From d16e91daf446c605a92112889552f9df757186bc Mon Sep 17 00:00:00 2001 From: Haggai Eran Date: Mon, 29 Feb 2016 15:45:05 +0200 Subject: [PATCH] IB/mlx5: Add GSI QP wrapper mlx5 creates special GSI QPs that has limited ability to control the P_Key of transmitted packets. The sent P_Key is taken from the QP object, similarly to what happens with regular UD QPs. Create a software wrapper around GSI QPs that with the following patches will be able to emulate the functionality of a GSI QP including control of the P_Key per work request. Reviewed-by: Leon Romanovsky Signed-off-by: Haggai Eran Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx5/Makefile | 2 +- drivers/infiniband/hw/mlx5/gsi.c | 179 +++++++++++++++++++++++++++ drivers/infiniband/hw/mlx5/main.c | 2 + drivers/infiniband/hw/mlx5/mlx5_ib.h | 30 ++++- drivers/infiniband/hw/mlx5/qp.c | 50 ++++++-- 5 files changed, 249 insertions(+), 14 deletions(-) create mode 100644 drivers/infiniband/hw/mlx5/gsi.c diff --git a/drivers/infiniband/hw/mlx5/Makefile b/drivers/infiniband/hw/mlx5/Makefile index 27a70159e2ea..4e851889355a 100644 --- a/drivers/infiniband/hw/mlx5/Makefile +++ b/drivers/infiniband/hw/mlx5/Makefile @@ -1,4 +1,4 @@ obj-$(CONFIG_MLX5_INFINIBAND) += mlx5_ib.o -mlx5_ib-y := main.o cq.o doorbell.o qp.o mem.o srq.o mr.o ah.o mad.o +mlx5_ib-y := main.o cq.o doorbell.o qp.o mem.o srq.o mr.o ah.o mad.o gsi.o mlx5_ib-$(CONFIG_INFINIBAND_ON_DEMAND_PAGING) += odp.o diff --git a/drivers/infiniband/hw/mlx5/gsi.c b/drivers/infiniband/hw/mlx5/gsi.c new file mode 100644 index 000000000000..711655400ca5 --- /dev/null +++ b/drivers/infiniband/hw/mlx5/gsi.c @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2016, Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "mlx5_ib.h" + +struct mlx5_ib_gsi_qp { + struct ib_qp ibqp; + struct ib_qp *rx_qp; + u8 port_num; + struct ib_qp_cap cap; + enum ib_sig_type sq_sig_type; + /* Serialize qp state modifications */ + struct mutex mutex; +}; + +static struct mlx5_ib_gsi_qp *gsi_qp(struct ib_qp *qp) +{ + return container_of(qp, struct mlx5_ib_gsi_qp, ibqp); +} + +struct ib_qp *mlx5_ib_gsi_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *init_attr) +{ + struct mlx5_ib_dev *dev = to_mdev(pd->device); + struct mlx5_ib_gsi_qp *gsi; + struct ib_qp_init_attr hw_init_attr = *init_attr; + const u8 port_num = init_attr->port_num; + int ret; + + mlx5_ib_dbg(dev, "creating GSI QP\n"); + + if (port_num > ARRAY_SIZE(dev->devr.ports) || port_num < 1) { + mlx5_ib_warn(dev, + "invalid port number %d during GSI QP creation\n", + port_num); + return ERR_PTR(-EINVAL); + } + + gsi = kzalloc(sizeof(*gsi), GFP_KERNEL); + if (!gsi) + return ERR_PTR(-ENOMEM); + + mutex_init(&gsi->mutex); + + mutex_lock(&dev->devr.mutex); + + if (dev->devr.ports[port_num - 1].gsi) { + mlx5_ib_warn(dev, "GSI QP already exists on port %d\n", + port_num); + ret = -EBUSY; + goto err_free; + } + + gsi->cap = init_attr->cap; + gsi->sq_sig_type = init_attr->sq_sig_type; + gsi->ibqp.qp_num = 1; + gsi->port_num = port_num; + + hw_init_attr.qp_type = MLX5_IB_QPT_HW_GSI; + gsi->rx_qp = ib_create_qp(pd, &hw_init_attr); + if (IS_ERR(gsi->rx_qp)) { + mlx5_ib_warn(dev, "unable to create hardware GSI QP. error %ld\n", + PTR_ERR(gsi->rx_qp)); + ret = PTR_ERR(gsi->rx_qp); + goto err_free; + } + + dev->devr.ports[init_attr->port_num - 1].gsi = gsi; + + mutex_unlock(&dev->devr.mutex); + + return &gsi->ibqp; + +err_free: + mutex_unlock(&dev->devr.mutex); + kfree(gsi); + return ERR_PTR(ret); +} + +int mlx5_ib_gsi_destroy_qp(struct ib_qp *qp) +{ + struct mlx5_ib_dev *dev = to_mdev(qp->device); + struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp); + const int port_num = gsi->port_num; + int ret; + + mlx5_ib_dbg(dev, "destroying GSI QP\n"); + + mutex_lock(&dev->devr.mutex); + ret = ib_destroy_qp(gsi->rx_qp); + if (ret) { + mlx5_ib_warn(dev, "unable to destroy hardware GSI QP. error %d\n", + ret); + mutex_unlock(&dev->devr.mutex); + return ret; + } + dev->devr.ports[port_num - 1].gsi = NULL; + mutex_unlock(&dev->devr.mutex); + + kfree(gsi); + + return 0; +} + +int mlx5_ib_gsi_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, + int attr_mask) +{ + struct mlx5_ib_dev *dev = to_mdev(qp->device); + struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp); + int ret; + + mlx5_ib_dbg(dev, "modifying GSI QP to state %d\n", attr->qp_state); + + mutex_lock(&gsi->mutex); + ret = ib_modify_qp(gsi->rx_qp, attr, attr_mask); + mutex_unlock(&gsi->mutex); + + return ret; +} + +int mlx5_ib_gsi_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, + int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr) +{ + struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp); + int ret; + + mutex_lock(&gsi->mutex); + ret = ib_query_qp(gsi->rx_qp, qp_attr, qp_attr_mask, qp_init_attr); + qp_init_attr->cap = gsi->cap; + mutex_unlock(&gsi->mutex); + + return ret; +} + +int mlx5_ib_gsi_post_send(struct ib_qp *qp, struct ib_send_wr *wr, + struct ib_send_wr **bad_wr) +{ + struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp); + + return ib_post_send(gsi->rx_qp, wr, bad_wr); +} + +int mlx5_ib_gsi_post_recv(struct ib_qp *qp, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr) +{ + struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp); + + return ib_post_recv(gsi->rx_qp, wr, bad_wr); +} diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 76b0939cb2d4..0b30dc53c925 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1970,6 +1970,8 @@ static int create_dev_resources(struct mlx5_ib_resources *devr) dev = container_of(devr, struct mlx5_ib_dev, devr); + mutex_init(&devr->mutex); + devr->p0 = mlx5_ib_alloc_pd(&dev->ib_dev, NULL, NULL); if (IS_ERR(devr->p0)) { ret = PTR_ERR(devr->p0); diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 32699f92480a..c68a9135831f 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -163,6 +163,11 @@ struct mlx5_ib_flow_db { #define MLX5_IB_SEND_UMR_FAIL_IF_FREE (IB_SEND_RESERVED_START << 1) #define MLX5_IB_SEND_UMR_UPDATE_MTT (IB_SEND_RESERVED_START << 2) #define MLX5_IB_QPT_REG_UMR IB_QPT_RESERVED1 +/* + * IB_QPT_GSI creates the software wrapper around GSI, and MLX5_IB_QPT_HW_GSI + * creates the actual hardware QP. + */ +#define MLX5_IB_QPT_HW_GSI IB_QPT_RESERVED2 #define MLX5_IB_WR_UMR IB_WR_RESERVED1 /* Private QP creation flags to be passed in ib_qp_init_attr.create_flags. @@ -502,6 +507,12 @@ struct mlx5_mr_cache { unsigned long last_add; }; +struct mlx5_ib_gsi_qp; + +struct mlx5_ib_port_resources { + struct mlx5_ib_gsi_qp *gsi; +}; + struct mlx5_ib_resources { struct ib_cq *c0; struct ib_xrcd *x0; @@ -509,6 +520,9 @@ struct mlx5_ib_resources { struct ib_pd *p0; struct ib_srq *s0; struct ib_srq *s1; + struct mlx5_ib_port_resources ports[2]; + /* Protects changes to the port resources */ + struct mutex mutex; }; struct mlx5_roce { @@ -754,6 +768,20 @@ static inline void mlx5_ib_qp_enable_pagefaults(struct mlx5_ib_qp *qp) {} __be16 mlx5_get_roce_udp_sport(struct mlx5_ib_dev *dev, u8 port_num, int index); +/* GSI QP helper functions */ +struct ib_qp *mlx5_ib_gsi_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *init_attr); +int mlx5_ib_gsi_destroy_qp(struct ib_qp *qp); +int mlx5_ib_gsi_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, + int attr_mask); +int mlx5_ib_gsi_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, + int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr); +int mlx5_ib_gsi_post_send(struct ib_qp *qp, struct ib_send_wr *wr, + struct ib_send_wr **bad_wr); +int mlx5_ib_gsi_post_recv(struct ib_qp *qp, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr); + static inline void init_query_mad(struct ib_smp *mad) { mad->base_version = 1; @@ -773,7 +801,7 @@ static inline u8 convert_access(int acc) static inline int is_qp1(enum ib_qp_type qp_type) { - return qp_type == IB_QPT_GSI; + return qp_type == MLX5_IB_QPT_HW_GSI; } #define MLX5_MAX_UMR_SHIFT 16 diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index c8b12f984223..85cf9c4a9500 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -296,7 +296,7 @@ static int sq_overhead(struct ib_qp_init_attr *attr) sizeof(struct mlx5_wqe_eth_seg); /* fall through */ case IB_QPT_SMI: - case IB_QPT_GSI: + case MLX5_IB_QPT_HW_GSI: size += sizeof(struct mlx5_wqe_ctrl_seg) + sizeof(struct mlx5_wqe_datagram_seg); break; @@ -598,7 +598,7 @@ static int to_mlx5_st(enum ib_qp_type type) case IB_QPT_XRC_INI: case IB_QPT_XRC_TGT: return MLX5_QP_ST_XRC; case IB_QPT_SMI: return MLX5_QP_ST_QP0; - case IB_QPT_GSI: return MLX5_QP_ST_QP1; + case MLX5_IB_QPT_HW_GSI: return MLX5_QP_ST_QP1; case IB_QPT_RAW_IPV6: return MLX5_QP_ST_RAW_IPV6; case IB_QPT_RAW_PACKET: case IB_QPT_RAW_ETHERTYPE: return MLX5_QP_ST_RAW_ETHERTYPE; @@ -1530,7 +1530,7 @@ static void get_cqs(struct mlx5_ib_qp *qp, break; case IB_QPT_SMI: - case IB_QPT_GSI: + case MLX5_IB_QPT_HW_GSI: case IB_QPT_RC: case IB_QPT_UC: case IB_QPT_UD: @@ -1693,7 +1693,7 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, case IB_QPT_UC: case IB_QPT_UD: case IB_QPT_SMI: - case IB_QPT_GSI: + case MLX5_IB_QPT_HW_GSI: case MLX5_IB_QPT_REG_UMR: qp = kzalloc(sizeof(*qp), GFP_KERNEL); if (!qp) @@ -1722,6 +1722,9 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, break; + case IB_QPT_GSI: + return mlx5_ib_gsi_create_qp(pd, init_attr); + case IB_QPT_RAW_IPV6: case IB_QPT_RAW_ETHERTYPE: case IB_QPT_MAX: @@ -1740,6 +1743,9 @@ int mlx5_ib_destroy_qp(struct ib_qp *qp) struct mlx5_ib_dev *dev = to_mdev(qp->device); struct mlx5_ib_qp *mqp = to_mqp(qp); + if (unlikely(qp->qp_type == IB_QPT_GSI)) + return mlx5_ib_gsi_destroy_qp(qp); + destroy_qp_common(dev, mqp); kfree(mqp); @@ -2220,7 +2226,7 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp, } } - if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) { + if (is_sqp(ibqp->qp_type)) { context->mtu_msgmax = (IB_MTU_256 << 5) | 8; } else if (ibqp->qp_type == IB_QPT_UD || ibqp->qp_type == MLX5_IB_QPT_REG_UMR) { @@ -2403,11 +2409,18 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, { struct mlx5_ib_dev *dev = to_mdev(ibqp->device); struct mlx5_ib_qp *qp = to_mqp(ibqp); + enum ib_qp_type qp_type; enum ib_qp_state cur_state, new_state; int err = -EINVAL; int port; enum rdma_link_layer ll = IB_LINK_LAYER_UNSPECIFIED; + if (unlikely(ibqp->qp_type == IB_QPT_GSI)) + return mlx5_ib_gsi_modify_qp(ibqp, attr, attr_mask); + + qp_type = (unlikely(ibqp->qp_type == MLX5_IB_QPT_HW_GSI)) ? + IB_QPT_GSI : ibqp->qp_type; + mutex_lock(&qp->mutex); cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; @@ -2418,9 +2431,8 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, ll = dev->ib_dev.get_link_layer(&dev->ib_dev, port); } - if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR && - !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask, - ll)) { + if (qp_type != MLX5_IB_QPT_REG_UMR && + !ib_modify_qp_is_ok(cur_state, new_state, qp_type, attr_mask, ll)) { mlx5_ib_dbg(dev, "invalid QP state transition from %d to %d, qp_type %d, attr_mask 0x%x\n", cur_state, new_state, ibqp->qp_type, attr_mask); goto out; @@ -3304,13 +3316,13 @@ int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, { struct mlx5_wqe_ctrl_seg *ctrl = NULL; /* compiler warning */ struct mlx5_ib_dev *dev = to_mdev(ibqp->device); - struct mlx5_ib_qp *qp = to_mqp(ibqp); + struct mlx5_ib_qp *qp; struct mlx5_ib_mr *mr; struct mlx5_wqe_data_seg *dpseg; struct mlx5_wqe_xrc_seg *xrc; - struct mlx5_bf *bf = qp->bf; + struct mlx5_bf *bf; int uninitialized_var(size); - void *qend = qp->sq.qend; + void *qend; unsigned long flags; unsigned idx; int err = 0; @@ -3322,6 +3334,13 @@ int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, u8 next_fence = 0; u8 fence; + if (unlikely(ibqp->qp_type == IB_QPT_GSI)) + return mlx5_ib_gsi_post_send(ibqp, wr, bad_wr); + + qp = to_mqp(ibqp); + bf = qp->bf; + qend = qp->sq.qend; + spin_lock_irqsave(&qp->sq.lock, flags); for (nreq = 0; wr; nreq++, wr = wr->next) { @@ -3482,7 +3501,7 @@ int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, break; case IB_QPT_SMI: - case IB_QPT_GSI: + case MLX5_IB_QPT_HW_GSI: set_datagram_seg(seg, wr); seg += sizeof(struct mlx5_wqe_datagram_seg); size += sizeof(struct mlx5_wqe_datagram_seg) / 16; @@ -3631,6 +3650,9 @@ int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, int ind; int i; + if (unlikely(ibqp->qp_type == IB_QPT_GSI)) + return mlx5_ib_gsi_post_recv(ibqp, wr, bad_wr); + spin_lock_irqsave(&qp->rq.lock, flags); ind = qp->rq.head & (qp->rq.wqe_cnt - 1); @@ -3951,6 +3973,10 @@ int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int err = 0; u8 raw_packet_qp_state; + if (unlikely(ibqp->qp_type == IB_QPT_GSI)) + return mlx5_ib_gsi_query_qp(ibqp, qp_attr, qp_attr_mask, + qp_init_attr); + #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING /* * Wait for any outstanding page faults, in case the user frees memory -- 2.20.1