Revert "dma-buf: Add dma-buf heaps framework"

This reverts commit a69b0e855d3fd278ff6f09a23e1edf929538e304.

This patchset doesn't meet the UAPI requirements set out in [1] for the DRM
subsystem. Once the userspace component is reviewed and ready for merge
we can try again.

[1]- https://01.org/linuxgraphics/gfx-docs/drm/gpu/drm-uapi.html#open-source-userspace-requirements

Fixes: a69b0e855d3f ("dma-buf: Add dma-buf heaps framework")
Cc: Laura Abbott <labbott@redhat.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Liam Mark <lmark@codeaurora.org>
Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Brian Starkey <Brian.Starkey@arm.com>
Cc: Vincent Donnefort <Vincent.Donnefort@arm.com>
Cc: Sudipto Paul <Sudipto.Paul@arm.com>
Cc: Andrew F. Davis <afd@ti.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chenbo Feng <fengc@google.com>
Cc: Alistair Strachan <astrachan@google.com>
Cc: Hridya Valsaraju <hridya@google.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: dri-devel@lists.freedesktop.org
Cc: Brian Starkey <brian.starkey@arm.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: "Andrew F. Davis" <afd@ti.com>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Acked-by: David Airlie <airlied@linux.ie>
Signed-off-by: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20191030203003.101156-6-sean@poorly.run

2 files changed, 0 insertions, 114 deletions

diff --git a/include/linux/dma-heap.h b/include/linux/dma-heap.h
deleted file mode 100644
index 454e354d1ffb..000000000000
--- a/include/linux/dma-heap.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * DMABUF Heaps Allocation Infrastructure
- *
- * Copyright (C) 2011 Google, Inc.
- * Copyright (C) 2019 Linaro Ltd.
- */
-
-#ifndef _DMA_HEAPS_H
-#define _DMA_HEAPS_H
-
-#include <linux/cdev.h>
-#include <linux/types.h>
-
-struct dma_heap;
-
-/**
- * struct dma_heap_ops - ops to operate on a given heap
- * @allocate:		allocate dmabuf and return fd
- *
- * allocate returns dmabuf fd  on success, -errno on error.
- */
-struct dma_heap_ops {
-	int (*allocate)(struct dma_heap *heap,
-			unsigned long len,
-			unsigned long fd_flags,
-			unsigned long heap_flags);
-};
-
-/**
- * struct dma_heap_export_info - information needed to export a new dmabuf heap
- * @name:	used for debugging/device-node name
- * @ops:	ops struct for this heap
- * @priv:	heap exporter private data
- *
- * Information needed to export a new dmabuf heap.
- */
-struct dma_heap_export_info {
-	const char *name;
-	const struct dma_heap_ops *ops;
-	void *priv;
-};
-
-/**
- * dma_heap_get_drvdata() - get per-heap driver data
- * @heap: DMA-Heap to retrieve private data for
- *
- * Returns:
- * The per-heap data for the heap.
- */
-void *dma_heap_get_drvdata(struct dma_heap *heap);
-
-/**
- * dma_heap_add - adds a heap to dmabuf heaps
- * @exp_info:		information needed to register this heap
- */
-struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info);
-
-#endif /* _DMA_HEAPS_H */
diff --git a/include/uapi/linux/dma-heap.h b/include/uapi/linux/dma-heap.h
deleted file mode 100644
index 6ce5cc68d238..000000000000
--- a/include/uapi/linux/dma-heap.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * DMABUF Heaps Userspace API
- *
- * Copyright (C) 2011 Google, Inc.
- * Copyright (C) 2019 Linaro Ltd.
- */
-#ifndef _UAPI_LINUX_DMABUF_POOL_H
-#define _UAPI_LINUX_DMABUF_POOL_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-/**
- * DOC: DMABUF Heaps Userspace API
- */
-
-/* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */
-#define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
-
-/* Currently no heap flags */
-#define DMA_HEAP_VALID_HEAP_FLAGS (0)
-
-/**
- * struct dma_heap_allocation_data - metadata passed from userspace for
- *                                      allocations
- * @len:		size of the allocation
- * @fd:			will be populated with a fd which provdes the
- *			handle to the allocated dma-buf
- * @fd_flags:		file descriptor flags used when allocating
- * @heap_flags:		flags passed to heap
- *
- * Provided by userspace as an argument to the ioctl
- */
-struct dma_heap_allocation_data {
-	__u64 len;
-	__u32 fd;
-	__u32 fd_flags;
-	__u64 heap_flags;
-	__u32 reserved0;
-	__u32 reserved1;
-};
-
-#define DMA_HEAP_IOC_MAGIC		'H'
-
-/**
- * DOC: DMA_HEAP_IOC_ALLOC - allocate memory from pool
- *
- * Takes an dma_heap_allocation_data struct and returns it with the fd field
- * populated with the dmabuf handle of the allocation.
- */
-#define DMA_HEAP_IOC_ALLOC	_IOWR(DMA_HEAP_IOC_MAGIC, 0, \
-				      struct dma_heap_allocation_data)
-
-#endif /* _UAPI_LINUX_DMABUF_POOL_H */