@@ -53,6 +53,4 @@ menuconfig DMABUF_HEAPS
allows userspace to allocate dma-bufs that can be shared
between drivers.
-source "drivers/dma-buf/heaps/Kconfig"
-
endmenu
deleted file mode 100644
@@ -1,6 +0,0 @@
-config DMABUF_HEAPS_SYSTEM
- bool "DMA-BUF System Heap"
- depends on DMABUF_HEAPS
- help
- Choose this option to enable the system dmabuf heap. The system heap
- is backed by pages from the buddy allocator. If in doubt, say Y.
@@ -1,3 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
obj-y += heap-helpers.o
-obj-$(CONFIG_DMABUF_HEAPS_SYSTEM) += system_heap.o
deleted file mode 100644
@@ -1,124 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DMABUF System heap exporter
- *
- * Copyright (C) 2011 Google, Inc.
- * Copyright (C) 2019 Linaro Ltd.
- */
-
-#include <linux/dma-buf.h>
-#include <linux/dma-mapping.h>
-#include <linux/dma-heap.h>
-#include <linux/err.h>
-#include <linux/highmem.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/sched/signal.h>
-#include <asm/page.h>
-
-#include "heap-helpers.h"
-
-struct dma_heap *sys_heap;
-
-static void system_heap_free(struct heap_helper_buffer *buffer)
-{
- pgoff_t pg;
-
- for (pg = 0; pg < buffer->pagecount; pg++)
- __free_page(buffer->pages[pg]);
- kfree(buffer->pages);
- kfree(buffer);
-}
-
-static int system_heap_allocate(struct dma_heap *heap,
- unsigned long len,
- unsigned long fd_flags,
- unsigned long heap_flags)
-{
- struct heap_helper_buffer *helper_buffer;
- struct dma_buf *dmabuf;
- int ret = -ENOMEM;
- pgoff_t pg;
-
- helper_buffer = kzalloc(sizeof(*helper_buffer), GFP_KERNEL);
- if (!helper_buffer)
- return -ENOMEM;
-
- init_heap_helper_buffer(helper_buffer, system_heap_free);
- helper_buffer->flags = heap_flags;
- helper_buffer->heap = heap;
- helper_buffer->size = len;
-
- helper_buffer->pagecount = len / PAGE_SIZE;
- helper_buffer->pages = kmalloc_array(helper_buffer->pagecount,
- sizeof(*helper_buffer->pages),
- GFP_KERNEL);
- if (!helper_buffer->pages) {
- ret = -ENOMEM;
- goto err0;
- }
-
- for (pg = 0; pg < helper_buffer->pagecount; pg++) {
- /*
- * Avoid trying to allocate memory if the process
- * has been killed by by SIGKILL
- */
- if (fatal_signal_pending(current))
- goto err1;
-
- helper_buffer->pages[pg] = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!helper_buffer->pages[pg])
- goto err1;
- }
-
- /* create the dmabuf */
- dmabuf = heap_helper_export_dmabuf(helper_buffer, fd_flags);
- if (IS_ERR(dmabuf)) {
- ret = PTR_ERR(dmabuf);
- goto err1;
- }
-
- helper_buffer->dmabuf = dmabuf;
-
- ret = dma_buf_fd(dmabuf, fd_flags);
- if (ret < 0) {
- dma_buf_put(dmabuf);
- /* just return, as put will call release and that will free */
- return ret;
- }
-
- return ret;
-
-err1:
- while (pg > 0)
- __free_page(helper_buffer->pages[--pg]);
- kfree(helper_buffer->pages);
-err0:
- kfree(helper_buffer);
-
- return -ENOMEM;
-}
-
-static const struct dma_heap_ops system_heap_ops = {
- .allocate = system_heap_allocate,
-};
-
-static int system_heap_create(void)
-{
- struct dma_heap_export_info exp_info;
- int ret = 0;
-
- exp_info.name = "system_heap";
- exp_info.ops = &system_heap_ops;
- exp_info.priv = NULL;
-
- sys_heap = dma_heap_add(&exp_info);
- if (IS_ERR(sys_heap))
- ret = PTR_ERR(sys_heap);
-
- return ret;
-}
-module_init(system_heap_create);
-MODULE_LICENSE("GPL v2");