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net: hns3: stop handling command queue while resetting VF

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According to hardware's description, after the reset occurs, the driver
needs to re-initialize the command queue before sending and receiving
any commands. Therefore, the VF's driver needs to identify the command
queue needs to re-initialize with HCLGEVF_STATE_CMD_DISABLE, and does
not allow sending or receiving commands before the re-initialization.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2018-11-09 22:07:50 +08:00 committed by David S. Miller
parent b90fcc5bd9
commit ef5f8e507e
4 changed files with 35 additions and 1 deletions
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13
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
View File

@ -189,7 +189,8 @@ int hclgevf_cmd_send(struct hclgevf_hw *hw, struct hclgevf_desc *desc, int num)
spin_lock_bh(&hw->cmq.csq.lock);
if (num > hclgevf_ring_space(&hw->cmq.csq)) {
if (num > hclgevf_ring_space(&hw->cmq.csq) ||
test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) {
spin_unlock_bh(&hw->cmq.csq.lock);
return -EBUSY;
}
@ -338,6 +339,16 @@ int hclgevf_cmd_init(struct hclgevf_dev *hdev)
spin_unlock_bh(&hdev->hw.cmq.crq.lock);
spin_unlock_bh(&hdev->hw.cmq.csq.lock);
clear_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
/* Check if there is new reset pending, because the higher level
* reset may happen when lower level reset is being processed.
*/
if (hclgevf_is_reset_pending(hdev)) {
set_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
return -EBUSY;
}
/* get firmware version */
ret = hclgevf_cmd_query_firmware_version(&hdev->hw, &version);
if (ret) {

3
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
View File

@ -1162,6 +1162,8 @@ static int hclgevf_reset_prepare_wait(struct hclgevf_dev *hdev)
break;
}
set_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
dev_info(&hdev->pdev->dev, "prepare reset(%d) wait done, ret:%d\n",
hdev->reset_type, ret);
@ -1467,6 +1469,7 @@ static enum hclgevf_evt_cause hclgevf_check_evt_cause(struct hclgevf_dev *hdev,
"receive reset interrupt 0x%x!\n", rst_ing_reg);
set_bit(HNAE3_VF_RESET, &hdev->reset_pending);
set_bit(HCLGEVF_RESET_PENDING, &hdev->reset_state);
set_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
cmdq_src_reg &= ~BIT(HCLGEVF_VECTOR0_RST_INT_B);
*clearval = cmdq_src_reg;
return HCLGEVF_VECTOR0_EVENT_RST;

6
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h
View File

@ -79,6 +79,7 @@ enum hclgevf_states {
HCLGEVF_STATE_RST_HANDLING,
HCLGEVF_STATE_MBX_SERVICE_SCHED,
HCLGEVF_STATE_MBX_HANDLING,
HCLGEVF_STATE_CMD_DISABLE,
};
#define HCLGEVF_MPF_ENBALE 1
@ -212,6 +213,11 @@ struct hclgevf_dev {
u32 flag;
};
static inline bool hclgevf_is_reset_pending(struct hclgevf_dev *hdev)
{
return !!hdev->reset_pending;
}
int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, u16 code, u16 subcode,
const u8 *msg_data, u8 msg_len, bool need_resp,
u8 *resp_data, u16 resp_len);

14
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
View File

@ -40,6 +40,9 @@ static int hclgevf_get_mbx_resp(struct hclgevf_dev *hdev, u16 code0, u16 code1,
}
while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) {
if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state))
return -EIO;
udelay(HCLGEVF_SLEEP_USCOEND);
i++;
}
@ -148,6 +151,11 @@ void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
crq = &hdev->hw.cmq.crq;
while (!hclgevf_cmd_crq_empty(&hdev->hw)) {
if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) {
dev_info(&hdev->pdev->dev, "vf crq need init\n");
return;
}
desc = &crq->desc[crq->next_to_use];
req = (struct hclge_mbx_pf_to_vf_cmd *)desc->data;
@ -249,6 +257,12 @@ void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev)
/* process all the async queue messages */
while (tail != hdev->arq.head) {
if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) {
dev_info(&hdev->pdev->dev,
"vf crq need init in async\n");
return;
}
msg_q = hdev->arq.msg_q[hdev->arq.head];
switch (msg_q[0]) {