From 6ae4e733cdd4e0e6e7069abe40197fc456e2eeea Mon Sep 17 00:00:00 2001 From: Shiju Jose Date: Fri, 19 Oct 2018 20:15:27 +0100 Subject: [PATCH] net: hns3: Add PCIe AER error recovery This patch adds the error recovery for the HNS hw errors. Signed-off-by: Shiju Jose Signed-off-by: Salil Mehta Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hnae3.h | 2 +- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 20 ++++++++++++++++++- .../hisilicon/hns3/hns3pf/hclge_main.c | 17 ++++++++++++---- .../hisilicon/hns3/hns3vf/hclgevf_main.c | 3 ++- 4 files changed, 35 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h index 2af3a2dc72b2..e82e4ca20620 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h +++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h @@ -402,7 +402,7 @@ struct hnae3_ae_ops { int (*set_vf_vlan_filter)(struct hnae3_handle *handle, int vfid, u16 vlan, u8 qos, __be16 proto); int (*enable_hw_strip_rxvtag)(struct hnae3_handle *handle, bool enable); - void (*reset_event)(struct hnae3_handle *handle); + void (*reset_event)(struct pci_dev *pdev, struct hnae3_handle *handle); void (*get_channels)(struct hnae3_handle *handle, struct ethtool_channels *ch); void (*get_tqps_and_rss_info)(struct hnae3_handle *h, diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 3c6fa39831e3..32f3aca814e7 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -1613,7 +1614,7 @@ static void hns3_nic_net_timeout(struct net_device *ndev) /* request the reset */ if (h->ae_algo->ops->reset_event) - h->ae_algo->ops->reset_event(h); + h->ae_algo->ops->reset_event(h->pdev, h); } static const struct net_device_ops hns3_nic_netdev_ops = { @@ -1796,8 +1797,25 @@ static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev, return ret; } +static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev) +{ + struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev); + struct device *dev = &pdev->dev; + + dev_info(dev, "requesting reset due to PCI error\n"); + + /* request the reset */ + if (ae_dev->ops->reset_event) { + ae_dev->ops->reset_event(pdev, NULL); + return PCI_ERS_RESULT_RECOVERED; + } + + return PCI_ERS_RESULT_DISCONNECT; +} + static const struct pci_error_handlers hns3_err_handler = { .error_detected = hns3_error_detected, + .slot_reset = hns3_slot_reset, }; static struct pci_driver hns3_driver = { diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 94d36787b4c9..50753658b8d7 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -2489,12 +2489,18 @@ static void hclge_reset(struct hclge_dev *hdev) ae_dev->reset_type = HNAE3_NONE_RESET; } -static void hclge_reset_event(struct hnae3_handle *handle) +static void hclge_reset_event(struct pci_dev *pdev, struct hnae3_handle *handle) { - struct hclge_vport *vport = hclge_get_vport(handle); - struct hclge_dev *hdev = vport->back; + struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev); + struct hclge_dev *hdev = ae_dev->priv; - /* check if this is a new reset request and we are not here just because + /* We might end up getting called broadly because of 2 below cases: + * 1. Recoverable error was conveyed through APEI and only way to bring + * normalcy is to reset. + * 2. A new reset request from the stack due to timeout + * + * For the first case,error event might not have ae handle available. + * check if this is a new reset request and we are not here just because * last reset attempt did not succeed and watchdog hit us again. We will * know this if last reset request did not occur very recently (watchdog * timer = 5*HZ, let us check after sufficiently large time, say 4*5*Hz) @@ -2503,6 +2509,9 @@ static void hclge_reset_event(struct hnae3_handle *handle) * want to make sure we throttle the reset request. Therefore, we will * not allow it again before 3*HZ times. */ + if (!handle) + handle = &hdev->vport[0].nic; + if (time_before(jiffies, (handle->last_reset_time + 3 * HZ))) return; else if (time_after(jiffies, (handle->last_reset_time + 4 * 5 * HZ))) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c index ac67fecb9408..e0a86a58342c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c @@ -1214,7 +1214,8 @@ static int hclgevf_do_reset(struct hclgevf_dev *hdev) return status; } -static void hclgevf_reset_event(struct hnae3_handle *handle) +static void hclgevf_reset_event(struct pci_dev *pdev, + struct hnae3_handle *handle) { struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle); -- 2.30.2