Revert "kselftests: Add dma-heap test"

This reverts commit ab87cc97.

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: ab87cc97 ("kselftests: Add dma-heap test")
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: Laura Abbott <labbott@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Acked-by: David Airlie <airlied@linux.ie>
Signed-off-by: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20191030203003.101156-2-sean@poorly.run

tools/testing/selftests/dmabuf-heaps/Makefile

-# SPDX-License-Identifier: GPL-2.0
-CFLAGS += -static -O3 -Wl,-no-as-needed -Wall
-#LDLIBS += -lrt -lpthread -lm
-
-# these are all "safe" tests that don't modify
-# system time or require escalated privileges
-TEST_GEN_PROGS = dmabuf-heap
-
-include ../lib.mk

tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c

-// SPDX-License-Identifier: GPL-2.0
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-
-#include <linux/dma-buf.h>
-#include <drm/drm.h>
-
-#include "../../../../include/uapi/linux/dma-heap.h"
-
-#define DEVPATH "/dev/dma_heap"
-
-static int check_vgem(int fd)
-{
-	drm_version_t version = { 0 };
-	char name[5];
-	int ret;
-
-	version.name_len = 4;
-	version.name = name;
-
-	ret = ioctl(fd, DRM_IOCTL_VERSION, &version);
-	if (ret)
-		return 0;
-
-	return !strcmp(name, "vgem");
-}
-
-static int open_vgem(void)
-{
-	int i, fd;
-	const char *drmstr = "/dev/dri/card";
-
-	fd = -1;
-	for (i = 0; i < 16; i++) {
-		char name[80];
-
-		snprintf(name, 80, "%s%u", drmstr, i);
-
-		fd = open(name, O_RDWR);
-		if (fd < 0)
-			continue;
-
-		if (!check_vgem(fd)) {
-			close(fd);
-			fd = -1;
-			continue;
-		} else {
-			break;
-		}
-	}
-	return fd;
-}
-
-static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle)
-{
-	struct drm_prime_handle import_handle = {
-		.fd = dma_buf_fd,
-		.flags = 0,
-		.handle = 0,
-	 };
-	int ret;
-
-	ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle);
-	if (ret == 0)
-		*handle = import_handle.handle;
-	return ret;
-}
-
-static void close_handle(int vgem_fd, uint32_t handle)
-{
-	struct drm_gem_close close = {
-		.handle = handle,
-	};
-
-	ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close);
-}
-
-static int dmabuf_heap_open(char *name)
-{
-	int ret, fd;
-	char buf[256];
-
-	ret = snprintf(buf, 256, "%s/%s", DEVPATH, name);
-	if (ret < 0) {
-		printf("snprintf failed!\n");
-		return ret;
-	}
-
-	fd = open(buf, O_RDWR);
-	if (fd < 0)
-		printf("open %s failed!\n", buf);
-	return fd;
-}
-
-static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags,
-			     int *dmabuf_fd)
-{
-	struct dma_heap_allocation_data data = {
-		.len = len,
-		.fd_flags = O_RDWR | O_CLOEXEC,
-		.heap_flags = flags,
-	};
-	int ret;
-
-	if (!dmabuf_fd)
-		return -EINVAL;
-
-	ret = ioctl(fd, DMA_HEAP_IOC_ALLOC, &data);
-	if (ret < 0)
-		return ret;
-	*dmabuf_fd = (int)data.fd;
-	return ret;
-}
-
-static void dmabuf_sync(int fd, int start_stop)
-{
-	struct dma_buf_sync sync = {
-		.flags = start_stop | DMA_BUF_SYNC_RW,
-	};
-	int ret;
-
-	ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
-	if (ret)
-		printf("sync failed %d\n", errno);
-}
-
-#define ONE_MEG (1024 * 1024)
-
-static int do_test(char *heap_name)
-{
-	int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
-	uint32_t handle = 0;
-	void *p = NULL;
-	int ret;
-
-	printf("Testing heap: %s\n", heap_name);
-
-	heap_fd = dmabuf_heap_open(heap_name);
-	if (heap_fd < 0)
-		return;
-
-	printf("Allocating 1 MEG\n");
-	ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
-	if (ret) {
-		printf("Allocation Failed!\n");
-		ret = -1;
-		goto out;
-	}
-	/* mmap and write a simple pattern */
-	p = mmap(NULL,
-		 ONE_MEG,
-		 PROT_READ | PROT_WRITE,
-		 MAP_SHARED,
-		 dmabuf_fd,
-		 0);
-	if (p == MAP_FAILED) {
-		printf("mmap() failed: %m\n");
-		ret = -1;
-		goto out;
-	}
-	printf("mmap passed\n");
-
-	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
-	memset(p, 1, ONE_MEG / 2);
-	memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2);
-	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
-
-	importer_fd = open_vgem();
-	if (importer_fd < 0) {
-		ret = importer_fd;
-		printf("Failed to open vgem\n");
-		goto out;
-	}
-
-	ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
-	if (ret < 0) {
-		printf("Failed to import buffer\n");
-		goto out;
-	}
-	printf("import passed\n");
-
-	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
-	memset(p, 0xff, ONE_MEG);
-	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
-	printf("syncs passed\n");
-
-	close_handle(importer_fd, handle);
-	ret = 0;
-
-out:
-	if (p)
-		munmap(p, ONE_MEG);
-	if (importer_fd >= 0)
-		close(importer_fd);
-	if (dmabuf_fd >= 0)
-		close(dmabuf_fd);
-	if (heap_fd >= 0)
-		close(heap_fd);
-
-	return ret;
-}
-
-int main(void)
-{
-	DIR *d;
-	struct dirent *dir;
-	int ret = -1;
-
-	d = opendir(DEVPATH);
-	if (!d) {
-		printf("No %s directory?\n", DEVPATH);
-		return -1;
-	}
-
-	while ((dir = readdir(d)) != NULL) {
-		if (!strncmp(dir->d_name, ".", 2))
-			continue;
-		if (!strncmp(dir->d_name, "..", 3))
-			continue;
-
-		ret = do_test(dir->d_name);
-		if (ret)
-			break;
-	}
-	closedir(d);
-
-	return ret;
-}