From bb487d29ce005416ed355dea213bbc39c03dabe7 Mon Sep 17 00:00:00 2001 From: Qian Cai Date: Fri, 23 Aug 2019 15:56:23 -0400 Subject: [PATCH 1/4] net/mlx5: fix a -Wstringop-truncation warning In file included from ./arch/powerpc/include/asm/paca.h:15, from ./arch/powerpc/include/asm/current.h:13, from ./include/linux/thread_info.h:21, from ./include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from ./include/linux/preempt.h:78, from ./include/linux/spinlock.h:51, from ./include/linux/wait.h:9, from ./include/linux/completion.h:12, from ./include/linux/mlx5/driver.h:37, from drivers/net/ethernet/mellanox/mlx5/core/lib/eq.h:6, from drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c:33: In function 'strncpy', inlined from 'mlx5_fw_tracer_save_trace' at drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c:549:2, inlined from 'mlx5_tracer_print_trace' at drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c:574:2: ./include/linux/string.h:305:9: warning: '__builtin_strncpy' output may be truncated copying 256 bytes from a string of length 511 [-Wstringop-truncation] return __builtin_strncpy(p, q, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fix it by using the new strscpy_pad() since the commit 458a3bf82df4 ("lib/string: Add strscpy_pad() function") which will always NUL-terminate the string, and avoid possibly leak data through the ring buffer where non-admin account might enable these events through perf. Fixes: fd1483fe1f9f ("net/mlx5: Add support for FW reporter dump") Signed-off-by: Qian Cai Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c index 8a4930c8bf62..2011eaf15cc5 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c @@ -546,7 +546,7 @@ static void mlx5_fw_tracer_save_trace(struct mlx5_fw_tracer *tracer, trace_data->timestamp = timestamp; trace_data->lost = lost; trace_data->event_id = event_id; - strncpy(trace_data->msg, msg, TRACE_STR_MSG); + strscpy_pad(trace_data->msg, msg, TRACE_STR_MSG); tracer->st_arr.saved_traces_index = (tracer->st_arr.saved_traces_index + 1) & (SAVED_TRACES_NUM - 1); From 00679b631eddaa0aa0ceba719fcb1f60c65da5a3 Mon Sep 17 00:00:00 2001 From: Michael Guralnik Date: Mon, 19 Aug 2019 15:08:13 +0300 Subject: [PATCH 2/4] net/mlx5: Set ODP capabilities for DC transport to max In mlx5_core initialization, query max ODP capabilities for DC transport from FW and set as current capabilities. Signed-off-by: Michael Guralnik Signed-off-by: Leon Romanovsky --- drivers/net/ethernet/mellanox/mlx5/core/main.c | 6 ++++++ include/linux/mlx5/mlx5_ifc.h | 4 +++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c index fa0e991f1983..7f70ecb1db6d 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -495,6 +495,12 @@ static int handle_hca_cap_odp(struct mlx5_core_dev *dev) ODP_CAP_SET_MAX(dev, xrc_odp_caps.write); ODP_CAP_SET_MAX(dev, xrc_odp_caps.read); ODP_CAP_SET_MAX(dev, xrc_odp_caps.atomic); + ODP_CAP_SET_MAX(dev, dc_odp_caps.srq_receive); + ODP_CAP_SET_MAX(dev, dc_odp_caps.send); + ODP_CAP_SET_MAX(dev, dc_odp_caps.receive); + ODP_CAP_SET_MAX(dev, dc_odp_caps.write); + ODP_CAP_SET_MAX(dev, dc_odp_caps.read); + ODP_CAP_SET_MAX(dev, dc_odp_caps.atomic); if (do_set) err = set_caps(dev, set_ctx, set_sz, diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h index 1e55cf73e88c..4e278114d8b3 100644 --- a/include/linux/mlx5/mlx5_ifc.h +++ b/include/linux/mlx5/mlx5_ifc.h @@ -948,7 +948,9 @@ struct mlx5_ifc_odp_cap_bits { struct mlx5_ifc_odp_per_transport_service_cap_bits xrc_odp_caps; - u8 reserved_at_100[0x700]; + struct mlx5_ifc_odp_per_transport_service_cap_bits dc_odp_caps; + + u8 reserved_at_120[0x6E0]; }; struct mlx5_ifc_calc_op { From 29af94987ba68a0244b73e8a0b051addb8853f93 Mon Sep 17 00:00:00 2001 From: Michael Guralnik Date: Mon, 19 Aug 2019 15:08:14 +0300 Subject: [PATCH 3/4] IB/mlx5: Remove check of FW capabilities in ODP page fault handling As page fault handling is initiated by FW, there is no need to check that the ODP supports the operation and transport. Link: https://lore.kernel.org/r/20190819120815.21225-3-leon@kernel.org Signed-off-by: Michael Guralnik Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/odp.c | 48 +------------------------------- 1 file changed, 1 insertion(+), 47 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 5b642d81e617..8c8e5f41a82f 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -990,17 +990,6 @@ static int pagefault_data_segments(struct mlx5_ib_dev *dev, return ret < 0 ? ret : npages; } -static const u32 mlx5_ib_odp_opcode_cap[] = { - [MLX5_OPCODE_SEND] = IB_ODP_SUPPORT_SEND, - [MLX5_OPCODE_SEND_IMM] = IB_ODP_SUPPORT_SEND, - [MLX5_OPCODE_SEND_INVAL] = IB_ODP_SUPPORT_SEND, - [MLX5_OPCODE_RDMA_WRITE] = IB_ODP_SUPPORT_WRITE, - [MLX5_OPCODE_RDMA_WRITE_IMM] = IB_ODP_SUPPORT_WRITE, - [MLX5_OPCODE_RDMA_READ] = IB_ODP_SUPPORT_READ, - [MLX5_OPCODE_ATOMIC_CS] = IB_ODP_SUPPORT_ATOMIC, - [MLX5_OPCODE_ATOMIC_FA] = IB_ODP_SUPPORT_ATOMIC, -}; - /* * Parse initiator WQE. Advances the wqe pointer to point at the * scatter-gather list, and set wqe_end to the end of the WQE. @@ -1011,7 +1000,6 @@ static int mlx5_ib_mr_initiator_pfault_handler( { struct mlx5_wqe_ctrl_seg *ctrl = *wqe; u16 wqe_index = pfault->wqe.wqe_index; - u32 transport_caps; struct mlx5_base_av *av; unsigned ds, opcode; #if defined(DEBUG) @@ -1059,29 +1047,8 @@ static int mlx5_ib_mr_initiator_pfault_handler( opcode = be32_to_cpu(ctrl->opmod_idx_opcode) & MLX5_WQE_CTRL_OPCODE_MASK; - switch (qp->ibqp.qp_type) { - case IB_QPT_XRC_INI: + if (qp->ibqp.qp_type == IB_QPT_XRC_INI) *wqe += sizeof(struct mlx5_wqe_xrc_seg); - transport_caps = dev->odp_caps.per_transport_caps.xrc_odp_caps; - break; - case IB_QPT_RC: - transport_caps = dev->odp_caps.per_transport_caps.rc_odp_caps; - break; - case IB_QPT_UD: - transport_caps = dev->odp_caps.per_transport_caps.ud_odp_caps; - break; - default: - mlx5_ib_err(dev, "ODP fault on QP of an unsupported transport 0x%x\n", - qp->ibqp.qp_type); - return -EFAULT; - } - - if (unlikely(opcode >= ARRAY_SIZE(mlx5_ib_odp_opcode_cap) || - !(transport_caps & mlx5_ib_odp_opcode_cap[opcode]))) { - mlx5_ib_err(dev, "ODP fault on QP of an unsupported opcode 0x%x\n", - opcode); - return -EFAULT; - } if (qp->ibqp.qp_type == IB_QPT_UD) { av = *wqe; @@ -1146,19 +1113,6 @@ static int mlx5_ib_mr_responder_pfault_handler_rq(struct mlx5_ib_dev *dev, return -EFAULT; } - switch (qp->ibqp.qp_type) { - case IB_QPT_RC: - if (!(dev->odp_caps.per_transport_caps.rc_odp_caps & - IB_ODP_SUPPORT_RECV)) - goto invalid_transport_or_opcode; - break; - default: -invalid_transport_or_opcode: - mlx5_ib_err(dev, "ODP fault on QP of an unsupported transport. transport: 0x%x\n", - qp->ibqp.qp_type); - return -EFAULT; - } - *wqe_end = wqe + wqe_size; return 0; From 75e46fc02c975f401e70a53ecd55d475081d13a3 Mon Sep 17 00:00:00 2001 From: Michael Guralnik Date: Mon, 19 Aug 2019 15:08:15 +0300 Subject: [PATCH 4/4] IB/mlx5: Add page fault handler for DC initiator WQE Parsing DC initiator WQEs upon page fault requires skipping an address vector segment, as in UD WQEs. Link: https://lore.kernel.org/r/20190819120815.21225-4-leon@kernel.org Signed-off-by: Michael Guralnik Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/odp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 8c8e5f41a82f..429c72407d7f 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -1050,7 +1050,8 @@ static int mlx5_ib_mr_initiator_pfault_handler( if (qp->ibqp.qp_type == IB_QPT_XRC_INI) *wqe += sizeof(struct mlx5_wqe_xrc_seg); - if (qp->ibqp.qp_type == IB_QPT_UD) { + if (qp->ibqp.qp_type == IB_QPT_UD || + qp->qp_sub_type == MLX5_IB_QPT_DCI) { av = *wqe; if (av->dqp_dct & cpu_to_be32(MLX5_EXTENDED_UD_AV)) *wqe += sizeof(struct mlx5_av);