diff options
Diffstat (limited to 'drivers/gpu/ion/ion_chunk_heap.c')
| -rw-r--r-- | drivers/gpu/ion/ion_chunk_heap.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/gpu/ion/ion_chunk_heap.c b/drivers/gpu/ion/ion_chunk_heap.c index 7f482b62547..cc824f3a81d 100644 --- a/drivers/gpu/ion/ion_chunk_heap.c +++ b/drivers/gpu/ion/ion_chunk_heap.c @@ -140,6 +140,10 @@ static struct ion_heap_ops chunk_heap_ops = { struct ion_heap *ion_chunk_heap_create(struct ion_platform_heap *heap_data) { struct ion_chunk_heap *chunk_heap; + struct vm_struct *vm_struct; + pgprot_t pgprot = pgprot_writecombine(PAGE_KERNEL); + int i, ret; + chunk_heap = kzalloc(sizeof(struct ion_chunk_heap), GFP_KERNEL); if (!chunk_heap) @@ -149,12 +153,30 @@ struct ion_heap *ion_chunk_heap_create(struct ion_platform_heap *heap_data) chunk_heap->pool = gen_pool_create(get_order(chunk_heap->chunk_size) + PAGE_SHIFT, -1); if (!chunk_heap->pool) { - kfree(chunk_heap); - return ERR_PTR(-ENOMEM); + ret = -ENOMEM; + goto error_gen_pool_create; } chunk_heap->base = heap_data->base; chunk_heap->size = heap_data->size; chunk_heap->allocated = 0; + + vm_struct = get_vm_area(PAGE_SIZE, VM_ALLOC); + if (!vm_struct) { + ret = -ENOMEM; + goto error; + } + for (i = 0; i < chunk_heap->size; i += PAGE_SIZE) { + struct page *page = phys_to_page(chunk_heap->base + i); + struct page **pages = &page; + + ret = map_vm_area(vm_struct, pgprot, &pages); + if (ret) + goto error_map_vm_area; + memset(vm_struct->addr, 0, PAGE_SIZE); + unmap_kernel_range((unsigned long)vm_struct->addr, PAGE_SIZE); + } + free_vm_area(vm_struct); + __dma_page_cpu_to_dev(phys_to_page(heap_data->base), 0, heap_data->size, DMA_BIDIRECTIONAL); gen_pool_add(chunk_heap->pool, chunk_heap->base, heap_data->size, -1); @@ -165,6 +187,14 @@ struct ion_heap *ion_chunk_heap_create(struct ion_platform_heap *heap_data) heap_data->size, heap_data->align); return &chunk_heap->heap; + +error_map_vm_area: + free_vm_area(vm_struct); +error: + gen_pool_destroy(chunk_heap->pool); +error_gen_pool_create: + kfree(chunk_heap); + return ERR_PTR(ret); } void ion_chunk_heap_destroy(struct ion_heap *heap) |