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Re: [Xen-devel] ehci dbgp troubles

On Wed, Jun 19, 2013 at 8:16 AM, Ben Guthro <ben@xxxxxxxxxx> wrote:
> Hi Jan,
>
> I'm hoping the troubles that I'm having are simply operator error, and
> you can help me sort the problems I'm having testing the EHCI debug
> port stuff.
>
> I finally got a hold of a USB debugger cable from here:
> http://www.semiconductorstore.com/pages/asp/supplier.asp?pl=0121
> as suggested from:
> http://www.coreboot.org/EHCI_Debug_Port#Devices.2FDongles
>
> My intent was to debug some issues on a few Ultrabooks that have been
> having some S3 related issues.
> The usb debugger cable was a prerequisite to this effort, since
> Ultrabooks do not have a serial port.
>
> However, I have been struggling to get Xen to see the device as a debug 
> console.
>
> My relevant xen command line args are:
> dbgp=ehci console=dbgp
>
> I have enabled the #define DBGP_DEBUG at the top of ehci-dbgp.c, and
> get the following output:
>
> (XEN) Found EHCI debug port on 00:1a.0
> (XEN) bar: 10 offset: 0a0
> (XEN) bar_val: e063a000
> (XEN) ehci_bar: ffff82c3ffffc000
> (XEN) dbgp: EHCI BIOS state 00000001
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 00000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) portstatus1: 00003000
> (XEN) portstatus2: 00003000
> (XEN) dbgp: ehci reset done
> (XEN)   debug control: 00000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 00000004
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: Trying to force debug port online
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000100c
> (XEN)   EHCI portsc  : 00041005
> (XEN) dbgp: ehci reset done
> (XEN)   debug control: 00000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 00000004
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) no device found in debug port
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) portstatus1: 00001803
> (XEN) portstatus2: 00001000
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) portstatus1: 00001803
> (XEN) portstatus2: 00001000
> (XEN) dbgp: ehci skip - already configured
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: Trying to force debug port online
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000100c
> (XEN)   EHCI portsc  : 00041005
> (XEN) dbgp: ehci reset done
> (XEN)   debug control: 00000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 00000004
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) no device found in debug port
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) portstatus1: 00001803
> (XEN) portstatus2: 00001000
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) portstatus1: 00001803
> (XEN) portstatus2: 00001000
> (XEN) dbgp: ehci skip - already configured
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: Trying to force debug port online
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000100c
> (XEN)   EHCI portsc  : 00041005
> (XEN) dbgp: ehci reset done
> (XEN)   debug control: 00000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080000
> (XEN)   EHCI conf flg: 00000000
> (XEN)   EHCI status  : 00001000
> (XEN)   EHCI portsc  : 00003000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 00000004
> (XEN)   EHCI portsc  : 00001000
> (XEN) dbgp: EHCI startup
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) EHCI started
> (XEN) dbgp: reset port
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) no device found in debug port
> (XEN) debug_port: 2
> (XEN) n_ports:    2
> (XEN) dbgp:
> (XEN)   debug control: 40000000
> (XEN)   EHCI cmd     : 00080001
> (XEN)   EHCI conf flg: 00000001
> (XEN)   EHCI status  : 0000000c
> (XEN)   EHCI portsc  : 00001000
> (XEN) portstatus1: 00001803
> (XEN) portstatus2: 00001000
> (XEN) ehci_dbgp_setup failed
>
> As you can see, it never seems to find the device.
> I have tried all 3 available physical ports on this machine.
>
> lspci output is:
>
> 00:00.0 Host bridge: Intel Corporation Ivy Bridge DRAM Controller (rev 09)
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, fast devsel, latency 0
>         Capabilities: [e0] Vendor Specific Information: Len=0c <?>
>
> 00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge
> Graphics Controller (rev 09) (prog-if 00 [VGA controller])
>         Subsystem: Toshiba America Info Systems Device 0004
>         Flags: bus master, fast devsel, latency 0, IRQ 74
>         Memory at e0000000 (64-bit, non-prefetchable) [size=4M]
>         Memory at d0000000 (64-bit, prefetchable) [size=256M]
>         I/O ports at 2000 [size=64]
>         Expansion ROM at <unassigned> [disabled]
>         Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>         Capabilities: [d0] Power Management version 2
>         Capabilities: [a4] PCI Advanced Features
>         Kernel driver in use: i915
>         Kernel modules: i915
>
> 00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host
> Controller (rev 04) (prog-if 30 [XHCI])
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, medium devsel, latency 0, IRQ 71
>         Memory at e0620000 (64-bit, non-prefetchable) [size=64K]
>         Capabilities: [70] Power Management version 2
>         Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
>         Kernel driver in use: xhci_hcd
>         Kernel modules: xhci-hcd
>
> 00:16.0 Communication controller: Intel Corporation Panther Point MEI
> Controller #1 (rev 04)
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, fast devsel, latency 0, IRQ 11
>         Memory at e0634000 (64-bit, non-prefetchable) [size=16]
>         Capabilities: [50] Power Management version 3
>         Capabilities: [8c] MSI: Enable- Count=1/1 Maskable- 64bit+
>
> 00:16.3 Serial controller: Intel Corporation Panther Point KT
> Controller (rev 04) (prog-if 02 [16550])
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
>         I/O ports at 20b0 [size=8]
>         Memory at e063c000 (32-bit, non-prefetchable) [size=4K]
>         Capabilities: [c8] Power Management version 3
>         Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
>         Kernel driver in use: serial
>
> 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network
> Connection (rev 04)
>         Subsystem: Toshiba America Info Systems Device 0002
>         Flags: bus master, fast devsel, latency 0, IRQ 72
>         Memory at e0600000 (32-bit, non-prefetchable) [size=128K]
>         Memory at e063b000 (32-bit, non-prefetchable) [size=4K]
>         I/O ports at 2080 [size=32]
>         Capabilities: [c8] Power Management version 2
>         Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>         Capabilities: [e0] PCI Advanced Features
>         Kernel driver in use: e1000e
>         Kernel modules: e1000e
>
> 00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced
> Host Controller #2 (rev 04) (prog-if 20 [EHCI])
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, medium devsel, latency 0, IRQ 16
>         Memory at e063a000 (32-bit, non-prefetchable) [size=1K]
>         Capabilities: [50] Power Management version 2
>         Capabilities: [58] Debug port: BAR=1 offset=00a0
>         Capabilities: [98] PCI Advanced Features
>         Kernel driver in use: ehci-pci
>         Kernel modules: ehci-pci
>
> 00:1b.0 Audio device: Intel Corporation Panther Point High Definition
> Audio Controller (rev 04)
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, fast devsel, latency 0, IRQ 78
>         Memory at e0630000 (64-bit, non-prefetchable) [size=16K]
>         Capabilities: [50] Power Management version 2
>         Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
>         Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
>         Capabilities: [100] Virtual Channel
>         Capabilities: [130] Root Complex Link
>         Kernel driver in use: snd_hda_intel
>         Kernel modules: snd-hda-intel
>
>         Memory behind bridge: e0400000-e04fffff
>         Capabilities: [40] Express Root Port (Slot+), MSI 00
>         Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
>         Capabilities: [90] Subsystem: Toshiba America Info Systems Device 0001
>         Capabilities: [a0] Power Management version 2
>         Kernel driver in use: pcieport
>         Kernel modules: shpchp
>
> 00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced
> Host Controller #1 (rev 04) (prog-if 20 [EHCI])
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, medium devsel, latency 0, IRQ 23
>         Memory at e0639000 (32-bit, non-prefetchable) [size=1K]
>         Capabilities: [50] Power Management version 2
>         Capabilities: [58] Debug port: BAR=1 offset=00a0
>         Capabilities: [98] PCI Advanced Features
>         Kernel driver in use: ehci-pci
>         Kernel modules: ehci-pci
>
> 00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, medium devsel, latency 0
>         Capabilities: [e0] Vendor Specific Information: Len=0c <?>
>
> 00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA
> Controller [AHCI mode] (rev 04) (prog-if 01 [AHCI 1.0])
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 73
>         I/O ports at 20a8 [size=8]
>         I/O ports at 20bc [size=4]
>         I/O ports at 20a0 [size=8]
>         I/O ports at 20b8 [size=4]
>         I/O ports at 2060 [size=32]
>         Memory at e0638000 (32-bit, non-prefetchable) [size=2K]
>         Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
>         Capabilities: [70] Power Management version 3
>         Capabilities: [a8] SATA HBA v1.0
>         Capabilities: [b0] PCI Advanced Features
>         Kernel driver in use: ahci
>         Kernel modules: ahci
>
> 01:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 04) (prog-if 01)
>         Subsystem: Toshiba America Info Systems Device 0001
>         Flags: bus master, fast devsel, latency 0, IRQ 11
>         Memory at e0500000 (32-bit, non-prefetchable) [size=256]
>         Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
>         Capabilities: [78] Power Management version 3
>         Capabilities: [80] Express Endpoint, MSI 00
>         Capabilities: [100] Virtual Channel
>         Capabilities: [800] Advanced Error Reporting
>
> 02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 
> 24)
>         Subsystem: Intel Corporation Centrino Advanced-N 6235 AGN
>         Flags: bus master, fast devsel, latency 0, IRQ 77
>         Memory at e0400000 (64-bit, non-prefetchable) [size=8K]
>         Capabilities: [c8] Power Management version 3
>         Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>         Capabilities: [e0] Express Endpoint, MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [140] Device Serial Number c4-85-08-ff-ff-09-07-7c
>         Kernel driver in use: iwlwifi
>         Kernel modules: iwlwifi
>
>
>
> Do you have any suggestions?

I got it to work using
dbgp=ehci@pci00:1d.0 console=dbgp

I didn't notice that there was a second EHCI debug port, in the lspci output


Sorry for the noise.

Ben

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