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Message-Id: <20240906080750.1068983-3-ap420073@gmail.com>
Date: Fri, 6 Sep 2024 08:07:50 +0000
From: Taehee Yoo <ap420073@...il.com>
To: davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
edumazet@...gle.com,
michael.chan@...adcom.com,
netdev@...r.kernel.org
Cc: ap420073@...il.com
Subject: [PATCH net-next 2/2] bnxt_en: add support for tcp-data-split ethtool command
NICs that uses bnxt_en driver supports tcp-data-split feature by the
name of HDS(header-data-split).
But there is no implementation for the HDS to enable or disable by
ethtool.
Only getting the current HDS status is implemented and The HDS is just
automatically enabled only when either LRO, HW-GRO, or JUMBO is enabled.
The hds_threshold follows rx-copybreak value. and it was unchangeable.
This implements `ethtool -G <interface name> tcp-data-split <value>`
command option.
The value can be <on>, <off>, and <auto> but the <auto> will be
automatically changed to <on>.
By this change, hds_threshold will always be 0 if tcp-data-split is
enabled until we provide some option to set/get tcp-data-split-threshold
option someday And hds_threshold doesn't follow rx-copybreak value
anymore.
HDS feature relies on the aggregation ring.
So, if HDS is enabled, the bnxt_en driver initializes the aggregation
ring.
This is the reason why BNXT_FLAG_AGG_RINGS contains HDS condition.
Signed-off-by: Taehee Yoo <ap420073@...il.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 11 ++++----
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 5 ++--
.../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 25 +++++++++++++++++--
3 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e1a4beece582..d3641616e313 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4453,6 +4453,7 @@ void bnxt_set_tpa_flags(struct bnxt *bp)
static void bnxt_init_ring_params(struct bnxt *bp)
{
bp->rx_copybreak = BNXT_DEFAULT_RX_COPYBREAK;
+ bp->flags |= BNXT_FLAG_HDS;
}
/* bp->rx_ring_size, bp->tx_ring_size, dev->mtu, BNXT_FLAG_{G|L}RO flags must
@@ -4473,7 +4474,7 @@ void bnxt_set_ring_params(struct bnxt *bp)
bp->rx_agg_ring_size = 0;
bp->rx_agg_nr_pages = 0;
- if (bp->flags & BNXT_FLAG_TPA)
+ if (bp->flags & BNXT_FLAG_TPA || bp->flags & BNXT_FLAG_HDS)
agg_factor = min_t(u32, 4, 65536 / BNXT_RX_PAGE_SIZE);
bp->flags &= ~BNXT_FLAG_JUMBO;
@@ -6420,16 +6421,14 @@ static int bnxt_hwrm_vnic_set_hds(struct bnxt *bp, struct bnxt_vnic_info *vnic)
req->flags = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_JUMBO_PLACEMENT);
req->enables = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_JUMBO_THRESH_VALID);
+ req->jumbo_thresh = cpu_to_le16(bp->rx_buf_use_size);
- if (BNXT_RX_PAGE_MODE(bp)) {
- req->jumbo_thresh = cpu_to_le16(bp->rx_buf_use_size);
- } else {
+ if (bp->flags & BNXT_FLAG_HDS) {
req->flags |= cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV4 |
VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV6);
req->enables |=
cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_HDS_THRESHOLD_VALID);
- req->jumbo_thresh = cpu_to_le16(bp->rx_copybreak);
- req->hds_threshold = cpu_to_le16(bp->rx_copybreak);
+ req->hds_threshold = 0;
}
req->vnic_id = cpu_to_le32(vnic->fw_vnic_id);
return hwrm_req_send(bp, req);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index ad95d0ede5d8..382a87a80bb4 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2198,8 +2198,6 @@ struct bnxt {
#define BNXT_FLAG_TPA (BNXT_FLAG_LRO | BNXT_FLAG_GRO)
#define BNXT_FLAG_JUMBO 0x10
#define BNXT_FLAG_STRIP_VLAN 0x20
- #define BNXT_FLAG_AGG_RINGS (BNXT_FLAG_JUMBO | BNXT_FLAG_GRO | \
- BNXT_FLAG_LRO)
#define BNXT_FLAG_RFS 0x100
#define BNXT_FLAG_SHARED_RINGS 0x200
#define BNXT_FLAG_PORT_STATS 0x400
@@ -2220,6 +2218,9 @@ struct bnxt {
#define BNXT_FLAG_ROCE_MIRROR_CAP 0x4000000
#define BNXT_FLAG_TX_COAL_CMPL 0x8000000
#define BNXT_FLAG_PORT_STATS_EXT 0x10000000
+ #define BNXT_FLAG_HDS 0x20000000
+ #define BNXT_FLAG_AGG_RINGS (BNXT_FLAG_JUMBO | BNXT_FLAG_GRO | \
+ BNXT_FLAG_LRO | BNXT_FLAG_HDS)
#define BNXT_FLAG_ALL_CONFIG_FEATS (BNXT_FLAG_TPA | \
BNXT_FLAG_RFS | \
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 052b53937757..f619a0bc3a6a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -829,12 +829,16 @@ static void bnxt_get_ringparam(struct net_device *dev,
if (bp->flags & BNXT_FLAG_AGG_RINGS) {
ering->rx_max_pending = BNXT_MAX_RX_DESC_CNT_JUM_ENA;
ering->rx_jumbo_max_pending = BNXT_MAX_RX_JUM_DESC_CNT;
- kernel_ering->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
} else {
ering->rx_max_pending = BNXT_MAX_RX_DESC_CNT;
ering->rx_jumbo_max_pending = 0;
- kernel_ering->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_DISABLED;
}
+
+ if (bp->flags & BNXT_FLAG_HDS)
+ kernel_ering->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
+ else
+ kernel_ering->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_DISABLED;
+
ering->tx_max_pending = BNXT_MAX_TX_DESC_CNT;
ering->rx_pending = bp->rx_ring_size;
@@ -854,9 +858,25 @@ static int bnxt_set_ringparam(struct net_device *dev,
(ering->tx_pending < BNXT_MIN_TX_DESC_CNT))
return -EINVAL;
+ if (kernel_ering->tcp_data_split != ETHTOOL_TCP_DATA_SPLIT_DISABLED &&
+ BNXT_RX_PAGE_MODE(bp)) {
+ NL_SET_ERR_MSG_MOD(extack, "tcp-data-split can not be enabled with XDP");
+ return -EINVAL;
+ }
+
if (netif_running(dev))
bnxt_close_nic(bp, false, false);
+ switch (kernel_ering->tcp_data_split) {
+ case ETHTOOL_TCP_DATA_SPLIT_UNKNOWN:
+ case ETHTOOL_TCP_DATA_SPLIT_ENABLED:
+ bp->flags |= BNXT_FLAG_HDS;
+ break;
+ case ETHTOOL_TCP_DATA_SPLIT_DISABLED:
+ bp->flags &= ~BNXT_FLAG_HDS;
+ break;
+ }
+
bp->rx_ring_size = ering->rx_pending;
bp->tx_ring_size = ering->tx_pending;
bnxt_set_ring_params(bp);
@@ -5344,6 +5364,7 @@ const struct ethtool_ops bnxt_ethtool_ops = {
ETHTOOL_COALESCE_STATS_BLOCK_USECS |
ETHTOOL_COALESCE_USE_ADAPTIVE_RX |
ETHTOOL_COALESCE_USE_CQE,
+ .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT,
.get_link_ksettings = bnxt_get_link_ksettings,
.set_link_ksettings = bnxt_set_link_ksettings,
.get_fec_stats = bnxt_get_fec_stats,
--
2.34.1
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