Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 791 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
new file mode 100644
index 000000000..caab3d626
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
@@ -0,0 +1,791 @@
+/* Broadcom NetXtreme-C/E network driver.
+ *
+ * Copyright (c) 2014-2016 Broadcom Corporation
+ * Copyright (c) 2016-2017 Broadcom Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/rtnetlink.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/etherdevice.h>
+#include <rdma/ib_verbs.h>
+#include "bnxt_hsi.h"
+#include "bnxt.h"
+#include "bnxt_hwrm.h"
+#include "bnxt_dcb.h"
+
+#ifdef CONFIG_BNXT_DCB
+static int bnxt_queue_to_tc(struct bnxt *bp, u8 queue_id)
+{
+	int i, j;
+
+	for (i = 0; i < bp->max_tc; i++) {
+		if (bp->q_info[i].queue_id == queue_id) {
+			for (j = 0; j < bp->max_tc; j++) {
+				if (bp->tc_to_qidx[j] == i)
+					return j;
+			}
+		}
+	}
+	return -EINVAL;
+}
+
+static int bnxt_hwrm_queue_pri2cos_cfg(struct bnxt *bp, struct ieee_ets *ets)
+{
+	struct hwrm_queue_pri2cos_cfg_input *req;
+	u8 *pri2cos;
+	int rc, i;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_CFG);
+	if (rc)
+		return rc;
+
+	req->flags = cpu_to_le32(QUEUE_PRI2COS_CFG_REQ_FLAGS_PATH_BIDIR |
+				 QUEUE_PRI2COS_CFG_REQ_FLAGS_IVLAN);
+
+	pri2cos = &req->pri0_cos_queue_id;
+	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+		u8 qidx;
+
+		req->enables |= cpu_to_le32(
+			QUEUE_PRI2COS_CFG_REQ_ENABLES_PRI0_COS_QUEUE_ID << i);
+
+		qidx = bp->tc_to_qidx[ets->prio_tc[i]];
+		pri2cos[i] = bp->q_info[qidx].queue_id;
+	}
+	return hwrm_req_send(bp, req);
+}
+
+static int bnxt_hwrm_queue_pri2cos_qcfg(struct bnxt *bp, struct ieee_ets *ets)
+{
+	struct hwrm_queue_pri2cos_qcfg_output *resp;
+	struct hwrm_queue_pri2cos_qcfg_input *req;
+	int rc;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_PRI2COS_QCFG);
+	if (rc)
+		return rc;
+
+	req->flags = cpu_to_le32(QUEUE_PRI2COS_QCFG_REQ_FLAGS_IVLAN);
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send(bp, req);
+	if (!rc) {
+		u8 *pri2cos = &resp->pri0_cos_queue_id;
+		int i;
+
+		for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+			u8 queue_id = pri2cos[i];
+			int tc;
+
+			tc = bnxt_queue_to_tc(bp, queue_id);
+			if (tc >= 0)
+				ets->prio_tc[i] = tc;
+		}
+	}
+	hwrm_req_drop(bp, req);
+	return rc;
+}
+
+static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
+				      u8 max_tc)
+{
+	struct hwrm_queue_cos2bw_cfg_input *req;
+	struct bnxt_cos2bw_cfg cos2bw;
+	void *data;
+	int rc, i;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_CFG);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < max_tc; i++) {
+		u8 qidx = bp->tc_to_qidx[i];
+
+		req->enables |= cpu_to_le32(
+			QUEUE_COS2BW_CFG_REQ_ENABLES_COS_QUEUE_ID0_VALID <<
+			qidx);
+
+		memset(&cos2bw, 0, sizeof(cos2bw));
+		cos2bw.queue_id = bp->q_info[qidx].queue_id;
+		if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_STRICT) {
+			cos2bw.tsa =
+				QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP;
+			cos2bw.pri_lvl = i;
+		} else {
+			cos2bw.tsa =
+				QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_ETS;
+			cos2bw.bw_weight = ets->tc_tx_bw[i];
+			/* older firmware requires min_bw to be set to the
+			 * same weight value in percent.
+			 */
+			cos2bw.min_bw =
+				cpu_to_le32((ets->tc_tx_bw[i] * 100) |
+					    BW_VALUE_UNIT_PERCENT1_100);
+		}
+		data = &req->unused_0 + qidx * (sizeof(cos2bw) - 4);
+		memcpy(data, &cos2bw.queue_id, sizeof(cos2bw) - 4);
+		if (qidx == 0) {
+			req->queue_id0 = cos2bw.queue_id;
+			req->unused_0 = 0;
+		}
+	}
+	return hwrm_req_send(bp, req);
+}
+
+static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
+{
+	struct hwrm_queue_cos2bw_qcfg_output *resp;
+	struct hwrm_queue_cos2bw_qcfg_input *req;
+	struct bnxt_cos2bw_cfg cos2bw;
+	void *data;
+	int rc, i;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_QCFG);
+	if (rc)
+		return rc;
+
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send(bp, req);
+	if (rc) {
+		hwrm_req_drop(bp, req);
+		return rc;
+	}
+
+	data = &resp->queue_id0 + offsetof(struct bnxt_cos2bw_cfg, queue_id);
+	for (i = 0; i < bp->max_tc; i++, data += sizeof(cos2bw.cfg)) {
+		int tc;
+
+		memcpy(&cos2bw.cfg, data, sizeof(cos2bw.cfg));
+		if (i == 0)
+			cos2bw.queue_id = resp->queue_id0;
+
+		tc = bnxt_queue_to_tc(bp, cos2bw.queue_id);
+		if (tc < 0)
+			continue;
+
+		if (cos2bw.tsa ==
+		    QUEUE_COS2BW_QCFG_RESP_QUEUE_ID0_TSA_ASSIGN_SP) {
+			ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_STRICT;
+		} else {
+			ets->tc_tsa[tc] = IEEE_8021QAZ_TSA_ETS;
+			ets->tc_tx_bw[tc] = cos2bw.bw_weight;
+		}
+	}
+	hwrm_req_drop(bp, req);
+	return 0;
+}
+
+static int bnxt_queue_remap(struct bnxt *bp, unsigned int lltc_mask)
+{
+	unsigned long qmap = 0;
+	int max = bp->max_tc;
+	int i, j, rc;
+
+	/* Assign lossless TCs first */
+	for (i = 0, j = 0; i < max; ) {
+		if (lltc_mask & (1 << i)) {
+			if (BNXT_LLQ(bp->q_info[j].queue_profile)) {
+				bp->tc_to_qidx[i] = j;
+				__set_bit(j, &qmap);
+				i++;
+			}
+			j++;
+			continue;
+		}
+		i++;
+	}
+
+	for (i = 0, j = 0; i < max; i++) {
+		if (lltc_mask & (1 << i))
+			continue;
+		j = find_next_zero_bit(&qmap, max, j);
+		bp->tc_to_qidx[i] = j;
+		__set_bit(j, &qmap);
+		j++;
+	}
+
+	if (netif_running(bp->dev)) {
+		bnxt_close_nic(bp, false, false);
+		rc = bnxt_open_nic(bp, false, false);
+		if (rc) {
+			netdev_warn(bp->dev, "failed to open NIC, rc = %d\n", rc);
+			return rc;
+		}
+	}
+	if (bp->ieee_ets) {
+		int tc = netdev_get_num_tc(bp->dev);
+
+		if (!tc)
+			tc = 1;
+		rc = bnxt_hwrm_queue_cos2bw_cfg(bp, bp->ieee_ets, tc);
+		if (rc) {
+			netdev_warn(bp->dev, "failed to config BW, rc = %d\n", rc);
+			return rc;
+		}
+		rc = bnxt_hwrm_queue_pri2cos_cfg(bp, bp->ieee_ets);
+		if (rc) {
+			netdev_warn(bp->dev, "failed to config prio, rc = %d\n", rc);
+			return rc;
+		}
+	}
+	return 0;
+}
+
+static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
+{
+	struct hwrm_queue_pfcenable_cfg_input *req;
+	struct ieee_ets *my_ets = bp->ieee_ets;
+	unsigned int tc_mask = 0, pri_mask = 0;
+	u8 i, pri, lltc_count = 0;
+	bool need_q_remap = false;
+	int rc;
+
+	if (!my_ets)
+		return -EINVAL;
+
+	for (i = 0; i < bp->max_tc; i++) {
+		for (pri = 0; pri < IEEE_8021QAZ_MAX_TCS; pri++) {
+			if ((pfc->pfc_en & (1 << pri)) &&
+			    (my_ets->prio_tc[pri] == i)) {
+				pri_mask |= 1 << pri;
+				tc_mask |= 1 << i;
+			}
+		}
+		if (tc_mask & (1 << i))
+			lltc_count++;
+	}
+	if (lltc_count > bp->max_lltc)
+		return -EINVAL;
+
+	for (i = 0; i < bp->max_tc; i++) {
+		if (tc_mask & (1 << i)) {
+			u8 qidx = bp->tc_to_qidx[i];
+
+			if (!BNXT_LLQ(bp->q_info[qidx].queue_profile)) {
+				need_q_remap = true;
+				break;
+			}
+		}
+	}
+
+	if (need_q_remap)
+		bnxt_queue_remap(bp, tc_mask);
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_CFG);
+	if (rc)
+		return rc;
+
+	req->flags = cpu_to_le32(pri_mask);
+	return hwrm_req_send(bp, req);
+}
+
+static int bnxt_hwrm_queue_pfc_qcfg(struct bnxt *bp, struct ieee_pfc *pfc)
+{
+	struct hwrm_queue_pfcenable_qcfg_output *resp;
+	struct hwrm_queue_pfcenable_qcfg_input *req;
+	u8 pri_mask;
+	int rc;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_PFCENABLE_QCFG);
+	if (rc)
+		return rc;
+
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send(bp, req);
+	if (rc) {
+		hwrm_req_drop(bp, req);
+		return rc;
+	}
+
+	pri_mask = le32_to_cpu(resp->flags);
+	pfc->pfc_en = pri_mask;
+	hwrm_req_drop(bp, req);
+	return 0;
+}
+
+static int bnxt_hwrm_set_dcbx_app(struct bnxt *bp, struct dcb_app *app,
+				  bool add)
+{
+	struct hwrm_fw_set_structured_data_input *set;
+	struct hwrm_fw_get_structured_data_input *get;
+	struct hwrm_struct_data_dcbx_app *fw_app;
+	struct hwrm_struct_hdr *data;
+	dma_addr_t mapping;
+	size_t data_len;
+	int rc, n, i;
+
+	if (bp->hwrm_spec_code < 0x10601)
+		return 0;
+
+	rc = hwrm_req_init(bp, get, HWRM_FW_GET_STRUCTURED_DATA);
+	if (rc)
+		return rc;
+
+	hwrm_req_hold(bp, get);
+	hwrm_req_alloc_flags(bp, get, GFP_KERNEL | __GFP_ZERO);
+
+	n = IEEE_8021QAZ_MAX_TCS;
+	data_len = sizeof(*data) + sizeof(*fw_app) * n;
+	data = hwrm_req_dma_slice(bp, get, data_len, &mapping);
+	if (!data) {
+		rc = -ENOMEM;
+		goto set_app_exit;
+	}
+
+	get->dest_data_addr = cpu_to_le64(mapping);
+	get->structure_id = cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP);
+	get->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
+	get->count = 0;
+	rc = hwrm_req_send(bp, get);
+	if (rc)
+		goto set_app_exit;
+
+	fw_app = (struct hwrm_struct_data_dcbx_app *)(data + 1);
+
+	if (data->struct_id != cpu_to_le16(STRUCT_HDR_STRUCT_ID_DCBX_APP)) {
+		rc = -ENODEV;
+		goto set_app_exit;
+	}
+
+	n = data->count;
+	for (i = 0; i < n; i++, fw_app++) {
+		if (fw_app->protocol_id == cpu_to_be16(app->protocol) &&
+		    fw_app->protocol_selector == app->selector &&
+		    fw_app->priority == app->priority) {
+			if (add)
+				goto set_app_exit;
+			else
+				break;
+		}
+	}
+	if (add) {
+		/* append */
+		n++;
+		fw_app->protocol_id = cpu_to_be16(app->protocol);
+		fw_app->protocol_selector = app->selector;
+		fw_app->priority = app->priority;
+		fw_app->valid = 1;
+	} else {
+		size_t len = 0;
+
+		/* not found, nothing to delete */
+		if (n == i)
+			goto set_app_exit;
+
+		len = (n - 1 - i) * sizeof(*fw_app);
+		if (len)
+			memmove(fw_app, fw_app + 1, len);
+		n--;
+		memset(fw_app + n, 0, sizeof(*fw_app));
+	}
+	data->count = n;
+	data->len = cpu_to_le16(sizeof(*fw_app) * n);
+	data->subtype = cpu_to_le16(HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL);
+
+	rc = hwrm_req_init(bp, set, HWRM_FW_SET_STRUCTURED_DATA);
+	if (rc)
+		goto set_app_exit;
+
+	set->src_data_addr = cpu_to_le64(mapping);
+	set->data_len = cpu_to_le16(sizeof(*data) + sizeof(*fw_app) * n);
+	set->hdr_cnt = 1;
+	rc = hwrm_req_send(bp, set);
+
+set_app_exit:
+	hwrm_req_drop(bp, get); /* dropping get request and associated slice */
+	return rc;
+}
+
+static int bnxt_hwrm_queue_dscp_qcaps(struct bnxt *bp)
+{
+	struct hwrm_queue_dscp_qcaps_output *resp;
+	struct hwrm_queue_dscp_qcaps_input *req;
+	int rc;
+
+	bp->max_dscp_value = 0;
+	if (bp->hwrm_spec_code < 0x10800 || BNXT_VF(bp))
+		return 0;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP_QCAPS);
+	if (rc)
+		return rc;
+
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send_silent(bp, req);
+	if (!rc) {
+		bp->max_dscp_value = (1 << resp->num_dscp_bits) - 1;
+		if (bp->max_dscp_value < 0x3f)
+			bp->max_dscp_value = 0;
+	}
+	hwrm_req_drop(bp, req);
+	return rc;
+}
+
+static int bnxt_hwrm_queue_dscp2pri_cfg(struct bnxt *bp, struct dcb_app *app,
+					bool add)
+{
+	struct hwrm_queue_dscp2pri_cfg_input *req;
+	struct bnxt_dscp2pri_entry *dscp2pri;
+	dma_addr_t mapping;
+	int rc;
+
+	if (bp->hwrm_spec_code < 0x10800)
+		return 0;
+
+	rc = hwrm_req_init(bp, req, HWRM_QUEUE_DSCP2PRI_CFG);
+	if (rc)
+		return rc;
+
+	dscp2pri = hwrm_req_dma_slice(bp, req, sizeof(*dscp2pri), &mapping);
+	if (!dscp2pri) {
+		hwrm_req_drop(bp, req);
+		return -ENOMEM;
+	}
+
+	req->src_data_addr = cpu_to_le64(mapping);
+	dscp2pri->dscp = app->protocol;
+	if (add)
+		dscp2pri->mask = 0x3f;
+	else
+		dscp2pri->mask = 0;
+	dscp2pri->pri = app->priority;
+	req->entry_cnt = cpu_to_le16(1);
+	rc = hwrm_req_send(bp, req);
+	return rc;
+}
+
+static int bnxt_ets_validate(struct bnxt *bp, struct ieee_ets *ets, u8 *tc)
+{
+	int total_ets_bw = 0;
+	bool zero = false;
+	u8 max_tc = 0;
+	int i;
+
+	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+		if (ets->prio_tc[i] > bp->max_tc) {
+			netdev_err(bp->dev, "priority to TC mapping exceeds TC count %d\n",
+				   ets->prio_tc[i]);
+			return -EINVAL;
+		}
+		if (ets->prio_tc[i] > max_tc)
+			max_tc = ets->prio_tc[i];
+
+		if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && i > bp->max_tc)
+			return -EINVAL;
+
+		switch (ets->tc_tsa[i]) {
+		case IEEE_8021QAZ_TSA_STRICT:
+			break;
+		case IEEE_8021QAZ_TSA_ETS:
+			total_ets_bw += ets->tc_tx_bw[i];
+			zero = zero || !ets->tc_tx_bw[i];
+			break;
+		default:
+			return -ENOTSUPP;
+		}
+	}
+	if (total_ets_bw > 100) {
+		netdev_warn(bp->dev, "rejecting ETS config exceeding available bandwidth\n");
+		return -EINVAL;
+	}
+	if (zero && total_ets_bw == 100) {
+		netdev_warn(bp->dev, "rejecting ETS config starving a TC\n");
+		return -EINVAL;
+	}
+
+	if (max_tc >= bp->max_tc)
+		*tc = bp->max_tc;
+	else
+		*tc = max_tc + 1;
+	return 0;
+}
+
+static int bnxt_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	struct ieee_ets *my_ets = bp->ieee_ets;
+	int rc;
+
+	ets->ets_cap = bp->max_tc;
+
+	if (!my_ets) {
+		if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
+			return 0;
+
+		my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
+		if (!my_ets)
+			return -ENOMEM;
+		rc = bnxt_hwrm_queue_cos2bw_qcfg(bp, my_ets);
+		if (rc)
+			goto error;
+		rc = bnxt_hwrm_queue_pri2cos_qcfg(bp, my_ets);
+		if (rc)
+			goto error;
+
+		/* cache result */
+		bp->ieee_ets = my_ets;
+	}
+
+	ets->cbs = my_ets->cbs;
+	memcpy(ets->tc_tx_bw, my_ets->tc_tx_bw, sizeof(ets->tc_tx_bw));
+	memcpy(ets->tc_rx_bw, my_ets->tc_rx_bw, sizeof(ets->tc_rx_bw));
+	memcpy(ets->tc_tsa, my_ets->tc_tsa, sizeof(ets->tc_tsa));
+	memcpy(ets->prio_tc, my_ets->prio_tc, sizeof(ets->prio_tc));
+	return 0;
+error:
+	kfree(my_ets);
+	return rc;
+}
+
+static int bnxt_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	struct ieee_ets *my_ets = bp->ieee_ets;
+	u8 max_tc = 0;
+	int rc, i;
+
+	if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
+	    !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
+		return -EINVAL;
+
+	rc = bnxt_ets_validate(bp, ets, &max_tc);
+	if (!rc) {
+		if (!my_ets) {
+			my_ets = kzalloc(sizeof(*my_ets), GFP_KERNEL);
+			if (!my_ets)
+				return -ENOMEM;
+			/* initialize PRI2TC mappings to invalid value */
+			for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
+				my_ets->prio_tc[i] = IEEE_8021QAZ_MAX_TCS;
+			bp->ieee_ets = my_ets;
+		}
+		rc = bnxt_setup_mq_tc(dev, max_tc);
+		if (rc)
+			return rc;
+		rc = bnxt_hwrm_queue_cos2bw_cfg(bp, ets, max_tc);
+		if (rc)
+			return rc;
+		rc = bnxt_hwrm_queue_pri2cos_cfg(bp, ets);
+		if (rc)
+			return rc;
+		memcpy(my_ets, ets, sizeof(*my_ets));
+	}
+	return rc;
+}
+
+static int bnxt_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	__le64 *stats = bp->port_stats.hw_stats;
+	struct ieee_pfc *my_pfc = bp->ieee_pfc;
+	long rx_off, tx_off;
+	int i, rc;
+
+	pfc->pfc_cap = bp->max_lltc;
+
+	if (!my_pfc) {
+		if (bp->dcbx_cap & DCB_CAP_DCBX_HOST)
+			return 0;
+
+		my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
+		if (!my_pfc)
+			return 0;
+		bp->ieee_pfc = my_pfc;
+		rc = bnxt_hwrm_queue_pfc_qcfg(bp, my_pfc);
+		if (rc)
+			return 0;
+	}
+
+	pfc->pfc_en = my_pfc->pfc_en;
+	pfc->mbc = my_pfc->mbc;
+	pfc->delay = my_pfc->delay;
+
+	if (!stats)
+		return 0;
+
+	rx_off = BNXT_RX_STATS_OFFSET(rx_pfc_ena_frames_pri0);
+	tx_off = BNXT_TX_STATS_OFFSET(tx_pfc_ena_frames_pri0);
+	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++, rx_off++, tx_off++) {
+		pfc->requests[i] = le64_to_cpu(*(stats + tx_off));
+		pfc->indications[i] = le64_to_cpu(*(stats + rx_off));
+	}
+
+	return 0;
+}
+
+static int bnxt_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	struct ieee_pfc *my_pfc = bp->ieee_pfc;
+	int rc;
+
+	if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
+	    !(bp->dcbx_cap & DCB_CAP_DCBX_HOST) ||
+	    (bp->phy_flags & BNXT_PHY_FL_NO_PAUSE))
+		return -EINVAL;
+
+	if (!my_pfc) {
+		my_pfc = kzalloc(sizeof(*my_pfc), GFP_KERNEL);
+		if (!my_pfc)
+			return -ENOMEM;
+		bp->ieee_pfc = my_pfc;
+	}
+	rc = bnxt_hwrm_queue_pfc_cfg(bp, pfc);
+	if (!rc)
+		memcpy(my_pfc, pfc, sizeof(*my_pfc));
+
+	return rc;
+}
+
+static int bnxt_dcbnl_ieee_dscp_app_prep(struct bnxt *bp, struct dcb_app *app)
+{
+	if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP) {
+		if (!bp->max_dscp_value)
+			return -ENOTSUPP;
+		if (app->protocol > bp->max_dscp_value)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static int bnxt_dcbnl_ieee_setapp(struct net_device *dev, struct dcb_app *app)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	int rc;
+
+	if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
+	    !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
+		return -EINVAL;
+
+	rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
+	if (rc)
+		return rc;
+
+	rc = dcb_ieee_setapp(dev, app);
+	if (rc)
+		return rc;
+
+	if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
+	     app->protocol == ETH_P_IBOE) ||
+	    (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
+	     app->protocol == ROCE_V2_UDP_DPORT))
+		rc = bnxt_hwrm_set_dcbx_app(bp, app, true);
+
+	if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
+		rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, true);
+
+	return rc;
+}
+
+static int bnxt_dcbnl_ieee_delapp(struct net_device *dev, struct dcb_app *app)
+{
+	struct bnxt *bp = netdev_priv(dev);
+	int rc;
+
+	if (!(bp->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
+	    !(bp->dcbx_cap & DCB_CAP_DCBX_HOST))
+		return -EINVAL;
+
+	rc = bnxt_dcbnl_ieee_dscp_app_prep(bp, app);
+	if (rc)
+		return rc;
+
+	rc = dcb_ieee_delapp(dev, app);
+	if (rc)
+		return rc;
+	if ((app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
+	     app->protocol == ETH_P_IBOE) ||
+	    (app->selector == IEEE_8021QAZ_APP_SEL_DGRAM &&
+	     app->protocol == ROCE_V2_UDP_DPORT))
+		rc = bnxt_hwrm_set_dcbx_app(bp, app, false);
+
+	if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
+		rc = bnxt_hwrm_queue_dscp2pri_cfg(bp, app, false);
+
+	return rc;
+}
+
+static u8 bnxt_dcbnl_getdcbx(struct net_device *dev)
+{
+	struct bnxt *bp = netdev_priv(dev);
+
+	return bp->dcbx_cap;
+}
+
+static u8 bnxt_dcbnl_setdcbx(struct net_device *dev, u8 mode)
+{
+	struct bnxt *bp = netdev_priv(dev);
+
+	/* All firmware DCBX settings are set in NVRAM */
+	if (bp->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
+		return 1;
+
+	if (mode & DCB_CAP_DCBX_HOST) {
+		if (BNXT_VF(bp) || (bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
+			return 1;
+
+		/* only support IEEE */
+		if ((mode & DCB_CAP_DCBX_VER_CEE) ||
+		    !(mode & DCB_CAP_DCBX_VER_IEEE))
+			return 1;
+	}
+
+	if (mode == bp->dcbx_cap)
+		return 0;
+
+	bp->dcbx_cap = mode;
+	return 0;
+}
+
+static const struct dcbnl_rtnl_ops dcbnl_ops = {
+	.ieee_getets	= bnxt_dcbnl_ieee_getets,
+	.ieee_setets	= bnxt_dcbnl_ieee_setets,
+	.ieee_getpfc	= bnxt_dcbnl_ieee_getpfc,
+	.ieee_setpfc	= bnxt_dcbnl_ieee_setpfc,
+	.ieee_setapp	= bnxt_dcbnl_ieee_setapp,
+	.ieee_delapp	= bnxt_dcbnl_ieee_delapp,
+	.getdcbx	= bnxt_dcbnl_getdcbx,
+	.setdcbx	= bnxt_dcbnl_setdcbx,
+};
+
+void bnxt_dcb_init(struct bnxt *bp)
+{
+	bp->dcbx_cap = 0;
+	if (bp->hwrm_spec_code < 0x10501)
+		return;
+
+	bnxt_hwrm_queue_dscp_qcaps(bp);
+	bp->dcbx_cap = DCB_CAP_DCBX_VER_IEEE;
+	if (BNXT_PF(bp) && !(bp->fw_cap & BNXT_FW_CAP_LLDP_AGENT))
+		bp->dcbx_cap |= DCB_CAP_DCBX_HOST;
+	else if (bp->fw_cap & BNXT_FW_CAP_DCBX_AGENT)
+		bp->dcbx_cap |= DCB_CAP_DCBX_LLD_MANAGED;
+	bp->dev->dcbnl_ops = &dcbnl_ops;
+}
+
+void bnxt_dcb_free(struct bnxt *bp)
+{
+	kfree(bp->ieee_pfc);
+	kfree(bp->ieee_ets);
+	bp->ieee_pfc = NULL;
+	bp->ieee_ets = NULL;
+}
+
+#else
+
+void bnxt_dcb_init(struct bnxt *bp)
+{
+}
+
+void bnxt_dcb_free(struct bnxt *bp)
+{
+}
+
+#endif