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Message-ID: <20210212032417.13076-2-tanhuazhong@huawei.com>
Date: Fri, 12 Feb 2021 11:24:14 +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 10/13] net: hns3: split out hclgevf_cmd_send()
From: Yufeng Mo <moyufeng@...wei.com>
hclgevf_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/hns3vf/hclgevf_cmd.c | 141 ++++++++++--------
1 file changed, 81 insertions(+), 60 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
index 603665e5bf39..46700c427849 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
@@ -181,6 +181,22 @@ struct vf_errcode {
int common_errno;
};
+static void hclgevf_cmd_copy_desc(struct hclgevf_hw *hw,
+ struct hclgevf_desc *desc, int num)
+{
+ struct hclgevf_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 hclgevf_cmd_convert_err_code(u16 desc_ret)
{
struct vf_errcode hclgevf_cmd_errcode[] = {
@@ -207,6 +223,66 @@ static int hclgevf_cmd_convert_err_code(u16 desc_ret)
return -EIO;
}
+static int hclgevf_cmd_check_retval(struct hclgevf_hw *hw,
+ struct hclgevf_desc *desc, int num, int ntc)
+{
+ u16 opcode, desc_ret;
+ int handle;
+
+ opcode = le16_to_cpu(desc[0].opcode);
+ for (handle = 0; handle < num; handle++) {
+ /* Get the result of hardware write back */
+ desc[handle] = hw->cmq.csq.desc[ntc];
+ ntc++;
+ if (ntc == hw->cmq.csq.desc_num)
+ ntc = 0;
+ }
+ if (likely(!hclgevf_is_special_opcode(opcode)))
+ desc_ret = le16_to_cpu(desc[num - 1].retval);
+ else
+ desc_ret = le16_to_cpu(desc[0].retval);
+ hw->cmq.last_status = desc_ret;
+
+ return hclgevf_cmd_convert_err_code(desc_ret);
+}
+
+static int hclgevf_cmd_check_result(struct hclgevf_hw *hw,
+ struct hclgevf_desc *desc, int num, int ntc)
+{
+ struct hclgevf_dev *hdev = (struct hclgevf_dev *)hw->hdev;
+ 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 (HCLGEVF_SEND_SYNC(le16_to_cpu(desc->flag))) {
+ do {
+ if (hclgevf_cmd_csq_done(hw)) {
+ is_completed = true;
+ break;
+ }
+ udelay(1);
+ timeout++;
+ } while (timeout < hw->cmq.tx_timeout);
+ }
+
+ if (!is_completed)
+ ret = -EBADE;
+ else
+ ret = hclgevf_cmd_check_retval(hw, desc, num, ntc);
+
+ /* Clean the command send queue */
+ handle = hclgevf_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;
+}
+
/* hclgevf_cmd_send - send command to command queue
* @hw: pointer to the hw struct
* @desc: prefilled descriptor for describing the command
@@ -219,13 +295,7 @@ int hclgevf_cmd_send(struct hclgevf_hw *hw, struct hclgevf_desc *desc, int num)
{
struct hclgevf_dev *hdev = (struct hclgevf_dev *)hw->hdev;
struct hclgevf_cmq_ring *csq = &hw->cmq.csq;
- struct hclgevf_desc *desc_to_use;
- bool complete = false;
- u32 timeout = 0;
- int handle = 0;
- int status = 0;
- u16 retval;
- u16 opcode;
+ int ret;
int ntc;
spin_lock_bh(&hw->cmq.csq.lock);
@@ -249,67 +319,18 @@ int hclgevf_cmd_send(struct hclgevf_hw *hw, struct hclgevf_desc *desc, int num)
* which will be use for hardware to write back
*/
ntc = hw->cmq.csq.next_to_use;
- opcode = le16_to_cpu(desc[0].opcode);
- 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++;
- }
+
+ hclgevf_cmd_copy_desc(hw, desc, num);
/* Write to hardware */
hclgevf_write_dev(hw, HCLGEVF_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 (HCLGEVF_SEND_SYNC(le16_to_cpu(desc->flag))) {
- do {
- if (hclgevf_cmd_csq_done(hw))
- break;
- udelay(1);
- timeout++;
- } while (timeout < hw->cmq.tx_timeout);
- }
-
- if (hclgevf_cmd_csq_done(hw)) {
- complete = true;
- handle = 0;
-
- while (handle < num) {
- /* Get the result of hardware write back */
- desc_to_use = &hw->cmq.csq.desc[ntc];
- desc[handle] = *desc_to_use;
-
- if (likely(!hclgevf_is_special_opcode(opcode)))
- retval = le16_to_cpu(desc[handle].retval);
- else
- retval = le16_to_cpu(desc[0].retval);
-
- status = hclgevf_cmd_convert_err_code(retval);
- hw->cmq.last_status = (enum hclgevf_cmd_status)retval;
- ntc++;
- handle++;
- if (ntc == hw->cmq.csq.desc_num)
- ntc = 0;
- }
- }
-
- if (!complete)
- status = -EBADE;
-
- /* Clean the command send queue */
- handle = hclgevf_cmd_csq_clean(hw);
- if (handle != num)
- dev_warn(&hdev->pdev->dev,
- "cleaned %d, need to clean %d\n", handle, num);
+ ret = hclgevf_cmd_check_result(hw, desc, num, ntc);
spin_unlock_bh(&hw->cmq.csq.lock);
- return status;
+ return ret;
}
static void hclgevf_set_default_capability(struct hclgevf_dev *hdev)
--
2.25.1
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