From 873946f4b957bf6e6a0351dd5282c73e0c870be9 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Tue, 11 Dec 2018 23:38:57 -0800 Subject: [PATCH] nvme-tcp: support separate queue maps for read and write Allow NVMF_OPT_NR_WRITE_QUEUES to describe additional write queues. In addition, implement .map_queues that will apply 2 queue maps for read and write queue sets. Note that with the separate queue map, HCTX_TYPE_READ will always use nr_io_queues and HCTX_TYPE_DEFAULT will use nr_write_queues. Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/tcp.c | 47 +++++++++++++++++++++++++++++++++++------ 1 file changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index 15543358e245..51826479a41e 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1215,7 +1215,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); struct nvme_tcp_queue *queue = &ctrl->queues[qid]; struct linger sol = { .l_onoff = 1, .l_linger = 0 }; - int ret, opt, rcv_pdu_size; + int ret, opt, rcv_pdu_size, n; queue->ctrl = ctrl; INIT_LIST_HEAD(&queue->send_list); @@ -1271,7 +1271,11 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, } queue->sock->sk->sk_allocation = GFP_ATOMIC; - queue->io_cpu = (qid == 0) ? 0 : qid - 1; + if (!qid) + n = 0; + else + n = (qid - 1) % num_online_cpus(); + queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false); queue->request = NULL; queue->data_remaining = 0; queue->ddgst_remaining = 0; @@ -1433,6 +1437,7 @@ static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl, set->driver_data = ctrl; set->nr_hw_queues = nctrl->queue_count - 1; set->timeout = NVME_IO_TIMEOUT; + set->nr_maps = 2 /* default + read */; } ret = blk_mq_alloc_tag_set(set); @@ -1527,7 +1532,12 @@ out_free_queues: static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl) { - return min(ctrl->queue_count - 1, num_online_cpus()); + unsigned int nr_io_queues; + + nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus()); + nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus()); + + return nr_io_queues; } static int nvme_alloc_io_queues(struct nvme_ctrl *ctrl) @@ -2052,6 +2062,29 @@ static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx, return BLK_STS_OK; } +static int nvme_tcp_map_queues(struct blk_mq_tag_set *set) +{ + struct nvme_tcp_ctrl *ctrl = set->driver_data; + + set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; + set->map[HCTX_TYPE_READ].nr_queues = ctrl->ctrl.opts->nr_io_queues; + if (ctrl->ctrl.opts->nr_write_queues) { + /* separate read/write queues */ + set->map[HCTX_TYPE_DEFAULT].nr_queues = + ctrl->ctrl.opts->nr_write_queues; + set->map[HCTX_TYPE_READ].queue_offset = + ctrl->ctrl.opts->nr_write_queues; + } else { + /* mixed read/write queues */ + set->map[HCTX_TYPE_DEFAULT].nr_queues = + ctrl->ctrl.opts->nr_io_queues; + set->map[HCTX_TYPE_READ].queue_offset = 0; + } + blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); + blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); + return 0; +} + static struct blk_mq_ops nvme_tcp_mq_ops = { .queue_rq = nvme_tcp_queue_rq, .complete = nvme_complete_rq, @@ -2059,6 +2092,7 @@ static struct blk_mq_ops nvme_tcp_mq_ops = { .exit_request = nvme_tcp_exit_request, .init_hctx = nvme_tcp_init_hctx, .timeout = nvme_tcp_timeout, + .map_queues = nvme_tcp_map_queues, }; static struct blk_mq_ops nvme_tcp_admin_mq_ops = { @@ -2113,7 +2147,7 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, INIT_LIST_HEAD(&ctrl->list); ctrl->ctrl.opts = opts; - ctrl->ctrl.queue_count = opts->nr_io_queues + 1; /* +1 for admin queue */ + ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 1; ctrl->ctrl.sqsize = opts->queue_size - 1; ctrl->ctrl.kato = opts->kato; @@ -2155,7 +2189,7 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, goto out_free_ctrl; } - ctrl->queues = kcalloc(opts->nr_io_queues + 1, sizeof(*ctrl->queues), + ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues), GFP_KERNEL); if (!ctrl->queues) { ret = -ENOMEM; @@ -2206,7 +2240,8 @@ static struct nvmf_transport_ops nvme_tcp_transport = { .required_opts = NVMF_OPT_TRADDR, .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | - NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST, + NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | + NVMF_OPT_NR_WRITE_QUEUES, .create_ctrl = nvme_tcp_create_ctrl, }; -- 2.30.2