Commit Graph

583 Commits

Author SHA1 Message Date
Sjur Brændeland
92b38f8514 remoteproc: support virtio config space.
Support virtio configuration space and device status. The virtio
device can now access the resource table in shared memory.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[rebase and style changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-07 14:06:17 +03:00
Ohad Ben-Cohen
a2b950ac7b remoteproc: perserve resource table data
Copy resource table from first to second firmware loading.
After firmware is loaded to memory, update the vdevs resource
pointer to the resource table kept in device memory.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[rebase, terminology and style changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-07 14:06:07 +03:00
Sjur Brændeland
ba7290e016 remoteproc: calculate max_notifyid by counting vrings
Simplify handling of max_notifyid by simply counting the
number of vrings.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[small terminology changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-07 14:04:25 +03:00
Sjur Brændeland
232fcdbb45 remoteproc: code cleanup of resource parsing
Combine the almost identical functions rproc_handle_virtio_rsc
and rproc_handle_boot_rsc.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[small terminology and style changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:50:07 +03:00
Sjur Brændeland
e4b5141481 remoteproc: parse STE-firmware and find resource table address
Parse the STE firmware and scan the TOC-table to find the address
of the loaded resource table.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[rebase patch; update terminology]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:50:00 +03:00
Sjur Brændeland
95f9578163 remoteproc: add find_loaded_rsc_table firmware ops
Add function find_loaded_rsc_table to firmware ops. This function
returns the location of the resource table in shared memory
after loading.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[align function name with existing terminology, update commit log]
[document new function, rebase patch, small cleanups]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:49:52 +03:00
Sjur Brændeland
f665b2cd3f remoteproc: refactor rproc_elf_find_rsc_table()
Refactor rproc_elf_find_rsc_table() and split out the scanning
for the section header named resource table. This is done to
prepare for loading firmware once.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[small function name change to make the code easier to read]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:49:44 +03:00
Sjur Brændeland
cde42e076c remoteproc: fix error path of handle_vdev
Remove the vdev entry from the list before freeing it,
otherwise rproc->vdevs will explode.

Cc: stable@vger.kernel.org
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[edit subject, minor commit log edit, cc stable]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:47:57 +03:00
Dmitry Tarnyagin
1cd425b660 remoteproc/ste: fix memory leak on shutdown
Fixes coherent memory leakage, caused by non-deallocated
firmware image chunk.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-by: Ido Yariv <ido@wizery.com>
[slightly edit subject and commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:47:49 +03:00
Suman Anna
b39599b7cb remoteproc: fix the error check for idr_alloc
The new idr_alloc interface returns the allocated id back
on success, so fix the error path to check for negative
values. This was missed out in the newer idr interface
adoption patch, 15fc611 "remoteproc: convert to idr_alloc()".

Signed-off-by: Suman Anna <s-anna@ti.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-04-05 08:47:38 +03:00
Tejun Heo
15fc61106a remoteproc: convert to idr_alloc()
Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:18 -08:00
Tejun Heo
045dc40d9e remoteproc: don't use idr_remove_all()
idr_destroy() can destroy idr by itself and idr_remove_all() is being
deprecated.  Drop its usage.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:13 -08:00
Linus Torvalds
3c834b6f41 All trivial, thanks to the stuff which didn't quite make it time.
Cheers,
 Rusty.
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Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio updates from Rusty Russell:
 "All trivial, thanks to the stuff which didn't quite make it time"

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  virtio_console: Initialize guest_connected=true for rproc_serial
  virtio: use module_virtio_driver.
  virtio: Add module driver macro for virtio drivers.
  virtio_console: Use virtio device index to generate port name
  virtio: make pci_device_id const
  virtio: make config_ops const
  virtio-mmio: fix wrong comment about register offset
  virtio_console: Let unconnected rproc device receive data.
2013-02-26 14:49:12 -08:00
Linus Torvalds
3298a3511f arm-soc: multiplatform support
Converting more ARM platforms to multiplatform support. This time, OMAP
 gets converted, which is a major step since this is by far the largest
 platform in terms of code size. The same thing happens to the vt8500
 platform.
 
 Conflicts include:
 * Two mach/uncompress.h files are removed, the changes made to them
   elsewhere can be discarded now.
 * Moving the OMAP4 irq_match array has context clashes with turning
   omap4_sar_ram_init into an omap_early_initcall()
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Merge tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC multiplatform support from Arnd Bergmann:
 "Converting more ARM platforms to multiplatform support.  This time,
  OMAP gets converted, which is a major step since this is by far the
  largest platform in terms of code size.  The same thing happens to the
  vt8500 platform."

* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  net: cwdavinci_cpdma: export symbols for cpsw
  remoteproc: omap: depend on OMAP_MBOX_FWK
  [media] davinci: do not include mach/hardware.h
  ARM: OMAP2+: Make sure files with omap initcalls include soc.h
  ARM: OMAP2+: Include soc.h to drm.c to fix compiling
  ARM: OMAP2+: Fix warning for hwspinlock omap_postcore_initcall
  ARM: multi_v7_defconfig: add ARCH_ZYNQ
  ARM: multi_v7_defconfig: remove unnecessary CONFIG_GPIOLIB
  arm: vt8500: Remove remaining mach includes
  arm: vt8500: Convert debug-macro.S to be multiplatform friendly
  arm: vt8500: Remove single platform Kconfig options
  ARM: OMAP2+: Remove now obsolete uncompress.h and debug-macro.S
  ARM: OMAP2+: Add minimal support for booting vexpress
  ARM: OMAP2+: Enable ARCH_MULTIPLATFORM support
  ARM: OMAP2+: Disable code that currently does not work with multiplaform
  ARM: OMAP2+: Add multiplatform debug_ll support
  ARM: OMAP: Fix dmaengine init for multiplatform
  ARM: OMAP: Fix i2c cmdline initcall for multiplatform
  ARM: OMAP2+: Use omap initcalls
  ARM: OMAP2+: Limit omap initcalls to omap only on multiplatform kernels
2013-02-21 15:20:41 -08:00
Arnd Bergmann
0bef6c933f remoteproc: omap: depend on OMAP_MBOX_FWK
Patch a62a6e98 "ARM: OMAP2+: Disable code that currently does not work
with multiplaform" makes the OMAP_MBOX_FWK option depend on !MULTIPLATFORM,
which means we cannot simply select that symbol from OMAP_REMOTEPROC.

Turning the 'select' into 'depends on' ensures that all dependencies
are correct until OMAP_MBOX_FWK loses its dependency.

Without this patch, building allmodconfig results in:

drivers/remoteproc/omap_remoteproc.c:31:26: fatal error: plat/mailbox.h: No such file or directory

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
2013-02-15 13:16:11 +01:00
Stephen Hemminger
9350393239 virtio: make config_ops const
It is just a table of function pointers, make it const for cleanliness and security
reasons.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2013-02-11 15:32:17 +10:30
Kees Cook
eb367cb620 drivers/remoteproc: remove depends on CONFIG_EXPERIMENTAL
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

CC: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-21 14:52:44 -08:00
Greg Kroah-Hartman
0fe763c570 Drivers: misc: remove __dev* attributes.
CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-03 15:57:16 -08:00
Linus Torvalds
a2013a13e6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial branch from Jiri Kosina:
 "Usual stuff -- comment/printk typo fixes, documentation updates, dead
  code elimination."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  HOWTO: fix double words typo
  x86 mtrr: fix comment typo in mtrr_bp_init
  propagate name change to comments in kernel source
  doc: Update the name of profiling based on sysfs
  treewide: Fix typos in various drivers
  treewide: Fix typos in various Kconfig
  wireless: mwifiex: Fix typo in wireless/mwifiex driver
  messages: i2o: Fix typo in messages/i2o
  scripts/kernel-doc: check that non-void fcts describe their return value
  Kernel-doc: Convention: Use a "Return" section to describe return values
  radeon: Fix typo and copy/paste error in comments
  doc: Remove unnecessary declarations from Documentation/accounting/getdelays.c
  various: Fix spelling of "asynchronous" in comments.
  Fix misspellings of "whether" in comments.
  eisa: Fix spelling of "asynchronous".
  various: Fix spelling of "registered" in comments.
  doc: fix quite a few typos within Documentation
  target: iscsi: fix comment typos in target/iscsi drivers
  treewide: fix typo of "suport" in various comments and Kconfig
  treewide: fix typo of "suppport" in various comments
  ...
2012-12-13 12:00:02 -08:00
Masanari Iida
9c7682075e treewide: Fix typos in various drivers
Fix typos in printk within various drivers.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-12-03 11:05:04 +01:00
Ohad Ben-Cohen
dab55bbafd remoteproc: fix error path of ->find_vqs
Eliminate an erroneous invocation of rproc_shutdown inside
the error path of rproc_virtio_find_vqs.

Reported-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-11-29 10:05:09 +02:00
Linus Torvalds
dc92b1f9ab Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio changes from Rusty Russell:
 "New workflow: same git trees pulled by linux-next get sent straight to
  Linus.  Git is awkward at shuffling patches compared with quilt or mq,
  but that doesn't happen often once things get into my -next branch."

* 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (24 commits)
  lguest: fix occasional crash in example launcher.
  virtio-blk: Disable callback in virtblk_done()
  virtio_mmio: Don't attempt to create empty virtqueues
  virtio_mmio: fix off by one error allocating queue
  drivers/virtio/virtio_pci.c: fix error return code
  virtio: don't crash when device is buggy
  virtio: remove CONFIG_VIRTIO_RING
  virtio: add help to CONFIG_VIRTIO option.
  virtio: support reserved vqs
  virtio: introduce an API to set affinity for a virtqueue
  virtio-ring: move queue_index to vring_virtqueue
  virtio_balloon: not EXPERIMENTAL any more.
  virtio-balloon: dependency fix
  virtio-blk: fix NULL checking in virtblk_alloc_req()
  virtio-blk: Add REQ_FLUSH and REQ_FUA support to bio path
  virtio-blk: Add bio-based IO path for virtio-blk
  virtio: console: fix error handling in init() function
  tools: Fix pthread flag for Makefile of trace-agent used by virtio-trace
  tools: Add guest trace agent as a user tool
  virtio/console: Allocate scatterlist according to the current pipe size
  ...
2012-10-07 21:04:56 +09:00
Linus Torvalds
4d6d367232 - Remoteproc Recovery - by Fernando Guzman Lugo - when a remote processor
crash is detected, this mechanism will remove all virtio children
   devices, wait until their drivers let go, hard reset the remote
   processor and reload the firmware (resulting in the relevant virtio
   children devices re-added). Essentially the entire software stack
   is reset, together with the relevant hardware, so users don't have
   to reset the entire phone.
 - STE Modem driver is added - by Sjur Brændeland
 - OMAP DSP boot address support is added - by Juan Gutierrez
 - A handful of fixes/cleanups - Sjur Brændeland, Dan Carpenter, Emil Goode
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Merge tag 'remoteproc-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc

Pull remoteproc update from Ohad Ben-Cohen:

 - Remoteproc Recovery - by Fernando Guzman Lugo

   When a remote processor crash is detected, this mechanism will remove
   all virtio children devices, wait until their drivers let go, hard
   reset the remote processor and reload the firmware (resulting in the
   relevant virtio children devices re-added).  Essentially the entire
   software stack is reset, together with the relevant hardware, so
   users don't have to reset the entire phone.

 - STE Modem driver is added - by Sjur Brændeland

 - OMAP DSP boot address support is added - by Juan Gutierrez

 - A handful of fixes/cleanups - Sjur Brændeland, Dan Carpenter, Emil
   Goode

* tag 'remoteproc-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
  remoteproc: Fix use of format specifyer
  remoteproc: fix a potential NULL-dereference on cleanup
  remoteproc: select VIRTIO to avoid build breakage
  remoteproc: return -EFAULT on copy_from_user failure
  remoteproc: snprintf() can return more than was printed
  remoteproc: Add STE modem driver
  remtoteproc: maintain max notifyid
  remoteproc: create a 'recovery' debugfs entry
  remoteproc: add actual recovery implementation
  remoteproc: add rproc_report_crash function to notify rproc crashes
  remoteproc: Add dependency to HAS_DMA
  remoteproc/omap: set bootaddr support
2012-10-04 09:11:57 -07:00
Emil Goode
d09f53a735 remoteproc: Fix use of format specifyer
The dma_addr_t type can be either u32 or u64 depending on
the configuration. We should use a format specifyer for the
larger type and explicitly cast to it.

Sparse warnings:
drivers/remoteproc/remoteproc_core.c:234:2: warning:
	format ‘%x’ expects argument of type ‘unsigned int’,
	but argument 6 has type ‘dma_addr_t’ [-Wformat]

drivers/remoteproc/remoteproc_core.c:596:2: warning:
	format ‘%x’ expects argument of type ‘unsigned int’,
	but argument 5 has type ‘dma_addr_t’ [-Wformat]

drivers/remoteproc/remoteproc_core.c:634:3:
	warning: format ‘%x’ expects argument of type ‘unsigned int’,
	but argument 5 has type ‘dma_addr_t’ [-Wformat]

Signed-off-by: Emil Goode <emilgoode@gmail.com>
[fix commit log typos]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-10-02 10:14:43 +02:00
Dan Carpenter
7168d914a7 remoteproc: fix a potential NULL-dereference on cleanup
We only need to allocate mapping if there is an IOMMU domain.

Otherwise, when the mappings are released, the assumption that
an IOMMU domain is there will crash and burn.

CC: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[ohad: revise commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-10-02 09:57:28 +02:00
Ohad Ben-Cohen
2ed6d29c72 remoteproc: select VIRTIO to avoid build breakage
drivers/built-in.o: In function `rproc_virtio_finalize_features':
remoteproc_virtio.c:(.text+0x2f9a02): undefined reference to `vring_transport_features'
drivers/built-in.o: In function `rproc_virtio_del_vqs':
remoteproc_virtio.c:(.text+0x2f9a74): undefined reference to `vring_del_virtqueue'
drivers/built-in.o: In function `rproc_virtio_find_vqs':
remoteproc_virtio.c:(.text+0x2f9c44): undefined reference to `vring_new_virtqueue'
drivers/built-in.o: In function `rproc_add_virtio_dev':
(.text+0x2f9e2c): undefined reference to `register_virtio_device'
drivers/built-in.o: In function `rproc_vq_interrupt':
(.text+0x2f9db7): undefined reference to `vring_interrupt'
drivers/built-in.o: In function `rproc_remove_virtio_dev':
(.text+0x2f9e9f): undefined reference to `unregister_virtio_device'

Cc: stable@vger.kernel.org
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-10-02 09:57:14 +02:00
Dan Carpenter
bec109a430 remoteproc: return -EFAULT on copy_from_user failure
copy_from_user() returns the number of bytes remaining to be copied, but
we want to return an error code here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-30 11:44:53 +02:00
Dan Carpenter
ae768d5fac remoteproc: snprintf() can return more than was printed
snprintf() returns the number of characters which would have been
printed if there were enough space.  For example, on the first print if
we fill up the 28 character string then it would return a number more
than 30.  Use scnprintf() instead because that returns the actual number
of characters printed.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-30 11:41:48 +02:00
Michael S. Tsirkin
6457f126c8 virtio: support reserved vqs
virtio network device multiqueue support reserves
vq 3 for future use (useful both for future extensions and to make it
pretty - this way receive vqs have even and transmit - odd numbers).
Make it possible to skip initialization for
specific vq numbers by specifying NULL for name.
Document this usage as well as (existing) NULL callback.

Drivers using this not coded up yet, so I simply tested
with virtio-pci and verified that this patch does
not break existing drivers.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-28 15:05:15 +09:30
Jason Wang
17bb6d4088 virtio-ring: move queue_index to vring_virtqueue
Instead of storing the queue index in transport-specific virtio structs,
this patch moves them to vring_virtqueue and introduces an helper to get
the value.  This lets drivers simplify their management and tracing of
virtqueues.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-28 15:05:15 +09:30
Sjur Brændeland
ec4d02d918 remoteproc: Add STE modem driver
Add support for the STE modem shared memory driver.
This driver hooks into the remoteproc framework
in order to manage configuration and the virtio
devices.

This driver adds custom firmware handlers, because
STE modem uses a custom firmware layout.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
cc: Linus Walleij <linus.walleij@linaro.org>
cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
[ohad: validate mdev->ops, move setup() to probe/remove, trivial style changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-22 16:35:13 +03:00
Arnd Bergmann
2203747c97 ARM: omap: move platform_data definitions
Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the omap include directories

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: "Benoît Cousson" <b-cousson@ti.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Jarkko Nikula <jarkko.nikula@bitmer.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Jean Pihet <j-pihet@ti.com>
Cc: J Keerthy <j-keerthy@ti.com>
Cc: linux-omap@vger.kernel.org
2012-09-19 17:39:52 +02:00
Sjur Brændeland
099a3f33c8 remtoteproc: maintain max notifyid
Some of the rproc drivers (STE modem specifically) needs to know
the range of the notification IDs used for notifying the device.

Maintain a variable in struct rproc holding the largest allocated
notification id, so low-level rproc drivers could access it.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[ohad: rebase, slightly edit commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-18 21:55:52 +03:00
Fernando Guzman Lugo
2e37abb89a remoteproc: create a 'recovery' debugfs entry
Add a 'recovery' debugfs entry to dynamically disable/enable recovery
at runtime. This is useful when one is trying to debug an rproc crash;
without it, a recovery will immediately take place, making it harder
to debug the crash.

Contributions from Subramaniam Chanderashekarapuram.

Examples:

- disabling recovery:
$ echo disabled > <debugfs>/remoteproc/remoteproc0/recovery

- in case you want to recover a crash, but keep recovery disabled
  (useful in debugging sessions when you expect additional crashes
   you want to debug):
$ echo recover > <debugfs>/remoteproc/remoteproc0/recovery

- enabling recovery:
$ echo enabled > <debugfs>/remoteproc/remoteproc0/recovery

Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
[ohad: some white space, commentary and commit log changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-18 12:53:41 +03:00
Fernando Guzman Lugo
70b85ef83c remoteproc: add actual recovery implementation
Add rproc_trigger_recovery() which takes care of the recovery itself,
by removing, and re-adding, all of the remoteproc's virtio devices.

This resets all virtio users of the remote processor, during which
the remote processor is powered off and on again.

Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
[ohad: introduce rproc_add_virtio_devices to avoid 1.copying code 2.anomaly]
[ohad: some white space, naming and commit log changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-18 12:53:33 +03:00
Fernando Guzman Lugo
8afd519c34 remoteproc: add rproc_report_crash function to notify rproc crashes
Allow low-level remoteproc drivers to report rproc crashes by exporting
a new rproc_report_crash() function (invoking this from non-rproc drivers
is probably wrong, and should be carefully scrutinized if ever needed).

rproc_report_crash() can be called from any context; it offloads the
tasks of handling the crash to a separate thread.

Handling the crash from a separate thread is helpful because:
- Ability to call invoke rproc_report_crash() from atomic context, due to
  the fact that many crashes trigger an interrupt, so this function can be
  called directly from ISR context.
- Avoiding deadlocks which could happen if rproc_report_crash() is called
  from a function which indirectly holds the rproc lock.

Handling the crash might involve:
- Remoteproc register dump
- Remoteproc stack dump
- Remoteproc core dump
- Saving Remoteproc traces so they can be read after the crash
- Reseting the remoteproc in order to make it functional again (hard recovery)

Right now, we only print the crash type which was detected, and only the
mmufault type is supported. Remoteproc low-level drivers can add more types
when needed.

Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
[ohad: some commentary, white space and commit log changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-18 12:53:22 +03:00
Sjur Brændeland
a1a7e0a33a remoteproc: Add dependency to HAS_DMA
Remoteproc relies on HAS_DMA, add this dependency in Kconfig.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-18 07:05:06 +03:00
Juan Gutierrez
4980f465d2 remoteproc/omap: set bootaddr support
Some remote processors (like OMAP4's DSP) require we explicitly
set a boot address from which they'd start executing code when
taken out of reset.

Support for this is now being added to the omap-specific remoteproc
driver through a set_bootaddr function in the platform data which,
if needed, must be set according to the backend remote processor.

For OMAP4's dsp we can use the following control function:

  .set_bootaddr  = omap_ctrl_write_dsp_boot_addr

Signed-off-by: Juan Gutierrez <jgutierrez@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
[ohad: slight changes to the commit log]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-09-11 15:24:14 +03:00
Linus Torvalds
a9197f903f A batch of remoteproc patches for 3.6:
- custom binary format support from Sjur Brændeland
 - groundwork for recovery and runtime pm support
 - some cleanups and API simplifications
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Merge tag 'remoteproc-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc

Pull remoteproc update from Ohad Ben-Cohen:
 - custom binary format support from Sjur Brændeland
 - groundwork for recovery and runtime pm support
 - some cleanups and API simplifications

Fix up conflicts in drivers/remoteproc/remoteproc_core.c due to clashes
with earlier cleanups by Sjur Brændeland (with part of the cleanups
moved into the new remoteproc_elf_loader.c file).

* tag 'remoteproc-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
  MAINTAINERS: add remoteproc's git
  remoteproc: Support custom firmware handlers
  remoteproc: Move Elf related functions to separate file
  remoteproc: Add function rproc_get_boot_addr
  remoteproc: Pass struct fw to load_segments and find_rsc_table.
  remoteproc: adopt the driver core's alloc/add/del/put naming
  remoteproc: remove the get_by_name/put API
  remoteproc: support non-iommu carveout assignment
  remoteproc: simplify unregister/free interfaces
  remoteproc: remove the now-redundant kref
  remoteproc: maintain a generic child device for each rproc
  remoteproc: allocate vrings on demand, free when not needed
2012-07-26 16:19:08 -07:00
Sjur Brændeland
4afc89d66c remoteproc: Support custom firmware handlers
Firmware handling is made customizable.
This is done by creating a separate ops structure for the
firmware functions that depends on a particular firmware
format (such as ELF). The ELF functions are default used
unless the HW driver explicitly injects another firmware
handler by updating rproc->fw_ops.
The function rproc_da_to_va() is exported, as custom
firmware handlers may need to use this function.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[ohad: namespace fixes, whitespace fixes, style fixes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-15 11:39:01 +03:00
Sjur Brændeland
72854fb042 remoteproc: Move Elf related functions to separate file
Prepare for introduction of custom firmware loaders by
moving all ELF related handling into a separate file.

The functions: rproc_find_rsc_table(), rproc_fw_sanity_check(),
rproc_find_rsc_table() and rproc_get_boot_addr() are moved
to the new file remoteproc_elf_loader.c. The function
rproc_da_to_va() is made non-static and is declared in
remoteproc_internal.h

No functional changes are introduced in this patch.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[ohad: rebase, fix kerneldoc, put prototypes in remoteproc_internal.h]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-15 11:25:27 +03:00
Sjur Brændeland
3e5f9eb5d9 remoteproc: Add function rproc_get_boot_addr
Prepare for introduction of custom firmware loaders by
moving the function operating on ELF data-structures into
separate functions. Move lookup of the boot_addr in the
ELF binary to the function rproc_get_boot_addr().

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[rproc_get_boot_addr's kerneldoc: add missing @rproc line]
[rproc_get_boot_addr's kerneldoc: minor style changes]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-15 11:14:45 +03:00
Sjur Brændeland
bd48498487 remoteproc: Pass struct fw to load_segments and find_rsc_table.
Prepare for introduction of custom firmware loaders by changing
the functions rproc_find_rcs_table() and rproc_load_segments()
to use struct firmware as parameter.

When the custom loader framework is introduced all calls into
the firmware specific function must use struct firmware as
parameter.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-15 11:14:26 +03:00
Ohad Ben-Cohen
160e7c840f remoteproc: adopt the driver core's alloc/add/del/put naming
To make remoteproc's API more intuitive for developers, we adopt
the driver core's naming, i.e. alloc -> add -> del -> put. We'll also
add register/unregister when their first user shows up.

Otherwise - there's no functional change here.

Suggested by Russell King <linux@arm.linux.org.uk>.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Cc: Sjur Brændeland <sjur.brandeland@stericsson.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:27 +03:00
Ohad Ben-Cohen
40e575b1d0 remoteproc: remove the get_by_name/put API
Remove rproc_get_by_name() and rproc_put(), and the associated
remoteproc infrastructure that supports it (i.e. klist and friends),
because:

1. No one uses them
2. Using them is highly discouraged, and any potential user
   will be deeply scrutinized and encouraged to move.

If a user, that absolutely can't live with the direct boot/shutdown
model, does show up one day, then bringing this functionality back
is going to be trivial.

At this point though, keeping this functionality around is way too
much of a maintenance burden.

Cc: Sjur Brændeland <sjur.brandeland@stericsson.com>
Cc: Loic Pallardy <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Cc: Suman Anna <s-anna@ti.com>
Cc: Mark Grosen <mgrosen@ti.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:27 +03:00
Ohad Ben-Cohen
0e49b72c8c remoteproc: support non-iommu carveout assignment
Publish carveout addresses on non-iommu setups too.

Reported-and-acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:26 +03:00
Ohad Ben-Cohen
c6b5a27628 remoteproc: simplify unregister/free interfaces
Simplify the unregister/free interfaces, and make them easier
to understand and use, by moving to a symmetric and consistent
alloc() -> register() -> unregister() -> free() flow.

To create and register an rproc instance, one needed to invoke
rproc_alloc() followed by rproc_register().

To unregister and free an rproc instance, one now needs to invoke
rproc_unregister() followed by rproc_free().

Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:25 +03:00
Ohad Ben-Cohen
7183a2a799 remoteproc: remove the now-redundant kref
Now that every rproc instance contains a device, we don't need a
kref anymore to maintain the refcount of the rproc instances:
that's what device are good with!

This patch removes the now-redundant kref, and switches to
{get, put}_device instead of kref_{get, put}.

We also don't need the kref's release function anymore, and instead,
we just utilize the class's release handler (which is now responsible
for all memory de-allocations).

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:25 +03:00
Ohad Ben-Cohen
b5ab5e24e9 remoteproc: maintain a generic child device for each rproc
For each registered rproc, maintain a generic remoteproc device whose
parent is the low level platform-specific device (commonly a pdev, but
it may certainly be any other type of device too).

With this in hand, the resulting device hierarchy might then look like:

omap-rproc.0
 |
 - remoteproc0  <---- new !
    |
    - virtio0
    |
    - virtio1
       |
       - rpmsg0
       |
       - rpmsg1
       |
       - rpmsg2

Where:
- omap-rproc.0 is the low level device that's bound to the
  driver which invokes rproc_register()
- remoteproc0 is the result of this patch, and will be added by the
  remoteproc framework when rproc_register() is invoked
- virtio0 and virtio1 are vdevs that are registered by remoteproc
  when it realizes that they are supported by the firmware
  of the physical remote processor represented by omap-rproc.0
- rpmsg0, rpmsg1 and rpmsg2 are rpmsg devices that represent rpmsg
  channels, and are registerd by the rpmsg bus when it gets notified
  about their existence

Technically, this patch:
- changes 'struct rproc' to contain this generic remoteproc.x device
- creates a new "remoteproc" type, to which this new generic remoteproc.x
  device belong to.
- adds a super simple enumeration method for the indices of the
  remoteproc.x devices
- updates all dev_* messaging to use the generic remoteproc.x device
  instead of the low level platform-specific device
- updates all dma_* allocations to use the parent of remoteproc.x (where
  the platform-specific memory pools, most commonly CMA, are to be found)

Adding this generic device has several merits:
- we can now add remoteproc runtime PM support simply by hooking onto the
  new "remoteproc" type
- all remoteproc log messages will now carry a common name prefix
  instead of having a platform-specific one
- having a device as part of the rproc struct makes it possible to simplify
  refcounting (see subsequent patch)

Thanks to Stephen Boyd <sboyd@codeaurora.org> for suggesting and
discussing these ideas in one of the remoteproc review threads and
to Fernando Guzman Lugo <fernando.lugo@ti.com> for trying them out
with the (upcoming) runtime PM support for remoteproc.

Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-06 00:53:03 +03:00
Ohad Ben-Cohen
6db20ea8d8 remoteproc: allocate vrings on demand, free when not needed
Dynamically allocate the vrings' DMA when the remote processor
is about to be powered on (i.e. when ->find_vqs() is invoked),
and release them as soon as it is powered off (i.e. when ->del_vqs()
is invoked).

The obvious and immediate benefit is better memory utilization, since
memory for the vrings is now only allocated when the relevant remote
processor is used.

Additionally, this approach also makes recovery of a (crashing)
remote processor easier: one just needs to remove the relevant
vdevs, and the entire vrings cleanup takes place automagically.

Tested-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-04 13:27:04 +03:00
Ohad Ben-Cohen
e121aefa7d remoteproc: fix missing CONFIG_FW_LOADER configurations
Remoteproc requires user space firmware loading support, so
let's select FW_LOADER explicitly to avoid painful misconfigurations
(which only show up in runtime).

Cc: stable <stable@vger.kernel.org>
Reported-by: Mark Grosen <mgrosen@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-04 11:01:12 +03:00
Ohad Ben-Cohen
d50394266b remoteproc/omap: fix randconfig unmet direct dependencies
OMAP_REMOTEPROC selects REMOTEPROC and RPMSG, both of which depend
on EXPERIMENTAL, so let's have OMAP_REMOTEPROC depend on EXPERIMENTAL
too, in order to avoid the below randconfig warnings.

warning: (OMAP_REMOTEPROC) selects REMOTEPROC which has unmet direct dependencies (EXPERIMENTAL)
warning: (OMAP_REMOTEPROC) selects RPMSG which has unmet direct dependencies (EXPERIMENTAL)

Cc: stable <stable@vger.kernel.org>
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-04 10:51:10 +03:00
Ohad Ben-Cohen
6b03976288 remoteproc/omap: fix dev_err typo
For some reason one of the dev_err invocations is using a wrong
device so fix that.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: stable@vger.kernel.org
2012-06-17 10:31:03 +03:00
Sjur Brændeland
30338cf09f remoteproc: fix missing fault indication in error-path
If rproc_find_rsc_table() fails, rproc_fw_boot() must set
return-value before jumping to clean_up label. Otherwise no
error value is returned.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: stable@vger.kernel.org
2012-06-10 14:49:46 +03:00
Sjur Brændeland
e981f6d41a remoteproc: fix print format warnings
Fix compile warnings from GCC 4.6.1 when printing values of type size_t.

drivers/remoteproc/remoteproc_core.c:251:6:
warning: format ‘%x’ expects argument of type ‘unsigned int’,
but argument 4 has type ‘size_t’ [-Wformat]
drivers/remoteproc/remoteproc_core.c:938:9:
warning: format ‘%u’ expects argument of type ‘unsigned int’,
but argument 4 has type ‘size_t’ [-Wformat]
drivers/remoteproc/remoteproc_core.c:1023:2:
warning: format ‘%d’ expects argument of type ‘int’,
but argument 4 has type ‘size_t’ [-Wformat]

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: stable@vger.kernel.org
2012-06-10 14:49:39 +03:00
Linus Torvalds
2f83766d4b IOMMU Updates for Linux 3.5
Not much stuff this time. The only change to the IOMMU core code is the
 addition of a handle to the fault handling code. A few updates to the
 AMD IOMMU driver to work around new errata. The other patches are mostly
 fixes and enhancements to the existing ARM IOMMU drivers and
 documentation updates.
 
 A new IOMMU driver for the Exynos platform was also underway but got
 merged via the Samsung tree and is not part of this tree.
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Merge tag 'iommu-updates-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "Not much stuff this time.  The only change to the IOMMU core code is
  the addition of a handle to the fault handling code.  A few updates to
  the AMD IOMMU driver to work around new errata.  The other patches are
  mostly fixes and enhancements to the existing ARM IOMMU drivers and
  documentation updates.

  A new IOMMU driver for the Exynos platform was also underway but got
  merged via the Samsung tree and is not part of this tree."

* tag 'iommu-updates-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  Documentation: kernel-parameters.txt Add amd_iommu_dump
  iommu/core: pass a user-provided token to fault handlers
  iommu/tegra: gart: Fix register offset correctly
  iommu: OMAP: device detach on domain destroy
  iommu: tegra/gart: Add device tree support
  iommu: tegra/gart: use correct gart_device
  iommu/tegra: smmu: Print device name correctly
  iommu/amd: Add workaround for event log erratum
  iommu/amd: Check for the right TLP prefix bit
  dma-debug: release free_entries_lock before saving stack trace
2012-05-30 08:49:28 -07:00
Linus Torvalds
e8650a0823 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial updates from Jiri Kosina:
 "As usual, it's mostly typo fixes, redundant code elimination and some
  documentation updates."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (57 commits)
  edac, mips: don't change code that has been removed in edac/mips tree
  xtensa: Change mail addresses of Hannes Weiner and Oskar Schirmer
  lib: Change mail address of Oskar Schirmer
  net: Change mail address of Oskar Schirmer
  arm/m68k: Change mail address of Sebastian Hess
  i2c: Change mail address of Oskar Schirmer
  net: Fix tcp_build_and_update_options comment in struct tcp_sock
  atomic64_32.h: fix parameter naming mismatch
  Kconfig: replace "--- help ---" with "---help---"
  c2port: fix bogus Kconfig "default no"
  edac: Fix spelling errors.
  qla1280: Remove redundant NULL check before release_firmware() call
  remoteproc: remove redundant NULL check before release_firmware()
  qla2xxx: Remove redundant NULL check before release_firmware() call.
  aic94xx: Get rid of redundant NULL check before release_firmware() call
  tehuti: delete redundant NULL check before release_firmware()
  qlogic: get rid of a redundant test for NULL before call to release_firmware()
  bna: remove redundant NULL test before release_firmware()
  tg3: remove redundant NULL test before release_firmware() call
  typhoon: get rid of redundant conditional before all to release_firmware()
  ...
2012-05-22 19:22:50 -07:00
Ohad Ben-Cohen
77ca233235 iommu/core: pass a user-provided token to fault handlers
Sometimes a single IOMMU user may have to deal with several
different IOMMU devices (e.g. remoteproc).

When an IOMMU fault happens, such users have to regain their
context in order to deal with the fault.

Users can't use the private fields of neither the iommu_domain nor
the IOMMU device, because those are already used by the IOMMU core
and low level driver (respectively).

This patch just simply allows users to pass a private token (most
notably their own context pointer) to iommu_set_fault_handler(),
and then makes sure it is provided back to the users whenever
an IOMMU fault happens.

The patch also adopts remoteproc to the new fault handling
interface, but the real functionality using this (recovery of
remote processors) will only be added later in a subsequent patch
set.

Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-05-22 18:08:08 +02:00
Subramaniam Chanderashekarapuram
6fd98c124c remoteproc: fix off-by-one bug in __rproc_free_vrings
Fix a nasty off-by-one bug in __rproc_free_vrings which
resulted in a memory leak and (for some platforms) failures
to reload the remote processor.

Signed-off-by: Subramaniam Chanderashekarapuram <subramaniam.ca@ti.com>
[ohad@wizery.com: reword commit log, stick with the for loop]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-05-13 23:15:42 +03:00
Jesper Juhl
3cc6e78777 remoteproc: remove redundant NULL check before release_firmware()
release_firmware deals gracefully with NULL pointers, so checking
first is redundant.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-04-30 13:24:45 +02:00
Stephen Boyd
234e340582 simple_open: automatically convert to simple_open()
Many users of debugfs copy the implementation of default_open() when
they want to support a custom read/write function op.  This leads to a
proliferation of the default_open() implementation across the entire
tree.

Now that the common implementation has been consolidated into libfs we
can replace all the users of this function with simple_open().

This replacement was done with the following semantic patch:

<smpl>
@ open @
identifier open_f != simple_open;
identifier i, f;
@@
-int open_f(struct inode *i, struct file *f)
-{
(
-if (i->i_private)
-f->private_data = i->i_private;
|
-f->private_data = i->i_private;
)
-return 0;
-}

@ has_open depends on open @
identifier fops;
identifier open.open_f;
@@
struct file_operations fops = {
...
-.open = open_f,
+.open = simple_open,
...
};
</smpl>

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-04-05 15:25:50 -07:00
Ohad Ben-Cohen
1e3e2c7c46 remoteproc: cleanup resource table parsing paths
rproc_handle_resources() looks for the resource table and then
invokes a resource handler function which it took as a parameter.

This works, but it's a bit unintuitive to follow.

Instead of passing around function pointers, this patch changes
rproc_handle_resource() to just find and return the resource table,
and then the calling sites of rproc_handle_resource() invoke their
resource handlers directly.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:14:44 +02:00
Ohad Ben-Cohen
63140e0ed2 remoteproc: remove the hardcoded vring alignment
Remove the hardcoded vring alignment of 4096 bytes,
and instead utilize tha vring alignment as specified in
the resource table.

This is needed for remote processors that have rigid
memory requirement, and which have found the alignment of
4096 bytes to be excessively big.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:14:37 +02:00
Ohad Ben-Cohen
55f34080d9 remoteproc/omap: remove the mbox_callback limitation
Now that remoteproc supports any number of virtio devices,
the previous sanity check in omap_rproc_mbox_callback
doesn't make sense anymore.

Remove that so we can start supporting multiple vdevs.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:14:23 +02:00
Ohad Ben-Cohen
7a18694162 remoteproc: remove the single rpmsg vdev limitation
Now that the resource table supports publishing a virtio device
in a single resource entry, firmware images can start supporting
more than a single vdev.

This patch removes the single vdev limitation of the remoteproc
framework so multi-vdev firmwares can be leveraged: VDEV resource
entries are parsed when the rproc is registered, and as a result
their vrings are set up and the virtio devices are registered
(and they go away when the rproc goes away).

Moreover, we no longer only support VIRTIO_ID_RPMSG vdevs; any
virtio device type goes now. As a result, there's no more any
rpmsg-specific APIs or code in remoteproc: it all becomes generic
virtio handling.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:14:12 +02:00
Ohad Ben-Cohen
41a6ee09ee remoteproc: safer boot/shutdown order
Boot the remote processor only after setting up the virtqueues,
and shut it down before deleting them.

Remote processors should obey virtio status changes, and
therefore not manipulate/trigger the virtqueues while the virtio
driver isn't ready, but it's just safer not to rely on that
(plus a vq access might already be inflight while a vdev
status is changed).

We also don't have yet status change notifications, but that's
a temporary limitation.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:13:53 +02:00
Ohad Ben-Cohen
04a9016e82 remoteproc: remoteproc_rpmsg -> remoteproc_virtio
At this point remoteproc can only register a single VIRTIO_ID_RPMSG virtio
device.

This limitation is going away soon: remoteproc is getting support for
registering any number of virtio devices and of any type (as
published by the firmware of the remote processor).

Rename remoteproc_rpmsg.c to remoteproc_virtio.c in preparation of
this generalization work.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:13:45 +02:00
Ohad Ben-Cohen
fd2c15ec1d remoteproc: resource table overhaul
The resource table is an array of 'struct fw_resource' members, where
each resource entry is expressed as a single member of that array.

This approach got us this far, but it has a few drawbacks:

1. Different resource entries end up overloading the same members of 'struct
   fw_resource' with different meanings. The resulting code is error prone
   and hard to read and maintain.

2. It's impossible to extend 'struct fw_resource' without breaking the
   existing firmware images (and we already want to: we can't introduce the
   new virito device resource entry with the current scheme).

3. It doesn't scale: 'struct fw_resource' must be as big as the largest
   resource entry type. As a result, smaller resource entries end up
   utilizing only small part of it.

This is fixed by defining a dedicated structure for every resource type,
and then converting the resource table to a list of type-value members.
Instead of a rigid array of homogeneous structs, the resource table
is turned into a collection of heterogeneous structures.

This way:
1. Resource entries consume exactly the amount of bytes they need.
2. It's easy to extend: just create a new resource entry structure, and assign
   it a new type.
3. The code is easier to read and maintain: the structures' members names are
   meaningful.

While we're at it, this patch has several other resource table changes:
1. The resource table gains a simple header which contains the
   number of entries in the table and their offsets within the table. This
   makes the parsing code simpler and easier to read.
2. A version member is added to the resource table. Should we change the
   format again, we'll bump up this version to prevent breakage with
   existing firmware images.
3. The VRING and VIRTIO_DEV resource entries are combined to a single
   VDEV entry. This paves the way to supporting multiple VDEV entries.
4. Since we don't really support 64-bit rprocs yet, convert two stray u64
   members to u32.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
2012-03-06 19:13:39 +02:00
Ohad Ben-Cohen
9cd8eb433c remoteproc/omap: two Kconfig fixes
1. Depend on OMAP_IOMMU instead of selecting it, to fix an unmet
   direct dependency of it (and its imminent build error)
2. Set default to 'no' (achieved implicitly by dropping the 'default'
   line)

Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: Suman Anna <s-anna@ti.com>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Cc: Rob Clark <rob@ti.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
2012-02-28 19:09:16 +02:00
Ohad Ben-Cohen
40b78b2cc7 remoteproc: make sure we're parsing a 32bit firmware
Make sure we're parsing a 32bit image, since we only support
the ELF32 binary format at this point.

This should prevent unexpected behavior with non 32bit binaries.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: Suman Anna <s-anna@ti.com>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Cc: Rob Clark <rob@ti.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
2012-02-28 18:03:40 +02:00
Ohad Ben-Cohen
e12bc14b88 remoteproc: s/big switch/lookup table/
A lookup table would be easier to extend, and the resulting
code is a bit cleaner.

Reported-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-22 18:28:49 +02:00
Ohad Ben-Cohen
cf59d3e9a7 remoteproc: bail out if firmware has different endianess
At this point we don't support remote processors that have
a different endianess than the host.

Look out for these unsupported scenarios, and bail out if
encountered.

Reported-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Mark Grosen <mgrosen@ti.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
2012-02-22 18:28:49 +02:00
Ohad Ben-Cohen
dd6da1c5e9 remoteproc: don't use virtio's weak barriers
When creating a virtqueue for rpmsg, tell virtio we're not interested
in "weak" smp barriers, since we're talking to a real device.

On ARM, this means using a DSB instead of a DMB, which is needed
for platforms that kick the remote processor using some kind of
a mailbox device mapped to Device memory (otherwise the kick can
jump ahead and wake the remote processor before it has observed
the changes to the vrings).

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-22 18:28:48 +02:00
Ohad Ben-Cohen
489d129a2f remoteproc: depend on EXPERIMENTAL
Remoteproc is still under development and as it gets traction we
definitely expect to do some changes in the binary format (most probably
only in the resource table, e.g. the upcoming move to TLV-based entries).

Active testing and use of remoteproc is most welcome, but we don't want
users to expect backward binary compatibility with the preliminary
images we have today.

Therefore mark remoteproc as EXPERIMENTAL, and explicitly inform the user
about this when a new remote processor is registered.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Rob Clark <rob@ti.com>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
2012-02-22 18:28:34 +02:00
Ohad Ben-Cohen
650d65611e remoteproc: add Kconfig menu
Add a dedicated Kconfig menu for the remoteproc drivers, so they
don't show up in the main driver menu.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-08 22:54:43 +02:00
Ohad Ben-Cohen
9bc9123117 remoteproc: look for truncated firmware images
Make sure firmware isn't truncated before accessing its data.

Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-08 22:54:37 +02:00
Ohad Ben-Cohen
63d667bf53 remoteproc/omap: utilize module_platform_driver
Ditch some boilerplate code by employing the module_platform_driver
helper.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-08 22:54:30 +02:00
Mark Grosen
7d2d3956fb remoteproc: avoid registering a virtio device if not supported
Let remoteproc know when the firmware doesn't support any virtio
functionality, so registering a virtio device can be avoided.

This is needed for remote processors that doesn't require any
virtio-based communications, but are still controlled via remoteproc.

[ohad@wizery.com: write commit log]

Signed-off-by: Mark Grosen <mgrosen@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-08 22:54:17 +02:00
Mark Grosen
0798e1da7a remoteproc: do not require an iommu
Not all remote processors employ an IOMMU, so do not error out
on !iommu_present().

Note: we currently still use iommu_present() to tell whether we need
to configure an IOMMU or not. That works for simple cases, but will
easily fail with more complicated ones (e.g. where an IOMMU exists,
but not all remote processors use it). When those use cases show up,
we will solve them by introducing something like remoteproc hw
capabilities.

[ohad@wizery.com: write commit log]

Signed-off-by: Mark Grosen <mgrosen@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-02-08 22:54:11 +02:00
Ohad Ben-Cohen
34ed5a33b1 remoteproc/omap: add a remoteproc driver for OMAP4
Add a remoteproc driver for OMAP4, so we can boot the dual-M3 and
and DSP subsystems.

Use the omap_device_* API to control the hardware state, and utilize
the OMAP mailbox to interrupt the remote processor when a new message
is pending (the mailbox payload is used to tell it which virtqueue was
the message placed in).

Conversely, when an inbound mailbox message arrives, tell the remoteproc
core which virtqueue is triggered.

Later we will also use the mailbox payload to signal omap-specific
events like remote crashes (which will be used to trigger remoteproc
recovery) and power management transitions. At that point we will also
extend the remoteproc core to support this.

Based on (but now quite far from) work done by Fernando Guzman Lugo
<fernando.lugo@ti.com> and Hari Kanigeri <h-kanigeri2@ti.com>.

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

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
2012-02-08 22:53:47 +02:00
Ohad Ben-Cohen
ac8954a413 remoteproc: create rpmsg virtio device
Create an rpmsg virtio device to allow message-based communication
with the remote processor (but only if supported by its firmware).

There are several advantages to provide this functionality at
the remoteproc-level:
- to support it, platforms only have to provide their own ->kick()
  handler; no need to duplicate the rest of the code.
- the virtio device is created only when the remote processor is
  registered and ready to go. No need to depend on initcall magic.
  moreover, we only add the virtio device if the firmware really
  supports it, and only after we know the supported virtio device features.
- correct device model hierarchy can be set, and that is useful
  for natural power management and DMA API behavior.
- when the remote processor crashes (or removed) we only need
  to remove the virtio device, and the driver core will take care of
  the rest. No need to implement any out-of-bound notifiers.
- we can now easily bind the virtio device to its rproc handle, and
  this way we don't need any name-based remoteproc ->get() API.

Currently we only support creating a single rpmsg virtio device per
remote processor, but later this is going to be extended to support
creating numerous virtio devices of other types too (block, net,
console...).

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

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
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: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
2012-02-08 22:53:39 +02:00
Ohad Ben-Cohen
6391a70682 remoteproc: add debugfs entries
Expose several remote processor properties (name, state, trace buffer)
that are helpful for debugging.

This part is extracted to a separate patch just to keep the review load
down.

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

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Brian Swetland <swetland@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
2012-02-08 22:53:30 +02:00
Ohad Ben-Cohen
400e64df6b remoteproc: add framework for controlling remote processors
Modern SoCs typically employ a central symmetric multiprocessing (SMP)
application processor running Linux, with several other asymmetric
multiprocessing (AMP) heterogeneous processors running different instances
of operating system, whether Linux or any other flavor of real-time OS.

Booting a remote processor in an AMP configuration typically involves:
- Loading a firmware which contains the OS image
- Allocating and providing it required system resources (e.g. memory)
- Programming an IOMMU (when relevant)
- Powering on the device

This patch introduces a generic framework that allows drivers to do
that. In the future, this framework will also include runtime power
management and error recovery.

Based on (but now quite far from) work done by Fernando Guzman Lugo
<fernando.lugo@ti.com>.

ELF loader was written by Mark Grosen <mgrosen@ti.com>, based on
msm's Peripheral Image Loader (PIL) by Stephen Boyd <sboyd@codeaurora.org>.

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

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Brian Swetland <swetland@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
2012-02-08 22:52:56 +02:00