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ANDROID: dma-buf: add dma_heap_try_get_pool_size_kb for vendor hook

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We'd like to get total dma-heap pool size via vendor hooks
such as meminfo_proc_show or show_mem.

Bug: 351175506
Change-Id: I3f7b14a07768f941c91b3e05d8776d4238565e37
Signed-off-by: Sooyong Suk <s.suk@samsung.corp-partner.google.com>
This commit is contained in:
Sooyong Suk 2024-07-04 18:09:48 +09:00 committed by Suren Baghdasaryan
parent d4474bddf8
commit 66c7ba200c
2 changed files with 25 additions and 0 deletions
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18
drivers/dma-buf/dma-heap.c
View File

@ -390,6 +390,24 @@ static char *dma_heap_devnode(const struct device *dev, umode_t *mode)
return kasprintf(GFP_KERNEL, "dma_heap/%s", dev_name(dev));
}
long dma_heap_try_get_pool_size_kb(void)
{
struct dma_heap *heap;
u64 total_pool_size = 0;
if (!mutex_trylock(&heap_list_lock))
return -1;
list_for_each_entry(heap, &heap_list, list) {
if (heap->ops->get_pool_size)
total_pool_size += heap->ops->get_pool_size(heap);
}
mutex_unlock(&heap_list_lock);
return (long)(total_pool_size / 1024);
}
EXPORT_SYMBOL_GPL(dma_heap_try_get_pool_size_kb);
static ssize_t total_pools_kb_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{

7
include/linux/dma-heap.h
View File

@ -121,4 +121,11 @@ void dma_heap_buffer_free(struct dma_buf *);
int dma_heap_bufferfd_alloc(struct dma_heap *heap, size_t len,
u32 fd_flags,
u64 heap_flags);
/**
* dma_heap_try_get_pool_size_kb - Returns total dma-heap pool size in kb
* if there is no lock contention. The pool size will always be 0 if no heaps
* use pools, or do not implement get_pool_size.
**/
long dma_heap_try_get_pool_size_kb(void);
#endif /* _DMA_HEAPS_H */