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Date: Fri, 12 Feb 2021 11:24:13 +0800
From: Huazhong Tan <tanhuazhong@...wei.com>
To: <davem@...emloft.net>, <kuba@...nel.org>
CC: <netdev@...r.kernel.org>, <salil.mehta@...wei.com>,
<yisen.zhuang@...wei.com>, <huangdaode@...wei.com>,
<linuxarm@...neuler.org>, Yufeng Mo <moyufeng@...wei.com>,
Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH V2 net-next 09/13] net: hns3: split out hclge_cmd_send()
From: Yufeng Mo <moyufeng@...wei.com>
hclge_cmd_send() is bloated, so split it into separate
functions for readability and maintainability.
Signed-off-by: Yufeng Mo <moyufeng@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
.../hisilicon/hns3/hns3pf/hclge_cmd.c | 100 +++++++++++-------
1 file changed, 59 insertions(+), 41 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
index cb2c955ce52c..1bd0ddfaec4d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
@@ -194,6 +194,22 @@ struct errcode {
int common_errno;
};
+static void hclge_cmd_copy_desc(struct hclge_hw *hw, struct hclge_desc *desc,
+ int num)
+{
+ 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[] = {
@@ -243,6 +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
@@ -256,11 +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);
@@ -284,49 +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)
--
2.25.1
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