netdev - Re: [PATCH for bnxt_re V4 13/21] RDMA/bnxt

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Date:   Wed, 18 Jan 2017 11:16:41 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Selvin Xavier <selvin.xavier@...adcom.com>
Cc:     dledford@...hat.com, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, michael.chan@...adcom.com,
        Eddie Wai <eddie.wai@...adcom.com>,
        Devesh Sharma <devesh.sharma@...adcom.com>,
        Somnath Kotur <somnath.kotur@...adcom.com>,
        Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
Subject: Re: [PATCH for bnxt_re V4 13/21] RDMA/bnxt_re: Support QP verbs

On Wed, Dec 21, 2016 at 03:42:02AM -0800, Selvin Xavier wrote:
> This patch implements create_qp, destroy_qp, query_qp and modify_qp verbs.
>
> v2: Fixed sparse warnings
> v3: Splits __filter_modify_flags function to avoid nested switch cases.
>     Removes unwanted macros. Also, fix the endianness related issues
>     reported by sparse.
>
> Signed-off-by: Eddie Wai <eddie.wai@...adcom.com>
> Signed-off-by: Devesh Sharma <devesh.sharma@...adcom.com>
> Signed-off-by: Somnath Kotur <somnath.kotur@...adcom.com>
> Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
> Signed-off-by: Selvin Xavier <selvin.xavier@...adcom.com>
> ---

<snip>

> +
> +static u8 __from_ib_qp_type(enum ib_qp_type type)
> +{
> +	switch (type) {
> +	case IB_QPT_GSI:
> +		return CMDQ_CREATE_QP1_TYPE_GSI;
> +	case IB_QPT_RC:
> +		return CMDQ_CREATE_QP_TYPE_RC;
> +	case IB_QPT_UD:
> +		return CMDQ_CREATE_QP_TYPE_UD;
> +	case IB_QPT_RAW_ETHERTYPE:
> +		return CMDQ_CREATE_QP_TYPE_RAW_ETHERTYPE;
> +	default:
> +		return IB_QPT_MAX;
> +	}
> +}
> +

<snip>

> +static u8 __from_ib_qp_state(enum ib_qp_state state)
> +{
> +	switch (state) {
> +	case IB_QPS_RESET:
> +		return CMDQ_MODIFY_QP_NEW_STATE_RESET;
> +	case IB_QPS_INIT:
> +		return CMDQ_MODIFY_QP_NEW_STATE_INIT;
> +	case IB_QPS_RTR:
> +		return CMDQ_MODIFY_QP_NEW_STATE_RTR;
> +	case IB_QPS_RTS:
> +		return CMDQ_MODIFY_QP_NEW_STATE_RTS;
> +	case IB_QPS_SQD:
> +		return CMDQ_MODIFY_QP_NEW_STATE_SQD;
> +	case IB_QPS_SQE:
> +		return CMDQ_MODIFY_QP_NEW_STATE_SQE;
> +	case IB_QPS_ERR:
> +	default:
> +		return CMDQ_MODIFY_QP_NEW_STATE_ERR;
> +	}
> +}
> +
> +static enum ib_qp_state __to_ib_qp_state(u8 state)
> +{
> +	switch (state) {
> +	case CMDQ_MODIFY_QP_NEW_STATE_RESET:
> +		return IB_QPS_RESET;
> +	case CMDQ_MODIFY_QP_NEW_STATE_INIT:
> +		return IB_QPS_INIT;
> +	case CMDQ_MODIFY_QP_NEW_STATE_RTR:
> +		return IB_QPS_RTR;
> +	case CMDQ_MODIFY_QP_NEW_STATE_RTS:
> +		return IB_QPS_RTS;
> +	case CMDQ_MODIFY_QP_NEW_STATE_SQD:
> +		return IB_QPS_SQD;
> +	case CMDQ_MODIFY_QP_NEW_STATE_SQE:
> +		return IB_QPS_SQE;
> +	case CMDQ_MODIFY_QP_NEW_STATE_ERR:
> +	default:
> +		return IB_QPS_ERR;
> +	}
> +}
> +
> +static u32 __from_ib_mtu(enum ib_mtu mtu)
> +{
> +	switch (mtu) {
> +	case IB_MTU_256:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_256;
> +	case IB_MTU_512:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_512;
> +	case IB_MTU_1024:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_1024;
> +	case IB_MTU_2048:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
> +	case IB_MTU_4096:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_4096;
> +	default:
> +		return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
> +	}
> +}
> +
> +static enum ib_mtu __to_ib_mtu(u32 mtu)
> +{
> +	switch (mtu & CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) {
> +	case CMDQ_MODIFY_QP_PATH_MTU_MTU_256:
> +		return IB_MTU_256;
> +	case CMDQ_MODIFY_QP_PATH_MTU_MTU_512:
> +		return IB_MTU_512;
> +	case CMDQ_MODIFY_QP_PATH_MTU_MTU_1024:
> +		return IB_MTU_1024;
> +	case CMDQ_MODIFY_QP_PATH_MTU_MTU_2048:
> +		return IB_MTU_2048;
> +	case CMDQ_MODIFY_QP_PATH_MTU_MTU_4096:
> +		return IB_MTU_4096;
> +	default:
> +		return IB_MTU_2048;
> +	}
> +}

Why do you you need these functions? These translations to<->from look
redundant.

Thanks

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