On Wed, Sep 15, 2021 at 10:47:53AM -0300, Jason Gunthorpe wrote:
> On Wed, Sep 15, 2021 at 02:11:23AM +0300, Leon Romanovsky wrote:
> > From: Meir Lichtinger <meirl@xxxxxxxxxx>
> >
> > UID field was added to alloc_uar and dealloc_uar PRM command, to specify
> > DevX UID for UAR. This change enables firmware validating user access to
> > its own UAR resources.
> >
> > For the kernel allocated UARs the UID will stay 0 as of today.
> >
> > Signed-off-by: Meir Lichtinger <meirl@xxxxxxxxxx>
> > Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxx>
> > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
> > drivers/infiniband/hw/mlx5/cmd.c | 24 ++++++++++++++
> > drivers/infiniband/hw/mlx5/cmd.h | 2 ++
> > drivers/infiniband/hw/mlx5/main.c | 55 +++++++++++++++++--------------
> > 3 files changed, 57 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/infiniband/hw/mlx5/cmd.c b/drivers/infiniband/hw/mlx5/cmd.c
> > index a8db8a051170..0fe3c4ceec43 100644
> > +++ b/drivers/infiniband/hw/mlx5/cmd.c
> > @@ -206,3 +206,27 @@ int mlx5_cmd_mad_ifc(struct mlx5_core_dev *dev, const void *inb, void *outb,
> > kfree(in);
> > return err;
> > }
> > +
> > +int mlx5_ib_cmd_uar_alloc(struct mlx5_core_dev *dev, u32 *uarn, u16 uid)
> > +{
> > + u32 out[MLX5_ST_SZ_DW(alloc_uar_out)] = {};
> > + u32 in[MLX5_ST_SZ_DW(alloc_uar_in)] = {};
> > + int err;
> > +
> > + MLX5_SET(alloc_uar_in, in, opcode, MLX5_CMD_OP_ALLOC_UAR);
> > + MLX5_SET(alloc_uar_in, in, uid, uid);
> > + err = mlx5_cmd_exec_inout(dev, alloc_uar, in, out);
> > + if (!err)
> > + *uarn = MLX5_GET(alloc_uar_out, out, uar);
>
> Success oriented flow:
>
> if (err)
> return err;
> *uarn = MLX5_GET(alloc_uar_out, out, uar);
> return 0;
>
> And why did we add entirely new functions instead of just adding a uid
> argument to the core ones? Or, why doesn't this delete the old core
> functions that look unused outside of IB anyhow?
We didn't want to add not-needed for mlx5_core uid field, the rest
comments are valid and I'm sorry that I missed them.
Thanks
>
> Jason
