Open source GPL/LGPL release

drivers/gpu/nvgpu/common/cbc/cbc.c

@@ -0,0 +1,122 @@
+/*
+ * CBC
+ *
+ * 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/gk20a.h>
+#include <nvgpu/cbc.h>
+#include <nvgpu/dma.h>
+#include <nvgpu/log.h>
+#include <nvgpu/nvgpu_mem.h>
+#include <nvgpu/comptags.h>
+
+void nvgpu_cbc_remove_support(struct gk20a *g)
+{
+	struct nvgpu_cbc *cbc = g->cbc;
+
+	nvgpu_log_fn(g, " ");
+
+	if (cbc == NULL) {
+		return;
+	}
+
+	if (nvgpu_mem_is_valid(&cbc->compbit_store.mem)) {
+		nvgpu_dma_free(g, &cbc->compbit_store.mem);
+		(void) memset(&cbc->compbit_store, 0,
+			sizeof(struct compbit_store_desc));
+	}
+	gk20a_comptag_allocator_destroy(g, &cbc->comp_tags);
+
+	nvgpu_kfree(g, cbc);
+	g->cbc = NULL;
+}
+
+/*
+ * This function is triggered during finalize_poweron multiple times.
+ * This function should not return if cbc is not NULL.
+ * cbc.init(), which re-writes HW registers that are reset during suspend,
+ * should be allowed to execute each time.
+ */
+int nvgpu_cbc_init_support(struct gk20a *g)
+{
+	int err = 0;
+	struct nvgpu_cbc *cbc = g->cbc;
+
+	nvgpu_log_fn(g, " ");
+
+	if (cbc == NULL) {
+		cbc = nvgpu_kzalloc(g, sizeof(*cbc));
+		if (cbc == NULL) {
+			return -ENOMEM;
+		}
+		g->cbc = cbc;
+
+		if (g->ops.cbc.alloc_comptags != NULL) {
+			err = g->ops.cbc.alloc_comptags(g, g->cbc);
+			if (err != 0) {
+				nvgpu_err(g, "Failed to allocate comptags");
+				nvgpu_kfree(g, cbc);
+				g->cbc = NULL;
+				return err;
+			}
+		}
+	}
+
+	if (g->ops.cbc.init != NULL) {
+		g->ops.cbc.init(g, g->cbc);
+	}
+
+	return err;
+}
+
+int nvgpu_cbc_alloc(struct gk20a *g, size_t compbit_backing_size,
+			bool vidmem_alloc)
+{
+	struct nvgpu_cbc *cbc = g->cbc;
+
+	if (nvgpu_mem_is_valid(&cbc->compbit_store.mem) != 0) {
+		return 0;
+	}
+
+#ifdef CONFIG_NVGPU_DGPU
+	if (vidmem_alloc == true) {
+		/*
+		 * Backing store MUST be physically contiguous and allocated in
+		 * one chunk
+		 * Vidmem allocation API does not support FORCE_CONTIGUOUS like
+		 * flag to allocate contiguous memory
+		 * But this allocation will happen in vidmem bootstrap allocator
+		 * which always allocates contiguous memory
+		 */
+		return nvgpu_dma_alloc_vid(g,
+					 compbit_backing_size,
+					 &cbc->compbit_store.mem);
+	} else
+#endif
+	{
+		return nvgpu_dma_alloc_flags_sys(g,
+					 NVGPU_DMA_PHYSICALLY_ADDRESSED,
+					 compbit_backing_size,
+					 &cbc->compbit_store.mem);
+	}
+}