path: root/tools/testing/memblock/tests/alloc_exact_nid_api.c

// SPDX-License-Identifier: GPL-2.0-or-later
#include "alloc_exact_nid_api.h"
#include "alloc_nid_api.h"

#define FUNC_NAME			"memblock_alloc_exact_nid_raw"

/*
 * contains the fraction of MEM_SIZE contained in each node in basis point
 * units (one hundredth of 1% or 1/10000)
 */
static const unsigned int node_fractions[] = {
	2500, /* 1/4  */
	 625, /* 1/16 */
	1250, /* 1/8  */
	1250, /* 1/8  */
	 625, /* 1/16 */
	 625, /* 1/16 */
	2500, /* 1/4  */
	 625, /* 1/16 */
};

/*
 * A test that tries to allocate a memory region in a specific NUMA node that
 * has enough memory to allocate a region of the requested size.
 * Expect to allocate an aligned region at the end of the requested node.
 */
static int alloc_exact_nid_top_down_numa_simple_check(void)
{
	int nid_req = 3;
	struct memblock_region *new_rgn = &memblock.reserved.regions[0];
	struct memblock_region *req_node = &memblock.memory.regions[nid_req];
	void *allocated_ptr = NULL;
	phys_addr_t size;
	phys_addr_t min_addr;
	phys_addr_t max_addr;

	PREFIX_PUSH();
	setup_numa_memblock(node_fractions);

	ASSERT_LE(SZ_4, req_node->size);
	size = req_node->size / SZ_4;
	min_addr = memblock_start_of_DRAM();
	max_addr = memblock_end_of_DRAM();

	allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
						     min_addr, max_addr,
						     nid_req);

	ASSERT_NE(allocated_ptr, NULL);
	ASSERT_MEM_NE(allocated_ptr, 0, size);

	ASSERT_EQ(new_rgn->size, size);
	ASSERT_EQ(new_rgn->base, region_end(req_node) - size);
	ASSERT_LE(req_node->base, new_rgn->base);

	ASSERT_EQ(memblock.reserved.cnt, 1);
	ASSERT_EQ(memblock.reserved.total_size, size);

	test_pass_pop();

	return 0;
}

/*
 * A test that tries to allocate a memory region in a specific NUMA node that
 * is partially reserved but has enough memory for the allocated region:
 *
 *  |           +---------------------------------------+          |
 *  |           |               requested               |          |
 *  +-----------+---------------------------------------+----------+
 *
 *  |           +------------------+              +-----+          |
 *  |           |     reserved     |              | new |          |
 *  +-----------+------------------+--------------+-----+----------+
 *
 * Expect to allocate an aligned region at the end of the requested node. The
 * region count and total size get updated.
 */
static int alloc_exact_nid_top_down_numa_part_reserved_check(void)
{
	int nid_req = 4;
	struct memblock_region *new_rgn = &memblock.reserved.regions[1];
	struct memblock_region *req_node = &memblock.memory.regions[nid_req];
	void *allocated_ptr = NULL;
	struct region r1;
	phys_addr_t size;
	phys_addr_t min_addr;
	phys_addr_t max_addr;

	PREFIX_PUSH();
	setup_numa_memblock(node_fractions);

	ASSERT_LE(SZ_8, req_node->size);
	r1.base = req_node->base;
	r1.size = req_node->size / SZ_2;
	size = r1.size / SZ_4;
	min_addr = memblock_start_of_DRAM();
	max_addr = memblock_end_of_DRAM();

	memblock_reserve(r1.base, r1.size);
	allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
						     min_addr, max_addr,
						     nid_req);

	ASSERT_NE(allocated_ptr, NULL);
	ASSERT_MEM_NE(allocated_ptr, 0, size);

	ASSERT_EQ(new_rgn->size, size);
	ASSERT_EQ(new_rgn->base, region_end(req_node) - size);
	ASSERT_LE(req_node->base, new_rgn->base);

	ASSERT_EQ(memblock.reserved.cnt, 2);
	ASSERT_EQ(memblock.reserved.total_size, size + r1.size);

	test_pass_pop();

	return 0;
}

/*
 * A test that tries to allocate a memory region that spans over the min_addr