linux-kernel - Re: [PATCH 01/13] ibmvfc: add vhost fields and defaults for MQ enablement

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Date:   Fri, 27 Nov 2020 11:45:02 -0600
From:   Brian King <brking@...ux.vnet.ibm.com>
To:     Tyrel Datwyler <tyreld@...ux.ibm.com>,
        james.bottomley@...senpartnership.com
Cc:     martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        brking@...ux.ibm.com
Subject: Re: [PATCH 01/13] ibmvfc: add vhost fields and defaults for MQ
 enablement

On 11/25/20 7:48 PM, Tyrel Datwyler wrote:
> diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
> index 9d58cfd774d3..8225bdbb127e 100644
> --- a/drivers/scsi/ibmvscsi/ibmvfc.h
> +++ b/drivers/scsi/ibmvscsi/ibmvfc.h
> @@ -41,6 +41,11 @@
>  #define IBMVFC_DEFAULT_LOG_LEVEL	2
>  #define IBMVFC_MAX_CDB_LEN		16
>  #define IBMVFC_CLS3_ERROR		0
> +#define IBMVFC_MQ			0

Given that IBMVFC_MQ is getting set to 0 here, that means mq_enabled is also
always zero, so am I correct that a lot of this code being added is not
yet capable of being executed?

> +#define IBMVFC_SCSI_CHANNELS		0

Similar comment here...

> +#define IBMVFC_SCSI_HW_QUEUES		1

I don't see any subsequent patches in this series that would ever result
in nr_hw_queues getting set to anything other than 1. Is that future work
planned or am I missing something?

> +#define IBMVFC_MIG_NO_SUB_TO_CRQ	0
> +#define IBMVFC_MIG_NO_N_TO_M		0
>  
>  /*
>   * Ensure we have resources for ERP and initialization:
> @@ -826,6 +831,10 @@ struct ibmvfc_host {
>  	int delay_init;
>  	int scan_complete;
>  	int logged_in;
> +	int mq_enabled;
> +	int using_channels;
> +	int do_enquiry;
> +	int client_scsi_channels;
>  	int aborting_passthru;
>  	int events_to_log;
>  #define IBMVFC_AE_LINKUP	0x0001
> 


-- 
Brian King
Power Linux I/O
IBM Linux Technology Center