Open source GPL/LGPL release

drivers/gpu/nvgpu/common/ecc.c

@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2018-2021, 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/gk20a.h>
+#include <nvgpu/gr/gr_ecc.h>
+#include <nvgpu/ltc.h>
+
+void nvgpu_ecc_stat_add(struct gk20a *g, struct nvgpu_ecc_stat *stat)
+{
+	struct nvgpu_ecc *ecc = &g->ecc;
+
+	nvgpu_init_list_node(&stat->node);
+
+	nvgpu_mutex_acquire(&ecc->stats_lock);
+
+	nvgpu_list_add_tail(&stat->node, &ecc->stats_list);
+	ecc->stats_count = nvgpu_safe_add_s32(ecc->stats_count, 1);
+
+	nvgpu_mutex_release(&ecc->stats_lock);
+}
+
+void nvgpu_ecc_stat_del(struct gk20a *g, struct nvgpu_ecc_stat *stat)
+{
+	struct nvgpu_ecc *ecc = &g->ecc;
+
+	nvgpu_mutex_acquire(&ecc->stats_lock);
+
+	nvgpu_list_del(&stat->node);
+	ecc->stats_count = nvgpu_safe_sub_s32(ecc->stats_count, 1);
+
+	nvgpu_mutex_release(&ecc->stats_lock);
+}
+
+int nvgpu_ecc_counter_init(struct gk20a *g,
+		struct nvgpu_ecc_stat **statp, const char *name)
+{
+	struct nvgpu_ecc_stat *stat;
+
+	stat = nvgpu_kzalloc(g, sizeof(*stat));
+	if (stat == NULL) {
+		nvgpu_err(g, "ecc counter alloc failed");
+		return -ENOMEM;
+	}
+
+	(void)strncpy(stat->name, name, NVGPU_ECC_STAT_NAME_MAX_SIZE - 1U);
+	nvgpu_ecc_stat_add(g, stat);
+	*statp = stat;
+	return 0;
+}
+
+void nvgpu_ecc_counter_deinit(struct gk20a *g, struct nvgpu_ecc_stat **statp)
+{
+	struct nvgpu_ecc_stat *stat;
+
+	if (*statp == NULL) {
+		return;
+	}
+
+	stat = *statp;
+
+	nvgpu_ecc_stat_del(g, stat);
+	nvgpu_kfree(g, stat);
+	*statp = NULL;
+}
+
+/* release all ecc_stat */
+void nvgpu_ecc_free(struct gk20a *g)
+{
+	struct nvgpu_ecc *ecc = &g->ecc;
+
+	nvgpu_gr_ecc_free(g);
+	nvgpu_ltc_ecc_free(g);
+
+	if (g->ops.fb.ecc.free != NULL) {
+		g->ops.fb.ecc.free(g);
+	}
+
+#ifdef CONFIG_NVGPU_DGPU
+	if (g->ops.fb.fbpa_ecc_free != NULL) {
+		g->ops.fb.fbpa_ecc_free(g);
+	}
+#endif
+
+	if (g->ops.pmu.ecc_free != NULL) {
+		g->ops.pmu.ecc_free(g);
+	}
+
+	nvgpu_mutex_acquire(&ecc->stats_lock);
+	WARN_ON(!nvgpu_list_empty(&ecc->stats_list));
+	nvgpu_mutex_release(&ecc->stats_lock);
+
+	(void)memset(ecc, 0, sizeof(*ecc));
+}
+
+int nvgpu_ecc_init_support(struct gk20a *g)
+{
+	struct nvgpu_ecc *ecc = &g->ecc;
+
+	if (ecc->initialized) {
+		return 0;
+	}
+
+	nvgpu_mutex_init(&ecc->stats_lock);
+	nvgpu_init_list_node(&ecc->stats_list);
+
+	return 0;
+}
+
+/**
+ * Note that this function is to be called after all units requiring ecc stats
+ * have added entries to ecc->stats_list.
+ */
+int nvgpu_ecc_finalize_support(struct gk20a *g)
+{
+#ifdef CONFIG_NVGPU_SYSFS
+	int err;
+#endif
+
+	if (g->ecc.initialized) {
+		return 0;
+	}
+
+#ifdef CONFIG_NVGPU_SYSFS
+	err = nvgpu_ecc_sysfs_init(g);
+	if (err != 0) {
+		nvgpu_ecc_free(g);
+		return err;
+	}
+#endif
+
+	g->ecc.initialized = true;
+
+	return 0;
+}
+
+void nvgpu_ecc_remove_support(struct gk20a *g)
+{
+	if (!g->ecc.initialized) {
+		return;
+	}
+
+#ifdef CONFIG_NVGPU_SYSFS
+	nvgpu_ecc_sysfs_remove(g);
+#endif
+	nvgpu_ecc_free(g);
+
+	nvgpu_mutex_destroy(&g->ecc.stats_lock);
+}