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Date: Wed, 21 Sep 2016 11:44:03 +0100
From: Jakub Kicinski <jakub.kicinski@...ronome.com>
To: netdev@...r.kernel.org
Cc: ast@...nel.org, daniel@...earbox.net,
Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCHv7 net-next 11/15] nfp: bpf: allow offloaded filters to update stats
Periodically poll stats and call into offloaded actions
to update them.
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
v3:
- add missing hunk with ethtool stats.
---
drivers/net/ethernet/netronome/nfp/nfp_net.h | 19 +++++++
.../net/ethernet/netronome/nfp/nfp_net_common.c | 3 ++
.../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 12 +++++
.../net/ethernet/netronome/nfp/nfp_net_offload.c | 63 ++++++++++++++++++++++
4 files changed, 97 insertions(+)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h
index ea6f5e667f27..13c6a9001b4d 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h
@@ -62,6 +62,9 @@
/* Max time to wait for NFP to respond on updates (in seconds) */
#define NFP_NET_POLL_TIMEOUT 5
+/* Interval for reading offloaded filter stats */
+#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)
+
/* Bar allocation */
#define NFP_NET_CTRL_BAR 0
#define NFP_NET_Q0_BAR 2
@@ -405,6 +408,11 @@ static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
fw_ver->minor == minor;
}
+struct nfp_stat_pair {
+ u64 pkts;
+ u64 bytes;
+};
+
/**
* struct nfp_net - NFP network device structure
* @pdev: Backpointer to PCI device
@@ -428,6 +436,11 @@ static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
* @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_tx_rings: Maximum number of TX rings supported by the Firmware
* @max_rx_rings: Maximum number of RX rings supported by the Firmware
* @num_tx_rings: Currently configured number of TX rings
@@ -504,6 +517,11 @@ 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;
+
int max_tx_rings;
int max_rx_rings;
@@ -775,6 +793,7 @@ static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn)
}
#endif /* CONFIG_NFP_NET_DEBUG */
+void nfp_net_filter_stats_timer(unsigned long data);
int
nfp_net_bpf_offload(struct nfp_net *nn, u32 handle, __be16 proto,
struct tc_cls_bpf_offload *cls_bpf);
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 51978dfe883b..f091eb758ca2 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2703,10 +2703,13 @@ struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev,
nn->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;
}
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 4c9897220969..3418f2277e9d 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -106,6 +106,18 @@ static const struct _nfp_net_et_stats nfp_net_et_stats[] = {
{"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)},
{"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)},
{"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)},
+
+ {"bpf_pass_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP0_FRAMES)},
+ {"bpf_pass_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP0_BYTES)},
+ /* see comments in outro functions in nfp_bpf_jit.c to find out
+ * how different BPF modes use app-specific counters
+ */
+ {"bpf_app1_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP1_FRAMES)},
+ {"bpf_app1_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP1_BYTES)},
+ {"bpf_app2_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP2_FRAMES)},
+ {"bpf_app2_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP2_BYTES)},
+ {"bpf_app3_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP3_FRAMES)},
+ {"bpf_app3_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_APP3_BYTES)},
};
#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_offload.c b/drivers/net/ethernet/netronome/nfp/nfp_net_offload.c
index 313988cd3a43..0537a53e2174 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_offload.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_offload.c
@@ -51,6 +51,60 @@
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
+void nfp_net_filter_stats_timer(unsigned long data)
+{
+ struct nfp_net *nn = (void *)data;
+ struct nfp_stat_pair latest;
+
+ spin_lock_bh(&nn->rx_filter_lock);
+
+ if (nn->ctrl & NFP_NET_CFG_CTRL_BPF)
+ mod_timer(&nn->rx_filter_stats_timer,
+ jiffies + NFP_NET_STAT_POLL_IVL);
+
+ spin_unlock_bh(&nn->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;
+
+ nn->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;
+}
+
+static int
+nfp_net_bpf_stats_update(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
+{
+ struct tc_action *a;
+ LIST_HEAD(actions);
+ u64 bytes, pkts;
+
+ pkts = nn->rx_filter.pkts - nn->rx_filter_prev.pkts;
+ bytes = nn->rx_filter.bytes - nn->rx_filter_prev.bytes;
+ bytes -= pkts * ETH_HLEN;
+
+ nn->rx_filter_prev = nn->rx_filter;
+
+ preempt_disable();
+
+ tcf_exts_to_list(cls_bpf->exts, &actions);
+ list_for_each_entry(a, &actions, list)
+ tcf_action_stats_update(a, bytes, pkts, nn->rx_filter_change);
+
+ preempt_enable();
+
+ return 0;
+}
+
static int
nfp_net_bpf_get_act(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
{
@@ -147,6 +201,9 @@ nfp_net_bpf_load_and_start(struct nfp_net *nn, u32 tc_flags,
nn_err(nn, "FW command error while enabling BPF: %d\n", err);
dma_free_coherent(&nn->pdev->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);
}
static int nfp_net_bpf_stop(struct nfp_net *nn)
@@ -154,9 +211,12 @@ static int nfp_net_bpf_stop(struct nfp_net *nn)
if (!(nn->ctrl & NFP_NET_CFG_CTRL_BPF))
return 0;
+ spin_lock_bh(&nn->rx_filter_lock);
nn->ctrl &= ~NFP_NET_CFG_CTRL_BPF;
+ spin_unlock_bh(&nn->rx_filter_lock);
nn_writel(nn, NFP_NET_CFG_CTRL, nn->ctrl);
+ del_timer_sync(&nn->rx_filter_stats_timer);
nn->bpf_offload_skip_sw = 0;
return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
@@ -214,6 +274,9 @@ nfp_net_bpf_offload(struct nfp_net *nn, u32 handle, __be16 proto,
case TC_CLSBPF_DESTROY:
return nfp_net_bpf_stop(nn);
+ case TC_CLSBPF_STATS:
+ return nfp_net_bpf_stats_update(nn, cls_bpf);
+
default:
return -ENOTSUPP;
}
--
1.9.1
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