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Davis" , Christoph Hellwig , Chenbo Feng , Alistair Strachan , dri-devel@lists.freedesktop.org Subject: [PATCH v5 5/5] kselftests: Add dma-heap test Date: Fri, 7 Jun 2019 03:07:19 +0000 Message-Id: <20190607030719.77286-6-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190607030719.77286-1-john.stultz@linaro.org> References: <20190607030719.77286-1-john.stultz@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: John Stultz Change-Id: Ib98569fdda6378eb086b8092fb5d6bd419b8d431 --- v2: * Switched to use reworked dma-heap apis v3: * Add simple mmap * Utilize dma-buf testdev to test importing v4: * Rework to use vgem * Pass in fd_flags to match interface changes * Skip . and .. dirs --- tools/testing/selftests/dmabuf-heaps/Makefile | 11 + .../selftests/dmabuf-heaps/dmabuf-heap.c | 232 ++++++++++++++++++ 2 files changed, 243 insertions(+) create mode 100644 tools/testing/selftests/dmabuf-heaps/Makefile create mode 100644 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c diff --git a/tools/testing/selftests/dmabuf-heaps/Makefile b/tools/testing/selftests/dmabuf-heaps/Makefile new file mode 100644 index 000000000000..c414ad36b4bf --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/Makefile @@ -0,0 +1,11 @@ +# 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 + 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..33d4b105c673 --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c @@ -0,0 +1,232 @@ +// 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" + +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 1; + + return strcmp(name, "vgem"); +} + +int open_vgem(void) +{ + int i, fd; + const char *drmstr = "/dev/dri/card"; + + fd = -1; + for (i = 0; i < 16; i++) { + char name[80]; + + sprintf(name, "%s%u", drmstr, i); + + fd = open(name, O_RDWR); + if (fd < 0) + continue; + + if (check_vgem(fd)) { + close(fd); + continue; + } else { + break; + } + + } + return fd; +} + +int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle) +{ + struct drm_prime_handle import_handle = { 0 }; + int ret; + + import_handle.fd = dma_buf_fd; + import_handle.flags = 0; + import_handle.handle = 0; + + ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle); + if (ret == 0) + *handle = import_handle.handle; + return ret; +} + +void close_handle(int vgem_fd, uint32_t handle) +{ + struct drm_gem_close close = { 0 }; + + close.handle = handle; + ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close); +} + + +int dmabuf_heap_open(char *name) +{ + int ret, fd; + char buf[256]; + + ret = sprintf(buf, "%s/%s", DEVPATH, name); + if (ret < 0) { + printf("sprintf failed!\n"); + return ret; + } + + fd = open(buf, O_RDWR); + if (fd < 0) + printf("open %s failed!\n", buf); + return fd; +} + +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 == NULL) + return -EINVAL; + + ret = ioctl(fd, DMA_HEAP_IOC_ALLOC, &data); + if (ret < 0) + return ret; + *dmabuf_fd = (int)data.fd; + return ret; +} + +void dmabuf_sync(int fd, int start_stop) +{ + struct dma_buf_sync sync = { 0 }; + int ret; + + sync.flags = start_stop | DMA_BUF_SYNC_RW; + ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync); + if (ret) + printf("sync failed %d\n", errno); + +} + +#define ONE_MEG (1024*1024) + +void 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) + 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"); + 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); +} + + +int main(void) +{ + DIR *d; + struct dirent *dir; + + 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; + + do_test(dir->d_name); + } + + return 0; +} -- 2.17.1