[PATCH rfc 05/10] nvme-pci: Support blk_poll_batch
From: Sagi Grimberg <sagi@grimberg.me>
Date: 2017-03-09 13:16:37
Also in:
linux-nvme, linux-rdma
Subsystem:
nvm express driver, the rest · Maintainers:
Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg, Linus Torvalds
Signed-off-by: Sagi Grimberg <sagi@grimberg.me> --- drivers/nvme/host/pci.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index a7ad514c2451..f8dcd0bd19f8 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c@@ -789,6 +789,21 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) return found; } +static int nvme_poll_batch(struct blk_mq_hw_ctx *hctx, unsigned int batch) +{ + struct nvme_queue *nvmeq = hctx->driver_data; + int completed; + + if (!nvme_cqe_valid(nvmeq, nvmeq->cq_head, nvmeq->cq_phase)) + return 0; + + spin_lock_irq(&nvmeq->q_lock); + completed = __nvme_process_cq(nvmeq, batch); + spin_unlock_irq(&nvmeq->q_lock); + + return completed; +} + static void nvme_pci_submit_async_event(struct nvme_ctrl *ctrl, int aer_idx) { struct nvme_dev *dev = to_nvme_dev(ctrl);
@@ -1174,6 +1189,7 @@ static struct blk_mq_ops nvme_mq_ops = { .map_queues = nvme_pci_map_queues, .timeout = nvme_timeout, .poll = nvme_poll, + .poll_batch = nvme_poll_batch, }; static void nvme_dev_remove_admin(struct nvme_dev *dev)
--
2.7.4
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