[v2,1/7] net/mlx5: rename confusing object in probe code

  There are several attribute objects in this function:

- IB device attributes (struct ibv_device_attr_ex device_attr).
- Direct Verbs attributes (struct mlx5dv_context attrs_out).
- Port attributes (struct ibv_port_attr).
- IB device attributes again (struct ibv_device_attr_ex device_attr_ex).

"attrs_out" is both odd and initialized using a nonstandard syntax. Rename
it "dv_attr" for consistency.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
--
v2 changes:

- Fixed ctx -> attr_ctx in mlx5_pci_probe().
---
 drivers/net/mlx5/mlx5.c | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)
  

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Adrien Mazarguil
> Sent: Thursday, June 14, 2018 4:35 PM
> To: Shahaf Shuler <shahafs@mellanox.com>
> Cc: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH v2 1/7] net/mlx5: rename confusing object in probe code
> 
> There are several attribute objects in this function:
> 
> - IB device attributes (struct ibv_device_attr_ex device_attr).
> - Direct Verbs attributes (struct mlx5dv_context attrs_out).
> - Port attributes (struct ibv_port_attr).
> - IB device attributes again (struct ibv_device_attr_ex device_attr_ex).
> 
> "attrs_out" is both odd and initialized using a nonstandard syntax. Rename it "dv_attr" for
> consistency.
> 
> Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> --
> v2 changes:
> 
> - Fixed ctx -> attr_ctx in mlx5_pci_probe().
> ---
>  drivers/net/mlx5/mlx5.c | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index 3e0a1b186..3bdcb3970 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -654,6 +654,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,  {
>  	struct ibv_device **list = NULL;
>  	struct ibv_device *ibv_dev;
> +	struct mlx5dv_context dv_attr = { .comp_mask = 0 };
>  	int err = 0;
>  	struct ibv_context *attr_ctx = NULL;
>  	struct ibv_device_attr_ex device_attr; @@ -670,7 +671,6 @@ mlx5_pci_probe(struct rte_pci_driver
> *pci_drv __rte_unused,
>  	unsigned int mprq_min_stride_num_n = 0;
>  	unsigned int mprq_max_stride_num_n = 0;
>  	int i;
> -	struct mlx5dv_context attrs_out = {0};
>  #ifdef HAVE_IBV_DEVICE_COUNTERS_SET_SUPPORT
>  	struct ibv_counter_set_description cs_desc = { .counter_type = 0 };  #endif @@ -736,21 +736,21
> @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  	ibv_dev = list[i];
>  	DRV_LOG(DEBUG, "device opened");
>  #ifdef HAVE_IBV_MLX5_MOD_SWP
> -	attrs_out.comp_mask |= MLX5DV_CONTEXT_MASK_SWP;
> +	dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_SWP;
>  #endif
>  	/*
>  	 * Multi-packet send is supported by ConnectX-4 Lx PF as well
>  	 * as all ConnectX-5 devices.
>  	 */
>  #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
> -	attrs_out.comp_mask |= MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS;
> +	dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS;
>  #endif
>  #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
> -	attrs_out.comp_mask |= MLX5DV_CONTEXT_MASK_STRIDING_RQ;
> +	dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_STRIDING_RQ;
>  #endif
> -	mlx5_glue->dv_query_device(attr_ctx, &attrs_out);
> -	if (attrs_out.flags & MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED) {
> -		if (attrs_out.flags & MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW) {
> +	mlx5_glue->dv_query_device(attr_ctx, &dv_attr);
> +	if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED) {
> +		if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW) {
>  			DRV_LOG(DEBUG, "enhanced MPW is supported");
>  			mps = MLX5_MPW_ENHANCED;
>  		} else {
> @@ -762,14 +762,14 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  		mps = MLX5_MPW_DISABLED;
>  	}
>  #ifdef HAVE_IBV_MLX5_MOD_SWP
> -	if (attrs_out.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
> -		swp = attrs_out.sw_parsing_caps.sw_parsing_offloads;
> +	if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
> +		swp = dv_attr.sw_parsing_caps.sw_parsing_offloads;
>  	DRV_LOG(DEBUG, "SWP support: %u", swp);  #endif  #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
> -	if (attrs_out.comp_mask & MLX5DV_CONTEXT_MASK_STRIDING_RQ) {
> +	if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_STRIDING_RQ) {
>  		struct mlx5dv_striding_rq_caps mprq_caps =
> -			attrs_out.striding_rq_caps;
> +			dv_attr.striding_rq_caps;
> 
>  		DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %d",
>  			mprq_caps.min_single_stride_log_num_of_bytes);
> @@ -794,15 +794,15 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  	}
>  #endif
>  	if (RTE_CACHE_LINE_SIZE == 128 &&
> -	    !(attrs_out.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP))
> +	    !(dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP))
>  		cqe_comp = 0;
>  	else
>  		cqe_comp = 1;
>  #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
> -	if (attrs_out.comp_mask & MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS) {
> -		tunnel_en = ((attrs_out.tunnel_offloads_caps &
> +	if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS) {
> +		tunnel_en = ((dv_attr.tunnel_offloads_caps &
>  			      MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_VXLAN) &&
> -			     (attrs_out.tunnel_offloads_caps &
> +			     (dv_attr.tunnel_offloads_caps &
>  			      MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_GRE));
>  	}
>  	DRV_LOG(DEBUG, "tunnel offloading is %ssupported", @@ -812,9 +812,9 @@ mlx5_pci_probe(struct
> rte_pci_driver *pci_drv __rte_unused,
>  		"tunnel offloading disabled due to old OFED/rdma-core version");  #endif  #ifdef
> HAVE_IBV_DEVICE_MPLS_SUPPORT
> -	mpls_en = ((attrs_out.tunnel_offloads_caps &
> +	mpls_en = ((dv_attr.tunnel_offloads_caps &
>  		    MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_GRE) &&
> -		   (attrs_out.tunnel_offloads_caps &
> +		   (dv_attr.tunnel_offloads_caps &
>  		    MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_UDP));
>  	DRV_LOG(DEBUG, "MPLS over GRE/UDP tunnel offloading is %ssupported",
>  		mpls_en ? "" : "not ");
> --
> 2.11.0

Reviewed-by: Xueming Li <xuemingl@mellanox.com>