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Davis" , Xu YiPing , "Chenfeng (puck)" , butao , "Xiaqing (A)" , Yudongbin , Christoph Hellwig , Chenbo Feng , Alistair Strachan , dri-devel@lists.freedesktop.org Subject: [RFC][PATCH 6/6 v3] kselftests: Add dma-heap test Date: Thu, 28 Mar 2019 17:16:02 -0700 Message-Id: <1553818562-2516-7-git-send-email-john.stultz@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1553818562-2516-1-git-send-email-john.stultz@linaro.org> References: <1553818562-2516-1-git-send-email-john.stultz@linaro.org> Add very trivial allocation and import test for dma-heaps. TODO: Still needs improvements 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: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Signed-off-by: John Stultz --- v2: Switched to use reworked dma-heap apis v3: * Add simple mmap * Utilize dma-buf testdev to test importing --- tools/testing/selftests/dmabuf-heaps/Makefile | 11 ++ tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c | 169 +++++++++++++++++++++ 2 files changed, 180 insertions(+) create mode 100644 tools/testing/selftests/dmabuf-heaps/Makefile create mode 100644 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c -- 2.7.4 diff --git a/tools/testing/selftests/dmabuf-heaps/Makefile b/tools/testing/selftests/dmabuf-heaps/Makefile new file mode 100644 index 0000000..c414ad3 --- /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 0000000..df30465 --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../../../../include/uapi/linux/dma-heap.h" +#include "../../../../include/uapi/linux/dma-buf-testdev.h" + +#define DEVPATH "/dev/dma_heap" + +int dmabuf_importer_open(char *name) +{ + int ret, fd; + char buf[256]; + + ret = sprintf(buf, "/dev/%s", 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_importer_import(int importer_fd, int dmabuf_fd, void *phys_addr) +{ + struct dma_buf_testdev_data data = { + .fd = dmabuf_fd, + .phys = 0, + }; + + int ret; + + if (phys_addr == NULL) + return -EINVAL; + + ret = ioctl(importer_fd, DMA_BUF_TESTDEV_IOC_CONVERT, &data); + if (ret < 0) + return ret; + + *(__u64 *)phys_addr = data.phys; + + return ret; +} + + +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, + .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; +} + +#define ONE_MEG (1024*1024) + +void do_test(char *heap_name) +{ + int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1; + void *p; + int ret; + long phys; + + 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"); + abort(); + } + printf("mmap passed\n"); + + memset(p, 1, ONE_MEG/2); + p = (char *)p + ONE_MEG/2; + memset(p, 0, ONE_MEG/2); + munmap(p, ONE_MEG); + + + importer_fd = dmabuf_importer_open("dma-buf-testdev"); + + ret = dmabuf_importer_import(importer_fd, dmabuf_fd, &phys); + if (ret) { + printf("Error importing to test device!\n"); + goto out; + } + printf("Import passed!\n"); + + /* DO SOMETHING WITH THE DMABUF HERE? */ + +out: + 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) + do_test(dir->d_name); + + return 0; +}