From: Christoph Hellwig Date: Tue, 26 Apr 2016 11:52:00 +0000 (+0200) Subject: nvme: move AER handling to common code X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f866fc4282a81673ef973ad54c68235a3263b42e;p=linux-beck.git nvme: move AER handling to common code The transport driver still needs to do the actual submission, but all the higher level code can be shared. Signed-off-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Signed-off-by: Jens Axboe --- diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 899bb4181495..3cf366ab66e9 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1584,6 +1584,54 @@ void nvme_remove_namespaces(struct nvme_ctrl *ctrl) } EXPORT_SYMBOL_GPL(nvme_remove_namespaces); +static void nvme_async_event_work(struct work_struct *work) +{ + struct nvme_ctrl *ctrl = + container_of(work, struct nvme_ctrl, async_event_work); + + spin_lock_irq(&ctrl->lock); + while (ctrl->event_limit > 0) { + int aer_idx = --ctrl->event_limit; + + spin_unlock_irq(&ctrl->lock); + ctrl->ops->submit_async_event(ctrl, aer_idx); + spin_lock_irq(&ctrl->lock); + } + spin_unlock_irq(&ctrl->lock); +} + +void nvme_complete_async_event(struct nvme_ctrl *ctrl, + struct nvme_completion *cqe) +{ + u16 status = le16_to_cpu(cqe->status) >> 1; + u32 result = le32_to_cpu(cqe->result); + + if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) { + ++ctrl->event_limit; + schedule_work(&ctrl->async_event_work); + } + + if (status != NVME_SC_SUCCESS) + return; + + switch (result & 0xff07) { + case NVME_AER_NOTICE_NS_CHANGED: + dev_info(ctrl->device, "rescanning\n"); + nvme_queue_scan(ctrl); + break; + default: + dev_warn(ctrl->device, "async event result %08x\n", result); + } +} +EXPORT_SYMBOL_GPL(nvme_complete_async_event); + +void nvme_queue_async_events(struct nvme_ctrl *ctrl) +{ + ctrl->event_limit = NVME_NR_AERS; + schedule_work(&ctrl->async_event_work); +} +EXPORT_SYMBOL_GPL(nvme_queue_async_events); + static DEFINE_IDA(nvme_instance_ida); static int nvme_set_instance(struct nvme_ctrl *ctrl) @@ -1615,6 +1663,7 @@ static void nvme_release_instance(struct nvme_ctrl *ctrl) void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) { + flush_work(&ctrl->async_event_work); flush_work(&ctrl->scan_work); nvme_remove_namespaces(ctrl); @@ -1662,6 +1711,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, ctrl->ops = ops; ctrl->quirks = quirks; INIT_WORK(&ctrl->scan_work, nvme_scan_work); + INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); ret = nvme_set_instance(ctrl); if (ret) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 9b63e719318a..631a11e15b7c 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -109,6 +109,7 @@ struct nvme_ctrl { bool subsystem; unsigned long quirks; struct work_struct scan_work; + struct work_struct async_event_work; }; /* @@ -149,6 +150,7 @@ struct nvme_ctrl_ops { int (*reset_ctrl)(struct nvme_ctrl *ctrl); void (*free_ctrl)(struct nvme_ctrl *ctrl); void (*post_scan)(struct nvme_ctrl *ctrl); + void (*submit_async_event)(struct nvme_ctrl *ctrl, int aer_idx); }; static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl) @@ -212,6 +214,11 @@ int nvme_init_identify(struct nvme_ctrl *ctrl); void nvme_queue_scan(struct nvme_ctrl *ctrl); void nvme_remove_namespaces(struct nvme_ctrl *ctrl); +#define NVME_NR_AERS 1 +void nvme_complete_async_event(struct nvme_ctrl *ctrl, + struct nvme_completion *cqe); +void nvme_queue_async_events(struct nvme_ctrl *ctrl); + void nvme_stop_queues(struct nvme_ctrl *ctrl); void nvme_start_queues(struct nvme_ctrl *ctrl); void nvme_kill_queues(struct nvme_ctrl *ctrl); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 15bc33755324..82a0fc200f44 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -54,8 +54,7 @@ * We handle AEN commands ourselves and don't even let the * block layer know about them. */ -#define NVME_NR_AEN_COMMANDS 1 -#define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AEN_COMMANDS) +#define NVME_AQ_BLKMQ_DEPTH (NVME_AQ_DEPTH - NVME_NR_AERS) static int use_threaded_interrupts; module_param(use_threaded_interrupts, int, 0); @@ -93,7 +92,6 @@ struct nvme_dev { void __iomem *bar; struct work_struct reset_work; struct work_struct remove_work; - struct work_struct async_work; struct timer_list watchdog_timer; struct mutex shutdown_lock; bool subsystem; @@ -265,29 +263,6 @@ static int nvme_init_request(void *data, struct request *req, return 0; } -static void nvme_complete_async_event(struct nvme_dev *dev, - struct nvme_completion *cqe) -{ - u16 status = le16_to_cpu(cqe->status) >> 1; - u32 result = le32_to_cpu(cqe->result); - - if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) { - ++dev->ctrl.event_limit; - queue_work(nvme_workq, &dev->async_work); - } - - if (status != NVME_SC_SUCCESS) - return; - - switch (result & 0xff07) { - case NVME_AER_NOTICE_NS_CHANGED: - dev_info(dev->ctrl.device, "rescanning\n"); - nvme_queue_scan(&dev->ctrl); - default: - dev_warn(dev->ctrl.device, "async event result %08x\n", result); - } -} - /** * __nvme_submit_cmd() - Copy a command into a queue and ring the doorbell * @nvmeq: The queue to use @@ -709,7 +684,7 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) */ if (unlikely(nvmeq->qid == 0 && cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { - nvme_complete_async_event(nvmeq->dev, &cqe); + nvme_complete_async_event(&nvmeq->dev->ctrl, &cqe); continue; } @@ -778,21 +753,18 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) return 0; } -static void nvme_async_event_work(struct work_struct *work) +static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx) { - struct nvme_dev *dev = container_of(work, struct nvme_dev, async_work); + struct nvme_dev *dev = to_nvme_dev(ctrl); struct nvme_queue *nvmeq = dev->queues[0]; struct nvme_command c; memset(&c, 0, sizeof(c)); c.common.opcode = nvme_admin_async_event; + c.common.command_id = NVME_AQ_BLKMQ_DEPTH + aer_idx; spin_lock_irq(&nvmeq->q_lock); - while (dev->ctrl.event_limit > 0) { - c.common.command_id = NVME_AQ_BLKMQ_DEPTH + - --dev->ctrl.event_limit; - __nvme_submit_cmd(nvmeq, &c); - } + __nvme_submit_cmd(nvmeq, &c); spin_unlock_irq(&nvmeq->q_lock); } @@ -1848,10 +1820,8 @@ static void nvme_reset_work(struct work_struct *work) * should not submit commands the user did not request, so skip * registering for asynchronous event notification on this condition. */ - if (dev->online_queues > 1) { - dev->ctrl.event_limit = NVME_NR_AEN_COMMANDS; - queue_work(nvme_workq, &dev->async_work); - } + if (dev->online_queues > 1) + nvme_queue_async_events(&dev->ctrl); mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + HZ)); @@ -1935,6 +1905,7 @@ static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { .reset_ctrl = nvme_pci_reset_ctrl, .free_ctrl = nvme_pci_free_ctrl, .post_scan = nvme_pci_post_scan, + .submit_async_event = nvme_pci_submit_async_event, }; static int nvme_dev_map(struct nvme_dev *dev) @@ -1988,7 +1959,6 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) INIT_WORK(&dev->reset_work, nvme_reset_work); INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); - INIT_WORK(&dev->async_work, nvme_async_event_work); setup_timer(&dev->watchdog_timer, nvme_watchdog_timer, (unsigned long)dev); mutex_init(&dev->shutdown_lock); @@ -2050,7 +2020,6 @@ static void nvme_remove(struct pci_dev *pdev) nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); pci_set_drvdata(pdev, NULL); - flush_work(&dev->async_work); nvme_uninit_ctrl(&dev->ctrl); nvme_dev_disable(dev, true); flush_work(&dev->reset_work);