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RDMA/mlx5: Enable vport loopback when user context or QP mandate 

A user can create a QP which can accept loopback traffic, but that's not
enough. We need to enable loopback on the vport as well. Currently vport
loopback is enabled only when more than 1 users are using the IB device,
update the logic to consider whatever a QP which supports loopback was
created, if so enable vport loopback even if there is only a single user.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mark Bloch 2018-09-17 13:30:49 +03:00 committed by Doug Ledford
parent 175edba856
commit 0042f9e458
3 changed files with 57 additions and 17 deletions
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36
drivers/infiniband/hw/mlx5/main.c
View File

@ -1571,28 +1571,44 @@ static void deallocate_uars(struct mlx5_ib_dev *dev,
mlx5_cmd_free_uar(dev->mdev, bfregi->sys_pages[i]);
}
static int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev)
int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp)
{
int err = 0;
mutex_lock(&dev->lb.mutex);
dev->lb.user_td++;
if (td)
dev->lb.user_td++;
if (qp)
dev->lb.qps++;
if (dev->lb.user_td == 2)
err = mlx5_nic_vport_update_local_lb(dev->mdev, true);
if (dev->lb.user_td == 2 ||
dev->lb.qps == 1) {
if (!dev->lb.enabled) {
err = mlx5_nic_vport_update_local_lb(dev->mdev, true);
dev->lb.enabled = true;
}
}
mutex_unlock(&dev->lb.mutex);
return err;
}
static void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev)
void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev, bool td, bool qp)
{
mutex_lock(&dev->lb.mutex);
dev->lb.user_td--;
if (td)
dev->lb.user_td--;
if (qp)
dev->lb.qps--;
if (dev->lb.user_td < 2)
mlx5_nic_vport_update_local_lb(dev->mdev, false);
if (dev->lb.user_td == 1 &&
dev->lb.qps == 0) {
if (dev->lb.enabled) {
mlx5_nic_vport_update_local_lb(dev->mdev, false);
dev->lb.enabled = false;
}
}
mutex_unlock(&dev->lb.mutex);
}
@ -1613,7 +1629,7 @@ static int mlx5_ib_alloc_transport_domain(struct mlx5_ib_dev *dev, u32 *tdn)
!MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
return err;
return mlx5_ib_enable_lb(dev);
return mlx5_ib_enable_lb(dev, true, false);
}
static void mlx5_ib_dealloc_transport_domain(struct mlx5_ib_dev *dev, u32 tdn)
@ -1628,7 +1644,7 @@ static void mlx5_ib_dealloc_transport_domain(struct mlx5_ib_dev *dev, u32 tdn)
!MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
return;
mlx5_ib_disable_lb(dev);
mlx5_ib_disable_lb(dev, true, false);
}
static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,

4
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -862,6 +862,8 @@ struct mlx5_ib_lb_state {
/* protect the user_td */
struct mutex mutex;
u32 user_td;
int qps;
bool enabled;
};
struct mlx5_ib_dev {
@ -1020,6 +1022,8 @@ int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr);
int mlx5_ib_destroy_srq(struct ib_srq *srq);
int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr);
int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp);
void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev, bool td, bool qp);
struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata);

34
drivers/infiniband/hw/mlx5/qp.c
View File

@ -1256,6 +1256,16 @@ static bool tunnel_offload_supported(struct mlx5_core_dev *dev)
MLX5_CAP_ETH(dev, tunnel_stateless_geneve_rx));
}
static void destroy_raw_packet_qp_tir(struct mlx5_ib_dev *dev,
struct mlx5_ib_rq *rq,
u32 qp_flags_en)
{
if (qp_flags_en & (MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC |
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC))
mlx5_ib_disable_lb(dev, false, true);
mlx5_core_destroy_tir(dev->mdev, rq->tirn);
}
static int create_raw_packet_qp_tir(struct mlx5_ib_dev *dev,
struct mlx5_ib_rq *rq, u32 tdn,
u32 *qp_flags_en)
@ -1293,17 +1303,17 @@ static int create_raw_packet_qp_tir(struct mlx5_ib_dev *dev,
err = mlx5_core_create_tir(dev->mdev, in, inlen, &rq->tirn);
if (!err && MLX5_GET(tirc, tirc, self_lb_block)) {
err = mlx5_ib_enable_lb(dev, false, true);
if (err)
destroy_raw_packet_qp_tir(dev, rq, 0);
}
kvfree(in);
return err;
}
static void destroy_raw_packet_qp_tir(struct mlx5_ib_dev *dev,
struct mlx5_ib_rq *rq)
{
mlx5_core_destroy_tir(dev->mdev, rq->tirn);
}
static int create_raw_packet_qp(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
u32 *in, size_t inlen,
struct ib_pd *pd)
@ -1372,7 +1382,7 @@ static void destroy_raw_packet_qp(struct mlx5_ib_dev *dev,
struct mlx5_ib_rq *rq = &raw_packet_qp->rq;
if (qp->rq.wqe_cnt) {
destroy_raw_packet_qp_tir(dev, rq);
destroy_raw_packet_qp_tir(dev, rq, qp->flags_en);
destroy_raw_packet_qp_rq(dev, rq);
}
@ -1396,6 +1406,9 @@ static void raw_packet_qp_copy_info(struct mlx5_ib_qp *qp,
static void destroy_rss_raw_qp_tir(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
{
if (qp->flags_en & (MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC |
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC))
mlx5_ib_disable_lb(dev, false, true);
mlx5_core_destroy_tir(dev->mdev, qp->rss_qp.tirn);
}
@ -1606,6 +1619,13 @@ static int create_rss_raw_qp_tir(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
create_tir:
err = mlx5_core_create_tir(dev->mdev, in, inlen, &qp->rss_qp.tirn);
if (!err && MLX5_GET(tirc, tirc, self_lb_block)) {
err = mlx5_ib_enable_lb(dev, false, true);
if (err)
mlx5_core_destroy_tir(dev->mdev, qp->rss_qp.tirn);
}
if (err)
goto err;