On 9.3.2021 9.27, Thinh Nguyen wrote: > + Mathias > > Hi, > > William Allen wrote: >> I've never submitted to the mailing list before, so please excuse any >> formalities that I may not be observing. >> I would like to be able to use USB 3.2 Gen2x2 "SuperSpeed+²⁰Gbps" >> under Linux. I've tried several different kernel versions, and have >> built the kernel from the usb-next tree. All without finding proper >> functionality. >> >> I have an Ableconn PEX-UB159 USB 3.2 Gen 2x2 PCIe expansion card, with >> the ASM3242 controller. This controller appears to be the only Gen2x2 >> capable controller that exists in commercial products- so far as I've >> found. Everything appears to work, except for "SuperSpeed+²⁰Gbps" when >> I plug in a capable device. >> Here is the dmesg output as soon as I plug in a Gen2x2 WD P50 Black >> External NVMe SSD, using an appropriate SuperSpeed+²⁰Gbps certified >> cable: >> 5.11.2-arch1-1 >> -------------------- >> usb 7-2: new SuperSpeedPlus Gen 2 USB device number 3 using xhci_hcd >> usb 7-2: New USB device found, idVendor=1058, idProduct=2642, bcdDevice=10.03 >> usb 7-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1 >> usb 7-2: Product: Game Drive >> usb 7-2: Manufacturer: Western Digital >> usb 7-2: SerialNumber: 323130334431343030303736 >> scsi host11: uas >> scsi 11:0:0:0: Direct-Access WD Game Drive 1003 PQ: 0 ANSI: 6 >> scsi 11:0:0:1: Enclosure WD SES Device 1003 PQ: 0 ANSI: 6 >> sd 11:0:0:0: [sdf] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB) >> sd 11:0:0:0: [sdf] Write Protect is off >> sd 11:0:0:0: [sdf] Mode Sense: 57 00 10 00 >> sd 11:0:0:0: [sdf] Write cache: enabled, read cache: enabled, supports >> DPO and FUA >> sd 11:0:0:0: [sdf] Optimal transfer size 33553920 bytes >> sd 11:0:0:0: [sdf] Attached SCSI disk >> >> When I saw commits referring to Gen2x2 in the usb-next repo, I built >> off that, and also ran linux-next-git.r0.gabaf6f60176f-1 from AUR, >> both giving me the same results/output: >> linux-next-git.r0.gabaf6f60176f-1 >> ---------------------------------------------- >> usb 5-1: new SuperSpeed Gen 1x2 USB device number 3 using xhci_hcd >> usb 5-1: New USB device found, idVendor=1058, idProduct=2642, bcdDevice=10.03 >> usb 5-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 >> usb 5-1: Product: Game Drive >> usb 5-1: Manufacturer: Western Digital >> usb 5-1: SerialNumber: 323130334431343030303736 >> scsi host7: uas >> scsi 7:0:0:0: Direct-Access WD Game Drive 1003 PQ: 0 ANSI: 6 >> scsi 7:0:0:1: Enclosure WD SES Device 1003 PQ: 0 ANSI: 6 >> ses 7:0:0:1: Attached Enclosure device >> ses 7:0:0:1: Failed to get diagnostic page 0x1 >> ses 7:0:0:1: Failed to bind enclosure -19 >> sd 7:0:0:0: [sdf] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB) >> sd 7:0:0:0: [sdf] Write Protect is off >> sd 7:0:0:0: [sdf] Mode Sense: 57 00 10 00 >> sd 7:0:0:0: [sdf] Write cache: enabled, read cache: enabled, supports >> DPO and FUA >> sd 7:0:0:0: [sdf] Optimal transfer size 33553920 bytes >> sd 7:0:0:0: [sdf] Attached SCSI disk >> >> See that it's detecting it as Gen 1x2. >> The output of lsusb -t shows that it is connected at 5000M using the >> uas driver. Even my much slower USB 3.1 SSDs connect at 10000M on the >> exact same port. >> When I attach the Gen2x2 NVMe SSD to my other 3.2 Gen2 card, it >> connects at 10000M, so It seems to be directly related to a >> mishandling when the Gen2x2 device gets recognized by the Gen2x2 card. >> >> lspci output from 5.11.2-arch1-1: >> ------------------------------------------- >> 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 >> Physical Slot: 1 >> Flags: bus master, fast devsel, latency 0, IRQ 62, NUMA node 0 >> Memory at f7df0000 (64-bit, non-prefetchable) [size=32K] >> Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+ >> Capabilities: [68] MSI-X: Enable+ Count=8 Masked- >> Capabilities: [78] Power Management version 3 >> Capabilities: [80] Express Legacy Endpoint, MSI 00 >> Capabilities: [c0] Subsystem: ASMedia Technology Inc. Device 0201 >> Capabilities: [100] Advanced Error Reporting >> Capabilities: [200] Secondary PCI Express >> Capabilities: [300] Latency Tolerance Reporting >> Capabilities: [400] L1 PM Substates >> Kernel driver in use: xhci_hcd >> Kernel modules: xhci_pci >> >> I'm happy to test anything, or file this somewhere more appropriate if >> you could point me in the right direction. > > Currently the usb host stack doesn't really support USB 3.2 yet, at > least the speed check part. I made some updates to handle that. > > You apply these patches and test on your setup > https://patchwork.kernel.org/project/linux-usb/list/?series=427561 > > Hopefully Mathias will have time to review and Ack them for the next > release cycle. Thanks for the reminder, added some comments to the series -Mathias
