- 08 Feb, 2016 40 commits
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Spencer E. Olson authored
This change enables the mite DMA controller to only transfer the amount of data needed by a command. By default, the old behavior of transferring the entire comedi DMA data buffer is still in effect. These changes allow a command to only transmit a limited portion of that data buffer as needed. This patch begins to reinterprets stop_arg when stop_src == TRIG_NONE to allow the user to specify the length of the buffer that should be repeated. The intent is to allow a user to have a specific buffer repeated as-is indefinitely. The contents of the DMA buffer can be left static or changed by the user via mmap access to the DMA buffer. If the contents are changed by the user, additional munging is not performed by the driver and only a single call to comedi_mark_buffer_written should be done. Signed-off-by:
Spencer E. Olson <olsonse@umich.edu> Reviewed-by:
Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Spencer E. Olson authored
Generally, the CR_CHAN macro is/should be used to access the relevant bits for channel identification in cmd->*_arg when the corresponding cmd->*_src==TRIG_EXT, including cmd->convert_arg in this case. This patch does not fix a bug per se, as NISTC_AI_MODE1_CONVERT_SRC() already masks the value sufficiently, but using CR_CHAN() here makes the code clearer as it avoids passing some irrelevant bits to NISTC_AI_MODE1_CONVERT_SRC() in the first place. Signed-off-by:
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Spencer E. Olson authored
This fixes a bug in function ni_tio_input_inttrig(). The trigger number should be compared to cmd->start_arg, not cmd->start_src. Fixes: 6a760394 ("staging: comedi: ni_tiocmd: clarify the cmd->start_arg validation and use") Cc: <stable@vger.kernel.org> # 3.17+ Signed-off-by:
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Spencer E. Olson authored
Signed-off-by:
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Bhaktipriya Shridhar authored
As suggested by checkpatch.pl, this patch replaces bit shifting on 1 with the BIT(x) macro. Signed-off-by:
Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Reviewed-by:
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Neil Zhang authored
There are race condition B/T ion_client_destroy and debugfs callbacks. Let's use a mutex to synchronize them. Signed-off-by:
Neil Zhang <neilzhang1123@hotmail.com> Signed-off-by:
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Rohit kumar authored
Currently we can only import dma buf fd's to get ion_handle. Adding support to import dma buf handles to support kernel specific use cases. An example use case is in linux platforms such as Tizen, in which DRM-GEM is used for buffer management for graphics. It has gem_handle corresponding to a buffer and uses gem_name for sharing the buffer with other processes. However,it also uses dma_buf fd for 3d operations. For wayland, there are multiple calls for gem_handle to dma_buf fd conversion. So, we store dma_buf associated with buffer. But, there is no api for getting ion_handle from dma_buf. This patch exposes api to retrieve the ion handle from dma_buf for similar use cases. With this patch, we can integrate ION within DRM-GEM for buffer management and dma_buf sharing. Signed-off-by:
Rohit kumar <rohit.kr@samsung.com> Reviewed-by:
Laura Abbott <labbott@redhat.com> Reviewed-by:
Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by:
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Gustavo Padovan authored
After removing driver_data struct sync_fence_info has now a fixed size, thus it doesn't need any field to tell its size, it is already known. Signed-off-by:
Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by:
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Gustavo Padovan authored
It is unclear in what situations driver_data should be used thus better do not upstream it for now. If a need arises in the future a discussion can be started to re-add it. Signed-off-by:
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Gustavo Padovan authored
info_data is a bit redundant, let's keep it as only sync_file_info. It is also smaller. Signed-off-by:
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Gustavo Padovan authored
As struct sync_pt doesn't exist anymore it is a good idea remove any reference to it in the sync_framework. sync_pts were replaced directly by fences and here we rename it to sync_fence_info to let the fence namespace clean. v2: rename fence_info to sync_fence_info (Maarten) Signed-off-by:
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Gustavo Padovan authored
This ioctl is replicating the work of poll() syscall so let's take the opportunity that this is still on staging tree and remove the duplication and force new users to use the poll() standard interface. Signed-off-by:
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Ben Marsh authored
This is a patch to ion_page_pool.c that changes a memory allocation style issue as found by checkpatch.pl. Signed-off-by:
Ben Marsh <bmarsh94@gmail.com> Signed-off-by:
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Gustavo Padovan authored
With the removal of struct sync_pt sync_fence_create_dma() now takes the same arguments as sync_fence_create() so let's keep only sync_fence_create(). Signed-off-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by:
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Gustavo Padovan authored
All changes to timeline value come through the user via sync_timeline_signal() calls. When sync_timeline_destroy() is called no changes on timeline->value happens hence call sync_timeline_signal() with no increment is pointless. Signed-off-by:
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Gustavo Padovan authored
signaled_pts is not used in this function. Signed-off-by:
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Gustavo Padovan authored
struct sync_pt was just wrapping around struct fence and creating an extra abstraction layer. The only two members of struct sync_pt, child_list and active_list, were moved to struct fence in an earlier commit. After removing those two members struct sync_pt is nothing more than struct fence, so remove it all and use struct fence directly. Signed-off-by:
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Gustavo Padovan authored
'sync_pt' is actually declared as struct fence so to make the name means its type we rename it to 'fence'. Signed-off-by:
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Gustavo Padovan authored
sync_file has a more close meaning to what a sync_fence really, a struct that represent a file that can be used by userspace to get information on a fence, or wait for it to be signaled. Signed-off-by:
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Gustavo Padovan authored
This remove CONFIG_SW_SYNC_USER and instead compile the sw_sync file into debugpfs under <debugfs>/sync/sw_sync. Signed-off-by:
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Gustavo Padovan authored
Creates the 'sync' dir on debugfs root dir and move the 'sync' file to sync/info. This is the preparation to add more debug info and control. Signed-off-by:
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Gustavo Padovan authored
.dup and .compare are not used by the sync framework, so remove them from sw_sync. Signed-off-by:
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Gustavo Padovan authored
These interfaces are not used nor have plans to be used in the near future so remove them for a cleaner solution before de-staging the sync framework. Signed-off-by:
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Gustavo Padovan authored
Updates comments about functions and structures. Signed-off-by:
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Chen Feng authored
Sanity check at binder ioctl function, Only allow the shared mm_struct to use the same binder-object to do binder operate. And add proc->vma_vm_mm = current->mm at the open function. The libbinder do ioctl before mmap called. V2: Fix compile error for error commit V3: Change the condition to proc->vma_vm_mm Signed-off-by:
Chen Feng <puck.chen@hisilicon.com> Signed-off-by:
Wei Dong <weidong2@hisilicon.com> Signed-off-by:
Junmin Zhao <zhaojunmin@huawei.com> Reviewed-by:
Zhuangluan Su <suzhuangluan@hisilicon.com> Signed-off-by:
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Liviu Dudau authored
ion_buffer_create() will allocate a buffer and then create a DMA mapping for it, but it forgot to set the length of the page entries. Signed-off-by:
Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by:
Jon Medhurst <tixy@linaro.org> Acked-by:
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Chen Feng authored
Since ion alloc can be called by userspace,eg gralloc. When it is called frequently, the efficiency of kswapd is to low. And the reclaimed memory is too lower. In this way, the kswapd can use to much cpu resources. With 3.5GB DMA Zone and 0.5 Normal Zone. pgsteal_kswapd_dma 9364140 pgsteal_kswapd_normal 7071043 pgscan_kswapd_dma 10428250 pgscan_kswapd_normal 37840094 With this change the reclaim ratio has greatly improved 18.9% -> 72.5% Signed-off-by:
Lu bing <albert.lubing@hisilicon.com> Reviewed-by:
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Bopamo Osaisai authored
This is a patch to the sync_debug.c file that rectifies a brace warning that was found with the checkpatch.pl tool Signed-off-by:
Bopamo Osaisai <bopamo@gmail.com> Signed-off-by:
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Rajmal Menariya authored
In carveout heap, change minimum allocation order from 12 to PAGE_SHIFT. After this change each bit in bitmap (genalloc - General purpose special memory pool) represents one page size memory. Cc: sprd-ind-kernel-group@googlegroups.com Cc: sanjeev.yadav@spreadtrum.com Cc: Colin Cross <ccross@android.com> Cc: Android Kernel Team <kernel-team@android.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by:
Rajmal Menariya <rajmal.menariya@spreadtrum.com> [jstultz: Reworked commit message] Signed-off-by:
John Stultz <john.stultz@linaro.org> Acked-by:
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Colin Cross authored
lowmemorykiller debug messages are inscrutable and mostly useful for debugging the lowmemorykiller, not explaining why a process was killed. Make the messages more useful by prefixing them with "lowmemorykiller: " and explaining in more readable terms what was killed, who it was killed for, and why it was killed. The messages now look like: [ 76.997631] lowmemorykiller: Killing 'droid.gallery3d' (2172), adj 1000, [ 76.997635] to free 27436kB on behalf of 'kswapd0' (29) because [ 76.997638] cache 122624kB is below limit 122880kB for oom_score_adj 1000 [ 76.997641] Free memory is -53356kB above reserved A negative number for free memory above reserved means some of the reserved memory has been used and is being regenerated by kswapd, which is likely what called the shrinkers. Cc: Android Kernel Team <kernel-team@android.com> Cc: Greg KH <gregkh@linuxfoundation.org> Signed-off-by:
Colin Cross <ccross@android.com> [jstultz: Minor checkpatch tweaks] Signed-off-by:
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Rom Lemarchand authored
Include <linux/types.h> into ashmem.h to ensure referenced types are defined Cc: Android Kernel Team <kernel-team@android.com> Cc: Greg KH <gregkh@linuxfoundation.org> Signed-off-by:
Rom Lemarchand <romlem@android.com> [jstultz: Minor commit message tweaks] Signed-off-by:
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Laura Abbott authored
Both ashmem_mmap and ashmem_shrink take the ashmem_lock. It may be possible for ashmem_mmap to invoke ashmem_shrink: -000|mutex_lock(lock = 0x0) -001|ashmem_shrink(?, sc = 0x0) <--- try to take ashmem_mutex again -002|shrink_slab(shrink = 0xDA5F1CC0, nr_pages_scanned = 0, lru_pages -002|= -002|124) -003|try_to_free_pages(zonelist = 0x0, ?, ?, ?) -004|__alloc_pages_nodemask(gfp_mask = 21200, order = 1, zonelist = -004|0xC11D0940, -005|new_slab(s = 0xE4841E80, ?, node = -1) -006|__slab_alloc.isra.43.constprop.50(s = 0xE4841E80, gfpflags = -006|2148925462, ad -007|kmem_cache_alloc(s = 0xE4841E80, gfpflags = 208) -008|shmem_alloc_inode(?) -009|alloc_inode(sb = 0xE480E800) -010|new_inode_pseudo(?) -011|new_inode(?) -012|shmem_get_inode(sb = 0xE480E800, dir = 0x0, ?, dev = 0, flags = -012|187) -013|shmem_file_setup(?, ?, flags = 187) -014|ashmem_mmap(?, vma = 0xC5D64210) <---- Acquire ashmem_mutex -015|mmap_region(file = 0xDF8E2C00, addr = 1772974080, len = 233472, -015|flags = 57, -016|sys_mmap_pgoff(addr = 0, len = 230400, prot = 3, flags = 1, fd = -016|157, pgoff -017|ret_fast_syscall(asm) -->|exception -018|NUR:0x40097508(asm) ---|end of frame Avoid this deadlock by using mutex_trylock in ashmem_shrink; if the mutex is already held, do not attempt to shrink. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Android Kernel Team <kernel-team@android.com> Reported-by:
Matt Wagantall <mattw@codeaurora.org> Reported-by:
Syed Rameez Mustafa <rameezmustafa@codeaurora.org> Reported-by:
Osvaldo Banuelos <osvaldob@codeaurora.org> Reported-by:
Subbaraman Narayanamurthy <subbaram@codeaurora.org> Signed-off-by:
Laura Abbott <lauraa@codeaurora.org> [jstultz: Minor commit message tweaks] Signed-off-by:
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Hugo Camboulive authored
This removes a few Sparse warnings. Signed-off-by:
Hugo Camboulive <hugo.camboulive@gmail.com> Signed-off-by:
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Hari Prasath Gujulan Elango authored
Replace multiple if..else if..statements with simple table lookup in two functions. Signed-off-by:
Hari Prasath Gujulan Elango <hgujulan@visteon.com> Signed-off-by:
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Sudip Mukherjee authored
device_create() returns ERR_PTR on error, it does not return NULL. Signed-off-by:
Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by:
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Christian Gromm authored
This patch removes the second forwared declaration of struct most_aim. Signed-off-by:
Christian Gromm <christian.gromm@microchip.com> Signed-off-by:
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Christian Gromm authored
This patch adds a counter for dropped packets. It needed for statistical analysis. Signed-off-by:
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Christian Gromm authored
This patch straightens and rearranges the code of function aim_write() of module aim-cdev. Signed-off-by:
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Christian Gromm authored
This patch makes use of kfifo_peek and kfifo_skip, which renders the variable stacked_mbo useless. It is therefore removed. Signed-off-by:
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Christian Gromm authored
This patch changes the type of the access reference from atomit_t to int. It is needed, because the reference variable is secured by synchronization locks and does not need to be atomic anymore. Signed-off-by:
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