Open source GPL/LGPL release

drivers/gpu/nvgpu/os/linux/debug_gr.c

@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2017-2020 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 <nvgpu/gk20a.h>
+#include <nvgpu/gr/ctx.h>
+
+#include "common/gr/ctx_priv.h"
+#include "common/gr/gr_priv.h"
+
+#include "debug_gr.h"
+#include "os_linux.h"
+
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+
+static int gr_default_attrib_cb_size_show(struct seq_file *s, void *data)
+{
+	struct gk20a *g = s->private;
+
+	/* HAL might not be initialized yet */
+	if (g->ops.gr.init.get_attrib_cb_default_size == NULL)
+		return -EFAULT;
+
+	seq_printf(s, "%u\n", g->ops.gr.init.get_attrib_cb_default_size(g));
+
+	return 0;
+}
+
+static int gr_default_attrib_cb_size_open(struct inode *inode,
+	struct file *file)
+{
+	return single_open(file, gr_default_attrib_cb_size_show,
+		inode->i_private);
+}
+
+static const struct file_operations gr_default_attrib_cb_size_fops= {
+	.open		= gr_default_attrib_cb_size_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static ssize_t force_preemption_gfxp_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->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	if (g->gr->gr_ctx_desc->force_preemption_gfxp) {
+		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 force_preemption_gfxp_write(struct file *file,
+		const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	char buf[32];
+	int buf_size;
+	bool val;
+	struct gk20a *g = file->private_data;
+
+	if (g->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	buf_size = min(count, (sizeof(buf)-1));
+	if (copy_from_user(buf, user_buf, buf_size)) {
+		return -EFAULT;
+	}
+
+	if (strtobool(buf, &val) == 0) {
+		g->gr->gr_ctx_desc->force_preemption_gfxp = val;
+	}
+
+	return count;
+}
+
+static struct file_operations force_preemption_gfxp_fops = {
+	.open =		simple_open,
+	.read =		force_preemption_gfxp_read,
+	.write =	force_preemption_gfxp_write,
+};
+
+static ssize_t force_preemption_cilp_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->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	if (g->gr->gr_ctx_desc->force_preemption_cilp) {
+		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 force_preemption_cilp_write(struct file *file,
+		const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	char buf[32];
+	int buf_size;
+	bool val;
+	struct gk20a *g = file->private_data;
+
+	if (g->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	buf_size = min(count, (sizeof(buf)-1));
+	if (copy_from_user(buf, user_buf, buf_size)) {
+		return -EFAULT;
+	}
+
+	if (strtobool(buf, &val) == 0) {
+		g->gr->gr_ctx_desc->force_preemption_cilp = val;
+	}
+
+	return count;
+}
+
+static struct file_operations force_preemption_cilp_fops = {
+	.open =		simple_open,
+	.read =		force_preemption_cilp_read,
+	.write =	force_preemption_cilp_write,
+};
+
+static ssize_t dump_ctxsw_stats_on_channel_close_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->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	if (g->gr->gr_ctx_desc->dump_ctxsw_stats_on_channel_close) {
+		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 dump_ctxsw_stats_on_channel_close_write(struct file *file,
+		const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	char buf[32];
+	int buf_size;
+	bool val;
+	struct gk20a *g = file->private_data;
+
+	if (g->gr->gr_ctx_desc == NULL) {
+		return -EFAULT;
+	}
+
+	buf_size = min(count, (sizeof(buf)-1));
+	if (copy_from_user(buf, user_buf, buf_size)) {
+		return -EFAULT;
+	}
+
+	if (strtobool(buf, &val) == 0) {
+		g->gr->gr_ctx_desc->dump_ctxsw_stats_on_channel_close = val;
+	}
+
+	return count;
+}
+
+static struct file_operations dump_ctxsw_stats_on_channel_close_fops = {
+	.open =		simple_open,
+	.read =		dump_ctxsw_stats_on_channel_close_read,
+	.write =	dump_ctxsw_stats_on_channel_close_write,
+};
+
+int gr_gk20a_debugfs_init(struct gk20a *g)
+{
+	struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+	struct dentry *d;
+
+	d = debugfs_create_file(
+		"gr_default_attrib_cb_size", S_IRUGO, l->debugfs, g,
+				&gr_default_attrib_cb_size_fops);
+	if (!d)
+		return -ENOMEM;
+
+	d = debugfs_create_file(
+		"force_preemption_gfxp", S_IRUGO|S_IWUSR, l->debugfs, g,
+				&force_preemption_gfxp_fops);
+	if (!d)
+		return -ENOMEM;
+
+	d = debugfs_create_file(
+		"force_preemption_cilp", S_IRUGO|S_IWUSR, l->debugfs, g,
+				&force_preemption_cilp_fops);
+	if (!d)
+		return -ENOMEM;
+
+	if (!g->is_virtual) {
+		d = debugfs_create_file(
+			"dump_ctxsw_stats_on_channel_close", S_IRUGO|S_IWUSR,
+				l->debugfs, g,
+				&dump_ctxsw_stats_on_channel_close_fops);
+		if (!d)
+			return -ENOMEM;
+	}
+
+	return 0;
+}
+