Hi to all! I am testing a PCIe Root Complex prototyping setup in which I have a USB 3.0 host as a PCI Endpoint. Running in an ARC CPU platform it works well, but when running in an emulated ARM64 (this is done by a Synopsys virtualization tool) the endpoint initialization fails as can be seen in the following log: xhci_hcd 0000:01:00.0: xHCI Host Controller xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1 xhci_hcd 0000:01:00.0: xHCI capability registers at ffffff80002c4000: xhci_hcd 0000:01:00.0: CAPLENGTH AND HCIVERSION 0x960020: xhci_hcd 0000:01:00.0: CAPLENGTH: 0x20 xhci_hcd 0000:01:00.0: HCIVERSION: 0x96 xhci_hcd 0000:01:00.0: HCSPARAMS 1: 0x4000820 xhci_hcd 0000:01:00.0: Max device slots: 32 xhci_hcd 0000:01:00.0: Max interrupters: 8 xhci_hcd 0000:01:00.0: Max ports: 4 xhci_hcd 0000:01:00.0: HCSPARAMS 2: 0x11 xhci_hcd 0000:01:00.0: Isoc scheduling threshold: 1 xhci_hcd 0000:01:00.0: Maximum allowed segments in event ring: 1 xhci_hcd 0000:01:00.0: HCSPARAMS 3 0x0: xhci_hcd 0000:01:00.0: Worst case U1 device exit latency: 0 xhci_hcd 0000:01:00.0: Worst case U2 device exit latency: 0 xhci_hcd 0000:01:00.0: HCC PARAMS 0x14042cb: xhci_hcd 0000:01:00.0: HC generates 64 bit addresses xhci_hcd 0000:01:00.0: FIXME: more HCCPARAMS debugging xhci_hcd 0000:01:00.0: RTSOFF 0x600: xhci_hcd 0000:01:00.0: xHCI operational registers at ffffff80002c4020: xhci_hcd 0000:01:00.0: USBCMD 0x0: xhci_hcd 0000:01:00.0: HC is being stopped xhci_hcd 0000:01:00.0: HC has finished hard reset xhci_hcd 0000:01:00.0: Event Interrupts disabled xhci_hcd 0000:01:00.0: Host System Error Interrupts disabled xhci_hcd 0000:01:00.0: HC has finished light reset xhci_hcd 0000:01:00.0: USBSTS 0x9: xhci_hcd 0000:01:00.0: Event ring is not empty xhci_hcd 0000:01:00.0: No Host System Error xhci_hcd 0000:01:00.0: HC is halted xhci_hcd 0000:01:00.0: ffffff80002c4420 port status reg = 0x2a0 xhci_hcd 0000:01:00.0: ffffff80002c4424 port power reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4428 port link reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c442c port reserved reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4430 port status reg = 0x2a0 xhci_hcd 0000:01:00.0: ffffff80002c4434 port power reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4438 port link reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c443c port reserved reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4440 port status reg = 0x2a0 xhci_hcd 0000:01:00.0: ffffff80002c4444 port power reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4448 port link reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c444c port reserved reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4450 port status reg = 0x2a0 xhci_hcd 0000:01:00.0: ffffff80002c4454 port power reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c4458 port link reg = 0x0 xhci_hcd 0000:01:00.0: ffffff80002c445c port reserved reg = 0x0 xhci_hcd 0000:01:00.0: // Halt the HC xhci_hcd 0000:01:00.0: Resetting HCD xhci_hcd 0000:01:00.0: // Reset the HC xhci_hcd 0000:01:00.0: Wait for controller to be ready for doorbell rings xhci_hcd 0000:01:00.0: Reset complete xhci_hcd 0000:01:00.0: Enabling 64-bit DMA addresses. xhci_hcd 0000:01:00.0: Calling HCD init xhci_hcd 0000:01:00.0: xhci_init xhci_hcd 0000:01:00.0: xHCI doesn't need link TRB QUIRK xhci_hcd 0000:01:00.0: Supported page size register = 0x1 xhci_hcd 0000:01:00.0: Supported page size of 4K xhci_hcd 0000:01:00.0: HCD page size set to 4K xhci_hcd 0000:01:00.0: // xHC can handle at most 32 device slots. xhci_hcd 0000:01:00.0: // Setting Max device slots reg = 0x20. xhci_hcd 0000:01:00.0: // Device context base array address = 0xfcafb000 (DMA), ffffff80002c7000 (virt) xhci_hcd 0000:01:00.0: Allocated command ring at ffffffc07db28cc0 xhci_hcd 0000:01:00.0: First segment DMA is 0xfc42c000 xhci_hcd 0000:01:00.0: // Setting command ring address to 0x20 xhci_hcd 0000:01:00.0: // xHC command ring deq ptr low bits + flags = @00000000 xhci_hcd 0000:01:00.0: // xHC command ring deq ptr high bits = @00000000 xhci_hcd 0000:01:00.0: // Doorbell array is located at offset 0x800 from cap regs base addr xhci_hcd 0000:01:00.0: // xHCI capability registers at ffffff80002c4000: xhci_hcd 0000:01:00.0: // @ffffff80002c4000 = 0x960020 (CAPLENGTH AND HCIVERSION) xhci_hcd 0000:01:00.0: // CAPLENGTH: 0x20 xhci_hcd 0000:01:00.0: // xHCI operational registers at ffffff80002c4020: xhci_hcd 0000:01:00.0: // @ffffff80002c4018 = 0x600 RTSOFF xhci_hcd 0000:01:00.0: // xHCI runtime registers at ffffff80002c4600: xhci_hcd 0000:01:00.0: // @ffffff80002c4014 = 0x800 DBOFF xhci_hcd 0000:01:00.0: // Doorbell array at ffffff80002c4800: xhci_hcd 0000:01:00.0: xHCI runtime registers at ffffff80002c4600: xhci_hcd 0000:01:00.0: ffffff80002c4600: Microframe index = 0x0 xhci_hcd 0000:01:00.0: // Allocating event ring xhci_hcd 0000:01:00.0: TRB math tests passed. xhci_hcd 0000:01:00.0: // Allocated event ring segment table at 0xfc42e000 xhci_hcd 0000:01:00.0: Set ERST to 0; private num segs = 1, virt addr = ffffff80002cd000, dma addr = 0xfc42e000 xhci_hcd 0000:01:00.0: // Write ERST size = 1 to ir_set 0 (some bits preserved) xhci_hcd 0000:01:00.0: // Set ERST entries to point to event ring. xhci_hcd 0000:01:00.0: // Set ERST base address for ir_set 0 = 0xfc42e000 xhci_hcd 0000:01:00.0: // Write event ring dequeue pointer, preserving EHB bit xhci_hcd 0000:01:00.0: Wrote ERST address to ir_set 0. xhci_hcd 0000:01:00.0: Allocating 0 scratchpad buffers xhci_hcd 0000:01:00.0: Ext Cap ffffff80002c4510, port offset = 1, count = 2, revision = 0x3 xhci_hcd 0000:01:00.0: Ext Cap ffffff80002c4520, port offset = 3, count = 2, revision = 0x2 xhci_hcd 0000:01:00.0: Found 2 USB 2.0 ports and 2 USB 3.0 ports. xhci_hcd 0000:01:00.0: USB 2.0 port at index 2, addr = ffffff80002c4440 xhci_hcd 0000:01:00.0: USB 2.0 port at index 3, addr = ffffff80002c4450 xhci_hcd 0000:01:00.0: USB 3.0 port at index 0, addr = ffffff80002c4420 xhci_hcd 0000:01:00.0: USB 3.0 port at index 1, addr = ffffff80002c4430 xhci_hcd 0000:01:00.0: Reading op_regs->dev_notification xhci_hcd 0000:01:00.0: Reading finished: 0 xhci_hcd 0000:01:00.0: Writting op_regs->dev_notification: 2 xhci_hcd 0000:01:00.0: Writting finished: 2 xhci_hcd 0000:01:00.0: Finished xhci_init xhci_hcd 0000:01:00.0: Called HCD init xhci_hcd 0000:01:00.0: xhci_run xhci_hcd 0000:01:00.0: Command ring memory map follows: xhci_hcd 0000:01:00.0: @00000000fc42c000 00000000 00000000 00000000 00000000 (...) xhci_hcd 0000:01:00.0: @00000000fc42c3f0 fc42c000 00000000 00000000 00001802 xhci_hcd 0000:01:00.0: Ring has not been updated xhci_hcd 0000:01:00.0: Ring deq = ffffff80002c9000 (virt), 0xfc42c000 (dma) xhci_hcd 0000:01:00.0: Ring deq updated 0 times xhci_hcd 0000:01:00.0: Ring enq = ffffff80002c9000 (virt), 0xfc42c000 (dma) xhci_hcd 0000:01:00.0: Ring enq updated 0 times xhci_hcd 0000:01:00.0: // xHC command ring deq ptr low bits + flags = @00000000 xhci_hcd 0000:01:00.0: // xHC command ring deq ptr high bits = @00000000 xhci_hcd 0000:01:00.0: ERST memory map follows: xhci_hcd 0000:01:00.0: @00000000fc42e000 fc42c400 00000000 00000040 00000000 xhci_hcd 0000:01:00.0: Event ring: xhci_hcd 0000:01:00.0: @00000000fc42c400 00000000 00000000 00000000 00000000 (...) xhci_hcd 0000:01:00.0: @00000000fc42c7f0 00000000 00000000 00000000 00000000 xhci_hcd 0000:01:00.0: Ring has not been updated xhci_hcd 0000:01:00.0: Ring deq = ffffff80002c9400 (virt), 0xfc42c400 (dma) xhci_hcd 0000:01:00.0: Ring deq updated 0 times xhci_hcd 0000:01:00.0: Ring enq = ffffff80002c9400 (virt), 0xfc42c400 (dma) xhci_hcd 0000:01:00.0: Ring enq updated 0 times xhci_hcd 0000:01:00.0: ERST deq = 64'hfc42c400 xhci_hcd 0000:01:00.0: // Set the interrupt modulation register xhci_hcd 0000:01:00.0: // Enable interrupts, cmd = 0x4. xhci_hcd 0000:01:00.0: // Enabling event ring interrupter ffffff80002c4620 by writing 0x2 to irq_pending xhci_hcd 0000:01:00.0: ffffff80002c4620: ir_set[0] xhci_hcd 0000:01:00.0: ffffff80002c4620: ir_set.pending = 0x2 xhci_hcd 0000:01:00.0: ffffff80002c4624: ir_set.control = 0xa0 xhci_hcd 0000:01:00.0: ffffff80002c4628: ir_set.erst_size = 0x1 xhci_hcd 0000:01:00.0: ffffff80002c4630: ir_set.erst_base = @fc42e000 xhci_hcd 0000:01:00.0: ffffff80002c4638: ir_set.erst_dequeue = @fc42c400 xhci_hcd 0000:01:00.0: Finished xhci_run for USB2 roothub xHCI xhci_add_endpoint called for root hub xHCI xhci_check_bandwidth called for root hub xhci_hcd 0000:01:00.0: Endpoint 0x81 ep reset callback called hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected xhci_hcd 0000:01:00.0: set port power, actual port 0 status = 0x2a0 xhci_hcd 0000:01:00.0: set port power, actual port 1 status = 0x2a0 xhci_hcd 0000:01:00.0: xHCI Host Controller xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2 xhci_hcd 0000:01:00.0: Entered xhci_run_finished xhci_hcd 0000:01:00.0: // Turn on HC, cmd = 0x5. xhci_hcd 0000:01:00.0: // xHCI operational registers (Status): 0: xhci_hcd 0000:01:00.0: // Ding dong! xhci_hcd 0000:01:00.0: Finished xhci_run for USB3 roothub xHCI xhci_add_endpoint called for root hub xHCI xhci_check_bandwidth called for root hub xhci_hcd 0000:01:00.0: Endpoint 0x81 ep reset callback called hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected xhci_hcd 0000:01:00.0: set port power, actual port 0 status = 0x2a0 xhci_hcd 0000:01:00.0: set port power, actual port 1 status = 0x2a0 xhci_hcd 0000:01:00.0: get port status, actual port 0 status = 0x2a0 xhci_hcd 0000:01:00.0: Get port status returned 0x100 xhci_hcd 0000:01:00.0: get port status, actual port 1 status = 0x2a0 xhci_hcd 0000:01:00.0: Get port status returned 0x100 xhci_hcd 0000:01:00.0: get port status, actual port 0 status = 0x2a0 xhci_hcd 0000:01:00.0: Get port status returned 0x2a0 xhci_hcd 0000:01:00.0: get port status, actual port 1 status = 0x2a0 xhci_hcd 0000:01:00.0: Get port status returned 0x2a0 xhci_hcd 0000:01:00.0: Command timeout xhci_hcd 0000:01:00.0: Abort command ring Apparently the USB 2.0 part seems ok, but the USb 3.0 part fails because of a command timeout. I have increased a lot the cmd_timer expires but nothing changed. Can anyone give me an hint? Thanks, Joao -- 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
