Commit fa18932a authored by Michael Chan's avatar Michael Chan Committed by Paolo Abeni
Browse files

bnxt_en: Implement ethtool .set_tunable() for ETHTOOL_PFC_PREVENTION_TOUT 



Support the setting of the tunable if it is supported by firmware.
The supported range is 0 to the maximum msec value reported by
firmware.  PFC_STORM_PREVENTION_AUTO is also supported and 0 means it
is disabled.

Reviewed-by: default avatarAndy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250917040839.1924698-11-michael.chan@broadcom.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 6684b91d

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

+23 −1
Original line number Diff line number Diff line
@@ -4416,12 +4416,25 @@ static int bnxt_hwrm_pfcwd_qcfg(struct bnxt *bp, u16 *val) 
	return rc;

}



static int bnxt_hwrm_pfcwd_cfg(struct bnxt *bp, u16 val)

{

	struct hwrm_queue_pfcwd_timeout_cfg_input *req;

	int rc;



	rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCWD_TIMEOUT_CFG);

	if (rc)

		return rc;

	req->pfcwd_timeout_value = cpu_to_le16(val);

	rc = hwrm_req_send(bp, req);

	return rc;

}



static int bnxt_set_tunable(struct net_device *dev,

			    const struct ethtool_tunable *tuna,

			    const void *data)

{

	struct bnxt *bp = netdev_priv(dev);

	u32 rx_copybreak;

	u32 rx_copybreak, val;



	switch (tuna->id) {

	case ETHTOOL_RX_COPYBREAK:
@@ -4434,6 +4447,15 @@ static int bnxt_set_tunable(struct net_device *dev, 
			bp->rx_copybreak = rx_copybreak;

		}

		return 0;

	case ETHTOOL_PFC_PREVENTION_TOUT:

		if (BNXT_VF(bp) || !bp->max_pfcwd_tmo_ms)

			return -EOPNOTSUPP;



		val = *(u16 *)data;

		if (val > bp->max_pfcwd_tmo_ms &&

		    val != PFC_STORM_PREVENTION_AUTO)

			return -EINVAL;

		return bnxt_hwrm_pfcwd_cfg(bp, val);

	default:

		return -EOPNOTSUPP;

	}

include/linux/bnxt/hsi.h

+21 −0
Original line number Diff line number Diff line
@@ -6771,6 +6771,27 @@ struct hwrm_queue_pfcwd_timeout_qcaps_output { 
	u8	valid;

};



/* hwrm_queue_pfcwd_timeout_cfg_input (size:192b/24B) */

struct hwrm_queue_pfcwd_timeout_cfg_input {

	__le16	req_type;

	__le16	cmpl_ring;

	__le16	seq_id;

	__le16	target_id;

	__le64	resp_addr;

	__le16	pfcwd_timeout_value;

	u8	unused_0[6];

};



/* hwrm_queue_pfcwd_timeout_cfg_output (size:128b/16B) */

struct hwrm_queue_pfcwd_timeout_cfg_output {

	__le16	error_code;

	__le16	req_type;

	__le16	seq_id;

	__le16	resp_len;

	u8	unused_0[7];

	u8	valid;

};



/* hwrm_queue_pfcwd_timeout_qcfg_input (size:128b/16B) */

struct hwrm_queue_pfcwd_timeout_qcfg_input {

	__le16	req_type;