staging: android: ion: Rework heap registration/enumeration

The current model of Ion heap registration  is based on the outdated
model of board files. The replacement for board files (devicetree)
isn't a good replacement for what Ion wants to do. In actuality, Ion
wants to show what memory is available in the system for something else
to figure out what to use. Switch to a model where Ion creates its
device unconditionally and heaps are registed as available regions.
Currently, only system and CMA heaps are converted over to the new
model. Carveout and chunk heaps can be converted over when someone wants
to figure out how.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 19 insertions, 5 deletions

diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c
index e67e78da40d9..dc2a9135c4d0 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -87,7 +87,7 @@ static struct ion_heap_ops ion_cma_ops = {
 	.unmap_kernel = ion_heap_unmap_kernel,
 };
 
-struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *data)
+static struct ion_heap *__ion_cma_heap_create(struct cma *cma)
 {
 	struct ion_cma_heap *cma_heap;
 
@@ -101,14 +101,28 @@ struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *data)
 	 * get device from private heaps data, later it will be
 	 * used to make the link with reserved CMA memory
 	 */
-	cma_heap->cma = data->priv;
+	cma_heap->cma = cma;
 	cma_heap->heap.type = ION_HEAP_TYPE_DMA;
 	return &cma_heap->heap;
 }
 
-void ion_cma_heap_destroy(struct ion_heap *heap)
+int __ion_add_cma_heaps(struct cma *cma, void *data)
 {
-	struct ion_cma_heap *cma_heap = to_cma_heap(heap);
+        struct ion_heap *heap;
+
+	heap = __ion_cma_heap_create(cma);
+	if (IS_ERR(heap))
+		return PTR_ERR(heap);
 
-	kfree(cma_heap);
+	heap->name = cma_get_name(cma);
+
+        ion_device_add_heap(heap);
+        return 0;
+}
+
+static int ion_add_cma_heaps(void)
+{
+	cma_for_each_area(__ion_add_cma_heaps, NULL);
+	return 0;
 }
+device_initcall(ion_add_cma_heaps);