Open source GPL/LGPL release

drivers/gpu/nvgpu/gk20a/gk20a_allocator.c

@@ -0,0 +1,163 @@
+/*
+ * gk20a allocator
+ *
+ * Copyright (c) 2011-2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include "mm_gk20a.h"
+#include "platform_gk20a.h"
+#include "gk20a_allocator.h"
+
+u32 gk20a_alloc_tracing_on;
+
+static struct dentry *gk20a_alloc_debugfs_root;
+
+u64 gk20a_alloc_length(struct gk20a_allocator *a)
+{
+	return a->ops->length(a);
+}
+
+u64 gk20a_alloc_base(struct gk20a_allocator *a)
+{
+	return a->ops->base(a);
+}
+
+u64 gk20a_alloc_initialized(struct gk20a_allocator *a)
+{
+	if (!a->ops)
+		return 0;
+
+	return a->ops->inited(a);
+}
+
+u64 gk20a_alloc_end(struct gk20a_allocator *a)
+{
+	return a->ops->end(a);
+}
+
+u64 gk20a_alloc(struct gk20a_allocator *a, u64 len)
+{
+	return a->ops->alloc(a, len);
+}
+
+void gk20a_free(struct gk20a_allocator *a, u64 addr)
+{
+	a->ops->free(a, addr);
+}
+
+u64 gk20a_alloc_fixed(struct gk20a_allocator *a, u64 base, u64 len)
+{
+	return a->ops->alloc_fixed(a, base, len);
+}
+
+void gk20a_free_fixed(struct gk20a_allocator *a, u64 base, u64 len)
+{
+	/*
+	 * If this operation is not defined for the allocator then just do
+	 * nothing. The alternative would be to fall back on the regular
+	 * free but that may be harmful in unexpected ways.
+	 */
+	if (a->ops->free_fixed)
+		a->ops->free_fixed(a, base, len);
+}
+
+void gk20a_alloc_destroy(struct gk20a_allocator *a)
+{
+	a->ops->fini(a);
+	memset(a, 0, sizeof(*a));
+}
+
+/*
+ * Handle the common init stuff for a gk20a_allocator.
+ */
+int __gk20a_alloc_common_init(struct gk20a_allocator *a,
+			      const char *name, void *priv, bool dbg,
+			      const struct gk20a_allocator_ops *ops)
+{
+	if (!ops)
+		return -EINVAL;
+
+	a->ops = ops;
+	a->priv = priv;
+	a->debug = dbg;
+
+	mutex_init(&a->lock);
+
+	strlcpy(a->name, name, sizeof(a->name));
+
+	return 0;
+}
+
+void gk20a_alloc_print_stats(struct gk20a_allocator *__a,
+			     struct seq_file *s, int lock)
+{
+	__a->ops->print_stats(__a, s, lock);
+}
+
+static int __alloc_show(struct seq_file *s, void *unused)
+{
+	struct gk20a_allocator *a = s->private;
+
+	gk20a_alloc_print_stats(a, s, 1);
+
+	return 0;
+}
+
+static int __alloc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, __alloc_show, inode->i_private);
+}
+
+static const struct file_operations __alloc_fops = {
+	.open = __alloc_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+void gk20a_init_alloc_debug(struct gk20a_allocator *a)
+{
+	if (!gk20a_alloc_debugfs_root)
+		return;
+
+	a->debugfs_entry = debugfs_create_file(a->name, S_IRUGO,
+					       gk20a_alloc_debugfs_root,
+					       a, &__alloc_fops);
+}
+
+void gk20a_fini_alloc_debug(struct gk20a_allocator *a)
+{
+	if (!gk20a_alloc_debugfs_root)
+		return;
+
+	if (!IS_ERR_OR_NULL(a->debugfs_entry))
+		debugfs_remove(a->debugfs_entry);
+}
+
+void gk20a_alloc_debugfs_init(struct platform_device *pdev)
+{
+	struct gk20a_platform *platform = platform_get_drvdata(pdev);
+	struct dentry *gpu_root = platform->debugfs;
+
+	gk20a_alloc_debugfs_root = debugfs_create_dir("allocators", gpu_root);
+	if (IS_ERR_OR_NULL(gk20a_alloc_debugfs_root))
+		return;
+
+	debugfs_create_u32("tracing", 0664, gk20a_alloc_debugfs_root,
+			   &gk20a_alloc_tracing_on);
+}