netdev - Re: [RFC v2 03/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) netdev

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Message-ID: <20161215170109.GC3264@obsidianresearch.com>
Date:   Thu, 15 Dec 2016 10:01:09 -0700
From:   Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:     "Vishwanathapura, Niranjana" <niranjana.vishwanathapura@...el.com>
Cc:     dledford@...hat.com, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, dennis.dalessandro@...el.com,
        ira.weiny@...el.com, Sadanand Warrier <sadanand.warrier@...el.com>,
        Sudeep Dutt <sudeep.dutt@...el.com>,
        Tanya K Jajodia <tanya.k.jajodia@...el.com>,
        Andrzej Kacprowski <andrzej.kacprowski@...el.com>
Subject: Re: [RFC v2 03/10] IB/hfi-vnic: Virtual Network Interface Controller
 (VNIC) netdev

On Wed, Dec 14, 2016 at 11:59:35PM -0800, Vishwanathapura, Niranjana wrote:
> +/**
> + * union hfi_vnic_bypass_hdr - VNIC bypass header
> + * @slid: source lid
> + * @length: length of packet
> + * @becn: backward explicit congestion notification
> + * @dlid: destination lid
> + * @sc: service class
> + * @fecn: forward explicit congestion notification
> + * @l2: L2 type (2=16B)
> + * @lt: link transfer field
> + * @l4: L4 type
> + * @slid_high: upper 4 bits of source lid
> + * @dlid_high: upper 4 bits of destination lid
> + * @pkey: partition key
> + * @entropy: entropy
> + * @age: packet age
> + * @l4_hdr: L4 header
> + */
> +union hfi_vnic_bypass_hdr {
> +	struct {
> +	struct {
> +		uint64_t slid   : 20;
> +		uint64_t length : 11;
> +		uint64_t becn   : 1;
> +		uint64_t dlid   : 20;
> +		uint64_t sc     : 5;
> +		uint64_t rsvd   : 3;
> +		uint64_t fecn   : 1;
> +		uint64_t l2     : 2;
> +		uint64_t lt     : 1;
> +	};
> +	struct {
> +		uint64_t l4        : 8;
> +		uint64_t slid_high : 4;
> +		uint64_t dlid_high : 4;
> +		uint64_t pkey      : 16;
> +		uint64_t entropy   : 16;
> +		uint64_t age       : 8;
> +		uint64_t rsvd1     : 8;
> +	};
> +	struct {
> +		uint32_t rsvd2  : 16;
> +		uint32_t l4_hdr : 16;
> +	};
> +	} __packed;
> +	u32 dw[5];
> +};

This isn't going to work on BE, please fix it.

> +/**
> + * struct __hfi_vesw_info - HFI vnic virtual switch info
> + */
> +struct __hfi_vesw_info {
> +	u16  fabric_id;
> +	u16  vesw_id;
> +
> +	u8   rsvd0[6];
> +	u16  def_port_mask;
> +
> +	u8   rsvd1[2];
> +	u16  pkey;
> +
> +	u8   rsvd2[4];
> +	u32  u_mcast_dlid;
> +	u32  u_ucast_dlid[HFI_VESW_MAX_NUM_DEF_PORT];
> +
> +	u8   rsvd3[44];
> +	u16  eth_mtu[HFI_VNIC_MAX_NUM_PCP];
> +	u16  eth_mtu_non_vlan;
> +	u8   rsvd4[2];
> +} __packed;

This goes on the network too? Also looks like it has endian problems.

Ditto for all the __packed structures.

> +#define v_dbg(format, arg...) \
> +	netdev_dbg(adapter->netdev, format, ## arg)
> +#define v_err(format, arg...) \
> +	netdev_err(adapter->netdev, format, ## arg)
> +#define v_info(format, arg...) \
> +	netdev_info(adapter->netdev, format, ## arg)
> +#define v_warn(format, arg...) \
> +	netdev_warn(adapter->netdev, format, ## arg)

Relies on an 'adapter' local varable?? Ugly.

Jason