2022-01-28 22:24:25

by Paul Menzel

Subject: [PATCH] ata: ahci: Skip 200 ms debounce delay for Marvell 88SE9235

The 200 ms delay before debouncing the PHY in `sata_link_resume()` is
not needed for the Marvell 88SE9235.

$ lspci -nn -s 0021:0e:00.0
0021:0e:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11)

So, remove it. Tested on IBM S822LC with current Linux 5.17-rc1:

Without this patch (with 200 ms delay):

[ 3.358158] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000100 irq 39
[ 3.358175] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000180 irq 39
[ 3.358191] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000200 irq 39
[ 3.358207] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000280 irq 39
[…]
[ 3.677542] ata3: SATA link down (SStatus 0 SControl 300)
[ 3.677719] ata4: SATA link down (SStatus 0 SControl 300)
[ 3.839242] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3.839828] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
[ 3.840029] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
[ 3.841796] ata2.00: configured for UDMA/133
[ 3.843231] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3.844083] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
[ 3.844313] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
[ 3.846043] ata1.00: configured for UDMA/133

With patch (no delay):

[ 3.624259] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000100 irq 39
[ 3.624436] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000180 irq 39
[ 3.624452] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000200 irq 39
[ 3.624468] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000280 irq 39
[…]
[ 3.731966] ata3: SATA link down (SStatus 0 SControl 300)
[ 3.732069] ata4: SATA link down (SStatus 0 SControl 300)
[ 3.897448] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3.897678] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3.898140] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
[ 3.898175] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
[ 3.898287] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
[ 3.898349] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
[ 3.900070] ata1.00: configured for UDMA/133
[ 3.900166] ata2.00: configured for UDMA/133

Signed-off-by: Paul Menzel <[email protected]>
---
drivers/ata/ahci.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index ab5811ef5a53..edca4e8fd44e 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -582,6 +582,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
.driver_data = board_ahci_yes_fbs },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230),
.driver_data = board_ahci_yes_fbs },
+ { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9235),
+ .driver_data = board_ahci_no_debounce_delay },
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642), /* highpoint rocketraid 642L */
.driver_data = board_ahci_yes_fbs },
{ PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0645), /* highpoint rocketraid 644L */
--
2.34.1

2022-01-28 22:24:55

by Damien Le Moal

Subject: Re: [PATCH] ata: ahci: Skip 200 ms debounce delay for Marvell 88SE9235

On 1/28/22 08:35, Paul Menzel wrote:
> The 200 ms delay before debouncing the PHY in `sata_link_resume()` is
> not needed for the Marvell 88SE9235.
>
> $ lspci -nn -s 0021:0e:00.0
> 0021:0e:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11)
>
> So, remove it. Tested on IBM S822LC with current Linux 5.17-rc1:
>
> Without this patch (with 200 ms delay):
>
> [ 3.358158] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000100 irq 39
> [ 3.358175] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000180 irq 39
> [ 3.358191] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000200 irq 39
> [ 3.358207] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000280 irq 39
> […]
> [ 3.677542] ata3: SATA link down (SStatus 0 SControl 300)
> [ 3.677719] ata4: SATA link down (SStatus 0 SControl 300)
> [ 3.839242] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
> [ 3.839828] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
> [ 3.840029] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
> [ 3.841796] ata2.00: configured for UDMA/133
> [ 3.843231] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
> [ 3.844083] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
> [ 3.844313] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
> [ 3.846043] ata1.00: configured for UDMA/133
>
> With patch (no delay):
>
> [ 3.624259] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000100 irq 39
> [ 3.624436] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000180 irq 39
> [ 3.624452] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000200 irq 39
> [ 3.624468] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000280 irq 39
> […]
> [ 3.731966] ata3: SATA link down (SStatus 0 SControl 300)
> [ 3.732069] ata4: SATA link down (SStatus 0 SControl 300)
> [ 3.897448] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
> [ 3.897678] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
> [ 3.898140] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
> [ 3.898175] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
> [ 3.898287] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
> [ 3.898349] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
> [ 3.900070] ata1.00: configured for UDMA/133
> [ 3.900166] ata2.00: configured for UDMA/133
>
> Signed-off-by: Paul Menzel <[email protected]>
> ---
> drivers/ata/ahci.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index ab5811ef5a53..edca4e8fd44e 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -582,6 +582,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
> .driver_data = board_ahci_yes_fbs },
> { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230),
> .driver_data = board_ahci_yes_fbs },
> + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9235),
> + .driver_data = board_ahci_no_debounce_delay },
> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642), /* highpoint rocketraid 642L */
> .driver_data = board_ahci_yes_fbs },
> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0645), /* highpoint rocketraid 644L */

Looks good. But for the commit message, instead of the dmesg copy-paste,
could you simply write the gains in terms of shortened scan time ? That
would make it easier to understand the benefits of the patch. Also,
there is no need for the lspci output.

--
Damien Le Moal
Western Digital Research

2022-01-30 21:25:44

by Paul Menzel

Subject: Re: [PATCH] ata: ahci: Skip 200 ms debounce delay for Marvell 88SE9235

Dear Damien,


Thank you for the quick reply.


Am 28.01.22 um 00:40 schrieb Damien Le Moal:
> On 1/28/22 08:35, Paul Menzel wrote:
>> The 200 ms delay before debouncing the PHY in `sata_link_resume()` is
>> not needed for the Marvell 88SE9235.
>>
>> $ lspci -nn -s 0021:0e:00.0
>> 0021:0e:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11)
>>
>> So, remove it. Tested on IBM S822LC with current Linux 5.17-rc1:
>>
>> Without this patch (with 200 ms delay):
>>
>> [ 3.358158] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000100 irq 39
>> [ 3.358175] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000180 irq 39
>> [ 3.358191] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000200 irq 39
>> [ 3.358207] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000280 irq 39
>> […]
>> [ 3.677542] ata3: SATA link down (SStatus 0 SControl 300)
>> [ 3.677719] ata4: SATA link down (SStatus 0 SControl 300)
>> [ 3.839242] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>> [ 3.839828] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>> [ 3.840029] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>> [ 3.841796] ata2.00: configured for UDMA/133
>> [ 3.843231] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>> [ 3.844083] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>> [ 3.844313] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>> [ 3.846043] ata1.00: configured for UDMA/133
>>
>> With patch (no delay):
>>
>> [ 3.624259] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000100 irq 39
>> [ 3.624436] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000180 irq 39
>> [ 3.624452] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000200 irq 39
>> [ 3.624468] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000280 irq 39
>> […]
>> [ 3.731966] ata3: SATA link down (SStatus 0 SControl 300)
>> [ 3.732069] ata4: SATA link down (SStatus 0 SControl 300)
>> [ 3.897448] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>> [ 3.897678] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>> [ 3.898140] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>> [ 3.898175] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>> [ 3.898287] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>> [ 3.898349] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>> [ 3.900070] ata1.00: configured for UDMA/133
>> [ 3.900166] ata2.00: configured for UDMA/133
>>
>> Signed-off-by: Paul Menzel <[email protected]>
>> ---
>> drivers/ata/ahci.c | 2 ++
>> 1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
>> index ab5811ef5a53..edca4e8fd44e 100644
>> --- a/drivers/ata/ahci.c
>> +++ b/drivers/ata/ahci.c
>> @@ -582,6 +582,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
>> .driver_data = board_ahci_yes_fbs },
>> { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230),
>> .driver_data = board_ahci_yes_fbs },
>> + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9235),
>> + .driver_data = board_ahci_no_debounce_delay },
>> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642), /* highpoint rocketraid 642L */
>> .driver_data = board_ahci_yes_fbs },
>> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0645), /* highpoint rocketraid 644L */
>
> Looks good. But for the commit message, instead of the dmesg copy-paste,
> could you simply write the gains in terms of shortened scan time ? That
> would make it easier to understand the benefits of the patch.

I can do:

> Tested on IBM S822LC with current Linux 5.17-rc1, and the 200 ms is
> gone, and the drives are still detected.
I would still like to keep the Linux logs, as then it’s clear what I
tested with (drives), and what ports were populated.

> Also, there is no need for the lspci output.

In my opinion, it prooves I used the correct PCI vendor and device
codes, and also shows the revision number of the device I tested with.


Kind regards,

Paul

2022-01-30 21:25:49

by Damien Le Moal

Subject: Re: [PATCH] ata: ahci: Skip 200 ms debounce delay for Marvell 88SE9235

On 1/28/22 18:58, Paul Menzel wrote:
> Dear Damien,
>
>
> Thank you for the quick reply.
>
>
> Am 28.01.22 um 00:40 schrieb Damien Le Moal:
>> On 1/28/22 08:35, Paul Menzel wrote:
>>> The 200 ms delay before debouncing the PHY in `sata_link_resume()` is
>>> not needed for the Marvell 88SE9235.
>>>
>>> $ lspci -nn -s 0021:0e:00.0
>>> 0021:0e:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11)
>>>
>>> So, remove it. Tested on IBM S822LC with current Linux 5.17-rc1:
>>>
>>> Without this patch (with 200 ms delay):
>>>
>>> [ 3.358158] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000100 irq 39
>>> [ 3.358175] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000180 irq 39
>>> [ 3.358191] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000200 irq 39
>>> [ 3.358207] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000280 irq 39
>>> […]
>>> [ 3.677542] ata3: SATA link down (SStatus 0 SControl 300)
>>> [ 3.677719] ata4: SATA link down (SStatus 0 SControl 300)
>>> [ 3.839242] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>>> [ 3.839828] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>>> [ 3.840029] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>>> [ 3.841796] ata2.00: configured for UDMA/133
>>> [ 3.843231] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>>> [ 3.844083] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>>> [ 3.844313] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>>> [ 3.846043] ata1.00: configured for UDMA/133
>>>
>>> With patch (no delay):
>>>
>>> [ 3.624259] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000100 irq 39
>>> [ 3.624436] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000180 irq 39
>>> [ 3.624452] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000200 irq 39
>>> [ 3.624468] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000280 irq 39
>>> […]
>>> [ 3.731966] ata3: SATA link down (SStatus 0 SControl 300)
>>> [ 3.732069] ata4: SATA link down (SStatus 0 SControl 300)
>>> [ 3.897448] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>>> [ 3.897678] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>>> [ 3.898140] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>>> [ 3.898175] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133
>>> [ 3.898287] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>>> [ 3.898349] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA
>>> [ 3.900070] ata1.00: configured for UDMA/133
>>> [ 3.900166] ata2.00: configured for UDMA/133
>>>
>>> Signed-off-by: Paul Menzel <[email protected]>
>>> ---
>>> drivers/ata/ahci.c | 2 ++
>>> 1 file changed, 2 insertions(+)
>>>
>>> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
>>> index ab5811ef5a53..edca4e8fd44e 100644
>>> --- a/drivers/ata/ahci.c
>>> +++ b/drivers/ata/ahci.c
>>> @@ -582,6 +582,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
>>> .driver_data = board_ahci_yes_fbs },
>>> { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230),
>>> .driver_data = board_ahci_yes_fbs },
>>> + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9235),
>>> + .driver_data = board_ahci_no_debounce_delay },
>>> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642), /* highpoint rocketraid 642L */
>>> .driver_data = board_ahci_yes_fbs },
>>> { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0645), /* highpoint rocketraid 644L */
>>
>> Looks good. But for the commit message, instead of the dmesg copy-paste,
>> could you simply write the gains in terms of shortened scan time ? That
>> would make it easier to understand the benefits of the patch.
>
> I can do:
>
>> Tested on IBM S822LC with current Linux 5.17-rc1, and the 200 ms is
>> gone, and the drives are still detected.
> I would still like to keep the Linux logs, as then it’s clear what I
> tested with (drives), and what ports were populated.

OK. Keep the dmesg log if you want, but add the summary. Something like:

Without this patch (with 200 ms delay): device probe takes X ms

<dmesg>

With patch (no delay): device probe takes Y ms

<dmesg>

>
>> Also, there is no need for the lspci output.
>
> In my opinion, it prooves I used the correct PCI vendor and device
> codes, and also shows the revision number of the device I tested with.

Fine.

>
>
> Kind regards,
>
> Paul


--
Damien Le Moal
Western Digital Research