On Jul 20, 2015, at 12:54 PM, Sagi Grimberg <[email protected]> wrote:
> The mlx5 driver exposes device capability IB_DEVICE_LOCAL_DMA_LKEY > but does not set the the device local_dma_lkey. This breaks > rpcrdma drivers. > > Query and set this lkey when creating the device resources. Wow. This suggests no-one has been testing NFS/RDMA with mlx5? I know I’m not (yet). Anyway, this makes sense. > Signed-off-by: Sagi Grimberg <[email protected]> > --- > drivers/infiniband/hw/mlx5/main.c | 9 ++++++++- > drivers/net/ethernet/mellanox/mlx5/core/fw.c | 22 ++++++++++++++++++++++ > include/linux/mlx5/device.h | 11 +++++++++++ > include/linux/mlx5/driver.h | 1 + > 4 files changed, 42 insertions(+), 1 deletion(-) > > diff --git a/drivers/infiniband/hw/mlx5/main.c > b/drivers/infiniband/hw/mlx5/main.c > index 11bd9ec..b272c8a 100644 > --- a/drivers/infiniband/hw/mlx5/main.c > +++ b/drivers/infiniband/hw/mlx5/main.c > @@ -1257,10 +1257,18 @@ static int create_dev_resources(struct > mlx5_ib_resources *devr) > struct ib_srq_init_attr attr; > struct mlx5_ib_dev *dev; > struct ib_cq_init_attr cq_attr = {.cqe = 1}; > + u32 rsvd_lkey; > int ret = 0; > > dev = container_of(devr, struct mlx5_ib_dev, devr); > > + ret = mlx5_core_query_special_context(dev->mdev, &rsvd_lkey); > + if (ret) { > + pr_err("Failed to query special context %d\n", ret); > + return ret; > + } > + dev->ib_dev.local_dma_lkey = rsvd_lkey; > + > devr->p0 = mlx5_ib_alloc_pd(&dev->ib_dev, NULL, NULL); > if (IS_ERR(devr->p0)) { > ret = PTR_ERR(devr->p0); > @@ -1422,7 +1430,6 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev) > strlcpy(dev->ib_dev.name, "mlx5_%d", IB_DEVICE_NAME_MAX); > dev->ib_dev.owner = THIS_MODULE; > dev->ib_dev.node_type = RDMA_NODE_IB_CA; > - dev->ib_dev.local_dma_lkey = 0 /* not supported for now */; > dev->num_ports = MLX5_CAP_GEN(mdev, num_ports); > dev->ib_dev.phys_port_cnt = dev->num_ports; > dev->ib_dev.num_comp_vectors = > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw.c > b/drivers/net/ethernet/mellanox/mlx5/core/fw.c > index 9335e5a..aa0d5ff 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/fw.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw.c > @@ -200,3 +200,25 @@ int mlx5_cmd_teardown_hca(struct mlx5_core_dev *dev) > > return err; > } > + > +int mlx5_core_query_special_context(struct mlx5_core_dev *dev, u32 > *rsvd_lkey) > +{ > + struct mlx5_cmd_query_special_contexts_mbox_in in; > + struct mlx5_cmd_query_special_contexts_mbox_out out; > + int err; > + > + memset(&in, 0, sizeof(in)); > + memset(&out, 0, sizeof(out)); > + in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); > + 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); > + > + *rsvd_lkey = be32_to_cpu(out.resd_lkey); > + > + return err; > +} > +EXPORT_SYMBOL(mlx5_core_query_special_context); > diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h > index b943cd9..6e4169c 100644 > --- a/include/linux/mlx5/device.h > +++ b/include/linux/mlx5/device.h > @@ -402,6 +402,17 @@ struct mlx5_cmd_teardown_hca_mbox_out { > u8 rsvd[8]; > }; > > +struct mlx5_cmd_query_special_contexts_mbox_in { > + struct mlx5_inbox_hdr hdr; > + u8 rsvd[8]; > +}; > + > +struct mlx5_cmd_query_special_contexts_mbox_out { > + struct mlx5_outbox_hdr hdr; > + __be32 dump_fill_mkey; > + __be32 resd_lkey; > +}; > + > struct mlx5_cmd_layout { > u8 type; > u8 rsvd0[3]; > diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h > index 5722d88..1e2e48c 100644 > --- a/include/linux/mlx5/driver.h > +++ b/include/linux/mlx5/driver.h > @@ -828,6 +828,7 @@ void *mlx5_get_protocol_dev(struct mlx5_core_dev *mdev, > int protocol); > int mlx5_register_interface(struct mlx5_interface *intf); > void mlx5_unregister_interface(struct mlx5_interface *intf); > int mlx5_core_query_vendor_id(struct mlx5_core_dev *mdev, u32 *vendor_id); > +int mlx5_core_query_special_context(struct mlx5_core_dev *dev, u32 > *rsvd_lkey); > > struct mlx5_profile { > u64 mask; -- Chuck Lever -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
