Open source GPL/LGPL release

drivers/gpu/nvgpu/common/utils/errata.c

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 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 <nvgpu/errata.h>
+#include <nvgpu/bitops.h>
+#include <nvgpu/log.h>
+#include <nvgpu/gk20a.h>
+#include <nvgpu/static_analysis.h>
+#include <nvgpu/utils.h>
+
+/**
+ * Array of flag names
+ */
+#define DEFINE_ERRATA(flag, chip, desc) [flag] = nvgpu_stringify(flag)
+static const char *errata_flag_names[NVGPU_MAX_ERRATA_BITS + 1U] = {
+	ERRATA_FLAGS_NEXT
+	ERRATA_FLAGS
+};
+#undef DEFINE_ERRATA
+
+/**
+ * Array of flag descriptions
+ */
+#define DEFINE_ERRATA(flag, chip, desc) [flag] = desc
+static const char *errata_flag_desc[NVGPU_MAX_ERRATA_BITS + 1U] = {
+	ERRATA_FLAGS_NEXT
+	ERRATA_FLAGS
+};
+#undef DEFINE_ERRATA
+
+/**
+ * Array of chips where errata was first discovered
+ */
+#define DEFINE_ERRATA(flag, chip, desc) [flag] = chip
+static const char *errata_flag_chip[NVGPU_MAX_ERRATA_BITS + 1U] = {
+	ERRATA_FLAGS_NEXT
+	ERRATA_FLAGS
+};
+#undef DEFINE_ERRATA
+
+void nvgpu_print_errata_flags(struct gk20a *g)
+{
+	u32 i;
+
+	nvgpu_log(g, gpu_dbg_info, "NVGPU Erratas present in chip");
+	nvgpu_log(g, gpu_dbg_info, "%-55.55s %-5.5s %s",
+			"Flag", "Chip", "Description");
+	nvgpu_log(g, gpu_dbg_info, "%-55.55s %-5.5s %s",
+			"----", "-----", "-----------");
+
+	for (i = 0U; i < U32(NVGPU_MAX_ERRATA_BITS); i++) {
+		/* Only print erratas present in chip */
+		if (nvgpu_is_errata_present(g, i)) {
+			nvgpu_log(g, gpu_dbg_info, "%-55.55s %-5.5s %s",
+			errata_flag_names[i],
+			errata_flag_chip[i],
+			errata_flag_desc[i]);
+		}
+	}
+}
+
+int nvgpu_init_errata_flags(struct gk20a *g)
+{
+	/*
+	 * Zero all flags initially. Flags that should be set to non-zero states
+	 * can be done so during hal init.
+	 */
+	g->errata_flags = nvgpu_kzalloc(g,
+				BITS_TO_LONGS(U32(NVGPU_MAX_ERRATA_BITS)) *
+				sizeof(unsigned long));
+	if (g->errata_flags == NULL) {
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+/*
+ * Call this on driver shutdown!
+ */
+void nvgpu_free_errata_flags(struct gk20a *g)
+{
+	nvgpu_kfree(g, g->errata_flags);
+}
+
+bool nvgpu_is_errata_present(struct gk20a *g, u32 flag)
+{
+	if (flag < NVGPU_MAX_ERRATA_BITS) {
+		return nvgpu_test_bit(flag, g->errata_flags);
+	} else {
+		return 0;
+	}
+}
+
+void nvgpu_set_errata(struct gk20a *g, u32 flag, bool state)
+{
+	if (flag >= NVGPU_MAX_ERRATA_BITS) {
+		return;
+	}
+
+	if (state) {
+		nvgpu_set_bit(flag, g->errata_flags);
+	} else {
+		nvgpu_clear_bit(flag, g->errata_flags);
+	}
+}