On 26/09/2021 08:57, Alvin Zhang wrote:
Some packets are discarded by the NIC because they are larger than
the MTU, these packets should be counted as "RX error" instead of
"RX packet".
The register 'GL_RXERR1' can count above discarded packets.
This patch adds reading and calculation of the 'GL_RXERR1' counter
when reporting DPDK statistics.
Fixes: f4a91c38b4ad ("i40e: add extended stats")
Cc: sta...@dpdk.org
Signed-off-by: Alvin Zhang <alvinx.zh...@intel.com>
---
drivers/net/i40e/i40e_ethdev.c | 16 +++++++++++++---
drivers/net/i40e/i40e_ethdev.h | 10 ++++++++++
2 files changed, 23 insertions(+), 3 deletions(-)
It's a bit hard to understand the code for someone not familiar with the
i40e stats. I think it needs careful review from i40e maintainers. A few
questions below,
Did you test this with testpmd? Can you show an example of a test where
these packets are now correctly accounted for?
I see there is also an RXERR2 register that catches other errors, does
it need to be considered as well?
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7a2a828..30a2cdf 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -532,7 +532,7 @@ static int i40e_sw_tunnel_filter_insert(struct i40e_pf *pf,
/* store statistics names and its offset in stats structure */
struct rte_i40e_xstats_name_off {
char name[RTE_ETH_XSTATS_NAME_SIZE];
- unsigned offset;
+ int offset;
It is unusual to see you changing an offset to an int. You are expecting
negative offsets?
};
static const struct rte_i40e_xstats_name_off rte_i40e_stats_strings[] = {
@@ -542,6 +542,8 @@ struct rte_i40e_xstats_name_off {
{"rx_dropped_packets", offsetof(struct i40e_eth_stats, rx_discards)},
{"rx_unknown_protocol_packets", offsetof(struct i40e_eth_stats,
rx_unknown_protocol)},
+ {"rx_err1", offsetof(struct i40e_pf, rx_err1) -
+ offsetof(struct i40e_pf, stats)},
rx_err1 is correct by datasheet but meaningless to a user. Suggest to
find a more descriptive name, or document what it is, or tell the user
to reference the datasheet.
{"tx_unicast_packets", offsetof(struct i40e_eth_stats, tx_unicast)},
{"tx_multicast_packets", offsetof(struct i40e_eth_stats, tx_multicast)},
{"tx_broadcast_packets", offsetof(struct i40e_eth_stats, tx_broadcast)},
@@ -3238,6 +3240,10 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw
*hw)
pf->offset_loaded,
&os->eth.rx_unknown_protocol,
&ns->eth.rx_unknown_protocol);
+ i40e_stat_update_48(hw, I40E_GL_RXERR1_H(hw->pf_id + I40E_MAX_VF),
+ I40E_GL_RXERR1_L(hw->pf_id + I40E_MAX_VF),
+ pf->offset_loaded, &pf->rx_err1_offset,
+ &pf->rx_err1);
i40e_stat_update_48_in_64(hw, I40E_GLPRT_GOTCH(hw->port),
I40E_GLPRT_GOTCL(hw->port),
pf->offset_loaded, &os->eth.tx_bytes,
@@ -3437,7 +3443,8 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw *hw)
stats->ipackets = pf->main_vsi->eth_stats.rx_unicast +
pf->main_vsi->eth_stats.rx_multicast +
pf->main_vsi->eth_stats.rx_broadcast -
- pf->main_vsi->eth_stats.rx_discards;
+ pf->main_vsi->eth_stats.rx_discards -
+ pf->rx_err1;
stats->opackets = ns->eth.tx_unicast +
ns->eth.tx_multicast +
ns->eth.tx_broadcast;
@@ -3451,7 +3458,8 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw *hw)
pf->main_vsi->eth_stats.rx_discards;
stats->ierrors = ns->crc_errors +
ns->rx_length_errors + ns->rx_undersize +
- ns->rx_oversize + ns->rx_fragments + ns->rx_jabber;
+ ns->rx_oversize + ns->rx_fragments + ns->rx_jabber +
+ pf->rx_err1;
if (pf->vfs) {
for (i = 0; i < pf->vf_num; i++) {
@@ -6232,6 +6240,8 @@ struct i40e_vsi *
memset(&pf->stats_offset, 0, sizeof(struct i40e_hw_port_stats));
memset(&pf->internal_stats, 0, sizeof(struct i40e_eth_stats));
memset(&pf->internal_stats_offset, 0, sizeof(struct i40e_eth_stats));
+ pf->rx_err1 = 0;
+ pf->rx_err1_offset = 0;
ret = i40e_pf_get_switch_config(pf);
if (ret != I40E_SUCCESS) {
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index cd6deab..846c8d4 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -19,6 +19,13 @@
#include "base/i40e_type.h"
#include "base/virtchnl.h"
+#define I40E_GL_RXERR1_H(_i) (0x00318004 + ((_i) * 8))
+/**
+ * _i=0...143,
+ * counters 0-127 are for the 128 VFs,
+ * counters 128-143 are for the 16 PFs
+ */
+
#define I40E_VLAN_TAG_SIZE 4
#define I40E_AQ_LEN 32
@@ -1134,6 +1141,9 @@ struct i40e_pf {
struct i40e_hw_port_stats stats_offset;
struct i40e_hw_port_stats stats;
+ u64 rx_err1; /* rxerr1 */
+ u64 rx_err1_offset;
+
/* internal packet statistics, it should be excluded from the total */
struct i40e_eth_stats internal_stats_offset;
struct i40e_eth_stats internal_stats;
