nvme: move reset workqueue handling to common code
This moves the nvme_reset function from the PCIe driver to common code, renaming it to nvme_reset_ctrl in the process. Additionally a new helper nvme_reset_ctrl_sync is added for the case where we want to wait for the reset. To facilitate that the reset_work work structure is move to the common nvme_ctrl structure and the ->reset_ctrl method is removed. For now the drivers initialize the reset_work with their own callback, but longer term we should move to callouts for specific parts of the reset process and move even more code to the core. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>hifive-unleashed-5.1
Christoph Hellwig
parent
0350815a90
commit
d86c4d8ef3
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@ -73,6 +73,26 @@ static DEFINE_SPINLOCK(dev_list_lock);
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static struct class *nvme_class;
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int nvme_reset_ctrl(struct nvme_ctrl *ctrl)
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{
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if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING))
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return -EBUSY;
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if (!queue_work(nvme_wq, &ctrl->reset_work))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL_GPL(nvme_reset_ctrl);
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static int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
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{
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int ret;
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ret = nvme_reset_ctrl(ctrl);
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if (!ret)
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flush_work(&ctrl->reset_work);
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return ret;
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}
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static blk_status_t nvme_error_status(struct request *req)
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{
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switch (nvme_req(req)->status & 0x7ff) {
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@ -604,7 +624,7 @@ static void nvme_keep_alive_work(struct work_struct *work)
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if (nvme_keep_alive(ctrl)) {
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/* allocation failure, reset the controller */
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dev_err(ctrl->device, "keep-alive failed\n");
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ctrl->ops->reset_ctrl(ctrl);
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nvme_reset_ctrl_sync(ctrl);
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return;
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}
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}
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@ -1821,7 +1841,7 @@ static long nvme_dev_ioctl(struct file *file, unsigned int cmd,
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return nvme_dev_user_cmd(ctrl, argp);
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case NVME_IOCTL_RESET:
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dev_warn(ctrl->device, "resetting controller\n");
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return ctrl->ops->reset_ctrl(ctrl);
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return nvme_reset_ctrl_sync(ctrl);
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case NVME_IOCTL_SUBSYS_RESET:
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return nvme_reset_subsystem(ctrl);
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case NVME_IOCTL_RESCAN:
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@ -1847,7 +1867,7 @@ static ssize_t nvme_sysfs_reset(struct device *dev,
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struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
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int ret;
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ret = ctrl->ops->reset_ctrl(ctrl);
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ret = nvme_reset_ctrl_sync(ctrl);
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if (ret < 0)
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return ret;
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return count;
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@ -161,7 +161,6 @@ struct nvme_fc_ctrl {
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struct blk_mq_tag_set tag_set;
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struct work_struct delete_work;
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struct work_struct reset_work;
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struct delayed_work connect_work;
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struct kref ref;
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@ -1764,10 +1763,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
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return;
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}
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if (!queue_work(nvme_wq, &ctrl->reset_work))
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dev_err(ctrl->ctrl.device,
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"NVME-FC{%d}: error_recovery: Failed to schedule "
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"reset work\n", ctrl->cnum);
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nvme_reset_ctrl(&ctrl->ctrl);
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}
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static enum blk_eh_timer_return
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@ -2517,7 +2513,7 @@ nvme_fc_delete_ctrl_work(struct work_struct *work)
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struct nvme_fc_ctrl *ctrl =
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container_of(work, struct nvme_fc_ctrl, delete_work);
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cancel_work_sync(&ctrl->reset_work);
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cancel_work_sync(&ctrl->ctrl.reset_work);
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cancel_delayed_work_sync(&ctrl->connect_work);
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/*
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@ -2611,7 +2607,7 @@ static void
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nvme_fc_reset_ctrl_work(struct work_struct *work)
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{
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struct nvme_fc_ctrl *ctrl =
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container_of(work, struct nvme_fc_ctrl, reset_work);
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container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
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int ret;
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/* will block will waiting for io to terminate */
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@ -2625,29 +2621,6 @@ nvme_fc_reset_ctrl_work(struct work_struct *work)
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"NVME-FC{%d}: controller reset complete\n", ctrl->cnum);
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}
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/*
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* called by the nvme core layer, for sysfs interface that requests
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* a reset of the nvme controller
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*/
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static int
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nvme_fc_reset_nvme_ctrl(struct nvme_ctrl *nctrl)
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{
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struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
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dev_info(ctrl->ctrl.device,
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"NVME-FC{%d}: admin requested controller reset\n", ctrl->cnum);
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if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING))
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return -EBUSY;
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if (!queue_work(nvme_wq, &ctrl->reset_work))
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return -EBUSY;
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flush_work(&ctrl->reset_work);
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return 0;
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}
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static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
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.name = "fc",
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.module = THIS_MODULE,
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@ -2655,7 +2628,6 @@ static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
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.reg_read32 = nvmf_reg_read32,
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.reg_read64 = nvmf_reg_read64,
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.reg_write32 = nvmf_reg_write32,
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.reset_ctrl = nvme_fc_reset_nvme_ctrl,
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.free_ctrl = nvme_fc_nvme_ctrl_freed,
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.submit_async_event = nvme_fc_submit_async_event,
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.delete_ctrl = nvme_fc_del_nvme_ctrl,
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@ -2730,7 +2702,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
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kref_init(&ctrl->ref);
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INIT_WORK(&ctrl->delete_work, nvme_fc_delete_ctrl_work);
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INIT_WORK(&ctrl->reset_work, nvme_fc_reset_ctrl_work);
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INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work);
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INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work);
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spin_lock_init(&ctrl->lock);
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@ -130,6 +130,7 @@ struct nvme_ctrl {
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struct device *device; /* char device */
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struct list_head node;
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struct ida ns_ida;
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struct work_struct reset_work;
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struct opal_dev *opal_dev;
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@ -218,7 +219,6 @@ struct nvme_ctrl_ops {
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int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
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int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
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int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
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int (*reset_ctrl)(struct nvme_ctrl *ctrl);
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void (*free_ctrl)(struct nvme_ctrl *ctrl);
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void (*submit_async_event)(struct nvme_ctrl *ctrl, int aer_idx);
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int (*delete_ctrl)(struct nvme_ctrl *ctrl);
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@ -325,6 +325,7 @@ int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
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int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
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void nvme_start_keep_alive(struct nvme_ctrl *ctrl);
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void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
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int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
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struct sg_io_hdr;
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@ -61,7 +61,6 @@ MODULE_PARM_DESC(max_host_mem_size_mb,
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struct nvme_dev;
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struct nvme_queue;
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static int nvme_reset(struct nvme_dev *dev);
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static void nvme_process_cq(struct nvme_queue *nvmeq);
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static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown);
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@ -83,7 +82,6 @@ struct nvme_dev {
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u32 db_stride;
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void __iomem *bar;
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unsigned long bar_mapped_size;
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struct work_struct reset_work;
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struct work_struct remove_work;
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struct mutex shutdown_lock;
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bool subsystem;
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@ -983,7 +981,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
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if (nvme_should_reset(dev, csts)) {
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nvme_warn_reset(dev, csts);
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nvme_dev_disable(dev, false);
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nvme_reset(dev);
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nvme_reset_ctrl(&dev->ctrl);
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return BLK_EH_HANDLED;
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}
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@ -1022,7 +1020,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
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"I/O %d QID %d timeout, reset controller\n",
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req->tag, nvmeq->qid);
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nvme_dev_disable(dev, false);
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nvme_reset(dev);
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nvme_reset_ctrl(&dev->ctrl);
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/*
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* Mark the request as handled, since the inline shutdown
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@ -2055,7 +2053,8 @@ static void nvme_remove_dead_ctrl(struct nvme_dev *dev, int status)
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static void nvme_reset_work(struct work_struct *work)
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{
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struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work);
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struct nvme_dev *dev =
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container_of(work, struct nvme_dev, ctrl.reset_work);
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bool was_suspend = !!(dev->ctrl.ctrl_config & NVME_CC_SHN_NORMAL);
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int result = -ENODEV;
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@ -2159,17 +2158,6 @@ static void nvme_remove_dead_ctrl_work(struct work_struct *work)
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nvme_put_ctrl(&dev->ctrl);
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}
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static int nvme_reset(struct nvme_dev *dev)
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{
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if (!dev->ctrl.admin_q || blk_queue_dying(dev->ctrl.admin_q))
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return -ENODEV;
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if (!nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING))
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return -EBUSY;
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if (!queue_work(nvme_wq, &dev->reset_work))
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return -EBUSY;
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return 0;
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}
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static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val)
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{
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*val = readl(to_nvme_dev(ctrl)->bar + off);
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@ -2188,16 +2176,6 @@ static int nvme_pci_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val)
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return 0;
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}
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static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl)
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{
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struct nvme_dev *dev = to_nvme_dev(ctrl);
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int ret = nvme_reset(dev);
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if (!ret)
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flush_work(&dev->reset_work);
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return ret;
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}
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static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
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.name = "pcie",
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.module = THIS_MODULE,
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@ -2205,7 +2183,6 @@ static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
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.reg_read32 = nvme_pci_reg_read32,
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.reg_write32 = nvme_pci_reg_write32,
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.reg_read64 = nvme_pci_reg_read64,
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.reset_ctrl = nvme_pci_reset_ctrl,
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.free_ctrl = nvme_pci_free_ctrl,
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.submit_async_event = nvme_pci_submit_async_event,
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};
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@ -2271,7 +2248,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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if (result)
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goto free;
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INIT_WORK(&dev->reset_work, nvme_reset_work);
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INIT_WORK(&dev->ctrl.reset_work, nvme_reset_work);
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INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work);
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mutex_init(&dev->shutdown_lock);
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init_completion(&dev->ioq_wait);
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@ -2290,7 +2267,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_RESETTING);
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dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev));
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queue_work(nvme_wq, &dev->reset_work);
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queue_work(nvme_wq, &dev->ctrl.reset_work);
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return 0;
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release_pools:
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@ -2311,7 +2288,7 @@ static void nvme_reset_notify(struct pci_dev *pdev, bool prepare)
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if (prepare)
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nvme_dev_disable(dev, false);
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else
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nvme_reset(dev);
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nvme_reset_ctrl(&dev->ctrl);
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}
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static void nvme_shutdown(struct pci_dev *pdev)
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@ -2331,7 +2308,7 @@ static void nvme_remove(struct pci_dev *pdev)
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nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING);
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cancel_work_sync(&dev->reset_work);
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cancel_work_sync(&dev->ctrl.reset_work);
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pci_set_drvdata(pdev, NULL);
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if (!pci_device_is_present(pdev)) {
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@ -2339,7 +2316,7 @@ static void nvme_remove(struct pci_dev *pdev)
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nvme_dev_disable(dev, false);
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}
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flush_work(&dev->reset_work);
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flush_work(&dev->ctrl.reset_work);
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nvme_uninit_ctrl(&dev->ctrl);
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nvme_dev_disable(dev, true);
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nvme_free_host_mem(dev);
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@ -2383,7 +2360,7 @@ static int nvme_resume(struct device *dev)
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struct pci_dev *pdev = to_pci_dev(dev);
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struct nvme_dev *ndev = pci_get_drvdata(pdev);
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nvme_reset(ndev);
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nvme_reset_ctrl(&ndev->ctrl);
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return 0;
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}
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#endif
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@ -2422,7 +2399,7 @@ static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev)
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dev_info(dev->ctrl.device, "restart after slot reset\n");
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pci_restore_state(pdev);
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nvme_reset(dev);
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nvme_reset_ctrl(&dev->ctrl);
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return PCI_ERS_RESULT_RECOVERED;
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}
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@ -108,7 +108,6 @@ struct nvme_rdma_ctrl {
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/* other member variables */
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struct blk_mq_tag_set tag_set;
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struct work_struct delete_work;
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struct work_struct reset_work;
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struct work_struct err_work;
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struct nvme_rdma_qe async_event_sqe;
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@ -1703,8 +1702,8 @@ static void nvme_rdma_remove_ctrl_work(struct work_struct *work)
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static void nvme_rdma_reset_ctrl_work(struct work_struct *work)
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{
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struct nvme_rdma_ctrl *ctrl = container_of(work,
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struct nvme_rdma_ctrl, reset_work);
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struct nvme_rdma_ctrl *ctrl =
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container_of(work, struct nvme_rdma_ctrl, ctrl.reset_work);
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int ret;
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bool changed;
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@ -1748,21 +1747,6 @@ del_dead_ctrl:
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WARN_ON(!queue_work(nvme_wq, &ctrl->delete_work));
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}
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static int nvme_rdma_reset_ctrl(struct nvme_ctrl *nctrl)
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{
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struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
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if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING))
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return -EBUSY;
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if (!queue_work(nvme_wq, &ctrl->reset_work))
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return -EBUSY;
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flush_work(&ctrl->reset_work);
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return 0;
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}
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static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
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.name = "rdma",
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.module = THIS_MODULE,
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@ -1770,7 +1754,6 @@ static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
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.reg_read32 = nvmf_reg_read32,
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.reg_read64 = nvmf_reg_read64,
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.reg_write32 = nvmf_reg_write32,
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.reset_ctrl = nvme_rdma_reset_ctrl,
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.free_ctrl = nvme_rdma_free_ctrl,
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.submit_async_event = nvme_rdma_submit_async_event,
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.delete_ctrl = nvme_rdma_del_ctrl,
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@ -1879,7 +1862,7 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
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nvme_rdma_reconnect_ctrl_work);
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INIT_WORK(&ctrl->err_work, nvme_rdma_error_recovery_work);
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INIT_WORK(&ctrl->delete_work, nvme_rdma_del_ctrl_work);
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INIT_WORK(&ctrl->reset_work, nvme_rdma_reset_ctrl_work);
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INIT_WORK(&ctrl->ctrl.reset_work, nvme_rdma_reset_ctrl_work);
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ctrl->queue_count = opts->nr_io_queues + 1; /* +1 for admin queue */
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ctrl->ctrl.sqsize = opts->queue_size - 1;
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@ -58,7 +58,6 @@ struct nvme_loop_ctrl {
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struct nvmet_ctrl *target_ctrl;
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struct work_struct delete_work;
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struct work_struct reset_work;
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};
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static inline struct nvme_loop_ctrl *to_loop_ctrl(struct nvme_ctrl *ctrl)
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@ -150,7 +149,7 @@ nvme_loop_timeout(struct request *rq, bool reserved)
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struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(rq);
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/* queue error recovery */
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queue_work(nvme_wq, &iod->queue->ctrl->reset_work);
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nvme_reset_ctrl(&iod->queue->ctrl->ctrl);
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/* fail with DNR on admin cmd timeout */
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nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
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|
@ -494,8 +493,8 @@ static void nvme_loop_delete_ctrl(struct nvmet_ctrl *nctrl)
|
|||
|
||||
static void nvme_loop_reset_ctrl_work(struct work_struct *work)
|
||||
{
|
||||
struct nvme_loop_ctrl *ctrl = container_of(work,
|
||||
struct nvme_loop_ctrl, reset_work);
|
||||
struct nvme_loop_ctrl *ctrl =
|
||||
container_of(work, struct nvme_loop_ctrl, ctrl.reset_work);
|
||||
bool changed;
|
||||
int ret;
|
||||
|
||||
|
|
@ -533,21 +532,6 @@ out_disable:
|
|||
nvme_put_ctrl(&ctrl->ctrl);
|
||||
}
|
||||
|
||||
static int nvme_loop_reset_ctrl(struct nvme_ctrl *nctrl)
|
||||
{
|
||||
struct nvme_loop_ctrl *ctrl = to_loop_ctrl(nctrl);
|
||||
|
||||
if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING))
|
||||
return -EBUSY;
|
||||
|
||||
if (!queue_work(nvme_wq, &ctrl->reset_work))
|
||||
return -EBUSY;
|
||||
|
||||
flush_work(&ctrl->reset_work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
|
||||
.name = "loop",
|
||||
.module = THIS_MODULE,
|
||||
|
|
@ -555,7 +539,6 @@ static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
|
|||
.reg_read32 = nvmf_reg_read32,
|
||||
.reg_read64 = nvmf_reg_read64,
|
||||
.reg_write32 = nvmf_reg_write32,
|
||||
.reset_ctrl = nvme_loop_reset_ctrl,
|
||||
.free_ctrl = nvme_loop_free_ctrl,
|
||||
.submit_async_event = nvme_loop_submit_async_event,
|
||||
.delete_ctrl = nvme_loop_del_ctrl,
|
||||
|
|
@ -622,7 +605,7 @@ static struct nvme_ctrl *nvme_loop_create_ctrl(struct device *dev,
|
|||
INIT_LIST_HEAD(&ctrl->list);
|
||||
|
||||
INIT_WORK(&ctrl->delete_work, nvme_loop_del_ctrl_work);
|
||||
INIT_WORK(&ctrl->reset_work, nvme_loop_reset_ctrl_work);
|
||||
INIT_WORK(&ctrl->ctrl.reset_work, nvme_loop_reset_ctrl_work);
|
||||
|
||||
ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_loop_ctrl_ops,
|
||||
0 /* no quirks, we're perfect! */);
|
||||
|
|
|
|||
Loading…
Reference in New Issue