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git://nv-tegra.nvidia.com/linux-nv-oot.git
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1a3e4521c8
Change-Id: I7ea45fb5aa393372299648e326e81ecf62913b40 Signed-off-by: Chris Dragan <kdragan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2955034 Reviewed-by: Lael Jones <lajones@nvidia.com> Reviewed-by: Sachin Nikam <snikam@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2014-2023, NVIDIA CORPORATION. All rights reserved. */
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#include "mods_internal.h"
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/miscdevice.h>
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#include <linux/device.h>
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#include <linux/uaccess.h>
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static struct dentry *mods_debugfs_dir;
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#if defined(MODS_HAS_TEGRA) && defined(CONFIG_TEGRA_KFUSE)
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#include <soc/tegra/kfuse.h>
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#endif
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#if defined(MODS_HAS_TEGRA) && defined(CONFIG_TEGRA_KFUSE)
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static int mods_kfuse_show(struct seq_file *s, void *unused)
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{
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unsigned int buf[KFUSE_DATA_SZ / 4];
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/* copy load kfuse into buffer - only needed for early Tegra parts */
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int ret = tegra_kfuse_read(buf, sizeof(buf));
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int i;
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if (ret)
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return ret;
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for (i = 0; i < KFUSE_DATA_SZ / 4; i += 4)
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seq_printf(s, "0x%08x 0x%08x 0x%08x 0x%08x\n",
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buf[i], buf[i+1], buf[i+2], buf[i+3]);
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return 0;
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}
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static int mods_kfuse_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mods_kfuse_show, inode->i_private);
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}
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static const struct file_operations mods_kfuse_fops = {
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.open = mods_kfuse_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#endif /* MODS_HAS_TEGRA */
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static int mods_debug_get(void *data, u64 *val)
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{
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*val = (u64)(mods_get_debug_level() & DEBUG_ALL);
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return 0;
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}
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static int mods_debug_set(void *data, u64 val)
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{
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mods_set_debug_level((int)val & DEBUG_ALL);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mods_debug_fops, mods_debug_get, mods_debug_set,
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"0x%08llx\n");
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static int mods_mi_get(void *data, u64 *val)
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{
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*val = (u64)mods_get_multi_instance();
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return 0;
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}
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static int mods_mi_set(void *data, u64 val)
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{
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mods_set_multi_instance((int)val);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mods_mi_fops, mods_mi_get, mods_mi_set, "%llu\n");
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static int mods_ffa_get(void *data, u64 *val)
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{
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#if defined(MODS_HAS_ARM_FFA)
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*val = 1ULL;
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#else
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*val = 0ULL;
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#endif
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mods_ffa_fops, mods_ffa_get, NULL, "%llu\n");
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void mods_remove_debugfs(void)
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{
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debugfs_remove_recursive(mods_debugfs_dir);
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mods_debugfs_dir = NULL;
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}
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int mods_create_debugfs(struct miscdevice *modsdev)
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{
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struct dentry *retval;
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int err = 0;
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mods_debugfs_dir = debugfs_create_dir(dev_name(modsdev->this_device),
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NULL);
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if (IS_ERR(mods_debugfs_dir)) {
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err = -EIO;
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goto remove_out;
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}
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retval = debugfs_create_file("debug", 0644,
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mods_debugfs_dir, NULL, &mods_debug_fops);
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if (IS_ERR(retval)) {
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err = -EIO;
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goto remove_out;
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}
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retval = debugfs_create_file("multi_instance", 0644,
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mods_debugfs_dir, NULL, &mods_mi_fops);
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if (IS_ERR(retval)) {
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err = -EIO;
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goto remove_out;
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}
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retval = debugfs_create_file("ffa", 0444,
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mods_debugfs_dir, NULL, &mods_ffa_fops);
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if (IS_ERR(retval)) {
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err = -EIO;
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goto remove_out;
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}
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#if defined(MODS_HAS_TEGRA) && defined(CONFIG_TEGRA_KFUSE)
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retval = debugfs_create_file("kfuse_data", 0444,
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mods_debugfs_dir, NULL, &mods_kfuse_fops);
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if (IS_ERR(retval)) {
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err = -EIO;
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goto remove_out;
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}
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#endif
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return 0;
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remove_out:
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dev_err(modsdev->this_device, "could not create debugfs\n");
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mods_remove_debugfs();
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return err;
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}
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