net: hns3: provide some interface & information for the client

The client needs to know if the hardware is resetting when
loading or unloading itself, because client may abort the loading
process or wait for the reset process to finish when unloading
if hardware is resetting.

So this patch provides these interfaces to do it.
1. get_hw_reset_stat, the reset status of hardware.
2. ae_dev_resetting, whether reset task is scheduling.
3. ae_dev_reset_cnt, how many reset has been done.

Also, the RoCE client needs some field in the hnae3_roce_private_info
to save its state, and process_hw_error interface in the
hnae3_client_ops to process hardware errors.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 5e6006b6ed1a..b6695424805b 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2466,6 +2466,7 @@ static void hclge_reset(struct hclge_dev *hdev)
 	 * know if device is undergoing reset
 	 */
 	ae_dev->reset_type = hdev->reset_type;
+	hdev->reset_count++;
 	/* perform reset of the stack & ae device for a client */
 	handle = &hdev->vport[0].nic;
 	rtnl_lock();
@@ -4604,6 +4605,31 @@ static int hclge_get_all_rules(struct hnae3_handle *handle,
 	return 0;
 }
 
+static bool hclge_get_hw_reset_stat(struct hnae3_handle *handle)
+{
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_dev *hdev = vport->back;
+
+	return hclge_read_dev(&hdev->hw, HCLGE_GLOBAL_RESET_REG) ||
+	       hclge_read_dev(&hdev->hw, HCLGE_FUN_RST_ING);
+}
+
+static bool hclge_ae_dev_resetting(struct hnae3_handle *handle)
+{
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_dev *hdev = vport->back;
+
+	return test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
+}
+
+static unsigned long hclge_ae_dev_reset_cnt(struct hnae3_handle *handle)
+{
+	struct hclge_vport *vport = hclge_get_vport(handle);
+	struct hclge_dev *hdev = vport->back;
+
+	return hdev->reset_count;
+}
+
 static void hclge_enable_fd(struct hnae3_handle *handle, bool enable)
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
@@ -7350,6 +7376,9 @@ static const struct hnae3_ae_ops hclge_ops = {
 	.restore_fd_rules = hclge_restore_fd_entries,
 	.enable_fd = hclge_enable_fd,
 	.process_hw_error = hclge_process_ras_hw_error,
+	.get_hw_reset_stat = hclge_get_hw_reset_stat,
+	.ae_dev_resetting = hclge_ae_dev_resetting,
+	.ae_dev_reset_cnt = hclge_ae_dev_reset_cnt,
 };
 
 static struct hnae3_ae_algo ae_algo = {