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

Hannes Reinecke
2017-08-03T06:39:54Z

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?

Cheers,

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