[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / arcmsr / arcmsr_attr.c

/*
*******************************************************************************
**        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 <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 *pQbuffer,*ptmpQbuffer;
	int32_t allxfer_len = 0;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	/* do message unit read. */
	ptmpQbuffer = (uint8_t *)buf;
	while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
		&& (allxfer_len < 1031)) {
		pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
		memcpy(ptmpQbuffer, pQbuffer, 1);
		acb->rqbuf_firstindex++;
		acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
		ptmpQbuffer++;
		allxfer_len++;
	}
	if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
		struct QBUFFER __iomem *prbuffer;
		uint8_t __iomem *iop_data;
		int32_t iop_len;

		acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
		prbuffer = arcmsr_get_iop_rqbuffer(acb);
		iop_data = prbuffer->data;
		iop_len = readl(&prbuffer->data_len);
		while (iop_len > 0) {
			acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
			acb->rqbuf_lastindex++;
			acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
			iop_data++;
			iop_len--;
		}
		arcmsr_iop_message_read(acb);
	}
	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 my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
	uint8_t *pQbuffer, *ptmpuserbuffer;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;
	if (count > 1032)
		return -EINVAL;
	/* do message unit write. */
	ptmpuserbuffer = (uint8_t *)buf;
	user_len = (int32_t)count;
	wqbuf_lastindex = acb->wqbuf_lastindex;
	wqbuf_firstindex = acb->wqbuf_firstindex;
	if (wqbuf_lastindex != wqbuf_firstindex) {
		arcmsr_post_ioctldata2iop(acb);
		return 0;	/*need retry*/
	} else {
		my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
				&(ARCMSR_MAX_QBUFFER - 1);
		if (my_empty_len >= user_len) {
			while (user_len > 0) {
				pQbuffer =
				&acb->wqbuffer[acb->wqbuf_lastindex];
				memcpy(pQbuffer, ptmpuserbuffer, 1);
				acb->wqbuf_lastindex++;
				acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
				ptmpuserbuffer++;
				user_len--;
			}
			if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
				acb->acb_flags &=
					~ACB_F_MESSAGE_WQBUFFER_CLEARED;
				arcmsr_post_ioctldata2iop(acb);
			}
			return count;
		} else {
			return 0;	/*need retry*/
		}
	}
}

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;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
		acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
		arcmsr_iop_message_read(acb);
	}
	acb->acb_flags |=
		(ACB_F_MESSAGE_WQBUFFER_CLEARED
		| ACB_F_MESSAGE_RQBUFFER_CLEARED
		| ACB_F_MESSAGE_WQBUFFER_READED);
	acb->rqbuf_firstindex = 0;
	acb->rqbuf_lastindex = 0;
	acb->wqbuf_firstindex = 0;
	acb->wqbuf_lastindex = 0;
	pQbuffer = acb->rqbuffer;
	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	pQbuffer = acb->wqbuffer;
	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	return 1;
}

static struct bin_attribute arcmsr_sysfs_message_read_attr = {
	.attr = {
		.name = "mu_read",
		.mode = S_IRUSR ,
	},
	.size = 1032,
	.read = arcmsr_sysfs_iop_message_read,
};

static struct bin_attribute arcmsr_sysfs_message_write_attr = {
	.attr = {
		.name = "mu_write",
		.mode = S_IWUSR,
	},
	.size = 1032,
	.write = arcmsr_sysfs_iop_message_write,
};

static 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,
};
Commit	Line	Data
1c57e86d EC	1	/*
	2	*******************************************************************************
	3	** O.S : Linux
	4	** FILE NAME : arcmsr_attr.c
97b99127	5	** BY : Nick Cheng
1c57e86d EC	6	** Description: attributes exported to sysfs and device host
	7	*******************************************************************************
	8	** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
	9	**
	10	** Web site: www.areca.com.tw
1a4f550a	11	** E-mail: support@areca.com.tw
1c57e86d EC	12	**
	13	** This program is free software; you can redistribute it and/or modify
	14	** it under the terms of the GNU General Public License version 2 as
	15	** published by the Free Software Foundation.
	16	** This program is distributed in the hope that it will be useful,
	17	** but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	** GNU General Public License for more details.
	20	*******************************************************************************
	21	** Redistribution and use in source and binary forms, with or without
	22	** modification, are permitted provided that the following conditions
	23	** are met:
	24	** 1. Redistributions of source code must retain the above copyright
	25	** notice, this list of conditions and the following disclaimer.
	26	** 2. Redistributions in binary form must reproduce the above copyright
	27	** notice, this list of conditions and the following disclaimer in the
	28	** documentation and/or other materials provided with the distribution.
	29	** 3. The name of the author may not be used to endorse or promote products
	30	** derived from this software without specific prior written permission.
	31	**
	32	** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	33	** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	34	** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	35	** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	36	** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
	37	** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	38	** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
	39	** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	40	** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
	41	** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	42	*******************************************************************************
	43	** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
	44	** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
	45	*******************************************************************************
	46	*/
	47	#include <linux/module.h>
	48	#include <linux/kernel.h>
	49	#include <linux/init.h>
	50	#include <linux/errno.h>
	51	#include <linux/delay.h>
1a4f550a	52	#include <linux/pci.h>
1c57e86d EC	53
	54	#include <scsi/scsi_cmnd.h>
	55	#include <scsi/scsi_device.h>
	56	#include <scsi/scsi_host.h>
	57	#include <scsi/scsi_transport.h>
	58	#include "arcmsr.h"
	59
ee959b00	60	struct device_attribute *arcmsr_host_attrs[];
1c57e86d	61
2c3c8bea CW	62	static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
2c3c8bea CW	63	struct kobject *kobj,
685b9e02 JB	64	struct bin_attribute *bin,
	65	char *buf, loff_t off,
	66	size_t count)
1c57e86d	67	{
ee959b00 TJ	68	struct device *dev = container_of(kobj,struct device,kobj);
ee959b00 TJ	69	struct Scsi_Host *host = class_to_shost(dev);
1c57e86d	70	struct AdapterControlBlock acb = (struct AdapterControlBlock ) host->hostdata;
1c57e86d EC	71	uint8_t pQbuffer,ptmpQbuffer;
	72	int32_t allxfer_len = 0;
	73
	74	if (!capable(CAP_SYS_ADMIN))
	75	return -EACCES;
	76
	77	/* do message unit read. */
	78	ptmpQbuffer = (uint8_t *)buf;
	79	while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
	80	&& (allxfer_len < 1031)) {
	81	pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
	82	memcpy(ptmpQbuffer, pQbuffer, 1);
	83	acb->rqbuf_firstindex++;
	84	acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
	85	ptmpQbuffer++;
	86	allxfer_len++;
	87	}
	88	if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
80da1adb AV	89	struct QBUFFER __iomem *prbuffer;
80da1adb AV	90	uint8_t __iomem *iop_data;
1c57e86d EC	91	int32_t iop_len;
	92
	93	acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1a4f550a	94	prbuffer = arcmsr_get_iop_rqbuffer(acb);
80da1adb	95	iop_data = prbuffer->data;
1c57e86d EC	96	iop_len = readl(&prbuffer->data_len);
	97	while (iop_len > 0) {
	98	acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
	99	acb->rqbuf_lastindex++;
	100	acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
	101	iop_data++;
	102	iop_len--;
	103	}
1a4f550a	104	arcmsr_iop_message_read(acb);
1c57e86d EC	105	}
	106	return (allxfer_len);
	107	}
	108
2c3c8bea CW	109	static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
2c3c8bea CW	110	struct kobject *kobj,
685b9e02 JB	111	struct bin_attribute *bin,
	112	char *buf, loff_t off,
	113	size_t count)
1c57e86d	114	{
ee959b00 TJ	115	struct device *dev = container_of(kobj,struct device,kobj);
ee959b00 TJ	116	struct Scsi_Host *host = class_to_shost(dev);
1c57e86d EC	117	struct AdapterControlBlock acb = (struct AdapterControlBlock ) host->hostdata;
	118	int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
	119	uint8_t pQbuffer, ptmpuserbuffer;
	120
	121	if (!capable(CAP_SYS_ADMIN))
	122	return -EACCES;
	123	if (count > 1032)
	124	return -EINVAL;
	125	/* do message unit write. */
	126	ptmpuserbuffer = (uint8_t *)buf;
	127	user_len = (int32_t)count;
	128	wqbuf_lastindex = acb->wqbuf_lastindex;
	129	wqbuf_firstindex = acb->wqbuf_firstindex;
	130	if (wqbuf_lastindex != wqbuf_firstindex) {
1a4f550a	131	arcmsr_post_ioctldata2iop(acb);
1c57e86d EC	132	return 0; /need retry/
	133	} else {
	134	my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
	135	&(ARCMSR_MAX_QBUFFER - 1);
	136	if (my_empty_len >= user_len) {
	137	while (user_len > 0) {
	138	pQbuffer =
	139	&acb->wqbuffer[acb->wqbuf_lastindex];
	140	memcpy(pQbuffer, ptmpuserbuffer, 1);
	141	acb->wqbuf_lastindex++;
	142	acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
	143	ptmpuserbuffer++;
	144	user_len--;
	145	}
	146	if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
	147	acb->acb_flags &=
	148	~ACB_F_MESSAGE_WQBUFFER_CLEARED;
1a4f550a	149	arcmsr_post_ioctldata2iop(acb);
1c57e86d EC	150	}
	151	return count;
	152	} else {
	153	return 0; /need retry/
	154	}
	155	}
	156	}
	157
2c3c8bea CW	158	static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
2c3c8bea CW	159	struct kobject *kobj,
685b9e02 JB	160	struct bin_attribute *bin,
	161	char *buf, loff_t off,
	162	size_t count)
1c57e86d	163	{
ee959b00 TJ	164	struct device *dev = container_of(kobj,struct device,kobj);
ee959b00 TJ	165	struct Scsi_Host *host = class_to_shost(dev);
1c57e86d	166	struct AdapterControlBlock acb = (struct AdapterControlBlock ) host->hostdata;
1c57e86d EC	167	uint8_t *pQbuffer;
	168
	169	if (!capable(CAP_SYS_ADMIN))
	170	return -EACCES;
	171
	172	if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
	173	acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1a4f550a	174	arcmsr_iop_message_read(acb);
1c57e86d EC	175	}
	176	acb->acb_flags \|=
	177	(ACB_F_MESSAGE_WQBUFFER_CLEARED
	178	\| ACB_F_MESSAGE_RQBUFFER_CLEARED
	179	\| ACB_F_MESSAGE_WQBUFFER_READED);
	180	acb->rqbuf_firstindex = 0;
	181	acb->rqbuf_lastindex = 0;
	182	acb->wqbuf_firstindex = 0;
	183	acb->wqbuf_lastindex = 0;
	184	pQbuffer = acb->rqbuffer;
	185	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	186	pQbuffer = acb->wqbuffer;
	187	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	188	return 1;
	189	}
	190
	191	static struct bin_attribute arcmsr_sysfs_message_read_attr = {
	192	.attr = {
	193	.name = "mu_read",
	194	.mode = S_IRUSR ,
1c57e86d EC	195	},
	196	.size = 1032,
	197	.read = arcmsr_sysfs_iop_message_read,
	198	};
	199
	200	static struct bin_attribute arcmsr_sysfs_message_write_attr = {
	201	.attr = {
	202	.name = "mu_write",
	203	.mode = S_IWUSR,
1c57e86d EC	204	},
	205	.size = 1032,
	206	.write = arcmsr_sysfs_iop_message_write,
	207	};
	208
	209	static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
	210	.attr = {
	211	.name = "mu_clear",
	212	.mode = S_IWUSR,
1c57e86d EC	213	},
	214	.size = 1,
	215	.write = arcmsr_sysfs_iop_message_clear,
	216	};
	217
	218	int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
	219	{
	220	struct Scsi_Host *host = acb->host;
	221	int error;
	222
ee959b00	223	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	224	if (error) {
	225	printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
	226	goto error_bin_file_message_read;
	227	}
ee959b00	228	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
1c57e86d EC	229	if (error) {
	230	printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
	231	goto error_bin_file_message_write;
	232	}
ee959b00	233	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
1c57e86d EC	234	if (error) {
	235	printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
	236	goto error_bin_file_message_clear;
	237	}
	238	return 0;
	239	error_bin_file_message_clear:
ee959b00	240	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
1c57e86d	241	error_bin_file_message_write:
ee959b00	242	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	243	error_bin_file_message_read:
	244	return error;
	245	}
	246
ee959b00 TJ	247	void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
ee959b00 TJ	248	{
1c57e86d	249	struct Scsi_Host *host = acb->host;
1c57e86d	250
ee959b00 TJ	251	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
	252	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
	253	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	254	}
	255
	256
	257	static ssize_t
ee959b00 TJ	258	arcmsr_attr_host_driver_version(struct device *dev,
	259	struct device_attribute attr, char buf)
	260	{
1c57e86d	261	return snprintf(buf, PAGE_SIZE,
d67a70ac	262	"%s\n",
1c57e86d EC	263	ARCMSR_DRIVER_VERSION);
	264	}
	265
	266	static ssize_t
ee959b00 TJ	267	arcmsr_attr_host_driver_posted_cmd(struct device *dev,
	268	struct device_attribute attr, char buf)
	269	{
	270	struct Scsi_Host *host = class_to_shost(dev);
	271	struct AdapterControlBlock *acb =
	272	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	273	return snprintf(buf, PAGE_SIZE,
d67a70ac	274	"%4d\n",
1c57e86d EC	275	atomic_read(&acb->ccboutstandingcount));
	276	}
	277
	278	static ssize_t
ee959b00 TJ	279	arcmsr_attr_host_driver_reset(struct device *dev,
	280	struct device_attribute attr, char buf)
	281	{
	282	struct Scsi_Host *host = class_to_shost(dev);
	283	struct AdapterControlBlock *acb =
	284	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	285	return snprintf(buf, PAGE_SIZE,
d67a70ac	286	"%4d\n",
1c57e86d EC	287	acb->num_resets);
	288	}
	289
	290	static ssize_t
ee959b00 TJ	291	arcmsr_attr_host_driver_abort(struct device *dev,
	292	struct device_attribute attr, char buf)
	293	{
	294	struct Scsi_Host *host = class_to_shost(dev);
	295	struct AdapterControlBlock *acb =
	296	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	297	return snprintf(buf, PAGE_SIZE,
d67a70ac	298	"%4d\n",
1c57e86d EC	299	acb->num_aborts);
	300	}
	301
	302	static ssize_t
ee959b00 TJ	303	arcmsr_attr_host_fw_model(struct device dev, struct device_attribute attr,
	304	char *buf)
	305	{
	306	struct Scsi_Host *host = class_to_shost(dev);
	307	struct AdapterControlBlock *acb =
	308	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	309	return snprintf(buf, PAGE_SIZE,
d67a70ac	310	"%s\n",
1c57e86d EC	311	acb->firm_model);
	312	}
	313
	314	static ssize_t
ee959b00 TJ	315	arcmsr_attr_host_fw_version(struct device *dev,
	316	struct device_attribute attr, char buf)
	317	{
	318	struct Scsi_Host *host = class_to_shost(dev);
	319	struct AdapterControlBlock *acb =
	320	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	321
1c57e86d EC	322	return snprintf(buf, PAGE_SIZE,
d67a70ac	323	"%s\n",
1c57e86d EC	324	acb->firm_version);
	325	}
	326
	327	static ssize_t
ee959b00 TJ	328	arcmsr_attr_host_fw_request_len(struct device *dev,
	329	struct device_attribute attr, char buf)
	330	{
	331	struct Scsi_Host *host = class_to_shost(dev);
	332	struct AdapterControlBlock *acb =
	333	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	334
1c57e86d EC	335	return snprintf(buf, PAGE_SIZE,
d67a70ac	336	"%4d\n",
1c57e86d EC	337	acb->firm_request_len);
	338	}
	339
	340	static ssize_t
ee959b00 TJ	341	arcmsr_attr_host_fw_numbers_queue(struct device *dev,
	342	struct device_attribute attr, char buf)
	343	{
	344	struct Scsi_Host *host = class_to_shost(dev);
	345	struct AdapterControlBlock *acb =
	346	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	347
1c57e86d EC	348	return snprintf(buf, PAGE_SIZE,
d67a70ac	349	"%4d\n",
1c57e86d EC	350	acb->firm_numbers_queue);
	351	}
	352
	353	static ssize_t
ee959b00 TJ	354	arcmsr_attr_host_fw_sdram_size(struct device *dev,
	355	struct device_attribute attr, char buf)
	356	{
	357	struct Scsi_Host *host = class_to_shost(dev);
	358	struct AdapterControlBlock *acb =
	359	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	360
1c57e86d EC	361	return snprintf(buf, PAGE_SIZE,
d67a70ac	362	"%4d\n",
1c57e86d EC	363	acb->firm_sdram_size);
	364	}
	365
	366	static ssize_t
ee959b00 TJ	367	arcmsr_attr_host_fw_hd_channels(struct device *dev,
	368	struct device_attribute attr, char buf)
	369	{
	370	struct Scsi_Host *host = class_to_shost(dev);
	371	struct AdapterControlBlock *acb =
	372	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	373
1c57e86d EC	374	return snprintf(buf, PAGE_SIZE,
d67a70ac	375	"%4d\n",
1c57e86d EC	376	acb->firm_hd_channels);
	377	}
	378
ee959b00 TJ	379	static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
	380	static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
	381	static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
	382	static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
	383	static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
	384	static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
	385	static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
	386	static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
	387	static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
	388	static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
	389
	390	struct device_attribute *arcmsr_host_attrs[] = {
	391	&dev_attr_host_driver_version,
	392	&dev_attr_host_driver_posted_cmd,
	393	&dev_attr_host_driver_reset,
	394	&dev_attr_host_driver_abort,
	395	&dev_attr_host_fw_model,
	396	&dev_attr_host_fw_version,
	397	&dev_attr_host_fw_request_len,
	398	&dev_attr_host_fw_numbers_queue,
	399	&dev_attr_host_fw_sdram_size,
	400	&dev_attr_host_fw_hd_channels,
1c57e86d EC	401	NULL,
1c57e86d EC	402	};