Avoid shutdown due to battery capacity or temperature out of range.
Change-Id: I54abe4dc54bf2fb8a9b972a3940e6fd93cc60473
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Previously, metadata was stored in the allocated pages themselves
during allocation. However the system can only have a limited
number of kmapped pages. A very large allocation might exceed
this limit.
Change-Id: Ibe972096e83924bf5e621d8282c4cd133ca75b0a
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Since the smp call to stop the other cpus are handled in those
cpus in interrupt context, there's a potential for those smp
handlers to interrupt threads holding spin locks (such as the
one a mutex holds). This prevents those threads from ever
releasing their spin lock, so if the cpu doing the shutdown
is allowed to switch to another thread that tries to grab the
same lock/mutex, we could get into a deadlock (the spin lock
call is called with preemption disabled in the mutex lock code).
To avoid that possibility, disable preemption before doing the
smp_send_stop().
Change-Id: I7976c5382d7173fcb3cd14da8cc5083d442b2544
Signed-off-by: Mike J. Chen <mjchen@google.com>
Refactor the dpm suspend watchdog code and add watchdogs
on resume too. The dpm wachdog prints the stack trace and
reboots the system if a device takes more than 12 seconds
to suspend or resume.
Change-Id: If00c047a17b80bdc13a8426393c698bc450a7347
Signed-off-by: Benoit Goby <benoit@android.com>
Based on Tuna code from 3.0 ported to 3.4 alarm API.
Change-Id: I9b13209963d5a5043237e9e29f3cb07c40583af2
Signed-off-by: Todd Poynor <toddpoynor@google.com>
If dma_buf_fd fails, the dma_buf needs to be cleaned up by
calling dma_buf_put. dma_buf_put will call ion_dma_buf_release
which in turn calls ion_buffer_put to clean up the buffer
reference. Calling ion_buffer_put after dma_buf_put drops the
reference count by one more which is incorrect. Fix this by
getting rid of the extra ion_buffer_put call.
Change-Id: Ieb3a7b781bf2dc299c45384dbf0a12d186adeb22
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Add a generic battery power supply and glue logic for talking to the
board battery driver. This driver handles common chores such as:
* periodic battery level and health monitoring
* kernel log reporting and other debugging features for key
properties provided by different charger, fuel gauge, etc.
components
* ensure properties such as battery health are made available to
userspace
* common processing for board-level battery/case temperature sensors
and policy for charging status based on battery health
Based on work by himihee.seo@samsung.com, ms925.kim@samsung.com, and
joshua.chang@samsung.com.
Change-Id: I5fa8e8d68811d84820b7a130b0245ad2b5b6d36b
Signed-off-by: Todd Poynor <toddpoynor@google.com>
ION_IOC_MAP, ION_IOC_SHARE, and ION_IOC_IMPORT may return
success when an error occurs.
Add correct error handling to ION_IOC_MAP, ION_IOC_SHARE, and
ION_IOC_IMPORT.
Change-Id: I61c6b0c574da425604235b2d39e13e4a27f7b6f3
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Several functions in the ion interface is missing
EXPORT_SYMBOL. This is needed to allow clients to
use these functions from kernel modules.
Add EXPORT_SYMBOL to functions that are supposed
to be exposed.
Change-Id: I25611f7c367fd131daf5fb652abbea77e89a3d06
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
The condition argument to the WARN call in ion_free and
ion_share_dma_buf are missing. Add the argument to
allow correct printing of warning message.
Change-Id: I9b233992d5034f8780296cae6b42d77699f14cce
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
mmc_sdio_init_card function is doing necessary initialization
Change-Id: I7d2e432b2af8a76267378acba07e3e4e8fd1e6bc
Signed-off-by: Hosung Kim <hosung0.kim@samsung.com>
kernel_restart cannot be called from interrupt context. Add support for
commands called from a work function, and implement the "reboot" command
there. Also rename the existing irq-mode command to "reset" and change
it to use machine_restart instead of kernel_restart.
Change-Id: I3c423147c01db03d89e95a5b99096ca89462079f
Signed-off-by: Colin Cross <ccross@android.com>
Not useful to have a separate, non-realtime workqueue for speed down
events, avoid priority inversion for speed up events.
Change-Id: Iddcd05545245c847aa1bbe0b8790092914c813d2
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Fix a problem where the hung task mechanism was deeming the interactive
clock boost thread as hung. This was because the thread is created at
module init but never run/woken up until needed. If the governor is not
being used this can be forever. To workaround this explicitly wake up
the thread once all the necessary data structures are initialized. The
latter required some minor code shuffle.
Signed-off-by: Sam Leffler <sleffler@chromium.org>
Change-Id: Ie2c058dd75dcb6460ea10e7ac997e46baf66b1fe
Register an idle notifier only when the governor is active. Also
short-circuit work of idle end if the governor is not enabled.
Signed-off-by: Sam Leffler <sleffler@chromium.org>
Change-Id: I4cae36dd2e7389540d337d74745ffbaa0131870f
Don't reset next_string_id every time the gadget is enabled, this makes
the next strings allocated overwrite strings allocated at probe time.
Instead, fix rndis not to allocate new string ids on every config bind.
Change-Id: Ied28ee416bb6f00c434c34176fe5b7f0dcb2b2d4
Signed-off-by: Benoit Goby <benoit@android.com>
This is deprecated in favor of using the dma_buf api which will
automatically sync a buffer to memory when it is mapped to a device.
However, that functionality is not ready, so this patch adds the
ability to sync a buffer explicitly.
Change-Id: Ia15810a13cd5c4b939f4afa5c8e721c89fac76d4
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
On some systems there is a performance benefit to reducing tlb pressure
by minimizing the number of chunks in an allocation.
Change-Id: Ie6ff215a5f32a837bf3103f79a09748e38759f0e
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
This patch adds cache maintenance operations to ion. As per mailing
list discussions regarding dma_buf, cache operations are done implicitly.
At buffer allocaiton time the user can select whether he'd like mappings
(both kernel and user) to be cached. When cached mappings are selected,
no mappings will be created for a buffer at mmap time. Instead pages will
be faulted in one at a time so we can track which pages require flushing
before dma. When the buffers are mapped for dma (via the dma_buf apis)
any pages which were touched will be synced for device.
Change-Id: Id5d6894e8bb52af038c91dd895143bf3b4203b0b
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
create_bulk_endpoints should not be __init since it is called when
accessory is enabled
Change-Id: If827a4531f0f6c15af938345163923186368e2a5
Signed-off-by: Benoit Goby <benoit@android.com>
And supply name will be used as wakeup source name.
Change-Id: I53075491c6e1a4c66755afe8a40b7166cd8d6cb2
Signed-off-by: Todd Poynor <toddpoynor@google.com>
When mapping carveout buffers into userspace, only map
the size of the vma given, not the full size of the buffer
since clients may map less than the buffer size.
Change-Id: I1b391b23219455e879a900d947c728db3c8c4a76
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
When destroying a handle, all kernel mappings to that handle
should be destroyed. Other handles may still have references
and valid mappings to the buffer underneath which should not
be destroyed. Loop on the handle reference count, not the buffer
reference count to get rid of all kernel mappings for the handle.
Change-Id: I7dc5d6a86513fc5fa4e21110ceab434714ea2493
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Previously the ion_system_heap was using GFP_KERNEL, forcing all allocations
to be in lowmem. This quickly causes us to run out of lowmem.
Change-Id: I6d502a5f1c20c8a8e44fb5903fcb228f8435a564
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
This patch sets the dma_address field of the sglist representing
an allocation at allocation time. This technically breaks the dma api
which states that these addresses should be set when a particular device
takes ownership of a buffer via the dma_map apis. In the case of our
systems the only dma address space is physical addresses. Additionally,
we can not afford the overhead of calling dma_map_sg from this location
as it implies a cache invalidate that is not necessary if the memory
was previously mapped cached. Instead, the expectation is that memory
being returned from the heaps is ready for dma in that if any cached
mappings of that memory exist they have been invalidated.
Change-Id: Ib3025e80cee52ac0e9d809291e0196a084ea97bd
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Add support for FunctionFS (ffs) to implement usb functions in userspace.
The aliases property stores the list of functions that are implemented
using functionfs.
For example:
echo "adb,mtp" > /sys/class/android_usb/android0/f_ffs/aliases
Then when the function are enabled:
echo "adb,acm" > /sys/class/android_usb/android0/functions
Internally, ffs and acm will be used.
Change-Id: I44117b183d48a5a99ddbee3ef2cf8998be74598e
Signed-off-by: Benoit Goby <benoit@android.com>
At least one map_dma() implementation (EXYNOS_CONTIG) assumes the fields
are filled in
Change-Id: I88c84dc5663df41f9aa9401b5f80fc2570f9dd95
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Product names may contain spaces and scanf %s only matches the 1st word.
Use strlcpy instead.
Change-Id: Ie8703fea9775f7fc17fe615a42597ca3816d36b0
Signed-off-by: Benoit Goby <benoit@android.com>
This patch adds an interface to return and sg_table given a
valid ion handle.
Change-Id: Icd948c60c1af0a4279f337bcd591cd39b46325e8
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Rather than calling map_dma on the allocations dynamically, this patch
switches to creating the sg_table at the time the buffer is created.
This is necessary because in future updates the sg_table will be used
for cache maintenance.
Change-Id: I49aac7c6d3a5afc440d18b917ae0e73be5d3f56d
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
These ops were added in the 3.4 kernel. This patch adds support
for them to ion. Previous ion_map/unmap_kernel api is also
retained in addition to this new api.
Change-Id: I6d2db284dce12c2d8cc4e540865beee2da43bd0c
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
