Mock test filling an address space with 4K and 64K objects, in the hope
of exercising the page color adjust fun.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 68 +++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index c7963efe46ba..9b2a7228a78f 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -31,6 +31,7 @@
#include "mock_context.h"
#include "mock_drm.h"
#include "mock_gem_device.h"
+#include "mock_gtt.h"
static void fake_free_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages)
@@ -1306,6 +1307,72 @@ static int igt_gtt_reserve(void *arg)
return err;
}
+static int igt_ppgtt_page_color(void *arg)
+{
+ struct drm_mm mm;
+ struct drm_mm_node *node, *prev, *next;
+ unsigned long page_colors[] = {
+ I915_GTT_PAGE_SIZE,
+ I915_GTT_PAGE_SIZE_64K,
+ };
+ int idx = 0;
+ u64 count = 0;
+ u64 size;
+
+ drm_mm_init(&mm, 0, U64_MAX);
+ mm.color_adjust = i915_page_color_adjust;
+
+ /* Running out of memory is okay. */
+
+ for_each_prime_number_from(size, 0, U64_MAX) {
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (!node) {
+ pr_info("finished test early, unable to allocate node, count=%llu\n", count);
+ break;
+ }
+
+ size = roundup(size, page_colors[idx]);
+
+ if (drm_mm_insert_node_in_range(&mm, node, size,
+ page_colors[idx],
+ page_colors[idx],
+ 0, U64_MAX,
+ DRM_MM_INSERT_BEST)) {
+ pr_info("test finished, unable to insert node: color=%lu, size=%llx, count=%llu\n",
+ page_colors[idx], size, count);
+ kfree(node);
+ break;
+ }
+
+ GEM_BUG_ON(!IS_ALIGNED(node->start, node->color));
+ GEM_BUG_ON(!IS_ALIGNED(node->size, node->color));
+
+ /* We can't mix 4K and 64K pte's in the same pt. */
+
+ prev = list_prev_entry(node, node_list);
+ if (i915_color_differs(prev, node->color))
+ GEM_BUG_ON(prev->start >> GEN8_PDE_SHIFT ==
+ node->start >> GEN8_PDE_SHIFT);
+
+ next = list_next_entry(node, node_list);
+ if (i915_color_differs(next, node->color))
+ GEM_BUG_ON(((next->start + next->size) >> GEN8_PDE_SHIFT) ==
+ ((node->start + node->size) >> GEN8_PDE_SHIFT));
+
+ idx ^= 1;
+ ++count;
+ }
+
+ drm_mm_for_each_node_safe(node, next, &mm) {
+ drm_mm_remove_node(node);
+ kfree(node);
+ }
+
+ drm_mm_takedown(&mm);
+
+ return 0;
+}
+
static int igt_gtt_insert(void *arg)
{
struct drm_i915_private *i915 = arg;
@@ -1522,6 +1589,7 @@ int i915_gem_gtt_mock_selftests(void)
SUBTEST(igt_mock_fill),
SUBTEST(igt_gtt_reserve),
SUBTEST(igt_gtt_insert),
+ SUBTEST(igt_ppgtt_page_color),
};
struct drm_i915_private *i915;
int err;
--
2.9.3
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