net: hns: add fuzzy match of tcam table for hns

Since there is not enough tcam table entries for vlan and multicast
address, HNSv2 needs to add support of fuzzy matching of TCAM tables.
To add fuzzy match of TCAM, we Add the property to mask the bits to
be fuzzy matched

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 101 insertions, 39 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
index 8ea3d95fa483..64f45ee1ea3d 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -591,6 +591,16 @@ static void hns_dsaf_voq_bp_all_thrd_cfg(struct dsaf_device *dsaf_dev)
 	}
 }
 
+static void hns_dsaf_tbl_tcam_match_cfg(
+	struct dsaf_device *dsaf_dev,
+	struct dsaf_tbl_tcam_data *ptbl_tcam_data)
+{
+	dsaf_write_dev(dsaf_dev, DSAF_TBL_TCAM_MATCH_CFG_L_REG,
+		       ptbl_tcam_data->tbl_tcam_data_low);
+	dsaf_write_dev(dsaf_dev, DSAF_TBL_TCAM_MATCH_CFG_H_REG,
+		       ptbl_tcam_data->tbl_tcam_data_high);
+}
+
 /**
  * hns_dsaf_tbl_tcam_data_cfg - tbl
  * @dsaf_id: dsa fabric id
@@ -894,15 +904,16 @@ static void hns_dsaf_tcam_uc_cfg(
 }
 
 /**
- * hns_dsaf_tcam_mc_cfg - INT
- * @dsaf_id: dsa fabric id
- * @address,
- * @ptbl_tcam_data,
- * @ptbl_tcam_mcast,
+ * hns_dsaf_tcam_mc_cfg - cfg the tcam for mc
+ * @dsaf_dev: dsa fabric device struct pointer
+ * @address: tcam index
+ * @ptbl_tcam_data: tcam data struct pointer
+ * @ptbl_tcam_mcast: tcam mask struct pointer, it must be null for HNSv1
  */
 static void hns_dsaf_tcam_mc_cfg(
 	struct dsaf_device *dsaf_dev, u32 address,
 	struct dsaf_tbl_tcam_data *ptbl_tcam_data,
+	struct dsaf_tbl_tcam_data *ptbl_tcam_mask,
 	struct dsaf_tbl_tcam_mcast_cfg *ptbl_tcam_mcast)
 {
 	spin_lock_bh(&dsaf_dev->tcam_lock);
@@ -913,7 +924,11 @@ static void hns_dsaf_tcam_mc_cfg(
 	hns_dsaf_tbl_tcam_data_cfg(dsaf_dev, ptbl_tcam_data);
 	/*Write Tcam Mcast*/
 	hns_dsaf_tbl_tcam_mcast_cfg(dsaf_dev, ptbl_tcam_mcast);
-	/*Write Plus*/
+	/* Write Match Data */
+	if (ptbl_tcam_mask)
+		hns_dsaf_tbl_tcam_match_cfg(dsaf_dev, ptbl_tcam_mask);
+
+	/* Write Puls */
 	hns_dsaf_tbl_tcam_data_mcast_pul(dsaf_dev);
 
 	spin_unlock_bh(&dsaf_dev->tcam_lock);
@@ -1625,7 +1640,7 @@ int hns_dsaf_set_mac_mc_entry(
 
 	hns_dsaf_tcam_mc_cfg(
 		dsaf_dev, entry_index,
-		(struct dsaf_tbl_tcam_data *)(&mac_key), &mac_data);
+		(struct dsaf_tbl_tcam_data *)(&mac_key), NULL, &mac_data);
 
 	/* config software entry */
 	soft_mac_entry += entry_index;
@@ -1636,6 +1651,16 @@ int hns_dsaf_set_mac_mc_entry(
 	return 0;
 }
 
+static void hns_dsaf_mc_mask_bit_clear(char *dst, const char *src)
+{
+	u16 *a = (u16 *)dst;
+	const u16 *b = (const u16 *)src;
+
+	a[0] &= b[0];
+	a[1] &= b[1];
+	a[2] &= b[2];
+}
+
 /**
  * hns_dsaf_add_mac_mc_port - add mac mc-port
  * @dsaf_dev: dsa fabric device struct pointer
@@ -1646,11 +1671,14 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 {
 	u16 entry_index = DSAF_INVALID_ENTRY_IDX;
 	struct dsaf_drv_tbl_tcam_key mac_key;
+	struct dsaf_drv_tbl_tcam_key mask_key;
+	struct dsaf_tbl_tcam_data *pmask_key = NULL;
 	struct dsaf_tbl_tcam_mcast_cfg mac_data;
-	struct dsaf_drv_priv *priv =
-	    (struct dsaf_drv_priv *)hns_dsaf_dev_priv(dsaf_dev);
+	struct dsaf_drv_priv *priv = hns_dsaf_dev_priv(dsaf_dev);
 	struct dsaf_drv_soft_mac_tbl *soft_mac_entry = priv->soft_mac_tbl;
-	struct dsaf_drv_tbl_tcam_key tmp_mac_key;
+	struct dsaf_tbl_tcam_data tcam_data;
+	u8 mc_addr[ETH_ALEN];
+	u8 *mc_mask;
 	int mskid;
 
 	/*chechk mac addr */
@@ -1660,14 +1688,28 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 		return -EINVAL;
 	}
 
+	ether_addr_copy(mc_addr, mac_entry->addr);
+	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
+	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		/* prepare for key data setting */
+		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
+
+		/* config key mask */
+		hns_dsaf_set_mac_key(dsaf_dev, &mask_key,
+				     0x0,
+				     0xff,
+				     mc_mask);
+		pmask_key = (struct dsaf_tbl_tcam_data *)(&mask_key);
+	}
+
 	/*config key */
 	hns_dsaf_set_mac_key(
 		dsaf_dev, &mac_key, mac_entry->in_vlan_id,
-		mac_entry->in_port_num, mac_entry->addr);
+		mac_entry->in_port_num, mc_addr);
 
 	memset(&mac_data, 0, sizeof(struct dsaf_tbl_tcam_mcast_cfg));
 
-	/*check exist? */
+	/* check if the tcam is exist */
 	entry_index = hns_dsaf_find_soft_mac_entry(dsaf_dev, &mac_key);
 	if (entry_index == DSAF_INVALID_ENTRY_IDX) {
 		/*if hasnot , find a empty*/
@@ -1681,11 +1723,11 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 			return -EINVAL;
 		}
 	} else {
-		/*if exist, add in */
-		hns_dsaf_tcam_mc_get(
-			dsaf_dev, entry_index,
-			(struct dsaf_tbl_tcam_data *)(&tmp_mac_key), &mac_data);
+		/* if exist, add in */
+		hns_dsaf_tcam_mc_get(dsaf_dev, entry_index, &tcam_data,
+				     &mac_data);
 	}
+
 	/* config hardware entry */
 	if (mac_entry->port_num < DSAF_SERVICE_NW_NUM) {
 		mskid = mac_entry->port_num;
@@ -1708,9 +1750,12 @@ int hns_dsaf_add_mac_mc_port(struct dsaf_device *dsaf_dev,
 		dsaf_dev->ae_dev.name, mac_key.high.val,
 		mac_key.low.val, entry_index);
 
-	hns_dsaf_tcam_mc_cfg(
-		dsaf_dev, entry_index,
-		(struct dsaf_tbl_tcam_data *)(&mac_key), &mac_data);
+	tcam_data.tbl_tcam_data_high = mac_key.high.val;
+	tcam_data.tbl_tcam_data_low = mac_key.low.val;
+
+	/* config mc entry with mask */
+	hns_dsaf_tcam_mc_cfg(dsaf_dev, entry_index, &tcam_data,
+			     pmask_key, &mac_data);
 
 	/*config software entry */
 	soft_mac_entry += entry_index;
@@ -1782,15 +1827,18 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 {
 	u16 entry_index = DSAF_INVALID_ENTRY_IDX;
 	struct dsaf_drv_tbl_tcam_key mac_key;
-	struct dsaf_drv_priv *priv =
-	    (struct dsaf_drv_priv *)hns_dsaf_dev_priv(dsaf_dev);
+	struct dsaf_drv_priv *priv = hns_dsaf_dev_priv(dsaf_dev);
 	struct dsaf_drv_soft_mac_tbl *soft_mac_entry = priv->soft_mac_tbl;
 	u16 vlan_id;
 	u8 in_port_num;
 	struct dsaf_tbl_tcam_mcast_cfg mac_data;
-	struct dsaf_drv_tbl_tcam_key tmp_mac_key;
+	struct dsaf_tbl_tcam_data tcam_data;
 	int mskid;
 	const u8 empty_msk[sizeof(mac_data.tbl_mcast_port_msk)] = {0};
+	struct dsaf_drv_tbl_tcam_key mask_key;
+	struct dsaf_tbl_tcam_data *pmask_key = NULL;
+	u8 mc_addr[ETH_ALEN];
+	u8 *mc_mask;
 
 	if (!(void *)mac_entry) {
 		dev_err(dsaf_dev->dev,
@@ -1798,10 +1846,6 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 		return -EINVAL;
 	}
 
-	/*get key info*/
-	vlan_id = mac_entry->in_vlan_id;
-	in_port_num = mac_entry->in_port_num;
-
 	/*check mac addr */
 	if (MAC_IS_ALL_ZEROS(mac_entry->addr)) {
 		dev_err(dsaf_dev->dev, "del_port failed, addr %pM!\n",
@@ -1809,11 +1853,28 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 		return -EINVAL;
 	}
 
-	/*config key */
-	hns_dsaf_set_mac_key(dsaf_dev, &mac_key, vlan_id, in_port_num,
-			     mac_entry->addr);
+	/* always mask vlan_id field */
+	ether_addr_copy(mc_addr, mac_entry->addr);
+	mc_mask = dsaf_dev->mac_cb[mac_entry->in_port_num]->mc_mask;
 
-	/*check is exist? */
+	if (!AE_IS_VER1(dsaf_dev->dsaf_ver)) {
+		/* prepare for key data setting */
+		hns_dsaf_mc_mask_bit_clear(mc_addr, mc_mask);
+
+		/* config key mask */
+		hns_dsaf_set_mac_key(dsaf_dev, &mask_key, 0x00, 0xff, mc_addr);
+
+		pmask_key = (struct dsaf_tbl_tcam_data *)(&mask_key);
+	}
+
+	/* get key info */
+	vlan_id = mac_entry->in_vlan_id;
+	in_port_num = mac_entry->in_port_num;
+
+	/* config key */
+	hns_dsaf_set_mac_key(dsaf_dev, &mac_key, vlan_id, in_port_num, mc_addr);
+
+	/* check if the tcam entry is exist */
 	entry_index = hns_dsaf_find_soft_mac_entry(dsaf_dev, &mac_key);
 	if (entry_index == DSAF_INVALID_ENTRY_IDX) {
 		/*find none */
@@ -1829,10 +1890,8 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 		dsaf_dev->ae_dev.name, mac_key.high.val,
 		mac_key.low.val, entry_index);
 
-	/*read entry*/
-	hns_dsaf_tcam_mc_get(
-		dsaf_dev, entry_index,
-		(struct dsaf_tbl_tcam_data *)(&tmp_mac_key), &mac_data);
+	/* read entry */
+	hns_dsaf_tcam_mc_get(dsaf_dev, entry_index, &tcam_data, &mac_data);
 
 	/*del the port*/
 	if (mac_entry->port_num < DSAF_SERVICE_NW_NUM) {
@@ -1857,10 +1916,13 @@ int hns_dsaf_del_mac_mc_port(struct dsaf_device *dsaf_dev,
 		/* del soft entry */
 		soft_mac_entry += entry_index;
 		soft_mac_entry->index = DSAF_INVALID_ENTRY_IDX;
-	} else { /* not zer, just del port, updata*/
-		hns_dsaf_tcam_mc_cfg(
-			dsaf_dev, entry_index,
-			(struct dsaf_tbl_tcam_data *)(&mac_key), &mac_data);
+	} else { /* not zero, just del port, update */
+		tcam_data.tbl_tcam_data_high = mac_key.high.val;
+		tcam_data.tbl_tcam_data_low = mac_key.low.val;
+
+		hns_dsaf_tcam_mc_cfg(dsaf_dev, entry_index,
+				     &tcam_data,
+				     pmask_key, &mac_data);
 	}
 
 	return 0;
@@ -1976,7 +2038,7 @@ int hns_dsaf_get_mac_entry_by_index(
 
 	struct dsaf_tbl_tcam_mcast_cfg mac_data;
 	struct dsaf_tbl_tcam_ucast_cfg mac_uc_data;
-	char mac_addr[MAC_NUM_OCTETS_PER_ADDR] = {0};
+	char mac_addr[ETH_ALEN] = {0};
 
 	if (entry_index >= DSAF_TCAM_SUM) {
 		/* find none, del error */