bnx2x: add VF Multicast filters support

This patch adds the necessary support for configuring (and removing) multicast
filters to VFs.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c

@@ -166,6 +166,7 @@ enum bnx2x_vfop_qteardown_state {
 	   BNX2X_VFOP_QTEARDOWN_RXMODE,
 	   BNX2X_VFOP_QTEARDOWN_CLR_VLAN,
 	   BNX2X_VFOP_QTEARDOWN_CLR_MAC,
+	   BNX2X_VFOP_QTEARDOWN_CLR_MCAST,
 	   BNX2X_VFOP_QTEARDOWN_QDTOR,
 	   BNX2X_VFOP_QTEARDOWN_DONE
 };
@@ -1112,7 +1113,10 @@ static void bnx2x_vfop_mcast(struct bnx2x *bp, struct bnx2x_virtf *vf)
 	switch (state) {
 	case BNX2X_VFOP_MCAST_DEL:
 		/* clear existing mcasts */
-		vfop->state = BNX2X_VFOP_MCAST_ADD;
+		vfop->state = (args->mc_num) ? BNX2X_VFOP_MCAST_ADD
+					     : BNX2X_VFOP_MCAST_CHK_DONE;
+		mcast->mcast_list_len = vf->mcast_list_len;
+		vf->mcast_list_len = args->mc_num;
 		vfop->rc = bnx2x_config_mcast(bp, mcast, BNX2X_MCAST_CMD_DEL);
 		bnx2x_vfop_finalize(vf, vfop->rc, VFOP_CONT);
 
@@ -1120,17 +1124,17 @@ static void bnx2x_vfop_mcast(struct bnx2x *bp, struct bnx2x_virtf *vf)
 		if (raw->check_pending(raw))
 			goto op_pending;
 
-		if (args->mc_num) {
 		/* update mcast list on the ramrod params */
 		INIT_LIST_HEAD(&mcast->mcast_list);
 		for (i = 0; i < args->mc_num; i++)
 			list_add_tail(&(args->mc[i].link),
 				      &mcast->mcast_list);
+		mcast->mcast_list_len = args->mc_num;
+
 		/* add new mcasts */
 		vfop->state = BNX2X_VFOP_MCAST_CHK_DONE;
 		vfop->rc = bnx2x_config_mcast(bp, mcast,
 					      BNX2X_MCAST_CMD_ADD);
-		}
 		bnx2x_vfop_finalize(vf, vfop->rc, VFOP_DONE);
 
 	case BNX2X_VFOP_MCAST_CHK_DONE:
@@ -1303,12 +1307,19 @@ static void bnx2x_vfop_qdown(struct bnx2x *bp, struct bnx2x_virtf *vf)
 
 	case BNX2X_VFOP_QTEARDOWN_CLR_MAC:
 		/* mac-clear-all: consume credit */
-		vfop->state = BNX2X_VFOP_QTEARDOWN_QDTOR;
+		vfop->state = BNX2X_VFOP_QTEARDOWN_CLR_MCAST;
 		vfop->rc = bnx2x_vfop_mac_delall_cmd(bp, vf, &cmd, qid, false);
 		if (vfop->rc)
 			goto op_err;
 		return;
 
+	case BNX2X_VFOP_QTEARDOWN_CLR_MCAST:
+		vfop->state = BNX2X_VFOP_QTEARDOWN_QDTOR;
+		vfop->rc = bnx2x_vfop_mcast_cmd(bp, vf, &cmd, NULL, 0, false);
+		if (vfop->rc)
+			goto op_err;
+		return;
+
 	case BNX2X_VFOP_QTEARDOWN_QDTOR:
 		/* run the queue destruction flow */
 		DP(BNX2X_MSG_IOV, "case: BNX2X_VFOP_QTEARDOWN_QDTOR\n");
@@ -2188,6 +2199,7 @@ int bnx2x_iov_nic_init(struct bnx2x *bp)
 		 *  It needs to be initialized here so that it can be safely
 		 *  handled by a subsequent FLR flow.
 		 */
+		vf->mcast_list_len = 0;
 		bnx2x_init_mcast_obj(bp, &vf->mcast_obj, 0xFF,
 				     0xFF, 0xFF, 0xFF,
 				     bnx2x_vf_sp(bp, vf, mcast_rdata),
@@ -2848,13 +2860,9 @@ static void bnx2x_vfop_close(struct bnx2x *bp, struct bnx2x_virtf *vf)
 				goto op_err;
 			return;
 		}
-
-		/* remove multicasts */
 		vfop->state = BNX2X_VFOP_CLOSE_HW;
-		vfop->rc = bnx2x_vfop_mcast_cmd(bp, vf, &cmd, NULL, 0, false);
-		if (vfop->rc)
-			goto op_err;
-		return;
+		vfop->rc = 0;
+		bnx2x_vfop_finalize(vf, vfop->rc, VFOP_CONT);
 
 	case BNX2X_VFOP_CLOSE_HW:
 
@@ -2888,6 +2896,9 @@ static void bnx2x_vfop_close(struct bnx2x *bp, struct bnx2x_virtf *vf)
 
 	DP(BNX2X_MSG_IOV, "set state to acquired\n");
 	bnx2x_vfop_end(bp, vf, vfop);
+op_pending:
+	/* Not supported at the moment; Exists for macros only */
+	return;
 }
 
 int bnx2x_vfop_close_cmd(struct bnx2x *bp,

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h

@@ -268,6 +268,7 @@ struct bnx2x_virtf {
 	int leading_rss;
 
 	/* MCAST object */
+	int mcast_list_len;
 	struct bnx2x_mcast_obj		mcast_obj;
 
 	/* RSS configuration object */

drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c

@@ -1420,6 +1420,14 @@ static void bnx2x_vf_mbx_setup_q(struct bnx2x *bp, struct bnx2x_virtf *vf,
 				setup_q->rxq.cache_line_log;
 			rxq_params->sb_cq_index = setup_q->rxq.sb_index;
 
+			/* rx setup - multicast engine */
+			if (bnx2x_vfq_is_leading(q)) {
+				u8 mcast_id = FW_VF_HANDLE(vf->abs_vfid);
+
+				rxq_params->mcast_engine_id = mcast_id;
+				__set_bit(BNX2X_Q_FLG_MCAST, &setup_p->flags);
+			}
+
 			bnx2x_vfop_qctor_dump_rx(bp, vf, init_p, setup_p,
 						 q->index, q->sb_idx);
 		}