Scatter gather list in SCSI miniport driver
in [Device Drivers]
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From: hitesh on 1 Mar 2010 06:21 Hi All, is there any readymade function which can provide the scatter gather list in SCSI port driver. like what we have in ataport driver AtaPortGetScatterGatherList(). if it is there then let me know, if it is not then which are the minimum functions we can use to build? thanks Hitesh.
From: Scott Noone on 1 Mar 2010 12:02 ScsiPortGetPhysicalAddress is probably what you're looking for. -scott -- Scott Noone Consulting Associate OSR Open Systems Resources, Inc. http://www.osronline.com "hitesh" <hitesh.ughreja(a)gmail.com> wrote in message news:a04e3d3c-9b55-4246-9c7c-16408ecbeb75(a)l24g2000prh.googlegroups.com... > Hi All, > is there any readymade function which can provide the scatter gather > list in SCSI port driver. > like what we have in ataport driver AtaPortGetScatterGatherList(). if > it is there then let me know, > if it is not then which are the minimum functions we can use to build? > thanks > Hitesh.
From: hitesh on 2 Mar 2010 00:03 On Mar 1, 10:02 pm, "Scott Noone" <sno...(a)osr.com> wrote: > ScsiPortGetPhysicalAddress is probably what you're looking for. > > -scott > > -- > Scott Noone > Consulting Associate > OSR Open Systems Resources, Inc.http://www.osronline.com > > "hitesh" <hitesh.ughr...(a)gmail.com> wrote in message > > news:a04e3d3c-9b55-4246-9c7c-16408ecbeb75(a)l24g2000prh.googlegroups.com... > > > > > Hi All, > > is there any readymade function which can provide the scatter gather > > list in SCSI port driver. > > like what we have in ataport driver AtaPortGetScatterGatherList(). if > > it is there then let me know, > > if it is not then which are the minimum functions we can use to build? > > thanks > > Hitesh.- Hide quoted text - > > - Show quoted text - hi scott, thanks for your reply, but that is not exacly i am looking for. as i am not not clear about scsi drivers' scatter gather list also. if you check in ata driver, it has function whihc can prepare the scatter gather list and gives us complete list. but here it gives only physical address, does it mean my physical memory is contiguous? as per my understanding it is not. it is contiguous only in virtual address but not in physical address. please help me somewhat in this, thanks Hitesh
From: Maxim S. Shatskih on 2 Mar 2010 00:08 >but here it gives only physical address It iterates the SGL entry-by-entry. The SGL is created and is kept internally in SCSIPORT. -- Maxim S. Shatskih Windows DDK MVP maxim(a)storagecraft.com http://www.storagecraft.com
From: hitesh on 2 Mar 2010 01:12
On Mar 2, 10:08 am, "Maxim S. Shatskih" <ma...(a)storagecraft.com.no.spam> wrote: > >but here it gives only physical address > > It iterates the SGL entry-by-entry. The SGL is created and is kept internally in SCSIPORT. > > -- > Maxim S. Shatskih > Windows DDK MVP > ma...(a)storagecraft.comhttp://www.storagecraft.com thanks maxim, so whatever i understood is, SCSIport will send only single entry to miniport and each entry by entry i have to transfer using DMA, unlike the ATA driver it can't send all entrys at a time.? thanks Hitesh |