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RDMA/mlx5: Return ECE data after modify QP 

After users sets the ECE option, FW will return the agreed/supported bits
through an output structures of modify QP stages for regular QPs or
through create QP for the DCT.

Link: https://lore.kernel.org/r/20200526115440.205922-9-leon@kernel.org
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky 2020-05-26 14:54:40 +03:00 committed by Jason Gunthorpe
parent 5f62a521ff
commit 50aec2c313
3 changed files with 48 additions and 4 deletions
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25
drivers/infiniband/hw/mlx5/qp.c
View File

@ -3708,6 +3708,7 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
enum ib_qp_state cur_state,
enum ib_qp_state new_state,
const struct mlx5_ib_modify_qp *ucmd,
struct mlx5_ib_modify_qp_resp *resp,
struct ib_udata *udata)
{
static const u16 optab[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE] = {
@ -3978,10 +3979,15 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
err = modify_raw_packet_qp(dev, qp, &raw_qp_param, tx_affinity);
} else {
u32 ece = MLX5_CAP_GEN(dev->mdev, ece_support) ?
ucmd->ece_options : 0;
if (udata) {
/* For the kernel flows, the resp will stay zero */
resp->ece_options =
MLX5_CAP_GEN(dev->mdev, ece_support) ?
ucmd->ece_options : 0;
resp->response_length = sizeof(*resp);
}
err = mlx5_core_qp_modify(dev, op, optpar, qpc, &base->mqp,
&ece);
&resp->ece_options);
}
if (err)
@ -4180,6 +4186,7 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
struct mlx5_ib_modify_qp_resp resp = {};
struct mlx5_ib_qp *qp = to_mqp(ibqp);
struct mlx5_ib_modify_qp ucmd = {};
enum ib_qp_type qp_type;
@ -4292,7 +4299,17 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
}
err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state,
new_state, &ucmd, udata);
new_state, &ucmd, &resp, udata);
/* resp.response_length is set in ECE supported flows only */
if (!err && resp.response_length &&
udata->outlen >= resp.response_length)
/*
* We don't check return value of the function below
* on purpose, because it is unclear how to unwind the
* error flow after QP was modified to the new state.
*/
ib_copy_to_udata(udata, &resp, resp.response_length);
out:
mutex_unlock(&qp->mutex);

25
drivers/infiniband/hw/mlx5/qpc.c
View File

@ -341,6 +341,27 @@ static void mbox_free(struct mbox_info *mbox)
kfree(mbox->out);
}
static int get_ece_from_mbox(void *out, u16 opcode)
{
int ece = 0;
switch (opcode) {
case MLX5_CMD_OP_INIT2RTR_QP:
ece = MLX5_GET(init2rtr_qp_out, out, ece);
break;
case MLX5_CMD_OP_RTR2RTS_QP:
ece = MLX5_GET(rtr2rts_qp_out, out, ece);
break;
case MLX5_CMD_OP_RTS2RTS_QP:
ece = MLX5_GET(rts2rts_qp_out, out, ece);
break;
default:
break;
}
return ece;
}
static int modify_qp_mbox_alloc(struct mlx5_core_dev *dev, u16 opcode, int qpn,
u32 opt_param_mask, void *qpc,
struct mbox_info *mbox, u16 uid, u32 ece)
@ -438,6 +459,10 @@ int mlx5_core_qp_modify(struct mlx5_ib_dev *dev, u16 opcode, u32 opt_param_mask,
err = mlx5_cmd_exec(dev->mdev, mbox.in, mbox.inlen, mbox.out,
mbox.outlen);
if (ece)
*ece = get_ece_from_mbox(mbox.out, opcode);
mbox_free(&mbox);
return err;
}

2
include/uapi/rdma/mlx5-abi.h
View File

@ -429,6 +429,8 @@ struct mlx5_ib_modify_qp {
struct mlx5_ib_modify_qp_resp {
__u32 response_length;
__u32 dctn;
__u32 ece_options;
__u32 reserved;
};
struct mlx5_ib_create_wq_resp {