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Ohad Ben-Cohen bcabbccabf rpmsg: add virtio-based remote processor messaging bus 
Add a virtio-based inter-processor communication bus, which enables
kernel drivers to communicate with entities, running on remote
processors, over shared memory using a simple messaging protocol.

Every pair of AMP processors share two vrings, which are used to send
and receive the messages over shared memory.

The header of every message sent on the rpmsg bus contains src and dst
addresses, which make it possible to multiplex several rpmsg channels on
the same vring.

Every rpmsg channel is a device on this bus. When a channel is added,
and an appropriate rpmsg driver is found and probed, it is also assigned
a local rpmsg address, which is then bound to the driver's callback.

When inbound messages carry the local address of a bound driver,
its callback is invoked by the bus.

This patch provides a kernel interface only; user space interfaces
will be later exposed by kernel users of this rpmsg bus.

Designed with Brian Swetland <swetland@google.com>.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au> (virtio_ids.h)
Cc: Brian Swetland <swetland@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
2012-02-08 22:53:58 +02:00
..
configfs-spear-pcie-gadget ST SPEAr: PCIE gadget suppport 2011-03-22 17:44:10 -07:00
debugfs-ec Documentation: Add new /sys/kernel/debug/ec/* files to ABI 2010-08-03 09:49:07 -04:00
debugfs-ideapad ideapad: add debugfs support 2011-10-24 16:52:39 +02:00
debugfs-pktcdvd doc: use correct debugfs mountpoint 2009-04-13 15:04:33 -07:00
evm evm: re-release 2011-07-18 12:29:40 -04:00
ima_policy ima: rename PATH_CHECK to FILE_CHECK 2010-02-07 03:06:23 -05:00
procfs-diskstats tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
pstore pstore: Allow the user to explicitly choose a backend 2011-07-22 16:14:39 -07:00
sysfs-ata [libata] Add ATA transport class 2010-10-21 20:21:03 -04:00
sysfs-block block: Revert "[SCSI] genhd: add a new attribute "alias" in gendisk" 2011-11-10 09:03:55 +01:00
sysfs-block-zram Staging: zram: Document sysfs entries 2010-08-31 15:34:36 -07:00
sysfs-bus-bcma Documentation/ABI/: update version number references from 2.6.x to 3.x 2011-08-05 13:32:40 +02:00
sysfs-bus-css Fix common misspellings 2011-03-31 11:26:23 -03:00
sysfs-bus-i2c-devices-fsa9480 drivers/misc: add support the FSA9480 USB Switch 2011-07-25 20:57:14 -07:00
sysfs-bus-i2c-devices-hm6352 hmc6352: add driver for the HMC6352 compass 2010-08-09 20:45:10 -07:00
sysfs-bus-media [media] media: Media device 2011-03-22 04:53:09 -03:00
sysfs-bus-pci PCI/sysfs: add per pci device msi[x] irq listing (v5) 2011-12-05 10:21:44 -08:00
sysfs-bus-pci-devices-cciss cciss: add transport mode attribute to sys 2011-08-08 11:40:17 +02:00
sysfs-bus-pci-drivers-ehci_hcd USB: document ehci-hcd's "companion" sysfs attribute 2011-09-18 01:48:37 -07:00
sysfs-bus-rbd rbd: remove buggy rollback functionality 2011-12-07 10:46:19 -08:00
sysfs-bus-rpmsg rpmsg: add virtio-based remote processor messaging bus 2012-02-08 22:53:58 +02:00
sysfs-bus-umc uwb: document UWB and WUSB sysfs files 2008-09-17 16:54:35 +01:00
sysfs-bus-usb USB: Add optional match for interface class to dynamic ID facility 2011-11-15 10:18:29 -08:00
sysfs-bus-usb-devices-usbsevseg USB: Added driver for a Delcom USB 7-segment LED Display 2008-10-17 14:40:51 -07:00
sysfs-c2port Add c2 port support 2008-11-12 17:17:18 -08:00
sysfs-class [PATCH] Add kernel<->userspace ABI stability documentation 2006-06-21 12:40:47 -07:00
sysfs-class-backlight-driver-adp8870 Documentation/ABI/: update version number references from 2.6.x to 3.x 2011-08-05 13:32:40 +02:00
sysfs-class-bdi fuse: fix bdi naming conflict 2008-05-24 09:56:07 -07:00
sysfs-class-devfreq PM / devfreq: Add basic governors 2011-10-02 00:19:34 +02:00
sysfs-class-lcd video/lcd: document sysfs interface 2009-08-28 15:21:12 -04:00
sysfs-class-led Fix common misspellings 2011-03-31 11:26:23 -03:00
sysfs-class-mtd Documentation: add MTD sysfs docs 2009-05-29 15:13:04 +01:00
sysfs-class-net-batman-adv net: Add batman-adv meshing protocol 2010-12-16 13:44:24 -08:00
sysfs-class-net-mesh batman-adv: implement AP-isolation on the receiver side 2011-08-22 15:16:20 +02:00
sysfs-class-pktcdvd [PATCH] pktcdvd: cleanup 2007-02-11 10:51:28 -08:00
sysfs-class-power ds2760_battery: Document ABI change 2010-05-19 12:25:39 +04:00
sysfs-class-regulator regulator: add get_status() 2009-03-31 09:56:20 +01:00
sysfs-class-rtc-rtc0-device-rtc_calibration rtc/ab8500: add calibration attribute to AB8500 RTC 2012-01-10 16:30:52 -08:00
sysfs-class-scsi_host [SCSI] isci: Adding documentation to API change and fixup sysfs registration 2011-08-23 19:54:24 -07:00
sysfs-class-uwb_rc uwb: add basic radio manager 2008-11-19 14:46:33 +00:00
sysfs-class-uwb_rc-wusbhc USB: wusb: add wusb_phy_rate sysfs file to host controllers 2009-12-11 11:55:16 -08:00
sysfs-dev sysfs: add /sys/dev/{char,block} to lookup sysfs path by major:minor 2008-07-21 21:54:40 -07:00
sysfs-devices [PATCH] Add kernel<->userspace ABI stability documentation 2006-06-21 12:40:47 -07:00
sysfs-devices-memory Documentation: update broken web addresses. 2010-08-04 15:21:40 +02:00
sysfs-devices-mmc mmc: export eMMC4.4 enhanced area details to sysfs 2011-03-15 13:48:01 -04:00
sysfs-devices-node mm: compaction: add /sys trigger for per-node memory compaction 2010-05-25 08:06:59 -07:00
sysfs-devices-platform-_UDC_-gadget USB: gadget: storage: optional SCSI WRITE FUA bit 2010-08-10 14:35:42 -07:00
sysfs-devices-platform-docg3 Documentation: add sysfs entries for mtd docg3 chips 2012-01-09 18:12:17 +00:00
sysfs-devices-power PM: Do not create wakeup sysfs files for devices that cannot wake up 2011-03-15 00:43:14 +01:00
sysfs-devices-system-cpu Documentation, ABI: Update L3 cache index disable text 2011-05-16 11:24:30 -07:00
sysfs-devices-system-ibm-rtl IBM Real-Time "SMI Free" mode driver -v7 2010-10-21 10:10:46 -04:00
sysfs-driver-hid HID: Add HID Report Descriptor to sysfs 2011-02-17 13:23:14 +01:00
sysfs-driver-hid-logitech-lg4ff misc latin1 to utf8 conversions 2012-01-02 13:04:55 +01:00
sysfs-driver-hid-multitouch HID: multitouch: create sysfs attribute to control quirks from user-space 2011-11-23 14:50:38 +01:00
sysfs-driver-hid-picolcd HID: split picolcd's operation_mode sysfs attribute 2010-04-27 15:31:26 +02:00
sysfs-driver-hid-prodikeys HID: Prodikeys PC-MIDI HID Driver 2010-05-12 15:18:59 +02:00
sysfs-driver-hid-roccat-arvo HID: roccat: Add 'Users:' tag to sysfs documentation 2011-02-03 17:29:49 +01:00
sysfs-driver-hid-roccat-isku HID: roccat: Add support for Isku keyboard 2011-12-06 10:21:10 +01:00
sysfs-driver-hid-roccat-kone Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-roccat-koneplus HID: roccat: Add "Roccat Talk" support for koneplus 2011-06-13 12:50:40 +02:00
sysfs-driver-hid-roccat-kovaplus Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-roccat-pyra Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-driver-hid-wiimote HID: wiimote: Add extension sysfs attribute 2011-11-22 23:09:08 +01:00
sysfs-driver-samsung-laptop Platform: add Samsung Laptop platform driver 2011-03-28 06:28:12 -04:00
sysfs-driver-wacom Input: wacom - add LED support for Cintiq 24HD 2011-12-12 00:14:21 -08:00
sysfs-firmware-acpi ACPI: add /sys/firmware/acpi/interrupts/sci_not counter 2009-04-21 00:35:47 -04:00
sysfs-firmware-dmi firmware: Fix grammar in sysfs-firmware-dmi doc 2011-04-19 16:45:51 -07:00
sysfs-firmware-gsmi driver: Google EFI SMI 2011-04-29 18:09:34 -07:00
sysfs-firmware-log driver: Google Memory Console 2011-04-29 18:09:34 -07:00
sysfs-firmware-memmap Bernhard has moved 2009-02-18 15:37:56 -08:00
sysfs-firmware-sfi SFI: add sysfs interface for SFI tables. 2010-05-27 12:46:20 -04:00
sysfs-firmware-sgi_uv sysfs: document files in /sys/firmware/sgi_uv/ 2008-09-02 19:21:40 -07:00
sysfs-fs-ext4 ext4: update ext4 documentation 2011-02-21 20:16:21 -05:00
sysfs-gpio gpiolib: allow poll() on value 2009-09-23 07:39:48 -07:00
sysfs-i2c-bmp085 drivers/misc: support for the pressure sensor BMP085 from Bosch Sensortec 2010-08-09 20:45:05 -07:00
sysfs-ibft Firmware: add iSCSI iBFT Support 2008-04-19 19:10:28 -07:00
sysfs-kernel-fscaps kernel/ksysfs.c: expose file_caps_enabled in sysfs 2011-04-19 16:45:51 -07:00
sysfs-kernel-mm mm: create /sys/kernel/mm 2008-07-24 10:47:17 -07:00
sysfs-kernel-mm-cleancache mm/fs: cleancache documentation 2011-05-26 10:00:56 -06:00
sysfs-kernel-mm-hugepages hugetlb: new sysfs interface 2008-07-24 10:47:17 -07:00
sysfs-kernel-slab slub: document setting min order with debug_guardpage_minorder > 0 2012-01-12 20:13:04 -08:00
sysfs-kernel-uids Documentation: create new scheduler/ subdirectory 2008-02-07 08:42:17 -08:00
sysfs-memory-page-offline HWPOISON: Add soft page offline support 2009-12-16 12:20:00 +01:00
sysfs-module modules: sysfs - export: taint, coresize, initsize 2012-01-13 09:32:15 +10:30
sysfs-ocfs2 ocfs2: Document /sys/fs/ocfs2 2008-04-18 08:56:07 -07:00
sysfs-platform-asus-laptop Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
sysfs-platform-asus-wmi eeepc-wmi: asus generic asus-wmi.ko module 2011-03-28 06:07:20 -04:00
sysfs-platform-at91 can: at91_can: make can_id of mailbox 0 configurable 2011-01-24 14:56:37 +01:00
sysfs-platform-eeepc-laptop eeepc-laptop: set the right paths in the documentation 2010-02-28 19:30:57 +01:00
sysfs-platform-ideapad-laptop ideapad: remove sysfs node for cfg 2011-10-24 16:52:39 +02:00
sysfs-platform-kim drivers:misc: ti-st: move from rfkill to sysfs 2011-02-04 12:41:20 -08:00
sysfs-power PM / Hibernate: Add sysfs knob to control size of memory for drivers 2011-05-17 23:19:19 +02:00
sysfs-pps LinuxPPS: core support 2009-06-18 13:04:04 -07:00
sysfs-profiling profiling: dynamically enable readprofile at runtime 2008-10-16 11:21:31 -07:00
sysfs-ptp ptp: Added a brand new class driver for ptp clocks. 2011-05-23 13:01:00 -07:00
sysfs-tty tty: add 'active' sysfs attribute to tty0 and console device 2010-12-16 16:15:34 -08:00
sysfs-wusb_cbaf uwb: document UWB and WUSB sysfs files 2008-09-17 16:54:35 +01:00