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Message-Id: <1502869064-25842-2-git-send-email-simon.horman@netronome.com>
Date: Wed, 16 Aug 2017 09:37:43 +0200
From: Simon Horman <simon.horman@...ronome.com>
To: David Miller <davem@...emloft.net>,
Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc: netdev@...r.kernel.org, oss-drivers@...ronome.com,
Simon Horman <simon.horman@...ronome.com>
Subject: [PATCH net-next 1/2] nfp: process control messages in workqueue in flower app
Processing of control messages is not time-critical and future processing
of some messages will require taking the RTNL which is not possible
in a BH handler. It seems simplest to move all control message processing
to a workqueue.
Signed-off-by: Simon Horman <simon.horman@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
drivers/net/ethernet/netronome/nfp/flower/cmsg.c | 24 +++++++++++++++++++++++-
drivers/net/ethernet/netronome/nfp/flower/cmsg.h | 1 +
drivers/net/ethernet/netronome/nfp/flower/main.c | 14 ++++++++++++--
drivers/net/ethernet/netronome/nfp/flower/main.h | 5 +++++
4 files changed, 41 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
index aa46b23cdfb1..6c8c22491fe7 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
@@ -34,10 +34,12 @@
#include <linux/bitfield.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/workqueue.h>
#include <net/dst_metadata.h>
#include "main.h"
#include "../nfpcore/nfp_cpp.h"
+#include "../nfp_net.h"
#include "../nfp_net_repr.h"
#include "./cmsg.h"
@@ -155,7 +157,8 @@ nfp_flower_cmsg_portmod_rx(struct nfp_app *app, struct sk_buff *skb)
rcu_read_unlock();
}
-void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb)
+static void
+nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb)
{
struct nfp_flower_cmsg_hdr *cmsg_hdr;
enum nfp_flower_cmsg_type_port type;
@@ -184,3 +187,22 @@ void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb)
out:
dev_kfree_skb_any(skb);
}
+
+void nfp_flower_cmsg_process_rx(struct work_struct *work)
+{
+ struct nfp_flower_priv *priv;
+ struct sk_buff *skb;
+
+ priv = container_of(work, struct nfp_flower_priv, cmsg_work);
+
+ while ((skb = skb_dequeue(&priv->cmsg_skbs)))
+ nfp_flower_cmsg_process_one_rx(priv->nn->app, skb);
+}
+
+void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb)
+{
+ struct nfp_flower_priv *priv = app->priv;
+
+ skb_queue_tail(&priv->cmsg_skbs, skb);
+ schedule_work(&priv->cmsg_work);
+}
diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
index aa92a8711a02..a2ec60344236 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
+++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
@@ -330,6 +330,7 @@ nfp_flower_cmsg_mac_repr_add(struct sk_buff *skb, unsigned int idx,
unsigned int nbi, unsigned int nbi_port,
unsigned int phys_port);
int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok);
+void nfp_flower_cmsg_process_rx(struct work_struct *work);
void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb);
struct sk_buff *
nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size,
diff --git a/drivers/net/ethernet/netronome/nfp/flower/main.c b/drivers/net/ethernet/netronome/nfp/flower/main.c
index b905454b30ca..3088e959f2a3 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/main.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/main.c
@@ -332,6 +332,7 @@ static int nfp_flower_vnic_init(struct nfp_app *app, struct nfp_net *nn,
static int nfp_flower_init(struct nfp_app *app)
{
const struct nfp_pf *pf = app->pf;
+ struct nfp_flower_priv *app_priv;
u64 version;
int err;
@@ -362,10 +363,14 @@ static int nfp_flower_init(struct nfp_app *app)
return -EINVAL;
}
- app->priv = vzalloc(sizeof(struct nfp_flower_priv));
- if (!app->priv)
+ app_priv = vzalloc(sizeof(struct nfp_flower_priv));
+ if (!app_priv)
return -ENOMEM;
+ app->priv = app_priv;
+ skb_queue_head_init(&app_priv->cmsg_skbs);
+ INIT_WORK(&app_priv->cmsg_work, nfp_flower_cmsg_process_rx);
+
err = nfp_flower_metadata_init(app);
if (err)
goto err_free_app_priv;
@@ -379,6 +384,11 @@ static int nfp_flower_init(struct nfp_app *app)
static void nfp_flower_clean(struct nfp_app *app)
{
+ struct nfp_flower_priv *app_priv = app->priv;
+
+ skb_queue_purge(&app_priv->cmsg_skbs);
+ flush_work(&app_priv->cmsg_work);
+
nfp_flower_metadata_cleanup(app);
vfree(app->priv);
app->priv = NULL;
diff --git a/drivers/net/ethernet/netronome/nfp/flower/main.h b/drivers/net/ethernet/netronome/nfp/flower/main.h
index 71e4f4f4e9ba..b7043ca9b9fc 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/main.h
+++ b/drivers/net/ethernet/netronome/nfp/flower/main.h
@@ -39,6 +39,7 @@
#include <linux/time64.h>
#include <linux/types.h>
#include <net/pkt_cls.h>
+#include <linux/workqueue.h>
struct net_device;
struct nfp_app;
@@ -78,6 +79,8 @@ struct nfp_fl_stats_id {
* @mask_ids: List of free mask ids
* @mask_table: Hash table used to store masks
* @flow_table: Hash table used to store flower rules
+ * @cmsg_work: Workqueue for control messages processing
+ * @cmsg_skbs: List of skbs for control message processing
*/
struct nfp_flower_priv {
struct nfp_net *nn;
@@ -87,6 +90,8 @@ struct nfp_flower_priv {
struct nfp_fl_mask_id mask_ids;
DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS);
DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS);
+ struct work_struct cmsg_work;
+ struct sk_buff_head cmsg_skbs;
};
struct nfp_fl_key_ls {
--
2.1.4
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