diff options
Diffstat (limited to 'drivers/nvme/host/pci.c')
| -rw-r--r-- | drivers/nvme/host/pci.c | 62 |
1 files changed, 34 insertions, 28 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index c9f5983a9f82..727fec79b6cf 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -73,13 +73,13 @@ static const struct kernel_param_ops queue_count_ops = { .get = param_get_int, }; -static int write_queues; +static unsigned int write_queues; module_param_cb(write_queues, &queue_count_ops, &write_queues, 0644); MODULE_PARM_DESC(write_queues, "Number of queues to use for writes. If not set, reads and writes " "will share a queue set."); -static int poll_queues = 0; +static unsigned int poll_queues = 0; module_param_cb(poll_queues, &queue_count_ops, &poll_queues, 0644); MODULE_PARM_DESC(poll_queues, "Number of queues to use for polled IO."); @@ -183,7 +183,6 @@ struct nvme_queue { /* only used for poll queues: */ spinlock_t cq_poll_lock ____cacheline_aligned_in_smp; volatile struct nvme_completion *cqes; - struct blk_mq_tags **tags; dma_addr_t sq_dma_addr; dma_addr_t cq_dma_addr; u32 __iomem *q_db; @@ -392,29 +391,17 @@ static int nvme_admin_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, WARN_ON(hctx_idx != 0); WARN_ON(dev->admin_tagset.tags[0] != hctx->tags); - WARN_ON(nvmeq->tags); hctx->driver_data = nvmeq; - nvmeq->tags = &dev->admin_tagset.tags[0]; return 0; } -static void nvme_admin_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx) -{ - struct nvme_queue *nvmeq = hctx->driver_data; - - nvmeq->tags = NULL; -} - static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, unsigned int hctx_idx) { struct nvme_dev *dev = data; struct nvme_queue *nvmeq = &dev->queues[hctx_idx + 1]; - if (!nvmeq->tags) - nvmeq->tags = &dev->tagset.tags[hctx_idx]; - WARN_ON(dev->tagset.tags[hctx_idx] != hctx->tags); hctx->driver_data = nvmeq; return 0; @@ -963,6 +950,13 @@ static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq) writel(head, nvmeq->q_db + nvmeq->dev->db_stride); } +static inline struct blk_mq_tags *nvme_queue_tagset(struct nvme_queue *nvmeq) +{ + if (!nvmeq->qid) + return nvmeq->dev->admin_tagset.tags[0]; + return nvmeq->dev->tagset.tags[nvmeq->qid - 1]; +} + static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx) { volatile struct nvme_completion *cqe = &nvmeq->cqes[idx]; @@ -988,7 +982,7 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx) return; } - req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id); + req = blk_mq_tag_to_rq(nvme_queue_tagset(nvmeq), cqe->command_id); trace_nvme_sq(req, cqe->sq_head, nvmeq->sq_tail); nvme_end_request(req, cqe->status, cqe->result); } @@ -1103,9 +1097,9 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx) spin_lock(&nvmeq->cq_poll_lock); found = nvme_process_cq(nvmeq, &start, &end, -1); + nvme_complete_cqes(nvmeq, start, end); spin_unlock(&nvmeq->cq_poll_lock); - nvme_complete_cqes(nvmeq, start, end); return found; } @@ -1426,6 +1420,25 @@ static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) nvme_poll_irqdisable(nvmeq, -1); } +/* + * Called only on a device that has been disabled and after all other threads + * that can check this device's completion queues have synced, except + * nvme_poll(). This is the last chance for the driver to see a natural + * completion before nvme_cancel_request() terminates all incomplete requests. + */ +static void nvme_reap_pending_cqes(struct nvme_dev *dev) +{ + u16 start, end; + int i; + + for (i = dev->ctrl.queue_count - 1; i > 0; i--) { + spin_lock(&dev->queues[i].cq_poll_lock); + nvme_process_cq(&dev->queues[i], &start, &end, -1); + spin_unlock(&dev->queues[i].cq_poll_lock); + nvme_complete_cqes(&dev->queues[i], start, end); + } +} + static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, int entry_size) { @@ -1591,7 +1604,6 @@ static const struct blk_mq_ops nvme_mq_admin_ops = { .queue_rq = nvme_queue_rq, .complete = nvme_pci_complete_rq, .init_hctx = nvme_admin_init_hctx, - .exit_hctx = nvme_admin_exit_hctx, .init_request = nvme_init_request, .timeout = nvme_timeout, }; @@ -2073,7 +2085,6 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues) .priv = dev, }; unsigned int irq_queues, this_p_queues; - unsigned int nr_cpus = num_possible_cpus(); /* * Poll queues don't need interrupts, but we need at least one IO @@ -2084,10 +2095,7 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues) this_p_queues = nr_io_queues - 1; irq_queues = 1; } else { - if (nr_cpus < nr_io_queues - this_p_queues) - irq_queues = nr_cpus + 1; - else - irq_queues = nr_io_queues - this_p_queues + 1; + irq_queues = nr_io_queues - this_p_queues + 1; } dev->io_queues[HCTX_TYPE_POLL] = this_p_queues; @@ -2250,11 +2258,6 @@ static bool __nvme_disable_io_queues(struct nvme_dev *dev, u8 opcode) if (timeout == 0) return false; - /* handle any remaining CQEs */ - if (opcode == nvme_admin_delete_cq && - !test_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags)) - nvme_poll_irqdisable(nvmeq, -1); - sent--; if (nr_queues) goto retry; @@ -2417,6 +2420,7 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) nvme_suspend_io_queues(dev); nvme_suspend_queue(&dev->queues[0]); nvme_pci_disable(dev); + nvme_reap_pending_cqes(dev); blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); @@ -2966,6 +2970,8 @@ static const struct pci_device_id nvme_id_table[] = { { PCI_DEVICE(0x1cc1, 0x8201), /* ADATA SX8200PNP 512GB */ .driver_data = NVME_QUIRK_NO_DEEPEST_PS | NVME_QUIRK_IGNORE_DEV_SUBNQN, }, + { PCI_DEVICE(0x1c5c, 0x1504), /* SK Hynix PC400 */ + .driver_data = NVME_QUIRK_DISABLE_WRITE_ZEROES, }, { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) }, |