Commit Graph

58 Commits

Author SHA1 Message Date
Roman Kiryanov
92c320b97e platform: goldfish: pipe: Rename goldfish_x to goldfish_pipe_x
Add "pipe" to the pipe related function names.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
a0739604f4 platform: goldfish: pipe: Remove reduntant casting to (void)
Casting to (void) is no-op.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
61b38f027f platform: goldfish: pipe: Rename 'wakeBit' to 'wake_bit'
checkpatch: Avoid CamelCase

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
1d1021a0f9 platform: goldfish: pipe: Remove a blank line before '}'
checkpatch: Blank lines aren't necessary before a close brace '}'

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
468e62f92e platform: goldfish: pipe: Remove reduntant casting
Casting to u32 is not required here.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
610a72b707 platform: goldfish: pipe: Replace two code blocks with a function call
Two function calls look cleaner because the function introduces
takes case of all bit shifting and casting.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
2ed43e53e3 platform: goldfish: pipe: Remove a redundant variable
The variable was not very useful.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
46928cc6ff platform: goldfish: pipe: Add blank lines to separate struct members
To improve readability and to be consistent with other
struct members.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
25b97d5706 platform: goldfish: pipe: Replace pr_ with dev_ for logging
dev_ is preferred if struct device is available.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
869fd5023a platform: goldfish: pipe: Replace an array of 1 with a variable
There is no reason to have an array of 1.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
d23069a5a5 platform: goldfish: pipe: Fail compilation if structs are too large
Since the driver provides no workaround prevent in cases if structs do
no fit into a memory page, it is better to fail complation to find about
the issue earlt instead of returning errors at runtime.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
84ae527aa5 platform: goldfish: pipe: Update the comment for GFP_ATOMIC
Provide an explanation why GFP_ATOMIC is needed to prevent changing it to
other values.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
95577010a4 platform: goldfish: pipe: Separate the host interface to a separate header
These are several enums that must kept in sync with the host side.
This change explicitly separates them into a dedicated header file.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
53bdf6686e platform: goldfish: pipe: Move an opening brace to the next line
checkpatch: Function's opening brace has to be at the
beginning of the next line.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
c3c4e307db platform: goldfish: pipe: Update license
goldfish_pipe is distributed under GPL v2.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
ed82421565 platform: goldfish: pipe: Fix comments to fit 80 columns
Some comment lines are longer than 80 symbols.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:31:30 +02:00
Roman Kiryanov
9a481bdc16 platform: goldfish: Retire pdev_bus
Not used by goldfish.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-02 10:24:51 +02:00
Randy Dunlap
ac3167257b headers: separate linux/mod_devicetable.h from linux/platform_device.h
At over 4000 #includes, <linux/platform_device.h> is the 9th most
#included header file in the Linux kernel.  It does not need
<linux/mod_devicetable.h>, so drop that header and explicitly add
<linux/mod_devicetable.h> to source files that need it.

   4146 #include <linux/platform_device.h>

After this patch, there are 225 files that use <linux/mod_devicetable.h>,
for a reduction of around 3900 times that <linux/mod_devicetable.h>
does not have to be read & parsed.

    225 #include <linux/mod_devicetable.h>

This patch was build-tested on 20 different arch-es.

It also makes these drivers SubmitChecklist#1 compliant.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/
Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07 17:52:26 +02:00
Colin Ian King
ea4ba866d1 goldfish_pipe: make tasklet goldfish_interrupt_tasklet static
Tasklet goldfish_interrupt_tasklet is local to the source and
does not need to be in global scope, so make it static.

Cleans up sparse warning:
symbol 'goldfish_interrupt_tasklet' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-03 13:01:57 +02:00
Linus Torvalds
a9a08845e9 vfs: do bulk POLL* -> EPOLL* replacement
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-11 14:34:03 -08:00
Al Viro
afc9a42b74 the rest of drivers/*: annotate ->poll() instances
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-11-28 11:06:58 -05:00
Greg Kroah-Hartman
069a0f32c9 Merge 4.12-rc5 into char-misc-next
We want the char/misc driver fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-12 08:18:10 +02:00
Wei Yongjun
3eff8ecd27 goldfish_pipe: use GFP_ATOMIC under spin lock
The function get_free_pipe_id_locked() is called from
goldfish_pipe_open() with a lock is held, so we should
use GFP_ATOMIC instead of GFP_KERNEL.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-25 18:26:11 +02:00
Colin Ian King
70caf70916 goldfish_pipe: make pipe_dev static
Make this static as it's only referenced in this source and
it does not need global scope.

Cleans up a sparse warning:

drivers/platform/goldfish/goldfish_pipe.c: warning: symbol
  'pipe_dev' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-25 18:24:03 +02:00
Greg Kroah-Hartman
f563dab417 goldfish_pipe: fix build warning about using too much stack.
The new goldfish_pipe code used too much stack space in the
transfer_max_buffers() call.  As the function is serialized with a lock,
let's make the buffer static to not use the stack for the large buffer.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Yurii Zubrytskyi <zyy@google.com>
Cc: Jin Qian <jinqian@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-26 11:43:39 +02:00
Jin Qian
726ea1a8ea goldfish_pipe: An implementation of more parallel pipe
This is a driver code for a redesigned android pipe.
Currently it works for x86 and x64 emulators with the following
performance results:
  ADB push to /dev/null,
  Ubuntu,
  400 MB file,
  times are for (1 / 10 / 100) parallel adb commands
x86 adb push: (4.4s / 11.5s / 2m10s) -> (2.8s / 6s / 51s)
x64 adb push: (7s / 15s / (too long, 6m+) -> (2.7s / 6.2s / 52s)

ADB pull and push to /data/ have the same %% of speedup
More importantly, I don't see any signs of slowdowns when
run in parallel with Antutu benchmark, so it is definitely
making much better job at multithreading.

Signed-off-by: Yurii Zubrytskyi <zyy@google.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-26 11:43:03 +02:00
Thomas Gleixner
6cf18e6927 goldfish: Sanitize the broken interrupt handler
This interrupt handler is broken in several ways:

  - It loops forever when the op code is not decodeable

  - It never returns IRQ_HANDLED because the only way to exit the loop
    returns IRQ_NONE unconditionally.

The whole concept of this is broken. Creating devices in an interrupt
handler is beyond any point of sanity.

Make it at least behave halfways sane so accidental users do not have to
deal with a hard to debug lockup.

Fixes: e809c22b8f ("goldfish: add the goldfish virtual bus")
Reported-by: Gabriel C <nix.or.die@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-15 08:49:58 -08:00
Lorenzo Stoakes
052662cada platform: goldfish: pipe: use get_user_pages_unlocked()
Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code
and takes advantage of VM_FAULT_RETRY functionality when faulting in pages.

Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-10 15:34:56 +01:00
Lorenzo Stoakes
768ae309a9 mm: replace get_user_pages() write/force parameters with gup_flags
This removes the 'write' and 'force' from get_user_pages() and replaces
them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers
as use of this flag can result in surprising behaviour (and hence bugs)
within the mm subsystem.

Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-19 08:11:43 -07:00
Linus Torvalds
cb107161df Convert straggling drivers to new six-argument get_user_pages()
Commit d4edcf0d56 ("mm/gup: Switch all callers of get_user_pages() to
not pass tsk/mm") switched get_user_pages() callers to the simpler model
where they no longer pass in the thread and mm pointer.  But since then
we've merged changes to a few drivers that re-introduce use of the old
interface.  Let's fix them up.

They continued to work fine (thanks to the truly disgusting macros
introduced in commit cde70140fe: "mm/gup: Overload get_user_pages()
functions"), but cause unnecessary build noise.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-02 18:35:05 -05:00
Linus Torvalds
9dffdb38d8 Staging driver patches for 4.6-rc1
Here is the big staging driver pull request for 4.6-rc1.
 
 Lots of little things here, over 1600 patches or so.  Notible is all of
 the good Lustre work happening, those developers have finally woken up
 and are cleaning up their code greatly.  The Outreachy intern
 application process is also happening, which brought in another 400 or
 so patches.  Full details are in the very long shortlog.
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver updates from Greg KH:
 "Here is the big staging driver pull request for 4.6-rc1.

  Lots of little things here, over 1600 patches or so.  Notable is all
  of the good Lustre work happening, those developers have finally woken
  up and are cleaning up their code greatly.  The Outreachy intern
  application process is also happening, which brought in another 400 or
  so patches.  Full details are in the very long shortlog.

  All of these have been in linux-next with no reported issues"

* tag 'staging-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1673 commits)
  staging: lustre: fix aligments in lnet selftest
  staging: lustre: report minimum of two buffers for LNet selftest load test
  staging: lustre: test for proper errno code in lstcon_rpc_trans_abort
  staging: lustre: filter remaining extra spacing for lnet selftest
  staging: lustre: remove extra spacing when setting variable for lnet selftest
  staging: lustre: remove extra spacing of variable declartions for lnet selftest
  staging: lustre: fix spacing issues checkpatch reported in lnet selftest
  staging: lustre: remove returns in void function for lnet selftest
  staging: lustre: fix bogus lst errors for lnet selftest
  staging: netlogic: Replacing pr_err with dev_err after the call to devm_kzalloc
  staging: mt29f_spinand: Replacing pr_info with dev_info after the call to devm_kzalloc
  staging: android: ion: fix up file mode
  staging: ion: debugfs invalid gfp mask
  staging: rts5208: Replace pci_enable_device with pcim_enable_device
  Staging: ieee80211: Place constant on right side of the test.
  staging: speakup: Replace del_timer with del_timer_sync
  staging: lowmemorykiller: fix 2 checks that checkpatch complained
  staging: mt29f_spinand: Drop void pointer cast
  staging: rdma: hfi1: file_ops: Replace ALIGN with PAGE_ALIGN
  staging: rdma: hfi1: driver: Replace IS_ALIGNED with PAGE_ALIGNED
  ...
2016-03-17 22:13:41 -07:00
Krzysztof Kozlowski
1661753568 goldfish: Fix build error of missing ioremap on UM
Add missing HAS_IOMEM dependency to fix the allyesconfig build error on
ARCH=um (for x86_64):

drivers/platform/goldfish/pdev_bus.c: In function ‘goldfish_pdev_bus_probe’:
drivers/platform/goldfish/pdev_bus.c:191:18: error: implicit declaration of function ‘ioremap’ [-Werror=implicit-function-declaration]
  pdev_bus_base = ioremap(pdev_bus_addr, pdev_bus_len);

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-05 12:33:58 -08:00
Greg Kroah-Hartman
bb27d4998a Merge char-misc-next into staging-next
This resolves the merge issues and confusions people were having with
the goldfish drivers due to changes for them showing up in two different
trees.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-22 14:46:24 -08:00
Shraddha Barke
1d427da1d7 Platform: goldfish: goldfish_pipe.c: Add DMA support using managed version
Coherent mapping guarantees that the device and CPU are in sync.

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-14 17:43:05 -08:00
Dan Carpenter
5fae054c2b goldfish: locking bugs in goldfish_pipe_read_write()
We recently messed up the error handling here.  We can return with the
pipe->lock held or sometimes we unlock twice by mistake.

Fixes: 2f3be88237 ('goldfish_pipe: Pin pages to memory while copying and other cleanups')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-07 21:26:57 -08:00
Jason Hu
d62f324b0a goldfish: Enable ACPI-based enumeration for android pipe
Add ACPI binding to the android pipe driver

Signed-off-by: Jason Hu <jia-cheng.hu@intel.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Yu Ning
4f42071c94 goldfish_pipe: Pass physical addresses to the device if supported
For reading and writing guest user space buffers, currently the kernel
sends the guest virtual address of the buffer to the pipe device. This
virtual address has to be first converted to a guest physical address.
Doing this translation on the QEMU side is inefficient and requires
additional handling when KVM is enabled, whose implementation would
either incur intrusive changes to QEMU's KVM support code or suffer
from poor performance, see commit 08c7228c50f8 ("x86-kvm: only sync
SREGS when doing address translation") of $AOSP/external/qemu for
details, and thus should be avoided if possible.

There is a TODO comment in hw/misc/android_pipe.c in the new Android
emulator source tree ($AOSP/external/qemu-android) which requests that
the translation be done on the kernel side and that physical addresses
be passed to the device instead of virtual ones. Once the QEMU-side
implementation is done, the kernel will need to support both the new
paddr-based pipe device and the old vaddr-based one (which will
continue to be used by the classic emulator). This patch achieves that
by leveraging the device version register available in the new device.

See https://android-review.googlesource.com/128280 for the QEMU-side
patch.

In addition, use the mmap semaphore (in read mode) to safeguard the
call to get_user_pages().

Signed-off-by: Yu Ning <yu.ning@intel.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Miodrag Dinic
2e5fc89ac5 Enable platform support for Goldfish virtual devices
Enable CONFIG_GOLDFISH for MIPS platforms.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Greg Hackmann
25dd0f4073 platform: goldfish: pipe: don't log when dropping PIPE_ERROR_AGAIN
On PIPE_ERROR_AGAIN, just stopping in the middle of a transfer and
returning the number of bytes actually handled is the right behavior.

Other errors should be returned on the next read() or write() call.
Continue logging those until we confirm nothing actually relies on the
existing (wrong) behavior of dropping errors on the floor.

Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Greg Hackmann
91a18a4141 platform: goldfish: pipe: add devicetree bindings
Add bindings so we don't need to rely on goldfish virtual bus for
probing any more, which means we don't need ARM and MIPS goldfish
board code for instantiating the bus.

In the long term we would like to move towards replacing the Android
pipe with virtio-vsock that is currently under development.

Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Christoffer Dall
2f3be88237 goldfish_pipe: Pin pages to memory while copying and other cleanups
The existing code had a troubling TODO statement concerning the fact
that it just did a check if the page that the QEMU backend was going to
read from / write to was there before the call to the QEMU backend and
then relying on the fact that the page stayed around, even in a
preemptible SMP kernel.  Obviously the page could go away or be
reassigned, and strange things may happen.

Further, writes were not tracked, so any use of COW or KSM-like
features would break completely.  Probably that was never used by adbd
(the only current active user of the pipe), but could prove much more
dangerous for the GPU passthrough mechanism.

Instead, use get_user_pages() as the comment suggested and cleanup the
error path and add the set_page_dirt() call on a successful read
operation.

Also clarify the count used to return from successful read/write calls
and use Linux style commentary in various places of the file.

Note: The "just ignore error and return whatever we read so far" error
handling is really quite horrific.  I cannot change it without a more
careful study of all user space ABIs reliance on this 'feature'.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Alex Bennée
23c5ee21c4 goldfish_pipe: don't be clever with #define offsets
It just makes it harder to figure out which commands are being used.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Greg Hackmann
bd2f348db5 goldfish: refactor goldfish platform configs
On new virtual devices, the goldfish virtual bus can be replaced with
autoprobing infrastructure like Device Tree.  Refactor the goldfish
kernel configs to better accommodate this.

Move the goldfish platform into a menuconfig in the style of the chrome
platform, and separate the goldfish bus into its own config option.

Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Jin Qian <jinqian@android.com>
[Corrected a tristate to bool]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28 23:34:36 -08:00
Linus Torvalds
75462c8a87 Replace module_platform_driver with builtin_platform driver in non modules.
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Merge tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Pull module_platform_driver replacement from Paul Gortmaker:
 "Replace module_platform_driver with builtin_platform driver in non
  modules.

  We see an increasing number of non-modular drivers using
  modular_driver() type register functions.  There are several downsides
  to letting this continue unchecked:

   - The code can appear modular to a reader of the code, and they won't
     know if the code really is modular without checking the Makefile
     and Kconfig to see if compilation is governed by a bool or
     tristate.

   - Coders of drivers may be tempted to code up an __exit function that
     is never used, just in order to satisfy the required three args of
     the modular registration function.

   - Non-modular code ends up including the <module.h> which increases
     CPP overhead that they don't need.

   - It hinders us from performing better separation of the module init
     code and the generic init code.

  So here we introduce similar macros for builtin drivers.  Then we
  convert builtin drivers (controlled by a bool Kconfig) by making the
  following type of mapping:

    module_platform_driver()       --->  builtin_platform_driver()
    module_platform_driver_probe() --->  builtin_platform_driver_probe().

  The set of drivers that are converted here are just the ones that
  showed up as relying on an implicit include of <module.h> during a
  pending header cleanup.  So we convert them here vs adding an include
  of <module.h> to non-modular code to avoid compile fails.  Additonal
  conversions can be done asynchronously at any time.

  Once again, an unused module_exit function that is removed here
  appears in the diffstat as an outlier wrt all the other changes"

* tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  drivers/clk: convert sunxi/clk-mod0.c to use builtin_platform_driver
  drivers/power: Convert non-modular syscon-reboot to use builtin_platform_driver
  drivers/soc: Convert non-modular soc-realview to use builtin_platform_driver
  drivers/soc: Convert non-modular tegra/pmc to use builtin_platform_driver
  drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver
  drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver
  drivers/platform: Convert non-modular pdev_bus to use builtin_platform_driver
  platform_device: better support builtin boilerplate avoidance
2015-07-02 10:42:13 -07:00
Linus Torvalds
23908db413 Staging driver patches for 4.2-rc1
Here's the big, really big, staging tree patches for 4.2-rc1.
 
 Loads of stuff in here, almost all just coding style fixes / churn, and
 a few new drivers as well, one of which I just disabled from the build a
 few minutes ago due to way too many build warnings.
 
 Other than the one "disable this driver" patch, all of these have been
 in linux-next for quite a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver updates from Greg KH:
 "Here's the big, really big, staging tree patches for 4.2-rc1.

  Loads of stuff in here, almost all just coding style fixes / churn,
  and a few new drivers as well, one of which I just disabled from the
  build a few minutes ago due to way too many build warnings.

  Other than the one "disable this driver" patch, all of these have been
  in linux-next for quite a while with no reported issues"

* tag 'staging-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1163 commits)
  staging: wilc1000: disable driver due to build warnings
  Staging: rts5208: fix CHANGE_LINK_STATE value
  Staging: sm750fb: ddk750_swi2c.c: Insert spaces before parenthesis
  Staging: sm750fb: ddk750_swi2c.c: Place braces on correct lines
  Staging: sm750fb: ddk750_swi2c.c: Insert spaces around operators
  Staging: sm750fb: ddk750_swi2c.c: Replace spaces with tabs
  Staging: sm750fb: ddk750_swi2c.h: Shorten lines to under 80 characters
  Staging: sm750fb: ddk750_swi2c.h: Replace spaces with tabs
  Staging: sm750fb: modedb.h: Shorten lines to under 80 characters
  Staging: sm750fb: modedb.h: Replace spaces with tabs
  staging: comedi: addi_apci_3120: rename 'this_board' variables
  staging: comedi: addi_apci_1516: rename 'this_board' variables
  staging: comedi: ni_atmio: cleanup ni_getboardtype()
  staging: comedi: vmk80xx: sanity check context used to get the boardinfo
  staging: comedi: vmk80xx: rename 'boardinfo' variables
  staging: comedi: dt3000: rename 'this_board' variables
  staging: comedi: adv_pci_dio: rename 'this_board' variables
  staging: comedi: cb_pcidas64: rename 'thisboard' variables
  staging: comedi: cb_pcidas: rename 'thisboard' variables
  staging: comedi: me4000: rename 'thisboard' variables
  ...
2015-06-26 15:46:08 -07:00
Paul Gortmaker
1dda2b42db drivers/platform: Convert non-modular pdev_bus to use builtin_platform_driver
This driver is configured with a Kconfig option that is
declared as a bool.  Hence it is not possible for the code
to be built as modular.  However the code is currently using
the module_platform_driver() macro for driver registration.

While this currently works, we really don't want to be including
the module.h header in non-modular code, which we'll be forced
to do, pending some upcoming code relocation from init.h into
module.h.  So we fix it now by using the non-modular equivalent.
And since we've already established that the code is non-modular,
we can completely drop any code relating to module_exit.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2015-06-16 14:12:38 -04:00
Peter Senna Tschudin
07d783fd83 staging: goldfish: Fix pointer cast for 32 bits
As the first argument of gf_write64() was of type unsigned long, and as
some calls to gf_write64() were casting the first argument from void *
to u64 the compiler and/or sparse were printing warnings for casts of
wrong sizes when compiling for i386.

This patch changes the type of the first argument of gf_write64() to
const void *, and update calls to the function. This change fixed the
warnings and allowed to remove casts from 3 calls to gf_write64().

In addition gf_write64() was renamed to gf_write_ptr() as the name was
misleading because it only writes 32 bits on 32 bit systems.

gf_write_dma_addr() was added to handle dma_addr_t values which is
used at drivers/staging/goldfish/goldfish_audio.c.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-31 11:40:14 +09:00
Joe Perches
3411d035eb goldfish_pipe: Fix unlikely() misuse
Move the close parenthesis.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-24 12:24:35 -07:00
Octavian Purdila
f4e131dc38 goldfish: pipe: fix warnings for 32bit builds
drivers/platform/goldfish/goldfish_pipe.c: In function 'goldfish_cmd_status':
drivers/platform/goldfish/goldfish_pipe.c:164:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL);
                 ^
drivers/platform/goldfish/goldfish_pipe.c: In function 'goldfish_cmd':
drivers/platform/goldfish/goldfish_pipe.c:180:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL);
                 ^
drivers/platform/goldfish/goldfish_pipe.c: In function 'goldfish_pipe_read_write':
drivers/platform/goldfish/goldfish_pipe.c:337:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
       writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL);

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Jun Tian <jun.j.tian@intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-16 11:32:51 -07:00
Octavian Purdila
f2dbdf625d goldfish: bus: fix warnings for 32bit builds
drivers/platform/goldfish/pdev_bus.c: In function 'goldfish_new_pdev':
drivers/platform/goldfish/pdev_bus.c:136:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  writel((u32)(u64)name, pdev_bus_base + PDEV_BUS_GET_NAME);

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Jun Tian <jun.j.tian@intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-16 11:32:51 -07:00