drm/i915: Add initial selftests for i915_gem_gtt

Simple starting point for adding selftests for i915_gem_gtt, first
try creating a ppGTT and filling it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-27-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 520bcf6..9daea3c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3760,4 +3760,5 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
 
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftests/mock_gtt.c"
+#include "selftests/i915_gem_gtt.c"
 #endif

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
new file mode 100644 (file)
index 0000000..f3359be
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "../i915_selftest.h"
+
+static int igt_ppgtt_alloc(void *arg)
+{
+       struct drm_i915_private *dev_priv = arg;
+       struct i915_hw_ppgtt *ppgtt;
+       u64 size, last;
+       int err;
+
+       /* Allocate a ppggt and try to fill the entire range */
+
+       if (!USES_PPGTT(dev_priv))
+               return 0;
+
+       ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
+       if (!ppgtt)
+               return -ENOMEM;
+
+       mutex_lock(&dev_priv->drm.struct_mutex);
+       err = __hw_ppgtt_init(ppgtt, dev_priv);
+       if (err)
+               goto err_ppgtt;
+
+       if (!ppgtt->base.allocate_va_range)
+               goto err_ppgtt_cleanup;
+
+       /* Check we can allocate the entire range */
+       for (size = 4096;
+            size <= ppgtt->base.total;
+            size <<= 2) {
+               err = ppgtt->base.allocate_va_range(&ppgtt->base, 0, size);
+               if (err) {
+                       if (err == -ENOMEM) {
+                               pr_info("[1] Ran out of memory for va_range [0 + %llx] [bit %d]\n",
+                                       size, ilog2(size));
+                               err = 0; /* virtual space too large! */
+                       }
+                       goto err_ppgtt_cleanup;
+               }
+
+               ppgtt->base.clear_range(&ppgtt->base, 0, size);
+       }
+
+       /* Check we can incrementally allocate the entire range */
+       for (last = 0, size = 4096;
+            size <= ppgtt->base.total;
+            last = size, size <<= 2) {
+               err = ppgtt->base.allocate_va_range(&ppgtt->base,
+                                                   last, size - last);
+               if (err) {
+                       if (err == -ENOMEM) {
+                               pr_info("[2] Ran out of memory for va_range [%llx + %llx] [bit %d]\n",
+                                       last, size - last, ilog2(size));
+                               err = 0; /* virtual space too large! */
+                       }
+                       goto err_ppgtt_cleanup;
+               }
+       }
+
+err_ppgtt_cleanup:
+       ppgtt->base.cleanup(&ppgtt->base);
+err_ppgtt:
+       mutex_unlock(&dev_priv->drm.struct_mutex);
+       kfree(ppgtt);
+       return err;
+}
+
+int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
+{
+       static const struct i915_subtest tests[] = {
+               SUBTEST(igt_ppgtt_alloc),
+       };
+
+       return i915_subtests(tests, i915);
+}

diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
index fc60569..d6c869c 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -14,3 +14,4 @@ selftest(requests, i915_gem_request_live_selftests)
 selftest(objects, i915_gem_object_live_selftests)
 selftest(dmabuf, i915_gem_dmabuf_live_selftests)
 selftest(coherency, i915_gem_coherency_live_selftests)
+selftest(gtt, i915_gem_gtt_live_selftests)