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Message-ID: <20250915030505.1803478-11-michael.chan@broadcom.com>
Date: Sun, 14 Sep 2025 20:05:04 -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,
andrew+netdev@...n.ch,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com,
Somnath Kotur <somnath.kotur@...adcom.com>
Subject: [PATCH net-next 10/11] bnxt_en: Implement ethtool .get_tunable() for ETHTOOL_PFC_PREVENTION_TOUT
Return the current PFC watchdog timeout value if it is supported.
Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 18 +++++++++
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 +
.../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 21 ++++++++++
include/linux/bnxt/hsi.h | 40 +++++++++++++++++++
4 files changed, 81 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index f63e5dd429db..47579dc7e080 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -14748,6 +14748,23 @@ static bool bnxt_fw_pre_resv_vnics(struct bnxt *bp)
return false;
}
+static void bnxt_hwrm_pfcwd_qcaps(struct bnxt *bp)
+{
+ struct hwrm_queue_pfcwd_timeout_qcaps_output *resp;
+ struct hwrm_queue_pfcwd_timeout_qcaps_input *req;
+ int rc;
+
+ bp->max_pfcwd_tmo_ms = 0;
+ rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCWD_TIMEOUT_QCAPS);
+ if (rc)
+ return;
+ resp = hwrm_req_hold(bp, req);
+ rc = hwrm_req_send_silent(bp, req);
+ if (!rc)
+ bp->max_pfcwd_tmo_ms = le16_to_cpu(resp->max_pfcwd_timeout);
+ hwrm_req_drop(bp, req);
+}
+
static int bnxt_fw_init_one_p1(struct bnxt *bp)
{
int rc;
@@ -14825,6 +14842,7 @@ static int bnxt_fw_init_one_p2(struct bnxt *bp)
if (bnxt_fw_pre_resv_vnics(bp))
bp->fw_cap |= BNXT_FW_CAP_PRE_RESV_VNICS;
+ bnxt_hwrm_pfcwd_qcaps(bp);
bnxt_hwrm_func_qcfg(bp);
bnxt_hwrm_vnic_qcaps(bp);
bnxt_hwrm_port_led_qcaps(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index c0f46eaf91c0..06a4c2afdf8a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2426,6 +2426,8 @@ struct bnxt {
u8 max_q;
u8 num_tc;
+ u16 max_pfcwd_tmo_ms;
+
u8 tph_mode;
unsigned int current_interval;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 2830a2b17a27..d94a8a2bf0f9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -4399,6 +4399,23 @@ static int bnxt_get_eee(struct net_device *dev, struct ethtool_keee *edata)
return 0;
}
+static int bnxt_hwrm_pfcwd_qcfg(struct bnxt *bp, u16 *val)
+{
+ struct hwrm_queue_pfcwd_timeout_qcfg_output *resp;
+ struct hwrm_queue_pfcwd_timeout_qcfg_input *req;
+ int rc;
+
+ rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCWD_TIMEOUT_QCFG);
+ if (rc)
+ return rc;
+ resp = hwrm_req_hold(bp, req);
+ rc = hwrm_req_send(bp, req);
+ if (!rc)
+ *val = le16_to_cpu(resp->pfcwd_timeout_value);
+ hwrm_req_drop(bp, req);
+ return rc;
+}
+
static int bnxt_set_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna,
const void *data)
@@ -4431,6 +4448,10 @@ static int bnxt_get_tunable(struct net_device *dev,
case ETHTOOL_RX_COPYBREAK:
*(u32 *)data = bp->rx_copybreak;
break;
+ case ETHTOOL_PFC_PREVENTION_TOUT:
+ if (!bp->max_pfcwd_tmo_ms)
+ return -EOPNOTSUPP;
+ return bnxt_hwrm_pfcwd_qcfg(bp, data);
default:
return -EOPNOTSUPP;
}
diff --git a/include/linux/bnxt/hsi.h b/include/linux/bnxt/hsi.h
index 8c5dac3b3ef3..23e7b1290a92 100644
--- a/include/linux/bnxt/hsi.h
+++ b/include/linux/bnxt/hsi.h
@@ -6751,6 +6751,46 @@ struct hwrm_queue_dscp2pri_cfg_output {
u8 valid;
};
+/* hwrm_queue_pfcwd_timeout_qcaps_input (size:128b/16B) */
+struct hwrm_queue_pfcwd_timeout_qcaps_input {
+ __le16 req_type;
+ __le16 cmpl_ring;
+ __le16 seq_id;
+ __le16 target_id;
+ __le64 resp_addr;
+};
+
+/* hwrm_queue_pfcwd_timeout_qcaps_output (size:128b/16B) */
+struct hwrm_queue_pfcwd_timeout_qcaps_output {
+ __le16 error_code;
+ __le16 req_type;
+ __le16 seq_id;
+ __le16 resp_len;
+ __le16 max_pfcwd_timeout;
+ u8 unused_0[5];
+ u8 valid;
+};
+
+/* hwrm_queue_pfcwd_timeout_qcfg_input (size:128b/16B) */
+struct hwrm_queue_pfcwd_timeout_qcfg_input {
+ __le16 req_type;
+ __le16 cmpl_ring;
+ __le16 seq_id;
+ __le16 target_id;
+ __le64 resp_addr;
+};
+
+/* hwrm_queue_pfcwd_timeout_qcfg_output (size:128b/16B) */
+struct hwrm_queue_pfcwd_timeout_qcfg_output {
+ __le16 error_code;
+ __le16 req_type;
+ __le16 seq_id;
+ __le16 resp_len;
+ __le16 pfcwd_timeout_value;
+ u8 unused_0[5];
+ u8 valid;
+};
+
/* hwrm_vnic_alloc_input (size:192b/24B) */
struct hwrm_vnic_alloc_input {
__le16 req_type;
--
2.51.0
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