linux-kernel - Re: [PATCH 10/20] [SCSI] mpt3sas: Add branding string support for OEM's HBA

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Message-ID: <20150615115358.GB10429@c203.arch.suse.de>
Date:	Mon, 15 Jun 2015 13:53:58 +0200
From:	Johannes Thumshirn <jthumshirn@...e.de>
To:	Sreekanth Reddy <sreekanth.reddy@...gotech.com>
Cc:	"jejb@...nel.org" <jejb@...nel.org>,
	Christoph Hellwig <hch@...radead.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Sathya Prakash <Sathya.Prakash@...gotech.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/20] [SCSI] mpt3sas: Add branding string support for
 OEM's HBA

On Mon, Jun 15, 2015 at 04:41:56PM +0530, Sreekanth Reddy wrote:
> On Mon, Jun 15, 2015 at 3:16 PM, Johannes Thumshirn <jthumshirn@...e.de> wrote:
> > On Fri, Jun 12, 2015 at 03:12:22PM +0530, Sreekanth Reddy wrote:
> >> Added the following Dell branding to the mpt3sas driver.
> >>
> >> "VendorID"   "DeviceID"  "SubsystemVendor ID"  "SubsystemDevice ID"  Dell Branding String
> >> 0x1000        0x0097          0x1028                 0x1F46            DELL 12Gbps HBA
> >>
> >> Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@...gotech.com>
> >> ---
> >>  drivers/scsi/mpt3sas/mpt3sas_base.c | 36 ++++++++++++++++++++++++++++++++++++
> >>  drivers/scsi/mpt3sas/mpt3sas_base.h | 11 +++++++++++
> >>  2 files changed, 47 insertions(+)
> >>
> >> diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
> >> index 6739c0a..db362cb 100644
> >> --- a/drivers/scsi/mpt3sas/mpt3sas_base.c
> >> +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
> >> @@ -2345,6 +2345,41 @@ _base_display_intel_branding(struct MPT3SAS_ADAPTER *ioc)
> >>
> >>
> >>  /**
> >> + * _base_display_dell_branding - Display branding string
> >> + * @ioc: per adapter object
> >> + *
> >> + * Return nothing.
> >> + */
> >> +static void
> >> +_base_display_dell_branding(struct MPT3SAS_ADAPTER *ioc)
> >> +{
> >> +     if (ioc->pdev->subsystem_vendor != PCI_VENDOR_ID_DELL)
> >> +             return;
> >> +
> >> +     switch (ioc->pdev->device) {
> >> +     case MPI25_MFGPAGE_DEVID_SAS3008:
> >> +             switch (ioc->pdev->subsystem_device) {
> >> +             case MPT3SAS_DELL_12G_HBA_SSDID:
> >> +                     pr_info(MPT3SAS_FMT "%s\n", ioc->name,
> >> +                             MPT3SAS_DELL_12G_HBA_BRANDING);
> >> +                     break;
> >> +             default:
> >> +                     pr_info(MPT3SAS_FMT
> >> +                        "Dell 12Gbps HBA: Subsystem ID: 0x%X\n", ioc->name,
> >> +                        ioc->pdev->subsystem_device);
> >> +                     break;
> >> +             }
> >> +             break;
> >> +     default:
> >> +             pr_info(MPT3SAS_FMT
> >> +                     "Dell 12Gbps HBA: Subsystem ID: 0x%X\n", ioc->name,
> >> +                     ioc->pdev->subsystem_device);
> >> +             break;
> >> +     }
> >> +}
> >> +
> >> +
> >> +/**
> >>   * _base_display_ioc_capabilities - Disply IOC's capabilities.
> >>   * @ioc: per adapter object
> >>   *
> >> @@ -2374,6 +2409,7 @@ _base_display_ioc_capabilities(struct MPT3SAS_ADAPTER *ioc)
> >>           bios_version & 0x000000FF);
> >>
> >>       _base_display_intel_branding(ioc);
> >> +     _base_display_dell_branding(ioc);
> >>
> >>       pr_info(MPT3SAS_FMT "Protocol=(", ioc->name);
> >>
> >> diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
> >> index 2318ef8..c4780c7 100644
> >> --- a/drivers/scsi/mpt3sas/mpt3sas_base.h
> >> +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
> >> @@ -152,6 +152,17 @@
> >>  #define MPT3SAS_INTEL_RS3UC080_SSDID    0x3524
> >>
> >>  /*
> >> + * Dell HBA branding
> >> + */
> >> +#define MPT3SAS_DELL_12G_HBA_BRANDING       \
> >> +     "Dell 12Gbps HBA"
> >> +
> >> +/*
> >> + * Dell HBA SSDIDs
> >> + */
> >> +#define MPT3SAS_DELL_12G_HBA_SSDID   0x1F46
> >> +
> >> +/*
> >>   * status bits for ioc->diag_buffer_status
> >>   */
> >>  #define MPT3_DIAG_BUFFER_IS_REGISTERED       (0x01)
> >> --
> >> 2.0.2
> >>
> >> --
> >> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> >> the body of a message to majordomo@...r.kernel.org
> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
> > This might be something you might consider re-organizing for your code-base
> > merge as well, as it leads to a lot of code duplication the more OEMs you have.
> 
> May I know which hunk of this patch may leads to code duplication for
> more OEMs we add? Whether declaring individual function for each OEMs
> leads to this code duplication.

Hi Sreekanth,

In
[PATCH 11/20] [SCSI] mpt3sas: Add branding string support for OEM custom HBA
you add _base_display_cisco_branding(). In
[PATCH 10/20] [SCSI] mpt3sas: Add branding string support for OEM's HBA
you add _base_display_dell_branding(). You already have
_base_display_intel_branding().

Each of them follows the pattern:
1) Check if it is a OEM device for XXX
2) Check witch OEM device for XXX it is
3) Display a string based on that specific OEM device
4) Return

Johannes
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