From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 31 May 2017 08:06:50 -0700
Subject: nfp: move basic eBPF stats to app-specific code
Patch-mainline: v4.13-rc1
Git-commit: c66a9cf408037781fc1984bc60785049b453d8a4
References: bsc#1055968
Allow apps to associate private data with vNICs and move
BPF-specific fields of nfp_net to such structure.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/netronome/nfp/bpf/main.c | 19 +++++++-
drivers/net/ethernet/netronome/nfp/bpf/main.h | 18 +++++++
drivers/net/ethernet/netronome/nfp/bpf/offload.c | 46 ++++++++++++--------
drivers/net/ethernet/netronome/nfp/nfp_net.h | 15 +-----
drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 3 -
5 files changed, 67 insertions(+), 34 deletions(-)
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -86,6 +86,9 @@ static const char *nfp_bpf_extra_cap(str
static int
nfp_bpf_vnic_init(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
{
+ struct nfp_net_bpf_priv *priv;
+ int ret;
+
/* Limit to single port, otherwise it's just a NIC */
if (id > 0) {
nfp_warn(app->cpp,
@@ -94,13 +97,27 @@ nfp_bpf_vnic_init(struct nfp_app *app, s
return PTR_ERR_OR_ZERO(nn->port);
}
- return nfp_app_nic_vnic_init(app, nn, id);
+ priv = kmalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ nn->app_priv = priv;
+ spin_lock_init(&priv->rx_filter_lock);
+ setup_timer(&priv->rx_filter_stats_timer,
+ nfp_net_filter_stats_timer, (unsigned long)nn);
+
+ ret = nfp_app_nic_vnic_init(app, nn, id);
+ if (ret)
+ kfree(priv);
+
+ return ret;
}
static void nfp_bpf_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
{
if (nn->dp.bpf_offload_xdp)
nfp_bpf_xdp_offload(app, nn, NULL);
+ kfree(nn->app_priv);
}
static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -39,6 +39,8 @@
#include <linux/list.h>
#include <linux/types.h>
+#include "../nfp_net.h"
+
/* For branch fixup logic use up-most byte of branch instruction as scratch
* area. Remember to clear this before sending instructions to HW!
*/
@@ -201,6 +203,22 @@ int nfp_prog_verify(struct nfp_prog *nfp
struct nfp_net;
struct tc_cls_bpf_offload;
+/**
+ * struct nfp_net_bpf_priv - per-vNIC BPF private data
+ * @rx_filter: Filter offload statistics - dropped packets/bytes
+ * @rx_filter_prev: Filter offload statistics - values from previous update
+ * @rx_filter_change: Jiffies when statistics last changed
+ * @rx_filter_stats_timer: Timer for polling filter offload statistics
+ * @rx_filter_lock: Lock protecting timer state changes (teardown)
+ */
+struct nfp_net_bpf_priv {
+ struct nfp_stat_pair rx_filter, rx_filter_prev;
+ unsigned long rx_filter_change;
+ struct timer_list rx_filter_stats_timer;
+ spinlock_t rx_filter_lock;
+};
+
int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf);
+void nfp_net_filter_stats_timer(unsigned long data);
#endif
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -54,46 +54,52 @@
void nfp_net_filter_stats_timer(unsigned long data)
{
struct nfp_net *nn = (void *)data;
+ struct nfp_net_bpf_priv *priv;
struct nfp_stat_pair latest;
- spin_lock_bh(&nn->rx_filter_lock);
+ priv = nn->app_priv;
+
+ spin_lock_bh(&priv->rx_filter_lock);
if (nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF)
- mod_timer(&nn->rx_filter_stats_timer,
+ mod_timer(&priv->rx_filter_stats_timer,
jiffies + NFP_NET_STAT_POLL_IVL);
- spin_unlock_bh(&nn->rx_filter_lock);
+ spin_unlock_bh(&priv->rx_filter_lock);
latest.pkts = nn_readq(nn, NFP_NET_CFG_STATS_APP1_FRAMES);
latest.bytes = nn_readq(nn, NFP_NET_CFG_STATS_APP1_BYTES);
- if (latest.pkts != nn->rx_filter.pkts)
- nn->rx_filter_change = jiffies;
+ if (latest.pkts != priv->rx_filter.pkts)
+ priv->rx_filter_change = jiffies;
- nn->rx_filter = latest;
+ priv->rx_filter = latest;
}
static void nfp_net_bpf_stats_reset(struct nfp_net *nn)
{
- nn->rx_filter.pkts = nn_readq(nn, NFP_NET_CFG_STATS_APP1_FRAMES);
- nn->rx_filter.bytes = nn_readq(nn, NFP_NET_CFG_STATS_APP1_BYTES);
- nn->rx_filter_prev = nn->rx_filter;
- nn->rx_filter_change = jiffies;
+ struct nfp_net_bpf_priv *priv = nn->app_priv;
+
+ priv->rx_filter.pkts = nn_readq(nn, NFP_NET_CFG_STATS_APP1_FRAMES);
+ priv->rx_filter.bytes = nn_readq(nn, NFP_NET_CFG_STATS_APP1_BYTES);
+ priv->rx_filter_prev = priv->rx_filter;
+ priv->rx_filter_change = jiffies;
}
static int
nfp_net_bpf_stats_update(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
{
+ struct nfp_net_bpf_priv *priv = nn->app_priv;
u64 bytes, pkts;
- pkts = nn->rx_filter.pkts - nn->rx_filter_prev.pkts;
- bytes = nn->rx_filter.bytes - nn->rx_filter_prev.bytes;
+ pkts = priv->rx_filter.pkts - priv->rx_filter_prev.pkts;
+ bytes = priv->rx_filter.bytes - priv->rx_filter_prev.bytes;
bytes -= pkts * ETH_HLEN;
- nn->rx_filter_prev = nn->rx_filter;
+ priv->rx_filter_prev = priv->rx_filter;
tcf_exts_stats_update(cls_bpf->exts,
- bytes, pkts, nn->rx_filter_change);
+ bytes, pkts, priv->rx_filter_change);
return 0;
}
@@ -183,6 +189,7 @@ nfp_net_bpf_load_and_start(struct nfp_ne
unsigned int code_sz, unsigned int n_instr,
bool dense_mode)
{
+ struct nfp_net_bpf_priv *priv = nn->app_priv;
u64 bpf_addr = dma_addr;
int err;
@@ -209,20 +216,23 @@ nfp_net_bpf_load_and_start(struct nfp_ne
dma_free_coherent(nn->dp.dev, code_sz, code, dma_addr);
nfp_net_bpf_stats_reset(nn);
- mod_timer(&nn->rx_filter_stats_timer, jiffies + NFP_NET_STAT_POLL_IVL);
+ mod_timer(&priv->rx_filter_stats_timer,
+ jiffies + NFP_NET_STAT_POLL_IVL);
}
static int nfp_net_bpf_stop(struct nfp_net *nn)
{
+ struct nfp_net_bpf_priv *priv = nn->app_priv;
+
if (!(nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF))
return 0;
- spin_lock_bh(&nn->rx_filter_lock);
+ spin_lock_bh(&priv->rx_filter_lock);
nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_BPF;
- spin_unlock_bh(&nn->rx_filter_lock);
+ spin_unlock_bh(&priv->rx_filter_lock);
nn_writel(nn, NFP_NET_CFG_CTRL, nn->dp.ctrl);
- del_timer_sync(&nn->rx_filter_stats_timer);
+ del_timer_sync(&priv->rx_filter_stats_timer);
nn->dp.bpf_offload_skip_sw = 0;
return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
--- a/drivers/net/ethernet/netronome/nfp/nfp_net.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h
@@ -517,11 +517,6 @@ struct nfp_net_dp {
* @rss_cfg: RSS configuration
* @rss_key: RSS secret key
* @rss_itbl: RSS indirection table
- * @rx_filter: Filter offload statistics - dropped packets/bytes
- * @rx_filter_prev: Filter offload statistics - values from previous update
- * @rx_filter_change: Jiffies when statistics last changed
- * @rx_filter_stats_timer: Timer for polling filter offload statistics
- * @rx_filter_lock: Lock protecting timer state changes (teardown)
* @max_r_vecs: Number of allocated interrupt vectors for RX/TX
* @max_tx_rings: Maximum number of TX rings supported by the Firmware
* @max_rx_rings: Maximum number of RX rings supported by the Firmware
@@ -556,6 +551,7 @@ struct nfp_net_dp {
* @pdev: Backpointer to PCI device
* @app: APP handle if available
* @port: Pointer to nfp_port structure if vNIC is a port
+ * @app_priv: APP private data for this vNIC
*/
struct nfp_net {
struct nfp_net_dp dp;
@@ -570,11 +566,6 @@ struct nfp_net {
u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];
u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];
- struct nfp_stat_pair rx_filter, rx_filter_prev;
- unsigned long rx_filter_change;
- struct timer_list rx_filter_stats_timer;
- spinlock_t rx_filter_lock;
-
unsigned int max_tx_rings;
unsigned int max_rx_rings;
@@ -627,6 +618,8 @@ struct nfp_net {
struct nfp_app *app;
struct nfp_port *port;
+
+ void *app_priv;
};
/* Functions to read/write from/to a BAR
@@ -867,6 +860,4 @@ static inline void nfp_net_debugfs_dir_c
}
#endif /* CONFIG_NFP_DEBUG */
-void nfp_net_filter_stats_timer(unsigned long data);
-
#endif /* _NFP_NET_H_ */
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3071,13 +3071,10 @@ struct nfp_net *nfp_net_alloc(struct pci
nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
spin_lock_init(&nn->reconfig_lock);
- spin_lock_init(&nn->rx_filter_lock);
spin_lock_init(&nn->link_status_lock);
setup_timer(&nn->reconfig_timer,
nfp_net_reconfig_timer, (unsigned long)nn);
- setup_timer(&nn->rx_filter_stats_timer,
- nfp_net_filter_stats_timer, (unsigned long)nn);
return nn;
}