Re: [PATCH] IB/mlx: Expose max_fmr to ib_query_device

[Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>]

On Thu, Oct 29, 2015 at 07:21:45PM +0200, Sagi Grimberg wrote:
> Hi Yuval,
> 
> The title prefix should be IB/mlx4:
> 
> >Expose max_fmr so it will be available to ULPs.
> >max_fmr is num_mpts minus reserved.
> >
> >Signed-off-by: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
> >---
> >  drivers/infiniband/hw/mlx4/main.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> >
> >diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
> >index efecdf0..4f9ff35 100644
> >--- a/drivers/infiniband/hw/mlx4/main.c
> >+++ b/drivers/infiniband/hw/mlx4/main.c
> >@@ -475,6 +475,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
> >  	props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
> >  	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
> >  					   props->max_mcast_grp;
> >+	props->max_fmr = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
> 
> Umm, this looks like a capability that needs to communicated from the
> device. Perhaps this needs to be added to CX3 FW? Or?
Mellanox folks, can you review this driver change?
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