Re: [net-next, 09/10] bng_en: Initialize default configuration

[Vadim Fedorenko <vadim.fedorenko@linux.dev>]

On 18/06/2025 15:47, Vikas Gupta wrote:
> Query resources from the firmware and, based on the
> availability of resources, initialize the default
> settings. The default settings include:
> 1. Rings and other resource reservations with the
> firmware. This ensures that resources are reserved
> before network and auxiliary devices are created.
> 2. Mapping the BAR, which helps access doorbells since
> its size is known after querying the firmware.
> 3. Retrieving the TCs and hardware CoS queue mappings.
> 
> Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
> Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
> Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@broadcom.com>
> ---

[...]

> diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_hwrm_lib.c b/drivers/net/ethernet/broadcom/bnge/bnge_hwrm_lib.c
> index 577ac5dcdd9b..ffdec285948e 100644
> --- a/drivers/net/ethernet/broadcom/bnge/bnge_hwrm_lib.c
> +++ b/drivers/net/ethernet/broadcom/bnge/bnge_hwrm_lib.c
> @@ -647,3 +647,57 @@ int bnge_hwrm_vnic_qcaps(struct bnge_dev *bd)
>   
>   	return rc;
>   }
> +
> +#define BNGE_CNPQ(q_profile)	\
> +		((q_profile) ==	\
> +		 QUEUE_QPORTCFG_RESP_QUEUE_ID0_SERVICE_PROFILE_LOSSY_ROCE_CNP)
> +
> +int bnge_hwrm_queue_qportcfg(struct bnge_dev *bd)
> +{
> +	struct hwrm_queue_qportcfg_output *resp;
> +	struct hwrm_queue_qportcfg_input *req;
> +	u8 i, j, *qptr;
> +	bool no_rdma;
> +	int rc = 0;

The initialization is not needed. The very next line re-assigns the
value of rc.

> +
> +	rc = hwrm_req_init(bd, req, HWRM_QUEUE_QPORTCFG);
> +	if (rc)
> +		return rc;
> +
> +	resp = hwrm_req_hold(bd, req);
> +	rc = hwrm_req_send(bd, req);
> +	if (rc)
> +		goto qportcfg_exit;
> +
> +	if (!resp->max_configurable_queues) {
> +		rc = -EINVAL;
> +		goto qportcfg_exit;
> +	}
> +	bd->max_tc = resp->max_configurable_queues;
> +	bd->max_lltc = resp->max_configurable_lossless_queues;
> +	if (bd->max_tc > BNGE_MAX_QUEUE)
> +		bd->max_tc = BNGE_MAX_QUEUE;
> +
> +	no_rdma = !bnge_is_roce_en(bd);
> +	qptr = &resp->queue_id0;
> +	for (i = 0, j = 0; i < bd->max_tc; i++) {
> +		bd->q_info[j].queue_id = *qptr;
> +		bd->q_ids[i] = *qptr++;
> +		bd->q_info[j].queue_profile = *qptr++;
> +		bd->tc_to_qidx[j] = j;
> +		if (!BNGE_CNPQ(bd->q_info[j].queue_profile) || no_rdma)
> +			j++;
> +	}
> +	bd->max_q = bd->max_tc;
> +	bd->max_tc = max_t(u8, j, 1);
> +
> +	if (resp->queue_cfg_info & QUEUE_QPORTCFG_RESP_QUEUE_CFG_INFO_ASYM_CFG)
> +		bd->max_tc = 1;
> +
> +	if (bd->max_lltc > bd->max_tc)
> +		bd->max_lltc = bd->max_tc;
> +
> +qportcfg_exit:
> +	hwrm_req_drop(bd, req);
> +	return rc;
> +}

[...]