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Message-ID: <20240626164307.219568-7-michael.chan@broadcom.com>
Date: Wed, 26 Jun 2024 09:43:03 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com,
richardcochran@...il.com
Subject: [PATCH net-next 06/10] bnxt_en: Refactor all PTP TX timestamp fields into a struct
From: Pavan Chebbi <pavan.chebbi@...adcom.com>
On the older 5750X (P5) chips, we currently support only 1 TX PTP
packet in-flight waiting for the timestamp. Refactor the
datastructures to prepare to support up to 4 TX PTP packets.
Combine all fields required for PTP TX timestamp query into one
structure. An array of this structure will be added in follow-on
patches to support multiple outstanding TX timestamps.
Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 10 +++--
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 43 ++++++++++---------
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 15 ++++---
3 files changed, 40 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 93858df547b2..c284aa370c64 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -516,14 +516,18 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
lflags |= cpu_to_le32(TX_BD_FLAGS_STAMP);
tx_buf->is_ts_pkt = 1;
} else if (!skb_is_gso(skb)) {
+ u16 seq_id, hdr_off;
+
if (atomic_dec_if_positive(&ptp->tx_avail) < 0) {
atomic64_inc(&ptp->stats.ts_err);
goto tx_no_ts;
}
- if (!bnxt_ptp_parse(skb, &ptp->tx_seqid,
- &ptp->tx_hdr_off)) {
+
+ if (!bnxt_ptp_parse(skb, &seq_id, &hdr_off)) {
if (vlan_tag_flags)
- ptp->tx_hdr_off += VLAN_HLEN;
+ hdr_off += VLAN_HLEN;
+ ptp->txts_req.tx_seqid = seq_id;
+ ptp->txts_req.tx_hdr_off = hdr_off;
lflags |= cpu_to_le32(TX_BD_FLAGS_STAMP);
tx_buf->is_ts_pkt = 1;
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index a3795ef8887d..8431cd0ed9e9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -123,11 +123,12 @@ static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts,
req->flags = cpu_to_le32(flags);
if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) ==
PORT_TS_QUERY_REQ_FLAGS_PATH_TX) {
+ struct bnxt_ptp_tx_req *txts_req = &bp->ptp_cfg->txts_req;
u32 tmo_us = txts_tmo * 1000;
req->enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES);
- req->ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid);
- req->ptp_hdr_offset = cpu_to_le16(bp->ptp_cfg->tx_hdr_off);
+ req->ptp_seq_id = cpu_to_le32(txts_req->tx_seqid);
+ req->ptp_hdr_offset = cpu_to_le16(txts_req->tx_hdr_off);
if (!tmo_us)
tmo_us = BNXT_PTP_QTS_TIMEOUT;
tmo_us = min(tmo_us, BNXT_PTP_QTS_MAX_TMO_US);
@@ -686,15 +687,17 @@ static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
{
struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
struct skb_shared_hwtstamps timestamp;
+ struct bnxt_ptp_tx_req *txts_req;
unsigned long now = jiffies;
u64 ts = 0, ns = 0;
u32 tmo = 0;
int rc;
- if (!ptp->txts_pending)
- ptp->abs_txts_tmo = now + msecs_to_jiffies(ptp->txts_tmo);
- if (!time_after_eq(now, ptp->abs_txts_tmo))
- tmo = jiffies_to_msecs(ptp->abs_txts_tmo - now);
+ txts_req = &ptp->txts_req;
+ if (!txts_req->txts_pending)
+ txts_req->abs_txts_tmo = now + msecs_to_jiffies(ptp->txts_tmo);
+ if (!time_after_eq(now, txts_req->abs_txts_tmo))
+ tmo = jiffies_to_msecs(txts_req->abs_txts_tmo - now);
rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts,
tmo);
if (!rc) {
@@ -703,11 +706,11 @@ static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
ns = timecounter_cyc2time(&ptp->tc, ts);
spin_unlock_bh(&ptp->ptp_lock);
timestamp.hwtstamp = ns_to_ktime(ns);
- skb_tstamp_tx(ptp->tx_skb, ×tamp);
+ skb_tstamp_tx(txts_req->tx_skb, ×tamp);
ptp->stats.ts_pkts++;
} else {
- if (!time_after_eq(jiffies, ptp->abs_txts_tmo)) {
- ptp->txts_pending = true;
+ if (!time_after_eq(jiffies, txts_req->abs_txts_tmo)) {
+ txts_req->txts_pending = true;
return;
}
ptp->stats.ts_lost++;
@@ -715,10 +718,10 @@ static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
"TS query for TX timer failed rc = %x\n", rc);
}
- dev_kfree_skb_any(ptp->tx_skb);
- ptp->tx_skb = NULL;
+ dev_kfree_skb_any(txts_req->tx_skb);
+ txts_req->tx_skb = NULL;
atomic_inc(&ptp->tx_avail);
- ptp->txts_pending = false;
+ txts_req->txts_pending = false;
}
static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
@@ -728,8 +731,8 @@ static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
unsigned long now = jiffies;
struct bnxt *bp = ptp->bp;
- if (ptp->tx_skb)
- bnxt_stamp_tx_skb(bp, ptp->tx_skb);
+ if (ptp->txts_req.tx_skb)
+ bnxt_stamp_tx_skb(bp, ptp->txts_req.tx_skb);
if (!time_after_eq(now, ptp->next_period))
return ptp->next_period - now;
@@ -742,7 +745,7 @@ static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
spin_unlock_bh(&ptp->ptp_lock);
ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD;
}
- if (ptp->txts_pending)
+ if (ptp->txts_req.txts_pending)
return 0;
return HZ;
}
@@ -751,11 +754,11 @@ int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb)
{
struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
- if (ptp->tx_skb) {
+ if (ptp->txts_req.tx_skb) {
netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n");
return -EBUSY;
}
- ptp->tx_skb = skb;
+ ptp->txts_req.tx_skb = skb;
ptp_schedule_worker(ptp->ptp_clock, 0);
return 0;
}
@@ -1056,9 +1059,9 @@ void bnxt_ptp_clear(struct bnxt *bp)
kfree(ptp->ptp_info.pin_config);
ptp->ptp_info.pin_config = NULL;
- if (ptp->tx_skb) {
- dev_kfree_skb_any(ptp->tx_skb);
- ptp->tx_skb = NULL;
+ if (ptp->txts_req.tx_skb) {
+ dev_kfree_skb_any(ptp->txts_req.tx_skb);
+ ptp->txts_req.tx_skb = NULL;
}
bnxt_unmap_ptp_regs(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
index d38c3500827f..90f1418211e9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
@@ -85,6 +85,14 @@ struct bnxt_ptp_stats {
atomic64_t ts_err;
};
+struct bnxt_ptp_tx_req {
+ struct sk_buff *tx_skb;
+ u16 tx_seqid;
+ u16 tx_hdr_off;
+ u8 txts_pending:1;
+ unsigned long abs_txts_tmo;
+};
+
struct bnxt_ptp_cfg {
struct ptp_clock_info ptp_info;
struct ptp_clock *ptp_clock;
@@ -93,7 +101,6 @@ struct bnxt_ptp_cfg {
struct bnxt_pps pps_info;
/* serialize timecounter access */
spinlock_t ptp_lock;
- struct sk_buff *tx_skb;
u64 current_time;
u64 old_time;
unsigned long next_period;
@@ -102,8 +109,8 @@ struct bnxt_ptp_cfg {
/* a 23b shift cyclecounter will overflow in ~36 mins. Check overflow every 18 mins. */
#define BNXT_PHC_OVERFLOW_PERIOD (18 * 60 * HZ)
- u16 tx_seqid;
- u16 tx_hdr_off;
+ struct bnxt_ptp_tx_req txts_req;
+
struct bnxt *bp;
atomic_t tx_avail;
#define BNXT_MAX_TX_TS 1
@@ -123,14 +130,12 @@ struct bnxt_ptp_cfg {
BNXT_PTP_MSG_PDELAY_REQ | \
BNXT_PTP_MSG_PDELAY_RESP)
u8 tx_tstamp_en:1;
- u8 txts_pending:1;
int rx_filter;
u32 tstamp_filters;
u32 refclk_regs[2];
u32 refclk_mapped_regs[2];
u32 txts_tmo;
- unsigned long abs_txts_tmo;
struct bnxt_ptp_stats stats;
};
--
2.30.1
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