powerpc/crypto: debugfs routines and docs for the nx device driver
These routines add debugfs files supporting the Power7+ in-Nest encryption accelerator driver. Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kent Yoder
Benjamin Herrenschmidt
parent
fc482a86c3
commit
175e0e2346
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What: /sys/kernel/debug/nx-crypto/*
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Date: March 2012
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KernelVersion: 3.4
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Contact: Kent Yoder <key@linux.vnet.ibm.com>
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Description:
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These debugfs interfaces are built by the nx-crypto driver, built in
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arch/powerpc/crypto/nx.
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Error Detection
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===============
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errors:
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- A u32 providing a total count of errors since the driver was loaded. The
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only errors counted here are those returned from the hcall, H_COP_OP.
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last_error:
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- The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
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recorded here (the hcall will retry until -EBUSY goes away).
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last_error_pid:
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- The process ID of the process who received the most recent error from the
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hcall.
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Device Use
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==========
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aes_bytes:
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- The total number of bytes encrypted using AES in any of the driver's
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supported modes.
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aes_ops:
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- The total number of AES operations submitted to the hardware.
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sha256_bytes:
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- The total number of bytes hashed by the hardware using SHA-256.
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sha256_ops:
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- The total number of SHA-256 operations submitted to the hardware.
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sha512_bytes:
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- The total number of bytes hashed by the hardware using SHA-512.
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sha512_ops:
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- The total number of SHA-512 operations submitted to the hardware.
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@ -0,0 +1,103 @@
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/**
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* debugfs routines supporting the Power 7+ Nest Accelerators driver
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*
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* Copyright (C) 2011-2012 International Business Machines Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 only.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Author: Kent Yoder <yoder1@us.ibm.com>
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*/
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#include <linux/device.h>
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#include <linux/kobject.h>
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#include <linux/string.h>
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/crypto.h>
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#include <crypto/hash.h>
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#include <asm/vio.h>
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#include "nx_csbcpb.h"
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#include "nx.h"
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#ifdef CONFIG_DEBUG_FS
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/*
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* debugfs
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*
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* For documentation on these attributes, please see:
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*
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* Documentation/ABI/testing/debugfs-pfo-nx-crypto
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*/
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int nx_debugfs_init(struct nx_crypto_driver *drv)
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{
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struct nx_debugfs *dfs = &drv->dfs;
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dfs->dfs_root = debugfs_create_dir(NX_NAME, NULL);
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dfs->dfs_aes_ops =
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debugfs_create_u32("aes_ops",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root, (u32 *)&drv->stats.aes_ops);
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dfs->dfs_sha256_ops =
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debugfs_create_u32("sha256_ops",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u32 *)&drv->stats.sha256_ops);
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dfs->dfs_sha512_ops =
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debugfs_create_u32("sha512_ops",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u32 *)&drv->stats.sha512_ops);
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dfs->dfs_aes_bytes =
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debugfs_create_u64("aes_bytes",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u64 *)&drv->stats.aes_bytes);
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dfs->dfs_sha256_bytes =
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debugfs_create_u64("sha256_bytes",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u64 *)&drv->stats.sha256_bytes);
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dfs->dfs_sha512_bytes =
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debugfs_create_u64("sha512_bytes",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u64 *)&drv->stats.sha512_bytes);
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dfs->dfs_errors =
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debugfs_create_u32("errors",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root, (u32 *)&drv->stats.errors);
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dfs->dfs_last_error =
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debugfs_create_u32("last_error",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u32 *)&drv->stats.last_error);
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dfs->dfs_last_error_pid =
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debugfs_create_u32("last_error_pid",
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S_IRUSR | S_IRGRP | S_IROTH,
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dfs->dfs_root,
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(u32 *)&drv->stats.last_error_pid);
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return 0;
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}
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void
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nx_debugfs_fini(struct nx_crypto_driver *drv)
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{
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debugfs_remove_recursive(drv->dfs.dfs_root);
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}
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#endif
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