linux/drivers/gpu/drm/selftests/test-drm_mm.c

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/*
* Test cases for the drm_mm range manager
*/
#define pr_fmt(fmt) "drm_mm: " fmt
#include <linux/module.h>
#include <linux/prime_numbers.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include <drm/drm_mm.h>
#include "../lib/drm_random.h"
#define TESTS "drm_mm_selftests.h"
#include "drm_selftest.h"
static unsigned int random_seed;
static unsigned int max_iterations = 8192;
static unsigned int max_prime = 128;
enum {
DEFAULT,
TOPDOWN,
BEST,
};
static const struct insert_mode {
const char *name;
unsigned int search_flags;
unsigned int create_flags;
} insert_modes[] = {
[DEFAULT] = { "default", DRM_MM_SEARCH_DEFAULT, DRM_MM_CREATE_DEFAULT },
[TOPDOWN] = { "top-down", DRM_MM_SEARCH_BELOW, DRM_MM_CREATE_TOP },
[BEST] = { "best", DRM_MM_SEARCH_BEST, DRM_MM_CREATE_DEFAULT },
{}
};
static int igt_sanitycheck(void *ignored)
{
pr_info("%s - ok!\n", __func__);
return 0;
}
static bool assert_no_holes(const struct drm_mm *mm)
{
struct drm_mm_node *hole;
u64 hole_start, hole_end;
unsigned long count;
count = 0;
drm_mm_for_each_hole(hole, mm, hole_start, hole_end)
count++;
if (count) {
pr_err("Expected to find no holes (after reserve), found %lu instead\n", count);
return false;
}
drm_mm_for_each_node(hole, mm) {
if (hole->hole_follows) {
pr_err("Hole follows node, expected none!\n");
return false;
}
}
return true;
}
static bool assert_one_hole(const struct drm_mm *mm, u64 start, u64 end)
{
struct drm_mm_node *hole;
u64 hole_start, hole_end;
unsigned long count;
bool ok = true;
if (end <= start)
return true;
count = 0;
drm_mm_for_each_hole(hole, mm, hole_start, hole_end) {
if (start != hole_start || end != hole_end) {
if (ok)
pr_err("empty mm has incorrect hole, found (%llx, %llx), expect (%llx, %llx)\n",
hole_start, hole_end,
start, end);
ok = false;
}
count++;
}
if (count != 1) {
pr_err("Expected to find one hole, found %lu instead\n", count);
ok = false;
}
return ok;
}
static bool assert_continuous(const struct drm_mm *mm, u64 size)
{
struct drm_mm_node *node, *check, *found;
unsigned long n;
u64 addr;
if (!assert_no_holes(mm))
return false;
n = 0;
addr = 0;
drm_mm_for_each_node(node, mm) {
if (node->start != addr) {
pr_err("node[%ld] list out of order, expected %llx found %llx\n",
n, addr, node->start);
return false;
}
if (node->size != size) {
pr_err("node[%ld].size incorrect, expected %llx, found %llx\n",
n, size, node->size);
return false;
}
if (node->hole_follows) {
pr_err("node[%ld] is followed by a hole!\n", n);
return false;
}
found = NULL;
drm_mm_for_each_node_in_range(check, mm, addr, addr + size) {
if (node != check) {
pr_err("lookup return wrong node, expected start %llx, found %llx\n",
node->start, check->start);
return false;
}
found = check;
}
if (!found) {
pr_err("lookup failed for node %llx + %llx\n",
addr, size);
return false;
}
addr += size;
n++;
}
return true;
}
static u64 misalignment(struct drm_mm_node *node, u64 alignment)
{
u64 rem;
if (!alignment)
return 0;
div64_u64_rem(node->start, alignment, &rem);
return rem;
}
static bool assert_node(struct drm_mm_node *node, struct drm_mm *mm,
u64 size, u64 alignment, unsigned long color)
{
bool ok = true;
if (!drm_mm_node_allocated(node) || node->mm != mm) {
pr_err("node not allocated\n");
ok = false;
}
if (node->size != size) {
pr_err("node has wrong size, found %llu, expected %llu\n",
node->size, size);
ok = false;
}
if (misalignment(node, alignment)) {
pr_err("node is misalinged, start %llx rem %llu, expected alignment %llu\n",
node->start, misalignment(node, alignment), alignment);
ok = false;
}
if (node->color != color) {
pr_err("node has wrong color, found %lu, expected %lu\n",
node->color, color);
ok = false;
}
return ok;
}
static int igt_init(void *ignored)
{
const unsigned int size = 4096;
struct drm_mm mm;
struct drm_mm_node tmp;
int ret = -EINVAL;
/* Start with some simple checks on initialising the struct drm_mm */
memset(&mm, 0, sizeof(mm));
if (drm_mm_initialized(&mm)) {
pr_err("zeroed mm claims to be initialized\n");
return ret;
}
memset(&mm, 0xff, sizeof(mm));
drm_mm_init(&mm, 0, size);
if (!drm_mm_initialized(&mm)) {
pr_err("mm claims not to be initialized\n");
goto out;
}
if (!drm_mm_clean(&mm)) {
pr_err("mm not empty on creation\n");
goto out;
}
/* After creation, it should all be one massive hole */
if (!assert_one_hole(&mm, 0, size)) {
ret = -EINVAL;
goto out;
}
memset(&tmp, 0, sizeof(tmp));
tmp.start = 0;
tmp.size = size;
ret = drm_mm_reserve_node(&mm, &tmp);
if (ret) {
pr_err("failed to reserve whole drm_mm\n");
goto out;
}
/* After filling the range entirely, there should be no holes */
if (!assert_no_holes(&mm)) {
ret = -EINVAL;
goto out;
}
/* And then after emptying it again, the massive hole should be back */
drm_mm_remove_node(&tmp);
if (!assert_one_hole(&mm, 0, size)) {
ret = -EINVAL;
goto out;
}
out:
if (ret)
drm_mm_debug_table(&mm, __func__);
drm_mm_takedown(&mm);
return ret;
}
static int igt_debug(void *ignored)
{
struct drm_mm mm;
struct drm_mm_node nodes[2];
int ret;
/* Create a small drm_mm with a couple of nodes and a few holes, and
* check that the debug iterator doesn't explode over a trivial drm_mm.
*/
drm_mm_init(&mm, 0, 4096);
memset(nodes, 0, sizeof(nodes));
nodes[0].start = 512;
nodes[0].size = 1024;
ret = drm_mm_reserve_node(&mm, &nodes[0]);
if (ret) {
pr_err("failed to reserve node[0] {start=%lld, size=%lld)\n",
nodes[0].start, nodes[0].size);
return ret;
}
nodes[1].size = 1024;
nodes[1].start = 4096 - 512 - nodes[1].size;
ret = drm_mm_reserve_node(&mm, &nodes[1]);
if (ret) {
pr_err("failed to reserve node[1] {start=%lld, size=%lld)\n",
nodes[1].start, nodes[1].size);
return ret;
}
drm_mm_debug_table(&mm, __func__);
return 0;
}
static struct drm_mm_node *set_node(struct drm_mm_node *node,
u64 start, u64 size)
{
node->start = start;
node->size = size;
return node;
}
static bool expect_reserve_fail(struct drm_mm *mm, struct drm_mm_node *node)
{
int err;
err = drm_mm_reserve_node(mm, node);
if (likely(err == -ENOSPC))
return true;
if (!err) {
pr_err("impossible reserve succeeded, node %llu + %llu\n",
node->start, node->size);
drm_mm_remove_node(node);
} else {
pr_err("impossible reserve failed with wrong error %d [expected %d], node %llu + %llu\n",
err, -ENOSPC, node->start, node->size);
}
return false;
}
static bool check_reserve_boundaries(struct drm_mm *mm,
unsigned int count,
u64 size)
{
const struct boundary {
u64 start, size;
const char *name;
} boundaries[] = {
#define B(st, sz) { (st), (sz), "{ " #st ", " #sz "}" }
B(0, 0),
B(-size, 0),
B(size, 0),
B(size * count, 0),
B(-size, size),
B(-size, -size),
B(-size, 2*size),
B(0, -size),
B(size, -size),
B(count*size, size),
B(count*size, -size),
B(count*size, count*size),
B(count*size, -count*size),
B(count*size, -(count+1)*size),
B((count+1)*size, size),
B((count+1)*size, -size),
B((count+1)*size, -2*size),
#undef B
};
struct drm_mm_node tmp = {};
int n;
for (n = 0; n < ARRAY_SIZE(boundaries); n++) {
if (!expect_reserve_fail(mm,
set_node(&tmp,
boundaries[n].start,
boundaries[n].size))) {
pr_err("boundary[%d:%s] failed, count=%u, size=%lld\n",
n, boundaries[n].name, count, size);
return false;
}
}
return true;
}
static int __igt_reserve(unsigned int count, u64 size)
{
DRM_RND_STATE(prng, random_seed);
struct drm_mm mm;
struct drm_mm_node tmp, *nodes, *node, *next;
unsigned int *order, n, m, o = 0;
int ret, err;
/* For exercising drm_mm_reserve_node(), we want to check that
* reservations outside of the drm_mm range are rejected, and to
* overlapping and otherwise already occupied ranges. Afterwards,
* the tree and nodes should be intact.
*/
DRM_MM_BUG_ON(!count);
DRM_MM_BUG_ON(!size);
ret = -ENOMEM;
order = drm_random_order(count, &prng);
if (!order)
goto err;
nodes = vzalloc(sizeof(*nodes) * count);
if (!nodes)
goto err_order;
ret = -EINVAL;
drm_mm_init(&mm, 0, count * size);
if (!check_reserve_boundaries(&mm, count, size))
goto out;
for (n = 0; n < count; n++) {
nodes[n].start = order[n] * size;
nodes[n].size = size;
err = drm_mm_reserve_node(&mm, &nodes[n]);
if (err) {
pr_err("reserve failed, step %d, start %llu\n",
n, nodes[n].start);
ret = err;
goto out;
}
if (!drm_mm_node_allocated(&nodes[n])) {
pr_err("reserved node not allocated! step %d, start %llu\n",
n, nodes[n].start);
goto out;
}
if (!expect_reserve_fail(&mm, &nodes[n]))
goto out;
}
/* After random insertion the nodes should be in order */
if (!assert_continuous(&mm, size))
goto out;
/* Repeated use should then fail */
drm_random_reorder(order, count, &prng);
for (n = 0; n < count; n++) {
if (!expect_reserve_fail(&mm,
set_node(&tmp, order[n] * size, 1)))
goto out;
/* Remove and reinsert should work */
drm_mm_remove_node(&nodes[order[n]]);
err = drm_mm_reserve_node(&mm, &nodes[order[n]]);
if (err) {
pr_err("reserve failed, step %d, start %llu\n",
n, nodes[n].start);
ret = err;
goto out;
}
}
if (!assert_continuous(&mm, size))
goto out;
/* Overlapping use should then fail */
for (n = 0; n < count; n++) {
if (!expect_reserve_fail(&mm, set_node(&tmp, 0, size*count)))
goto out;
}
for (n = 0; n < count; n++) {
if (!expect_reserve_fail(&mm,
set_node(&tmp,
size * n,
size * (count - n))))
goto out;
}
/* Remove several, reinsert, check full */
for_each_prime_number(n, min(max_prime, count)) {
for (m = 0; m < n; m++) {
node = &nodes[order[(o + m) % count]];
drm_mm_remove_node(node);
}
for (m = 0; m < n; m++) {
node = &nodes[order[(o + m) % count]];
err = drm_mm_reserve_node(&mm, node);
if (err) {
pr_err("reserve failed, step %d/%d, start %llu\n",
m, n, node->start);
ret = err;
goto out;
}
}
o += n;
if (!assert_continuous(&mm, size))
goto out;
}
ret = 0;
out:
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
drm_mm_takedown(&mm);
vfree(nodes);
err_order:
kfree(order);
err:
return ret;
}
static int igt_reserve(void *ignored)
{
const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
int n, ret;
for_each_prime_number_from(n, 1, 54) {
u64 size = BIT_ULL(n);
ret = __igt_reserve(count, size - 1);
if (ret)
return ret;
ret = __igt_reserve(count, size);
if (ret)
return ret;
ret = __igt_reserve(count, size + 1);
if (ret)
return ret;
}
return 0;
}
static bool expect_insert(struct drm_mm *mm, struct drm_mm_node *node,
u64 size, u64 alignment, unsigned long color,
const struct insert_mode *mode)
{
int err;
err = drm_mm_insert_node_generic(mm, node,
size, alignment, color,
mode->search_flags,
mode->create_flags);
if (err) {
pr_err("insert (size=%llu, alignment=%llu, color=%lu, mode=%s) failed with err=%d\n",
size, alignment, color, mode->name, err);
return false;
}
if (!assert_node(node, mm, size, alignment, color)) {
drm_mm_remove_node(node);
return false;
}
return true;
}
static bool expect_insert_fail(struct drm_mm *mm, u64 size)
{
struct drm_mm_node tmp = {};
int err;
err = drm_mm_insert_node(mm, &tmp, size, 0, DRM_MM_SEARCH_DEFAULT);
if (likely(err == -ENOSPC))
return true;
if (!err) {
pr_err("impossible insert succeeded, node %llu + %llu\n",
tmp.start, tmp.size);
drm_mm_remove_node(&tmp);
} else {
pr_err("impossible insert failed with wrong error %d [expected %d], size %llu\n",
err, -ENOSPC, size);
}
return false;
}
static int __igt_insert(unsigned int count, u64 size, bool replace)
{
DRM_RND_STATE(prng, random_seed);
const struct insert_mode *mode;
struct drm_mm mm;
struct drm_mm_node *nodes, *node, *next;
unsigned int *order, n, m, o = 0;
int ret;
/* Fill a range with lots of nodes, check it doesn't fail too early */
DRM_MM_BUG_ON(!count);
DRM_MM_BUG_ON(!size);
ret = -ENOMEM;
nodes = vmalloc(count * sizeof(*nodes));
if (!nodes)
goto err;
order = drm_random_order(count, &prng);
if (!order)
goto err_nodes;
ret = -EINVAL;
drm_mm_init(&mm, 0, count * size);
for (mode = insert_modes; mode->name; mode++) {
for (n = 0; n < count; n++) {
struct drm_mm_node tmp;
node = replace ? &tmp : &nodes[n];
memset(node, 0, sizeof(*node));
if (!expect_insert(&mm, node, size, 0, n, mode)) {
pr_err("%s insert failed, size %llu step %d\n",
mode->name, size, n);
goto out;
}
if (replace) {
drm_mm_replace_node(&tmp, &nodes[n]);
if (drm_mm_node_allocated(&tmp)) {
pr_err("replaced old-node still allocated! step %d\n",
n);
goto out;
}
if (!assert_node(&nodes[n], &mm, size, 0, n)) {
pr_err("replaced node did not inherit parameters, size %llu step %d\n",
size, n);
goto out;
}
if (tmp.start != nodes[n].start) {
pr_err("replaced node mismatch location expected [%llx + %llx], found [%llx + %llx]\n",
tmp.start, size,
nodes[n].start, nodes[n].size);
goto out;
}
}
}
/* After random insertion the nodes should be in order */
if (!assert_continuous(&mm, size))
goto out;
/* Repeated use should then fail */
if (!expect_insert_fail(&mm, size))
goto out;
/* Remove one and reinsert, as the only hole it should refill itself */
for (n = 0; n < count; n++) {
u64 addr = nodes[n].start;
drm_mm_remove_node(&nodes[n]);
if (!expect_insert(&mm, &nodes[n], size, 0, n, mode)) {
pr_err("%s reinsert failed, size %llu step %d\n",
mode->name, size, n);
goto out;
}
if (nodes[n].start != addr) {
pr_err("%s reinsert node moved, step %d, expected %llx, found %llx\n",
mode->name, n, addr, nodes[n].start);
goto out;
}
if (!assert_continuous(&mm, size))
goto out;
}
/* Remove several, reinsert, check full */
for_each_prime_number(n, min(max_prime, count)) {
for (m = 0; m < n; m++) {
node = &nodes[order[(o + m) % count]];
drm_mm_remove_node(node);
}
for (m = 0; m < n; m++) {
node = &nodes[order[(o + m) % count]];
if (!expect_insert(&mm, node, size, 0, n, mode)) {
pr_err("%s multiple reinsert failed, size %llu step %d\n",
mode->name, size, n);
goto out;
}
}
o += n;
if (!assert_continuous(&mm, size))
goto out;
if (!expect_insert_fail(&mm, size))
goto out;
}
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
DRM_MM_BUG_ON(!drm_mm_clean(&mm));
}
ret = 0;
out:
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
drm_mm_takedown(&mm);
kfree(order);
err_nodes:
vfree(nodes);
err:
return ret;
}
static int igt_insert(void *ignored)
{
const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
unsigned int n;
int ret;
for_each_prime_number_from(n, 1, 54) {
u64 size = BIT_ULL(n);
ret = __igt_insert(count, size - 1, false);
if (ret)
return ret;
ret = __igt_insert(count, size, false);
if (ret)
return ret;
ret = __igt_insert(count, size + 1, false);
}
return 0;
}
static int igt_replace(void *ignored)
{
const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
unsigned int n;
int ret;
/* Reuse igt_insert to exercise replacement by inserting a dummy node,
* then replacing it with the intended node. We want to check that
* the tree is intact and all the information we need is carried
* across to the target node.
*/
for_each_prime_number_from(n, 1, 54) {
u64 size = BIT_ULL(n);
ret = __igt_insert(count, size - 1, true);
if (ret)
return ret;
ret = __igt_insert(count, size, true);
if (ret)
return ret;
ret = __igt_insert(count, size + 1, true);
}
return 0;
}
static bool expect_insert_in_range(struct drm_mm *mm, struct drm_mm_node *node,
u64 size, u64 alignment, unsigned long color,
u64 range_start, u64 range_end,
const struct insert_mode *mode)
{
int err;
err = drm_mm_insert_node_in_range_generic(mm, node,
size, alignment, color,
range_start, range_end,
mode->search_flags,
mode->create_flags);
if (err) {
pr_err("insert (size=%llu, alignment=%llu, color=%lu, mode=%s) nto range [%llx, %llx] failed with err=%d\n",
size, alignment, color, mode->name,
range_start, range_end, err);
return false;
}
if (!assert_node(node, mm, size, alignment, color)) {
drm_mm_remove_node(node);
return false;
}
return true;
}
static bool expect_insert_in_range_fail(struct drm_mm *mm,
u64 size,
u64 range_start,
u64 range_end)
{
struct drm_mm_node tmp = {};
int err;
err = drm_mm_insert_node_in_range_generic(mm, &tmp,
size, 0, 0,
range_start, range_end,
DRM_MM_SEARCH_DEFAULT,
DRM_MM_CREATE_DEFAULT);
if (likely(err == -ENOSPC))
return true;
if (!err) {
pr_err("impossible insert succeeded, node %llx + %llu, range [%llx, %llx]\n",
tmp.start, tmp.size, range_start, range_end);
drm_mm_remove_node(&tmp);
} else {
pr_err("impossible insert failed with wrong error %d [expected %d], size %llu, range [%llx, %llx]\n",
err, -ENOSPC, size, range_start, range_end);
}
return false;
}
static bool assert_contiguous_in_range(struct drm_mm *mm,
u64 size,
u64 start,
u64 end)
{
struct drm_mm_node *node;
unsigned int n;
if (!expect_insert_in_range_fail(mm, size, start, end))
return false;
n = div64_u64(start + size - 1, size);
drm_mm_for_each_node(node, mm) {
if (node->start < start || node->start + node->size > end) {
pr_err("node %d out of range, address [%llx + %llu], range [%llx, %llx]\n",
n, node->start, node->start + node->size, start, end);
return false;
}
if (node->start != n * size) {
pr_err("node %d out of order, expected start %llx, found %llx\n",
n, n * size, node->start);
return false;
}
if (node->size != size) {
pr_err("node %d has wrong size, expected size %llx, found %llx\n",
n, size, node->size);
return false;
}
if (node->hole_follows && drm_mm_hole_node_end(node) < end) {
pr_err("node %d is followed by a hole!\n", n);
return false;
}
n++;
}
drm_mm_for_each_node_in_range(node, mm, 0, start) {
if (node) {
pr_err("node before start: node=%llx+%llu, start=%llx\n",
node->start, node->size, start);
return false;
}
}
drm_mm_for_each_node_in_range(node, mm, end, U64_MAX) {
if (node) {
pr_err("node after end: node=%llx+%llu, end=%llx\n",
node->start, node->size, end);
return false;
}
}
return true;
}
static int __igt_insert_range(unsigned int count, u64 size, u64 start, u64 end)
{
const struct insert_mode *mode;
struct drm_mm mm;
struct drm_mm_node *nodes, *node, *next;
unsigned int n, start_n, end_n;
int ret;
DRM_MM_BUG_ON(!count);
DRM_MM_BUG_ON(!size);
DRM_MM_BUG_ON(end <= start);
/* Very similar to __igt_insert(), but now instead of populating the
* full range of the drm_mm, we try to fill a small portion of it.
*/
ret = -ENOMEM;
nodes = vzalloc(count * sizeof(*nodes));
if (!nodes)
goto err;
ret = -EINVAL;
drm_mm_init(&mm, 0, count * size);
start_n = div64_u64(start + size - 1, size);
end_n = div64_u64(end - size, size);
for (mode = insert_modes; mode->name; mode++) {
for (n = start_n; n <= end_n; n++) {
if (!expect_insert_in_range(&mm, &nodes[n],
size, size, n,
start, end, mode)) {
pr_err("%s insert failed, size %llu, step %d [%d, %d], range [%llx, %llx]\n",
mode->name, size, n,
start_n, end_n,
start, end);
goto out;
}
}
if (!assert_contiguous_in_range(&mm, size, start, end)) {
pr_err("%s: range [%llx, %llx] not full after initialisation, size=%llu\n",
mode->name, start, end, size);
goto out;
}
/* Remove one and reinsert, it should refill itself */
for (n = start_n; n <= end_n; n++) {
u64 addr = nodes[n].start;
drm_mm_remove_node(&nodes[n]);
if (!expect_insert_in_range(&mm, &nodes[n],
size, size, n,
start, end, mode)) {
pr_err("%s reinsert failed, step %d\n", mode->name, n);
goto out;
}
if (nodes[n].start != addr) {
pr_err("%s reinsert node moved, step %d, expected %llx, found %llx\n",
mode->name, n, addr, nodes[n].start);
goto out;
}
}
if (!assert_contiguous_in_range(&mm, size, start, end)) {
pr_err("%s: range [%llx, %llx] not full after reinsertion, size=%llu\n",
mode->name, start, end, size);
goto out;
}
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
DRM_MM_BUG_ON(!drm_mm_clean(&mm));
}
ret = 0;
out:
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
drm_mm_takedown(&mm);
vfree(nodes);
err:
return ret;
}
static int insert_outside_range(void)
{
struct drm_mm mm;
const unsigned int start = 1024;
const unsigned int end = 2048;
const unsigned int size = end - start;
drm_mm_init(&mm, start, size);
if (!expect_insert_in_range_fail(&mm, 1, 0, start))
return -EINVAL;
if (!expect_insert_in_range_fail(&mm, size,
start - size/2, start + (size+1)/2))
return -EINVAL;
if (!expect_insert_in_range_fail(&mm, size,
end - (size+1)/2, end + size/2))
return -EINVAL;
if (!expect_insert_in_range_fail(&mm, 1, end, end + size))
return -EINVAL;
drm_mm_takedown(&mm);
return 0;
}
static int igt_insert_range(void *ignored)
{
const unsigned int count = min_t(unsigned int, BIT(13), max_iterations);
unsigned int n;
int ret;
/* Check that requests outside the bounds of drm_mm are rejected. */
ret = insert_outside_range();
if (ret)
return ret;
for_each_prime_number_from(n, 1, 50) {
const u64 size = BIT_ULL(n);
const u64 max = count * size;
ret = __igt_insert_range(count, size, 0, max);
if (ret)
return ret;
ret = __igt_insert_range(count, size, 1, max);
if (ret)
return ret;
ret = __igt_insert_range(count, size, 0, max - 1);
if (ret)
return ret;
ret = __igt_insert_range(count, size, 0, max/2);
if (ret)
return ret;
ret = __igt_insert_range(count, size, max/2, max);
if (ret)
return ret;
ret = __igt_insert_range(count, size, max/4+1, 3*max/4-1);
if (ret)
return ret;
}
return 0;
}
static int igt_align(void *ignored)
{
const struct insert_mode *mode;
const unsigned int max_count = min(8192u, max_prime);
struct drm_mm mm;
struct drm_mm_node *nodes, *node, *next;
unsigned int prime;
int ret = -EINVAL;
/* For each of the possible insertion modes, we pick a few
* arbitrary alignments and check that the inserted node
* meets our requirements.
*/
nodes = vzalloc(max_count * sizeof(*nodes));
if (!nodes)
goto err;
drm_mm_init(&mm, 1, U64_MAX - 2);
for (mode = insert_modes; mode->name; mode++) {
unsigned int i = 0;
for_each_prime_number_from(prime, 1, max_count) {
u64 size = next_prime_number(prime);
if (!expect_insert(&mm, &nodes[i],
size, prime, i,
mode)) {
pr_err("%s insert failed with alignment=%d",
mode->name, prime);
goto out;
}
i++;
}
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
DRM_MM_BUG_ON(!drm_mm_clean(&mm));
}
ret = 0;
out:
drm_mm_for_each_node_safe(node, next, &mm)
drm_mm_remove_node(node);
drm_mm_takedown(&mm);
vfree(nodes);
err:
return ret;
}
static int igt_align_pot(int max)
{
struct drm_mm mm;
struct drm_mm_node *node, *next;
int bit;
int ret = -EINVAL;
/* Check that we can align to the full u64 address space */
drm_mm_init(&mm, 1, U64_MAX - 2);
for (bit = max - 1; bit; bit--) {
u64 align, size;
node = kzalloc(sizeof(*node), GFP_KERNEL);
if (!node) {
ret = -ENOMEM;
goto out;
}
align = BIT_ULL(bit);
size = BIT_ULL(bit-1) + 1;
if (!expect_insert(&mm, node,
size, align, bit,
&insert_modes[0])) {
pr_err("insert failed with alignment=%llx [%d]",
align, bit);
goto out;
}
}
ret = 0;
out:
drm_mm_for_each_node_safe(node, next, &mm) {
drm_mm_remove_node(node);
kfree(node);
}
drm_mm_takedown(&mm);
return ret;
}
static int igt_align32(void *ignored)
{
return igt_align_pot(32);
}
static int igt_align64(void *ignored)
{
return igt_align_pot(64);
}
#include "drm_selftest.c"
static int __init test_drm_mm_init(void)
{
int err;
while (!random_seed)
random_seed = get_random_int();
pr_info("Testing DRM range manger (struct drm_mm), with random_seed=0x%x max_iterations=%u max_prime=%u\n",
random_seed, max_iterations, max_prime);
err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);
return err > 0 ? 0 : err;
}
static void __exit test_drm_mm_exit(void)
{
}
module_init(test_drm_mm_init);
module_exit(test_drm_mm_exit);
module_param(random_seed, uint, 0400);
module_param(max_iterations, uint, 0400);
module_param(max_prime, uint, 0400);
MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("GPL");