user/sven/linux.git/drivers/base/dma-buf.c, branch v3.10.97

dma-buf: Add debugfs support

2013-05-01T11:06:22Z

Add debugfs support to make it easier to print debug information about the dma-buf buffers. Cc: Dave Airlie [minor fixes on init and warning fix] Cc: Dan Carpenter [remove double unlock in fail case] Signed-off-by: Sumit Semwal

dma-buf: replace dma_buf_export() with dma_buf_export_named()

2013-05-01T11:05:36Z

For debugging purposes, it is useful to have a name-string added while exporting buffers. Hence, dma_buf_export() is replaced with dma_buf_export_named(), which additionally takes 'exp_name' as a parameter. For backward compatibility, and for lazy exporters who don't wish to name themselves, a #define dma_buf_export() is also made available, which adds a __FILE__ instead of 'exp_name'. Cc: Daniel Vetter [Thanks for the idea!] Reviewed-by: Daniel Vetter Signed-off-by: Sumit Semwal

CHROMIUM: dma-buf: restore args on failure of dma_buf_mmap

2013-02-27T09:44:02Z

Callers to dma_buf_mmap expect to fput() the vma struct's vm_file themselves on failure. Not restoring the struct's data on failure causes a double-decrement of the vm_file's refcount. Signed-off-by: John Sheu Reviewed-by: Daniel Vetter Signed-off-by: Sumit Semwal

dma-buf: implement vmap refcounting in the interface logic

2013-02-27T09:43:36Z

All drivers which implement this need to have some sort of refcount to allow concurrent vmap usage. Hence implement this in the dma-buf core. To protect against concurrent calls we need a lock, which potentially causes new funny locking inversions. But this shouldn't be a problem for exporters with statically allocated backing storage, and more dynamic drivers have decent issues already anyway. Inspired by some refactoring patches from Aaron Plattner, who implemented the same idea, but only for drm/prime drivers. v2: Check in dma_buf_release that no dangling vmaps are left. Suggested by Aaron Plattner. We might want to do similar checks for attachments, but that's for another patch. Also fix up ERR_PTR return for vmap. v3: Check whether the passed-in vmap address matches with the cached one for vunmap. Eventually we might want to remove that parameter - compared to the kmap functions there's no need for the vaddr for unmapping. Suggested by Chris Wilson. v4: Fix a brown-paper-bag bug spotted by Aaron Plattner. Cc: Aaron Plattner Reviewed-by: Aaron Plattner Tested-by: Aaron Plattner Reviewed-by: Rob Clark Signed-off-by: Daniel Vetter Signed-off-by: Sumit Semwal

dma_buf: Cleanup dma_buf_fd

2013-01-17T20:57:07Z

Remove redundant 'error' variable. Signed-off-by: Borislav Petkov Signed-off-by: Greg Kroah-Hartman

dma-buf: might_sleep() in dma_buf_unmap_attachment()

2012-12-20T06:35:05Z

We never really clarified if unmap could be done in atomic context. But since mapping might require sleeping, this implies mutex in use to synchronize mapping/unmapping, so unmap could sleep as well. Add a might_sleep() to clarify this. Signed-off-by: Rob Clark Acked-by: Daniel Vetter Reviewed-by: Maarten Lankhorst Signed-off-by: Sumit Semwal

make get_file() return its argument

2012-09-27T01:10:25Z

simplifies a bunch of callers... Signed-off-by: Al Viro

driver core: fix some kernel-doc warnings in dma*.c

2012-06-15T00:15:26Z

Fix kernel-doc warnings in drivers/base/dma*.c: Warning(drivers/base/dma-buf.c:498): No description found for parameter 'vaddr' Warning(drivers/base/dma-coherent.c:199): No description found for parameter 'ret' Signed-off-by: Randy Dunlap Signed-off-by: Greg Kroah-Hartman

Merge tag 'tag-for-linus-3.5' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf

2012-05-25T16:37:26Z

Pull dma-buf updates from Sumit Semwal: "Here's the first signed-tag pull request for dma-buf framework. It includes the following key items: - mmap support - vmap support - related documentation updates These are needed by various drivers to allow mmap/vmap of dma-buf shared buffers. Dave Airlie has some prime patches dependent on the vmap pull as well." * tag 'tag-for-linus-3.5' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf: dma-buf: add initial vmap documentation dma-buf: minor documentation fixes. dma-buf: add vmap interface dma-buf: mmap support

dma-buf: minor documentation fixes.

2012-05-25T07:16:23Z

Some minor inline documentation fixes for gaps resulting from new patches. Signed-off-by: Sumit Semwal Signed-off-by: Sumit Semwal