From: John Stultz Date: Tue, 3 Dec 2019 17:26:41 +0000 (+0000) Subject: kselftests: Add dma-heap test X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a8779927fd86c91f5400bfcbccfa018a667d8350;p=openwrt%2Fstaging%2Fblogic.git kselftests: Add dma-heap test Add very trivial allocation and import test for dma-heaps, utilizing the vgem driver as a test importer. A good chunk of this code taken from: tools/testing/selftests/android/ion/ionmap_test.c Originally by Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: Hridya Valsaraju Cc: Sandeep Patil Cc: Hillf Danton Cc: Dave Airlie Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Reviewed-by: Brian Starkey Acked-by: Sandeep Patil Acked-by: Laura Abbott Tested-by: Ayan Kumar Halder Signed-off-by: John Stultz Signed-off-by: Sumit Semwal Link: https://patchwork.freedesktop.org/patch/msgid/20191203172641.66642-6-john.stultz@linaro.org --- diff --git a/tools/testing/selftests/dmabuf-heaps/Makefile b/tools/testing/selftests/dmabuf-heaps/Makefile new file mode 100644 index 000000000000..607c2acd2082 --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS += -static -O3 -Wl,-no-as-needed -Wall -I../../../../usr/include + +TEST_GEN_PROGS = dmabuf-heap + +include ../lib.mk diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c new file mode 100644 index 000000000000..3e53ad331bdc --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c @@ -0,0 +1,396 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#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_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_IOC_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 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 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; + + printf("Testing heap: %s\n", heap_name); + + heap_fd = dmabuf_heap_open(heap_name); + if (heap_fd < 0) + return -1; + + 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; +} + +/* 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\n"); + ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd); + if (ret) { + printf("Older compat allocation failed!\n"); + ret = -1; + goto out; + } + close(dmabuf_fd); + + printf("Testing (theoretical)newer alloc compat\n"); + ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd); + if (ret) { + printf("Newer compat allocation failed!\n"); + ret = -1; + goto out; + } + printf("Ioctl compatibility tests passed\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\n"); + ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd); + if (!ret) { + printf("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("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("Did not see expected error (invalid fd flags)!\n"); + ret = -1; + goto out; + } + + printf("Expected error checking passed\n"); +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; + + ret = test_alloc_and_import(dir->d_name); + 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; +}