net: hns3: Optimize for unicast mac vlan table

In previously implement for unicast mac vlan table, the space is
shared by all the functions, driver does nothing when the space is
exhausted. This patch preallocates the space of unicast mac vlan
table for each function by software. Each function can only use its
private space and available shared space, avoiding single function
exhausts too much space, and other functions are unable to add
unicast mac address.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h

@@ -175,6 +175,7 @@ enum hclge_opcode_type {
 	HCLGE_OPC_MAC_VLAN_REMOVE	    = 0x1001,
 	HCLGE_OPC_MAC_VLAN_TYPE_ID	    = 0x1002,
 	HCLGE_OPC_MAC_VLAN_INSERT	    = 0x1003,
+	HCLGE_OPC_MAC_VLAN_ALLOCATE	    = 0x1004,
 	HCLGE_OPC_MAC_ETHTYPE_ADD	    = 0x1010,
 	HCLGE_OPC_MAC_ETHTYPE_REMOVE	= 0x1011,
 
@@ -401,6 +402,8 @@ struct hclge_pf_res_cmd {
 #define HCLGE_CFG_RSS_SIZE_M	GENMASK(31, 24)
 #define HCLGE_CFG_SPEED_ABILITY_S	0
 #define HCLGE_CFG_SPEED_ABILITY_M	GENMASK(7, 0)
+#define HCLGE_CFG_UMV_TBL_SPACE_S	16
+#define HCLGE_CFG_UMV_TBL_SPACE_M	GENMASK(31, 16)
 
 struct hclge_cfg_param_cmd {
 	__le32 offset;
@@ -590,6 +593,14 @@ struct hclge_mac_vlan_tbl_entry_cmd {
 	u8      rsv2[6];
 };
 
+#define HCLGE_UMV_SPC_ALC_B	0
+struct hclge_umv_spc_alc_cmd {
+	u8 allocate;
+	u8 rsv1[3];
+	__le32 space_size;
+	u8 rsv2[16];
+};
+
 #define HCLGE_MAC_MGR_MASK_VLAN_B		BIT(0)
 #define HCLGE_MAC_MGR_MASK_MAC_B		BIT(1)
 #define HCLGE_MAC_MGR_MASK_ETHERTYPE_B		BIT(2)

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c

@@ -31,6 +31,8 @@ static int hclge_set_mta_filter_mode(struct hclge_dev *hdev,
 static int hclge_set_mtu(struct hnae3_handle *handle, int new_mtu);
 static int hclge_init_vlan_config(struct hclge_dev *hdev);
 static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev);
+static int hclge_set_umv_space(struct hclge_dev *hdev, u16 space_size,
+			       u16 *allocated_size, bool is_alloc);
 
 static struct hnae3_ae_algo ae_algo;
 
@@ -778,6 +780,11 @@ static void hclge_parse_cfg(struct hclge_cfg *cfg, struct hclge_desc *desc)
 	cfg->speed_ability = hnae3_get_field(__le32_to_cpu(req->param[1]),
 					     HCLGE_CFG_SPEED_ABILITY_M,
 					     HCLGE_CFG_SPEED_ABILITY_S);
+	cfg->umv_space = hnae3_get_field(__le32_to_cpu(req->param[1]),
+					 HCLGE_CFG_UMV_TBL_SPACE_M,
+					 HCLGE_CFG_UMV_TBL_SPACE_S);
+	if (!cfg->umv_space)
+		cfg->umv_space = HCLGE_DEFAULT_UMV_SPACE_PER_PF;
 }
 
 /* hclge_get_cfg: query the static parameter from flash
@@ -856,6 +863,7 @@ static int hclge_configure(struct hclge_dev *hdev)
 	hdev->tm_info.num_pg = 1;
 	hdev->tc_max = cfg.tc_num;
 	hdev->tm_info.hw_pfc_map = 0;
+	hdev->wanted_umv_size = cfg.umv_space;
 
 	ret = hclge_parse_speed(cfg.default_speed, &hdev->hw.mac.speed);
 	if (ret) {
@@ -5237,6 +5245,118 @@ static int hclge_add_mac_vlan_tbl(struct hclge_vport *vport,
 	return cfg_status;
 }
 
+static int hclge_init_umv_space(struct hclge_dev *hdev)
+{
+	u16 allocated_size = 0;
+	int ret;
+
+	ret = hclge_set_umv_space(hdev, hdev->wanted_umv_size, &allocated_size,
+				  true);
+	if (ret)
+		return ret;
+
+	if (allocated_size < hdev->wanted_umv_size)
+		dev_warn(&hdev->pdev->dev,
+			 "Alloc umv space failed, want %d, get %d\n",
+			 hdev->wanted_umv_size, allocated_size);
+
+	mutex_init(&hdev->umv_mutex);
+	hdev->max_umv_size = allocated_size;
+	hdev->priv_umv_size = hdev->max_umv_size / (hdev->num_req_vfs + 2);
+	hdev->share_umv_size = hdev->priv_umv_size +
+			hdev->max_umv_size % (hdev->num_req_vfs + 2);
+
+	return 0;
+}
+
+static int hclge_uninit_umv_space(struct hclge_dev *hdev)
+{
+	int ret;
+
+	if (hdev->max_umv_size > 0) {
+		ret = hclge_set_umv_space(hdev, hdev->max_umv_size, NULL,
+					  false);
+		if (ret)
+			return ret;
+		hdev->max_umv_size = 0;
+	}
+	mutex_destroy(&hdev->umv_mutex);
+
+	return 0;
+}
+
+static int hclge_set_umv_space(struct hclge_dev *hdev, u16 space_size,
+			       u16 *allocated_size, bool is_alloc)
+{
+	struct hclge_umv_spc_alc_cmd *req;
+	struct hclge_desc desc;
+	int ret;
+
+	req = (struct hclge_umv_spc_alc_cmd *)desc.data;
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_MAC_VLAN_ALLOCATE, false);
+	hnae3_set_bit(req->allocate, HCLGE_UMV_SPC_ALC_B, !is_alloc);
+	req->space_size = cpu_to_le32(space_size);
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"%s umv space failed for cmd_send, ret =%d\n",
+			is_alloc ? "allocate" : "free", ret);
+		return ret;
+	}
+
+	if (is_alloc && allocated_size)
+		*allocated_size = le32_to_cpu(desc.data[1]);
+
+	return 0;
+}
+
+static void hclge_reset_umv_space(struct hclge_dev *hdev)
+{
+	struct hclge_vport *vport;
+	int i;
+
+	for (i = 0; i < hdev->num_alloc_vport; i++) {
+		vport = &hdev->vport[i];
+		vport->used_umv_num = 0;
+	}
+
+	mutex_lock(&hdev->umv_mutex);
+	hdev->share_umv_size = hdev->priv_umv_size +
+			hdev->max_umv_size % (hdev->num_req_vfs + 2);
+	mutex_unlock(&hdev->umv_mutex);
+}
+
+static bool hclge_is_umv_space_full(struct hclge_vport *vport)
+{
+	struct hclge_dev *hdev = vport->back;
+	bool is_full;
+
+	mutex_lock(&hdev->umv_mutex);
+	is_full = (vport->used_umv_num >= hdev->priv_umv_size &&
+		   hdev->share_umv_size == 0);
+	mutex_unlock(&hdev->umv_mutex);
+
+	return is_full;
+}
+
+static void hclge_update_umv_space(struct hclge_vport *vport, bool is_free)
+{
+	struct hclge_dev *hdev = vport->back;
+
+	mutex_lock(&hdev->umv_mutex);
+	if (is_free) {
+		if (vport->used_umv_num > hdev->priv_umv_size)
+			hdev->share_umv_size++;
+		vport->used_umv_num--;
+	} else {
+		if (vport->used_umv_num >= hdev->priv_umv_size)
+			hdev->share_umv_size--;
+		vport->used_umv_num++;
+	}
+	mutex_unlock(&hdev->umv_mutex);
+}
+
 static int hclge_add_uc_addr(struct hnae3_handle *handle,
 			     const unsigned char *addr)
 {
@@ -5282,8 +5402,19 @@ int hclge_add_uc_addr_common(struct hclge_vport *vport,
 	 * is not allowed in the mac vlan table.
 	 */
 	ret = hclge_lookup_mac_vlan_tbl(vport, &req, &desc, false);
-	if (ret == -ENOENT)
-		return hclge_add_mac_vlan_tbl(vport, &req, NULL);
+	if (ret == -ENOENT) {
+		if (!hclge_is_umv_space_full(vport)) {
+			ret = hclge_add_mac_vlan_tbl(vport, &req, NULL);
+			if (!ret)
+				hclge_update_umv_space(vport, false);
+			return ret;
+		}
+
+		dev_err(&hdev->pdev->dev, "UC MAC table full(%u)\n",
+			hdev->priv_umv_size);
+
+		return -ENOSPC;
+	}
 
 	/* check if we just hit the duplicate */
 	if (!ret)
@@ -5326,6 +5457,8 @@ int hclge_rm_uc_addr_common(struct hclge_vport *vport,
 	hnae3_set_bit(req.entry_type, HCLGE_MAC_VLAN_BIT0_EN_B, 0);
 	hclge_prepare_mac_addr(&req, addr);
 	ret = hclge_remove_mac_vlan_tbl(vport, &req);
+	if (!ret)
+		hclge_update_umv_space(vport, true);
 
 	return ret;
 }
@@ -6714,6 +6847,12 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 		}
 	}
 
+	ret = hclge_init_umv_space(hdev);
+	if (ret) {
+		dev_err(&pdev->dev, "umv space init error, ret=%d.\n", ret);
+		goto err_msi_irq_uninit;
+	}
+
 	ret = hclge_mac_init(hdev);
 	if (ret) {
 		dev_err(&pdev->dev, "Mac init error, ret = %d\n", ret);
@@ -6834,6 +6973,8 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev)
 		return ret;
 	}
 
+	hclge_reset_umv_space(hdev);
+
 	ret = hclge_mac_init(hdev);
 	if (ret) {
 		dev_err(&pdev->dev, "Mac init error, ret = %d\n", ret);
@@ -6887,6 +7028,8 @@ static void hclge_uninit_ae_dev(struct hnae3_ae_dev *ae_dev)
 	if (mac->phydev)
 		mdiobus_unregister(mac->mdio_bus);
 
+	hclge_uninit_umv_space(hdev);
+
 	/* Disable MISC vector(vector0) */
 	hclge_enable_vector(&hdev->misc_vector, false);
 	synchronize_irq(hdev->misc_vector.vector_irq);

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h

@@ -14,6 +14,8 @@
 #define HCLGE_MOD_VERSION "1.0"
 #define HCLGE_DRIVER_NAME "hclge"
 
+#define HCLGE_MAX_PF_NUM		8
+
 #define HCLGE_INVALID_VPORT 0xffff
 
 #define HCLGE_PF_CFG_BLOCK_SIZE		32
@@ -53,6 +55,10 @@
 #define HCLGE_RSS_TC_SIZE_6		64
 #define HCLGE_RSS_TC_SIZE_7		128
 
+#define HCLGE_UMV_TBL_SIZE		3072
+#define HCLGE_DEFAULT_UMV_SPACE_PER_PF \
+	(HCLGE_UMV_TBL_SIZE / HCLGE_MAX_PF_NUM)
+
 #define HCLGE_MTA_TBL_SIZE		4096
 
 #define HCLGE_TQP_RESET_TRY_TIMES	10
@@ -251,6 +257,7 @@ struct hclge_cfg {
 	u8 default_speed;
 	u32 numa_node_map;
 	u8 speed_ability;
+	u16 umv_space;
 };
 
 struct hclge_tm_info {
@@ -680,6 +687,15 @@ struct hclge_dev {
 	struct hclge_fd_cfg fd_cfg;
 	struct hlist_head fd_rule_list;
 	u16 hclge_fd_rule_num;
+
+	u16 wanted_umv_size;
+	/* max available unicast mac vlan space */
+	u16 max_umv_size;
+	/* private unicast mac vlan space, it's same for PF and its VFs */
+	u16 priv_umv_size;
+	/* unicast mac vlan space shared by PF and its VFs */
+	u16 share_umv_size;
+	struct mutex umv_mutex; /* protect share_umv_size */
 };
 
 /* VPort level vlan tag configuration for TX direction */
@@ -732,6 +748,8 @@ struct hclge_vport {
 	struct hclge_tx_vtag_cfg  txvlan_cfg;
 	struct hclge_rx_vtag_cfg  rxvlan_cfg;
 
+	u16 used_umv_num;
+
 	int vport_id;
 	struct hclge_dev *back;  /* Back reference to associated dev */
 	struct hnae3_handle nic;