From 23528aa3320a74b028e990b5a939fed32a8afc2f Mon Sep 17 00:00:00 2001 From: Shivaji Kant Date: Mon, 6 Apr 2026 09:21:32 +0000 Subject: [PATCH] nvme: enable PCI P2PDMA support for RDMA transport Enable BLK_FEAT_PCI_P2PDMA on the NVMe when the underlying RDMA controller supports it. Suggested-by: Pranjal Shrivastava Reviewed-by: Pranjal Shrivastava Reviewed-by: Henrique Carvalho Reviewed-by: Christoph Hellwig Signed-off-by: Shivaji Kant Signed-off-by: Keith Busch --- drivers/nvme/host/rdma.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 1ec6e867aedb6..f77c960f7632d 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -2189,6 +2189,13 @@ out_fail: nvme_rdma_reconnect_or_remove(ctrl, ret); } +static bool nvme_rdma_supports_pci_p2pdma(struct nvme_ctrl *ctrl) +{ + struct nvme_rdma_ctrl *r_ctrl = to_rdma_ctrl(ctrl); + + return ib_dma_pci_p2p_dma_supported(r_ctrl->device->dev); +} + static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = { .name = "rdma", .module = THIS_MODULE, @@ -2203,6 +2210,7 @@ static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = { .get_address = nvmf_get_address, .stop_ctrl = nvme_rdma_stop_ctrl, .get_virt_boundary = nvme_get_virt_boundary, + .supports_pci_p2pdma = nvme_rdma_supports_pci_p2pdma, }; /* -- 2.47.3