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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2017-10-05 10:21:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 11:01:57 +0200 |
| commit | 02b6fdc2a153e61b957937772a562fb6357dc861 (patch) | |
| tree | a9a1fdeb3ea45bdecbd34487d8a9a1368d4e8f1c /drivers/usb/host/Makefile | |
| parent | xhci: add port speed ID to portsc tracing (diff) | |
| download | linux-02b6fdc2a153e61b957937772a562fb6357dc861.tar.xz linux-02b6fdc2a153e61b957937772a562fb6357dc861.zip | |
usb: xhci: Add debugfs interface for xHCI driver
This adds debugfs consumer for xHCI driver. The debugfs entries
read all host registers, device/endpoint contexts, command ring,
event ring and various endpoint rings. With these entries, users
can check the registers and memory spaces used by a host during
run time, or save all the information with a simple 'cp -r' for
post-mortem programs.
The file hierarchy looks like this.
[root of debugfs]
|__usb
|____[e,u,o]hci <---------[root for other HCIs]
|____xhci <---------------[root for xHCI]
|______0000:00:14.0 <--------------[xHCI host name]
|________reg-cap <--------[capability registers]
|________reg-op <-------[operational registers]
|________reg-runtime <-----------[runtime registers]
|________reg-ext-#cap_name <----[extended capability regs]
|________command-ring <-------[root for command ring]
|__________cycle <------------------[ring cycle]
|__________dequeue <--------[ring dequeue pointer]
|__________enqueue <--------[ring enqueue pointer]
|__________trbs <-------------------[ring trbs]
|________event-ring <---------[root for event ring]
|__________cycle <------------------[ring cycle]
|__________dequeue <--------[ring dequeue pointer]
|__________enqueue <--------[ring enqueue pointer]
|__________trbs <-------------------[ring trbs]
|________devices <------------[root for devices]
|__________#slot_id <-----------[root for a device]
|____________name <-----------------[device name]
|____________slot-context <----------------[slot context]
|____________ep-context <-----------[endpoint contexts]
|____________ep#ep_index <--------[root for an endpoint]
|______________cycle <------------------[ring cycle]
|______________dequeue <--------[ring dequeue pointer]
|______________enqueue <--------[ring enqueue pointer]
|______________trbs <-------------------[ring trbs]
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/Makefile')
| -rw-r--r-- | drivers/usb/host/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index cf2691fffcc0..b2a7f058cccb 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -25,6 +25,10 @@ ifneq ($(CONFIG_USB_XHCI_RCAR), ) xhci-plat-hcd-y += xhci-rcar.o endif +ifneq ($(CONFIG_DEBUG_FS),) + xhci-hcd-y += xhci-debugfs.o +endif + obj-$(CONFIG_USB_WHCI_HCD) += whci/ obj-$(CONFIG_USB_PCI) += pci-quirks.o |