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Groups > linux.kernel > #1477782 > unrolled thread
| Started by | Long Li <longli@exchange.microsoft.com> |
|---|---|
| First post | 2016-09-06 21:40 +0200 |
| Last post | 2016-09-07 20:00 +0200 |
| Articles | 3 — 3 participants |
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[PATCH 1/3] storvsc: use tagged SRB requests if supported by the device Long Li <longli@exchange.microsoft.com> - 2016-09-06 21:40 +0200
Re: [PATCH 1/3] storvsc: use tagged SRB requests if supported by the device Johannes Thumshirn <jthumshirn@suse.de> - 2016-09-07 09:50 +0200
RE: [PATCH 1/3] storvsc: use tagged SRB requests if supported by the device Long Li <longli@microsoft.com> - 2016-09-07 20:00 +0200
| From | Long Li <longli@exchange.microsoft.com> |
|---|---|
| Date | 2016-09-06 21:40 +0200 |
| Subject | [PATCH 1/3] storvsc: use tagged SRB requests if supported by the device |
| Message-ID | <seunU-6bA-15@gated-at.bofh.it> |
From: Long Li <longli@microsoft.com>
Properly set SRB flags when hosting device supports tagged queuing. This patch improves the performance on Fiber Channel disks.
---
drivers/scsi/storvsc_drv.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 8ccfc9e..a8f3e4c 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -136,6 +136,8 @@ struct hv_fc_wwn_packet {
#define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000
#define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000
+#define SP_UNTAGGED ((unsigned char) ~0)
+#define SRB_SIMPLE_TAG_REQUEST 0x20
/*
* Platform neutral description of a scsi request -
@@ -1451,6 +1453,12 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
vm_srb->win8_extension.srb_flags |=
SRB_FLAGS_DISABLE_SYNCH_TRANSFER;
+ if(scmnd->device->tagged_supported) {
+ vm_srb->win8_extension.srb_flags |= (SRB_FLAGS_QUEUE_ACTION_ENABLE | SRB_FLAGS_NO_QUEUE_FREEZE);
+ vm_srb->win8_extension.queue_tag = SP_UNTAGGED;
+ vm_srb->win8_extension.queue_action = SRB_SIMPLE_TAG_REQUEST;
+ }
+
/* Build the SRB */
switch (scmnd->sc_data_direction) {
case DMA_TO_DEVICE:
--
1.8.5.6
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| From | Johannes Thumshirn <jthumshirn@suse.de> |
|---|---|
| Date | 2016-09-07 09:50 +0200 |
| Subject | Re: [PATCH 1/3] storvsc: use tagged SRB requests if supported by the device |
| Message-ID | <seFMm-5cY-41@gated-at.bofh.it> |
| In reply to | #1477782 |
On Tue, Sep 06, 2016 at 02:25:41PM -0700, Long Li wrote:
> From: Long Li <longli@microsoft.com>
>
> Properly set SRB flags when hosting device supports tagged queuing. This patch improves the performance on Fiber Channel disks.
ENOSIGNEDOFF and please use checkpatch.pl on the patch.
>
> ---
> drivers/scsi/storvsc_drv.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index 8ccfc9e..a8f3e4c 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -136,6 +136,8 @@ struct hv_fc_wwn_packet {
> #define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000
> #define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000
>
> +#define SP_UNTAGGED ((unsigned char) ~0)
> +#define SRB_SIMPLE_TAG_REQUEST 0x20
>
> /*
> * Platform neutral description of a scsi request -
> @@ -1451,6 +1453,12 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
> vm_srb->win8_extension.srb_flags |=
> SRB_FLAGS_DISABLE_SYNCH_TRANSFER;
>
> + if(scmnd->device->tagged_supported) {
> + vm_srb->win8_extension.srb_flags |= (SRB_FLAGS_QUEUE_ACTION_ENABLE | SRB_FLAGS_NO_QUEUE_FREEZE);
> + vm_srb->win8_extension.queue_tag = SP_UNTAGGED;
> + vm_srb->win8_extension.queue_action = SRB_SIMPLE_TAG_REQUEST;
> + }
> +
> /* Build the SRB */
> switch (scmnd->sc_data_direction) {
> case DMA_TO_DEVICE:
> --
> 1.8.5.6
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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| From | Long Li <longli@microsoft.com> |
|---|---|
| Date | 2016-09-07 20:00 +0200 |
| Subject | RE: [PATCH 1/3] storvsc: use tagged SRB requests if supported by the device |
| Message-ID | <sePiG-2NZ-29@gated-at.bofh.it> |
| In reply to | #1478032 |
> -----Original Message-----
> From: Johannes Thumshirn [mailto:jthumshirn@suse.de]
> Sent: Wednesday, September 7, 2016 12:47 AM
> To: Long Li <longli@exchange.microsoft.com>
> Cc: KY Srinivasan <kys@microsoft.com>; Haiyang Zhang
> <haiyangz@microsoft.com>; James E.J. Bottomley
> <jejb@linux.vnet.ibm.com>; Martin K. Petersen
> <martin.petersen@oracle.com>; devel@linuxdriverproject.org; linux-
> scsi@vger.kernel.org; linux-kernel@vger.kernel.org; Long Li
> <longli@microsoft.com>
> Subject: Re: [PATCH 1/3] storvsc: use tagged SRB requests if supported by
> the device
>
> On Tue, Sep 06, 2016 at 02:25:41PM -0700, Long Li wrote:
> > From: Long Li <longli@microsoft.com>
> >
> > Properly set SRB flags when hosting device supports tagged queuing. This
> patch improves the performance on Fiber Channel disks.
>
> ENOSIGNEDOFF and please use checkpatch.pl on the patch.
Thanks for pointing that out. I'll re-send the patches.
>
> >
> > ---
> > drivers/scsi/storvsc_drv.c | 8 ++++++++
> > 1 file changed, 8 insertions(+)
> >
> > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> > index 8ccfc9e..a8f3e4c 100644
> > --- a/drivers/scsi/storvsc_drv.c
> > +++ b/drivers/scsi/storvsc_drv.c
> > @@ -136,6 +136,8 @@ struct hv_fc_wwn_packet {
> > #define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000
> > #define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000
> >
> > +#define SP_UNTAGGED ((unsigned char) ~0)
> > +#define SRB_SIMPLE_TAG_REQUEST 0x20
> >
> > /*
> > * Platform neutral description of a scsi request - @@ -1451,6
> > +1453,12 @@ static int storvsc_queuecommand(struct Scsi_Host *host,
> struct scsi_cmnd *scmnd)
> > vm_srb->win8_extension.srb_flags |=
> > SRB_FLAGS_DISABLE_SYNCH_TRANSFER;
> >
> > + if(scmnd->device->tagged_supported) {
> > + vm_srb->win8_extension.srb_flags |=
> (SRB_FLAGS_QUEUE_ACTION_ENABLE | SRB_FLAGS_NO_QUEUE_FREEZE);
> > + vm_srb->win8_extension.queue_tag = SP_UNTAGGED;
> > + vm_srb->win8_extension.queue_action =
> SRB_SIMPLE_TAG_REQUEST;
> > + }
> > +
> > /* Build the SRB */
> > switch (scmnd->sc_data_direction) {
> > case DMA_TO_DEVICE:
> > --
> > 1.8.5.6
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi"
> > in the body of a message to majordomo@vger.kernel.org More
> majordomo
> > info at
> > https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fvger.k
> > ernel.org%2fmajordomo-
> info.html&data=02%7c01%7clongli%40microsoft.com%
> >
> 7cdedd4c7ad4cf4955224d08d3d6f31f3d%7c72f988bf86f141af91ab2d7cd011db
> 47%
> >
> 7c1%7c0%7c636088312112339554&sdata=QvrOLvFjisQ4Nfz%2bkz1uyt7G7wh
> R7Uz7D
> > DlYMuc5VUM%3d
>
> --
> Johannes Thumshirn Storage
> jthumshirn@suse.de +49 911 74053 689
> SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
> GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG
> Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76
> 0850
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