1 files changed, 93 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/debug_ltc.c b/drivers/gpu/nvgpu/os/linux/debug_ltc.c
new file mode 100644
index 00000000..88fb45f4
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/debug_ltc.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2018 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_ltc.h"
+#include "os_linux.h"
+#include "gk20a/gk20a.h"
+
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+
+static ssize_t ltc_intr_illegal_compstat_read(struct file *file,
+                        char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[3];
+        struct gk20a *g = file->private_data;
+
+        if (g->ltc_intr_en_illegal_compstat)
+                buf[0] = 'Y';
+        else
+                buf[0] = 'N';
+        buf[1] = '\n';
+        buf[2] = 0x00;
+
+        return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t ltc_intr_illegal_compstat_write(struct file *file,
+                        const char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[3];
+        int buf_size;
+        bool intr_illegal_compstat_enabled;
+        struct gk20a *g = file->private_data;
+        int err;
+
+        if (!g->ops.ltc.intr_en_illegal_compstat)
+                return -EINVAL;
+
+        buf_size = min(count, (sizeof(buf)-1));
+        if (copy_from_user(buf, user_buf, buf_size))
+                return -EFAULT;
+
+        err = gk20a_busy(g);
+        if (err)
+                return err;
+
+        if (strtobool(buf, &intr_illegal_compstat_enabled) == 0) {
+                g->ops.ltc.intr_en_illegal_compstat(g,
+                                intr_illegal_compstat_enabled);
+                g->ltc_intr_en_illegal_compstat = intr_illegal_compstat_enabled;
+        }
+
+        gk20a_idle(g);
+
+        return buf_size;
+}
+
+static const struct file_operations ltc_intr_illegal_compstat_fops = {
+        .open = simple_open,
+        .read = ltc_intr_illegal_compstat_read,
+        .write = ltc_intr_illegal_compstat_write,
+};
+
+int nvgpu_ltc_debugfs_init(struct gk20a *g)
+{
+        struct dentry *d;
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+        struct dentry *gpu_root = l->debugfs;
+
+        l->debugfs_ltc = debugfs_create_dir("ltc", gpu_root);
+        if (IS_ERR_OR_NULL(l->debugfs_ltc))
+                return -ENODEV;
+
+        /* Debug fs node to enable/disable illegal_compstat */
+        d = debugfs_create_file("intr_illegal_compstat_enable", 0600,
+                            l->debugfs_ltc, g,
+                            &ltc_intr_illegal_compstat_fops);
+        if (!d)
+                return -ENOMEM;
+
+        return 0;
+}