linux-kernel - Re: [PATCH v5 11/27] IB/Verbs: Reform route related part in IB-core cma

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Message-ID: <20150422000719.GK15893@phlsvsds.ph.intel.com>
Date:	Tue, 21 Apr 2015 20:07:19 -0400
From:	"ira.weiny" <ira.weiny@...el.com>
To:	Michael Wang <yun.wang@...fitbricks.com>
Cc:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, hal@....mellanox.co.il,
	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Tom Talpey <tom@...pey.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v5 11/27] IB/Verbs: Reform route related part in IB-core cma

On Mon, Apr 20, 2015 at 10:37:13AM +0200, Michael Wang wrote:
> 
> Use raw management helpers to reform route related part in IB-core cma.
> 
> Cc: Hal Rosenstock <hal@....mellanox.co.il>
> Cc: Steve Wise <swise@...ngridcomputing.com>
> Cc: Tom Talpey <tom@...pey.com>
> Cc: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> Cc: Doug Ledford <dledford@...hat.com>
> Cc: Ira Weiny <ira.weiny@...el.com>
> Cc: Sean Hefty <sean.hefty@...el.com>
> Signed-off-by: Michael Wang <yun.wang@...fitbricks.com>

Reviewed-by: Ira Weiny <ira.weiny@...el.com>

> ---
>  drivers/infiniband/core/cma.c  | 31 ++++++++-----------------------
>  drivers/infiniband/core/ucma.c | 25 ++++++-------------------
>  2 files changed, 14 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
> index 815e41b..fa69f34 100644
> --- a/drivers/infiniband/core/cma.c
> +++ b/drivers/infiniband/core/cma.c
> @@ -923,13 +923,9 @@ static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
>  
>  static void cma_cancel_route(struct rdma_id_private *id_priv)
>  {
> -	switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
> -	case IB_LINK_LAYER_INFINIBAND:
> +	if (rdma_tech_ib(id_priv->id.device, id_priv->id.port_num)) {
>  		if (id_priv->query)
>  			ib_sa_cancel_query(id_priv->query_id, id_priv->query);
> -		break;
> -	default:
> -		break;
>  	}
>  }
>  
> @@ -1957,26 +1953,15 @@ int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
>  		return -EINVAL;
>  
>  	atomic_inc(&id_priv->refcount);
> -	switch (rdma_node_get_transport(id->device->node_type)) {
> -	case RDMA_TRANSPORT_IB:
> -		switch (rdma_port_get_link_layer(id->device, id->port_num)) {
> -		case IB_LINK_LAYER_INFINIBAND:
> -			ret = cma_resolve_ib_route(id_priv, timeout_ms);
> -			break;
> -		case IB_LINK_LAYER_ETHERNET:
> -			ret = cma_resolve_iboe_route(id_priv);
> -			break;
> -		default:
> -			ret = -ENOSYS;
> -		}
> -		break;
> -	case RDMA_TRANSPORT_IWARP:
> +	if (rdma_tech_ib(id->device, id->port_num))
> +		ret = cma_resolve_ib_route(id_priv, timeout_ms);
> +	else if (rdma_tech_iboe(id->device, id->port_num))
> +		ret = cma_resolve_iboe_route(id_priv);
> +	else if (rdma_tech_iwarp(id->device, id->port_num))
>  		ret = cma_resolve_iw_route(id_priv, timeout_ms);
> -		break;
> -	default:
> +	else
>  		ret = -ENOSYS;
> -		break;
> -	}
> +
>  	if (ret)
>  		goto err;
>  
> diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
> index 45d67e9..7331c6c 100644
> --- a/drivers/infiniband/core/ucma.c
> +++ b/drivers/infiniband/core/ucma.c
> @@ -722,26 +722,13 @@ static ssize_t ucma_query_route(struct ucma_file *file,
>  
>  	resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid;
>  	resp.port_num = ctx->cm_id->port_num;
> -	switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) {
> -	case RDMA_TRANSPORT_IB:
> -		switch (rdma_port_get_link_layer(ctx->cm_id->device,
> -			ctx->cm_id->port_num)) {
> -		case IB_LINK_LAYER_INFINIBAND:
> -			ucma_copy_ib_route(&resp, &ctx->cm_id->route);
> -			break;
> -		case IB_LINK_LAYER_ETHERNET:
> -			ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
> -			break;
> -		default:
> -			break;
> -		}
> -		break;
> -	case RDMA_TRANSPORT_IWARP:
> +
> +	if (rdma_tech_ib(ctx->cm_id->device, ctx->cm_id->port_num))
> +		ucma_copy_ib_route(&resp, &ctx->cm_id->route);
> +	else if (rdma_tech_iboe(ctx->cm_id->device, ctx->cm_id->port_num))
> +		ucma_copy_iboe_route(&resp, &ctx->cm_id->route);
> +	else if (rdma_tech_iwarp(ctx->cm_id->device, ctx->cm_id->port_num))
>  		ucma_copy_iw_route(&resp, &ctx->cm_id->route);
> -		break;
> -	default:
> -		break;
> -	}
>  
>  out:
>  	if (copy_to_user((void __user *)(unsigned long)cmd.response,
> -- 
> 2.1.0
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