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/*
* 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;
}
}
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