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    Subject[PATCH v2 15/17] powerpc: crypto: debugfs routines and docs for the nx device driver
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    Date
    These routines add debugfs files supporting the Power7+ in-Nest encryption
    accelerator driver.

    Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
    ---
    Documentation/ABI/testing/debugfs-pfo-nx-crypto | 45 ++++++++++
    drivers/crypto/nx/nx_debugfs.c | 103 +++++++++++++++++++++++
    2 files changed, 148 insertions(+), 0 deletions(-)
    create mode 100644 Documentation/ABI/testing/debugfs-pfo-nx-crypto
    create mode 100644 drivers/crypto/nx/nx_debugfs.c

    diff --git a/Documentation/ABI/testing/debugfs-pfo-nx-crypto b/Documentation/ABI/testing/debugfs-pfo-nx-crypto
    new file mode 100644
    index 0000000..685d5a4
    --- /dev/null
    +++ b/Documentation/ABI/testing/debugfs-pfo-nx-crypto
    @@ -0,0 +1,45 @@
    +What: /sys/kernel/debug/nx-crypto/*
    +Date: March 2012
    +KernelVersion: 3.4
    +Contact: Kent Yoder <key@linux.vnet.ibm.com>
    +Description:
    +
    + These debugfs interfaces are built by the nx-crypto driver, built in
    +arch/powerpc/crypto/nx.
    +
    +Error Detection
    +===============
    +
    +errors:
    +- A u32 providing a total count of errors since the driver was loaded. The
    +only errors counted here are those returned from the hcall, H_COP_OP.
    +
    +last_error:
    +- The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
    +recorded here (the hcall will retry until -EBUSY goes away).
    +
    +last_error_pid:
    +- The process ID of the process who received the most recent error from the
    +hcall.
    +
    +Device Use
    +==========
    +
    +aes_bytes:
    +- The total number of bytes encrypted using AES in any of the driver's
    +supported modes.
    +
    +aes_ops:
    +- The total number of AES operations submitted to the hardware.
    +
    +sha256_bytes:
    +- The total number of bytes hashed by the hardware using SHA-256.
    +
    +sha256_ops:
    +- The total number of SHA-256 operations submitted to the hardware.
    +
    +sha512_bytes:
    +- The total number of bytes hashed by the hardware using SHA-512.
    +
    +sha512_ops:
    +- The total number of SHA-512 operations submitted to the hardware.
    diff --git a/drivers/crypto/nx/nx_debugfs.c b/drivers/crypto/nx/nx_debugfs.c
    new file mode 100644
    index 0000000..7ab2e8d
    --- /dev/null
    +++ b/drivers/crypto/nx/nx_debugfs.c
    @@ -0,0 +1,103 @@
    +/**
    + * debugfs routines supporting the Power 7+ Nest Accelerators driver
    + *
    + * Copyright (C) 2011-2012 International Business Machines Inc.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; version 2 only.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    + *
    + * Author: Kent Yoder <yoder1@us.ibm.com>
    + */
    +
    +#include <linux/device.h>
    +#include <linux/kobject.h>
    +#include <linux/string.h>
    +#include <linux/debugfs.h>
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/crypto.h>
    +#include <crypto/hash.h>
    +#include <asm/vio.h>
    +
    +#include "nx_csbcpb.h"
    +#include "nx.h"
    +
    +#ifdef CONFIG_DEBUG_FS
    +
    +/*
    + * debugfs
    + *
    + * For documentation on these attributes, please see:
    + *
    + * Documentation/ABI/testing/debugfs-pfo-nx-crypto
    + */
    +
    +int nx_debugfs_init(struct nx_crypto_driver *drv)
    +{
    + struct nx_debugfs *dfs = &drv->dfs;
    +
    + dfs->dfs_root = debugfs_create_dir(NX_NAME, NULL);
    +
    + dfs->dfs_aes_ops =
    + debugfs_create_u32("aes_ops",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root, (u32 *)&drv->stats.aes_ops);
    + dfs->dfs_sha256_ops =
    + debugfs_create_u32("sha256_ops",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u32 *)&drv->stats.sha256_ops);
    + dfs->dfs_sha512_ops =
    + debugfs_create_u32("sha512_ops",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u32 *)&drv->stats.sha512_ops);
    + dfs->dfs_aes_bytes =
    + debugfs_create_u64("aes_bytes",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u64 *)&drv->stats.aes_bytes);
    + dfs->dfs_sha256_bytes =
    + debugfs_create_u64("sha256_bytes",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u64 *)&drv->stats.sha256_bytes);
    + dfs->dfs_sha512_bytes =
    + debugfs_create_u64("sha512_bytes",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u64 *)&drv->stats.sha512_bytes);
    + dfs->dfs_errors =
    + debugfs_create_u32("errors",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root, (u32 *)&drv->stats.errors);
    + dfs->dfs_last_error =
    + debugfs_create_u32("last_error",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u32 *)&drv->stats.last_error);
    + dfs->dfs_last_error_pid =
    + debugfs_create_u32("last_error_pid",
    + S_IRUSR | S_IRGRP | S_IROTH,
    + dfs->dfs_root,
    + (u32 *)&drv->stats.last_error_pid);
    + return 0;
    +}
    +
    +void
    +nx_debugfs_fini(struct nx_crypto_driver *drv)
    +{
    + debugfs_remove_recursive(drv->dfs.dfs_root);
    +}
    +
    +#endif
    --
    1.7.1



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