From: Mark Zhang <markz@mellanox.com>
Date: Fri, 15 Nov 2019 17:45:55 +0200
Subject: IB/mlx5: Support extended number of strides for Striding RQ
Patch-mainline: v5.5-rc1
Git-commit: c16339b69c0d58f456154b43fc396b1f1c3dc055
References: jsc#SLE-8446
Extends the minimum single WQE strides from 64 to 8, which is exposed
by the "min_single_wqe_log_num_of_strides" field of striding_rq_caps.
Choose right number of strides based on FW capability.
Link: https://lore.kernel.org/r/20191115154555.247856-1-leon@kernel.org
Signed-off-by: Mark Zhang <markz@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 | 10 ++++++-
drivers/infiniband/hw/mlx5/mlx5_ib.h | 1
drivers/infiniband/hw/mlx5/qp.c | 44 +++++++++++++++++++++++++++--------
3 files changed, 43 insertions(+), 12 deletions(-)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1149,8 +1149,14 @@ static int mlx5_ib_query_device(struct i
MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES;
resp.striding_rq_caps.max_single_stride_log_num_of_bytes =
MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES;
- resp.striding_rq_caps.min_single_wqe_log_num_of_strides =
- MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
+ if (MLX5_CAP_GEN(dev->mdev, ext_stride_num_range))
+ resp.striding_rq_caps
+ .min_single_wqe_log_num_of_strides =
+ MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
+ else
+ resp.striding_rq_caps
+ .min_single_wqe_log_num_of_strides =
+ MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
resp.striding_rq_caps.max_single_wqe_log_num_of_strides =
MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES;
resp.striding_rq_caps.supported_qpts =
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -291,6 +291,7 @@ enum mlx5_ib_wq_flags {
#define MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES 16
#define MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES 6
#define MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES 13
+#define MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES 3
struct mlx5_ib_rwq {
struct ib_wq ibwq;
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -5959,12 +5959,21 @@ static int create_rq(struct mlx5_ib_rwq
}
MLX5_SET(wq, wq, log_wq_stride, rwq->log_rq_stride);
if (rwq->create_flags & MLX5_IB_WQ_FLAGS_STRIDING_RQ) {
+ /*
+ * In Firmware number of strides in each WQE is:
+ * "512 * 2^single_wqe_log_num_of_strides"
+ * Values 3 to 8 are accepted as 10 to 15, 9 to 18 are
+ * accepted as 0 to 9
+ */
+ static const u8 fw_map[] = { 10, 11, 12, 13, 14, 15, 0, 1,
+ 2, 3, 4, 5, 6, 7, 8, 9 };
MLX5_SET(wq, wq, two_byte_shift_en, rwq->two_byte_shift_en);
MLX5_SET(wq, wq, log_wqe_stride_size,
rwq->single_stride_log_num_of_bytes -
MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES);
- MLX5_SET(wq, wq, log_wqe_num_of_strides, rwq->log_num_strides -
- MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES);
+ MLX5_SET(wq, wq, log_wqe_num_of_strides,
+ fw_map[rwq->log_num_strides -
+ MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES]);
}
MLX5_SET(wq, wq, log_wq_sz, rwq->log_rq_size);
MLX5_SET(wq, wq, pd, to_mpd(pd)->pdn);
@@ -6039,6 +6048,19 @@ static int set_user_rq_size(struct mlx5_
return 0;
}
+static bool log_of_strides_valid(struct mlx5_ib_dev *dev, u32 log_num_strides)
+{
+ if ((log_num_strides > MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES) ||
+ (log_num_strides < MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES))
+ return false;
+
+ if (!MLX5_CAP_GEN(dev->mdev, ext_stride_num_range) &&
+ (log_num_strides < MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES))
+ return false;
+
+ return true;
+}
+
static int prepare_user_rq(struct ib_pd *pd,
struct ib_wq_init_attr *init_attr,
struct ib_udata *udata,
@@ -6086,14 +6108,16 @@ static int prepare_user_rq(struct ib_pd
MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES);
return -EINVAL;
}
- if ((ucmd.single_wqe_log_num_of_strides >
- MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES) ||
- (ucmd.single_wqe_log_num_of_strides <
- MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES)) {
- mlx5_ib_dbg(dev, "Invalid log num strides (%u. Range is %u - %u)\n",
- ucmd.single_wqe_log_num_of_strides,
- MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES,
- MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES);
+ if (!log_of_strides_valid(dev,
+ ucmd.single_wqe_log_num_of_strides)) {
+ mlx5_ib_dbg(
+ dev,
+ "Invalid log num strides (%u. Range is %u - %u)\n",
+ ucmd.single_wqe_log_num_of_strides,
+ MLX5_CAP_GEN(dev->mdev, ext_stride_num_range) ?
+ MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES :
+ MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES,
+ MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES);
return -EINVAL;
}
rwq->single_stride_log_num_of_bytes =