Re: [PATCH net-next v3 6/7] vmxnet3: introduce command to register memory region

[Or Gerlitz]

On Tue, Jun 14, 2016 at 4:50 AM, Shrikrishna Khare <skhare@xxxxxxxxxx> wrote:

> +++ b/drivers/net/vmxnet3/vmxnet3_defs.h
> @@ -81,6 +81,7 @@ enum {
>         VMXNET3_CMD_RESERVED2,
>         VMXNET3_CMD_RESERVED3,
>         VMXNET3_CMD_SET_COALESCE,
> +       VMXNET3_CMD_REGISTER_MEMREGS,
>
>         VMXNET3_CMD_FIRST_GET = 0xF00D0000,
>         VMXNET3_CMD_GET_QUEUE_STATUS = VMXNET3_CMD_FIRST_GET,
> @@ -668,6 +669,22 @@ struct Vmxnet3_CoalesceScheme {
>         } coalPara;
>  };
>
> +struct Vmxnet3_MemoryRegion {
> +       __le64                                  startPA;
> +       __le32                                  length;
> +       __le16                                  txQueueBits;
> +       __le16                                  rxQueueBits;
> +};


What is the use case for this command?

What's the role of the tx/rx queue bits fields?