Re: USB 3.2 Gen 2x2 "Superspeed+20GBps" support for ASM3242

[youling 257 <youling257@gmail.com>]

2021-12-31 11:46 GMT+08:00, Thinh Nguyen <Thinh.Nguyen@synopsys.com>:
> Hi,
>
> youling 257 wrote:
>> test this patch, cat /sys/bus/usb/devices/4-1/speed, 10000
>> [   74.694284] usb 4-1: new SuperSpeed Plus Gen 2x1 USB device number
>> 2 using xhci_hcd
>> [   74.750329] usb-storage 4-1:1.0: USB Mass Storage device detected
>>
>> but speed, pcie to usb3.2 gen2x2, WRITE: bw=642MiB/s (673MB/s),
>> 642MiB/s-642MiB/s (673MB/s-673MB/s), io=1000MiB (1049MB),
>> run=1557-1557msec
>> READ: bw=467MiB/s (490MB/s), 467MiB/s-467MiB/s (490MB/s-490MB/s),
>> io=1000MiB (1049MB), run=2140-2140msec
>>
>> the mainboard usb3.2 gen2x1, WRITE: bw=838MiB/s (878MB/s),
>> 838MiB/s-838MiB/s (878MB/s-878MB/s), io=1000MiB (1049MB),
>> run=1194-1194msec
>> READ: bw=753MiB/s (790MB/s), 753MiB/s-753MiB/s (790MB/s-790MB/s),
>> io=1000MiB (1049MB), run=1328-1328msec
>>
>
> Let's avoid top-post.
>
> Some comments:
> 1) Just because the host is capable of gen2x2, it doesn't mean it will
> run at gen2x2 speed. Your device can only operate up to gen2x1 speed, so
> that's the limit. The test speed for gen2x1 above is not unreasonable.
my device can only operate up to gen2x1 10gbps speed on window, only
5gbps on linux kernel 5.16rc7.
> 2) You're comparing 2 different controllers performance. The "mainboard"
> performs better for the specific setup and specific test that you use.
> (I'm assuming that the only difference in your test setup is the host
> controller and rest is the same).
>
> 3) Find a gen2x2 capable device to test ASmedia gen2x2 speed if that's
> what you're checking for.
>
> BR,
> Thinh
>
>> 2021-12-31 9:39 GMT+08:00, Thinh Nguyen <Thinh.Nguyen@synopsys.com>:
>>> Hi,
>>>
>>> youling 257 wrote:
>>>> 2021-12-30 21:30 GMT+08:00, Greg KH <gregkh@linuxfoundation.org>:
>>>>> On Thu, Dec 30, 2021 at 09:10:14PM +0800, youling257 wrote:
>>>>>> where i can find the series patch?
>>>>>> https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-usb/list/?series=427561__;!!A4F2R9G_pg!M_zXKjO1JtIkz57qZ7BEEL7zjx2QXQTfau26hBNLX7bKEL_vOP-m8Xn1eZ14VRpY-0Ga$
>>>>>>
>>>>>
>>>>> There is nothing at that link.
>>>>>
>>>>> What is the lore.kernel.org link for the patch you are curious about?
>>>>>
>>>>>> when i used maiwo k1690(10gbps) connect to ASM3242 Controller, only
>>>>>> 500MB/s.
>>>>>> cat /sys/devices/pci0000:00/0000:00:01.3/0000:09:00.0/usb3/speed, 480
>>>>>> cat /sys/devices/pci0000:00/0000:00:01.3/0000:09:00.0/usb4/speed,
>>>>>> 20000
>>>>>> maiwo k1690 is on
>>>>>> /sys/devices/pci0000:00/0000:00:01.3/0000:09:00.0/usb4/4-1.
>>>>>> cat /sys/devices/pci0000:00/0000:00:01.3/0000:09:00.0/usb4/4-1/speed,
>>>>>> 5000
>>>>>>
>>>>>>
>>>>>> 01:00.0 USB controller: ASMedia Technology Inc. ASM3242 USB 3.2 Host
>>>>>> Controller (prog-if 30 [XHCI])
>>>>>>         Subsystem: ASMedia Technology Inc. ASM3242 USB 3.2 Host
>>>>>> Controller
>>>>>>
>>>>>> [    0.359281] xhci_hcd 0000:01:00.0: xHCI Host Controller
>>>>>> [    0.359283] xhci_hcd 0000:01:00.0: new USB bus registered,
>>>>>> assigned
>>>>>> bus
>>>>>> number 2
>>>>>> [    0.359285] xhci_hcd 0000:01:00.0: Host supports USB 3.2 Enhanced
>>>>>> SuperSpeed
>>>>>>
>>>>>> [ 1191.734123] usb 4-1: new SuperSpeed USB device number 2 using
>>>>>> xhci_hcd
>>>>>> [ 1191.794767] usb-storage 4-1:1.0: USB Mass Storage device detected
>>>>>> [ 1191.795049] scsi host9: usb-storage 4-1:1.0
>>>>>> [ 1051.051274] scsi 9:0:0:0: Direct-Access     Realtek  USB 3.2
>>>>>> Device
>>>>>> 1.00 PQ: 0 ANSI: 6
>>>>>> [ 1051.051442] sd 9:0:0:0: Attached scsi generic sg0 type 0
>>>>>> [ 1051.054461] sd 9:0:0:0: [sda] 500118192 512-byte logical blocks:
>>>>>> (256
>>>>>> GB/238 GiB)
>>>>>> [ 1051.055068] sd 9:0:0:0: [sda] Write Protect is off
>>>>>> [ 1051.055073] sd 9:0:0:0: [sda] Mode Sense: 37 00 00 08
>>>>>> [ 1051.055716] sd 9:0:0:0: [sda] Write cache: disabled, read cache:
>>>>>> enabled, doesn't support DPO or FUA
>>>>>> [ 1051.072131]  sda: sda1 sda2
>>>>>>
>>>>>> i don't have NVMe to USB 2x2 Enclosure (ASM2364 chipset), i have NVMe
>>>>>> to
>>>>>> USB 2x1 Enclosure (RTL9120B chipset), maiwo k1690, using it on
>>>>>> PciExpress
>>>>>> X4 add in card (ASM3242 chipset), it only 5Gbps speed, should be
>>>>>> 10Gbps.
>>>>>>
>>>>>
>>>>> Are you sure that your hardware can really support this?  Do you have
>>>>> the right cable and the device will support this speed?
>>>> 02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 400 Series
>>>> Chipset USB 3.1 XHCI Controller (rev 01) (prog-if 30 [XHCI])
>>>>         Subsystem: ASMedia Technology Inc. 400 Series Chipset USB 3.1
>>>> XHCI Controller
>>>>
>>>> maiwo k1690 connect to mainboard usb3.2 gen2x1 port can 10gbps.
>>>> [ 1049.965556] usb 2-2: new SuperSpeed Plus Gen 2x1 USB device number
>>>> 2 using xhci_hcd
>>>> [ 1050.028280] usb-storage 2-2:1.0: USB Mass Storage device detected
>>>> [ 1050.028560] scsi host9: usb-storage 2-2:1.0
>>>>
>>>> pcie to usb3.2 gen2x2 asm3242 should be compatible usb3.2 gen2x1.
>>>> I don't have windows os to test them, may be 5gbps on windows yet.
>>>> Is there a way to hack them to 10Gbps on linux?
>>>>
>>>>> And most important, what kernel version are you using?
>>>> kernel 5.16 rc7.
>>>>> thanks,
>>>>>
>>>>> greg k-h
>>>>>
>>>
>>> The ASmedia host controller incorrectly reports the speed ID in the
>>> port-status mismatching with its PSI capability for SSP devices. As
>>> a result, the host/hub driver will report the wrong speed.
>>>
>>> To resolve/workaround this, the xHCI driver can capture the device speed
>>> from sublink speed notification of a SSP device. All SSP devices must
>>> send sublink speed device notification, so this method should resolve
>>> your issue.
>>>
>