/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * 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 . rst
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
#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"
static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
struct kobject *kobj,
const 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,
const 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,
const 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);
static struct attribute *arcmsr_host_attrs[] = {
&dev_attr_host_driver_version.attr,
&dev_attr_host_driver_posted_cmd.attr,
&dev_attr_host_driver_reset.attr,
&dev_attr_host_driver_abort.attr,
&dev_attr_host_fw_model.attr,
&dev_attr_host_fw_version.attr,
&dev_attr_host_fw_request_len.attr,
&dev_attr_host_fw_numbers_queue.attr,
&dev_attr_host_fw_sdram_size.attr,
&dev_attr_host_fw_hd_channels.attr,
NULL,
};
static const struct attribute_group arcmsr_host_attr_group = {
.attrs = arcmsr_host_attrs,
};
const struct attribute_group *arcmsr_host_groups[] = {
&arcmsr_host_attr_group,
NULL
};
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