forked from Minki/linux
nvme: move namespace scanning to core
Move the scan work item and surrounding code to the common code. For now we need a new finish_scan method to allow the PCI driver to set the irq affinity hints, but I have plans in the works to obsolete this as well. Note that this moves the namespace scanning from nvme_wq to the system workqueue, but as we don't rely on namespace scanning to finish from reset or I/O this should be fine. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by Jon Derrick: <jonathan.derrick@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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parent
92911a55d4
commit
5955be2144
@ -1518,7 +1518,7 @@ static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn)
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return ret;
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}
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static void __nvme_scan_namespaces(struct nvme_ctrl *ctrl, unsigned nn)
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static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl, unsigned nn)
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{
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struct nvme_ns *ns, *next;
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unsigned i;
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@ -1534,11 +1534,16 @@ static void __nvme_scan_namespaces(struct nvme_ctrl *ctrl, unsigned nn)
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}
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}
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void nvme_scan_namespaces(struct nvme_ctrl *ctrl)
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static void nvme_scan_work(struct work_struct *work)
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{
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struct nvme_ctrl *ctrl =
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container_of(work, struct nvme_ctrl, scan_work);
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struct nvme_id_ctrl *id;
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unsigned nn;
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if (ctrl->state != NVME_CTRL_LIVE)
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return;
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if (nvme_identify_ctrl(ctrl, &id))
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return;
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@ -1549,13 +1554,26 @@ void nvme_scan_namespaces(struct nvme_ctrl *ctrl)
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if (!nvme_scan_ns_list(ctrl, nn))
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goto done;
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}
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__nvme_scan_namespaces(ctrl, le32_to_cpup(&id->nn));
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nvme_scan_ns_sequential(ctrl, nn);
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done:
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list_sort(NULL, &ctrl->namespaces, ns_cmp);
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mutex_unlock(&ctrl->namespaces_mutex);
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kfree(id);
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if (ctrl->ops->post_scan)
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ctrl->ops->post_scan(ctrl);
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}
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EXPORT_SYMBOL_GPL(nvme_scan_namespaces);
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void nvme_queue_scan(struct nvme_ctrl *ctrl)
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{
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/*
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* Do not queue new scan work when a controller is reset during
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* removal.
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*/
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if (ctrl->state == NVME_CTRL_LIVE)
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schedule_work(&ctrl->scan_work);
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}
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EXPORT_SYMBOL_GPL(nvme_queue_scan);
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void nvme_remove_namespaces(struct nvme_ctrl *ctrl)
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{
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@ -1597,6 +1615,9 @@ static void nvme_release_instance(struct nvme_ctrl *ctrl)
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void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
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{
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flush_work(&ctrl->scan_work);
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nvme_remove_namespaces(ctrl);
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device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance));
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spin_lock(&dev_list_lock);
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@ -1640,6 +1661,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
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ctrl->dev = dev;
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ctrl->ops = ops;
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ctrl->quirks = quirks;
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INIT_WORK(&ctrl->scan_work, nvme_scan_work);
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ret = nvme_set_instance(ctrl);
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if (ret)
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@ -108,6 +108,7 @@ struct nvme_ctrl {
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u32 vs;
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bool subsystem;
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unsigned long quirks;
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struct work_struct scan_work;
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};
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/*
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@ -147,6 +148,7 @@ struct nvme_ctrl_ops {
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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 (*post_scan)(struct nvme_ctrl *ctrl);
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};
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static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
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@ -207,7 +209,7 @@ void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
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void nvme_put_ctrl(struct nvme_ctrl *ctrl);
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int nvme_init_identify(struct nvme_ctrl *ctrl);
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void nvme_scan_namespaces(struct nvme_ctrl *ctrl);
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void nvme_queue_scan(struct nvme_ctrl *ctrl);
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void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
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void nvme_stop_queues(struct nvme_ctrl *ctrl);
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@ -92,7 +92,6 @@ struct nvme_dev {
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struct msix_entry *entry;
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void __iomem *bar;
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struct work_struct reset_work;
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struct work_struct scan_work;
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struct work_struct remove_work;
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struct work_struct async_work;
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struct timer_list watchdog_timer;
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@ -266,16 +265,6 @@ static int nvme_init_request(void *data, struct request *req,
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return 0;
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}
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static void nvme_queue_scan(struct nvme_dev *dev)
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{
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/*
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* Do not queue new scan work when a controller is reset during
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* removal.
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*/
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if (dev->ctrl.state == NVME_CTRL_LIVE)
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queue_work(nvme_workq, &dev->scan_work);
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}
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static void nvme_complete_async_event(struct nvme_dev *dev,
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struct nvme_completion *cqe)
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{
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@ -293,7 +282,7 @@ static void nvme_complete_async_event(struct nvme_dev *dev,
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switch (result & 0xff07) {
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case NVME_AER_NOTICE_NS_CHANGED:
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dev_info(dev->ctrl.device, "rescanning\n");
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nvme_queue_scan(dev);
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nvme_queue_scan(&dev->ctrl);
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default:
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dev_warn(dev->ctrl.device, "async event result %08x\n", result);
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}
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@ -1520,8 +1509,9 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
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return result;
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}
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static void nvme_set_irq_hints(struct nvme_dev *dev)
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static void nvme_pci_post_scan(struct nvme_ctrl *ctrl)
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{
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struct nvme_dev *dev = to_nvme_dev(ctrl);
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struct nvme_queue *nvmeq;
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int i;
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@ -1536,16 +1526,6 @@ static void nvme_set_irq_hints(struct nvme_dev *dev)
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}
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}
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static void nvme_dev_scan(struct work_struct *work)
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{
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struct nvme_dev *dev = container_of(work, struct nvme_dev, scan_work);
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if (!dev->tagset.tags)
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return;
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nvme_scan_namespaces(&dev->ctrl);
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nvme_set_irq_hints(dev);
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}
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static void nvme_del_queue_end(struct request *req, int error)
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{
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struct nvme_queue *nvmeq = req->end_io_data;
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@ -1894,7 +1874,7 @@ static void nvme_reset_work(struct work_struct *work)
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}
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if (dev->online_queues > 1)
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nvme_queue_scan(dev);
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nvme_queue_scan(&dev->ctrl);
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return;
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out:
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@ -1954,6 +1934,7 @@ static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
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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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.post_scan = nvme_pci_post_scan,
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};
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static int nvme_dev_map(struct nvme_dev *dev)
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@ -2005,7 +1986,6 @@ 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->scan_work, nvme_dev_scan);
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INIT_WORK(&dev->reset_work, nvme_reset_work);
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INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work);
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INIT_WORK(&dev->async_work, nvme_async_event_work);
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@ -2071,8 +2051,6 @@ static void nvme_remove(struct pci_dev *pdev)
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pci_set_drvdata(pdev, NULL);
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flush_work(&dev->async_work);
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flush_work(&dev->scan_work);
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nvme_remove_namespaces(&dev->ctrl);
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nvme_uninit_ctrl(&dev->ctrl);
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nvme_dev_disable(dev, true);
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flush_work(&dev->reset_work);
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