20 #include <linux/dma-heap.h>
21 #include <uapi/linux/dma-heap.h>
28  * struct dma_heap - represents a dmabuf heap in the system
30  * @ops:		ops struct for this heap
31  * @heap_devt		heap device node
33  * @heap_cdev		heap char device
35  * Represents a heap of memory from which buffers can be made.
52 static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,  in dma_heap_buffer_alloc()  argument
64 	return heap->ops->allocate(heap, len, fd_flags, heap_flags);  in dma_heap_buffer_alloc()
69 	struct dma_heap *heap;  in dma_heap_open()  local
71 	heap = xa_load(&dma_heap_minors, iminor(inode));  in dma_heap_open()
72 	if (!heap) {  in dma_heap_open()
78 	file->private_data = heap;  in dma_heap_open()
87 	struct dma_heap *heap = file->private_data;  in dma_heap_ioctl_allocate()  local
99 	fd = dma_heap_buffer_alloc(heap, heap_allocation->len,  in dma_heap_ioctl_allocate()
184  * dma_heap_get_drvdata() - get per-subdriver data for the heap
185  * @heap: DMA-Heap to retrieve private data for
188  * The per-subdriver data for the heap.
190 void *dma_heap_get_drvdata(struct dma_heap *heap)  in dma_heap_get_drvdata()  argument
192 	return heap->priv;  in dma_heap_get_drvdata()
196  * dma_heap_get_name() - get heap name
197  * @heap: DMA-Heap to retrieve private data for
200  * The char* for the heap name.
202 const char *dma_heap_get_name(struct dma_heap *heap)  in dma_heap_get_name()  argument
204 	return heap->name;  in dma_heap_get_name()
209 	struct dma_heap *heap, *h, *err_ret;  in dma_heap_add()  local
215 		pr_err("dma_heap: Cannot add heap without a name\n");  in dma_heap_add()
220 		pr_err("dma_heap: Cannot add heap with invalid ops struct\n");  in dma_heap_add()
224 	heap = kzalloc(sizeof(*heap), GFP_KERNEL);  in dma_heap_add()
225 	if (!heap)  in dma_heap_add()
228 	heap->name = exp_info->name;  in dma_heap_add()
229 	heap->ops = exp_info->ops;  in dma_heap_add()
230 	heap->priv = exp_info->priv;  in dma_heap_add()
233 	ret = xa_alloc(&dma_heap_minors, &minor, heap,  in dma_heap_add()
236 		pr_err("dma_heap: Unable to get minor number for heap\n");  in dma_heap_add()
242 	heap->heap_devt = MKDEV(MAJOR(dma_heap_devt), minor);  in dma_heap_add()
244 	cdev_init(&heap->heap_cdev, &dma_heap_fops);  in dma_heap_add()
245 	ret = cdev_add(&heap->heap_cdev, heap->heap_devt, 1);  in dma_heap_add()
254 				heap->heap_devt,  in dma_heap_add()
256 				heap->name);  in dma_heap_add()
268 			pr_err("dma_heap: Already registered heap named %s\n",  in dma_heap_add()
275 	/* Add heap to the list */  in dma_heap_add()
276 	list_add(&heap->list, &heap_list);  in dma_heap_add()
279 	return heap;  in dma_heap_add()
282 	device_destroy(dma_heap_class, heap->heap_devt);  in dma_heap_add()
284 	cdev_del(&heap->heap_cdev);  in dma_heap_add()
288 	kfree(heap);  in dma_heap_add()