Message ID | 1460410360-13104-2-git-send-email-hch@lst.de (mailing list archive) |
---|---|
State | Superseded |
Headers | show |
On Mon, Apr 11, 2016 at 02:32:29PM -0700, Christoph Hellwig wrote:
> From: Sagi Grimberg <sagig@grimberg.me>
Sagi sent it to ML approximately two weeks ago [1]
[1] http://www.spinics.net/lists/linux-rdma/msg34619.html
On Sun, Apr 17, 2016 at 04:53:41PM +0300, Leon Romanovsky wrote: > On Mon, Apr 11, 2016 at 02:32:29PM -0700, Christoph Hellwig wrote: > > From: Sagi Grimberg <sagig@grimberg.me> > > Sagi sent it to ML approximately two weeks ago [1] I know.. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 5acf346..049754f 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -530,7 +530,7 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, sizeof(struct mlx5_wqe_ctrl_seg)) / sizeof(struct mlx5_wqe_data_seg); props->max_sge = min(max_rq_sg, max_sq_sg); - props->max_sge_rd = props->max_sge; + props->max_sge_rd = MLX5_MAX_SGE_RD; props->max_cq = 1 << MLX5_CAP_GEN(mdev, log_max_cq); props->max_cqe = (1 << MLX5_CAP_GEN(mdev, log_max_cq_sz)) - 1; props->max_mr = 1 << MLX5_CAP_GEN(mdev, log_max_mkey); diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h index 8156e3c..b3575f3 100644 --- a/include/linux/mlx5/device.h +++ b/include/linux/mlx5/device.h @@ -392,6 +392,17 @@ enum { MLX5_CAP_OFF_CMDIF_CSUM = 46, }; +enum { + /* + * Max wqe size for rdma read is 512 bytes, so this + * limits our max_sge_rd as the wqe needs to fit: + * - ctrl segment (16 bytes) + * - rdma segment (16 bytes) + * - scatter elements (16 bytes each) + */ + MLX5_MAX_SGE_RD = (512 - 16 - 16) / 16 +}; + struct mlx5_inbox_hdr { __be16 opcode; u8 rsvd[4];