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Mathias Nyman bcaa9d5c59 xhci: Create new structures to store xhci port information
Current way of having one array telling only the port speed,
and then two separate arrays with mmio addresses for usb2 and usb3 ports
requeres helper functions to transate  hw to hcd, and hcd to hw port
numbers, and is hard to expand.

Instead create a structure describing a port, including the mmio address,
the port hardware index, hcd port index, and a pointer to the roothub
it belongs to.

Create one array containing all port structures in the same order the
hardware controller sees them. Then add an array of port pointers to
each xhci hub structure pointing to the ports that belonging to the
roothub.

This way we can easily convert hw indexed port events to usb core
hcd port numbers, and vice versa usb core hub hcd port numbers
to hw index and mmio address.

Other benefit is that we can easily find the parent hcd and xhci
structure of a port structure. This is useful in debugfs where
we can give one port structure pointer as parameter and get both
the correct mmio address and xhci lock needed to set some port
parameter.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:07 +02:00
arch Merge branch 'parisc-4.17-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2018-05-20 12:44:07 -07:00
block
certs
crypto
Documentation dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller 2018-05-24 18:03:07 +02:00
drivers xhci: Create new structures to store xhci port information 2018-05-24 18:03:07 +02:00
firmware
fs for-4.17-rc5-tag 2018-05-20 12:04:27 -07:00
include usb: changes for v4.18 merge window 2018-05-24 17:46:53 +02:00
init sched/fair: Fix documentation file path 2018-05-18 09:05:28 +02:00
ipc
kernel Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-05-20 11:25:54 -07:00
lib radix tree: fix multi-order iteration race 2018-05-18 17:17:12 -07:00
LICENSES
mm mmap: relax file size limit for regular files 2018-05-19 09:29:11 -07:00
net
samples
scripts
security
sound
tools Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-05-20 11:28:32 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge 4.17-rc6 into usb-next 2018-05-21 08:27:15 +02:00
Makefile Linux 4.17-rc6 2018-05-20 15:31:38 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.