[PATCH 0/7] remoteproc: additional virtio support

[Ohad Ben-Cohen]

The patch set focuses on extending remoteproc's virtio support: we're
putting behind the single rpmsg virtio device limitation, and allowing
firmwares to publish any number of virtio devices and of any type.

This allows us to reuse the existing virtio drivers with remote processor
backends.

For example, by publishing a virtio console device and hooking it up to the
logging mechanism of OMAP's SYS/BIOS (the RTOS which runs on the M3
subsystem), we get a fancy console with log messages coming from the M3
without writing any additional driver:

root at omap4430-panda:~# modprobe virtio_console
root at omap4430-panda:~# cat /dev/hvc0 
M3 Core0 init...
Hello from SYS/BIOS
copyTask 50: Entered...:
registering rpmsg-client-sample service on 50 with HOST
copyTask 51: Entered...:
registering rpmsg-proto service on 51 with HOST
registering rpmsg-omx service on 60 with HOST
copyTask 1: Received data: hello world!, len:12
copyTask 2: Received data: hello world!, len:12
copyTask 3: Received data: hello world!, len:12
...

Note: at this point, whether you can start using vanilla virtio drivers
with your remote processor strongly depends on your platform. E.g., there
are additional changes required for this to work on OMAP4 (mainly to
satisfy the M3's iommu requirements), and that's not upstream yet.
Other non-iommu remote processors might be able to use vanilla virtio
drivers though (probably DaVinci, for example, but this wasn't tested yet).

Cc: Brian Swetland <swetland at google.com>
Cc: Iliyan Malchev <malchev at google.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Grant Likely <grant.likely at secretlab.ca>
Cc: Rusty Russell <rusty at rustcorp.com.au>
Cc: Mark Grosen <mgrosen at ti.com>
Cc: John Williams <john.williams at petalogix.com>
Cc: Michal Simek <monstr at monstr.eu>
Cc: Loic PALLARDY <loic.pallardy at stericsson.com>
Cc: Ludovic BARRE <ludovic.barre at stericsson.com>
Cc: Omar Ramirez Luna <omar.luna at linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo at ti.com>
Cc: Anna Suman <s-anna at ti.com>
Cc: Clark Rob <rob at ti.com>
Cc: Stephen Boyd <sboyd at codeaurora.org>
Cc: Saravana Kannan <skannan at codeaurora.org>
Cc: David Brown <davidb at codeaurora.org>
Cc: Kieran Bingham <kieranbingham at gmail.com>
Cc: Tony Lindgren <tony at atomide.com>

Ohad Ben-Cohen (7):
  remoteproc: resource table overhaul
  remoteproc: remoteproc_rpmsg -> remoteproc_virtio
  remoteproc: safer boot/shutdown order
  remoteproc: remove the single rpmsg vdev limitation
  remoteproc/omap: remove the mbox_callback limitation
  remoteproc: remove the hardcoded vring alignment
  remoteproc: cleanup resource table parsing paths

 Documentation/remoteproc.txt                       |  136 +++---
 drivers/remoteproc/Makefile                        |    2 +-
 drivers/remoteproc/omap_remoteproc.c               |   11 +-
 drivers/remoteproc/remoteproc_core.c               |  524 ++++++++++++--------
 drivers/remoteproc/remoteproc_internal.h           |    6 +-
 .../{remoteproc_rpmsg.c => remoteproc_virtio.c}    |  162 +++----
 include/linux/remoteproc.h                         |  339 ++++++++++---
 7 files changed, 747 insertions(+), 433 deletions(-)
 rename drivers/remoteproc/{remoteproc_rpmsg.c => remoteproc_virtio.c} (65%)

-- 
1.7.5.4