From c9f189271cff85d5d735e25dfa4bc95952ec12d8 Mon Sep 17 00:00:00 2001 From: Hyunchul Lee Date: Fri, 7 Jan 2022 14:45:30 +0900 Subject: ksmbd: smbd: create MR pool Create a memory region pool because rdma_rw_ctx_init() uses memory registration if memory registration yields better performance than using multiple SGE entries. Acked-by: Namjae Jeon Signed-off-by: Hyunchul Lee Signed-off-by: Steve French --- fs/ksmbd/transport_rdma.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'fs/ksmbd') diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c index 0fd706d01790..f0b17da1cac2 100644 --- a/fs/ksmbd/transport_rdma.c +++ b/fs/ksmbd/transport_rdma.c @@ -428,6 +428,7 @@ static void free_transport(struct smb_direct_transport *t) if (t->qp) { ib_drain_qp(t->qp); + ib_mr_pool_destroy(t->qp, &t->qp->rdma_mrs); ib_destroy_qp(t->qp); } @@ -1708,7 +1709,9 @@ static int smb_direct_init_params(struct smb_direct_transport *t, cap->max_send_sge = SMB_DIRECT_MAX_SEND_SGES; cap->max_recv_sge = SMB_DIRECT_MAX_RECV_SGES; cap->max_inline_data = 0; - cap->max_rdma_ctxs = 0; + cap->max_rdma_ctxs = + rdma_rw_mr_factor(device, t->cm_id->port_num, max_pages) * + smb_direct_max_outstanding_rw_ops; return 0; } @@ -1790,6 +1793,7 @@ static int smb_direct_create_qpair(struct smb_direct_transport *t, { int ret; struct ib_qp_init_attr qp_attr; + int pages_per_rw; t->pd = ib_alloc_pd(t->cm_id->device, 0); if (IS_ERR(t->pd)) { @@ -1837,6 +1841,23 @@ static int smb_direct_create_qpair(struct smb_direct_transport *t, t->qp = t->cm_id->qp; t->cm_id->event_handler = smb_direct_cm_handler; + pages_per_rw = DIV_ROUND_UP(t->max_rdma_rw_size, PAGE_SIZE) + 1; + if (pages_per_rw > t->cm_id->device->attrs.max_sgl_rd) { + int pages_per_mr, mr_count; + + pages_per_mr = min_t(int, pages_per_rw, + t->cm_id->device->attrs.max_fast_reg_page_list_len); + mr_count = DIV_ROUND_UP(pages_per_rw, pages_per_mr) * + atomic_read(&t->rw_avail_ops); + ret = ib_mr_pool_init(t->qp, &t->qp->rdma_mrs, mr_count, + IB_MR_TYPE_MEM_REG, pages_per_mr, 0); + if (ret) { + pr_err("failed to init mr pool count %d pages %d\n", + mr_count, pages_per_mr); + goto err; + } + } + return 0; err: if (t->qp) { -- cgit v1.2.3