net: hns3: Add flow director initialization

Flow director is a new feature supported by hardware with revision 0x21.
This patch adds flow direcor initialization for each PF. It queries flow
director mode and tcam resource from firmware, selects tuples used for
input key.

Signed-off-by: Jian Shen <[email protected]>
Signed-off-by: Peng Li <[email protected]>
Signed-off-by: Salil Mehta <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: IronShen

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -51,6 +51,7 @@
 #define HNAE3_KNIC_CLIENT_INITED_B		0x3
 #define HNAE3_UNIC_CLIENT_INITED_B		0x4
 #define HNAE3_ROCE_CLIENT_INITED_B		0x5
+#define HNAE3_DEV_SUPPORT_FD_B			0x6
 
 #define HNAE3_DEV_SUPPORT_ROCE_DCB_BITS (BIT(HNAE3_DEV_SUPPORT_DCB_B) |\
 		BIT(HNAE3_DEV_SUPPORT_ROCE_B))
@@ -61,6 +62,9 @@
 #define hnae3_dev_dcb_supported(hdev) \
 	hnae3_get_bit(hdev->ae_dev->flag, HNAE3_DEV_SUPPORT_DCB_B)
 
+#define hnae3_dev_fd_supported(hdev) \
+	hnae3_get_bit((hdev)->ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B)
+
 #define ring_ptr_move_fw(ring, p) \
 	((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
 #define ring_ptr_move_bw(ring, p) \

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -1622,6 +1622,13 @@ static void hns3_disable_sriov(struct pci_dev *pdev)
 	pci_disable_sriov(pdev);
 }
 
+static void hns3_get_dev_capability(struct pci_dev *pdev,
+				    struct hnae3_ae_dev *ae_dev)
+{
+	if (pdev->revision >= 0x21)
+		hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
+}
+
 /* hns3_probe - Device initialization routine
  * @pdev: PCI device information struct
  * @ent: entry in hns3_pci_tbl
@@ -1647,6 +1654,7 @@ static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ae_dev->pdev = pdev;
 	ae_dev->flag = ent->driver_data;
 	ae_dev->dev_type = HNAE3_DEV_KNIC;
+	hns3_get_dev_capability(pdev, ae_dev);
 	pci_set_drvdata(pdev, ae_dev);
 
 	hnae3_register_ae_dev(ae_dev);

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

@@ -190,6 +190,11 @@ enum hclge_opcode_type {
 	HCLGE_OPC_VLAN_FILTER_PF_CFG	= 0x1101,
 	HCLGE_OPC_VLAN_FILTER_VF_CFG	= 0x1102,
 
+	/* Flow Director commands */
+	HCLGE_OPC_FD_MODE_CTRL		= 0x1200,
+	HCLGE_OPC_FD_GET_ALLOCATION	= 0x1201,
+	HCLGE_OPC_FD_KEY_CONFIG		= 0x1202,
+
 	/* MDIO command */
 	HCLGE_OPC_MDIO_CONFIG		= 0x1900,
 
@@ -819,6 +824,33 @@ struct hclge_set_led_state_cmd {
 	u8 rsv2[20];
 };
 
+struct hclge_get_fd_mode_cmd {
+	u8 mode;
+	u8 enable;
+	u8 rsv[22];
+};
+
+struct hclge_get_fd_allocation_cmd {
+	__le32 stage1_entry_num;
+	__le32 stage2_entry_num;
+	__le16 stage1_counter_num;
+	__le16 stage2_counter_num;
+	u8 rsv[12];
+};
+
+struct hclge_set_fd_key_config_cmd {
+	u8 stage;
+	u8 key_select;
+	u8 inner_sipv6_word_en;
+	u8 inner_dipv6_word_en;
+	u8 outer_sipv6_word_en;
+	u8 outer_dipv6_word_en;
+	u8 rsv1[2];
+	__le32 tuple_mask;
+	__le32 meta_data_mask;
+	u8 rsv2[8];
+};
+
 int hclge_cmd_init(struct hclge_dev *hdev);
 static inline void hclge_write_reg(void __iomem *base, u32 reg, u32 value)
 {

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

@@ -3328,6 +3328,149 @@ static void hclge_set_promisc_mode(struct hnae3_handle *handle, bool en_uc_pmc,
 	hclge_cmd_set_promisc_mode(hdev, &param);
 }
 
+static int hclge_get_fd_mode(struct hclge_dev *hdev, u8 *fd_mode)
+{
+	struct hclge_get_fd_mode_cmd *req;
+	struct hclge_desc desc;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_FD_MODE_CTRL, true);
+
+	req = (struct hclge_get_fd_mode_cmd *)desc.data;
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev, "get fd mode fail, ret=%d\n", ret);
+		return ret;
+	}
+
+	*fd_mode = req->mode;
+
+	return ret;
+}
+
+static int hclge_get_fd_allocation(struct hclge_dev *hdev,
+				   u32 *stage1_entry_num,
+				   u32 *stage2_entry_num,
+				   u16 *stage1_counter_num,
+				   u16 *stage2_counter_num)
+{
+	struct hclge_get_fd_allocation_cmd *req;
+	struct hclge_desc desc;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_FD_GET_ALLOCATION, true);
+
+	req = (struct hclge_get_fd_allocation_cmd *)desc.data;
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret) {
+		dev_err(&hdev->pdev->dev, "query fd allocation fail, ret=%d\n",
+			ret);
+		return ret;
+	}
+
+	*stage1_entry_num = le32_to_cpu(req->stage1_entry_num);
+	*stage2_entry_num = le32_to_cpu(req->stage2_entry_num);
+	*stage1_counter_num = le16_to_cpu(req->stage1_counter_num);
+	*stage2_counter_num = le16_to_cpu(req->stage2_counter_num);
+
+	return ret;
+}
+
+static int hclge_set_fd_key_config(struct hclge_dev *hdev, int stage_num)
+{
+	struct hclge_set_fd_key_config_cmd *req;
+	struct hclge_fd_key_cfg *stage;
+	struct hclge_desc desc;
+	int ret;
+
+	hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_FD_KEY_CONFIG, false);
+
+	req = (struct hclge_set_fd_key_config_cmd *)desc.data;
+	stage = &hdev->fd_cfg.key_cfg[stage_num];
+	req->stage = stage_num;
+	req->key_select = stage->key_sel;
+	req->inner_sipv6_word_en = stage->inner_sipv6_word_en;
+	req->inner_dipv6_word_en = stage->inner_dipv6_word_en;
+	req->outer_sipv6_word_en = stage->outer_sipv6_word_en;
+	req->outer_dipv6_word_en = stage->outer_dipv6_word_en;
+	req->tuple_mask = cpu_to_le32(~stage->tuple_active);
+	req->meta_data_mask = cpu_to_le32(~stage->meta_data_active);
+
+	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+	if (ret)
+		dev_err(&hdev->pdev->dev, "set fd key fail, ret=%d\n", ret);
+
+	return ret;
+}
+
+static int hclge_init_fd_config(struct hclge_dev *hdev)
+{
+#define LOW_2_WORDS		0x03
+	struct hclge_fd_key_cfg *key_cfg;
+	int ret;
+
+	if (!hnae3_dev_fd_supported(hdev))
+		return 0;
+
+	ret = hclge_get_fd_mode(hdev, &hdev->fd_cfg.fd_mode);
+	if (ret)
+		return ret;
+
+	switch (hdev->fd_cfg.fd_mode) {
+	case HCLGE_FD_MODE_DEPTH_2K_WIDTH_400B_STAGE_1:
+		hdev->fd_cfg.max_key_length = MAX_KEY_LENGTH;
+		break;
+	case HCLGE_FD_MODE_DEPTH_4K_WIDTH_200B_STAGE_1:
+		hdev->fd_cfg.max_key_length = MAX_KEY_LENGTH / 2;
+		break;
+	default:
+		dev_err(&hdev->pdev->dev,
+			"Unsupported flow director mode %d\n",
+			hdev->fd_cfg.fd_mode);
+		return -EOPNOTSUPP;
+	}
+
+	hdev->fd_cfg.fd_en = true;
+	hdev->fd_cfg.proto_support =
+		TCP_V4_FLOW | UDP_V4_FLOW | SCTP_V4_FLOW | TCP_V6_FLOW |
+		UDP_V6_FLOW | SCTP_V6_FLOW | IPV4_USER_FLOW | IPV6_USER_FLOW;
+	key_cfg = &hdev->fd_cfg.key_cfg[HCLGE_FD_STAGE_1];
+	key_cfg->key_sel = HCLGE_FD_KEY_BASE_ON_TUPLE,
+	key_cfg->inner_sipv6_word_en = LOW_2_WORDS;
+	key_cfg->inner_dipv6_word_en = LOW_2_WORDS;
+	key_cfg->outer_sipv6_word_en = 0;
+	key_cfg->outer_dipv6_word_en = 0;
+
+	key_cfg->tuple_active = BIT(INNER_VLAN_TAG_FST) | BIT(INNER_ETH_TYPE) |
+				BIT(INNER_IP_PROTO) | BIT(INNER_IP_TOS) |
+				BIT(INNER_SRC_IP) | BIT(INNER_DST_IP) |
+				BIT(INNER_SRC_PORT) | BIT(INNER_DST_PORT);
+
+	/* If use max 400bit key, we can support tuples for ether type */
+	if (hdev->fd_cfg.max_key_length == MAX_KEY_LENGTH) {
+		hdev->fd_cfg.proto_support |= ETHER_FLOW;
+		key_cfg->tuple_active |=
+				BIT(INNER_DST_MAC) | BIT(INNER_SRC_MAC);
+	}
+
+	/* roce_type is used to filter roce frames
+	 * dst_vport is used to specify the rule
+	 */
+	key_cfg->meta_data_active = BIT(ROCE_TYPE) | BIT(DST_VPORT);
+
+	ret = hclge_get_fd_allocation(hdev,
+				      &hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1],
+				      &hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_2],
+				      &hdev->fd_cfg.cnt_num[HCLGE_FD_STAGE_1],
+				      &hdev->fd_cfg.cnt_num[HCLGE_FD_STAGE_2]);
+	if (ret)
+		return ret;
+
+	return hclge_set_fd_key_config(hdev, HCLGE_FD_STAGE_1);
+}
+
 static void hclge_cfg_mac_mode(struct hclge_dev *hdev, bool enable)
 {
 	struct hclge_desc desc;
@@ -5502,6 +5645,13 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 		goto err_mdiobus_unreg;
 	}
 
+	ret = hclge_init_fd_config(hdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"fd table init fail, ret=%d\n", ret);
+		goto err_mdiobus_unreg;
+	}
+
 	hclge_dcb_ops_set(hdev);
 
 	timer_setup(&hdev->service_timer, hclge_service_timer, 0);
@@ -5608,6 +5758,13 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev)
 		return ret;
 	}
 
+	ret = hclge_init_fd_config(hdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"fd table init fail, ret=%d\n", ret);
+		return ret;
+	}
+
 	dev_info(&pdev->dev, "Reset done, %s driver initialization finished.\n",
 		 HCLGE_DRIVER_NAME);