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[PATCH v3 0/2] dma-buf: Add support for debugfs

by Sumit Semwal

The patch series adds a much-missed support for debugfs to dma-buf framework. Based on the feedback received on v1 of this patch series, support is also added to allow exporters to provide name-strings that will prove useful while debugging. Some more magic can be added for more advanced debugging, but we'll leave that for the time being. Best regards, ~Sumit. --- changes since v2: (based on review comments from Laurent Pinchart) - reordered functions to avoid forward declaration - added __exitcall for dma_buf_deinit() changes since v1: - added patch to replace dma_buf_export() with dma_buf_export_named(), per suggestion from Daniel Vetter. - fixes on init and warnings as reported and corrected by Dave Airlie. - added locking while walking attachment list - reported by Daniel Vetter. Sumit Semwal (2): dma-buf: replace dma_buf_export() with dma_buf_export_named() dma-buf: Add debugfs support Documentation/dma-buf-sharing.txt | 13 ++- drivers/base/dma-buf.c | 170 ++++++++++++++++++++++++++++++++++++- include/linux/dma-buf.h | 16 +++- 3 files changed, 190 insertions(+), 9 deletions(-) -- 1.7.10.4

12 years, 7 months

[PATCH v2 0/2] dma-buf: Add support for debugfs

by Sumit Semwal

12 years, 7 months

[PATCH v10 0/2] Add CMA heap for ION memory manager

by Benjamin Gaignard

The goal of those patches is to allow ION clients (drivers or userland applications) to use Contiguous Memory Allocator (CMA). To get more info about CMA: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-February/001328.html patches version 10: - stop adding private field in ion_heap structure - put ion_heap into struct ion_cma_heap patches version 9: - rebased on Android kernel - make cma heap able to support ION_FLAG_CACHED flag patches version 8: - fix memory leak when release sg_table - remove virt_to_phys from ion_cma_phys patches version 7: - rebased on Android kernel - fix ion Makefile - add ion_cma_map_kernel function - remove CONFIG_CMA compilation flags from ion_heap.c patches version 6: - add private field in ion_platform_heap to pass the device linked with CMA. - rework CMA heap to use private field. - prepare CMA heap for incoming dma_common_get_sgtable function http://lists.linaro.org/pipermail/linaro-mm-sig/2012-June/002109.html - simplify ion-ux500 driver. patches version 5: - port patches on android kernel 3.4 where ION use dmabuf - add ion_cma_heap_map_dma and ion_cma_heap_unmap_dma functions patches version 4: - add ION_HEAP_TYPE_DMA heap type in ion_heap_type enum. - CMA heap is now a "native" ION heap. - add ion_heap_create_full function to keep backward compatibilty. - clean up included files in CMA heap - ux500-ion is using ion_heap_create_full instead of ion_heap_create patches version 3: - add a private field in ion_heap structure instead of expose ion_device structure to all heaps - ion_cma_heap is no more a platform driver - ion_cma_heap use ion_heap private field to store the device pointer and make the link with reserved CMA regions - provide ux500-ion driver and configuration file for snowball board to give an example of how use CMA heaps patches version 2: - fix comments done by Andy Green Benjamin Gaignard (2): gpu: ion: fix ion_platform_data definition gpu: ion: add CMA heap drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 234 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 6 ++ drivers/gpu/ion/ion_priv.h | 14 +++ include/linux/ion.h | 5 +- 5 files changed, 259 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/ion/ion_cma_heap.c -- 1.7.10

12 years, 8 months

[PATCH v9 0/3] Add CMA heap for ION memory manager

by Benjamin Gaignard

The goal of those patches is to allow ION clients (drivers or userland applications) to use Contiguous Memory Allocator (CMA). To get more info about CMA: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-February/001328.html patches version 9: - rebased on Android kernel - make cma heap able to support ION_FLAG_CACHED flag patches version 8: - fix memory leak when release sg_table - remove virt_to_phys from ion_cma_phys patches version 7: - rebased on Android kernel - fix ion Makefile - add ion_cma_map_kernel function - remove CONFIG_CMA compilation flags from ion_heap.c patches version 6: - add private field in ion_platform_heap to pass the device linked with CMA. - rework CMA heap to use private field. - prepare CMA heap for incoming dma_common_get_sgtable function http://lists.linaro.org/pipermail/linaro-mm-sig/2012-June/002109.html - simplify ion-ux500 driver. patches version 5: - port patches on android kernel 3.4 where ION use dmabuf - add ion_cma_heap_map_dma and ion_cma_heap_unmap_dma functions patches version 4: - add ION_HEAP_TYPE_DMA heap type in ion_heap_type enum. - CMA heap is now a "native" ION heap. - add ion_heap_create_full function to keep backward compatibilty. - clean up included files in CMA heap - ux500-ion is using ion_heap_create_full instead of ion_heap_create patches version 3: - add a private field in ion_heap structure instead of expose ion_device structure to all heaps - ion_cma_heap is no more a platform driver - ion_cma_heap use ion_heap private field to store the device pointer and make the link with reserved CMA regions - provide ux500-ion driver and configuration file for snowball board to give an example of how use CMA heaps patches version 2: - fix comments done by Andy Green Benjamin Gaignard (3): gpu: ion: fix ion_platform_data definition gpu: ion: add private field in ion_heap and ion_platform_heap structure gpu: ion: add CMA heap drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 221 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 7 ++ drivers/gpu/ion/ion_priv.h | 16 +++ include/linux/ion.h | 5 +- 5 files changed, 249 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/ion/ion_cma_heap.c -- 1.7.10

12 years, 8 months

[PATCH 0/2] Device Tree support for CMA (Contiguous Memory Allocator)

by Marek Szyprowski

Hello, Here is my initial proposal for device tree integration for Contiguous Memory Allocator. The code is quite straightforward, however I expect that the memory bindings require some discussion. The proposed bindings allows to define contiguous memory regions of specified base address and size. Then, the defined regions can be assigned to the given device(s) by adding a property with a phanle to the defined contiguous memory region. From the device tree perspective that's all. Once the bindings are added, all the memory allocations from dma-mapping subsystem will be served from the defined contiguous memory regions. Contiguous Memory Allocator is a framework, which lets to provide a large contiguous memory buffers for (usually a multimedia) devices. The contiguous memory is reserved during early boot and then shared with kernel, which is allowed to allocate it for movable pages. Then, when device driver requests a contigouous buffer, the framework migrates movable pages out of contiguous region and gives it to the driver. When device driver frees the buffer, it is added to kernel memory pool again. For more information, please refer to commit c64be2bb1c6eb43c838b2c6d57 ("drivers: add Contiguous Memory Allocator") and d484864dd96e1830e76895 (CMA merge commit). Best regards Marek Szyprowski Samsung Poland R&D Center Patch summary: Marek Szyprowski (2): drivers: dma-contiguous: clean source code and prepare for device tree drivers: dma-contiguous: add initialization from device tree Documentation/devicetree/bindings/memory.txt | 101 ++++++++++ arch/arm/boot/dts/skeleton.dtsi | 7 +- drivers/base/dma-contiguous.c | 278 +++++++++++++++++++------- include/asm-generic/dma-contiguous.h | 4 +- include/linux/dma-contiguous.h | 32 ++- 5 files changed, 338 insertions(+), 84 deletions(-) create mode 100644 Documentation/devicetree/bindings/memory.txt -- 1.7.9.5

12 years, 8 months

lists.linaro.org maintenance completed

by IT Services

This is to let you know that the migration of lists.linaro.org has been successfully completed. As per the email I sent on Wednesday, it may take some time for the new address of the server to be seen by your computer. You can check this by trying to connect to the web site: http://lists.linaro.org/ If you are able to connect and you do not get an error, this means you are connecting to the new server and you can send email to the lists. If you experience any problems after the weekend and you find that you still cannot connect to the server, please reply to this email to let us know. Regards Philip IT Services Manager Linaro

12 years, 8 months

Planned maintenance - lists.linaro.org

by IT Services

Hello You are receiving this email because you are subscribed to one or more mailing lists provided by the lists.linaro.org server. IT Services are announcing planned maintenance for this server scheduled for *Friday 15th March 2013, starting at 2pm GMT*. The purpose of the work is to move the service to another server. There will be some disruption during this maintenance. In order to ensure that you do not accidentally try to use the service while it is being moved, the current server will be shut down at 2pm. A further email will be sent on Friday afternoon to confirm that the migration of the service is completed. However, due to the way servers are found, it may take a while before your computer is able to connect to the relocated service. After the old server has been shut down, email sent to any of the lists will be queued, but it is possible that the sending server will still trying to deliver the email to the old server rather than the new one when it is started. It is therefore *strongly* recommended that you do not send any email to an @lists.linaro.org email address until you can connect to the new service, which you will be able to test by trying to use a web browser to connect to http://lists.linaro.org after you receive the email confirming that the migration has been completed. Since the old service will be shut down, if you are able to connect, you can be sure you have connected to the new service. If by Monday you are still unable to connect to the service or you are not able to send email to an @lists.linaro.org email address, please send an email to its(a)linaro.org. Thank you. Regards Philip IT Services Manager Linaro

12 years, 8 months

[PATCH] ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation

by Marek Szyprowski

Atomic pool should always be allocated from DMA zone if such zone is available in the system to avoid issues caused by limited dma mask of any of the devices used for making an atomic allocation. Reported-by: Krzysztof Halasa <khc(a)pm.waw.pl> Signed-off-by: Marek Szyprowski <m.szyprowski(a)samsung.com> --- arch/arm/mm/dma-mapping.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index c7e3759..e9db6b4 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -342,6 +342,7 @@ static int __init atomic_pool_init(void) { struct dma_pool *pool = &atomic_pool; pgprot_t prot = pgprot_dmacoherent(pgprot_kernel); + gfp_t gfp = GFP_KERNEL | GFP_DMA; unsigned long nr_pages = pool->size >> PAGE_SHIFT; unsigned long *bitmap; struct page *page; @@ -361,8 +362,8 @@ static int __init atomic_pool_init(void) ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page, atomic_pool_init); else - ptr = __alloc_remap_buffer(NULL, pool->size, GFP_KERNEL, prot, - &page, atomic_pool_init); + ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page, + atomic_pool_init); if (ptr) { int i; -- 1.7.9.5

12 years, 8 months

[PATCH] gpu: ion: Copy name string in client and heap create functions

by Johan Mossberg

ion_client_create and ion_heap_create assumes the caller will keep the name string valid forever. In my opinion this is not the expected behavior, it also makes it difficult to have dynamically created names. Signed-off-by: Johan Mossberg <johan.mossberg(a)stericsson.com> --- drivers/gpu/ion/ion.c | 11 +++++++---- drivers/gpu/ion/ion_heap.c | 3 ++- drivers/gpu/ion/ion_priv.h | 4 +++- 3 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c index 8fd61b3..b0ad01b 100644 --- a/drivers/gpu/ion/ion.c +++ b/drivers/gpu/ion/ion.c @@ -57,6 +57,8 @@ struct ion_device { struct dentry *debug_root; }; +#define CLIENT_NAME_LEN 16 + /** * struct ion_client - a process/hw block local address space * @node: node in the tree of all clients @@ -75,7 +77,7 @@ struct ion_client { struct ion_device *dev; struct rb_root handles; struct mutex lock; - const char *name; + char name[CLIENT_NAME_LEN]; struct task_struct *task; pid_t pid; struct dentry *debug_root; @@ -598,14 +600,14 @@ static int ion_debug_client_show(struct seq_file *s, void *unused) names[id] = handle->buffer->heap->name; sizes[id] += handle->buffer->size; } - mutex_unlock(&client->lock); - seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes"); for (i = 0; i < ION_NUM_HEAP_IDS; i++) { if (!names[i]) continue; seq_printf(s, "%16.16s: %16u\n", names[i], sizes[i]); } + mutex_unlock(&client->lock); + return 0; } @@ -655,7 +657,8 @@ struct ion_client *ion_client_create(struct ion_device *dev, client->dev = dev; client->handles = RB_ROOT; mutex_init(&client->lock); - client->name = name; + strncpy(client->name, name, CLIENT_NAME_LEN); + client->name[CLIENT_NAME_LEN - 1] = '\0'; client->task = task; client->pid = pid; diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c index 225ef94..96dd70b 100644 --- a/drivers/gpu/ion/ion_heap.c +++ b/drivers/gpu/ion/ion_heap.c @@ -160,7 +160,8 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) return ERR_PTR(-EINVAL); } - heap->name = heap_data->name; + strncpy(heap->name, heap_data->name, HEAP_NAME_LEN); + heap->name[HEAP_NAME_LEN - 1] = '\0'; heap->id = heap_data->id; return heap; } diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h index c116921..3296ba4 100644 --- a/drivers/gpu/ion/ion_priv.h +++ b/drivers/gpu/ion/ion_priv.h @@ -107,6 +107,8 @@ struct ion_heap_ops { struct vm_area_struct *vma); }; +#define HEAP_NAME_LEN 16 + /** * struct ion_heap - represents a heap in the system * @node: rb node to put the heap on the device's tree of heaps @@ -131,7 +133,7 @@ struct ion_heap { enum ion_heap_type type; struct ion_heap_ops *ops; unsigned int id; - const char *name; + char name[HEAP_NAME_LEN]; int (*debug_show)(struct ion_heap *heap, struct seq_file *, void *); }; -- 1.7.4.3

12 years, 8 months

[RFC][PATCH 00/30] staging: Android sync driver

by John Stultz

As proposed yesterday, here's the Android sync driver patches for staging. I've preserved the commit history, but moved all the changes over to be against the staging directory (instead of drivers/base). The goal of submitting this driver to staging is to try to get more collaberation, as there are some similar efforts going on in the community with dmabuf-fences. My email from yesterday with more details for how I hope this goes is here: http://comments.gmane.org/gmane.linux.kernel/1448420 Erik also provided a nice background on the patch set in his reply yesterday, which I'll quote here: "In Honeycomb where we introduced the Hardware Composer HAL. This is a userspace layer that allows composition acceleration on a per platform basis. Different SoC vendors have implemented this using overlays, 2d blitters, a combinations of both, or other clever/disgusting means. Along with the HWC we consolidated a lot of our camera and media pipeline to allow their input to be fed into the GPU or display(overlay.) In order to exploit parallelism the the graphics pipeline, this introduced lots of implicit synchronization dependancies. After a couple years of working with many different SoC vendors, we found that it was really difficult to communicate our system's expectations of the implicit contract and it was difficult for the SoC vendors to properly implement the implicit contract in each of their IP blocks (display, gpu, camera, video codecs). It was also incredibly difficult to debug when problems/deadlocks arose. In an effort to clean up the situation we decided to create set of simple synchronization primitives and have our compositor (SurfaceFlinger) manage the synchronization contract explicitly. We designed these primitives so that they can be passed across processes (much like ion/dma_buf handles), can be backed by hardware synchronization primitives, and can be combined with other sync dependancies in a heterogeneous manner. We also added enough debugging information to make pinpointing a synchronization deadlock bug easier. There are also OpenGL extensions added (which I believe have been ratified by Khronos) to convert a "native" sync object to a gl fence object and vise versa. So far shipped this system on two products (the Nexus 10 and 4) with two different SoCs (Samsung Exynos5250 and Qualcomm MSM8064.) These two projects were much easier to work out the kinks in the graphics/compositing pipelines. In addition we were able to use the telemetry and tracing features to track down the causes of dropped frames aka "jank." As for the implementation, I started with having the main driver op primitive be a wait() op. I quickly noticed that most of the tricky race condition prone code was ending up in the drivers wait() op. It also made handling asynchronous waits of more than one type of sync_pt difficult to manage. In the end I opted for something roughly like poll() where all the heavy lifting is done at the high level and the drivers only need to implement a simple check function." Anyway, let me know what you think of the patches, and hopefully this is something that could be considered for staging for 3.10 thanks -john Cc: Maarten Lankhorst <maarten.lankhorst(a)canonical.com> Cc: Erik Gilling <konkers(a)android.com> Cc: Daniel Vetter <daniel.vetter(a)ffwll.ch> Cc: Rob Clark <robclark(a)gmail.com> Cc: Sumit Semwal <sumit.semwal(a)linaro.org> Cc: Greg KH <gregkh(a)linuxfoundation.org> Cc: dri-devel(a)lists.freedesktop.org Cc: linaro-mm-sig(a)lists.linaro.org Cc: Android Kernel Team <kernel-team(a)android.com> Erik Gilling (26): staging: sync: Add synchronization framework staging: sw_sync: Add cpu based sync driver staging: sync: Add timestamps to sync_pts staging: sync: Add debugfs support staging: sw_sync: Add debug support staging: sync: Add ioctl to get fence data staging: sw_sync: Add fill_driver_data support staging: sync: Add poll support staging: sync: Allow async waits to be canceled staging: sync: Export sync API symbols staging: sw_sync: Export sw_sync API staging: sync: Reorder sync_fence_release staging: sync: Optimize fence merges staging: sync: Add internal refcounting to fences staging: sync: Add reference counting to timelines staging: sync: Change wait timeout to mirror poll semantics staging: sync: Dump sync state to console on timeout staging: sync: Improve timeout dump messages staging: sync: Dump sync state on fence errors staging: sync: Protect unlocked access to fence status staging: sync: Update new fence status with sync_fence_signal_pt staging: sync: Use proper barriers when waiting indefinitely staging: sync: Refactor sync debug printing staging: sw_sync: Convert to use new value_str debug ops staging: sync: Add tracepoint support staging: sync: Don't log wait timeouts when timeout = 0 Jamie Gennis (1): staging: sync: Fix timeout = 0 wait behavior Rebecca Schultz Zavin (2): staging: sync: Fix error paths staging: sw_sync: Fix error paths Ørjan Eide (1): staging: sync: Fix race condition between merge and signal drivers/staging/android/Kconfig | 27 + drivers/staging/android/Makefile | 2 + drivers/staging/android/sw_sync.c | 263 +++++++++ drivers/staging/android/sw_sync.h | 58 ++ drivers/staging/android/sync.c | 1016 ++++++++++++++++++++++++++++++++++ drivers/staging/android/sync.h | 426 ++++++++++++++ drivers/staging/android/trace/sync.h | 82 +++ 7 files changed, 1874 insertions(+) create mode 100644 drivers/staging/android/sw_sync.c create mode 100644 drivers/staging/android/sw_sync.h create mode 100644 drivers/staging/android/sync.c create mode 100644 drivers/staging/android/sync.h create mode 100644 drivers/staging/android/trace/sync.h -- 1.7.10.4

12 years, 8 months

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