Merge branch 'hns3-cleanups'

Huazhong Tan says:

====================
net: hns3: some cleanups for -next

To improve code readability and maintainability, the series
refactor out some bloated functions in the HNS3 ethernet driver.

change log:
V2: remove an unused variable in #5

previous version:
V1: https://patchwork.kernel.org/project/netdevbpf/cover/1612943005-59416-1-git-send-email-tanhuazhong@huawei.com/
====================

Acked-by: Jakub Kicinski <kuba@kernel.org>

Author: davem330

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -423,14 +423,38 @@ static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,
 	return (*ppos = len);
 }
 
+static int hns3_dbg_check_cmd(struct hnae3_handle *handle, char *cmd_buf)
+{
+	int ret = 0;
+
+	if (strncmp(cmd_buf, "help", 4) == 0)
+		hns3_dbg_help(handle);
+	else if (strncmp(cmd_buf, "queue info", 10) == 0)
+		ret = hns3_dbg_queue_info(handle, cmd_buf);
+	else if (strncmp(cmd_buf, "queue map", 9) == 0)
+		ret = hns3_dbg_queue_map(handle);
+	else if (strncmp(cmd_buf, "bd info", 7) == 0)
+		ret = hns3_dbg_bd_info(handle, cmd_buf);
+	else if (strncmp(cmd_buf, "dev capability", 14) == 0)
+		hns3_dbg_dev_caps(handle);
+	else if (strncmp(cmd_buf, "dev spec", 8) == 0)
+		hns3_dbg_dev_specs(handle);
+	else if (handle->ae_algo->ops->dbg_run_cmd)
+		ret = handle->ae_algo->ops->dbg_run_cmd(handle, cmd_buf);
+	else
+		ret = -EOPNOTSUPP;
+
+	return ret;
+}
+
 static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer,
 				  size_t count, loff_t *ppos)
 {
 	struct hnae3_handle *handle = filp->private_data;
 	struct hns3_nic_priv *priv  = handle->priv;
 	char *cmd_buf, *cmd_buf_tmp;
 	int uncopied_bytes;
-	int ret = 0;
+	int ret;
 
 	if (*ppos != 0)
 		return 0;
@@ -461,23 +485,7 @@ static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer,
 		count = cmd_buf_tmp - cmd_buf + 1;
 	}
 
-	if (strncmp(cmd_buf, "help", 4) == 0)
-		hns3_dbg_help(handle);
-	else if (strncmp(cmd_buf, "queue info", 10) == 0)
-		ret = hns3_dbg_queue_info(handle, cmd_buf);
-	else if (strncmp(cmd_buf, "queue map", 9) == 0)
-		ret = hns3_dbg_queue_map(handle);
-	else if (strncmp(cmd_buf, "bd info", 7) == 0)
-		ret = hns3_dbg_bd_info(handle, cmd_buf);
-	else if (strncmp(cmd_buf, "dev capability", 14) == 0)
-		hns3_dbg_dev_caps(handle);
-	else if (strncmp(cmd_buf, "dev spec", 8) == 0)
-		hns3_dbg_dev_specs(handle);
-	else if (handle->ae_algo->ops->dbg_run_cmd)
-		ret = handle->ae_algo->ops->dbg_run_cmd(handle, cmd_buf);
-	else
-		ret = -EOPNOTSUPP;
-
+	ret = hns3_dbg_check_cmd(handle, cmd_buf);
 	if (ret)
 		hns3_dbg_help(handle);
 

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

@@ -189,38 +189,53 @@ static bool hclge_is_special_opcode(u16 opcode)
 	return false;
 }
 
-static int hclge_cmd_convert_err_code(u16 desc_ret)
+struct errcode {
+	u32 imp_errcode;
+	int common_errno;
+};
+
+static void hclge_cmd_copy_desc(struct hclge_hw *hw, struct hclge_desc *desc,
+				int num)
 {
-	switch (desc_ret) {
-	case HCLGE_CMD_EXEC_SUCCESS:
-		return 0;
-	case HCLGE_CMD_NO_AUTH:
-		return -EPERM;
-	case HCLGE_CMD_NOT_SUPPORTED:
-		return -EOPNOTSUPP;
-	case HCLGE_CMD_QUEUE_FULL:
-		return -EXFULL;
-	case HCLGE_CMD_NEXT_ERR:
-		return -ENOSR;
-	case HCLGE_CMD_UNEXE_ERR:
-		return -ENOTBLK;
-	case HCLGE_CMD_PARA_ERR:
-		return -EINVAL;
-	case HCLGE_CMD_RESULT_ERR:
-		return -ERANGE;
-	case HCLGE_CMD_TIMEOUT:
-		return -ETIME;
-	case HCLGE_CMD_HILINK_ERR:
-		return -ENOLINK;
-	case HCLGE_CMD_QUEUE_ILLEGAL:
-		return -ENXIO;
-	case HCLGE_CMD_INVALID:
-		return -EBADR;
-	default:
-		return -EIO;
+	struct hclge_desc *desc_to_use;
+	int handle = 0;
+
+	while (handle < num) {
+		desc_to_use = &hw->cmq.csq.desc[hw->cmq.csq.next_to_use];
+		*desc_to_use = desc[handle];
+		(hw->cmq.csq.next_to_use)++;
+		if (hw->cmq.csq.next_to_use >= hw->cmq.csq.desc_num)
+			hw->cmq.csq.next_to_use = 0;
+		handle++;
 	}
 }
 
+static int hclge_cmd_convert_err_code(u16 desc_ret)
+{
+	struct errcode hclge_cmd_errcode[] = {
+		{HCLGE_CMD_EXEC_SUCCESS, 0},
+		{HCLGE_CMD_NO_AUTH, -EPERM},
+		{HCLGE_CMD_NOT_SUPPORTED, -EOPNOTSUPP},
+		{HCLGE_CMD_QUEUE_FULL, -EXFULL},
+		{HCLGE_CMD_NEXT_ERR, -ENOSR},
+		{HCLGE_CMD_UNEXE_ERR, -ENOTBLK},
+		{HCLGE_CMD_PARA_ERR, -EINVAL},
+		{HCLGE_CMD_RESULT_ERR, -ERANGE},
+		{HCLGE_CMD_TIMEOUT, -ETIME},
+		{HCLGE_CMD_HILINK_ERR, -ENOLINK},
+		{HCLGE_CMD_QUEUE_ILLEGAL, -ENXIO},
+		{HCLGE_CMD_INVALID, -EBADR},
+	};
+	u32 errcode_count = ARRAY_SIZE(hclge_cmd_errcode);
+	u32 i;
+
+	for (i = 0; i < errcode_count; i++)
+		if (hclge_cmd_errcode[i].imp_errcode == desc_ret)
+			return hclge_cmd_errcode[i].common_errno;
+
+	return -EIO;
+}
+
 static int hclge_cmd_check_retval(struct hclge_hw *hw, struct hclge_desc *desc,
 				  int num, int ntc)
 {
@@ -244,6 +259,44 @@ static int hclge_cmd_check_retval(struct hclge_hw *hw, struct hclge_desc *desc,
 	return hclge_cmd_convert_err_code(desc_ret);
 }
 
+static int hclge_cmd_check_result(struct hclge_hw *hw, struct hclge_desc *desc,
+				  int num, int ntc)
+{
+	struct hclge_dev *hdev = container_of(hw, struct hclge_dev, hw);
+	bool is_completed = false;
+	u32 timeout = 0;
+	int handle, ret;
+
+	/**
+	 * If the command is sync, wait for the firmware to write back,
+	 * if multi descriptors to be sent, use the first one to check
+	 */
+	if (HCLGE_SEND_SYNC(le16_to_cpu(desc->flag))) {
+		do {
+			if (hclge_cmd_csq_done(hw)) {
+				is_completed = true;
+				break;
+			}
+			udelay(1);
+			timeout++;
+		} while (timeout < hw->cmq.tx_timeout);
+	}
+
+	if (!is_completed)
+		ret = -EBADE;
+	else
+		ret = hclge_cmd_check_retval(hw, desc, num, ntc);
+
+	/* Clean the command send queue */
+	handle = hclge_cmd_csq_clean(hw);
+	if (handle < 0)
+		ret = handle;
+	else if (handle != num)
+		dev_warn(&hdev->pdev->dev,
+			 "cleaned %d, need to clean %d\n", handle, num);
+	return ret;
+}
+
 /**
  * hclge_cmd_send - send command to command queue
  * @hw: pointer to the hw struct
@@ -257,11 +310,7 @@ int hclge_cmd_send(struct hclge_hw *hw, struct hclge_desc *desc, int num)
 {
 	struct hclge_dev *hdev = container_of(hw, struct hclge_dev, hw);
 	struct hclge_cmq_ring *csq = &hw->cmq.csq;
-	struct hclge_desc *desc_to_use;
-	bool complete = false;
-	u32 timeout = 0;
-	int handle = 0;
-	int retval;
+	int ret;
 	int ntc;
 
 	spin_lock_bh(&hw->cmq.csq.lock);
@@ -285,49 +334,17 @@ int hclge_cmd_send(struct hclge_hw *hw, struct hclge_desc *desc, int num)
 	 * which will be use for hardware to write back
 	 */
 	ntc = hw->cmq.csq.next_to_use;
-	while (handle < num) {
-		desc_to_use = &hw->cmq.csq.desc[hw->cmq.csq.next_to_use];
-		*desc_to_use = desc[handle];
-		(hw->cmq.csq.next_to_use)++;
-		if (hw->cmq.csq.next_to_use >= hw->cmq.csq.desc_num)
-			hw->cmq.csq.next_to_use = 0;
-		handle++;
-	}
+
+	hclge_cmd_copy_desc(hw, desc, num);
 
 	/* Write to hardware */
 	hclge_write_dev(hw, HCLGE_NIC_CSQ_TAIL_REG, hw->cmq.csq.next_to_use);
 
-	/**
-	 * If the command is sync, wait for the firmware to write back,
-	 * if multi descriptors to be sent, use the first one to check
-	 */
-	if (HCLGE_SEND_SYNC(le16_to_cpu(desc->flag))) {
-		do {
-			if (hclge_cmd_csq_done(hw)) {
-				complete = true;
-				break;
-			}
-			udelay(1);
-			timeout++;
-		} while (timeout < hw->cmq.tx_timeout);
-	}
-
-	if (!complete)
-		retval = -EBADE;
-	else
-		retval = hclge_cmd_check_retval(hw, desc, num, ntc);
-
-	/* Clean the command send queue */
-	handle = hclge_cmd_csq_clean(hw);
-	if (handle < 0)
-		retval = handle;
-	else if (handle != num)
-		dev_warn(&hdev->pdev->dev,
-			 "cleaned %d, need to clean %d\n", handle, num);
+	ret = hclge_cmd_check_result(hw, desc, num, ntc);
 
 	spin_unlock_bh(&hw->cmq.csq.lock);
 
-	return retval;
+	return ret;
 }
 
 static void hclge_set_default_capability(struct hclge_dev *hdev)