Merge branch 'thunderx-DMAC-filtering'

Vadim Lomovtsev says:

====================
net: thunderx: implement DMAC filtering support

By default CN88XX BGX accepts all incoming multicast and broadcast
packets and filtering is disabled. The nic driver doesn't provide
an ability to change such behaviour.

This series is to implement DMAC filtering management for CN88XX
nic driver allowing user to enable/disable filtering and configure
specific MAC addresses to filter traffic.

Changes from v1:
build issues:
 - update code in order to address compiler warnings;
checkpatch.pl reported issues:
 - update code in order to fit 80 symbols length;
 - update commit descriptions in order to fit 80 symbols length;
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 374 insertions, 30 deletions

diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h
index 4cacce5d2b16..5fc46c5a4f36 100644
--- a/drivers/net/ethernet/cavium/thunder/nic.h
+++ b/drivers/net/ethernet/cavium/thunder/nic.h
@@ -265,6 +265,22 @@ struct nicvf_drv_stats {
 
 struct cavium_ptp;
 
+struct xcast_addr {
+	struct list_head list;
+	u64              addr;
+};
+
+struct xcast_addr_list {
+	struct list_head list;
+	int              count;
+};
+
+struct nicvf_work {
+	struct delayed_work    work;
+	u8                     mode;
+	struct xcast_addr_list *mc;
+};
+
 struct nicvf {
 	struct nicvf		*pnicvf;
 	struct net_device	*netdev;
@@ -313,6 +329,7 @@ struct nicvf {
 	struct nicvf_pfc	pfc;
 	struct tasklet_struct	qs_err_task;
 	struct work_struct	reset_task;
+	struct nicvf_work       rx_mode_work;
 
 	/* PTP timestamp */
 	struct cavium_ptp	*ptp_clock;
@@ -403,6 +420,9 @@ struct nicvf {
 #define	NIC_MBOX_MSG_PTP_CFG		0x19	/* HW packet timestamp */
 #define	NIC_MBOX_MSG_CFG_DONE		0xF0	/* VF configuration done */
 #define	NIC_MBOX_MSG_SHUTDOWN		0xF1	/* VF is being shutdown */
+#define	NIC_MBOX_MSG_RESET_XCAST	0xF2    /* Reset DCAM filtering mode */
+#define	NIC_MBOX_MSG_ADD_MCAST		0xF3    /* Add MAC to DCAM filters */
+#define	NIC_MBOX_MSG_SET_XCAST		0xF4    /* Set MCAST/BCAST RX mode */
 
 struct nic_cfg_msg {
 	u8    msg;
@@ -556,6 +576,14 @@ struct set_ptp {
 	bool  enable;
 };
 
+struct xcast {
+	u8    msg;
+	union {
+		u8    mode;
+		u64   mac;
+	} data;
+};
+
 /* 128 bit shared memory between PF and each VF */
 union nic_mbx {
 	struct { u8 msg; }	msg;
@@ -576,6 +604,7 @@ union nic_mbx {
 	struct reset_stat_cfg	reset_stat;
 	struct pfc		pfc;
 	struct set_ptp		ptp;
+	struct xcast            xcast;
 };
 
 #define NIC_NODE_ID_MASK	0x03
diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index 7ff66a8194e2..55af04fa03a7 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -21,6 +21,8 @@
 #define DRV_NAME	"nicpf"
 #define DRV_VERSION	"1.0"
 
+#define NIC_VF_PER_MBX_REG      64
+
 struct hw_info {
 	u8		bgx_cnt;
 	u8		chans_per_lmac;
@@ -1072,6 +1074,40 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
 	case NIC_MBOX_MSG_PTP_CFG:
 		nic_config_timestamp(nic, vf, &mbx.ptp);
 		break;
+	case NIC_MBOX_MSG_RESET_XCAST:
+		if (vf >= nic->num_vf_en) {
+			ret = -1; /* NACK */
+			break;
+		}
+		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		bgx_reset_xcast_mode(nic->node, bgx, lmac,
+				     vf < NIC_VF_PER_MBX_REG ? vf :
+				     vf - NIC_VF_PER_MBX_REG);
+		break;
+
+	case NIC_MBOX_MSG_ADD_MCAST:
+		if (vf >= nic->num_vf_en) {
+			ret = -1; /* NACK */
+			break;
+		}
+		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		bgx_set_dmac_cam_filter(nic->node, bgx, lmac,
+					mbx.xcast.data.mac,
+					vf < NIC_VF_PER_MBX_REG ? vf :
+					vf - NIC_VF_PER_MBX_REG);
+		break;
+
+	case NIC_MBOX_MSG_SET_XCAST:
+		if (vf >= nic->num_vf_en) {
+			ret = -1; /* NACK */
+			break;
+		}
+		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		bgx_set_xcast_mode(nic->node, bgx, lmac, mbx.xcast.data.mode);
+		break;
 	default:
 		dev_err(&nic->pdev->dev,
 			"Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg);
@@ -1094,7 +1130,7 @@ static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)
 	struct nicpf *nic = (struct nicpf *)nic_irq;
 	int mbx;
 	u64 intr;
-	u8  vf, vf_per_mbx_reg = 64;
+	u8  vf;
 
 	if (irq == pci_irq_vector(nic->pdev, NIC_PF_INTR_ID_MBOX0))
 		mbx = 0;
@@ -1103,12 +1139,13 @@ static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)
 
 	intr = nic_reg_read(nic, NIC_PF_MAILBOX_INT + (mbx << 3));
 	dev_dbg(&nic->pdev->dev, "PF interrupt Mbox%d 0x%llx\n", mbx, intr);
-	for (vf = 0; vf < vf_per_mbx_reg; vf++) {
+	for (vf = 0; vf < NIC_VF_PER_MBX_REG; vf++) {
 		if (intr & (1ULL << vf)) {
 			dev_dbg(&nic->pdev->dev, "Intr from VF %d\n",
-				vf + (mbx * vf_per_mbx_reg));
+				vf + (mbx * NIC_VF_PER_MBX_REG));
 
-			nic_handle_mbx_intr(nic, vf + (mbx * vf_per_mbx_reg));
+			nic_handle_mbx_intr(nic, vf +
+					    (mbx * NIC_VF_PER_MBX_REG));
 			nic_clear_mbx_intr(nic, vf, mbx);
 		}
 	}
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 73fe3881414b..1e9a31fef729 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -21,6 +21,7 @@
 #include <linux/bpf_trace.h>
 #include <linux/filter.h>
 #include <linux/net_tstamp.h>
+#include <linux/workqueue.h>
 
 #include "nic_reg.h"
 #include "nic.h"
@@ -67,6 +68,9 @@ module_param(cpi_alg, int, 0444);
 MODULE_PARM_DESC(cpi_alg,
 		 "PFC algorithm (0=none, 1=VLAN, 2=VLAN16, 3=IP Diffserv)");
 
+/* workqueue for handling kernel ndo_set_rx_mode() calls */
+static struct workqueue_struct *nicvf_rx_mode_wq;
+
 static inline u8 nicvf_netdev_qidx(struct nicvf *nic, u8 qidx)
 {
 	if (nic->sqs_mode)
@@ -1919,6 +1923,100 @@ static int nicvf_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
 	}
 }
 
+static void nicvf_set_rx_mode_task(struct work_struct *work_arg)
+{
+	struct nicvf_work *vf_work = container_of(work_arg, struct nicvf_work,
+						  work.work);
+	struct nicvf *nic = container_of(vf_work, struct nicvf, rx_mode_work);
+	union nic_mbx mbx = {};
+	struct xcast_addr *xaddr, *next;
+
+	if (!vf_work)
+		return;
+
+	/* From the inside of VM code flow we have only 128 bits memory
+	 * available to send message to host's PF, so send all mc addrs
+	 * one by one, starting from flush command in case if kernel
+	 * requests to configure specific MAC filtering
+	 */
+
+	/* flush DMAC filters and reset RX mode */
+	mbx.xcast.msg = NIC_MBOX_MSG_RESET_XCAST;
+	nicvf_send_msg_to_pf(nic, &mbx);
+
+	if (vf_work->mode & BGX_XCAST_MCAST_FILTER) {
+		/* once enabling filtering, we need to signal to PF to add
+		 * its' own LMAC to the filter to accept packets for it.
+		 */
+		mbx.xcast.msg = NIC_MBOX_MSG_ADD_MCAST;
+		mbx.xcast.data.mac = 0;
+		nicvf_send_msg_to_pf(nic, &mbx);
+	}
+
+	/* check if we have any specific MACs to be added to PF DMAC filter */
+	if (vf_work->mc) {
+		/* now go through kernel list of MACs and add them one by one */
+		list_for_each_entry_safe(xaddr, next,
+					 &vf_work->mc->list, list) {
+			mbx.xcast.msg = NIC_MBOX_MSG_ADD_MCAST;
+			mbx.xcast.data.mac = xaddr->addr;
+			nicvf_send_msg_to_pf(nic, &mbx);
+
+			/* after receiving ACK from PF release memory */
+			list_del(&xaddr->list);
+			kfree(xaddr);
+			vf_work->mc->count--;
+		}
+		kfree(vf_work->mc);
+	}
+
+	/* and finally set rx mode for PF accordingly */
+	mbx.xcast.msg = NIC_MBOX_MSG_SET_XCAST;
+	mbx.xcast.data.mode = vf_work->mode;
+
+	nicvf_send_msg_to_pf(nic, &mbx);
+}
+
+static void nicvf_set_rx_mode(struct net_device *netdev)
+{
+	struct nicvf *nic = netdev_priv(netdev);
+	struct netdev_hw_addr *ha;
+	struct xcast_addr_list *mc_list = NULL;
+	u8 mode = 0;
+
+	if (netdev->flags & IFF_PROMISC) {
+		mode = BGX_XCAST_BCAST_ACCEPT | BGX_XCAST_MCAST_ACCEPT;
+	} else {
+		if (netdev->flags & IFF_BROADCAST)
+			mode |= BGX_XCAST_BCAST_ACCEPT;
+
+		if (netdev->flags & IFF_ALLMULTI) {
+			mode |= BGX_XCAST_MCAST_ACCEPT;
+		} else if (netdev->flags & IFF_MULTICAST) {
+			mode |= BGX_XCAST_MCAST_FILTER;
+			/* here we need to copy mc addrs */
+			if (netdev_mc_count(netdev)) {
+				struct xcast_addr *xaddr;
+
+				mc_list = kmalloc(sizeof(*mc_list), GFP_ATOMIC);
+				INIT_LIST_HEAD(&mc_list->list);
+				netdev_hw_addr_list_for_each(ha, &netdev->mc) {
+					xaddr = kmalloc(sizeof(*xaddr),
+							GFP_ATOMIC);
+					xaddr->addr =
+						ether_addr_to_u64(ha->addr);
+					list_add_tail(&xaddr->list,
+						      &mc_list->list);
+					mc_list->count++;
+				}
+			}
+		}
+	}
+	nic->rx_mode_work.mc = mc_list;
+	nic->rx_mode_work.mode = mode;
+	queue_delayed_work(nicvf_rx_mode_wq, &nic->rx_mode_work.work, 2 * HZ);
+}
+
 static const struct net_device_ops nicvf_netdev_ops = {
 	.ndo_open		= nicvf_open,
 	.ndo_stop		= nicvf_stop,
@@ -1931,6 +2029,7 @@ static const struct net_device_ops nicvf_netdev_ops = {
 	.ndo_set_features       = nicvf_set_features,
 	.ndo_bpf		= nicvf_xdp,
 	.ndo_do_ioctl           = nicvf_ioctl,
+	.ndo_set_rx_mode        = nicvf_set_rx_mode,
 };
 
 static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
@@ -2071,6 +2170,8 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	INIT_WORK(&nic->reset_task, nicvf_reset_task);
 
+	INIT_DELAYED_WORK(&nic->rx_mode_work.work, nicvf_set_rx_mode_task);
+
 	err = register_netdev(netdev);
 	if (err) {
 		dev_err(dev, "Failed to register netdevice\n");
@@ -2109,6 +2210,8 @@ static void nicvf_remove(struct pci_dev *pdev)
 	nic = netdev_priv(netdev);
 	pnetdev = nic->pnicvf->netdev;
 
+	cancel_delayed_work_sync(&nic->rx_mode_work.work);
+
 	/* Check if this Qset is assigned to different VF.
 	 * If yes, clean primary and all secondary Qsets.
 	 */
@@ -2140,12 +2243,17 @@ static struct pci_driver nicvf_driver = {
 static int __init nicvf_init_module(void)
 {
 	pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION);
-
+	nicvf_rx_mode_wq = alloc_ordered_workqueue("nicvf_generic",
+						   WQ_MEM_RECLAIM);
 	return pci_register_driver(&nicvf_driver);
 }
 
 static void __exit nicvf_cleanup_module(void)
 {
+	if (nicvf_rx_mode_wq) {
+		destroy_workqueue(nicvf_rx_mode_wq);
+		nicvf_rx_mode_wq = NULL;
+	}
 	pci_unregister_driver(&nicvf_driver);
 }
 
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 91d34ea40e2c..5d08d2aeb172 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -24,9 +24,31 @@
 #define DRV_NAME	"thunder_bgx"
 #define DRV_VERSION	"1.0"
 
+/* RX_DMAC_CTL configuration */
+enum MCAST_MODE {
+		MCAST_MODE_REJECT = 0x0,
+		MCAST_MODE_ACCEPT = 0x1,
+		MCAST_MODE_CAM_FILTER = 0x2,
+		RSVD = 0x3
+};
+
+#define BCAST_ACCEPT      BIT(0)
+#define CAM_ACCEPT        BIT(3)
+#define MCAST_MODE_MASK   0x3
+#define BGX_MCAST_MODE(x) (x << 1)
+
+struct dmac_map {
+	u64                     vf_map;
+	u64                     dmac;
+};
+
 struct lmac {
 	struct bgx		*bgx;
-	int			dmac;
+	/* actual number of DMACs configured */
+	u8			dmacs_cfg;
+	/* overal number of possible DMACs could be configured per LMAC */
+	u8                      dmacs_count;
+	struct dmac_map         *dmacs; /* DMAC:VFs tracking filter array */
 	u8			mac[ETH_ALEN];
 	u8                      lmac_type;
 	u8                      lane_to_sds;
@@ -223,6 +245,163 @@ void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
 }
 EXPORT_SYMBOL(bgx_set_lmac_mac);
 
+static void bgx_flush_dmac_cam_filter(struct bgx *bgx, int lmacid)
+{
+	struct lmac *lmac = NULL;
+	u8  idx = 0;
+
+	lmac = &bgx->lmac[lmacid];
+	/* reset CAM filters */
+	for (idx = 0; idx < lmac->dmacs_count; idx++)
+		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +
+			      ((lmacid * lmac->dmacs_count) + idx) *
+			      sizeof(u64), 0);
+}
+
+static void bgx_lmac_remove_filters(struct lmac *lmac, u8 vf_id)
+{
+	int i = 0;
+
+	if (!lmac)
+		return;
+
+	/* We've got reset filters request from some of attached VF, while the
+	 * others might want to keep their configuration. So in this case lets
+	 * iterate over all of configured filters and decrease number of
+	 * referencies. if some addresses get zero refs remove them from list
+	 */
+	for (i = lmac->dmacs_cfg - 1; i >= 0; i--) {
+		lmac->dmacs[i].vf_map &= ~BIT_ULL(vf_id);
+		if (!lmac->dmacs[i].vf_map) {
+			lmac->dmacs_cfg--;
+			lmac->dmacs[i].dmac = 0;
+			lmac->dmacs[i].vf_map = 0;
+		}
+	}
+}
+
+static int bgx_lmac_save_filter(struct lmac *lmac, u64 dmac, u8 vf_id)
+{
+	u8 i = 0;
+
+	if (!lmac)
+		return -1;
+
+	/* At the same time we could have several VFs 'attached' to some
+	 * particular LMAC, and each VF is represented as network interface
+	 * for kernel. So from user perspective it should be possible to
+	 * manipulate with its' (VF) receive modes. However from PF
+	 * driver perspective we need to keep track of filter configurations
+	 * for different VFs to prevent filter values dupes
+	 */
+	for (i = 0; i < lmac->dmacs_cfg; i++) {
+		if (lmac->dmacs[i].dmac == dmac) {
+			lmac->dmacs[i].vf_map |= BIT_ULL(vf_id);
+			return -1;
+		}
+	}
+
+	if (!(lmac->dmacs_cfg < lmac->dmacs_count))
+		return -1;
+
+	/* keep it for further tracking */
+	lmac->dmacs[lmac->dmacs_cfg].dmac = dmac;
+	lmac->dmacs[lmac->dmacs_cfg].vf_map = BIT_ULL(vf_id);
+	lmac->dmacs_cfg++;
+	return 0;
+}
+
+static int bgx_set_dmac_cam_filter_mac(struct bgx *bgx, int lmacid,
+				       u64 cam_dmac, u8 idx)
+{
+	struct lmac *lmac = NULL;
+	u64 cfg = 0;
+
+	/* skip zero addresses as meaningless */
+	if (!cam_dmac || !bgx)
+		return -1;
+
+	lmac = &bgx->lmac[lmacid];
+
+	/* configure DCAM filtering for designated LMAC */
+	cfg = RX_DMACX_CAM_LMACID(lmacid & LMAC_ID_MASK) |
+		RX_DMACX_CAM_EN | cam_dmac;
+	bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +
+		      ((lmacid * lmac->dmacs_count) + idx) * sizeof(u64), cfg);
+	return 0;
+}
+
+void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid,
+			     u64 cam_dmac, u8 vf_id)
+{
+	struct bgx *bgx = get_bgx(node, bgx_idx);
+	struct lmac *lmac = NULL;
+
+	if (!bgx)
+		return;
+
+	lmac = &bgx->lmac[lmacid];
+
+	if (!cam_dmac)
+		cam_dmac = ether_addr_to_u64(lmac->mac);
+
+	/* since we might have several VFs attached to particular LMAC
+	 * and kernel could call mcast config for each of them with the
+	 * same MAC, check if requested MAC is already in filtering list and
+	 * updare/prepare list of MACs to be applied later to HW filters
+	 */
+	bgx_lmac_save_filter(lmac, cam_dmac, vf_id);
+}
+EXPORT_SYMBOL(bgx_set_dmac_cam_filter);
+
+void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode)
+{
+	struct bgx *bgx = get_bgx(node, bgx_idx);
+	struct lmac *lmac = NULL;
+	u64 cfg = 0;
+	u8 i = 0;
+
+	if (!bgx)
+		return;
+
+	lmac = &bgx->lmac[lmacid];
+
+	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL);
+	if (mode & BGX_XCAST_BCAST_ACCEPT)
+		cfg |= BCAST_ACCEPT;
+	else
+		cfg &= ~BCAST_ACCEPT;
+
+	/* disable all MCASTs and DMAC filtering */
+	cfg &= ~(CAM_ACCEPT | BGX_MCAST_MODE(MCAST_MODE_MASK));
+
+	/* check requested bits and set filtergin mode appropriately */
+	if (mode & (BGX_XCAST_MCAST_ACCEPT)) {
+		cfg |= (BGX_MCAST_MODE(MCAST_MODE_ACCEPT));
+	} else if (mode & BGX_XCAST_MCAST_FILTER) {
+		cfg |= (BGX_MCAST_MODE(MCAST_MODE_CAM_FILTER) | CAM_ACCEPT);
+		for (i = 0; i < lmac->dmacs_cfg; i++)
+			bgx_set_dmac_cam_filter_mac(bgx, lmacid,
+						    lmac->dmacs[i].dmac, i);
+	}
+	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, cfg);
+}
+EXPORT_SYMBOL(bgx_set_xcast_mode);
+
+void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf_id)
+{
+	struct bgx *bgx = get_bgx(node, bgx_idx);
+
+	if (!bgx)
+		return;
+
+	bgx_lmac_remove_filters(&bgx->lmac[lmacid], vf_id);
+	bgx_flush_dmac_cam_filter(bgx, lmacid);
+	bgx_set_xcast_mode(node, bgx_idx, lmacid,
+			   (BGX_XCAST_BCAST_ACCEPT | BGX_XCAST_MCAST_ACCEPT));
+}
+EXPORT_SYMBOL(bgx_reset_xcast_mode);
+
 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
 {
 	struct bgx *bgx = get_bgx(node, bgx_idx);
@@ -468,18 +647,6 @@ u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx)
 }
 EXPORT_SYMBOL(bgx_get_tx_stats);
 
-static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac)
-{
-	u64 offset;
-
-	while (bgx->lmac[lmac].dmac > 0) {
-		offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) +
-			(lmac * MAX_DMAC_PER_LMAC * sizeof(u64));
-		bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0);
-		bgx->lmac[lmac].dmac--;
-	}
-}
-
 /* Configure BGX LMAC in internal loopback mode */
 void bgx_lmac_internal_loopback(int node, int bgx_idx,
 				int lmac_idx, bool enable)
@@ -912,6 +1079,11 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
 		bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4);
 	}
 
+	/* actual number of filters available to exact LMAC */
+	lmac->dmacs_count = (RX_DMAC_COUNT / bgx->lmac_count);
+	lmac->dmacs = kcalloc(lmac->dmacs_count, sizeof(*lmac->dmacs),
+			      GFP_KERNEL);
+
 	/* Enable lmac */
 	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
 
@@ -998,7 +1170,8 @@ static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
 	cfg &= ~CMR_EN;
 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
 
-	bgx_flush_dmac_addrs(bgx, lmacid);
+	bgx_flush_dmac_cam_filter(bgx, lmacid);
+	kfree(lmac->dmacs);
 
 	if ((lmac->lmac_type != BGX_MODE_XFI) &&
 	    (lmac->lmac_type != BGX_MODE_XLAUI) &&
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
index 5a7567d31138..cbdd20b9ee6f 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
@@ -30,6 +30,7 @@
 #define    DEFAULT_PAUSE_TIME			0xFFFF
 
 #define	   BGX_ID_MASK				0x3
+#define	   LMAC_ID_MASK				0x3
 
 #define    MAX_DMAC_PER_LMAC_TNS_BYPASS_MODE	2
 
@@ -57,7 +58,7 @@
 #define BGX_CMRX_RX_FIFO_LEN		0x108
 #define BGX_CMR_RX_DMACX_CAM		0x200
 #define  RX_DMACX_CAM_EN			BIT_ULL(48)
-#define  RX_DMACX_CAM_LMACID(x)			(x << 49)
+#define  RX_DMACX_CAM_LMACID(x)			(((u64)x) << 49)
 #define  RX_DMAC_COUNT				32
 #define BGX_CMR_RX_STREERING		0x300
 #define  RX_TRAFFIC_STEER_RULE_COUNT		8
@@ -205,17 +206,13 @@
 #define LMAC_INTR_LINK_UP	BIT(0)
 #define LMAC_INTR_LINK_DOWN	BIT(1)
 
-/*  RX_DMAC_CTL configuration*/
-enum MCAST_MODE {
-		MCAST_MODE_REJECT,
-		MCAST_MODE_ACCEPT,
-		MCAST_MODE_CAM_FILTER,
-		RSVD
-};
-
-#define BCAST_ACCEPT	1
-#define CAM_ACCEPT	1
+#define BGX_XCAST_BCAST_ACCEPT  BIT(0)
+#define BGX_XCAST_MCAST_ACCEPT  BIT(1)
+#define BGX_XCAST_MCAST_FILTER  BIT(2)
 
+void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid, u64 mac, u8 vf);
+void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf);
+void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode);
 void octeon_mdiobus_force_mod_depencency(void);
 void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable);
 void bgx_add_dmac_addr(u64 dmac, int node, int bgx_idx, int lmac);