From e420f0c0f3d1022789fcb59b2a0c4b979ce311ba Mon Sep 17 00:00:00 2001 From: Haggai Eran Date: Thu, 11 Dec 2014 17:04:19 +0200 Subject: mlx5_core: Add support for page faults events and low level handling * Add a handler function pointer in the mlx5_core_qp struct for page fault events. Handle page fault events by calling the handler function, if not NULL. * Add on-demand paging capability query command. * Export command for resuming QPs after page faults. * Add various constants related to paging support. Signed-off-by: Sagi Grimberg Signed-off-by: Shachar Raindel Signed-off-by: Haggai Eran Signed-off-by: Roland Dreier --- drivers/net/ethernet/mellanox/mlx5/core/qp.c | 119 +++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlx5/core/qp.c') diff --git a/drivers/net/ethernet/mellanox/mlx5/core/qp.c b/drivers/net/ethernet/mellanox/mlx5/core/qp.c index 5261a2b0da43..575d853dbe05 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/qp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/qp.c @@ -88,6 +88,95 @@ void mlx5_rsc_event(struct mlx5_core_dev *dev, u32 rsn, int event_type) mlx5_core_put_rsc(common); } +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING +void mlx5_eq_pagefault(struct mlx5_core_dev *dev, struct mlx5_eqe *eqe) +{ + struct mlx5_eqe_page_fault *pf_eqe = &eqe->data.page_fault; + int qpn = be32_to_cpu(pf_eqe->flags_qpn) & MLX5_QPN_MASK; + struct mlx5_core_rsc_common *common = mlx5_get_rsc(dev, qpn); + struct mlx5_core_qp *qp = + container_of(common, struct mlx5_core_qp, common); + struct mlx5_pagefault pfault; + + if (!qp) { + mlx5_core_warn(dev, "ODP event for non-existent QP %06x\n", + qpn); + return; + } + + pfault.event_subtype = eqe->sub_type; + pfault.flags = (be32_to_cpu(pf_eqe->flags_qpn) >> MLX5_QPN_BITS) & + (MLX5_PFAULT_REQUESTOR | MLX5_PFAULT_WRITE | MLX5_PFAULT_RDMA); + pfault.bytes_committed = be32_to_cpu( + pf_eqe->bytes_committed); + + mlx5_core_dbg(dev, + "PAGE_FAULT: subtype: 0x%02x, flags: 0x%02x,\n", + eqe->sub_type, pfault.flags); + + switch (eqe->sub_type) { + case MLX5_PFAULT_SUBTYPE_RDMA: + /* RDMA based event */ + pfault.rdma.r_key = + be32_to_cpu(pf_eqe->rdma.r_key); + pfault.rdma.packet_size = + be16_to_cpu(pf_eqe->rdma.packet_length); + pfault.rdma.rdma_op_len = + be32_to_cpu(pf_eqe->rdma.rdma_op_len); + pfault.rdma.rdma_va = + be64_to_cpu(pf_eqe->rdma.rdma_va); + mlx5_core_dbg(dev, + "PAGE_FAULT: qpn: 0x%06x, r_key: 0x%08x,\n", + qpn, pfault.rdma.r_key); + mlx5_core_dbg(dev, + "PAGE_FAULT: rdma_op_len: 0x%08x,\n", + pfault.rdma.rdma_op_len); + mlx5_core_dbg(dev, + "PAGE_FAULT: rdma_va: 0x%016llx,\n", + pfault.rdma.rdma_va); + mlx5_core_dbg(dev, + "PAGE_FAULT: bytes_committed: 0x%06x\n", + pfault.bytes_committed); + break; + + case MLX5_PFAULT_SUBTYPE_WQE: + /* WQE based event */ + pfault.wqe.wqe_index = + be16_to_cpu(pf_eqe->wqe.wqe_index); + pfault.wqe.packet_size = + be16_to_cpu(pf_eqe->wqe.packet_length); + mlx5_core_dbg(dev, + "PAGE_FAULT: qpn: 0x%06x, wqe_index: 0x%04x,\n", + qpn, pfault.wqe.wqe_index); + mlx5_core_dbg(dev, + "PAGE_FAULT: bytes_committed: 0x%06x\n", + pfault.bytes_committed); + break; + + default: + mlx5_core_warn(dev, + "Unsupported page fault event sub-type: 0x%02hhx, QP %06x\n", + eqe->sub_type, qpn); + /* Unsupported page faults should still be resolved by the + * page fault handler + */ + } + + if (qp->pfault_handler) { + qp->pfault_handler(qp, &pfault); + } else { + mlx5_core_err(dev, + "ODP event for QP %08x, without a fault handler in QP\n", + qpn); + /* Page fault will remain unresolved. QP will hang until it is + * destroyed + */ + } + + mlx5_core_put_rsc(common); +} +#endif + int mlx5_core_create_qp(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, struct mlx5_create_qp_mbox_in *in, @@ -322,3 +411,33 @@ int mlx5_core_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn) return err; } EXPORT_SYMBOL_GPL(mlx5_core_xrcd_dealloc); + +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING +int mlx5_core_page_fault_resume(struct mlx5_core_dev *dev, u32 qpn, + u8 flags, int error) +{ + struct mlx5_page_fault_resume_mbox_in in; + struct mlx5_page_fault_resume_mbox_out out; + int err; + + memset(&in, 0, sizeof(in)); + memset(&out, 0, sizeof(out)); + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_PAGE_FAULT_RESUME); + in.hdr.opmod = 0; + flags &= (MLX5_PAGE_FAULT_RESUME_REQUESTOR | + MLX5_PAGE_FAULT_RESUME_WRITE | + MLX5_PAGE_FAULT_RESUME_RDMA); + flags |= (error ? MLX5_PAGE_FAULT_RESUME_ERROR : 0); + in.flags_qpn = cpu_to_be32((qpn & MLX5_QPN_MASK) | + (flags << MLX5_QPN_BITS)); + err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); + if (err) + return err; + + if (out.hdr.status) + err = mlx5_cmd_status_to_err(&out.hdr); + + return err; +} +EXPORT_SYMBOL_GPL(mlx5_core_page_fault_resume); +#endif -- cgit v1.2.3