevent_block;
+	struct flow_block_cb *block_cb;
+	struct mlxsw_sp_qdisc *qdisc;
+	bool register_block = false;
+	int err;
+
+	block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_qevent_block_cb, mlxsw_sp);
+	if (!block_cb) {
+		qevent_block = mlxsw_sp_qevent_block_create(mlxsw_sp, f->net);
+		if (!qevent_block)
+			return -ENOMEM;
+		block_cb = flow_block_cb_alloc(mlxsw_sp_qevent_block_cb, mlxsw_sp, qevent_block,
+					       mlxsw_sp_qevent_block_release);
+		if (IS_ERR(block_cb)) {
+			mlxsw_sp_qevent_block_destroy(qevent_block);
+			return PTR_ERR(block_cb);
+		}
+		register_block = true;
+	} else {
+		qevent_block = flow_block_cb_priv(block_cb);
+	}
+	flow_block_cb_incref(block_cb);
+
+	qdisc = mlxsw_sp_qdisc_find_by_handle(mlxsw_sp_port, f->sch->handle);
+	if (!qdisc) {
+		NL_SET_ERR_MSG(f->extack, "Qdisc not offloaded");
+		err = -ENOENT;
+		goto err_find_qdisc;
+	}
+
+	if (WARN_ON(mlxsw_sp_qevent_binding_lookup(qevent_block, mlxsw_sp_port, f->sch->handle,
+						   span_trigger))) {
+		err = -EEXIST;
+		goto err_binding_exists;
+	}
+
+	qevent_binding = mlxsw_sp_qevent_binding_create(mlxsw_sp_port, f->sch->handle,
+							qdisc->tclass_num, span_trigger);
+	if (IS_ERR(qevent_binding)) {
+		err = PTR_ERR(qevent_binding);
+		goto err_binding_create;
+	}
+
+	err = mlxsw_sp_qevent_binding_configure(qevent_block, qevent_binding);
+	if (err)
+		goto err_binding_configure;
+
+	list_add(&qevent_binding->list, &qevent_block->binding_list);
+
+	if (register_block) {
+		flow_block_cb_add(block_cb, f);
+		list_add_tail(&block_cb->driver_list, &mlxsw_sp_qevent_block_cb_list);
+	}
+
+	return 0;
+
+err_binding_configure:
+	mlxsw_sp_qevent_binding_destroy(qevent_binding);
+err_binding_create:
+err_binding_exists:
+err_find_qdisc:
+	if (!flow_block_cb_decref(block_cb))
+		flow_block_cb_free(block_cb);
+	return err;
+}
+
+static void mlxsw_sp_setup_tc_block_qevent_unbind(struct mlxsw_sp_port *mlxsw_sp_port,
+						  struct flow_block_offload *f,
+						  enum mlxsw_sp_span_trigger span_trigger)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_qevent_binding *qevent_binding;
+	struct mlxsw_sp_qevent_block *qevent_block;
+	struct flow_block_cb *block_cb;
+
+	block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_qevent_block_cb, mlxsw_sp);
+	if (!block_cb)
+		return;
+	qevent_block = flow_block_cb_priv(block_cb);
+
+	qevent_binding = mlxsw_sp_qevent_binding_lookup(qevent_block, mlxsw_sp_port, f->sch->handle,
+							span_trigger);
+	if (!qevent_binding)
+		return;
+
+	list_del(&qevent_binding->list);
+	mlxsw_sp_qevent_binding_deconfigure(qevent_block, qevent_binding);
+	mlxsw_sp_qevent_binding_destroy(qevent_binding);
+
+	if (!flow_block_cb_decref(block_cb)) {
+		flow_block_cb_remove(block_cb, f);
+		list_del(&block_cb->driver_list);
+	}
+}
+
+static int mlxsw_sp_setup_tc_block_qevent(struct mlxsw_sp_port *mlxsw_sp_port,
+					  struct flow_block_offload *f,
+					  enum mlxsw_sp_span_trigger span_trigger)
+{
+	f->driver_block_list = &mlxsw_sp_qevent_block_cb_list;
+
+	switch (f->command) {
+	case FLOW_BLOCK_BIND:
+		return mlxsw_sp_setup_tc_block_qevent_bind(mlxsw_sp_port, f, span_trigger);
+	case FLOW_BLOCK_UNBIND:
+		mlxsw_sp_setup_tc_block_qevent_unbind(mlxsw_sp_port, f, span_trigger);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+int mlxsw_sp_setup_tc_block_qevent_early_drop(struct mlxsw_sp_port *mlxsw_sp_port,
+					      struct flow_block_offload *f)
+{
+	return mlxsw_sp_setup_tc_block_qevent(mlxsw_sp_port, f, MLXSW_SP_SPAN_TRIGGER_EARLY_DROP);
+}
+
 int mlxsw_sp_tc_qdisc_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	struct mlxsw_sp_qdisc_state *qdisc_state;
-- 
2.20.1

[PATCH net-next v2 13/13] selftests: mlxsw: RED: Test offload of mirror on RED early_drop qevent

[Petr Machata]

Add a selftest for offloading a mirror action attached to the block
associated with RED early_drop qevent.

Signed-off-by: Petr Machata <petrm@mellanox.com>
---
 .../drivers/net/mlxsw/sch_red_core.sh         | 106 +++++++++++++++++-
 .../drivers/net/mlxsw/sch_red_ets.sh          |  11 ++
 .../drivers/net/mlxsw/sch_red_root.sh         |   8 ++
 3 files changed, 122 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
index 0d347d48c112..45042105ead7 100644
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
@@ -121,6 +121,7 @@ h1_destroy()
 h2_create()
 {
 	host_create $h2 2
+	tc qdisc add dev $h2 clsact
 
 	# Some of the tests in this suite use multicast traffic. As this traffic
 	# enters BR2_10 resp. BR2_11, it is flooded to all other ports. Thus
@@ -141,6 +142,7 @@ h2_create()
 h2_destroy()
 {
 	ethtool -s $h2 autoneg on
+	tc qdisc del dev $h2 clsact
 	host_destroy $h2
 }
 
@@ -336,6 +338,17 @@ get_qdisc_npackets()
 		qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .packets
 }
 
+send_packets()
+{
+	local vlan=$1; shift
+	local proto=$1; shift
+	local pkts=$1; shift
+
+	$MZ $h2.$vlan -p 8000 -a own -b $h3_mac \
+	    -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \
+	    -t $proto -q -c $pkts "$@"
+}
+
 # This sends traffic in an attempt to build a backlog of $size. Returns 0 on
 # success. After 10 failed attempts it bails out and returns 1. It dumps the
 # backlog size to stdout.
@@ -364,9 +377,7 @@ build_backlog()
 			return 1
 		fi
 
-		$MZ $h2.$vlan -p 8000 -a own -b $h3_mac \
-		    -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \
-		    -t $proto -q -c $pkts "$@"
+		send_packets $vlan $proto $pkts "$@"
 	done
 }
 
@@ -531,3 +542,92 @@ do_mc_backlog_test()
 
 	log_test "TC $((vlan - 10)): Qdisc reports MC backlog"
 }
+
+do_drop_test()
+{
+	local vlan=$1; shift
+	local limit=$1; shift
+	local trigger=$1; shift
+	local subtest=$1; shift
+	local fetch_counter=$1; shift
+	local backlog
+	local base
+	local now
+	local pct
+
+	RET=0
+
+	start_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) $h3_mac
+
+	# Create a bit of a backlog and observe no mirroring due to drops.
+	qevent_rule_install_$subtest
+	base=$($fetch_counter)
+
+	build_backlog $vlan $((2 * limit / 3)) udp >/dev/null
+
+	busywait 1100 until_counter_is ">= $((base + 1))" $fetch_counter >/dev/null
+	check_fail $? "Spurious packets observed without buffer pressure"
+
+	qevent_rule_uninstall_$subtest
+
+	# Push to the queue until it's at the limit. The configured limit is
+	# rounded by the qdisc and then by the driver, so this is the best we
+	# can do to get to the real limit of the system. Do this with the rules
+	# uninstalled so that the inevitable drops don't get counted.
+	build_backlog $vlan $((3 * limit / 2)) udp >/dev/null
+
+	qevent_rule_install_$subtest
+	base=$($fetch_counter)
+
+	send_packets $vlan udp 11
+
+	now=$(busywait 1100 until_counter_is ">= $((base + 10))" $fetch_counter)
+	check_err $? "Dropped packets not observed: 11 expected, $((now - base)) seen"
+
+	# When no extra traffic is injected, there should be no mirroring.
+	busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null
+	check_fail $? "Spurious packets observed"
+
+	# When the rule is uninstalled, there should be no mirroring.
+	qevent_rule_uninstall_$subtest
+	send_packets $vlan udp 11
+	busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null
+	check_fail $? "Spurious packets observed after uninstall"
+
+	log_test "TC $((vlan - 10)): ${trigger}ped packets $subtest'd"
+
+	stop_traffic
+	sleep 1
+}
+
+qevent_rule_install_mirror()
+{
+	tc filter add block 10 pref 1234 handle 102 matchall skip_sw \
+	   action mirred egress mirror dev $swp2 hw_stats disabled
+}
+
+qevent_rule_uninstall_mirror()
+{
+	tc filter del block 10 pref 1234 handle 102 matchall
+}
+
+qevent_counter_fetch_mirror()
+{
+	tc_rule_handle_stats_get "dev $h2 ingress" 101
+}
+
+do_drop_mirror_test()
+{
+	local vlan=$1; shift
+	local limit=$1; shift
+	local qevent_name=$1; shift
+
+	tc filter add dev $h2 ingress pref 1 handle 101 prot ip \
+	   flower skip_sw ip_proto udp \
+	   action drop
+
+	do_drop_test "$vlan" "$limit" "$qevent_name" mirror \
+		     qevent_counter_fetch_mirror
+
+	tc filter del dev $h2 ingress pref 1 handle 101 flower
+}
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
index 1c36c576613b..c8968b041bea 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
@@ -7,6 +7,7 @@ ALL_TESTS="
 	ecn_nodrop_test
 	red_test
 	mc_backlog_test
+	red_mirror_test
 "
 : ${QDISC:=ets}
 source sch_red_core.sh
@@ -83,6 +84,16 @@ mc_backlog_test()
 	uninstall_qdisc
 }
 
+red_mirror_test()
+{
+	install_qdisc qevent early_drop block 10
+
+	do_drop_mirror_test 10 $BACKLOG1 early_drop
+	do_drop_mirror_test 11 $BACKLOG2 early_drop
+
+	uninstall_qdisc
+}
+
 trap cleanup EXIT
 
 setup_prepare
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
index 558667ea11ec..ede9c38d3eff 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
@@ -7,6 +7,7 @@ ALL_TESTS="
 	ecn_nodrop_test
 	red_test
 	mc_backlog_test
+	red_mirror_test
 "
 source sch_red_core.sh
 
@@ -57,6 +58,13 @@ mc_backlog_test()
 	uninstall_qdisc
 }
 
+red_mirror_test()
+{
+	install_qdisc qevent early_drop block 10
+	do_drop_mirror_test 10 $BACKLOG
+	uninstall_qdisc
+}
+
 trap cleanup EXIT
 
 setup_prepare
-- 
2.20.1

Re: [PATCH net-next v2 01/13] net: sched: Pass qdisc reference in struct flow_block_offload

[Jakub Kicinski]

On Sat, 11 Jul 2020 00:55:03 +0300 Petr Machata wrote:
> diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
> index 0a9a4467d7c7..e82e5cf64d61 100644
> --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
> +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
> @@ -1888,7 +1888,7 @@ static void bnxt_tc_setup_indr_rel(void *cb_priv)
>  	kfree(priv);
>  }
>  
> -static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
> +static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct Qdisc *sch, struct bnxt *bp,
>  				    struct flow_block_offload *f, void *data,
>  				    void (*cleanup)(struct flow_block_cb *block_cb))
>  {
> @@ -1911,7 +1911,7 @@ static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
>  		block_cb = flow_indr_block_cb_alloc(bnxt_tc_setup_indr_block_cb,
>  						    cb_priv, cb_priv,
>  						    bnxt_tc_setup_indr_rel, f,
> -						    netdev, data, bp, cleanup);
> +						    netdev, sch, data, bp, cleanup);

nit: the number of arguments is getting out of hand here, perhaps it's
     time to pass a structure in.

>  		if (IS_ERR(block_cb)) {
>  			list_del(&cb_priv->list);
>  			kfree(cb_priv);
> @@ -1946,7 +1946,7 @@ static bool bnxt_is_netdev_indr_offload(struct net_device *netdev)
>  	return netif_is_vxlan(netdev);
>  }
>  
> -static int bnxt_tc_setup_indr_cb(struct net_device *netdev, void *cb_priv,
> +static int bnxt_tc_setup_indr_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
>  				 enum tc_setup_type type, void *type_data,
>  				 void *data,
>  				 void (*cleanup)(struct flow_block_cb *block_cb))
> @@ -1956,8 +1956,7 @@ static int bnxt_tc_setup_indr_cb(struct net_device *netdev, void *cb_priv,
>  
>  	switch (type) {
>  	case TC_SETUP_BLOCK:
> -		return bnxt_tc_setup_indr_block(netdev, cb_priv, type_data, data,
> -						cleanup);
> +		return bnxt_tc_setup_indr_block(netdev, sch, cb_priv, type_data, data, cleanup);
>  	default:
>  		break;
>  	}

Re: [PATCH net-next v2 01/13] net: sched: Pass qdisc reference in struct flow_block_offload

[Petr Machata]

Jakub Kicinski <kuba@kernel.org> writes:

> On Sat, 11 Jul 2020 00:55:03 +0300 Petr Machata wrote:
>> diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
>> index 0a9a4467d7c7..e82e5cf64d61 100644
>> --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
>> +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c

>> @@ -1911,7 +1911,7 @@ static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
>>  		block_cb = flow_indr_block_cb_alloc(bnxt_tc_setup_indr_block_cb,
>>  						    cb_priv, cb_priv,
>>  						    bnxt_tc_setup_indr_rel, f,
>> -						    netdev, data, bp, cleanup);
>> +						    netdev, sch, data, bp, cleanup);
>
> nit: the number of arguments is getting out of hand here, perhaps it's
>      time to pass a structure in.

I would say that adding a distinctly-typed and distinctly-named argument
does not make the other arguments less clear, or increase the risk of
mixing them up in a way that the compiler would not catch.

Taken from another angle, the argument list is not passed through layers
of other functions, so the structure would be assembled in
bnxt_tc_setup_indr_block() and then unpacked again in
flow_indr_block_cb_alloc(). Nothing is saved in that regard either.

Also, flow_indr_block_cb_alloc() is a simple function. When a structure
needs to be introduced to carry the arguments, it might be more
straightforward to just open-code it.

>>  		if (IS_ERR(block_cb)) {
>>  			list_del(&cb_priv->list);
>>  			kfree(cb_priv);

Re: [PATCH net-next v2 00/13] mlxsw: Add support for buffer drops mirroring

[David Miller]

From: Petr Machata <petrm@mellanox.com>
Date: Sat, 11 Jul 2020 00:55:02 +0300

> This set offloads the recently introduced qevent infrastructure in TC and
> allows mlxsw to support mirroring of packets that were dropped due to
> buffer related reasons (e.g., early drops) during forwarding.
 ...

Series applied, thanks.