I am using SCSIPeripheralsDriverKit/IOUserSCSIPeripheralDeviceType00 to develop a Dext driver, which has only two classes: MyUserSCSIPeripheralDeviceType00 and MyUserClient, MyUserClient is responsible for receiving APP commands and passing them to MyUserSCSIPeripheralDeviceType00->UserSendCDB(), After the device is connected to the computer, the driver can match the device and start, calling MyUserSCSIPeripheralDeviceType00-->init(), MyUserSCSIPeripheralDeviceType00-->Start(), Any command sent by the APP to MyUserSCSIPeripheralDeviceType00 will return a failure: kIOReturnUnsupported (0xe00002c7), including UserSendCDB(), UserReportMediumBlockSize(), <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>IOKitPersonalities</key> <dict> <key>MySCSIDriver</key> <dict> <key>CFBundleIdentifier</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>CFBundleIdentifierKernel</key> <string>com.apple.kpi.iokit</string> <key>IOClass</key> <string>IOUserService</string> <key>IOMatchCategory</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>IOProviderClass</key> <string>IOSCSIPeripheralDeviceNub</string> <key>IOResourceMatch</key> <string>IOKit</string> <key>IOUserClass</key> <string>MyUserSCSIPeripheralDeviceType00</string> <key>IOUserServerName</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>UserClientProperties</key> <dict> <key>IOClass</key> <string>IOUserUserClient</string> <key>IOUserClass</key> <string>MyUserClient</string> </dict> <key>bConfigurationValue</key> <integer>1</integer> <key>bInterfaceNumber</key> <integer>0</integer> <key>bcdDevice</key> <integer>1</integer> <key>idProduct</key> <string>*</string> <key>idVendor</key> <integer>12345</integer> <key>Peripheral Device Type</key> <integer>0</integer> <key>IOKitDebug</key> <integer>65535</integer> </dict> </dict> </dict> </plist> This is the method that receives client calls kern_return_t MyUserSCSIPeripheralDeviceType00::HandleExternalStruct(IOUserClientMethodArguments* arguments) { kern_return_t ret = kIOReturnSuccess; SCSIType00OutParameters command; SCSIType00InParameters response; SCSI_Sense_Data sense; UInt64 fSenseAddr = (intptr_t)&sense; bzero((void *)&command, sizeof(SCSIType00OutParameters)); bzero((void *)&response, sizeof(SCSIType00InParameters)); bool test = TEST_UNIT_READY(&command, &response, fSenseAddr); // test is true ret = this->UserSendCDB(command, &response); // ret is kIOReturnUnsupported （0xe00002c7） UInt64 blockSize; kern_return_t sizeRet = this->UserReportMediumBlockSize(&blockSize); // sizeRet is kIOReturnUnsupported （0xe00002c7） }; // Not called. As per the documentation, this should be called during enumeration. kern_return_t IMPL(I4UserSCSIPeripheralDeviceType00, UserDetermineDeviceCharacteristics) { // *result = true; return kIOReturnSuccess; }

I'm currently working on developing a PCI driver using PCIDriverKit, but I'm encountering challenges, particularly with the driver's extension. I need some insights on the APIs and methods to follow the best practices in generating PCI drivers for retrieving PCI devices information and running NVMe commands on the devices.

I want to get the information of USB like, USB name, size, VID, PID, etc using DriverKit Extension but I'm facing difficulty finding such references or Sample code for the same. Please help me with the Sample code to get USB info with the help of Dext. Thanks