bnxt_en: Refactor L2 filter alloc/free firmware commands.

Refactor the L2 filter alloc/free logic so that these filters can be
added/deleted by the user.

The bp->ntp_fltr_bmap allocated size is also increased to allow enough
IDs for L2 filters.
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -4834,7 +4834,7 @@ static int bnxt_alloc_ntp_fltrs(struct bnxt *bp)
 		INIT_HLIST_HEAD(&bp->ntp_fltr_hash_tbl[i]);
 
 	bp->ntp_fltr_count = 0;
-	bp->ntp_fltr_bmap = bitmap_zalloc(BNXT_NTP_FLTR_MAX_FLTR, GFP_KERNEL);
+	bp->ntp_fltr_bmap = bitmap_zalloc(BNXT_MAX_FLTR, GFP_KERNEL);
 
 	if (!bp->ntp_fltr_bmap)
 		rc = -ENOMEM;
@@ -5396,6 +5396,15 @@ static int bnxt_init_l2_filter(struct bnxt *bp, struct bnxt_l2_filter *fltr,
 	ether_addr_copy(fltr->l2_key.dst_mac_addr, key->dst_mac_addr);
 	fltr->l2_key.vlan = key->vlan;
 	fltr->base.type = BNXT_FLTR_TYPE_L2;
+	if (fltr->base.flags) {
+		int bit_id;
+
+		bit_id = bitmap_find_free_region(bp->ntp_fltr_bmap,
+						 BNXT_MAX_FLTR, 0);
+		if (bit_id < 0)
+			return -ENOMEM;
+		fltr->base.sw_id = (u16)bit_id;
+	}
 	head = &bp->l2_fltr_hash_tbl[idx];
 	hlist_add_head_rcu(&fltr->base.hash, head);
 	atomic_set(&fltr->refcnt, 1);
@@ -5429,6 +5438,96 @@ static struct bnxt_l2_filter *bnxt_alloc_l2_filter(struct bnxt *bp,
 	return fltr;
 }
 
+static u16 bnxt_vf_target_id(struct bnxt_pf_info *pf, u16 vf_idx)
+{
+#ifdef CONFIG_BNXT_SRIOV
+	struct bnxt_vf_info *vf = &pf->vf[vf_idx];
+
+	return vf->fw_fid;
+#else
+	return INVALID_HW_RING_ID;
+#endif
+}
+
+int bnxt_hwrm_l2_filter_free(struct bnxt *bp, struct bnxt_l2_filter *fltr)
+{
+	struct hwrm_cfa_l2_filter_free_input *req;
+	u16 target_id = 0xffff;
+	int rc;
+
+	if (fltr->base.flags & BNXT_ACT_FUNC_DST) {
+		struct bnxt_pf_info *pf = &bp->pf;
+
+		if (fltr->base.vf_idx >= pf->active_vfs)
+			return -EINVAL;
+
+		target_id = bnxt_vf_target_id(pf, fltr->base.vf_idx);
+		if (target_id == INVALID_HW_RING_ID)
+			return -EINVAL;
+	}
+
+	rc = hwrm_req_init(bp, req, HWRM_CFA_L2_FILTER_FREE);
+	if (rc)
+		return rc;
+
+	req->target_id = cpu_to_le16(target_id);
+	req->l2_filter_id = fltr->base.filter_id;
+	return hwrm_req_send(bp, req);
+}
+
+int bnxt_hwrm_l2_filter_alloc(struct bnxt *bp, struct bnxt_l2_filter *fltr)
+{
+	struct hwrm_cfa_l2_filter_alloc_output *resp;
+	struct hwrm_cfa_l2_filter_alloc_input *req;
+	u16 target_id = 0xffff;
+	int rc;
+
+	if (fltr->base.flags & BNXT_ACT_FUNC_DST) {
+		struct bnxt_pf_info *pf = &bp->pf;
+
+		if (fltr->base.vf_idx >= pf->active_vfs)
+			return -EINVAL;
+
+		target_id = bnxt_vf_target_id(pf, fltr->base.vf_idx);
+	}
+	rc = hwrm_req_init(bp, req, HWRM_CFA_L2_FILTER_ALLOC);
+	if (rc)
+		return rc;
+
+	req->target_id = cpu_to_le16(target_id);
+	req->flags = cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_FLAGS_PATH_RX);
+
+	if (!BNXT_CHIP_TYPE_NITRO_A0(bp))
+		req->flags |=
+			cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_FLAGS_OUTERMOST);
+	req->dst_id = cpu_to_le16(fltr->base.fw_vnic_id);
+	req->enables =
+		cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_ADDR |
+			    CFA_L2_FILTER_ALLOC_REQ_ENABLES_DST_ID |
+			    CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_ADDR_MASK);
+	ether_addr_copy(req->l2_addr, fltr->l2_key.dst_mac_addr);
+	eth_broadcast_addr(req->l2_addr_mask);
+
+	if (fltr->l2_key.vlan) {
+		req->enables |=
+			cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_IVLAN |
+				CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_IVLAN_MASK |
+				CFA_L2_FILTER_ALLOC_REQ_ENABLES_NUM_VLANS);
+		req->num_vlans = 1;
+		req->l2_ivlan = cpu_to_le16(fltr->l2_key.vlan);
+		req->l2_ivlan_mask = cpu_to_le16(0xfff);
+	}
+
+	resp = hwrm_req_hold(bp, req);
+	rc = hwrm_req_send(bp, req);
+	if (!rc) {
+		fltr->base.filter_id = resp->l2_filter_id;
+		set_bit(BNXT_FLTR_VALID, &fltr->base.state);
+	}
+	hwrm_req_drop(bp, req);
+	return rc;
+}
+
 #ifdef CONFIG_RFS_ACCEL
 static int bnxt_hwrm_cfa_ntuple_filter_free(struct bnxt *bp,
 					    struct bnxt_ntuple_filter *fltr)
@@ -5538,8 +5637,6 @@ static int bnxt_hwrm_cfa_ntuple_filter_alloc(struct bnxt *bp,
 static int bnxt_hwrm_set_vnic_filter(struct bnxt *bp, u16 vnic_id, u16 idx,
 				     const u8 *mac_addr)
 {
-	struct hwrm_cfa_l2_filter_alloc_output *resp;
-	struct hwrm_cfa_l2_filter_alloc_input *req;
 	struct bnxt_l2_filter *fltr;
 	struct bnxt_l2_key key;
 	int rc;
@@ -5550,66 +5647,33 @@ static int bnxt_hwrm_set_vnic_filter(struct bnxt *bp, u16 vnic_id, u16 idx,
 	if (IS_ERR(fltr))
 		return PTR_ERR(fltr);
 
-	rc = hwrm_req_init(bp, req, HWRM_CFA_L2_FILTER_ALLOC);
+	fltr->base.fw_vnic_id = bp->vnic_info[vnic_id].fw_vnic_id;
+	rc = bnxt_hwrm_l2_filter_alloc(bp, fltr);
 	if (rc)
-		return rc;
-
-	req->flags = cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_FLAGS_PATH_RX);
-	if (!BNXT_CHIP_TYPE_NITRO_A0(bp))
-		req->flags |=
-			cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_FLAGS_OUTERMOST);
-	req->dst_id = cpu_to_le16(bp->vnic_info[vnic_id].fw_vnic_id);
-	req->enables =
-		cpu_to_le32(CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_ADDR |
-			    CFA_L2_FILTER_ALLOC_REQ_ENABLES_DST_ID |
-			    CFA_L2_FILTER_ALLOC_REQ_ENABLES_L2_ADDR_MASK);
-	memcpy(req->l2_addr, mac_addr, ETH_ALEN);
-	req->l2_addr_mask[0] = 0xff;
-	req->l2_addr_mask[1] = 0xff;
-	req->l2_addr_mask[2] = 0xff;
-	req->l2_addr_mask[3] = 0xff;
-	req->l2_addr_mask[4] = 0xff;
-	req->l2_addr_mask[5] = 0xff;
-
-	resp = hwrm_req_hold(bp, req);
-	rc = hwrm_req_send(bp, req);
-	if (rc) {
 		bnxt_del_l2_filter(bp, fltr);
-	} else {
-		fltr->base.filter_id = resp->l2_filter_id;
-		set_bit(BNXT_FLTR_VALID, &fltr->base.state);
+	else
 		bp->vnic_info[vnic_id].l2_filters[idx] = fltr;
-	}
-	hwrm_req_drop(bp, req);
 	return rc;
 }
 
 static int bnxt_hwrm_clear_vnic_filter(struct bnxt *bp)
 {
-	struct hwrm_cfa_l2_filter_free_input *req;
 	u16 i, j, num_of_vnics = 1; /* only vnic 0 supported */
-	int rc;
+	int rc = 0;
 
 	/* Any associated ntuple filters will also be cleared by firmware. */
-	rc = hwrm_req_init(bp, req, HWRM_CFA_L2_FILTER_FREE);
-	if (rc)
-		return rc;
-	hwrm_req_hold(bp, req);
 	for (i = 0; i < num_of_vnics; i++) {
 		struct bnxt_vnic_info *vnic = &bp->vnic_info[i];
 
 		for (j = 0; j < vnic->uc_filter_count; j++) {
-			struct bnxt_l2_filter *fltr;
-
-			fltr = vnic->l2_filters[j];
-			req->l2_filter_id = fltr->base.filter_id;
+			struct bnxt_l2_filter *fltr = vnic->l2_filters[j];
 
-			rc = hwrm_req_send(bp, req);
+			bnxt_hwrm_l2_filter_free(bp, fltr);
 			bnxt_del_l2_filter(bp, fltr);
 		}
 		vnic->uc_filter_count = 0;
 	}
-	hwrm_req_drop(bp, req);
+
 	return rc;
 }
 
@@ -11898,7 +11962,6 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
 {
 	struct net_device *dev = bp->dev;
 	struct bnxt_vnic_info *vnic = &bp->vnic_info[0];
-	struct hwrm_cfa_l2_filter_free_input *req;
 	struct netdev_hw_addr *ha;
 	int i, off = 0, rc;
 	bool uc_update;
@@ -11910,19 +11973,12 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
 	if (!uc_update)
 		goto skip_uc;
 
-	rc = hwrm_req_init(bp, req, HWRM_CFA_L2_FILTER_FREE);
-	if (rc)
-		return rc;
-	hwrm_req_hold(bp, req);
 	for (i = 1; i < vnic->uc_filter_count; i++) {
 		struct bnxt_l2_filter *fltr = vnic->l2_filters[i];
 
-		req->l2_filter_id = fltr->base.filter_id;
-
-		rc = hwrm_req_send(bp, req);
+		bnxt_hwrm_l2_filter_free(bp, fltr);
 		bnxt_del_l2_filter(bp, fltr);
 	}
-	hwrm_req_drop(bp, req);
 
 	vnic->uc_filter_count = 1;
 
@@ -13823,8 +13879,7 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 	rcu_read_unlock();
 
 	spin_lock_bh(&bp->ntp_fltr_lock);
-	bit_id = bitmap_find_free_region(bp->ntp_fltr_bmap,
-					 BNXT_NTP_FLTR_MAX_FLTR, 0);
+	bit_id = bitmap_find_free_region(bp->ntp_fltr_bmap, BNXT_MAX_FLTR, 0);
 	if (bit_id < 0) {
 		spin_unlock_bh(&bp->ntp_fltr_lock);
 		rc = -ENOMEM;

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -2398,6 +2398,7 @@ struct bnxt {
 	int			db_size;
 
 #define BNXT_NTP_FLTR_MAX_FLTR	4096
+#define BNXT_MAX_FLTR		(BNXT_NTP_FLTR_MAX_FLTR + BNXT_L2_FLTR_MAX_FLTR)
 #define BNXT_NTP_FLTR_HASH_SIZE	512
 #define BNXT_NTP_FLTR_HASH_MASK	(BNXT_NTP_FLTR_HASH_SIZE - 1)
 	struct hlist_head	ntp_fltr_hash_tbl[BNXT_NTP_FLTR_HASH_SIZE];
@@ -2621,6 +2622,8 @@ int bnxt_hwrm_func_drv_rgtr(struct bnxt *bp, unsigned long *bmap,
 			    int bmap_size, bool async_only);
 int bnxt_hwrm_func_drv_unrgtr(struct bnxt *bp);
 void bnxt_del_l2_filter(struct bnxt *bp, struct bnxt_l2_filter *fltr);
+int bnxt_hwrm_l2_filter_free(struct bnxt *bp, struct bnxt_l2_filter *fltr);
+int bnxt_hwrm_l2_filter_alloc(struct bnxt *bp, struct bnxt_l2_filter *fltr);
 int bnxt_get_nr_rss_ctxs(struct bnxt *bp, int rx_rings);
 int bnxt_hwrm_vnic_cfg(struct bnxt *bp, u16 vnic_id);
 int __bnxt_hwrm_get_tx_rings(struct bnxt *bp, u16 fid, int *tx_rings);