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linux/drivers/scsi/arcmsr/arcmsr_attr.c
Bhumika Goyal 5f3342d757 arcmsr: add const to bin_attribute structures 
Add const to bin_attribute structures as they are only passed to the
functions system_{remove/create}_bin_file. The arguments passed are of
type const, so declare the structures to be const.

Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-08-10 19:40:50 -04:00

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/*
*******************************************************************************
** O.S : Linux
** FILE NAME : arcmsr_attr.c
** BY : Nick Cheng
** Description: attributes exported to sysfs and device host
*******************************************************************************
** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
**
** Web site: www.areca.com.tw
** E-mail: support@areca.com.tw
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License version 2 as
** published by the Free Software Foundation.
** 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.
*******************************************************************************
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
*******************************************************************************
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/circ_buf.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include "arcmsr.h"
struct device_attribute *arcmsr_host_attrs[];
static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin,
char *buf, loff_t off,
size_t count)
{
struct device *dev = container_of(kobj,struct device,kobj);
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
uint8_t *ptmpQbuffer;
int32_t allxfer_len = 0;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
/* do message unit read. */
ptmpQbuffer = (uint8_t *)buf;
spin_lock_irqsave(&acb->rqbuffer_lock, flags);
if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
unsigned int tail = acb->rqbuf_getIndex;
unsigned int head = acb->rqbuf_putIndex;
unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
allxfer_len = ARCMSR_API_DATA_BUFLEN;
if (allxfer_len <= cnt_to_end)
memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
else {
memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
}
acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
}
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
struct QBUFFER __iomem *prbuffer;
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
prbuffer = arcmsr_get_iop_rqbuffer(acb);
if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
}
spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
return allxfer_len;
}
static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin,
char *buf, loff_t off,
size_t count)
{
struct device *dev = container_of(kobj,struct device,kobj);
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
int32_t user_len, cnt2end;
uint8_t *pQbuffer, *ptmpuserbuffer;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (count > ARCMSR_API_DATA_BUFLEN)
return -EINVAL;
/* do message unit write. */
ptmpuserbuffer = (uint8_t *)buf;
user_len = (int32_t)count;
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
if (acb->wqbuf_putIndex != acb->wqbuf_getIndex) {
arcmsr_write_ioctldata2iop(acb);
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
return 0; /*need retry*/
} else {
pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
cnt2end = ARCMSR_MAX_QBUFFER - acb->wqbuf_putIndex;
if (user_len > cnt2end) {
memcpy(pQbuffer, ptmpuserbuffer, cnt2end);
ptmpuserbuffer += cnt2end;
user_len -= cnt2end;
acb->wqbuf_putIndex = 0;
pQbuffer = acb->wqbuffer;
}
memcpy(pQbuffer, ptmpuserbuffer, user_len);
acb->wqbuf_putIndex += user_len;
acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
acb->acb_flags &=
~ACB_F_MESSAGE_WQBUFFER_CLEARED;
arcmsr_write_ioctldata2iop(acb);
}
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
return count;
}
}
static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin,
char *buf, loff_t off,
size_t count)
{
struct device *dev = container_of(kobj,struct device,kobj);
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
uint8_t *pQbuffer;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
arcmsr_clear_iop2drv_rqueue_buffer(acb);
acb->acb_flags |=
(ACB_F_MESSAGE_WQBUFFER_CLEARED
| ACB_F_MESSAGE_RQBUFFER_CLEARED
| ACB_F_MESSAGE_WQBUFFER_READED);
spin_lock_irqsave(&acb->rqbuffer_lock, flags);
acb->rqbuf_getIndex = 0;
acb->rqbuf_putIndex = 0;
spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
acb->wqbuf_getIndex = 0;
acb->wqbuf_putIndex = 0;
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
pQbuffer = acb->rqbuffer;
memset(pQbuffer, 0, sizeof (struct QBUFFER));
pQbuffer = acb->wqbuffer;
memset(pQbuffer, 0, sizeof (struct QBUFFER));
return 1;
}
static const struct bin_attribute arcmsr_sysfs_message_read_attr = {
.attr = {
.name = "mu_read",
.mode = S_IRUSR ,
},
.size = ARCMSR_API_DATA_BUFLEN,
.read = arcmsr_sysfs_iop_message_read,
};
static const struct bin_attribute arcmsr_sysfs_message_write_attr = {
.attr = {
.name = "mu_write",
.mode = S_IWUSR,
},
.size = ARCMSR_API_DATA_BUFLEN,
.write = arcmsr_sysfs_iop_message_write,
};
static const struct bin_attribute arcmsr_sysfs_message_clear_attr = {
.attr = {
.name = "mu_clear",
.mode = S_IWUSR,
},
.size = 1,
.write = arcmsr_sysfs_iop_message_clear,
};
int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
{
struct Scsi_Host *host = acb->host;
int error;
error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
if (error) {
printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
goto error_bin_file_message_read;
}
error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
if (error) {
printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
goto error_bin_file_message_write;
}
error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
if (error) {
printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
goto error_bin_file_message_clear;
}
return 0;
error_bin_file_message_clear:
sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
error_bin_file_message_write:
sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
error_bin_file_message_read:
return error;
}
void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
{
struct Scsi_Host *host = acb->host;
sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
}
static ssize_t
arcmsr_attr_host_driver_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE,
"%s\n",
ARCMSR_DRIVER_VERSION);
}
static ssize_t
arcmsr_attr_host_driver_posted_cmd(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
atomic_read(&acb->ccboutstandingcount));
}
static ssize_t
arcmsr_attr_host_driver_reset(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->num_resets);
}
static ssize_t
arcmsr_attr_host_driver_abort(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->num_aborts);
}
static ssize_t
arcmsr_attr_host_fw_model(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%s\n",
acb->firm_model);
}
static ssize_t
arcmsr_attr_host_fw_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%s\n",
acb->firm_version);
}
static ssize_t
arcmsr_attr_host_fw_request_len(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->firm_request_len);
}
static ssize_t
arcmsr_attr_host_fw_numbers_queue(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->firm_numbers_queue);
}
static ssize_t
arcmsr_attr_host_fw_sdram_size(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->firm_sdram_size);
}
static ssize_t
arcmsr_attr_host_fw_hd_channels(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
return snprintf(buf, PAGE_SIZE,
"%4d\n",
acb->firm_hd_channels);
}
static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
struct device_attribute *arcmsr_host_attrs[] = {
&dev_attr_host_driver_version,
&dev_attr_host_driver_posted_cmd,
&dev_attr_host_driver_reset,
&dev_attr_host_driver_abort,
&dev_attr_host_fw_model,
&dev_attr_host_fw_version,
&dev_attr_host_fw_request_len,
&dev_attr_host_fw_numbers_queue,
&dev_attr_host_fw_sdram_size,
&dev_attr_host_fw_hd_channels,
NULL,
};
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