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Just some simple cleanups to address whitespace issues and
other issues found w/ checkpatch.
Change-Id: I181444505627894b8f3bbf59192703b0f65736ee
Signed-off-by: John Stultz <john.stultz@linaro.org>
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Add ion_heap_pages_zero for ion heaps to use to zero pages
during initialization or allocation, when a struct ion_buffer
may not be available. Use it from the chunk heap and carveout
heaps.
Change-Id: Ic6c921943a8820cf9896da5164f2d9794d0fe91f
Signed-off-by: Colin Cross <ccross@android.com>
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Fix sparse warnings in ion.
Change-Id: Icbadf2ca53bea20914f608f619568629c178eae3
Signed-off-by: Colin Cross <ccross@android.com>
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Now that ion_vm_fault doesn't need a struct page with a nonzero
refcount, there is no need allocate heap memory for cached pages using
split_page. Remove the ion_heap_alloc_pages and ion_heap_free_pages
helpers in favor of direct calls to alloc_pages and __free_pages,
and remove the special handling in the system heap.
Change-Id: I5966a798f48df2d56642e662a69c1495944f6509
Signed-off-by: Colin Cross <ccross@android.com>
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Check the return value of remap_pfn_range and return an error if
it fails.
Change-Id: I206cf95a24607ebe1c80274e3ed15cc7c076d007
Signed-off-by: Colin Cross <ccross@android.com>
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ion_heap_buffer_zero can spend a long time in unmap_kernel_range
if it has to broadcast a tlb flush to every cpu for every page.
Modify it to batch pages into a larger region to clear using a
single mapping. This may cause the mapping size to change if
the buffer size is not a multiple of the mapping size, so
switch to allocating the address space for each chunk. This
allows us to use vm_map_ram to handle the allocation and mapping
together.
The number of pages to zero using a single mapping is set to 32
to hit the fastpath in vm_map_ram.
Change-Id: I1accfe67b285cbc9e95e387bea4246864197827d
Signed-off-by: Colin Cross <ccross@android.com>
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The `buffer' variable is being used after being freed. Fix this.
Change-Id: Iea3471fa7dc7535bbf0620c1639fea2008d7cf19
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
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Use %z for size_t and %pa for dma_addr_t to avoid warnings in printks.
Change-Id: I2c72874acd0b69cb35fca691928783817deb9394
Signed-off-by: Colin Cross <ccross@android.com>
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ion is always dealing with the allocation and not the mapping,
so it should always be using sg->length and not sg->dma_length.
Change-Id: Id9b07f1196b2bafe04636fa1aa46dfc84d003cf0
Signed-off-by: Colin Cross <ccross@android.com>
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Move ion from drivers/gpu/ion to drivers/android/staging/ion.
Change-Id: Id6e996aa3954cbb8e1a8abc9578a56204f5eb211
Signed-off-by: Colin Cross <ccross@android.com>
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