Hi All This patchset (or the linux-wimax GIT tree at git.kernel.org) merges the WiMAX subsystem and driver for the Intel 2400m Wireless WiMAX connection to the tree. We'd like to get it in for the 2.6.29 merge window. [read on for changelog since previous submit] [Note linux-wimax will have netdev as upstream, but there is a dependency for patches in gregkh's patches tree that forbid submitting against netdev for now -- so the base for this is said tree as of 11/19. See *2] WiMAX is a new wireless boadband technology that differs significantly from WiFi. It is also called 4G and resembles more the model of cellular phones, where you sign up for service with a provider. Your WiMAX card connects to a basestation, which is operated by a certain Network Access Provider (NAP). The NAP leases (or might be the same) connectivity to a Network Service Provider (NSP), which is your ISP. When you move around, your connectivity will be handed over from basestation to basestation in a seamless way. As in cellphones, there is the roaming case, where you could be are connecting to your service plan through other provider. WiMAX's main components have been standarized (some parts still in the process) as in a set of 802.16 standards. The WiMAX Forum's members drive the development of WiMAX features that end up in 802.16. This code is broken up in a WiMAX subsystem and a driver for the Intel 2400m Wireless WiMAX Link. To be able to fully utilize WiMAX services, you need extra pieces of device-specific user space software; for now, there is a C level API (the Common API) to use/control it, but a high level API over DBUS that should work for any device is in the works. See details further below. Support for other vendor's hardware would require a driver registering with the WiMAX stack and a user space component implementing the high level API. Changes in v5: - (Johannes Berg, Thomas Graf) Move away from using a generic netlink family per interface; address interfaces using an interface index attribute. Changes in v4: - (David Miller) Fix patch dependencies and compact them to reduce the patchset size. Changes in v3: - Implement feedback from the mailing list for the merge request (from Johaness, Thomas, Patrick and Evgeniy) - Moved all the sysfs controls and knobs to be debugfs based. - Remove kernel/user op-open and instead use the generic netlink controller. - Many improvements and optimizations on the usage of generic netlink. - Use generic netlink facilities for permission checking. - Properly use the netlink ack/nlerr instead of relying on home-grown system. - Fix a deadlock in wimax_reset(). - When i2400m reset completes ok, mark the device as active again (or the device gets confused). - Relicense linux/wimax.h as BSD (mistakenly didn't) - Add rationales on design and clarifications/fixes in the documentation. Changes in v2: - (Stephen Hemminger) don't use bitfields in struct wimax_dev - (Stephen Hemminger) don't use the interface name for the generic netlink family, as it might change on if rename. Change to use the interface index. - (David Miller) move the WiMAX stack to net/wimax - misc checkpatch fixes, kconfig cleanups. - use DEFINE_SPINLOCK Details follow: * The WiMAX kernel stack The (kernel) WiMAX stack is (as of now) very basic; it conforms a "control plane", in a similar fashion to cfg80211. We still don't know what's going to be a good abstraction layer because so far, we have only see one WiMAX device for which we could implement support. So the current abstraction layer provides a low-level WiMAX API with means for resetting, monitoring state changes, controlling rfkill and sending messages to the driver (in a driver specific format) back and forth (more on this below). The documentation in include/net/wimax.h provides more information. The functional API provided by the kernel stack is exported to user space via generic netlink. For convenience, libwimaxll, a shim library is provided in the user space package wimax-tools, but direct access and parsing of the generic protocol is possible. All the bits and pieces needed to operate from user space are declared in include/linux/wimax.h, which is marked for system-wide installation with headers_install. Implementation of drivers for other hardware using this model should be more or less straightforward. * The i2400m driver The driver for the 2400m sits below the stack, providing the back end operations to drive control (reset, rfkill, message passing) and feeding it state change information. On the other side, the 2400m driver connects to netdev, where it emulates an ethernet device (*1). The driver itself is broken in two main parts: bus-generic and bus-specific. The bus-generic (driver) speaks the device protocol and uses hooks provided by the bus-specific driver to talk to the device via whichever bus it happens to be connected through. More information about the driver can be found in drivers/net/wimax/i2400m/i2400m.h. * The high level WiMAX API (user space) This part is not implemented by the code in these patches, but available for download at http://linuxwimax.org/Download (use release 1.3 components); that implementation is specific to the Intel 2400. Other vendor's might be similar or very different. The "high level part" (scanning, connecting, disconnecting) in WiMAX is quite more complex than in other technologies such as WiFi. In general, a high level API is provided to allow for: - scanning for networks - connecting and disconnecting - controlling the radio (turn on / off) - other operations This high level API is called the Common API and is being defined by a set of participants in the WiMAX industry. It is a cross platform API, meant to be vendor neutral; as such, it is very alien to Linux's system level APIs and we are planning moving the API to D-BUS and making it look "more native", but without loosing its spirit. The implementation of this API aims to hide the user (connection managers, to be more exact) from the common complexities of WiMAX. Each vendor would implement what ever they need in user space to expose said API (could be just a passthrough if the implementation is in the driver or in the device). Most of these complexities are related to scanning. Scanning in WiMAX is expensive (power consumption wise and time wise), so it has to be done carefully, and each device will have it's most optimal way to do it. Most (all?) WiMAX operators run on regulated channels. To connect to an operator, you need to know the channels where to look and scan in there for base stations; when found, you need to know which NAPs (Network Access Providers, the infrastructure owner) they provide and then the NAPs you find have to be mapped to NSPs (Network Service Providers, the ISP). Even if you did a scan on all the channels available in a country (for example, the US channel plan) and found different base stations, all that information is still not discoverable from them (the 802.16g upcoming standard aims to fix that). So a database that helps mapping all this information (base station IDs vs NAPs vs NSPs) is needed; we call that the "provisioning" information, and getting that information is not trivial. The operators, as of now, provide it to you over the OMA-DM protocol--that requires an OMA-DM client daemon running in your machine. Another way to provision is manually, getting a provisioning file from either the operator or someone that has an OMA-DM client daemon. The problem is that, as of now, there is still no OMA-DM open source client. In http://linuxwimax.org we provide one, but Intel does not own it and it cannot be made open source. As we said above, it is optional if you go with the manual mode. Once there is a network, you can connect to it. For networks that require authentication (most), the Intel device requires a supplicant in user space--because of a set of issues we are working to resolve, it cannot be made open source yet, but it will. As of now, it is provided as a shared library that is loaded dynamically. When a network is connected, use a DHCP client to obtain an address (this is how most WiMAX networks are configured). When you connect to a network/provider with whom you don't have a service agreement, you will probably redirected to a landing page where you will be able to sign up for service (in exchange for your credit card number), much similar to some WiFi hotspots. This is known as being "activated" for said provider and you only need to do it once, as the provider will remember your MAC address. When you are up and running, your connection will be handed over from tower to tower as you move around without requiring a new connection sequence or DHCP renegotiation. Other operations provided by the "Common API" relate to obtain provisioning information from the network, contact information for the network operator, manipulating roaming modes, etc ... Caveats: - the 2400 goes into idle power saving when connected if there is no network activity. It comes out of it automatically when traffic is sent to the network. But sometimes, to come out of it the network requests a DHCP renegotiation; the user space code still has a piece of code missing for doing it, so you need to manually restart your DHCP client. *1 Previous iterations of the driver provided a Pure IP device, without Ethernet wrapping but we gave up. Most DHCP software in user space and in the network backends assume the world is Ethernet (anything that uses ISC DHCP's client and/or daemon). We ended up registering a PureIP hw type with IANA and creating patches to support it to the ISC DHCP suite (at http://linuxwimax.org/Download) and modifying dhclient, server, and friends so the hardware type PureIP was recognized and thus, when the DHCP client sent a request, it was with hwtype == purerip. However, on the server end (they shall remain nameless), many configurations are set to take only Ethernet hwtypes and when asked to take the server patches for pureip, they cringed. It's kind of understandable -- so we assume it'll take time for those patches to trickle into deployment and just moved to behave like Ethernet. The easy path. *2 To build in other trees, you will need the following patches against the USB stack. http://kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/usb/usb-change-interface-to-usb_lock_device_for_reset.patch http://kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/usb/usb-introduce-usb_queue_reset-to-do-resets-from-atomic-contexts-v7.patch 2.6.28-rc5 has been tested. Or clone git.kernel.org/pub/scm/linux/kernel/inaky/git/linux-wimax.git; note that tree will be rebased when the code is accepted into mailine. Inaky Perez-Gonzalez (29): wimax: documentation for the stack wimax: headers for kernel API and user space interaction wimax: internal API for the kernel space WiMAX stack wimax: debug macros and debug settings for the WiMAX stack wimax: generic device management (registration, deregistration, lookup) genetlink: export genl_unregister_mc_group() wimax: basic API: kernel/user messaging, rfkill and reset debugfs: add helpers for exporting a size_t simple value wimax: debugfs controls wimax: Makefile, Kconfig and docbook linkage for the stack i2400m: documentation and instructions for usage i2400m: host/device procotol and core driver definitions i2400m: Generic probe/disconnect, reset and message passing i2400m: linkage to the networking stack i2400m: firmware loading and bootrom initialization i2400m: RX and TX data/control paths i2400m: various functions for device management i2400m: debugfs controls i2400m/USB: header for the USB bus driver i2400m/USB: probe/disconnect, dev init/shutdown and reset backends i2400m/USB: firmware upload backend i2400m/USB: TX and RX path backends i2400m/SDIO: header for the SDIO subdriver i2400m/SDIO: probe/disconnect, dev init/shutdown and reset backends i2400m/SDIO: firmware upload backend i2400m/SDIO: TX and RX path backends i2400m: Makefile and Kconfig wimax: export linux/wimax.h and linux/wimax/i2400m.h with headers_install wimax/i2400m: add CREDITS and MAINTAINERS entries CREDITS | 17 + Documentation/DocBook/networking.tmpl | 8 + Documentation/wimax/README.i2400m | 260 ++++++ Documentation/wimax/README.wimax | 81 ++ MAINTAINERS | 16 + drivers/net/Kconfig | 2 + drivers/net/Makefile | 1 + drivers/net/wimax/Kconfig | 17 + drivers/net/wimax/Makefile | 2 + drivers/net/wimax/i2400m/Kconfig | 49 + drivers/net/wimax/i2400m/Makefile | 29 + drivers/net/wimax/i2400m/control.c | 1291 ++++++++++++++++++++++++++ drivers/net/wimax/i2400m/debug-levels.h | 45 + drivers/net/wimax/i2400m/debugfs.c | 385 ++++++++ drivers/net/wimax/i2400m/driver.c | 728 +++++++++++++++ drivers/net/wimax/i2400m/fw.c | 1095 ++++++++++++++++++++++ drivers/net/wimax/i2400m/i2400m-sdio.h | 132 +++ drivers/net/wimax/i2400m/i2400m-usb.h | 264 ++++++ drivers/net/wimax/i2400m/i2400m.h | 755 +++++++++++++++ drivers/net/wimax/i2400m/netdev.c | 524 +++++++++++ drivers/net/wimax/i2400m/op-rfkill.c | 207 ++++ drivers/net/wimax/i2400m/rx.c | 534 +++++++++++ drivers/net/wimax/i2400m/sdio-debug-levels.h | 22 + drivers/net/wimax/i2400m/sdio-fw.c | 224 +++++ drivers/net/wimax/i2400m/sdio-rx.c | 255 +++++ drivers/net/wimax/i2400m/sdio-tx.c | 153 +++ drivers/net/wimax/i2400m/sdio.c | 511 ++++++++++ drivers/net/wimax/i2400m/tx.c | 817 ++++++++++++++++ drivers/net/wimax/i2400m/usb-debug-levels.h | 42 + drivers/net/wimax/i2400m/usb-fw.c | 340 +++++++ drivers/net/wimax/i2400m/usb-notif.c | 263 ++++++ drivers/net/wimax/i2400m/usb-rx.c | 417 +++++++++ drivers/net/wimax/i2400m/usb-tx.c | 229 +++++ drivers/net/wimax/i2400m/usb.c | 583 ++++++++++++ fs/debugfs/file.c | 32 + include/linux/Kbuild | 2 + include/linux/debugfs.h | 2 + include/linux/wimax.h | 234 +++++ include/linux/wimax/Kbuild | 1 + include/linux/wimax/debug.h | 453 +++++++++ include/linux/wimax/i2400m.h | 512 ++++++++++ include/net/wimax.h | 520 +++++++++++ net/Kconfig | 2 + net/Makefile | 1 + net/netlink/genetlink.c | 1 + net/wimax/Kconfig | 36 + net/wimax/Makefile | 13 + net/wimax/debug-levels.h | 42 + net/wimax/debugfs.c | 90 ++ net/wimax/id-table.c | 142 +++ net/wimax/op-msg.c | 421 +++++++++ net/wimax/op-reset.c | 143 +++ net/wimax/op-rfkill.c | 535 +++++++++++ net/wimax/stack.c | 599 ++++++++++++ net/wimax/wimax-internal.h | 91 ++ 55 files changed, 14170 insertions(+), 0 deletions(-) create mode 100644 Documentation/wimax/README.i2400m create mode 100644 Documentation/wimax/README.wimax create mode 100644 drivers/net/wimax/Kconfig create mode 100644 drivers/net/wimax/Makefile create mode 100644 drivers/net/wimax/i2400m/Kconfig create mode 100644 drivers/net/wimax/i2400m/Makefile create mode 100644 drivers/net/wimax/i2400m/control.c create mode 100644 drivers/net/wimax/i2400m/debug-levels.h create mode 100644 drivers/net/wimax/i2400m/debugfs.c create mode 100644 drivers/net/wimax/i2400m/driver.c create mode 100644 drivers/net/wimax/i2400m/fw.c create mode 100644 drivers/net/wimax/i2400m/i2400m-sdio.h create mode 100644 drivers/net/wimax/i2400m/i2400m-usb.h create mode 100644 drivers/net/wimax/i2400m/i2400m.h create mode 100644 drivers/net/wimax/i2400m/netdev.c create mode 100644 drivers/net/wimax/i2400m/op-rfkill.c create mode 100644 drivers/net/wimax/i2400m/rx.c create mode 100644 drivers/net/wimax/i2400m/sdio-debug-levels.h create mode 100644 drivers/net/wimax/i2400m/sdio-fw.c create mode 100644 drivers/net/wimax/i2400m/sdio-rx.c create mode 100644 drivers/net/wimax/i2400m/sdio-tx.c create mode 100644 drivers/net/wimax/i2400m/sdio.c create mode 100644 drivers/net/wimax/i2400m/tx.c create mode 100644 drivers/net/wimax/i2400m/usb-debug-levels.h create mode 100644 drivers/net/wimax/i2400m/usb-fw.c create mode 100644 drivers/net/wimax/i2400m/usb-notif.c create mode 100644 drivers/net/wimax/i2400m/usb-rx.c create mode 100644 drivers/net/wimax/i2400m/usb-tx.c create mode 100644 drivers/net/wimax/i2400m/usb.c create mode 100644 include/linux/wimax.h create mode 100644 include/linux/wimax/Kbuild create mode 100644 include/linux/wimax/debug.h create mode 100644 include/linux/wimax/i2400m.h create mode 100644 include/net/wimax.h create mode 100644 net/wimax/Kconfig create mode 100644 net/wimax/Makefile create mode 100644 net/wimax/debug-levels.h create mode 100644 net/wimax/debugfs.c create mode 100644 net/wimax/id-table.c create mode 100644 net/wimax/op-msg.c create mode 100644 net/wimax/op-reset.c create mode 100644 net/wimax/op-rfkill.c create mode 100644 net/wimax/stack.c create mode 100644 net/wimax/wimax-internal.h
