Open source GPL/LGPL release

drivers/gpu/nvgpu/hal/mm/cache/flush_gk20a.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2019-2020, 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/trace.h>
+#include <nvgpu/mm.h>
+#include <nvgpu/io.h>
+#include <nvgpu/gk20a.h>
+#include <nvgpu/nvgpu_init.h>
+#include <nvgpu/timers.h>
+
+#include <nvgpu/hw/gk20a/hw_flush_gk20a.h>
+
+#include "flush_gk20a.h"
+
+#ifdef CONFIG_NVGPU_COMPRESSION
+void gk20a_mm_cbc_clean(struct gk20a *g)
+{
+	struct mm_gk20a *mm = &g->mm;
+	u32 data;
+	struct nvgpu_timeout timeout;
+	u32 retries = 200;
+
+	nvgpu_log_fn(g, " ");
+
+	gk20a_busy_noresume(g);
+	if (nvgpu_is_powered_off(g)) {
+		goto hw_was_off;
+	}
+
+	if (g->ops.mm.get_flush_retries != NULL) {
+		retries = g->ops.mm.get_flush_retries(g, NVGPU_FLUSH_CBC_CLEAN);
+	}
+
+	nvgpu_assert(nvgpu_timeout_init(g, &timeout, retries,
+			NVGPU_TIMER_RETRY_TIMER) == 0);
+
+	nvgpu_mutex_acquire(&mm->l2_op_lock);
+
+	/* Flush all dirty lines from the CBC to L2 */
+	nvgpu_writel(g, flush_l2_clean_comptags_r(),
+		flush_l2_clean_comptags_pending_busy_f());
+
+	do {
+		data = nvgpu_readl(g, flush_l2_clean_comptags_r());
+
+		if (flush_l2_clean_comptags_outstanding_v(data) ==
+			flush_l2_clean_comptags_outstanding_true_v() ||
+		    flush_l2_clean_comptags_pending_v(data) ==
+			flush_l2_clean_comptags_pending_busy_v()) {
+			nvgpu_log_info(g, "l2_clean_comptags 0x%x", data);
+			nvgpu_udelay(5);
+		} else {
+			break;
+		}
+	} while (nvgpu_timeout_expired_msg(&timeout,
+				"l2_clean_comptags too many retries") == 0);
+
+	nvgpu_mutex_release(&mm->l2_op_lock);
+
+hw_was_off:
+	gk20a_idle_nosuspend(g);
+}
+#endif