#include "../lib/drm_random.h"
-static unsigned int random_seed;
-static unsigned int max_iterations = 8192;
-static unsigned int max_prime = 128;
-
enum {
BEST,
BOTTOMUP,
[TOPDOWN] = { "top-down", DRM_MM_INSERT_HIGH },
[EVICT] = { "evict", DRM_MM_INSERT_EVICT },
{}
-}, evict_modes[] = {
- { "bottom-up", DRM_MM_INSERT_LOW },
- { "top-down", DRM_MM_INSERT_HIGH },
- {}
};
static bool assert_no_holes(struct kunit *test, const struct drm_mm *mm)
return ok;
}
-static bool assert_continuous(struct kunit *test, const struct drm_mm *mm, u64 size)
-{
- struct drm_mm_node *node, *check, *found;
- unsigned long n;
- u64 addr;
-
- if (!assert_no_holes(test, mm))
- return false;
-
- n = 0;
- addr = 0;
- drm_mm_for_each_node(node, mm) {
- if (node->start != addr) {
- KUNIT_FAIL(test, "node[%ld] list out of order, expected %llx found %llx\n",
- n, addr, node->start);
- return false;
- }
-
- if (node->size != size) {
- KUNIT_FAIL(test, "node[%ld].size incorrect, expected %llx, found %llx\n",
- n, size, node->size);
- return false;
- }
-
- if (drm_mm_hole_follows(node)) {
- KUNIT_FAIL(test, "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) {
- KUNIT_FAIL(test,
- "lookup return wrong node, expected start %llx, found %llx\n",
- node->start, check->start);
- return false;
- }
- found = check;
- }
- if (!found) {
- KUNIT_FAIL(test, "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;
KUNIT_SUCCEED(test);
}
-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 kunit *test, 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) {
- KUNIT_FAIL(test, "impossible reserve succeeded, node %llu + %llu\n",
- node->start, node->size);
- drm_mm_remove_node(node);
- } else {
- KUNIT_FAIL(test,
- "impossible reserve failed with wrong error %d [expected %d], node %llu + %llu\n",
- err, -ENOSPC, node->start, node->size);
- }
- return false;
-}
-
-static bool noinline_for_stack check_reserve_boundaries(struct kunit *test, 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(test, mm, set_node(&tmp, boundaries[n].start,
- boundaries[n].size))) {
- KUNIT_FAIL(test, "boundary[%d:%s] failed, count=%u, size=%lld\n",
- n, boundaries[n].name, count, size);
- return false;
- }
- }
-
- return true;
-}
-
-static int __drm_test_mm_reserve(struct kunit *test, 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(array_size(count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- ret = -EINVAL;
- drm_mm_init(&mm, 0, count * size);
-
- if (!check_reserve_boundaries(test, &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) {
- KUNIT_FAIL(test, "reserve failed, step %d, start %llu\n",
- n, nodes[n].start);
- ret = err;
- goto out;
- }
-
- if (!drm_mm_node_allocated(&nodes[n])) {
- KUNIT_FAIL(test, "reserved node not allocated! step %d, start %llu\n",
- n, nodes[n].start);
- goto out;
- }
-
- if (!expect_reserve_fail(test, &mm, &nodes[n]))
- goto out;
- }
-
- /* After random insertion the nodes should be in order */
- if (!assert_continuous(test, &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(test, &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) {
- KUNIT_FAIL(test, "reserve failed, step %d, start %llu\n",
- n, nodes[n].start);
- ret = err;
- goto out;
- }
- }
-
- if (!assert_continuous(test, &mm, size))
- goto out;
-
- /* Overlapping use should then fail */
- for (n = 0; n < count; n++) {
- if (!expect_reserve_fail(test, &mm, set_node(&tmp, 0, size * count)))
- goto out;
- }
- for (n = 0; n < count; n++) {
- if (!expect_reserve_fail(test, &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) {
- KUNIT_FAIL(test, "reserve failed, step %d/%d, start %llu\n",
- m, n, node->start);
- ret = err;
- goto out;
- }
- }
-
- o += n;
-
- if (!assert_continuous(test, &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);
- kfree(order);
-err:
- return ret;
-}
-
-static void drm_test_mm_reserve(struct kunit *test)
-{
- const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
- int n;
-
- for_each_prime_number_from(n, 1, 54) {
- u64 size = BIT_ULL(n);
-
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_reserve(test, count, size - 1));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_reserve(test, count, size));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_reserve(test, count, size + 1));
-
- cond_resched();
- }
-}
-
static bool expect_insert(struct kunit *test, struct drm_mm *mm,
struct drm_mm_node *node, u64 size, u64 alignment, unsigned long color,
const struct insert_mode *mode)
return true;
}
-static bool expect_insert_fail(struct kunit *test, struct drm_mm *mm, u64 size)
-{
- struct drm_mm_node tmp = {};
- int err;
-
- err = drm_mm_insert_node(mm, &tmp, size);
- if (likely(err == -ENOSPC))
- return true;
-
- if (!err) {
- KUNIT_FAIL(test, "impossible insert succeeded, node %llu + %llu\n",
- tmp.start, tmp.size);
- drm_mm_remove_node(&tmp);
- } else {
- KUNIT_FAIL(test,
- "impossible insert failed with wrong error %d [expected %d], size %llu\n",
- err, -ENOSPC, size);
- }
- return false;
-}
-
-static int __drm_test_mm_insert(struct kunit *test, unsigned int count, u64 size, bool replace)
+static void drm_test_mm_align_pot(struct kunit *test, int max)
{
- 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(array_size(count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- 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(test, &mm, node, size, 0, n, mode)) {
- KUNIT_FAIL(test, "%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)) {
- KUNIT_FAIL(test,
- "replaced old-node still allocated! step %d\n",
- n);
- goto out;
- }
-
- if (!assert_node(test, &nodes[n], &mm, size, 0, n)) {
- KUNIT_FAIL(test,
- "replaced node did not inherit parameters, size %llu step %d\n",
- size, n);
- goto out;
- }
-
- if (tmp.start != nodes[n].start) {
- KUNIT_FAIL(test,
- "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(test, &mm, size))
- goto out;
-
- /* Repeated use should then fail */
- if (!expect_insert_fail(test, &mm, size))
- goto out;
+ struct drm_mm_node *node, *next;
+ int bit;
- /* Remove one and reinsert, as the only hole it should refill itself */
- for (n = 0; n < count; n++) {
- u64 addr = nodes[n].start;
+ /* Check that we can align to the full u64 address space */
- drm_mm_remove_node(&nodes[n]);
- if (!expect_insert(test, &mm, &nodes[n], size, 0, n, mode)) {
- KUNIT_FAIL(test, "%s reinsert failed, size %llu step %d\n",
- mode->name, size, n);
- goto out;
- }
+ drm_mm_init(&mm, 1, U64_MAX - 2);
- if (nodes[n].start != addr) {
- KUNIT_FAIL(test,
- "%s reinsert node moved, step %d, expected %llx, found %llx\n",
- mode->name, n, addr, nodes[n].start);
- goto out;
- }
+ for (bit = max - 1; bit; bit--) {
+ u64 align, size;
- if (!assert_continuous(test, &mm, size))
- goto out;
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (!node) {
+ KUNIT_FAIL(test, "failed to allocate node");
+ 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(test, &mm, node, size, 0, n, mode)) {
- KUNIT_FAIL(test,
- "%s multiple reinsert failed, size %llu step %d\n",
- mode->name, size, n);
- goto out;
- }
- }
-
- o += n;
-
- if (!assert_continuous(test, &mm, size))
- goto out;
-
- if (!expect_insert_fail(test, &mm, size))
- goto out;
+ align = BIT_ULL(bit);
+ size = BIT_ULL(bit - 1) + 1;
+ if (!expect_insert(test, &mm, node, size, align, bit, &insert_modes[0])) {
+ KUNIT_FAIL(test, "insert failed with alignment=%llx [%d]", align, bit);
+ goto out;
}
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- DRM_MM_BUG_ON(!drm_mm_clean(&mm));
-
cond_resched();
}
- ret = 0;
out:
- drm_mm_for_each_node_safe(node, next, &mm)
+ drm_mm_for_each_node_safe(node, next, &mm) {
drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- kfree(order);
-err_nodes:
- vfree(nodes);
- return ret;
-}
-
-static void drm_test_mm_insert(struct kunit *test)
-{
- const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
- unsigned int n;
-
- for_each_prime_number_from(n, 1, 54) {
- u64 size = BIT_ULL(n);
-
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size - 1, false));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size, false));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size + 1, false));
-
- cond_resched();
+ kfree(node);
}
+ drm_mm_takedown(&mm);
}
-static void drm_test_mm_replace(struct kunit *test)
+static void drm_test_mm_align32(struct kunit *test)
{
- const unsigned int count = min_t(unsigned int, BIT(10), max_iterations);
- unsigned int n;
-
- /* Reuse __drm_test_mm_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);
-
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size - 1, true));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size, true));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert(test, count, size + 1, true));
-
- cond_resched();
- }
+ drm_test_mm_align_pot(test, 32);
}
-static bool expect_insert_in_range(struct kunit *test, 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)
+static void drm_test_mm_align64(struct kunit *test)
{
- int err;
-
- err = drm_mm_insert_node_in_range(mm, node,
- size, alignment, color,
- range_start, range_end,
- mode->mode);
- if (err) {
- KUNIT_FAIL(test,
- "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(test, node, mm, size, alignment, color)) {
- drm_mm_remove_node(node);
- return false;
- }
-
- return true;
+ drm_test_mm_align_pot(test, 64);
}
-static bool expect_insert_in_range_fail(struct kunit *test, struct drm_mm *mm,
- u64 size, u64 range_start, u64 range_end)
+static void drm_test_mm_once(struct kunit *test, unsigned int mode)
{
- struct drm_mm_node tmp = {};
- int err;
+ struct drm_mm mm;
+ struct drm_mm_node rsvd_lo, rsvd_hi, node;
- err = drm_mm_insert_node_in_range(mm, &tmp, size, 0, 0, range_start, range_end,
- 0);
- if (likely(err == -ENOSPC))
- return true;
+ drm_mm_init(&mm, 0, 7);
- if (!err) {
- KUNIT_FAIL(test,
- "impossible insert succeeded, node %llx + %llu, range [%llx, %llx]\n",
- tmp.start, tmp.size, range_start, range_end);
- drm_mm_remove_node(&tmp);
- } else {
- KUNIT_FAIL(test,
- "impossible insert failed with wrong error %d [expected %d], size %llu, range [%llx, %llx]\n",
- err, -ENOSPC, size, range_start, range_end);
+ memset(&rsvd_lo, 0, sizeof(rsvd_lo));
+ rsvd_lo.start = 1;
+ rsvd_lo.size = 1;
+ if (drm_mm_reserve_node(&mm, &rsvd_lo)) {
+ KUNIT_FAIL(test, "Could not reserve low node\n");
+ goto err;
}
- return false;
-}
-
-static bool assert_contiguous_in_range(struct kunit *test, struct drm_mm *mm,
- u64 size, u64 start, u64 end)
-{
- struct drm_mm_node *node;
- unsigned int n;
-
- if (!expect_insert_in_range_fail(test, 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) {
- KUNIT_FAIL(test,
- "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) {
- KUNIT_FAIL(test, "node %d out of order, expected start %llx, found %llx\n",
- n, n * size, node->start);
- return false;
- }
-
- if (node->size != size) {
- KUNIT_FAIL(test, "node %d has wrong size, expected size %llx, found %llx\n",
- n, size, node->size);
- return false;
- }
-
- if (drm_mm_hole_follows(node) && drm_mm_hole_node_end(node) < end) {
- KUNIT_FAIL(test, "node %d is followed by a hole!\n", n);
- return false;
- }
-
- n++;
+ memset(&rsvd_hi, 0, sizeof(rsvd_hi));
+ rsvd_hi.start = 5;
+ rsvd_hi.size = 1;
+ if (drm_mm_reserve_node(&mm, &rsvd_hi)) {
+ KUNIT_FAIL(test, "Could not reserve low node\n");
+ goto err_lo;
}
- if (start > 0) {
- node = __drm_mm_interval_first(mm, 0, start - 1);
- if (drm_mm_node_allocated(node)) {
- KUNIT_FAIL(test, "node before start: node=%llx+%llu, start=%llx\n",
- node->start, node->size, start);
- return false;
- }
+ if (!drm_mm_hole_follows(&rsvd_lo) || !drm_mm_hole_follows(&rsvd_hi)) {
+ KUNIT_FAIL(test, "Expected a hole after lo and high nodes!\n");
+ goto err_hi;
}
- if (end < U64_MAX) {
- node = __drm_mm_interval_first(mm, end, U64_MAX);
- if (drm_mm_node_allocated(node)) {
- KUNIT_FAIL(test, "node after end: node=%llx+%llu, end=%llx\n",
- node->start, node->size, end);
- return false;
- }
+ memset(&node, 0, sizeof(node));
+ if (drm_mm_insert_node_generic(&mm, &node, 2, 0, 0, mode)) {
+ KUNIT_FAIL(test, "Could not insert the node into the available hole!\n");
+ goto err_hi;
}
- return true;
+ drm_mm_remove_node(&node);
+err_hi:
+ drm_mm_remove_node(&rsvd_hi);
+err_lo:
+ drm_mm_remove_node(&rsvd_lo);
+err:
+ drm_mm_takedown(&mm);
}
-static int __drm_test_mm_insert_range(struct kunit *test, unsigned int count, u64 size,
- u64 start, u64 end)
+static void drm_test_mm_lowest(struct kunit *test)
{
- 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 __drm_test_mm_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(array_size(count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- 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(test, &mm, &nodes[n], size, size, n,
- start, end, mode)) {
- KUNIT_FAIL(test,
- "%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(test, &mm, size, start, end)) {
- KUNIT_FAIL(test,
- "%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(test, &mm, &nodes[n], size, size, n,
- start, end, mode)) {
- KUNIT_FAIL(test, "%s reinsert failed, step %d\n", mode->name, n);
- goto out;
- }
-
- if (nodes[n].start != addr) {
- KUNIT_FAIL(test,
- "%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(test, &mm, size, start, end)) {
- KUNIT_FAIL(test,
- "%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));
-
- cond_resched();
- }
-
- ret = 0;
-out:
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- vfree(nodes);
- return ret;
-}
-
-static int insert_outside_range(struct kunit *test)
-{
- 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(test, &mm, 1, 0, start))
- return -EINVAL;
-
- if (!expect_insert_in_range_fail(test, &mm, size,
- start - size / 2, start + (size + 1) / 2))
- return -EINVAL;
-
- if (!expect_insert_in_range_fail(test, &mm, size,
- end - (size + 1) / 2, end + size / 2))
- return -EINVAL;
-
- if (!expect_insert_in_range_fail(test, &mm, 1, end, end + size))
- return -EINVAL;
-
- drm_mm_takedown(&mm);
- return 0;
-}
-
-static void drm_test_mm_insert_range(struct kunit *test)
-{
- const unsigned int count = min_t(unsigned int, BIT(13), max_iterations);
- unsigned int n;
-
- /* Check that requests outside the bounds of drm_mm are rejected. */
- KUNIT_ASSERT_FALSE(test, insert_outside_range(test));
-
- for_each_prime_number_from(n, 1, 50) {
- const u64 size = BIT_ULL(n);
- const u64 max = count * size;
-
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 0, max));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 1, max));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 0, max - 1));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size, 0, max / 2));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size,
- max / 2, max));
- KUNIT_ASSERT_FALSE(test, __drm_test_mm_insert_range(test, count, size,
- max / 4 + 1, 3 * max / 4 - 1));
-
- cond_resched();
- }
-}
-
-static int prepare_frag(struct kunit *test, struct drm_mm *mm, struct drm_mm_node *nodes,
- unsigned int num_insert, const struct insert_mode *mode)
-{
- unsigned int size = 4096;
- unsigned int i;
-
- for (i = 0; i < num_insert; i++) {
- if (!expect_insert(test, mm, &nodes[i], size, 0, i, mode) != 0) {
- KUNIT_FAIL(test, "%s insert failed\n", mode->name);
- return -EINVAL;
- }
- }
-
- /* introduce fragmentation by freeing every other node */
- for (i = 0; i < num_insert; i++) {
- if (i % 2 == 0)
- drm_mm_remove_node(&nodes[i]);
- }
-
- return 0;
-}
-
-static u64 get_insert_time(struct kunit *test, struct drm_mm *mm,
- unsigned int num_insert, struct drm_mm_node *nodes,
- const struct insert_mode *mode)
-{
- unsigned int size = 8192;
- ktime_t start;
- unsigned int i;
-
- start = ktime_get();
- for (i = 0; i < num_insert; i++) {
- if (!expect_insert(test, mm, &nodes[i], size, 0, i, mode) != 0) {
- KUNIT_FAIL(test, "%s insert failed\n", mode->name);
- return 0;
- }
- }
-
- return ktime_to_ns(ktime_sub(ktime_get(), start));
-}
-
-static void drm_test_mm_frag(struct kunit *test)
-{
- struct drm_mm mm;
- const struct insert_mode *mode;
- struct drm_mm_node *nodes, *node, *next;
- unsigned int insert_size = 10000;
- unsigned int scale_factor = 4;
-
- /* We need 4 * insert_size nodes to hold intermediate allocated
- * drm_mm nodes.
- * 1 times for prepare_frag()
- * 1 times for get_insert_time()
- * 2 times for get_insert_time()
- */
- nodes = vzalloc(array_size(insert_size * 4, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- /* For BOTTOMUP and TOPDOWN, we first fragment the
- * address space using prepare_frag() and then try to verify
- * that insertions scale quadratically from 10k to 20k insertions
- */
- drm_mm_init(&mm, 1, U64_MAX - 2);
- for (mode = insert_modes; mode->name; mode++) {
- u64 insert_time1, insert_time2;
-
- if (mode->mode != DRM_MM_INSERT_LOW &&
- mode->mode != DRM_MM_INSERT_HIGH)
- continue;
-
- if (prepare_frag(test, &mm, nodes, insert_size, mode))
- goto err;
-
- insert_time1 = get_insert_time(test, &mm, insert_size,
- nodes + insert_size, mode);
- if (insert_time1 == 0)
- goto err;
-
- insert_time2 = get_insert_time(test, &mm, (insert_size * 2),
- nodes + insert_size * 2, mode);
- if (insert_time2 == 0)
- goto err;
-
- kunit_info(test, "%s fragmented insert of %u and %u insertions took %llu and %llu nsecs\n",
- mode->name, insert_size, insert_size * 2, insert_time1, insert_time2);
-
- if (insert_time2 > (scale_factor * insert_time1)) {
- KUNIT_FAIL(test, "%s fragmented insert took %llu nsecs more\n",
- mode->name, insert_time2 - (scale_factor * insert_time1));
- goto err;
- }
-
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- }
-
-err:
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- vfree(nodes);
-}
-
-static void drm_test_mm_align(struct kunit *test)
-{
- 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;
-
- /* For each of the possible insertion modes, we pick a few
- * arbitrary alignments and check that the inserted node
- * meets our requirements.
- */
-
- nodes = vzalloc(array_size(max_count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- 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(test, &mm, &nodes[i], size, prime, i, mode)) {
- KUNIT_FAIL(test, "%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));
-
- cond_resched();
- }
-
-out:
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- vfree(nodes);
-}
-
-static void drm_test_mm_align_pot(struct kunit *test, int max)
-{
- struct drm_mm mm;
- struct drm_mm_node *node, *next;
- int bit;
-
- /* 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) {
- KUNIT_FAIL(test, "failed to allocate node");
- goto out;
- }
-
- align = BIT_ULL(bit);
- size = BIT_ULL(bit - 1) + 1;
- if (!expect_insert(test, &mm, node, size, align, bit, &insert_modes[0])) {
- KUNIT_FAIL(test, "insert failed with alignment=%llx [%d]", align, bit);
- goto out;
- }
-
- cond_resched();
- }
-
-out:
- drm_mm_for_each_node_safe(node, next, &mm) {
- drm_mm_remove_node(node);
- kfree(node);
- }
- drm_mm_takedown(&mm);
-}
-
-static void drm_test_mm_align32(struct kunit *test)
-{
- drm_test_mm_align_pot(test, 32);
-}
-
-static void drm_test_mm_align64(struct kunit *test)
-{
- drm_test_mm_align_pot(test, 64);
-}
-
-static void show_scan(struct kunit *test, const struct drm_mm_scan *scan)
-{
- kunit_info(test, "scan: hit [%llx, %llx], size=%lld, align=%lld, color=%ld\n",
- scan->hit_start, scan->hit_end, scan->size, scan->alignment, scan->color);
-}
-
-static void show_holes(struct kunit *test, const struct drm_mm *mm, int count)
-{
- u64 hole_start, hole_end;
- struct drm_mm_node *hole;
-
- drm_mm_for_each_hole(hole, mm, hole_start, hole_end) {
- struct drm_mm_node *next = list_next_entry(hole, node_list);
- const char *node1 = NULL, *node2 = NULL;
-
- if (drm_mm_node_allocated(hole))
- node1 = kasprintf(GFP_KERNEL, "[%llx + %lld, color=%ld], ",
- hole->start, hole->size, hole->color);
-
- if (drm_mm_node_allocated(next))
- node2 = kasprintf(GFP_KERNEL, ", [%llx + %lld, color=%ld]",
- next->start, next->size, next->color);
-
- kunit_info(test, "%sHole [%llx - %llx, size %lld]%s\n", node1,
- hole_start, hole_end, hole_end - hole_start, node2);
-
- kfree(node2);
- kfree(node1);
-
- if (!--count)
- break;
- }
-}
-
-struct evict_node {
- struct drm_mm_node node;
- struct list_head link;
-};
-
-static bool evict_nodes(struct kunit *test, struct drm_mm_scan *scan,
- struct evict_node *nodes, unsigned int *order, unsigned int count,
- bool use_color, struct list_head *evict_list)
-{
- struct evict_node *e, *en;
- unsigned int i;
-
- for (i = 0; i < count; i++) {
- e = &nodes[order ? order[i] : i];
- list_add(&e->link, evict_list);
- if (drm_mm_scan_add_block(scan, &e->node))
- break;
- }
- list_for_each_entry_safe(e, en, evict_list, link) {
- if (!drm_mm_scan_remove_block(scan, &e->node))
- list_del(&e->link);
- }
- if (list_empty(evict_list)) {
- KUNIT_FAIL(test,
- "Failed to find eviction: size=%lld [avail=%d], align=%lld (color=%lu)\n",
- scan->size, count, scan->alignment, scan->color);
- return false;
- }
-
- list_for_each_entry(e, evict_list, link)
- drm_mm_remove_node(&e->node);
-
- if (use_color) {
- struct drm_mm_node *node;
-
- while ((node = drm_mm_scan_color_evict(scan))) {
- e = container_of(node, typeof(*e), node);
- drm_mm_remove_node(&e->node);
- list_add(&e->link, evict_list);
- }
- } else {
- if (drm_mm_scan_color_evict(scan)) {
- KUNIT_FAIL(test,
- "drm_mm_scan_color_evict unexpectedly reported overlapping nodes!\n");
- return false;
- }
- }
-
- return true;
-}
-
-static bool evict_nothing(struct kunit *test, struct drm_mm *mm,
- unsigned int total_size, struct evict_node *nodes)
-{
- struct drm_mm_scan scan;
- LIST_HEAD(evict_list);
- struct evict_node *e;
- struct drm_mm_node *node;
- unsigned int n;
-
- drm_mm_scan_init(&scan, mm, 1, 0, 0, 0);
- for (n = 0; n < total_size; n++) {
- e = &nodes[n];
- list_add(&e->link, &evict_list);
- drm_mm_scan_add_block(&scan, &e->node);
- }
- list_for_each_entry(e, &evict_list, link)
- drm_mm_scan_remove_block(&scan, &e->node);
-
- for (n = 0; n < total_size; n++) {
- e = &nodes[n];
-
- if (!drm_mm_node_allocated(&e->node)) {
- KUNIT_FAIL(test, "node[%d] no longer allocated!\n", n);
- return false;
- }
-
- e->link.next = NULL;
- }
-
- drm_mm_for_each_node(node, mm) {
- e = container_of(node, typeof(*e), node);
- e->link.next = &e->link;
- }
-
- for (n = 0; n < total_size; n++) {
- e = &nodes[n];
-
- if (!e->link.next) {
- KUNIT_FAIL(test, "node[%d] no longer connected!\n", n);
- return false;
- }
- }
-
- return assert_continuous(test, mm, nodes[0].node.size);
-}
-
-static bool evict_everything(struct kunit *test, struct drm_mm *mm,
- unsigned int total_size, struct evict_node *nodes)
-{
- struct drm_mm_scan scan;
- LIST_HEAD(evict_list);
- struct evict_node *e;
- unsigned int n;
- int err;
-
- drm_mm_scan_init(&scan, mm, total_size, 0, 0, 0);
- for (n = 0; n < total_size; n++) {
- e = &nodes[n];
- list_add(&e->link, &evict_list);
- if (drm_mm_scan_add_block(&scan, &e->node))
- break;
- }
-
- err = 0;
- list_for_each_entry(e, &evict_list, link) {
- if (!drm_mm_scan_remove_block(&scan, &e->node)) {
- if (!err) {
- KUNIT_FAIL(test, "Node %lld not marked for eviction!\n",
- e->node.start);
- err = -EINVAL;
- }
- }
- }
- if (err)
- return false;
-
- list_for_each_entry(e, &evict_list, link)
- drm_mm_remove_node(&e->node);
-
- if (!assert_one_hole(test, mm, 0, total_size))
- return false;
-
- list_for_each_entry(e, &evict_list, link) {
- err = drm_mm_reserve_node(mm, &e->node);
- if (err) {
- KUNIT_FAIL(test, "Failed to reinsert node after eviction: start=%llx\n",
- e->node.start);
- return false;
- }
- }
-
- return assert_continuous(test, mm, nodes[0].node.size);
-}
-
-static int evict_something(struct kunit *test, struct drm_mm *mm,
- u64 range_start, u64 range_end, struct evict_node *nodes,
- unsigned int *order, unsigned int count, unsigned int size,
- unsigned int alignment, const struct insert_mode *mode)
-{
- struct drm_mm_scan scan;
- LIST_HEAD(evict_list);
- struct evict_node *e;
- struct drm_mm_node tmp;
- int err;
-
- drm_mm_scan_init_with_range(&scan, mm, size, alignment, 0, range_start,
- range_end, mode->mode);
- if (!evict_nodes(test, &scan, nodes, order, count, false, &evict_list))
- return -EINVAL;
-
- memset(&tmp, 0, sizeof(tmp));
- err = drm_mm_insert_node_generic(mm, &tmp, size, alignment, 0,
- DRM_MM_INSERT_EVICT);
- if (err) {
- KUNIT_FAIL(test, "Failed to insert into eviction hole: size=%d, align=%d\n",
- size, alignment);
- show_scan(test, &scan);
- show_holes(test, mm, 3);
- return err;
- }
-
- if (tmp.start < range_start || tmp.start + tmp.size > range_end) {
- KUNIT_FAIL(test,
- "Inserted [address=%llu + %llu] did not fit into the request range [%llu, %llu]\n",
- tmp.start, tmp.size, range_start, range_end);
- err = -EINVAL;
- }
-
- if (!assert_node(test, &tmp, mm, size, alignment, 0) ||
- drm_mm_hole_follows(&tmp)) {
- KUNIT_FAIL(test,
- "Inserted did not fill the eviction hole: size=%lld [%d], align=%d [rem=%lld], start=%llx, hole-follows?=%d\n",
- tmp.size, size, alignment, misalignment(&tmp, alignment),
- tmp.start, drm_mm_hole_follows(&tmp));
- err = -EINVAL;
- }
-
- drm_mm_remove_node(&tmp);
- if (err)
- return err;
-
- list_for_each_entry(e, &evict_list, link) {
- err = drm_mm_reserve_node(mm, &e->node);
- if (err) {
- KUNIT_FAIL(test, "Failed to reinsert node after eviction: start=%llx\n",
- e->node.start);
- return err;
- }
- }
-
- if (!assert_continuous(test, mm, nodes[0].node.size)) {
- KUNIT_FAIL(test, "range is no longer continuous\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
-static void drm_test_mm_evict(struct kunit *test)
-{
- DRM_RND_STATE(prng, random_seed);
- const unsigned int size = 8192;
- const struct insert_mode *mode;
- struct drm_mm mm;
- struct evict_node *nodes;
- struct drm_mm_node *node, *next;
- unsigned int *order, n;
-
- /* Here we populate a full drm_mm and then try and insert a new node
- * by evicting other nodes in a random order. The drm_mm_scan should
- * pick the first matching hole it finds from the random list. We
- * repeat that for different allocation strategies, alignments and
- * sizes to try and stress the hole finder.
- */
-
- nodes = vzalloc(array_size(size, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- order = drm_random_order(size, &prng);
- if (!order)
- goto err_nodes;
-
- drm_mm_init(&mm, 0, size);
- for (n = 0; n < size; n++) {
- if (drm_mm_insert_node(&mm, &nodes[n].node, 1)) {
- KUNIT_FAIL(test, "insert failed, step %d\n", n);
- goto out;
- }
- }
-
- /* First check that using the scanner doesn't break the mm */
- if (!evict_nothing(test, &mm, size, nodes)) {
- KUNIT_FAIL(test, "evict_nothing() failed\n");
- goto out;
- }
- if (!evict_everything(test, &mm, size, nodes)) {
- KUNIT_FAIL(test, "evict_everything() failed\n");
- goto out;
- }
-
- for (mode = evict_modes; mode->name; mode++) {
- for (n = 1; n <= size; n <<= 1) {
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, 0, U64_MAX, nodes, order, size, n, 1,
- mode)) {
- KUNIT_FAIL(test, "%s evict_something(size=%u) failed\n",
- mode->name, n);
- goto out;
- }
- }
-
- for (n = 1; n < size; n <<= 1) {
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, 0, U64_MAX, nodes, order, size,
- size / 2, n, mode)) {
- KUNIT_FAIL(test,
- "%s evict_something(size=%u, alignment=%u) failed\n",
- mode->name, size / 2, n);
- goto out;
- }
- }
-
- for_each_prime_number_from(n, 1, min(size, max_prime)) {
- unsigned int nsize = (size - n + 1) / 2;
-
- DRM_MM_BUG_ON(!nsize);
-
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, 0, U64_MAX, nodes, order, size,
- nsize, n, mode)) {
- KUNIT_FAIL(test,
- "%s evict_something(size=%u, alignment=%u) failed\n",
- mode->name, nsize, n);
- goto out;
- }
- }
-
- cond_resched();
- }
-
-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);
-}
-
-static void drm_test_mm_evict_range(struct kunit *test)
-{
- DRM_RND_STATE(prng, random_seed);
- const unsigned int size = 8192;
- const unsigned int range_size = size / 2;
- const unsigned int range_start = size / 4;
- const unsigned int range_end = range_start + range_size;
- const struct insert_mode *mode;
- struct drm_mm mm;
- struct evict_node *nodes;
- struct drm_mm_node *node, *next;
- unsigned int *order, n;
-
- /* Like drm_test_mm_evict() but now we are limiting the search to a
- * small portion of the full drm_mm.
- */
-
- nodes = vzalloc(array_size(size, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- order = drm_random_order(size, &prng);
- if (!order)
- goto err_nodes;
-
- drm_mm_init(&mm, 0, size);
- for (n = 0; n < size; n++) {
- if (drm_mm_insert_node(&mm, &nodes[n].node, 1)) {
- KUNIT_FAIL(test, "insert failed, step %d\n", n);
- goto out;
- }
- }
-
- for (mode = evict_modes; mode->name; mode++) {
- for (n = 1; n <= range_size; n <<= 1) {
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, range_start, range_end, nodes,
- order, size, n, 1, mode)) {
- KUNIT_FAIL(test,
- "%s evict_something(size=%u) failed with range [%u, %u]\n",
- mode->name, n, range_start, range_end);
- goto out;
- }
- }
-
- for (n = 1; n <= range_size; n <<= 1) {
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, range_start, range_end, nodes,
- order, size, range_size / 2, n, mode)) {
- KUNIT_FAIL(test,
- "%s evict_something(size=%u, alignment=%u) failed with range [%u, %u]\n",
- mode->name, range_size / 2, n, range_start, range_end);
- goto out;
- }
- }
-
- for_each_prime_number_from(n, 1, min(range_size, max_prime)) {
- unsigned int nsize = (range_size - n + 1) / 2;
-
- DRM_MM_BUG_ON(!nsize);
-
- drm_random_reorder(order, size, &prng);
- if (evict_something(test, &mm, range_start, range_end, nodes,
- order, size, nsize, n, mode)) {
- KUNIT_FAIL(test,
- "%s evict_something(size=%u, alignment=%u) failed with range [%u, %u]\n",
- mode->name, nsize, n, range_start, range_end);
- goto out;
- }
- }
-
- cond_resched();
- }
-
-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);
-}
-
-static unsigned int node_index(const struct drm_mm_node *node)
-{
- return div64_u64(node->start, node->size);
-}
-
-static void drm_test_mm_topdown(struct kunit *test)
-{
- const struct insert_mode *topdown = &insert_modes[TOPDOWN];
-
- DRM_RND_STATE(prng, random_seed);
- const unsigned int count = 8192;
- unsigned int size;
- unsigned long *bitmap;
- struct drm_mm mm;
- struct drm_mm_node *nodes, *node, *next;
- unsigned int *order, n, m, o = 0;
-
- /* When allocating top-down, we expect to be returned a node
- * from a suitable hole at the top of the drm_mm. We check that
- * the returned node does match the highest available slot.
- */
-
- nodes = vzalloc(array_size(count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- bitmap = bitmap_zalloc(count, GFP_KERNEL);
- if (!bitmap)
- goto err_nodes;
-
- order = drm_random_order(count, &prng);
- if (!order)
- goto err_bitmap;
-
- for (size = 1; size <= 64; size <<= 1) {
- drm_mm_init(&mm, 0, size * count);
- for (n = 0; n < count; n++) {
- if (!expect_insert(test, &mm, &nodes[n], size, 0, n, topdown)) {
- KUNIT_FAIL(test, "insert failed, size %u step %d\n", size, n);
- goto out;
- }
-
- if (drm_mm_hole_follows(&nodes[n])) {
- KUNIT_FAIL(test,
- "hole after topdown insert %d, start=%llx\n, size=%u",
- n, nodes[n].start, size);
- goto out;
- }
-
- if (!assert_one_hole(test, &mm, 0, size * (count - n - 1)))
- goto out;
- }
-
- if (!assert_continuous(test, &mm, size))
- goto out;
-
- drm_random_reorder(order, count, &prng);
- for_each_prime_number_from(n, 1, min(count, max_prime)) {
- for (m = 0; m < n; m++) {
- node = &nodes[order[(o + m) % count]];
- drm_mm_remove_node(node);
- __set_bit(node_index(node), bitmap);
- }
-
- for (m = 0; m < n; m++) {
- unsigned int last;
-
- node = &nodes[order[(o + m) % count]];
- if (!expect_insert(test, &mm, node, size, 0, 0, topdown)) {
- KUNIT_FAIL(test, "insert failed, step %d/%d\n", m, n);
- goto out;
- }
-
- if (drm_mm_hole_follows(node)) {
- KUNIT_FAIL(test,
- "hole after topdown insert %d/%d, start=%llx\n",
- m, n, node->start);
- goto out;
- }
-
- last = find_last_bit(bitmap, count);
- if (node_index(node) != last) {
- KUNIT_FAIL(test,
- "node %d/%d, size %d, not inserted into upmost hole, expected %d, found %d\n",
- m, n, size, last, node_index(node));
- goto out;
- }
-
- __clear_bit(last, bitmap);
- }
-
- DRM_MM_BUG_ON(find_first_bit(bitmap, count) != count);
-
- o += n;
- }
-
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- DRM_MM_BUG_ON(!drm_mm_clean(&mm));
- cond_resched();
- }
-
-out:
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- kfree(order);
-err_bitmap:
- bitmap_free(bitmap);
-err_nodes:
- vfree(nodes);
-}
-
-static void drm_test_mm_bottomup(struct kunit *test)
-{
- const struct insert_mode *bottomup = &insert_modes[BOTTOMUP];
-
- DRM_RND_STATE(prng, random_seed);
- const unsigned int count = 8192;
- unsigned int size;
- unsigned long *bitmap;
- struct drm_mm mm;
- struct drm_mm_node *nodes, *node, *next;
- unsigned int *order, n, m, o = 0;
-
- /* Like drm_test_mm_topdown, but instead of searching for the last hole,
- * we search for the first.
- */
-
- nodes = vzalloc(array_size(count, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- bitmap = bitmap_zalloc(count, GFP_KERNEL);
- if (!bitmap)
- goto err_nodes;
-
- order = drm_random_order(count, &prng);
- if (!order)
- goto err_bitmap;
-
- for (size = 1; size <= 64; size <<= 1) {
- drm_mm_init(&mm, 0, size * count);
- for (n = 0; n < count; n++) {
- if (!expect_insert(test, &mm, &nodes[n], size, 0, n, bottomup)) {
- KUNIT_FAIL(test,
- "bottomup insert failed, size %u step %d\n", size, n);
- goto out;
- }
-
- if (!assert_one_hole(test, &mm, size * (n + 1), size * count))
- goto out;
- }
-
- if (!assert_continuous(test, &mm, size))
- goto out;
-
- drm_random_reorder(order, count, &prng);
- for_each_prime_number_from(n, 1, min(count, max_prime)) {
- for (m = 0; m < n; m++) {
- node = &nodes[order[(o + m) % count]];
- drm_mm_remove_node(node);
- __set_bit(node_index(node), bitmap);
- }
-
- for (m = 0; m < n; m++) {
- unsigned int first;
-
- node = &nodes[order[(o + m) % count]];
- if (!expect_insert(test, &mm, node, size, 0, 0, bottomup)) {
- KUNIT_FAIL(test, "insert failed, step %d/%d\n", m, n);
- goto out;
- }
-
- first = find_first_bit(bitmap, count);
- if (node_index(node) != first) {
- KUNIT_FAIL(test,
- "node %d/%d not inserted into bottom hole, expected %d, found %d\n",
- m, n, first, node_index(node));
- goto out;
- }
- __clear_bit(first, bitmap);
- }
-
- DRM_MM_BUG_ON(find_first_bit(bitmap, count) != count);
-
- o += n;
- }
-
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- DRM_MM_BUG_ON(!drm_mm_clean(&mm));
- cond_resched();
- }
-
-out:
- drm_mm_for_each_node_safe(node, next, &mm)
- drm_mm_remove_node(node);
- drm_mm_takedown(&mm);
- kfree(order);
-err_bitmap:
- bitmap_free(bitmap);
-err_nodes:
- vfree(nodes);
-}
-
-static void drm_test_mm_once(struct kunit *test, unsigned int mode)
-{
- struct drm_mm mm;
- struct drm_mm_node rsvd_lo, rsvd_hi, node;
-
- drm_mm_init(&mm, 0, 7);
-
- memset(&rsvd_lo, 0, sizeof(rsvd_lo));
- rsvd_lo.start = 1;
- rsvd_lo.size = 1;
- if (drm_mm_reserve_node(&mm, &rsvd_lo)) {
- KUNIT_FAIL(test, "Could not reserve low node\n");
- goto err;
- }
-
- memset(&rsvd_hi, 0, sizeof(rsvd_hi));
- rsvd_hi.start = 5;
- rsvd_hi.size = 1;
- if (drm_mm_reserve_node(&mm, &rsvd_hi)) {
- KUNIT_FAIL(test, "Could not reserve low node\n");
- goto err_lo;
- }
-
- if (!drm_mm_hole_follows(&rsvd_lo) || !drm_mm_hole_follows(&rsvd_hi)) {
- KUNIT_FAIL(test, "Expected a hole after lo and high nodes!\n");
- goto err_hi;
- }
-
- memset(&node, 0, sizeof(node));
- if (drm_mm_insert_node_generic(&mm, &node, 2, 0, 0, mode)) {
- KUNIT_FAIL(test, "Could not insert the node into the available hole!\n");
- goto err_hi;
- }
-
- drm_mm_remove_node(&node);
-err_hi:
- drm_mm_remove_node(&rsvd_hi);
-err_lo:
- drm_mm_remove_node(&rsvd_lo);
-err:
- drm_mm_takedown(&mm);
-}
-
-static void drm_test_mm_lowest(struct kunit *test)
-{
- drm_test_mm_once(test, DRM_MM_INSERT_LOW);
-}
+ drm_test_mm_once(test, DRM_MM_INSERT_LOW);
+}
static void drm_test_mm_highest(struct kunit *test)
{
drm_test_mm_once(test, DRM_MM_INSERT_HIGH);
}
-static void separate_adjacent_colors(const struct drm_mm_node *node,
- unsigned long color, u64 *start, u64 *end)
-{
- if (drm_mm_node_allocated(node) && node->color != color)
- ++*start;
-
- node = list_next_entry(node, node_list);
- if (drm_mm_node_allocated(node) && node->color != color)
- --*end;
-}
-
-static bool colors_abutt(struct kunit *test, const struct drm_mm_node *node)
-{
- if (!drm_mm_hole_follows(node) &&
- drm_mm_node_allocated(list_next_entry(node, node_list))) {
- KUNIT_FAIL(test, "colors abutt; %ld [%llx + %llx] is next to %ld [%llx + %llx]!\n",
- node->color, node->start, node->size,
- list_next_entry(node, node_list)->color,
- list_next_entry(node, node_list)->start,
- list_next_entry(node, node_list)->size);
- return true;
- }
-
- return false;
-}
-
-static void drm_test_mm_color(struct kunit *test)
-{
- const unsigned int count = min(4096u, max_iterations);
- const struct insert_mode *mode;
- struct drm_mm mm;
- struct drm_mm_node *node, *nn;
- unsigned int n;
-
- /* Color adjustment complicates everything. First we just check
- * that when we insert a node we apply any color_adjustment callback.
- * The callback we use should ensure that there is a gap between
- * any two nodes, and so after each insertion we check that those
- * holes are inserted and that they are preserved.
- */
-
- drm_mm_init(&mm, 0, U64_MAX);
-
- for (n = 1; n <= count; n++) {
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- goto out;
-
- if (!expect_insert(test, &mm, node, n, 0, n, &insert_modes[0])) {
- KUNIT_FAIL(test, "insert failed, step %d\n", n);
- kfree(node);
- goto out;
- }
- }
-
- drm_mm_for_each_node_safe(node, nn, &mm) {
- if (node->color != node->size) {
- KUNIT_FAIL(test, "invalid color stored: expected %lld, found %ld\n",
- node->size, node->color);
-
- goto out;
- }
-
- drm_mm_remove_node(node);
- kfree(node);
- }
-
- /* Now, let's start experimenting with applying a color callback */
- mm.color_adjust = separate_adjacent_colors;
- for (mode = insert_modes; mode->name; mode++) {
- u64 last;
-
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- goto out;
-
- node->size = 1 + 2 * count;
- node->color = node->size;
-
- if (drm_mm_reserve_node(&mm, node)) {
- KUNIT_FAIL(test, "initial reserve failed!\n");
- goto out;
- }
-
- last = node->start + node->size;
-
- for (n = 1; n <= count; n++) {
- int rem;
-
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- goto out;
-
- node->start = last;
- node->size = n + count;
- node->color = node->size;
-
- if (drm_mm_reserve_node(&mm, node) != -ENOSPC) {
- KUNIT_FAIL(test, "reserve %d did not report color overlap!", n);
- goto out;
- }
-
- node->start += n + 1;
- rem = misalignment(node, n + count);
- node->start += n + count - rem;
-
- if (drm_mm_reserve_node(&mm, node)) {
- KUNIT_FAIL(test, "reserve %d failed", n);
- goto out;
- }
-
- last = node->start + node->size;
- }
-
- for (n = 1; n <= count; n++) {
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- goto out;
-
- if (!expect_insert(test, &mm, node, n, n, n, mode)) {
- KUNIT_FAIL(test, "%s insert failed, step %d\n", mode->name, n);
- kfree(node);
- goto out;
- }
- }
-
- drm_mm_for_each_node_safe(node, nn, &mm) {
- u64 rem;
-
- if (node->color != node->size) {
- KUNIT_FAIL(test,
- "%s invalid color stored: expected %lld, found %ld\n",
- mode->name, node->size, node->color);
-
- goto out;
- }
-
- if (colors_abutt(test, node))
- goto out;
-
- div64_u64_rem(node->start, node->size, &rem);
- if (rem) {
- KUNIT_FAIL(test,
- "%s colored node misaligned, start=%llx expected alignment=%lld [rem=%lld]\n",
- mode->name, node->start, node->size, rem);
- goto out;
- }
-
- drm_mm_remove_node(node);
- kfree(node);
- }
-
- cond_resched();
- }
-
-out:
- drm_mm_for_each_node_safe(node, nn, &mm) {
- drm_mm_remove_node(node);
- kfree(node);
- }
- drm_mm_takedown(&mm);
-}
-
-static int evict_color(struct kunit *test, struct drm_mm *mm, u64 range_start,
- u64 range_end, struct evict_node *nodes, unsigned int *order,
- unsigned int count, unsigned int size, unsigned int alignment,
- unsigned long color, const struct insert_mode *mode)
-{
- struct drm_mm_scan scan;
- LIST_HEAD(evict_list);
- struct evict_node *e;
- struct drm_mm_node tmp;
- int err;
-
- drm_mm_scan_init_with_range(&scan, mm, size, alignment, color, range_start,
- range_end, mode->mode);
- if (!evict_nodes(test, &scan, nodes, order, count, true, &evict_list))
- return -EINVAL;
-
- memset(&tmp, 0, sizeof(tmp));
- err = drm_mm_insert_node_generic(mm, &tmp, size, alignment, color,
- DRM_MM_INSERT_EVICT);
- if (err) {
- KUNIT_FAIL(test,
- "Failed to insert into eviction hole: size=%d, align=%d, color=%lu, err=%d\n",
- size, alignment, color, err);
- show_scan(test, &scan);
- show_holes(test, mm, 3);
- return err;
- }
-
- if (tmp.start < range_start || tmp.start + tmp.size > range_end) {
- KUNIT_FAIL(test,
- "Inserted [address=%llu + %llu] did not fit into the request range [%llu, %llu]\n",
- tmp.start, tmp.size, range_start, range_end);
- err = -EINVAL;
- }
-
- if (colors_abutt(test, &tmp))
- err = -EINVAL;
-
- if (!assert_node(test, &tmp, mm, size, alignment, color)) {
- KUNIT_FAIL(test,
- "Inserted did not fit the eviction hole: size=%lld [%d], align=%d [rem=%lld], start=%llx\n",
- tmp.size, size, alignment, misalignment(&tmp, alignment), tmp.start);
- err = -EINVAL;
- }
-
- drm_mm_remove_node(&tmp);
- if (err)
- return err;
-
- list_for_each_entry(e, &evict_list, link) {
- err = drm_mm_reserve_node(mm, &e->node);
- if (err) {
- KUNIT_FAIL(test, "Failed to reinsert node after eviction: start=%llx\n",
- e->node.start);
- return err;
- }
- }
-
- cond_resched();
- return 0;
-}
-
-static void drm_test_mm_color_evict(struct kunit *test)
-{
- DRM_RND_STATE(prng, random_seed);
- const unsigned int total_size = min(8192u, max_iterations);
- const struct insert_mode *mode;
- unsigned long color = 0;
- struct drm_mm mm;
- struct evict_node *nodes;
- struct drm_mm_node *node, *next;
- unsigned int *order, n;
-
- /* Check that the drm_mm_scan also honours color adjustment when
- * choosing its victims to create a hole. Our color_adjust does not
- * allow two nodes to be placed together without an intervening hole
- * enlarging the set of victims that must be evicted.
- */
-
- nodes = vzalloc(array_size(total_size, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- order = drm_random_order(total_size, &prng);
- if (!order)
- goto err_nodes;
-
- drm_mm_init(&mm, 0, 2 * total_size - 1);
- mm.color_adjust = separate_adjacent_colors;
- for (n = 0; n < total_size; n++) {
- if (!expect_insert(test, &mm, &nodes[n].node,
- 1, 0, color++,
- &insert_modes[0])) {
- KUNIT_FAIL(test, "insert failed, step %d\n", n);
- goto out;
- }
- }
-
- for (mode = evict_modes; mode->name; mode++) {
- for (n = 1; n <= total_size; n <<= 1) {
- drm_random_reorder(order, total_size, &prng);
- if (evict_color(test, &mm, 0, U64_MAX, nodes, order, total_size,
- n, 1, color++, mode)) {
- KUNIT_FAIL(test, "%s evict_color(size=%u) failed\n", mode->name, n);
- goto out;
- }
- }
-
- for (n = 1; n < total_size; n <<= 1) {
- drm_random_reorder(order, total_size, &prng);
- if (evict_color(test, &mm, 0, U64_MAX, nodes, order, total_size,
- total_size / 2, n, color++, mode)) {
- KUNIT_FAIL(test, "%s evict_color(size=%u, alignment=%u) failed\n",
- mode->name, total_size / 2, n);
- goto out;
- }
- }
-
- for_each_prime_number_from(n, 1, min(total_size, max_prime)) {
- unsigned int nsize = (total_size - n + 1) / 2;
-
- DRM_MM_BUG_ON(!nsize);
-
- drm_random_reorder(order, total_size, &prng);
- if (evict_color(test, &mm, 0, U64_MAX, nodes, order, total_size,
- nsize, n, color++, mode)) {
- KUNIT_FAIL(test, "%s evict_color(size=%u, alignment=%u) failed\n",
- mode->name, nsize, n);
- goto out;
- }
- }
-
- cond_resched();
- }
-
-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);
-}
-
-static void drm_test_mm_color_evict_range(struct kunit *test)
-{
- DRM_RND_STATE(prng, random_seed);
- const unsigned int total_size = 8192;
- const unsigned int range_size = total_size / 2;
- const unsigned int range_start = total_size / 4;
- const unsigned int range_end = range_start + range_size;
- const struct insert_mode *mode;
- unsigned long color = 0;
- struct drm_mm mm;
- struct evict_node *nodes;
- struct drm_mm_node *node, *next;
- unsigned int *order, n;
-
- /* Like drm_test_mm_color_evict(), but limited to small portion of the full
- * drm_mm range.
- */
-
- nodes = vzalloc(array_size(total_size, sizeof(*nodes)));
- KUNIT_ASSERT_TRUE(test, nodes);
-
- order = drm_random_order(total_size, &prng);
- if (!order)
- goto err_nodes;
-
- drm_mm_init(&mm, 0, 2 * total_size - 1);
- mm.color_adjust = separate_adjacent_colors;
- for (n = 0; n < total_size; n++) {
- if (!expect_insert(test, &mm, &nodes[n].node,
- 1, 0, color++,
- &insert_modes[0])) {
- KUNIT_FAIL(test, "insert failed, step %d\n", n);
- goto out;
- }
- }
-
- for (mode = evict_modes; mode->name; mode++) {
- for (n = 1; n <= range_size; n <<= 1) {
- drm_random_reorder(order, range_size, &prng);
- if (evict_color(test, &mm, range_start, range_end, nodes, order,
- total_size, n, 1, color++, mode)) {
- KUNIT_FAIL(test,
- "%s evict_color(size=%u) failed for range [%x, %x]\n",
- mode->name, n, range_start, range_end);
- goto out;
- }
- }
-
- for (n = 1; n < range_size; n <<= 1) {
- drm_random_reorder(order, total_size, &prng);
- if (evict_color(test, &mm, range_start, range_end, nodes, order,
- total_size, range_size / 2, n, color++, mode)) {
- KUNIT_FAIL(test,
- "%s evict_color(size=%u, alignment=%u) failed for range [%x, %x]\n",
- mode->name, total_size / 2, n, range_start, range_end);
- goto out;
- }
- }
-
- for_each_prime_number_from(n, 1, min(range_size, max_prime)) {
- unsigned int nsize = (range_size - n + 1) / 2;
-
- DRM_MM_BUG_ON(!nsize);
-
- drm_random_reorder(order, total_size, &prng);
- if (evict_color(test, &mm, range_start, range_end, nodes, order,
- total_size, nsize, n, color++, mode)) {
- KUNIT_FAIL(test,
- "%s evict_color(size=%u, alignment=%u) failed for range [%x, %x]\n",
- mode->name, nsize, n, range_start, range_end);
- goto out;
- }
- }
-
- cond_resched();
- }
-
-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);
-}
-
-static int drm_mm_suite_init(struct kunit_suite *suite)
-{
- while (!random_seed)
- random_seed = get_random_u32();
-
- kunit_info(suite,
- "Testing DRM range manager, with random_seed=0x%x max_iterations=%u max_prime=%u\n",
- random_seed, max_iterations, max_prime);
-
- return 0;
-}
-
-module_param(random_seed, uint, 0400);
-module_param(max_iterations, uint, 0400);
-module_param(max_prime, uint, 0400);
-
static struct kunit_case drm_mm_tests[] = {
KUNIT_CASE(drm_test_mm_init),
KUNIT_CASE(drm_test_mm_debug),
- KUNIT_CASE(drm_test_mm_reserve),
- KUNIT_CASE(drm_test_mm_insert),
- KUNIT_CASE(drm_test_mm_replace),
- KUNIT_CASE(drm_test_mm_insert_range),
- KUNIT_CASE(drm_test_mm_frag),
- KUNIT_CASE(drm_test_mm_align),
KUNIT_CASE(drm_test_mm_align32),
KUNIT_CASE(drm_test_mm_align64),
- KUNIT_CASE(drm_test_mm_evict),
- KUNIT_CASE(drm_test_mm_evict_range),
- KUNIT_CASE(drm_test_mm_topdown),
- KUNIT_CASE(drm_test_mm_bottomup),
KUNIT_CASE(drm_test_mm_lowest),
KUNIT_CASE(drm_test_mm_highest),
- KUNIT_CASE(drm_test_mm_color),
- KUNIT_CASE(drm_test_mm_color_evict),
- KUNIT_CASE(drm_test_mm_color_evict_range),
{}
};
static struct kunit_suite drm_mm_test_suite = {
.name = "drm_mm",
- .suite_init = drm_mm_suite_init,
.test_cases = drm_mm_tests,
};
projects / linux-2.6-microblaze.git / blobdiff