This seem to work now and needs some further hacking. This was tested with dummy_hcd on a local machine on top of target/master. HS works, SS + stream support are most likely my next steps. This is a new gadget serving the UASP and using the target framework for scsi command processing, storage etc. It is like scsi_add_host() but for the other side :) If there is anything one does not like please let me know. Here and there are a few hacks which I need to get rid of. Patch 3 is a good example :) The gadget is configured via configfs like the remaining part of the target framework. Hope you like it. Everyone who wants to give it a shot, here is a brief howto: 1. Load the required drivers & setup environment modprobe dummy_hcd modprobe target_core_mod modprobe tcm_uasp mount a -t configfs /sys/kernel/config CONFIGFS=/sys/kernel/config/; TARGET=$CONFIGFS/target/core/ FABRIC=$CONFIGFS/target/uasp/ 2. Create / setup storage. You can choose whatever target offers you. That is ramdisk, file, block device or a pure a scsi device. Here are two examples: # ramdisk with 32768 pages (~128 MiB) mkdir -p $TARGET/rd_mcp_0/ramdisk echo rd_pages=32768 > $TARGET/rd_mcp_0/ramdisk/control echo 1 > $TARGET/rd_mcp_0/ramdisk/enable # file backend with 30 MiB storage. Created on demand. mkdir -p $TARGET/fileio_0/fileio echo "fd_dev_name=/root/file.bin,fd_dev_size=31457280" > $TARGET/fileio_0/fileio/control echo 1 > $TARGET/fileio_0/fileio/enable 3. Create a new target / device with one LUN mkdir -p $FABRIC/naa.6001405c3214b06a/tpgt_1 mkdir $FABRIC/naa.6001405c3214b06a/tpgt_1/lun/lun_0 echo naa.6001405c3214b06b > $FABRIC/naa.6001405c3214b06a/tpgt_1/nexus ln -s $TARGET/rd_mcp_0/ramdisk $FABRIC/naa.6001405c3214b06a/tpgt_1/lun/lun_0/virtual_scsi_port 4. Connect the gadget Other gadgets do this from the very beginning during modprobe. I avoided it so I don't expose an "unconfigured" gadget. If this is "okay" and there is a way to detect the new LUNs later on then I think it can be dropped. echo 1 > /sys/kernel/config/target/uasp/naa.6001405c3214b06a/tpgt_1/gadget_connect 5. Look at dmesg You should see something like: | usbcore: registered new interface driver usbfs | usbcore: registered new interface driver hub | usbcore: registered new device driver usb | dummy_hcd dummy_hcd: USB Host+Gadget Emulator, driver 02 May 2005 | dummy_hcd dummy_hcd: Dummy host controller | dummy_hcd dummy_hcd: new USB bus registered, assigned bus number 1 | usb usb1: default language 0x0409 | usb usb1: udev 1, busnum 1, minor = 0 | usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 | usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 | usb usb1: Product: Dummy host controller | usb usb1: Manufacturer: Linux 3.2.0-rc4+ dummy_hcd | usb usb1: SerialNumber: dummy_hcd | usb usb1: usb_probe_device | usb usb1: configuration #1 chosen from 1 choice | usb usb1: adding 1-0:1.0 (config #1, interface 0) | hub 1-0:1.0: usb_probe_interface | hub 1-0:1.0: usb_probe_interface - got id | hub 1-0:1.0: USB hub found | hub 1-0:1.0: 1 port detected | hub 1-0:1.0: standalone hub | hub 1-0:1.0: individual port power switching | hub 1-0:1.0: global over-current protection | hub 1-0:1.0: Single TT | hub 1-0:1.0: TT requires at most 8 FS bit times (666 ns) | hub 1-0:1.0: power on to power good time: 0ms | hub 1-0:1.0: local power source is good | hub 1-0:1.0: no over-current condition exists | hub 1-0:1.0: enabling power on all ports | UASP fabric module v0.1 on Linux/i686 on 3.2.0-rc4+ | UASP[0] - Set fabric -> uasp_fabric_configfs | gadget: g_uas ready | hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002 | hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s | hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101 | usb 1-1: new high-speed USB device number 2 using dummy_hcd | usb 1-1: skipped 1 descriptor after endpoint | usb 1-1: skipped 1 descriptor after endpoint | usb 1-1: skipped 1 descriptor after endpoint | usb 1-1: skipped 1 descriptor after endpoint | usb 1-1: default language 0x0409 | usb 1-1: udev 2, busnum 1, minor = 1 | usb 1-1: New USB device found, idVendor=0525, idProduct=a4a5 | usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 | usb 1-1: Product: UAS Product | usb 1-1: Manufacturer: UAS Manufactor | usb 1-1: SerialNumber: UAS Serial | usb 1-1: usb_probe_device | usb 1-1: configuration #1 chosen from 1 choice | gadget: high-speed config #1: Linux UASP Storage | usb 1-1: adding 1-1:1.0 (config #1, interface 0) | hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002 | uas 1-1:1.0: usb_probe_interface | uas 1-1:1.0: usb_probe_interface - got id | scsi0 : uas | usbcore: registered new interface driver uas | scsi 0:0:0:0: Direct-Access LIO-ORG RAMDISK-MCP 4.0 PQ: 0 ANSI: 5 | sd 0:0:0:0: [sda] 262144 512-byte logical blocks: (134 MB/128 MiB) | sd 0:0:0:0: [sda] Write Protect is off | sd 0:0:0:0: [sda] Mode Sense: 2f 00 00 00 | sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA | sda: unknown partition table | sd 0:0:0:0: [sda] Attached SCSI disk Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
