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IB/mlx5: Add support for setting source QP number

Browse source 
In order to create multiple GSI QPs, we need to set the source QP number to
one on all these QPs. Add the necessary definitions and infrastructure to
do that.

Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Haggai Eran 2016-02-29 15:45:03 +02:00 committed by Doug Ledford
parent c7ce833b36
commit b11a4f9cde
4 changed files with 34 additions and 3 deletions
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14
drivers/infiniband/hw/mlx5/mlx5_ib.h
View file

@ -165,6 +165,18 @@ struct mlx5_ib_flow_db {
#define MLX5_IB_QPT_REG_UMR IB_QPT_RESERVED1
#define MLX5_IB_WR_UMR IB_WR_RESERVED1
/* Private QP creation flags to be passed in ib_qp_init_attr.create_flags.
*
* These flags are intended for internal use by the mlx5_ib driver, and they
* rely on the range reserved for that use in the ib_qp_create_flags enum.
*/
/* Create a UD QP whose source QP number is 1 */
static inline enum ib_qp_create_flags mlx5_ib_create_qp_sqpn_qp1(void)
{
return IB_QP_CREATE_RESERVED_START;
}
struct wr_list {
u16 opcode;
u16 next;
@ -331,6 +343,8 @@ enum mlx5_ib_qp_flags {
MLX5_IB_QP_MANAGED_SEND = IB_QP_CREATE_MANAGED_SEND,
MLX5_IB_QP_MANAGED_RECV = IB_QP_CREATE_MANAGED_RECV,
MLX5_IB_QP_SIGNATURE_HANDLING = 1 << 5,
/* QP uses 1 as its source QP number */
MLX5_IB_QP_SQPN_QP1 = 1 << 6,
};
struct mlx5_umr_wr {

17
drivers/infiniband/hw/mlx5/qp.c
View file

@ -793,7 +793,8 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
uuari = &dev->mdev->priv.uuari;
if (init_attr->create_flags & ~(IB_QP_CREATE_SIGNATURE_EN |
IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
IB_QP_CREATE_IPOIB_UD_LSO))
IB_QP_CREATE_IPOIB_UD_LSO |
mlx5_ib_create_qp_sqpn_qp1()))
return -EINVAL;
if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR)
@ -838,6 +839,11 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
(*in)->ctx.params1 |= cpu_to_be32(1 << 11);
(*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4);
if (init_attr->create_flags & mlx5_ib_create_qp_sqpn_qp1()) {
(*in)->ctx.deth_sqpn = cpu_to_be32(1);
qp->flags |= MLX5_IB_QP_SQPN_QP1;
}
mlx5_fill_page_array(&qp->buf, (*in)->pas);
err = mlx5_db_alloc(dev->mdev, &qp->db);
@ -1289,6 +1295,11 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
ucmd.sq_wqe_count, max_wqes);
return -EINVAL;
}
if (init_attr->create_flags &
mlx5_ib_create_qp_sqpn_qp1()) {
mlx5_ib_dbg(dev, "user-space is not allowed to create UD QPs spoofing as QP1\n");
return -EINVAL;
}
err = create_user_qp(dev, pd, qp, udata, init_attr, &in,
&resp, &inlen, base);
if (err)
@ -2309,6 +2320,8 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
context->sq_crq_size |= cpu_to_be16(1 << 4);
if (qp->flags & MLX5_IB_QP_SQPN_QP1)
context->deth_sqpn = cpu_to_be32(1);
mlx5_cur = to_mlx5_state(cur_state);
mlx5_new = to_mlx5_state(new_state);
@ -3973,6 +3986,8 @@ int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
qp_init_attr->create_flags |= IB_QP_CREATE_MANAGED_SEND;
if (qp->flags & MLX5_IB_QP_MANAGED_RECV)
qp_init_attr->create_flags |= IB_QP_CREATE_MANAGED_RECV;
if (qp->flags & MLX5_IB_QP_SQPN_QP1)
qp_init_attr->create_flags |= mlx5_ib_create_qp_sqpn_qp1();
qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ?
IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;

3
include/linux/mlx5/mlx5_ifc.h
View file

@ -772,7 +772,8 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 reserved_at_22e[0x7];
u8 qkv[0x1];
u8 pkv[0x1];
u8 reserved_at_237[0x4];
u8 set_deth_sqpn[0x1];
u8 reserved_at_239[0x3];
u8 xrc[0x1];
u8 ud[0x1];
u8 uc[0x1];

3
include/linux/mlx5/qp.h
View file

@ -499,7 +499,8 @@ struct mlx5_qp_context {
u8 reserved2[4];
__be32 next_send_psn;
__be32 cqn_send;
u8 reserved3[8];
__be32 deth_sqpn;
u8 reserved3[4];
__be32 last_acked_psn;
__be32 ssn;
__be32 params2;