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Message-Id: <1494449110-23785-12-git-send-email-isubramanian@apm.com>
Date: Wed, 10 May 2017 13:45:09 -0700
From: Iyappan Subramanian <isubramanian@....com>
To: davem@...emloft.net, netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, patches@....com,
Quan Nguyen <qnguyen@....com>,
Iyappan Subramanian <isubramanian@....com>
Subject: [PATCH v2 net-next 11/12] drivers: net: xgene: Workaround for HW errata 10GE_10/ENET_15
From: Quan Nguyen <qnguyen@....com>
This patch adds workaround for HW errata 10GE_10 and ENET_15:
"HW statistic counters value are duplicated".
- RFCS duplicates RALN counter
- RFLR duplicates RUND counter
- TFCS duplicates TFRG counter
- RALN should be intepreted as 0 in 10G mode
Signed-off-by: Quan Nguyen <qnguyen@....com>
Signed-off-by: Iyappan Subramanian <isubramanian@....com>
---
.../net/ethernet/apm/xgene/xgene_enet_ethtool.c | 33 ++++++++++++++++++----
drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 20 +++++++++++--
drivers/net/ethernet/apm/xgene/xgene_enet_main.h | 2 ++
3 files changed, 46 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
index 5c2c84a..0fdec78 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
@@ -71,6 +71,7 @@ struct xgene_gstrings_stats {
XGENE_EXTD_STAT(rx_oversize_pkt_cntr, ROVR, 16),
XGENE_EXTD_STAT(rx_fragments_cntr, RFRG, 16),
XGENE_EXTD_STAT(rx_jabber_cntr, RJBR, 16),
+ XGENE_EXTD_STAT(rx_jabber_recov_cntr, DUMP, 0),
XGENE_EXTD_STAT(rx_dropped_pkt_cntr, RDRP, 16),
XGENE_EXTD_STAT(rx_overrun_cntr, DUMP, 0),
XGENE_EXTD_STAT(tx_multicast_pkt_cntr, TMCA, 31),
@@ -96,9 +97,16 @@ struct xgene_gstrings_stats {
#define XGENE_STATS_LEN ARRAY_SIZE(gstrings_stats)
#define XGENE_EXTD_STATS_LEN ARRAY_SIZE(gstrings_extd_stats)
+#define RFCS_IDX 7
+#define RALN_IDX 13
+#define RFLR_IDX 14
#define FALSE_RFLR_IDX 15
-#define RX_OVERRUN_IDX 23
-#define TX_UNDERRUN_IDX 42
+#define RUND_IDX 18
+#define FALSE_RJBR_IDX 22
+#define RX_OVERRUN_IDX 24
+#define TFCS_IDX 38
+#define TFRG_IDX 42
+#define TX_UNDERRUN_IDX 43
static void xgene_get_drvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
@@ -218,14 +226,25 @@ static int xgene_get_sset_count(struct net_device *ndev, int sset)
static void xgene_get_extd_stats(struct xgene_enet_pdata *pdata)
{
u32 rx_drop, tx_drop;
- u32 tmp;
+ u32 mask, tmp;
int i;
for (i = 0; i < XGENE_EXTD_STATS_LEN; i++) {
tmp = xgene_enet_rd_stat(pdata, gstrings_extd_stats[i].addr);
- if (gstrings_extd_stats[i].mask)
- pdata->extd_stats[i] += tmp &
- GENMASK(gstrings_extd_stats[i].mask - 1, 0);
+ if (gstrings_extd_stats[i].mask) {
+ mask = GENMASK(gstrings_extd_stats[i].mask - 1, 0);
+ pdata->extd_stats[i] += (tmp & mask);
+ }
+ }
+
+ if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
+ /* Errata 10GE_10 - SW should intepret RALN as 0 */
+ pdata->extd_stats[RALN_IDX] = 0;
+ } else {
+ /* Errata ENET_15 - Fixes RFCS, RFLR, TFCS counter */
+ pdata->extd_stats[RFCS_IDX] -= pdata->extd_stats[RALN_IDX];
+ pdata->extd_stats[RFLR_IDX] -= pdata->extd_stats[RUND_IDX];
+ pdata->extd_stats[TFCS_IDX] -= pdata->extd_stats[TFRG_IDX];
}
pdata->mac_ops->get_drop_cnt(pdata, &rx_drop, &tx_drop);
@@ -234,6 +253,8 @@ static void xgene_get_extd_stats(struct xgene_enet_pdata *pdata)
/* Errata 10GE_8 - Update Frame recovered from Errata 10GE_8/ENET_11 */
pdata->extd_stats[FALSE_RFLR_IDX] = pdata->false_rflr;
+ /* Errata ENET_15 - Jabber Frame recov'ed from Errata 10GE_10/ENET_15 */
+ pdata->extd_stats[FALSE_RJBR_IDX] = pdata->vlan_rjbr;
}
int xgene_extd_stats_init(struct xgene_enet_pdata *pdata)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index c2d38da..01e389d 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -656,6 +656,18 @@ static void xgene_enet_free_pagepool(struct xgene_enet_desc_ring *buf_pool,
buf_pool->head = head;
}
+/* Errata 10GE_10 and ENET_15 - Fix duplicated HW statistic counters */
+static bool xgene_enet_errata_10GE_10(struct sk_buff *skb, u32 len, u8 status)
+{
+ if (status == INGRESS_CRC &&
+ len >= (ETHER_STD_PACKET + 1) &&
+ len <= (ETHER_STD_PACKET + 4) &&
+ skb->protocol == htons(ETH_P_8021Q))
+ return true;
+
+ return false;
+}
+
/* Errata 10GE_8 and ENET_11 - allow packet with length <=64B */
static bool xgene_enet_errata_10GE_8(struct sk_buff *skb, u32 len, u8 status)
{
@@ -706,14 +718,16 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring,
status = (GET_VAL(ELERR, le64_to_cpu(raw_desc->m0)) << LERR_LEN) |
GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
if (unlikely(status)) {
- if (!xgene_enet_errata_10GE_8(skb, datalen, status)) {
+ if (xgene_enet_errata_10GE_8(skb, datalen, status)) {
+ pdata->false_rflr++;
+ } else if (xgene_enet_errata_10GE_10(skb, datalen, status)) {
+ pdata->vlan_rjbr++;
+ } else {
dev_kfree_skb_any(skb);
xgene_enet_free_pagepool(page_pool, raw_desc, exp_desc);
xgene_enet_parse_error(rx_ring, status);
rx_ring->rx_dropped++;
goto out;
- } else {
- pdata->false_rflr++;
}
}
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index 0f5f0b0..9857685 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -42,6 +42,7 @@
#define XGENE_DRV_VERSION "v1.0"
#define ETHER_MIN_PACKET 64
+#define ETHER_STD_PACKET 1518
#define XGENE_ENET_STD_MTU 1536
#define XGENE_ENET_MAX_MTU 9600
#define SKB_BUFFER_SIZE (XGENE_ENET_STD_MTU - NET_IP_ALIGN)
@@ -225,6 +226,7 @@ struct xgene_enet_pdata {
struct xgene_enet_cle cle;
u64 *extd_stats;
u64 false_rflr;
+ u64 vlan_rjbr;
spinlock_t stats_lock; /* statistics lock */
const struct xgene_mac_ops *mac_ops;
spinlock_t mac_lock; /* mac lock */
--
1.9.1
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