Re: [PATCH v2 08/13] mpt3sas: Set NVMe device queue depth as 128

Sreekanth Reddy
2017-08-03T09:52:47Z

On Thu, Aug 3, 2017 at 12:09 PM, Hannes Reinecke <hare@suse.de> wrote:
> On 07/14/2017 03:22 PM, Suganath Prabu S wrote:
>> Sets nvme device queue depth, name and displays device capabilities
>>
>> Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
>> Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
>> ---
>> drivers/scsi/mpt3sas/mpt3sas_base.h | 2 +-
>> drivers/scsi/mpt3sas/mpt3sas_scsih.c | 40 ++++++++++++++++++++++++++++++++++
>> 2 files changed, 41 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
>> index 0a8187e..b7855c8 100644
>> --- a/drivers/scsi/mpt3sas/mpt3sas_base.h
>> +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
>> @@ -115,7 +115,7 @@
>>
>> #define MPT3SAS_RAID_MAX_SECTORS 8192
>> #define MPT3SAS_HOST_PAGE_SIZE_4K 12
>> -
>> +#define MPT3SAS_NVME_QUEUE_DEPTH 128
>> #define MPT_NAME_LENGTH 32 /* generic length of strings */
>> #define MPT_STRING_LENGTH 64
>>
>> diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> index 1dd9674..c5a131f 100644
>> --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> @@ -2290,6 +2290,7 @@ scsih_slave_configure(struct scsi_device *sdev)
>> struct MPT3SAS_DEVICE *sas_device_priv_data;
>> struct MPT3SAS_TARGET *sas_target_priv_data;
>> struct _sas_device *sas_device;
>> + struct _pcie_device *pcie_device;
>> struct _raid_device *raid_device;
>> unsigned long flags;
>> int qdepth;
>> @@ -2420,6 +2421,45 @@ scsih_slave_configure(struct scsi_device *sdev)
>> }
>> }
>>
>> + /* PCIe handling */
>> + if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_PCIE_DEVICE) {
>> + spin_lock_irqsave(&ioc->pcie_device_lock, flags);
>> + pcie_device = __mpt3sas_get_pdev_by_wwid(ioc,
>> + sas_device_priv_data->sas_target->sas_address);
>> + if (!pcie_device) {
>> + spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
>> + dfailprintk(ioc, pr_warn(MPT3SAS_FMT
>> + "failure at %s:%d/%s()!\n", ioc->name, __FILE__,
>> + __LINE__, __func__));
>> + return 1;
>> + }
>> +
>> + /*TODO-right Queue Depth?*/
>> + qdepth = MPT3SAS_NVME_QUEUE_DEPTH;
>> + ds = "NVMe";
>> + /*TODO-Add device name when defined*/
>> + sdev_printk(KERN_INFO, sdev,
>> + "%s: handle(0x%04x), wwid(0x%016llx), port(%d)\n",
>> + ds, handle, (unsigned long long)pcie_device->wwid,
>> + pcie_device->port_num);
>> + if (pcie_device->enclosure_handle != 0)
>> + sdev_printk(KERN_INFO, sdev,
>> + "%s: enclosure logical id(0x%016llx), slot(%d)\n",
>> + ds,
>> + (unsigned long long)pcie_device->enclosure_logical_id,
>> + pcie_device->slot);
>> + if (pcie_device->connector_name[0] != '\0')
>> + sdev_printk(KERN_INFO, sdev,
>> + "%s: enclosure level(0x%04x),"
>> + "connector name( %s)\n", ds,
>> + pcie_device->enclosure_level,
>> + pcie_device->connector_name);
>> + pcie_device_put(pcie_device);
>> + spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
>> + scsih_change_queue_depth(sdev, qdepth);
>> + return 0;
>> + }
>> +
>> spin_lock_irqsave(&ioc->sas_device_lock, flags);
>> sas_device = __mpt3sas_get_sdev_by_addr(ioc,
>> sas_device_priv_data->sas_target->sas_address);
>>
> Well; what are these TODOs doing here?
> If you know things are not correct, why not doing them correctly?
> If you cannot do them correctly, why?

Hannes,

These TODOs comments are added during initial development phase. We
will remove these TODO comments.

Thanks,
Sreekanth

>
> Cheers,
>
> Hannes
> --
> Dr. Hannes Reinecke Teamlead Storage & Networking
> hare@suse.de +49 911 74053 688
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