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

From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Greg KH <gregkh@linuxfoundation.org>, youling257 <youling257@gmail.com>
Cc: mathias.nyman@intel.com, william.allentx@gmail.com,
	linux-usb@vger.kernel.org, Thinh.Nguyen@synopsys.com
Subject: Re: USB 3.2 Gen 2x2 "Superspeed+20GBps" support for ASM3242
Date: Thu, 30 Dec 2021 15:49:26 +0200	[thread overview]
Message-ID: <f8fc1b81-775f-110d-9ec0-c3a873257fe5@linux.intel.com> (raw)
In-Reply-To: <Yc20WPbIad44/3rd@kroah.com>

On 30.12.2021 15.30, Greg KH wrote:
> On Thu, Dec 30, 2021 at 09:10:14PM +0800, youling257 wrote:
>> where i can find the series patch? https://patchwork.kernel.org/project/linux-usb/list/?series=427561
> 
> There is nothing at that link.
> 
> What is the lore.kernel.org link for the patch you are curious about?

That series should be in 5.13

https://lore.kernel.org/linux-usb/cover.1615432770.git.Thinh.Nguyen@synopsys.com/

> 
>> 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?
> 
> And most important, what kernel version are you using?
> 
> thanks,
> 
> greg k-h
>