Re: Can not see/access devices on Marvell 88SE9485 + SiI 3726 PMP

[James Bottomley]

On Wed, 2013-07-03 at 14:52 +0200, Hajo Möller wrote:
> On 01.07.2013 16:38, James Bottomley wrote:
> > mv_sas is a libsas based driver.  libsas doesn't have any support for
> > SATA PMPs.  When it was added they were left as a todo item but then in
> > the field everyone deployed enterprise type SATA devices in SAS expander
> > chassis, so PMP support just got forgotten.
> 
> That's a pity, so it's unlikely libsas will get support for PMPs in the
> near future or at all?  Sadly I'm not able to add the support myself.
> 
> Do you know of any SAS controllers which do support SATA PMPs?
> I'm stuck with the PMPs, so I'm trying a SATA controller with an
> 88SX7042 next, although having a good SAS controller would be better in
> the long run.

No, I'm afraid not.  Libsas has been released for nearly seven years and
no-one has noticed in all that time, which means it's a really rare
thing to do.  Everyone who uses SAS controllers usually has either a
direct connection or an expander.  There's no real reason to buy
expensive kit and then plug it into a cheap port switch.  That said,
it's possible that some of the firmware SAT blob based controllers, like
the MPT ones might have PMP support ... but because of the rarity it's
likely to be buggy.

James


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Re: Can not see/access devices on Marvell 88SE9485 + SiI 3726 PMP

[Hajo Möller]

On 01.07.2013 16:38, James Bottomley wrote:
> mv_sas is a libsas based driver.  libsas doesn't have any support for
> SATA PMPs.  When it was added they were left as a todo item but then in
> the field everyone deployed enterprise type SATA devices in SAS expander
> chassis, so PMP support just got forgotten.

That's a pity, so it's unlikely libsas will get support for PMPs in the
near future or at all?  Sadly I'm not able to add the support myself.

Do you know of any SAS controllers which do support SATA PMPs?
I'm stuck with the PMPs, so I'm trying a SATA controller with an
88SX7042 next, although having a good SAS controller would be better in
the long run.

Greetings,
Hajo
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Re: Can not see/access devices on Marvell 88SE9485 + SiI 3726 PMP

[James Bottomley]

On Mon, 2013-07-01 at 16:09 +0200, Hajo Möller wrote:
> Hi,
> 
> I've got a box which recently got a Marvell 88SE9485 PCIe card
> (Supermicro AOC-SAS2LP-MV8), which is connected by a mSAS->4x SATA-cable
> to some 5 HDD backplanes (CFI-B53PM, chip is a SiI 3726).
> 
> The HBA's BIOS can see and access the HDDs through the backplanes, which
> various Linux distributions could not.
> I tried Ubuntu 12.04.2, Ubuntu 13.04, Debian 7.0 and a current Arch Linux.
> All logs in this mail are from a fresh Ubuntu 12.04.2 install.
> 
> lspci shows the controller as:
> 01:00.0 RAID bus controller: Marvell Technology Group Ltd. Device 9485
> (rev 03)
> 
> lshw does not show the attached disks, nor are there device nodes in
> /dev/ for those disks.
> 
> Unplugging a disk results in this (/var/log/kern.log):
> kernel: [  276.995910]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2062:phy 4 ctrl sts=0x.
> kernel: [  276.995914]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2064:phy 4 irq sts = 0x01201001
> kernel: [  278.950547]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2062:phy 4 ctrl sts=0x00111000.
> kernel: [  278.950551]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2064:phy 4 irq sts = 0x0081
> kernel: [  279.502757]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 838:get all reg link rate is 0x111000
> kernel: [  279.502760]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 843:get link rate is 9
> kernel: [  279.582118] mvsas :01:00.0: Phy0 : No sig fis
> kernel: [  279.582121]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2006:phy0 Attached Device
> kernel: [  283.953502]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2048:Get signature time out, reset phy 4
> kernel: [  283.953517]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2062:phy 4 ctrl sts=0x.
> kernel: [  283.953519]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2064:phy 4 irq sts = 0x1001
> kernel: [  284.449485]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2062:phy 4 ctrl sts=0x00111000.
> kernel: [  284.449488]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2064:phy 4 irq sts = 0x0081
> kernel: [  286.445635]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 838:get all reg link rate is 0x111000
> kernel: [  286.445638]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 843:get link rate is 9
> kernel: [  286.524997] mvsas :01:00.0: Phy0 : No sig fis
> kernel: [  286.525000]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2006:phy0 Attached Device
> 
> Replugging the disk:
> kernel: [  310.738784]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2062:phy 4 ctrl sts=0x00111000.
> kernel: [  310.738788]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2064:phy 4 irq sts = 0x0001
> kernel: [  310.738791]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 2113:notify plug in on phy[0]
> kernel: [  310.758632]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 838:get all reg link rate is 0x111000
> kernel: [  310.758634]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_94xx.c
> 843:get link rate is 9
> kernel: [  310.877669]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 1175:phy 4 attach dev info is 20001
> kernel: [  310.877671]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 1177:phy 4 attach sas addr is 4
> kernel: [  310.877678]
> /build/buildd/linux-lts-quantal-3.5.0/drivers/scsi/mvsas/mv_sas.c
> 277:phy 4 byte dmaded.
> kernel: [  310.877689] sas: sas_form_port: phy0 belongs to port0 already(1)!
> 
> According to Marvell's product brief the controller has "Built-in
> support for SATA Port Multipliers with FIS-based switching", which its
> BIOS seems to confirm.
> 
> The PMPs used to work when connected via a Syba SY-PEX40008 (SiI3124)
> controller, which has bugs on its own when more than three drives per
> PMP are concurrently active.
> 
> Any help is greatly appreciated,

mv_sas is a libsas based driver.  libsas doesn't have any support for
SATA PMPs.  When it was added they were left as a todo item but then in
the field everyone deployed enterprise type SATA devices in SAS expander
chassis, so PMP support just got forgotten.

James


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