From cb7a94c9c808d291d813f90bdb53e2005324a332 Mon Sep 17 00:00:00 2001 From: "Wei Hu(Xavier)" Date: Mon, 28 May 2018 19:39:24 +0800 Subject: RDMA/hns: Add reset process for RoCE in hip08 This patch added reset process for RoCE in hip08. Signed-off-by: Wei Hu (Xavier) Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hns/hns_roce_cmd.c | 3 ++ drivers/infiniband/hw/hns/hns_roce_device.h | 2 + drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 76 +++++++++++++++++++++++++++++ drivers/infiniband/hw/hns/hns_roce_main.c | 7 +++ 4 files changed, 88 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_cmd.c b/drivers/infiniband/hw/hns/hns_roce_cmd.c index 9ebe839d8b24..a0ba19d4a10e 100644 --- a/drivers/infiniband/hw/hns/hns_roce_cmd.c +++ b/drivers/infiniband/hw/hns/hns_roce_cmd.c @@ -176,6 +176,9 @@ int hns_roce_cmd_mbox(struct hns_roce_dev *hr_dev, u64 in_param, u64 out_param, unsigned long in_modifier, u8 op_modifier, u16 op, unsigned long timeout) { + if (hr_dev->is_reset) + return 0; + if (hr_dev->cmd.use_events) return hns_roce_cmd_mbox_wait(hr_dev, in_param, out_param, in_modifier, op_modifier, op, diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h index 412297d4b86c..da8512b40252 100644 --- a/drivers/infiniband/hw/hns/hns_roce_device.h +++ b/drivers/infiniband/hw/hns/hns_roce_device.h @@ -774,6 +774,8 @@ struct hns_roce_dev { const char *irq_names[HNS_ROCE_MAX_IRQ_NUM]; spinlock_t sm_lock; spinlock_t bt_cmd_lock; + bool active; + bool is_reset; struct hns_roce_ib_iboe iboe; struct list_head pgdir_list; diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index dd716ed60661..166f0469b5f5 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -775,6 +775,9 @@ static int hns_roce_cmq_send(struct hns_roce_dev *hr_dev, int ret = 0; int ntc; + if (hr_dev->is_reset) + return 0; + spin_lock_bh(&csq->lock); if (num > hns_roce_cmq_space(csq)) { @@ -4804,14 +4807,87 @@ static void hns_roce_hw_v2_uninit_instance(struct hnae3_handle *handle, { struct hns_roce_dev *hr_dev = (struct hns_roce_dev *)handle->priv; + if (!hr_dev) + return; + hns_roce_exit(hr_dev); kfree(hr_dev->priv); ib_dealloc_device(&hr_dev->ib_dev); } +static int hns_roce_hw_v2_reset_notify_down(struct hnae3_handle *handle) +{ + struct hns_roce_dev *hr_dev = (struct hns_roce_dev *)handle->priv; + struct ib_event event; + + if (!hr_dev) { + dev_err(&handle->pdev->dev, + "Input parameter handle->priv is NULL!\n"); + return -EINVAL; + } + + hr_dev->active = false; + hr_dev->is_reset = true; + + event.event = IB_EVENT_DEVICE_FATAL; + event.device = &hr_dev->ib_dev; + event.element.port_num = 1; + ib_dispatch_event(&event); + + return 0; +} + +static int hns_roce_hw_v2_reset_notify_init(struct hnae3_handle *handle) +{ + int ret; + + ret = hns_roce_hw_v2_init_instance(handle); + if (ret) { + /* when reset notify type is HNAE3_INIT_CLIENT In reset notify + * callback function, RoCE Engine reinitialize. If RoCE reinit + * failed, we should inform NIC driver. + */ + handle->priv = NULL; + dev_err(&handle->pdev->dev, + "In reset process RoCE reinit failed %d.\n", ret); + } + + return ret; +} + +static int hns_roce_hw_v2_reset_notify_uninit(struct hnae3_handle *handle) +{ + msleep(100); + hns_roce_hw_v2_uninit_instance(handle, false); + return 0; +} + +static int hns_roce_hw_v2_reset_notify(struct hnae3_handle *handle, + enum hnae3_reset_notify_type type) +{ + int ret = 0; + + switch (type) { + case HNAE3_DOWN_CLIENT: + ret = hns_roce_hw_v2_reset_notify_down(handle); + break; + case HNAE3_INIT_CLIENT: + ret = hns_roce_hw_v2_reset_notify_init(handle); + break; + case HNAE3_UNINIT_CLIENT: + ret = hns_roce_hw_v2_reset_notify_uninit(handle); + break; + default: + break; + } + + return ret; +} + static const struct hnae3_client_ops hns_roce_hw_v2_ops = { .init_instance = hns_roce_hw_v2_init_instance, .uninit_instance = hns_roce_hw_v2_uninit_instance, + .reset_notify = hns_roce_hw_v2_reset_notify, }; static struct hnae3_client hns_roce_hw_v2_client = { diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c index c614f9182b1a..fbb0c0a857b8 100644 --- a/drivers/infiniband/hw/hns/hns_roce_main.c +++ b/drivers/infiniband/hw/hns/hns_roce_main.c @@ -332,6 +332,9 @@ static struct ib_ucontext *hns_roce_alloc_ucontext(struct ib_device *ib_dev, struct hns_roce_ib_alloc_ucontext_resp resp = {}; struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); + if (!hr_dev->active) + return ERR_PTR(-EAGAIN); + resp.qp_tab_size = hr_dev->caps.num_qps; context = kmalloc(sizeof(*context), GFP_KERNEL); @@ -425,6 +428,7 @@ static void hns_roce_unregister_device(struct hns_roce_dev *hr_dev) { struct hns_roce_ib_iboe *iboe = &hr_dev->iboe; + hr_dev->active = false; unregister_netdevice_notifier(&iboe->nb); ib_unregister_device(&hr_dev->ib_dev); } @@ -536,6 +540,7 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev) goto error_failed_setup_mtu_mac; } + hr_dev->active = true; return 0; error_failed_setup_mtu_mac: @@ -728,6 +733,7 @@ int hns_roce_init(struct hns_roce_dev *hr_dev) return ret; } } + hr_dev->is_reset = false; if (hr_dev->hw->cmq_init) { ret = hr_dev->hw->cmq_init(hr_dev); @@ -827,6 +833,7 @@ EXPORT_SYMBOL_GPL(hns_roce_init); void hns_roce_exit(struct hns_roce_dev *hr_dev) { hns_roce_unregister_device(hr_dev); + if (hr_dev->hw->hw_exit) hr_dev->hw->hw_exit(hr_dev); hns_roce_cleanup_bitmap(hr_dev); -- cgit v1.2.3