drm/i915: Move uncore selfchecks to live selftest infrastructure

Now that the kselftest infrastructure exists, put it to use and add to
it the existing consistency checks on the fw register lookup tables.

v2: s/tabke/table/

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-22-chris@chris-wilson.co.uk

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/selftests/intel_uncore.c b/drivers/gpu/drm/i915/selftests/intel_uncore.c
new file mode 100644
index 000000000000..5f7bd5c9428f
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/intel_uncore.c
@@ -0,0 +1,100 @@
+/*
+ * 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 intel_fw_table_check(struct drm_i915_private *i915)
+{
+	const struct intel_forcewake_range *ranges;
+	unsigned int num_ranges, i;
+	s32 prev;
+
+	ranges = i915->uncore.fw_domains_table;
+	if (!ranges)
+		return 0;
+
+	num_ranges = i915->uncore.fw_domains_table_entries;
+	for (i = 0, prev = -1; i < num_ranges; i++, ranges++) {
+		/* Check that the table is watertight */
+		if (IS_GEN9(i915) && (prev + 1) != (s32)ranges->start) {
+			pr_err("%s: entry[%d]:(%x, %x) is not watertight to previous (%x)\n",
+			       __func__, i, ranges->start, ranges->end, prev);
+			return -EINVAL;
+		}
+
+		/* Check that the table never goes backwards */
+		if (prev >= (s32)ranges->start) {
+			pr_err("%s: entry[%d]:(%x, %x) is less than the previous (%x)\n",
+			       __func__, i, ranges->start, ranges->end, prev);
+			return -EINVAL;
+		}
+
+		/* Check that the entry is valid */
+		if (ranges->start >= ranges->end) {
+			pr_err("%s: entry[%d]:(%x, %x) has negative length\n",
+			       __func__, i, ranges->start, ranges->end);
+			return -EINVAL;
+		}
+
+		prev = ranges->end;
+	}
+
+	return 0;
+}
+
+static int intel_shadow_table_check(void)
+{
+	const i915_reg_t *reg = gen8_shadowed_regs;
+	unsigned int i;
+	s32 prev;
+
+	for (i = 0, prev = -1; i < ARRAY_SIZE(gen8_shadowed_regs); i++, reg++) {
+		u32 offset = i915_mmio_reg_offset(*reg);
+
+		if (prev >= (s32)offset) {
+			pr_err("%s: entry[%d]:(%x) is before previous (%x)\n",
+			       __func__, i, offset, prev);
+			return -EINVAL;
+		}
+
+		prev = offset;
+	}
+
+	return 0;
+}
+
+int intel_uncore_live_selftests(struct drm_i915_private *i915)
+{
+	int err;
+
+	err = intel_fw_table_check(i915);
+	if (err)
+		return err;
+
+	err = intel_shadow_table_check();
+	if (err)
+		return err;
+
+	return 0;
+}