Include nvgpu headers

These are needed to build on NVIDIA's Jetson boards for the time
being. Only a couple structs are required, so it should be fairly
easy to remove this dependency at some point in the future.

1 files changed, 95 insertions, 0 deletions

diff --git a/include/os/linux/debug_hal.c b/include/os/linux/debug_hal.c
new file mode 100644
index 0000000..031e335
--- /dev/null
+++ b/include/os/linux/debug_hal.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2017 NVIDIA Corporation.  All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include "debug_hal.h"
+#include "os_linux.h"
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+/* Format and print a single function pointer to the specified seq_file. */
+static void __hal_print_op(struct seq_file *s, void *op_ptr)
+{
+        seq_printf(s, "%pF\n", op_ptr);
+}
+
+/*
+ * Prints an array of function pointer addresses in op_ptrs to the
+ * specified seq_file
+ */
+static void __hal_print_ops(struct seq_file *s, void **op_ptrs, int num_ops)
+{
+        int i;
+
+        for (i = 0; i < num_ops; i++)
+                __hal_print_op(s, op_ptrs[i]);
+}
+
+/*
+ * Show file operation, which generates content of the file once. Prints a list
+ * of gpu operations as defined by gops and the corresponding function pointer
+ * destination addresses. Relies on no compiler reordering of struct fields and
+ * assumption that all members are function pointers.
+ */
+static int __hal_show(struct seq_file *s, void *unused)
+{
+        struct gpu_ops *gops = s->private;
+
+        __hal_print_ops(s, (void **)gops, sizeof(*gops) / sizeof(void *));
+
+        return 0;
+}
+
+static int __hal_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, __hal_show, inode->i_private);
+}
+
+static const struct file_operations __hal_fops = {
+        .open = __hal_open,
+        .read = seq_read,
+        .llseek = seq_lseek,
+        .release = single_release,
+};
+
+void nvgpu_hal_debugfs_fini(struct gk20a *g)
+{
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+        if (!(l->debugfs_hal == NULL))
+                debugfs_remove_recursive(l->debugfs_hal);
+}
+
+void nvgpu_hal_debugfs_init(struct gk20a *g)
+{
+        struct dentry *d;
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+        if (!l->debugfs)
+                return;
+        l->debugfs_hal = debugfs_create_dir("hal", l->debugfs);
+        if (IS_ERR_OR_NULL(l->debugfs_hal)) {
+                l->debugfs_hal = NULL;
+                return;
+        }
+
+        /* Pass along reference to the gpu_ops struct as private data */
+        d = debugfs_create_file("gops", S_IRUGO, l->debugfs_hal,
+                &g->ops, &__hal_fops);
+        if (!d) {
+                nvgpu_err(g, "%s: Failed to make debugfs node\n", __func__);
+                debugfs_remove_recursive(l->debugfs_hal);
+                return;
+        }
+}