net: hns3: refactor function hclge_mbx_handler()

Currently, the function hclge_mbx_handler() has too many switch-case
statements, it makes this function too long. To improve code readability,
refactor this function and use lookup table instead.
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -233,6 +233,17 @@ struct hclgevf_mbx_arq_ring {
 	__le16 msg_q[HCLGE_MBX_MAX_ARQ_MSG_NUM][HCLGE_MBX_MAX_ARQ_MSG_SIZE];
 };
 
+struct hclge_dev;
+
+#define HCLGE_MBX_OPCODE_MAX 256
+struct hclge_mbx_ops_param {
+	struct hclge_vport *vport;
+	struct hclge_mbx_vf_to_pf_cmd *req;
+	struct hclge_respond_to_vf_msg *resp_msg;
+};
+
+typedef int (*hclge_mbx_ops_fn)(struct hclge_mbx_ops_param *param);
+
 #define hclge_mbx_ring_ptr_move_crq(crq) \
 	(crq->next_to_use = (crq->next_to_use + 1) % crq->desc_num)
 #define hclge_mbx_tail_ptr_move_arq(arq) \

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

@@ -779,187 +779,318 @@ static void hclge_handle_vf_tbl(struct hclge_vport *vport,
 	}
 }
 
-void hclge_mbx_handler(struct hclge_dev *hdev)
+static int
+hclge_mbx_map_ring_to_vector_handler(struct hclge_mbx_ops_param *param)
 {
-	struct hclge_comm_cmq_ring *crq = &hdev->hw.hw.cmq.crq;
-	struct hclge_respond_to_vf_msg resp_msg;
-	struct hclge_mbx_vf_to_pf_cmd *req;
-	struct hclge_vport *vport;
-	struct hclge_desc *desc;
-	bool is_del = false;
-	unsigned int flag;
-	int ret = 0;
-
-	/* handle all the mailbox requests in the queue */
-	while (!hclge_cmd_crq_empty(&hdev->hw)) {
-		if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE,
-			     &hdev->hw.hw.comm_state)) {
-			dev_warn(&hdev->pdev->dev,
-				 "command queue needs re-initializing\n");
-			return;
-		}
-
-		desc = &crq->desc[crq->next_to_use];
-		req = (struct hclge_mbx_vf_to_pf_cmd *)desc->data;
-
-		flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
-		if (unlikely(!hnae3_get_bit(flag, HCLGE_CMDQ_RX_OUTVLD_B))) {
-			dev_warn(&hdev->pdev->dev,
-				 "dropped invalid mailbox message, code = %u\n",
-				 req->msg.code);
-
-			/* dropping/not processing this invalid message */
-			crq->desc[crq->next_to_use].flag = 0;
-			hclge_mbx_ring_ptr_move_crq(crq);
-			continue;
-		}
-
-		vport = &hdev->vport[req->mbx_src_vfid];
+	return hclge_map_unmap_ring_to_vf_vector(param->vport, true,
+						 param->req);
+}
 
-		trace_hclge_pf_mbx_get(hdev, req);
+static int
+hclge_mbx_unmap_ring_to_vector_handler(struct hclge_mbx_ops_param *param)
+{
+	return hclge_map_unmap_ring_to_vf_vector(param->vport, false,
+						 param->req);
+}
 
-		/* clear the resp_msg before processing every mailbox message */
-		memset(&resp_msg, 0, sizeof(resp_msg));
+static int
+hclge_mbx_get_ring_vector_map_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
 
-		switch (req->msg.code) {
-		case HCLGE_MBX_MAP_RING_TO_VECTOR:
-			ret = hclge_map_unmap_ring_to_vf_vector(vport, true,
-								req);
-			break;
-		case HCLGE_MBX_UNMAP_RING_TO_VECTOR:
-			ret = hclge_map_unmap_ring_to_vf_vector(vport, false,
-								req);
-			break;
-		case HCLGE_MBX_GET_RING_VECTOR_MAP:
-			ret = hclge_get_vf_ring_vector_map(vport, req,
-							   &resp_msg);
+	ret = hclge_get_vf_ring_vector_map(param->vport, param->req,
+					   param->resp_msg);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"PF fail(%d) to get VF ring vector map\n",
 			ret);
-			break;
-		case HCLGE_MBX_SET_PROMISC_MODE:
-			hclge_set_vf_promisc_mode(vport, req);
-			break;
-		case HCLGE_MBX_SET_UNICAST:
-			ret = hclge_set_vf_uc_mac_addr(vport, req);
+	return ret;
+}
+
+static int hclge_mbx_set_promisc_mode_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_set_vf_promisc_mode(param->vport, param->req);
+	return 0;
+}
+
+static int hclge_mbx_set_unicast_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_set_vf_uc_mac_addr(param->vport, param->req);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"PF fail(%d) to set VF UC MAC Addr\n",
 			ret);
-			break;
-		case HCLGE_MBX_SET_MULTICAST:
-			ret = hclge_set_vf_mc_mac_addr(vport, req);
+	return ret;
+}
+
+static int hclge_mbx_set_multicast_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_set_vf_mc_mac_addr(param->vport, param->req);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"PF fail(%d) to set VF MC MAC Addr\n",
 			ret);
-			break;
-		case HCLGE_MBX_SET_VLAN:
-			ret = hclge_set_vf_vlan_cfg(vport, req, &resp_msg);
+	return ret;
+}
+
+static int hclge_mbx_set_vlan_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_set_vf_vlan_cfg(param->vport, param->req, param->resp_msg);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"PF failed(%d) to config VF's VLAN\n",
 			ret);
-			break;
-		case HCLGE_MBX_SET_ALIVE:
-			ret = hclge_set_vf_alive(vport, req);
+	return ret;
+}
+
+static int hclge_mbx_set_alive_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_set_vf_alive(param->vport, param->req);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"PF failed(%d) to set VF's ALIVE\n",
 			ret);
-			break;
-		case HCLGE_MBX_GET_QINFO:
-			hclge_get_vf_queue_info(vport, &resp_msg);
-			break;
-		case HCLGE_MBX_GET_QDEPTH:
-			hclge_get_vf_queue_depth(vport, &resp_msg);
-			break;
-		case HCLGE_MBX_GET_BASIC_INFO:
-			hclge_get_basic_info(vport, &resp_msg);
-			break;
-		case HCLGE_MBX_GET_LINK_STATUS:
-			ret = hclge_push_vf_link_status(vport);
+	return ret;
+}
+
+static int hclge_mbx_get_qinfo_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_vf_queue_info(param->vport, param->resp_msg);
+	return 0;
+}
+
+static int hclge_mbx_get_qdepth_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_vf_queue_depth(param->vport, param->resp_msg);
+	return 0;
+}
+
+static int hclge_mbx_get_basic_info_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_basic_info(param->vport, param->resp_msg);
+	return 0;
+}
+
+static int hclge_mbx_get_link_status_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_push_vf_link_status(param->vport);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"failed to inform link stat to VF, ret = %d\n",
 			ret);
-			break;
-		case HCLGE_MBX_QUEUE_RESET:
-			ret = hclge_mbx_reset_vf_queue(vport, req, &resp_msg);
-			break;
-		case HCLGE_MBX_RESET:
-			ret = hclge_reset_vf(vport);
-			break;
-		case HCLGE_MBX_KEEP_ALIVE:
-			hclge_vf_keep_alive(vport);
-			break;
-		case HCLGE_MBX_SET_MTU:
-			ret = hclge_set_vf_mtu(vport, req);
+	return ret;
+}
+
+static int hclge_mbx_queue_reset_handler(struct hclge_mbx_ops_param *param)
+{
+	return hclge_mbx_reset_vf_queue(param->vport, param->req,
+					param->resp_msg);
+}
+
+static int hclge_mbx_reset_handler(struct hclge_mbx_ops_param *param)
+{
+	return hclge_reset_vf(param->vport);
+}
+
+static int hclge_mbx_keep_alive_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_vf_keep_alive(param->vport);
+	return 0;
+}
+
+static int hclge_mbx_set_mtu_handler(struct hclge_mbx_ops_param *param)
+{
+	int ret;
+
+	ret = hclge_set_vf_mtu(param->vport, param->req);
 	if (ret)
-				dev_err(&hdev->pdev->dev,
+		dev_err(&param->vport->back->pdev->dev,
 			"VF fail(%d) to set mtu\n", ret);
-			break;
-		case HCLGE_MBX_GET_QID_IN_PF:
-			ret = hclge_get_queue_id_in_pf(vport, req, &resp_msg);
-			break;
-		case HCLGE_MBX_GET_RSS_KEY:
-			ret = hclge_get_rss_key(vport, req, &resp_msg);
-			break;
-		case HCLGE_MBX_GET_LINK_MODE:
-			hclge_get_link_mode(vport, req);
-			break;
-		case HCLGE_MBX_GET_VF_FLR_STATUS:
-		case HCLGE_MBX_VF_UNINIT:
-			is_del = req->msg.code == HCLGE_MBX_VF_UNINIT;
-			hclge_rm_vport_all_mac_table(vport, is_del,
+	return ret;
+}
+
+static int hclge_mbx_get_qid_in_pf_handler(struct hclge_mbx_ops_param *param)
+{
+	return hclge_get_queue_id_in_pf(param->vport, param->req,
+					param->resp_msg);
+}
+
+static int hclge_mbx_get_rss_key_handler(struct hclge_mbx_ops_param *param)
+{
+	return hclge_get_rss_key(param->vport, param->req, param->resp_msg);
+}
+
+static int hclge_mbx_get_link_mode_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_link_mode(param->vport, param->req);
+	return 0;
+}
+
+static int
+hclge_mbx_get_vf_flr_status_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_rm_vport_all_mac_table(param->vport, false,
 				     HCLGE_MAC_ADDR_UC);
-			hclge_rm_vport_all_mac_table(vport, is_del,
+	hclge_rm_vport_all_mac_table(param->vport, false,
 				     HCLGE_MAC_ADDR_MC);
-			hclge_rm_vport_all_vlan_table(vport, is_del);
-			break;
-		case HCLGE_MBX_GET_MEDIA_TYPE:
-			hclge_get_vf_media_type(vport, &resp_msg);
-			break;
-		case HCLGE_MBX_PUSH_LINK_STATUS:
-			hclge_handle_link_change_event(hdev, req);
-			break;
-		case HCLGE_MBX_GET_MAC_ADDR:
-			hclge_get_vf_mac_addr(vport, &resp_msg);
-			break;
-		case HCLGE_MBX_NCSI_ERROR:
-			hclge_handle_ncsi_error(hdev);
-			break;
-		case HCLGE_MBX_HANDLE_VF_TBL:
-			hclge_handle_vf_tbl(vport, req);
-			break;
-		default:
+	hclge_rm_vport_all_vlan_table(param->vport, false);
+	return 0;
+}
+
+static int hclge_mbx_vf_uninit_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_rm_vport_all_mac_table(param->vport, true,
+				     HCLGE_MAC_ADDR_UC);
+	hclge_rm_vport_all_mac_table(param->vport, true,
+				     HCLGE_MAC_ADDR_MC);
+	hclge_rm_vport_all_vlan_table(param->vport, true);
+	return 0;
+}
+
+static int hclge_mbx_get_media_type_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_vf_media_type(param->vport, param->resp_msg);
+	return 0;
+}
+
+static int hclge_mbx_push_link_status_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_handle_link_change_event(param->vport->back, param->req);
+	return 0;
+}
+
+static int hclge_mbx_get_mac_addr_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_get_vf_mac_addr(param->vport, param->resp_msg);
+	return 0;
+}
+
+static int hclge_mbx_ncsi_error_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_handle_ncsi_error(param->vport->back);
+	return 0;
+}
+
+static int hclge_mbx_handle_vf_tbl_handler(struct hclge_mbx_ops_param *param)
+{
+	hclge_handle_vf_tbl(param->vport, param->req);
+	return 0;
+}
+
+static const hclge_mbx_ops_fn hclge_mbx_ops_list[HCLGE_MBX_OPCODE_MAX] = {
+	[HCLGE_MBX_RESET]   = hclge_mbx_reset_handler,
+	[HCLGE_MBX_SET_UNICAST] = hclge_mbx_set_unicast_handler,
+	[HCLGE_MBX_SET_MULTICAST] = hclge_mbx_set_multicast_handler,
+	[HCLGE_MBX_SET_VLAN] = hclge_mbx_set_vlan_handler,
+	[HCLGE_MBX_MAP_RING_TO_VECTOR] = hclge_mbx_map_ring_to_vector_handler,
+	[HCLGE_MBX_UNMAP_RING_TO_VECTOR] = hclge_mbx_unmap_ring_to_vector_handler,
+	[HCLGE_MBX_SET_PROMISC_MODE] = hclge_mbx_set_promisc_mode_handler,
+	[HCLGE_MBX_GET_QINFO] = hclge_mbx_get_qinfo_handler,
+	[HCLGE_MBX_GET_QDEPTH] = hclge_mbx_get_qdepth_handler,
+	[HCLGE_MBX_GET_BASIC_INFO] = hclge_mbx_get_basic_info_handler,
+	[HCLGE_MBX_GET_RSS_KEY] = hclge_mbx_get_rss_key_handler,
+	[HCLGE_MBX_GET_MAC_ADDR] = hclge_mbx_get_mac_addr_handler,
+	[HCLGE_MBX_GET_LINK_STATUS] = hclge_mbx_get_link_status_handler,
+	[HCLGE_MBX_QUEUE_RESET] = hclge_mbx_queue_reset_handler,
+	[HCLGE_MBX_KEEP_ALIVE] = hclge_mbx_keep_alive_handler,
+	[HCLGE_MBX_SET_ALIVE] = hclge_mbx_set_alive_handler,
+	[HCLGE_MBX_SET_MTU] = hclge_mbx_set_mtu_handler,
+	[HCLGE_MBX_GET_QID_IN_PF] = hclge_mbx_get_qid_in_pf_handler,
+	[HCLGE_MBX_GET_LINK_MODE] = hclge_mbx_get_link_mode_handler,
+	[HCLGE_MBX_GET_MEDIA_TYPE] = hclge_mbx_get_media_type_handler,
+	[HCLGE_MBX_VF_UNINIT] = hclge_mbx_vf_uninit_handler,
+	[HCLGE_MBX_HANDLE_VF_TBL] = hclge_mbx_handle_vf_tbl_handler,
+	[HCLGE_MBX_GET_RING_VECTOR_MAP] = hclge_mbx_get_ring_vector_map_handler,
+	[HCLGE_MBX_GET_VF_FLR_STATUS] = hclge_mbx_get_vf_flr_status_handler,
+	[HCLGE_MBX_PUSH_LINK_STATUS] = hclge_mbx_push_link_status_handler,
+	[HCLGE_MBX_NCSI_ERROR] = hclge_mbx_ncsi_error_handler,
+};
+
+static void hclge_mbx_request_handling(struct hclge_mbx_ops_param *param)
+{
+	hclge_mbx_ops_fn cmd_func = NULL;
+	struct hclge_dev *hdev;
+	int ret = 0;
+
+	hdev = param->vport->back;
+	cmd_func = hclge_mbx_ops_list[param->req->msg.code];
+	if (cmd_func)
+		ret = cmd_func(param);
+	else
 		dev_err(&hdev->pdev->dev,
 			"un-supported mailbox message, code = %u\n",
-				req->msg.code);
-			break;
-		}
+			param->req->msg.code);
 
 	/* PF driver should not reply IMP */
-		if (hnae3_get_bit(req->mbx_need_resp, HCLGE_MBX_NEED_RESP_B) &&
-		    req->msg.code < HCLGE_MBX_GET_VF_FLR_STATUS) {
-			resp_msg.status = ret;
+	if (hnae3_get_bit(param->req->mbx_need_resp, HCLGE_MBX_NEED_RESP_B) &&
+	    param->req->msg.code < HCLGE_MBX_GET_VF_FLR_STATUS) {
+		param->resp_msg->status = ret;
 		if (time_is_before_jiffies(hdev->last_mbx_scheduled +
 					   HCLGE_MBX_SCHED_TIMEOUT))
 			dev_warn(&hdev->pdev->dev,
 				 "resp vport%u mbx(%u,%u) late\n",
-					 req->mbx_src_vfid,
-					 req->msg.code,
-					 req->msg.subcode);
+				 param->req->mbx_src_vfid,
+				 param->req->msg.code,
+				 param->req->msg.subcode);
 
-			hclge_gen_resp_to_vf(vport, req, &resp_msg);
+		hclge_gen_resp_to_vf(param->vport, param->req, param->resp_msg);
 	}
+}
+
+void hclge_mbx_handler(struct hclge_dev *hdev)
+{
+	struct hclge_comm_cmq_ring *crq = &hdev->hw.hw.cmq.crq;
+	struct hclge_respond_to_vf_msg resp_msg;
+	struct hclge_mbx_vf_to_pf_cmd *req;
+	struct hclge_mbx_ops_param param;
+	struct hclge_desc *desc;
+	unsigned int flag;
 
+	param.resp_msg = &resp_msg;
+	/* handle all the mailbox requests in the queue */
+	while (!hclge_cmd_crq_empty(&hdev->hw)) {
+		if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE,
+			     &hdev->hw.hw.comm_state)) {
+			dev_warn(&hdev->pdev->dev,
+				 "command queue needs re-initializing\n");
+			return;
+		}
+
+		desc = &crq->desc[crq->next_to_use];
+		req = (struct hclge_mbx_vf_to_pf_cmd *)desc->data;
+
+		flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
+		if (unlikely(!hnae3_get_bit(flag, HCLGE_CMDQ_RX_OUTVLD_B))) {
+			dev_warn(&hdev->pdev->dev,
+				 "dropped invalid mailbox message, code = %u\n",
+				 req->msg.code);
+
+			/* dropping/not processing this invalid message */
 			crq->desc[crq->next_to_use].flag = 0;
 			hclge_mbx_ring_ptr_move_crq(crq);
+			continue;
+		}
 
-		/* reinitialize ret after complete the mbx message processing */
-		ret = 0;
+		trace_hclge_pf_mbx_get(hdev, req);
+
+		/* clear the resp_msg before processing every mailbox message */
+		memset(&resp_msg, 0, sizeof(resp_msg));
+		param.vport = &hdev->vport[req->mbx_src_vfid];
+		param.req = req;
+		hclge_mbx_request_handling(&param);
+
+		crq->desc[crq->next_to_use].flag = 0;
+		hclge_mbx_ring_ptr_move_crq(crq);
 	}
 
 	/* Write back CMDQ_RQ header pointer, M7 need this pointer */