Resguardo inicial

linux-7.2.3/tools/testing/scatterlist/Makefile

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0-only
+CFLAGS += -I. -I../../include -g -O2 -Wall -fsanitize=address
+LDFLAGS += -fsanitize=address -fsanitize=undefined
+TARGETS = main
+OFILES = main.o scatterlist.o
+
+ifeq ($(BUILD), 32)
+        CFLAGS += -m32
+        LDFLAGS += -m32
+endif
+
+targets: include $(TARGETS)
+
+main: $(OFILES)
+
+clean:
+	$(RM) $(TARGETS) $(OFILES) scatterlist.c linux/scatterlist.h linux/highmem.h linux/kmemleak.h linux/slab.h asm/io.h
+	@rmdir asm
+
+scatterlist.c: ../../../lib/scatterlist.c
+	@sed -e 's/^static //' -e 's/__always_inline //' -e 's/inline //' < $< > $@
+
+.PHONY: include
+
+include: ../../../include/linux/scatterlist.h
+	@mkdir -p linux
+	@mkdir -p asm
+	@touch asm/io.h
+	@touch linux/highmem.h
+	@touch linux/kmemleak.h
+	@touch linux/slab.h
+	@cp $< linux/scatterlist.h

linux-7.2.3/tools/testing/scatterlist/linux/mm.h

@@ -0,0 +1,160 @@
+#ifndef _LINUX_MM_H
+#define _LINUX_MM_H
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+
+typedef unsigned long dma_addr_t;
+
+#define unlikely
+
+#define BUG_ON(x) assert(!(x))
+
+#define WARN_ON(condition) ({                                           \
+	int __ret_warn_on = !!(condition);                              \
+	unlikely(__ret_warn_on);                                        \
+})
+
+#define WARN_ON_ONCE(condition) ({                              \
+	int __ret_warn_on = !!(condition);                      \
+	if (unlikely(__ret_warn_on))                            \
+		assert(0);                                      \
+	unlikely(__ret_warn_on);                                \
+})
+
+#define PAGE_SIZE	(4096)
+#define PAGE_SHIFT	(12)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
+#define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))
+#define ALIGN(x, a)			__ALIGN_KERNEL((x), (a))
+#define ALIGN_DOWN(x, a)		__ALIGN_KERNEL((x) - ((a) - 1), (a))
+
+#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
+
+#define offset_in_page(p)	((unsigned long)(p) & ~PAGE_MASK)
+
+#define virt_to_page(x)	((void *)x)
+#define page_address(x)	((void *)x)
+
+static inline unsigned long page_to_phys(struct page *page)
+{
+	assert(0);
+
+	return 0;
+}
+
+#define page_to_pfn(page) ((unsigned long)(page) / PAGE_SIZE)
+#define pfn_to_page(pfn) (void *)((pfn) * PAGE_SIZE)
+
+#define __min(t1, t2, min1, min2, x, y) ({              \
+	t1 min1 = (x);                                  \
+	t2 min2 = (y);                                  \
+	(void) (&min1 == &min2);                        \
+	min1 < min2 ? min1 : min2; })
+
+#define ___PASTE(a,b) a##b
+#define __PASTE(a,b) ___PASTE(a,b)
+
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+#define min(x, y)                                       \
+	__min(typeof(x), typeof(y),                     \
+	      __UNIQUE_ID(min1_), __UNIQUE_ID(min2_),   \
+	      x, y)
+
+#define min_t(type, x, y)                               \
+	__min(type, type,                               \
+	      __UNIQUE_ID(min1_), __UNIQUE_ID(min2_),   \
+	      x, y)
+
+#define pagefault_disabled() (0)
+
+static inline void *kmap(struct page *page)
+{
+	assert(0);
+
+	return NULL;
+}
+
+static inline void *kmap_atomic(struct page *page)
+{
+	assert(0);
+
+	return NULL;
+}
+
+static inline void kunmap(void *addr)
+{
+	assert(0);
+}
+
+static inline void kunmap_atomic(void *addr)
+{
+	assert(0);
+}
+
+static inline unsigned long __get_free_page(unsigned int flags)
+{
+	return (unsigned long)malloc(PAGE_SIZE);
+}
+
+static inline void free_page(unsigned long page)
+{
+	free((void *)page);
+}
+
+static inline void *kmalloc(unsigned int size, unsigned int flags)
+{
+	return malloc(size);
+}
+
+static inline void *
+kmalloc_array(unsigned int n, unsigned int size, unsigned int flags)
+{
+	return malloc(n * size);
+}
+
+#define kfree(x) free(x)
+
+#define kmemleak_alloc(a, b, c, d)
+#define kmemleak_free(a)
+
+#define PageSlab(p) (0)
+#define flush_dcache_page(p)
+
+#define MAX_ERRNO	4095
+
+#define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
+
+static inline void * __must_check ERR_PTR(long error)
+{
+	return (void *) error;
+}
+
+static inline long __must_check PTR_ERR(__force const void *ptr)
+{
+	return (long) ptr;
+}
+
+static inline bool __must_check IS_ERR(__force const void *ptr)
+{
+	return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
+{
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+	else
+		return 0;
+}
+
+#define IS_ENABLED(x) (0)
+
+#endif

linux-7.2.3/tools/testing/scatterlist/main.c

@@ -0,0 +1,133 @@
+#include <stdio.h>
+#include <assert.h>
+
+#include <linux/scatterlist.h>
+
+#define MAX_PAGES (64)
+
+struct test {
+	int alloc_ret;
+	unsigned num_pages;
+	unsigned *pfn;
+	unsigned *pfn_app;
+	unsigned size;
+	unsigned int max_seg;
+	unsigned int expected_segments;
+};
+
+static void set_pages(struct page **pages, const unsigned *array, unsigned num)
+{
+	unsigned int i;
+
+	assert(num < MAX_PAGES);
+	for (i = 0; i < num; i++)
+		pages[i] = (struct page *)(unsigned long)
+			   ((1 + array[i]) * PAGE_SIZE);
+}
+
+#define pfn(...) (unsigned []){ __VA_ARGS__ }
+
+static void fail(struct test *test, struct sg_table *st, const char *cond)
+{
+	unsigned int i;
+
+	fprintf(stderr, "Failed on '%s'!\n\n", cond);
+
+	printf("size = %u, max segment = %u, expected nents = %u\nst->nents = %u, st->orig_nents= %u\n",
+	       test->size, test->max_seg, test->expected_segments, st->nents,
+	       st->orig_nents);
+
+	printf("%u input PFNs:", test->num_pages);
+	for (i = 0; i < test->num_pages; i++)
+		printf(" %x", test->pfn[i]);
+	printf("\n");
+
+	exit(1);
+}
+
+#define VALIDATE(cond, st, test) \
+	if (!(cond)) \
+		fail((test), (st), #cond);
+
+int main(void)
+{
+	const unsigned int sgmax = UINT_MAX;
+	struct test *test, tests[] = {
+		{ -EINVAL, 1, pfn(0), NULL, PAGE_SIZE, 0, 1 },
+		{ 0, 1, pfn(0), NULL, PAGE_SIZE, PAGE_SIZE + 1, 1 },
+		{ 0, 1, pfn(0), NULL, PAGE_SIZE, sgmax, 1 },
+		{ 0, 1, pfn(0), NULL, 1, sgmax, 1 },
+		{ 0, 2, pfn(0, 1), NULL, 2 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 2, pfn(1, 0), NULL, 2 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(0, 1, 2), NULL, 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), NULL, 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), pfn(3, 4, 5), 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), pfn(4, 5, 6), 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(0, 2, 1), NULL, 3 * PAGE_SIZE, sgmax, 3 },
+		{ 0, 3, pfn(0, 1, 3), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(1, 2, 4), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(1, 3, 4), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 4, pfn(0, 1, 3, 4), NULL, 4 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 5, pfn(0, 1, 3, 4, 5), NULL, 5 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 5, pfn(0, 1, 3, 4, 6), NULL, 5 * PAGE_SIZE, sgmax, 3 },
+		{ 0, 5, pfn(0, 1, 2, 3, 4), NULL, 5 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 5, pfn(0, 1, 2, 3, 4), NULL, 5 * PAGE_SIZE, 2 * PAGE_SIZE,
+		  3 },
+		{ 0, 6, pfn(0, 1, 2, 3, 4, 5), NULL, 6 * PAGE_SIZE,
+		  2 * PAGE_SIZE, 3 },
+		{ 0, 6, pfn(0, 2, 3, 4, 5, 6), NULL, 6 * PAGE_SIZE,
+		  2 * PAGE_SIZE, 4 },
+		{ 0, 6, pfn(0, 1, 3, 4, 5, 6), pfn(7, 8, 9, 10, 11, 12),
+		  6 * PAGE_SIZE, 12 * PAGE_SIZE, 2 },
+		{ 0, 0, NULL, NULL, 0, 0, 0 },
+	};
+	unsigned int i;
+
+	for (i = 0, test = tests; test->expected_segments; test++, i++) {
+		int left_pages = test->pfn_app ? test->num_pages : 0;
+		struct sg_append_table append = {};
+		struct page *pages[MAX_PAGES];
+		int ret;
+
+		set_pages(pages, test->pfn, test->num_pages);
+
+		if (test->pfn_app)
+			ret = sg_alloc_append_table_from_pages(
+				&append, pages, test->num_pages, 0, test->size,
+				test->max_seg, left_pages, GFP_KERNEL);
+		else
+			ret = sg_alloc_table_from_pages_segment(
+				&append.sgt, pages, test->num_pages, 0,
+				test->size, test->max_seg, GFP_KERNEL);
+
+		assert(ret == test->alloc_ret);
+
+		if (test->alloc_ret)
+			continue;
+
+		if (test->pfn_app) {
+			set_pages(pages, test->pfn_app, test->num_pages);
+			ret = sg_alloc_append_table_from_pages(
+				&append, pages, test->num_pages, 0, test->size,
+				test->max_seg, 0, GFP_KERNEL);
+
+			assert(ret == test->alloc_ret);
+		}
+
+		VALIDATE(append.sgt.nents == test->expected_segments,
+			 &append.sgt, test);
+		if (!test->pfn_app)
+			VALIDATE(append.sgt.orig_nents ==
+					 test->expected_segments,
+				 &append.sgt, test);
+
+		if (test->pfn_app)
+			sg_free_append_table(&append);
+		else
+			sg_free_table(&append.sgt);
+	}
+
+	assert(i == (sizeof(tests) / sizeof(tests[0])) - 1);
+
+	return 0;
+}