linux/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
Mathieu Desnoyers f80f09b59f selftests: dmabuf-heaps: Fix incorrect kernel headers search path
Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents
building against kernel headers from the build environment in scenarios
where kernel headers are installed into a specific output directory
(O=...).

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: linux-kselftest@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>  # 5.18+
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2023-02-13 09:09:44 -07:00

486 lines
9.6 KiB
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 <linux/dma-heap.h>
#include <drm/drm.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_fdflags(int fd, size_t len, unsigned int fd_flags,
unsigned int heap_flags, int *dmabuf_fd)
{
struct dma_heap_allocation_data data = {
.len = len,
.fd = 0,
.fd_flags = fd_flags,
.heap_flags = heap_flags,
};
int ret;
if (!dmabuf_fd)
return -EINVAL;
ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
if (ret < 0)
return ret;
*dmabuf_fd = (int)data.fd;
return ret;
}
static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags,
int *dmabuf_fd)
{
return dmabuf_heap_alloc_fdflags(fd, len, O_RDWR | O_CLOEXEC, flags,
dmabuf_fd);
}
static int dmabuf_sync(int fd, int start_stop)
{
struct dma_buf_sync sync = {
.flags = start_stop | DMA_BUF_SYNC_RW,
};
return ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
}
#define ONE_MEG (1024 * 1024)
static int test_alloc_and_import(char *heap_name)
{
int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
uint32_t handle = 0;
void *p = NULL;
int ret;
heap_fd = dmabuf_heap_open(heap_name);
if (heap_fd < 0)
return -1;
printf(" Testing allocation and importing: ");
ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
if (ret) {
printf("FAIL (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("FAIL (mmap() failed)\n");
ret = -1;
goto out;
}
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("(Could not open vgem - skipping): ");
} else {
ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
if (ret < 0) {
printf("FAIL (Failed to import buffer)\n");
goto out;
}
}
ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
if (ret < 0) {
printf("FAIL (DMA_BUF_SYNC_START failed!)\n");
goto out;
}
memset(p, 0xff, ONE_MEG);
ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
if (ret < 0) {
printf("FAIL (DMA_BUF_SYNC_END failed!)\n");
goto out;
}
close_handle(importer_fd, handle);
ret = 0;
printf(" OK\n");
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;
}
static int test_alloc_zeroed(char *heap_name, size_t size)
{
int heap_fd = -1, dmabuf_fd[32];
int i, j, ret;
void *p = NULL;
char *c;
printf(" Testing alloced %ldk buffers are zeroed: ", size / 1024);
heap_fd = dmabuf_heap_open(heap_name);
if (heap_fd < 0)
return -1;
/* Allocate and fill a bunch of buffers */
for (i = 0; i < 32; i++) {
ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
if (ret < 0) {
printf("FAIL (Allocation (%i) failed)\n", i);
goto out;
}
/* mmap and fill with simple pattern */
p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
if (p == MAP_FAILED) {
printf("FAIL (mmap() failed!)\n");
ret = -1;
goto out;
}
dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
memset(p, 0xff, size);
dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
munmap(p, size);
}
/* close them all */
for (i = 0; i < 32; i++)
close(dmabuf_fd[i]);
/* Allocate and validate all buffers are zeroed */
for (i = 0; i < 32; i++) {
ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
if (ret < 0) {
printf("FAIL (Allocation (%i) failed)\n", i);
goto out;
}
/* mmap and validate everything is zero */
p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
if (p == MAP_FAILED) {
printf("FAIL (mmap() failed!)\n");
ret = -1;
goto out;
}
dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
c = (char *)p;
for (j = 0; j < size; j++) {
if (c[j] != 0) {
printf("FAIL (Allocated buffer not zeroed @ %i)\n", j);
break;
}
}
dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
munmap(p, size);
}
/* close them all */
for (i = 0; i < 32; i++)
close(dmabuf_fd[i]);
close(heap_fd);
printf("OK\n");
return 0;
out:
while (i > 0) {
close(dmabuf_fd[i]);
i--;
}
close(heap_fd);
return ret;
}
/* Test the ioctl version compatibility w/ a smaller structure then expected */
static int dmabuf_heap_alloc_older(int fd, size_t len, unsigned int flags,
int *dmabuf_fd)
{
int ret;
unsigned int older_alloc_ioctl;
struct dma_heap_allocation_data_smaller {
__u64 len;
__u32 fd;
__u32 fd_flags;
} data = {
.len = len,
.fd = 0,
.fd_flags = O_RDWR | O_CLOEXEC,
};
older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
struct dma_heap_allocation_data_smaller);
if (!dmabuf_fd)
return -EINVAL;
ret = ioctl(fd, older_alloc_ioctl, &data);
if (ret < 0)
return ret;
*dmabuf_fd = (int)data.fd;
return ret;
}
/* Test the ioctl version compatibility w/ a larger structure then expected */
static int dmabuf_heap_alloc_newer(int fd, size_t len, unsigned int flags,
int *dmabuf_fd)
{
int ret;
unsigned int newer_alloc_ioctl;
struct dma_heap_allocation_data_bigger {
__u64 len;
__u32 fd;
__u32 fd_flags;
__u64 heap_flags;
__u64 garbage1;
__u64 garbage2;
__u64 garbage3;
} data = {
.len = len,
.fd = 0,
.fd_flags = O_RDWR | O_CLOEXEC,
.heap_flags = flags,
.garbage1 = 0xffffffff,
.garbage2 = 0x88888888,
.garbage3 = 0x11111111,
};
newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
struct dma_heap_allocation_data_bigger);
if (!dmabuf_fd)
return -EINVAL;
ret = ioctl(fd, newer_alloc_ioctl, &data);
if (ret < 0)
return ret;
*dmabuf_fd = (int)data.fd;
return ret;
}
static int test_alloc_compat(char *heap_name)
{
int heap_fd = -1, dmabuf_fd = -1;
int ret;
heap_fd = dmabuf_heap_open(heap_name);
if (heap_fd < 0)
return -1;
printf(" Testing (theoretical)older alloc compat: ");
ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
if (ret) {
printf("FAIL (Older compat allocation failed!)\n");
ret = -1;
goto out;
}
close(dmabuf_fd);
printf("OK\n");
printf(" Testing (theoretical)newer alloc compat: ");
ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
if (ret) {
printf("FAIL (Newer compat allocation failed!)\n");
ret = -1;
goto out;
}
printf("OK\n");
out:
if (dmabuf_fd >= 0)
close(dmabuf_fd);
if (heap_fd >= 0)
close(heap_fd);
return ret;
}
static int test_alloc_errors(char *heap_name)
{
int heap_fd = -1, dmabuf_fd = -1;
int ret;
heap_fd = dmabuf_heap_open(heap_name);
if (heap_fd < 0)
return -1;
printf(" Testing expected error cases: ");
ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
if (!ret) {
printf("FAIL (Did not see expected error (invalid fd)!)\n");
ret = -1;
goto out;
}
ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
if (!ret) {
printf("FAIL (Did not see expected error (invalid heap flags)!)\n");
ret = -1;
goto out;
}
ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
if (!ret) {
printf("FAIL (Did not see expected error (invalid fd flags)!)\n");
ret = -1;
goto out;
}
printf("OK\n");
ret = 0;
out:
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;
printf("Testing heap: %s\n", dir->d_name);
printf("=======================================\n");
ret = test_alloc_and_import(dir->d_name);
if (ret)
break;
ret = test_alloc_zeroed(dir->d_name, 4 * 1024);
if (ret)
break;
ret = test_alloc_zeroed(dir->d_name, ONE_MEG);
if (ret)
break;
ret = test_alloc_compat(dir->d_name);
if (ret)
break;
ret = test_alloc_errors(dir->d_name);
if (ret)
break;
}
closedir(d);
return ret;
}