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Signed-off-by: Huan Yang --- drivers/dma-buf/udmabuf.c | 142 --------------- include/uapi/linux/udmabuf.h | 5 - .../selftests/drivers/dma-buf/Makefile | 1 - .../selftests/drivers/dma-buf/udmabuf_vmap.c | 166 ------------------ 4 files changed, 314 deletions(-) delete mode 100644 tools/testing/selftests/drivers/dma-buf/udmabuf_vmap.c diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 78549a9f24ca..67ab50914a31 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -106,49 +106,6 @@ static int mmap_udmabuf(struct dma_buf *buf, struct vm_area_struct *vma) return 0; } -struct udmabuf_pfn_data { - unsigned long *pfns; - pgprot_t prot; - unsigned int idx; -}; - -static int udmabuf_vmap_pfn_apply(pte_t *pte, unsigned long addr, void *private) -{ - struct udmabuf_pfn_data *data = private; - pte_t ptent; - - ptent = pte_mkspecial(pfn_pte(data->pfns[data->idx], data->prot)); - set_pte_at(&init_mm, addr, pte, ptent); - - data->idx++; - return 0; -} - -static void *udmabuf_vmap_pfn(unsigned long *pfns, unsigned int count, - pgprot_t prot) -{ - struct udmabuf_pfn_data data = { .pfns = pfns, - .prot = pgprot_nx(prot) }; - struct vm_struct *area; - - area = get_vm_area_caller(count * PAGE_SIZE, 0, - __builtin_return_address(0)); - if (!area) - return NULL; - - if (apply_to_page_range(&init_mm, (unsigned long)area->addr, - count * PAGE_SIZE, udmabuf_vmap_pfn_apply, - &data)) { - free_vm_area(area); - return NULL; - } - - flush_cache_vmap((unsigned long)area->addr, - (unsigned long)area->addr + count * PAGE_SIZE); - - return area->addr; -} - static int vmap_udmabuf(struct dma_buf *buf, struct iosys_map *map) { struct udmabuf *ubuf = buf->priv; @@ -556,102 +513,6 @@ static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg) return ret; } -static void *udmabuf_vmap_by_pfns(struct udmabuf *udmabuf) -{ - unsigned long *pfns; - void *vaddr = NULL; - unsigned int i; - - pfns = kvmalloc_array(udmabuf->pagecount, sizeof(*pfns), GFP_KERNEL); - if (WARN_ON(!pfns)) - return NULL; - - for (i = 0; i < udmabuf->pagecount; ++i) - pfns[i] = folio_pfn(udmabuf->folios[i]) + - (udmabuf->offsets[i] >> PAGE_SHIFT); - - vaddr = udmabuf_vmap_pfn(pfns, udmabuf->pagecount, PAGE_KERNEL); - WARN_ON(!vaddr); - - kvfree(pfns); - return vaddr; -} - -static void *udmabuf_vmap_by_pages(struct udmabuf *udmabuf) -{ - struct page **pages; - void *vaddr = NULL; - unsigned int i; - - pages = kvmalloc_array(udmabuf->pagecount, sizeof(*pages), GFP_KERNEL); - if (WARN_ON(!pages)) - return NULL; - - for (i = 0; i < udmabuf->pagecount; ++i) - pages[i] = folio_page(udmabuf->folios[i], - udmabuf->offsets[i] >> PAGE_SHIFT); - - vaddr = vmap(pages, udmabuf->pagecount, 0, PAGE_KERNEL); - WARN_ON(!vaddr); - - kvfree(pages); - return vaddr; -} - -static long udmabuf_vmap_test(struct file *filp, unsigned long arg) -{ - struct udmabuf_vmap uv; - struct dma_buf *dmabuf; - bool can_page = true; - struct iosys_map map; - struct udmabuf *ubuf; - void *vaddr, *pvaddr; - struct file *file; - int ret = 0, i; - - if (copy_from_user(&uv, (void __user *)arg, sizeof(uv))) - return -EFAULT; - file = fget(uv.dma_buf_fd); - if (!file) - return -EINVAL; - - dmabuf = file->private_data; - ret = dma_buf_vmap(dmabuf, &map); - if (ret) - goto out; - vaddr = map.vaddr; - - ubuf = dmabuf->priv; - for (i = 0; i < ubuf->pagecount; ++i) { - struct folio *folio = ubuf->folios[i]; - - if (folio_test_hugetlb_vmemmap_optimized(folio)) { - can_page = false; - break; - } - } - - if (!can_page) - pvaddr = udmabuf_vmap_by_pfns(ubuf); - else - pvaddr = udmabuf_vmap_by_pages(ubuf); - - if (!pvaddr) - goto out_vaddr; - - // compare if pages and pfns is same? - if (WARN_ON(memcmp(vaddr, pvaddr, ubuf->pagecount * PAGE_SIZE) != 0)) - ret = -EINVAL; - - vunmap(pvaddr); -out_vaddr: - dma_buf_vunmap(dmabuf, &map); -out: - fput(file); - - return ret; -} - static long udmabuf_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -664,9 +525,6 @@ static long udmabuf_ioctl(struct file *filp, unsigned int ioctl, case UDMABUF_CREATE_LIST: ret = udmabuf_ioctl_create_list(filp, arg); break; - case UDMABUF_VMAP: - ret = udmabuf_vmap_test(filp, arg); - break; default: ret = -ENOTTY; break; diff --git a/include/uapi/linux/udmabuf.h b/include/uapi/linux/udmabuf.h index 88f5e5516286..46b6532ed855 100644 --- a/include/uapi/linux/udmabuf.h +++ b/include/uapi/linux/udmabuf.h @@ -27,12 +27,7 @@ struct udmabuf_create_list { struct udmabuf_create_item list[]; }; -struct udmabuf_vmap { - int dma_buf_fd; -}; - #define UDMABUF_CREATE _IOW('u', 0x42, struct udmabuf_create) #define UDMABUF_CREATE_LIST _IOW('u', 0x43, struct udmabuf_create_list) -#define UDMABUF_VMAP _IOW('u', 0x44, struct udmabuf_vmap) #endif /* _UAPI_LINUX_UDMABUF_H */ diff --git a/tools/testing/selftests/drivers/dma-buf/Makefile b/tools/testing/selftests/drivers/dma-buf/Makefile index e5b131dcc2c3..441407bb0e80 100644 --- a/tools/testing/selftests/drivers/dma-buf/Makefile +++ b/tools/testing/selftests/drivers/dma-buf/Makefile @@ -2,7 +2,6 @@ CFLAGS += $(KHDR_INCLUDES) TEST_GEN_PROGS := udmabuf -TEST_GEN_PROGS := udmabuf_vmap top_srcdir ?=../../../../.. diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf_vmap.c b/tools/testing/selftests/drivers/dma-buf/udmabuf_vmap.c deleted file mode 100644 index 7bd46c909bdf..000000000000 --- a/tools/testing/selftests/drivers/dma-buf/udmabuf_vmap.c +++ /dev/null @@ -1,166 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#define _GNU_SOURCE -#define __EXPORTED_HEADERS__ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include "../../kselftest.h" - -#define TEST_PREFIX "drivers/dma-buf/udmabuf" -#define NUM_PAGES 4 -#define NUM_ENTRIES 4 -#define MEMFD_SIZE 1024 /* in pages */ - -static unsigned int page_size; - -static int create_memfd_with_seals(off64_t size, bool hpage) -{ - int memfd, ret; - unsigned int flags = MFD_ALLOW_SEALING; - - if (hpage) - flags |= MFD_HUGETLB; - - memfd = memfd_create("udmabuf-test", flags); - if (memfd < 0) { - ksft_print_msg("%s: [skip,no-memfd]\n", TEST_PREFIX); - exit(KSFT_SKIP); - } - - ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK); - if (ret < 0) { - ksft_print_msg("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX); - exit(KSFT_SKIP); - } - - ret = ftruncate(memfd, size); - if (ret == -1) { - ksft_print_msg("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX); - exit(KSFT_FAIL); - } - - return memfd; -} - -static int create_udmabuf_list(int devfd, int memfd, off64_t memfd_size) -{ - struct udmabuf_create_list *list; - int ubuf_fd, i; - - list = malloc(sizeof(struct udmabuf_create_list) + - sizeof(struct udmabuf_create_item) * NUM_ENTRIES); - if (!list) { - ksft_print_msg("%s: [FAIL, udmabuf-malloc]\n", TEST_PREFIX); - exit(KSFT_FAIL); - } - - for (i = 0; i < NUM_ENTRIES; i++) { - list->list[i].memfd = memfd; - list->list[i].offset = i * (memfd_size / NUM_ENTRIES); - list->list[i].size = memfd_size / NUM_ENTRIES; - } - - list->count = NUM_ENTRIES; - list->flags = UDMABUF_FLAGS_CLOEXEC; - ubuf_fd = ioctl(devfd, UDMABUF_CREATE_LIST, list); - free(list); - if (ubuf_fd < 0) { - ksft_print_msg("%s: [FAIL, udmabuf-create]\n", TEST_PREFIX); - exit(KSFT_FAIL); - } - - return ubuf_fd; -} - -static void *mmap_fd(int fd, off64_t size) -{ - void *addr; - - addr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (addr == MAP_FAILED) { - ksft_print_msg("%s: ubuf_fd mmap fail\n", TEST_PREFIX); - exit(KSFT_FAIL); - } - - return addr; -} - -int main(int argc, char *argv[]) -{ - struct udmabuf_create create; - int devfd, memfd, buf, ret; - struct udmabuf_vmap vm; - unsigned long *vaddr; - off64_t size; - int i; - - ksft_print_header(); - ksft_set_plan(2); - - devfd = open("/dev/udmabuf", O_RDWR); - if (devfd < 0) { - ksft_print_msg( - "%s: [skip,no-udmabuf: Unable to access DMA buffer device file]\n", - TEST_PREFIX); - exit(KSFT_SKIP); - } - - /** - * Normal test - */ - size = getpagesize() * 512 + getpagesize() * 256; - memfd = create_memfd_with_seals(size, false); - buf = create_udmabuf_list(devfd, memfd, size); - vaddr = (unsigned long *)mmap_fd(buf, size); - for (i = 0; i < size / sizeof(unsigned long); i++) - vaddr[i] = random(); - - vm.dma_buf_fd = buf; - - ret = ioctl(devfd, UDMABUF_VMAP, &vm); - if (ret < 0) - ksft_test_result_fail("%s: [FAIL, normal test]\n", TEST_PREFIX); - else - ksft_test_result_pass("%s: [PASS, normal test]\n", TEST_PREFIX); - munmap(vaddr, size); - close(buf); - close(memfd); - - /** - * Hugetlb test, 2MB - */ - size = getpagesize() * 512; - memfd = create_memfd_with_seals(size, true); - buf = create_udmabuf_list(devfd, memfd, size); - vaddr = (unsigned long *)mmap_fd(buf, size); - for (i = 0; i < size / sizeof(unsigned long); i++) - vaddr[i] = random(); - - vm.dma_buf_fd = buf; - - ret = ioctl(devfd, UDMABUF_VMAP, &vm); - if (ret < 0) - ksft_test_result_fail("%s: [FAIL, huge test]\n", TEST_PREFIX); - else - ksft_test_result_pass("%s: [PASS, huge test]\n", TEST_PREFIX); - munmap(vaddr, size); - close(buf); - close(memfd); - - ksft_print_msg("%s: ok\n", TEST_PREFIX); - ksft_print_cnts(); - - return 0; -}