[linux-2.6-block.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 <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 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 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 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>
2e9feb43	53	#include <linux/circ_buf.h>
1c57e86d EC	54
	55	#include <scsi/scsi_cmnd.h>
	56	#include <scsi/scsi_device.h>
	57	#include <scsi/scsi_host.h>
	58	#include <scsi/scsi_transport.h>
	59	#include "arcmsr.h"
	60
ee959b00	61	struct device_attribute *arcmsr_host_attrs[];
1c57e86d	62
2c3c8bea CW	63	static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
2c3c8bea CW	64	struct kobject *kobj,
685b9e02 JB	65	struct bin_attribute *bin,
	66	char *buf, loff_t off,
	67	size_t count)
1c57e86d	68	{
ee959b00 TJ	69	struct device *dev = container_of(kobj,struct device,kobj);
ee959b00 TJ	70	struct Scsi_Host *host = class_to_shost(dev);
1c57e86d	71	struct AdapterControlBlock acb = (struct AdapterControlBlock ) host->hostdata;
2e9feb43	72	uint8_t *ptmpQbuffer;
1c57e86d	73	int32_t allxfer_len = 0;
bb263c4e	74	unsigned long flags;
1c57e86d EC	75
	76	if (!capable(CAP_SYS_ADMIN))
	77	return -EACCES;
	78
	79	/* do message unit read. */
	80	ptmpQbuffer = (uint8_t *)buf;
bb263c4e	81	spin_lock_irqsave(&acb->rqbuffer_lock, flags);
2e9feb43 CH	82	if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
	83	unsigned int tail = acb->rqbuf_getIndex;
	84	unsigned int head = acb->rqbuf_putIndex;
	85	unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
	86
	87	allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
	88	if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
	89	allxfer_len = ARCMSR_API_DATA_BUFLEN;
	90
	91	if (allxfer_len <= cnt_to_end)
	92	memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
	93	else {
	94	memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
	95	memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
bb263c4e	96	}
2e9feb43	97	acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
1c57e86d EC	98	}
1c57e86d EC	99	if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
80da1adb	100	struct QBUFFER __iomem *prbuffer;
1c57e86d	101	acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1a4f550a	102	prbuffer = arcmsr_get_iop_rqbuffer(acb);
bb263c4e CH	103	if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
bb263c4e CH	104	acb->acb_flags \|= ACB_F_IOPDATA_OVERFLOW;
1c57e86d	105	}
bb263c4e CH	106	spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
bb263c4e CH	107	return allxfer_len;
1c57e86d EC	108	}
1c57e86d EC	109
2c3c8bea CW	110	static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
2c3c8bea CW	111	struct kobject *kobj,
685b9e02 JB	112	struct bin_attribute *bin,
	113	char *buf, loff_t off,
	114	size_t count)
1c57e86d	115	{
ee959b00 TJ	116	struct device *dev = container_of(kobj,struct device,kobj);
ee959b00 TJ	117	struct Scsi_Host *host = class_to_shost(dev);
1c57e86d	118	struct AdapterControlBlock acb = (struct AdapterControlBlock ) host->hostdata;
2e9feb43	119	int32_t user_len, cnt2end;
1c57e86d	120	uint8_t pQbuffer, ptmpuserbuffer;
bb263c4e	121	unsigned long flags;
1c57e86d EC	122
	123	if (!capable(CAP_SYS_ADMIN))
	124	return -EACCES;
2e9feb43	125	if (count > ARCMSR_API_DATA_BUFLEN)
1c57e86d EC	126	return -EINVAL;
	127	/* do message unit write. */
	128	ptmpuserbuffer = (uint8_t *)buf;
	129	user_len = (int32_t)count;
bb263c4e	130	spin_lock_irqsave(&acb->wqbuffer_lock, flags);
2e9feb43	131	if (acb->wqbuf_putIndex != acb->wqbuf_getIndex) {
bb263c4e CH	132	arcmsr_write_ioctldata2iop(acb);
bb263c4e CH	133	spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
1c57e86d EC	134	return 0; /need retry/
1c57e86d EC	135	} else {
2e9feb43 CH	136	pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
	137	cnt2end = ARCMSR_MAX_QBUFFER - acb->wqbuf_putIndex;
	138	if (user_len > cnt2end) {
	139	memcpy(pQbuffer, ptmpuserbuffer, cnt2end);
	140	ptmpuserbuffer += cnt2end;
	141	user_len -= cnt2end;
	142	acb->wqbuf_putIndex = 0;
	143	pQbuffer = acb->wqbuffer;
1c57e86d	144	}
2e9feb43 CH	145	memcpy(pQbuffer, ptmpuserbuffer, user_len);
	146	acb->wqbuf_putIndex += user_len;
	147	acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
	148	if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
	149	acb->acb_flags &=
	150	~ACB_F_MESSAGE_WQBUFFER_CLEARED;
	151	arcmsr_write_ioctldata2iop(acb);
	152	}
	153	spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
	154	return count;
1c57e86d EC	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	167	uint8_t *pQbuffer;
bb263c4e	168	unsigned long flags;
1c57e86d EC	169
	170	if (!capable(CAP_SYS_ADMIN))
	171	return -EACCES;
	172
bb263c4e	173	arcmsr_clear_iop2drv_rqueue_buffer(acb);
1c57e86d EC	174	acb->acb_flags \|=
	175	(ACB_F_MESSAGE_WQBUFFER_CLEARED
	176	\| ACB_F_MESSAGE_RQBUFFER_CLEARED
	177	\| ACB_F_MESSAGE_WQBUFFER_READED);
bb263c4e	178	spin_lock_irqsave(&acb->rqbuffer_lock, flags);
2e9feb43 CH	179	acb->rqbuf_getIndex = 0;
2e9feb43 CH	180	acb->rqbuf_putIndex = 0;
bb263c4e CH	181	spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
bb263c4e CH	182	spin_lock_irqsave(&acb->wqbuffer_lock, flags);
2e9feb43 CH	183	acb->wqbuf_getIndex = 0;
2e9feb43 CH	184	acb->wqbuf_putIndex = 0;
bb263c4e	185	spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
1c57e86d EC	186	pQbuffer = acb->rqbuffer;
	187	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	188	pQbuffer = acb->wqbuffer;
	189	memset(pQbuffer, 0, sizeof (struct QBUFFER));
	190	return 1;
	191	}
	192
	193	static struct bin_attribute arcmsr_sysfs_message_read_attr = {
	194	.attr = {
	195	.name = "mu_read",
	196	.mode = S_IRUSR ,
1c57e86d	197	},
2e9feb43	198	.size = ARCMSR_API_DATA_BUFLEN,
1c57e86d EC	199	.read = arcmsr_sysfs_iop_message_read,
	200	};
	201
	202	static struct bin_attribute arcmsr_sysfs_message_write_attr = {
	203	.attr = {
	204	.name = "mu_write",
	205	.mode = S_IWUSR,
1c57e86d	206	},
2e9feb43	207	.size = ARCMSR_API_DATA_BUFLEN,
1c57e86d EC	208	.write = arcmsr_sysfs_iop_message_write,
	209	};
	210
	211	static struct bin_attribute arcmsr_sysfs_message_clear_attr = {
	212	.attr = {
	213	.name = "mu_clear",
	214	.mode = S_IWUSR,
1c57e86d EC	215	},
	216	.size = 1,
	217	.write = arcmsr_sysfs_iop_message_clear,
	218	};
	219
	220	int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *acb)
	221	{
	222	struct Scsi_Host *host = acb->host;
	223	int error;
	224
ee959b00	225	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	226	if (error) {
	227	printk(KERN_ERR "arcmsr: alloc sysfs mu_read failed\n");
	228	goto error_bin_file_message_read;
	229	}
ee959b00	230	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
1c57e86d EC	231	if (error) {
	232	printk(KERN_ERR "arcmsr: alloc sysfs mu_write failed\n");
	233	goto error_bin_file_message_write;
	234	}
ee959b00	235	error = sysfs_create_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
1c57e86d EC	236	if (error) {
	237	printk(KERN_ERR "arcmsr: alloc sysfs mu_clear failed\n");
	238	goto error_bin_file_message_clear;
	239	}
	240	return 0;
	241	error_bin_file_message_clear:
ee959b00	242	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
1c57e86d	243	error_bin_file_message_write:
ee959b00	244	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	245	error_bin_file_message_read:
	246	return error;
	247	}
	248
ee959b00 TJ	249	void arcmsr_free_sysfs_attr(struct AdapterControlBlock *acb)
ee959b00 TJ	250	{
1c57e86d	251	struct Scsi_Host *host = acb->host;
1c57e86d	252
ee959b00 TJ	253	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_clear_attr);
	254	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_write_attr);
	255	sysfs_remove_bin_file(&host->shost_dev.kobj, &arcmsr_sysfs_message_read_attr);
1c57e86d EC	256	}
	257
	258
	259	static ssize_t
ee959b00 TJ	260	arcmsr_attr_host_driver_version(struct device *dev,
	261	struct device_attribute attr, char buf)
	262	{
1c57e86d	263	return snprintf(buf, PAGE_SIZE,
d67a70ac	264	"%s\n",
1c57e86d EC	265	ARCMSR_DRIVER_VERSION);
	266	}
	267
	268	static ssize_t
ee959b00 TJ	269	arcmsr_attr_host_driver_posted_cmd(struct device *dev,
	270	struct device_attribute attr, char buf)
	271	{
	272	struct Scsi_Host *host = class_to_shost(dev);
	273	struct AdapterControlBlock *acb =
	274	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	275	return snprintf(buf, PAGE_SIZE,
d67a70ac	276	"%4d\n",
1c57e86d EC	277	atomic_read(&acb->ccboutstandingcount));
	278	}
	279
	280	static ssize_t
ee959b00 TJ	281	arcmsr_attr_host_driver_reset(struct device *dev,
	282	struct device_attribute attr, char buf)
	283	{
	284	struct Scsi_Host *host = class_to_shost(dev);
	285	struct AdapterControlBlock *acb =
	286	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	287	return snprintf(buf, PAGE_SIZE,
d67a70ac	288	"%4d\n",
1c57e86d EC	289	acb->num_resets);
	290	}
	291
	292	static ssize_t
ee959b00 TJ	293	arcmsr_attr_host_driver_abort(struct device *dev,
	294	struct device_attribute attr, char buf)
	295	{
	296	struct Scsi_Host *host = class_to_shost(dev);
	297	struct AdapterControlBlock *acb =
	298	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	299	return snprintf(buf, PAGE_SIZE,
d67a70ac	300	"%4d\n",
1c57e86d EC	301	acb->num_aborts);
	302	}
	303
	304	static ssize_t
ee959b00 TJ	305	arcmsr_attr_host_fw_model(struct device dev, struct device_attribute attr,
	306	char *buf)
	307	{
	308	struct Scsi_Host *host = class_to_shost(dev);
	309	struct AdapterControlBlock *acb =
	310	(struct AdapterControlBlock *) host->hostdata;
1c57e86d	311	return snprintf(buf, PAGE_SIZE,
d67a70ac	312	"%s\n",
1c57e86d EC	313	acb->firm_model);
	314	}
	315
	316	static ssize_t
ee959b00 TJ	317	arcmsr_attr_host_fw_version(struct device *dev,
	318	struct device_attribute attr, char buf)
	319	{
	320	struct Scsi_Host *host = class_to_shost(dev);
	321	struct AdapterControlBlock *acb =
	322	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	323
1c57e86d EC	324	return snprintf(buf, PAGE_SIZE,
d67a70ac	325	"%s\n",
1c57e86d EC	326	acb->firm_version);
	327	}
	328
	329	static ssize_t
ee959b00 TJ	330	arcmsr_attr_host_fw_request_len(struct device *dev,
	331	struct device_attribute attr, char buf)
	332	{
	333	struct Scsi_Host *host = class_to_shost(dev);
	334	struct AdapterControlBlock *acb =
	335	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	336
1c57e86d EC	337	return snprintf(buf, PAGE_SIZE,
d67a70ac	338	"%4d\n",
1c57e86d EC	339	acb->firm_request_len);
	340	}
	341
	342	static ssize_t
ee959b00 TJ	343	arcmsr_attr_host_fw_numbers_queue(struct device *dev,
	344	struct device_attribute attr, char buf)
	345	{
	346	struct Scsi_Host *host = class_to_shost(dev);
	347	struct AdapterControlBlock *acb =
	348	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	349
1c57e86d EC	350	return snprintf(buf, PAGE_SIZE,
d67a70ac	351	"%4d\n",
1c57e86d EC	352	acb->firm_numbers_queue);
	353	}
	354
	355	static ssize_t
ee959b00 TJ	356	arcmsr_attr_host_fw_sdram_size(struct device *dev,
	357	struct device_attribute attr, char buf)
	358	{
	359	struct Scsi_Host *host = class_to_shost(dev);
	360	struct AdapterControlBlock *acb =
	361	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	362
1c57e86d EC	363	return snprintf(buf, PAGE_SIZE,
d67a70ac	364	"%4d\n",
1c57e86d EC	365	acb->firm_sdram_size);
	366	}
	367
	368	static ssize_t
ee959b00 TJ	369	arcmsr_attr_host_fw_hd_channels(struct device *dev,
	370	struct device_attribute attr, char buf)
	371	{
	372	struct Scsi_Host *host = class_to_shost(dev);
	373	struct AdapterControlBlock *acb =
	374	(struct AdapterControlBlock *) host->hostdata;
1c57e86d EC	375
1c57e86d EC	376	return snprintf(buf, PAGE_SIZE,
d67a70ac	377	"%4d\n",
1c57e86d EC	378	acb->firm_hd_channels);
	379	}
	380
ee959b00 TJ	381	static DEVICE_ATTR(host_driver_version, S_IRUGO, arcmsr_attr_host_driver_version, NULL);
	382	static DEVICE_ATTR(host_driver_posted_cmd, S_IRUGO, arcmsr_attr_host_driver_posted_cmd, NULL);
	383	static DEVICE_ATTR(host_driver_reset, S_IRUGO, arcmsr_attr_host_driver_reset, NULL);
	384	static DEVICE_ATTR(host_driver_abort, S_IRUGO, arcmsr_attr_host_driver_abort, NULL);
	385	static DEVICE_ATTR(host_fw_model, S_IRUGO, arcmsr_attr_host_fw_model, NULL);
	386	static DEVICE_ATTR(host_fw_version, S_IRUGO, arcmsr_attr_host_fw_version, NULL);
	387	static DEVICE_ATTR(host_fw_request_len, S_IRUGO, arcmsr_attr_host_fw_request_len, NULL);
	388	static DEVICE_ATTR(host_fw_numbers_queue, S_IRUGO, arcmsr_attr_host_fw_numbers_queue, NULL);
	389	static DEVICE_ATTR(host_fw_sdram_size, S_IRUGO, arcmsr_attr_host_fw_sdram_size, NULL);
	390	static DEVICE_ATTR(host_fw_hd_channels, S_IRUGO, arcmsr_attr_host_fw_hd_channels, NULL);
	391
	392	struct device_attribute *arcmsr_host_attrs[] = {
	393	&dev_attr_host_driver_version,
	394	&dev_attr_host_driver_posted_cmd,
	395	&dev_attr_host_driver_reset,
	396	&dev_attr_host_driver_abort,
	397	&dev_attr_host_fw_model,
	398	&dev_attr_host_fw_version,
	399	&dev_attr_host_fw_request_len,
	400	&dev_attr_host_fw_numbers_queue,
	401	&dev_attr_host_fw_sdram_size,
	402	&dev_attr_host_fw_hd_channels,
1c57e86d EC	403	NULL,
1c57e86d EC	404	};