diff options
| -rw-r--r-- | drivers/nvme/host/pci.c | 57 |
1 files changed, 33 insertions, 24 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index b945e9a89883..b0978ac554d5 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -128,6 +128,9 @@ struct nvme_dev { dma_addr_t host_mem_descs_dma; struct nvme_host_mem_buf_desc *host_mem_descs; void **host_mem_desc_bufs; + unsigned int nr_allocated_queues; + unsigned int nr_write_queues; + unsigned int nr_poll_queues; }; static int io_queue_depth_set(const char *val, const struct kernel_param *kp) @@ -208,25 +211,14 @@ struct nvme_iod { struct scatterlist *sg; }; -static unsigned int max_io_queues(void) +static inline unsigned int nvme_dbbuf_size(struct nvme_dev *dev) { - return num_possible_cpus() + write_queues + poll_queues; -} - -static unsigned int max_queue_count(void) -{ - /* IO queues + admin queue */ - return 1 + max_io_queues(); -} - -static inline unsigned int nvme_dbbuf_size(u32 stride) -{ - return (max_queue_count() * 8 * stride); + return dev->nr_allocated_queues * 8 * dev->db_stride; } static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev) { - unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); + unsigned int mem_size = nvme_dbbuf_size(dev); if (dev->dbbuf_dbs) return 0; @@ -251,7 +243,7 @@ static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev) static void nvme_dbbuf_dma_free(struct nvme_dev *dev) { - unsigned int mem_size = nvme_dbbuf_size(dev->db_stride); + unsigned int mem_size = nvme_dbbuf_size(dev); if (dev->dbbuf_dbs) { dma_free_coherent(dev->dev, mem_size, @@ -1981,7 +1973,7 @@ static int nvme_setup_host_mem(struct nvme_dev *dev) static void nvme_calc_irq_sets(struct irq_affinity *affd, unsigned int nrirqs) { struct nvme_dev *dev = affd->priv; - unsigned int nr_read_queues; + unsigned int nr_read_queues, nr_write_queues = dev->nr_write_queues; /* * If there is no interupt available for queues, ensure that @@ -1997,12 +1989,12 @@ static void nvme_calc_irq_sets(struct irq_affinity *affd, unsigned int nrirqs) if (!nrirqs) { nrirqs = 1; nr_read_queues = 0; - } else if (nrirqs == 1 || !write_queues) { + } else if (nrirqs == 1 || !nr_write_queues) { nr_read_queues = 0; - } else if (write_queues >= nrirqs) { + } else if (nr_write_queues >= nrirqs) { nr_read_queues = 1; } else { - nr_read_queues = nrirqs - write_queues; + nr_read_queues = nrirqs - nr_write_queues; } dev->io_queues[HCTX_TYPE_DEFAULT] = nrirqs - nr_read_queues; @@ -2026,7 +2018,7 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues) * Poll queues don't need interrupts, but we need at least one IO * queue left over for non-polled IO. */ - this_p_queues = poll_queues; + this_p_queues = dev->nr_poll_queues; if (this_p_queues >= nr_io_queues) { this_p_queues = nr_io_queues - 1; irq_queues = 1; @@ -2056,14 +2048,25 @@ static void nvme_disable_io_queues(struct nvme_dev *dev) __nvme_disable_io_queues(dev, nvme_admin_delete_cq); } +static unsigned int nvme_max_io_queues(struct nvme_dev *dev) +{ + return num_possible_cpus() + dev->nr_write_queues + dev->nr_poll_queues; +} + static int nvme_setup_io_queues(struct nvme_dev *dev) { struct nvme_queue *adminq = &dev->queues[0]; struct pci_dev *pdev = to_pci_dev(dev->dev); - int result, nr_io_queues; + unsigned int nr_io_queues; unsigned long size; + int result; - nr_io_queues = max_io_queues(); + /* + * Sample the module parameters once at reset time so that we have + * stable values to work with. + */ + dev->nr_write_queues = write_queues; + dev->nr_poll_queues = poll_queues; /* * If tags are shared with admin queue (Apple bug), then @@ -2071,6 +2074,9 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) */ if (dev->ctrl.quirks & NVME_QUIRK_SHARED_TAGS) nr_io_queues = 1; + else + nr_io_queues = min(nvme_max_io_queues(dev), + dev->nr_allocated_queues - 1); result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); if (result < 0) @@ -2745,8 +2751,11 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (!dev) return -ENOMEM; - dev->queues = kcalloc_node(max_queue_count(), sizeof(struct nvme_queue), - GFP_KERNEL, node); + dev->nr_write_queues = write_queues; + dev->nr_poll_queues = poll_queues; + dev->nr_allocated_queues = nvme_max_io_queues(dev) + 1; + dev->queues = kcalloc_node(dev->nr_allocated_queues, + sizeof(struct nvme_queue), GFP_KERNEL, node); if (!dev->queues) goto free; |