From: Bodong Wang <bodong@mellanox.com>
Date: Mon, 19 Mar 2018 15:10:30 +0200
Subject: IB/mlx5: Packet packing enhancement for RAW QP
Patch-mainline: v4.17-rc1
Git-commit: 61147f391a8b3bdde4c0a631dd132d85d00b90a0
References: bsc#1103991 FATE#326007
Enable RAW QP to be able to configure burst control by modify_qp. By
using burst control with rate limiting, user can achieve best
performance and accuracy. The burst control information is passed by
user through udata.
This patch also reports burst control capability for mlx5 related
hardwares, burst control is only marked as supported when both
packet_pacing_burst_bound and packet_pacing_typical_size are
supported.
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/mlx5/main.c | 4 +
drivers/infiniband/hw/mlx5/mlx5_ib.h | 2
drivers/infiniband/hw/mlx5/qp.c | 94 +++++++++++++++++++++++++++--------
include/uapi/rdma/mlx5-abi.h | 19 ++++++-
4 files changed, 98 insertions(+), 21 deletions(-)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -989,6 +989,10 @@ static int mlx5_ib_query_device(struct i
MLX5_CAP_QOS(mdev, packet_pacing_min_rate);
resp.packet_pacing_caps.supported_qpts |=
1 << IB_QPT_RAW_PACKET;
+ if (MLX5_CAP_QOS(mdev, packet_pacing_burst_bound) &&
+ MLX5_CAP_QOS(mdev, packet_pacing_typical_size))
+ resp.packet_pacing_caps.cap_flags |=
+ MLX5_IB_PP_SUPPORT_BURST;
}
resp.response_length += sizeof(resp.packet_pacing_caps);
}
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -403,7 +403,7 @@ struct mlx5_ib_qp {
struct list_head qps_list;
struct list_head cq_recv_list;
struct list_head cq_send_list;
- u32 rate_limit;
+ struct mlx5_rate_limit rl;
u32 underlay_qpn;
bool tunnel_offload_en;
/* storage for qp sub type when core qp type is IB_QPT_DRIVER */
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -86,7 +86,9 @@ struct mlx5_modify_raw_qp_param {
u16 operation;
u32 set_mask; /* raw_qp_set_mask_map */
- u32 rate_limit;
+
+ struct mlx5_rate_limit rl;
+
u8 rq_q_ctr_id;
};
@@ -2774,8 +2776,9 @@ static int modify_raw_packet_qp_sq(struc
const struct mlx5_modify_raw_qp_param *raw_qp_param)
{
struct mlx5_ib_qp *ibqp = sq->base.container_mibqp;
- u32 old_rate = ibqp->rate_limit;
- u32 new_rate = old_rate;
+ struct mlx5_rate_limit old_rl = ibqp->rl;
+ struct mlx5_rate_limit new_rl = old_rl;
+ bool new_rate_added = false;
u16 rl_index = 0;
void *in;
void *sqc;
@@ -2797,39 +2800,43 @@ static int modify_raw_packet_qp_sq(struc
pr_warn("%s: Rate limit can only be changed when SQ is moving to RDY\n",
__func__);
else
- new_rate = raw_qp_param->rate_limit;
+ new_rl = raw_qp_param->rl;
}
- if (old_rate != new_rate) {
- if (new_rate) {
- err = mlx5_rl_add_rate(dev, new_rate, &rl_index);
+ if (!mlx5_rl_are_equal(&old_rl, &new_rl)) {
+ if (new_rl.rate) {
+ err = mlx5_rl_add_rate(dev, &rl_index, &new_rl);
if (err) {
- pr_err("Failed configuring rate %u: %d\n",
- new_rate, err);
+ pr_err("Failed configuring rate limit(err %d): \
+ rate %u, max_burst_sz %u, typical_pkt_sz %u\n",
+ err, new_rl.rate, new_rl.max_burst_sz,
+ new_rl.typical_pkt_sz);
+
goto out;
}
+ new_rate_added = true;
}
MLX5_SET64(modify_sq_in, in, modify_bitmask, 1);
+ /* index 0 means no limit */
MLX5_SET(sqc, sqc, packet_pacing_rate_limit_index, rl_index);
}
err = mlx5_core_modify_sq(dev, sq->base.mqp.qpn, in, inlen);
if (err) {
/* Remove new rate from table if failed */
- if (new_rate &&
- old_rate != new_rate)
- mlx5_rl_remove_rate(dev, new_rate);
+ if (new_rate_added)
+ mlx5_rl_remove_rate(dev, &new_rl);
goto out;
}
/* Only remove the old rate after new rate was set */
- if ((old_rate &&
- (old_rate != new_rate)) ||
+ if ((old_rl.rate &&
+ !mlx5_rl_are_equal(&old_rl, &new_rl)) ||
(new_state != MLX5_SQC_STATE_RDY))
- mlx5_rl_remove_rate(dev, old_rate);
+ mlx5_rl_remove_rate(dev, &old_rl);
- ibqp->rate_limit = new_rate;
+ ibqp->rl = new_rl;
sq->state = new_state;
out:
@@ -2906,7 +2913,8 @@ static int modify_raw_packet_qp(struct m
static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
const struct ib_qp_attr *attr, int attr_mask,
- enum ib_qp_state cur_state, enum ib_qp_state new_state)
+ enum ib_qp_state cur_state, enum ib_qp_state new_state,
+ const struct mlx5_ib_modify_qp *ucmd)
{
static const u16 optab[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE] = {
[MLX5_QP_STATE_RST] = {
@@ -3144,7 +3152,30 @@ static int __mlx5_ib_modify_qp(struct ib
}
if (attr_mask & IB_QP_RATE_LIMIT) {
- raw_qp_param.rate_limit = attr->rate_limit;
+ raw_qp_param.rl.rate = attr->rate_limit;
+
+ if (ucmd->burst_info.max_burst_sz) {
+ if (attr->rate_limit &&
+ MLX5_CAP_QOS(dev->mdev, packet_pacing_burst_bound)) {
+ raw_qp_param.rl.max_burst_sz =
+ ucmd->burst_info.max_burst_sz;
+ } else {
+ err = -EINVAL;
+ goto out;
+ }
+ }
+
+ if (ucmd->burst_info.typical_pkt_sz) {
+ if (attr->rate_limit &&
+ MLX5_CAP_QOS(dev->mdev, packet_pacing_typical_size)) {
+ raw_qp_param.rl.typical_pkt_sz =
+ ucmd->burst_info.typical_pkt_sz;
+ } else {
+ err = -EINVAL;
+ goto out;
+ }
+ }
+
raw_qp_param.set_mask |= MLX5_RAW_QP_RATE_LIMIT;
}
@@ -3332,8 +3363,10 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp
{
struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
struct mlx5_ib_qp *qp = to_mqp(ibqp);
+ struct mlx5_ib_modify_qp ucmd = {};
enum ib_qp_type qp_type;
enum ib_qp_state cur_state, new_state;
+ size_t required_cmd_sz;
int err = -EINVAL;
int port;
enum rdma_link_layer ll = IB_LINK_LAYER_UNSPECIFIED;
@@ -3341,6 +3374,28 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp
if (ibqp->rwq_ind_tbl)
return -ENOSYS;
+ if (udata && udata->inlen) {
+ required_cmd_sz = offsetof(typeof(ucmd), reserved) +
+ sizeof(ucmd.reserved);
+ if (udata->inlen < required_cmd_sz)
+ return -EINVAL;
+
+ if (udata->inlen > sizeof(ucmd) &&
+ !ib_is_udata_cleared(udata, sizeof(ucmd),
+ udata->inlen - sizeof(ucmd)))
+ return -EOPNOTSUPP;
+
+ if (ib_copy_from_udata(&ucmd, udata,
+ min(udata->inlen, sizeof(ucmd))))
+ return -EFAULT;
+
+ if (ucmd.comp_mask ||
+ memchr_inv(&ucmd.reserved, 0, sizeof(ucmd.reserved)) ||
+ memchr_inv(&ucmd.burst_info.reserved, 0,
+ sizeof(ucmd.burst_info.reserved)))
+ return -EOPNOTSUPP;
+ }
+
if (unlikely(ibqp->qp_type == IB_QPT_GSI))
return mlx5_ib_gsi_modify_qp(ibqp, attr, attr_mask);
@@ -3421,7 +3476,8 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp
goto out;
}
- err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
+ err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state,
+ new_state, &ucmd);
out:
mutex_unlock(&qp->mutex);
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -162,6 +162,10 @@ struct mlx5_ib_cqe_comp_caps {
__u32 supported_format; /* enum mlx5_ib_cqe_comp_res_format */
};
+enum mlx5_ib_packet_pacing_cap_flags {
+ MLX5_IB_PP_SUPPORT_BURST = 1 << 0,
+};
+
struct mlx5_packet_pacing_caps {
__u32 qp_rate_limit_min;
__u32 qp_rate_limit_max; /* In kpbs */
@@ -171,7 +175,8 @@ struct mlx5_packet_pacing_caps {
* supported_qpts |= 1 << IB_QPT_RAW_PACKET
*/
__u32 supported_qpts;
- __u32 reserved;
+ __u8 cap_flags; /* enum mlx5_ib_packet_pacing_cap_flags */
+ __u8 reserved[3];
};
enum mlx5_ib_mpw_caps {
@@ -361,6 +366,18 @@ struct mlx5_ib_create_ah_resp {
__u8 reserved[6];
};
+struct mlx5_ib_burst_info {
+ __u32 max_burst_sz;
+ __u16 typical_pkt_sz;
+ __u16 reserved;
+};
+
+struct mlx5_ib_modify_qp {
+ __u32 comp_mask;
+ struct mlx5_ib_burst_info burst_info;
+ __u32 reserved;
+};
+
struct mlx5_ib_modify_qp_resp {
__u32 response_length;
__u32 dctn;