[deliverable/linux.git] / drivers / misc / mic / host / mic_sysfs.c

/*
 * Intel MIC Platform Software Stack (MPSS)
 *
 * Copyright(c) 2013 Intel Corporation.
 *
 * 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.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Intel MIC Host driver.
 *
 */
#include <linux/pci.h>

#include <linux/mic_common.h>
#include "../common/mic_dev.h"
#include "mic_device.h"

/*
 * A state-to-string lookup table, for exposing a human readable state
 * via sysfs. Always keep in sync with enum mic_states
 */
static const char * const mic_state_string[] = {
	[MIC_OFFLINE] = "offline",
	[MIC_ONLINE] = "online",
	[MIC_SHUTTING_DOWN] = "shutting_down",
	[MIC_RESET_FAILED] = "reset_failed",
};

/*
 * A shutdown-status-to-string lookup table, for exposing a human
 * readable state via sysfs. Always keep in sync with enum mic_shutdown_status
 */
static const char * const mic_shutdown_status_string[] = {
	[MIC_NOP] = "nop",
	[MIC_CRASHED] = "crashed",
	[MIC_HALTED] = "halted",
	[MIC_POWER_OFF] = "poweroff",
	[MIC_RESTART] = "restart",
};

void mic_set_shutdown_status(struct mic_device *mdev, u8 shutdown_status)
{
	dev_dbg(mdev->sdev->parent, "Shutdown Status %s -> %s\n",
		mic_shutdown_status_string[mdev->shutdown_status],
		mic_shutdown_status_string[shutdown_status]);
	mdev->shutdown_status = shutdown_status;
}

void mic_set_state(struct mic_device *mdev, u8 state)
{
	dev_dbg(mdev->sdev->parent, "State %s -> %s\n",
		mic_state_string[mdev->state],
		mic_state_string[state]);
	mdev->state = state;
	sysfs_notify_dirent(mdev->state_sysfs);
}

static ssize_t
family_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	static const char x100[] = "x100";
	static const char unknown[] = "Unknown";
	const char *card = NULL;
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	switch (mdev->family) {
	case MIC_FAMILY_X100:
		card = x100;
		break;
	default:
		card = unknown;
		break;
	}
	return scnprintf(buf, PAGE_SIZE, "%s\n", card);
}
static DEVICE_ATTR_RO(family);

static ssize_t
stepping_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	char *string = "??";

	if (!mdev)
		return -EINVAL;

	switch (mdev->stepping) {
	case MIC_A0_STEP:
		string = "A0";
		break;
	case MIC_B0_STEP:
		string = "B0";
		break;
	case MIC_B1_STEP:
		string = "B1";
		break;
	case MIC_C0_STEP:
		string = "C0";
		break;
	default:
		break;
	}
	return scnprintf(buf, PAGE_SIZE, "%s\n", string);
}
static DEVICE_ATTR_RO(stepping);

static ssize_t
state_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev || mdev->state >= MIC_LAST)
		return -EINVAL;

	return scnprintf(buf, PAGE_SIZE, "%s\n",
		mic_state_string[mdev->state]);
}

static ssize_t
state_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	int rc = 0;
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	if (!mdev)
		return -EINVAL;
	if (sysfs_streq(buf, "boot")) {
		rc = mic_start(mdev, buf);
		if (rc) {
			dev_err(mdev->sdev->parent,
				"mic_boot failed rc %d\n", rc);
			count = rc;
		}
		goto done;
	}

	if (sysfs_streq(buf, "reset")) {
		schedule_work(&mdev->reset_trigger_work);
		goto done;
	}

	if (sysfs_streq(buf, "shutdown")) {
		mic_shutdown(mdev);
		goto done;
	}

	count = -EINVAL;
done:
	return count;
}
static DEVICE_ATTR_RW(state);

static ssize_t shutdown_status_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev || mdev->shutdown_status >= MIC_STATUS_LAST)
		return -EINVAL;

	return scnprintf(buf, PAGE_SIZE, "%s\n",
		mic_shutdown_status_string[mdev->shutdown_status]);
}
static DEVICE_ATTR_RO(shutdown_status);

static ssize_t
cmdline_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	char *cmdline;

	if (!mdev)
		return -EINVAL;

	cmdline = mdev->cmdline;

	if (cmdline)
		return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
	return 0;
}

static ssize_t
cmdline_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	mutex_lock(&mdev->mic_mutex);
	kfree(mdev->cmdline);

	mdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
	if (!mdev->cmdline) {
		count = -ENOMEM;
		goto unlock;
	}

	strncpy(mdev->cmdline, buf, count);

	if (mdev->cmdline[count - 1] == '\n')
		mdev->cmdline[count - 1] = '\0';
	else
		mdev->cmdline[count] = '\0';
unlock:
	mutex_unlock(&mdev->mic_mutex);
	return count;
}
static DEVICE_ATTR_RW(cmdline);

static ssize_t
firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	char *firmware;

	if (!mdev)
		return -EINVAL;

	firmware = mdev->firmware;

	if (firmware)
		return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
	return 0;
}

static ssize_t
firmware_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	mutex_lock(&mdev->mic_mutex);
	kfree(mdev->firmware);

	mdev->firmware = kmalloc(count + 1, GFP_KERNEL);
	if (!mdev->firmware) {
		count = -ENOMEM;
		goto unlock;
	}
	strncpy(mdev->firmware, buf, count);

	if (mdev->firmware[count - 1] == '\n')
		mdev->firmware[count - 1] = '\0';
	else
		mdev->firmware[count] = '\0';
unlock:
	mutex_unlock(&mdev->mic_mutex);
	return count;
}
static DEVICE_ATTR_RW(firmware);

static ssize_t
ramdisk_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	char *ramdisk;

	if (!mdev)
		return -EINVAL;

	ramdisk = mdev->ramdisk;

	if (ramdisk)
		return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
	return 0;
}

static ssize_t
ramdisk_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	mutex_lock(&mdev->mic_mutex);
	kfree(mdev->ramdisk);

	mdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
	if (!mdev->ramdisk) {
		count = -ENOMEM;
		goto unlock;
	}

	strncpy(mdev->ramdisk, buf, count);

	if (mdev->ramdisk[count - 1] == '\n')
		mdev->ramdisk[count - 1] = '\0';
	else
		mdev->ramdisk[count] = '\0';
unlock:
	mutex_unlock(&mdev->mic_mutex);
	return count;
}
static DEVICE_ATTR_RW(ramdisk);

static ssize_t
bootmode_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	char *bootmode;

	if (!mdev)
		return -EINVAL;

	bootmode = mdev->bootmode;

	if (bootmode)
		return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
	return 0;
}

static ssize_t
bootmode_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "elf"))
		return -EINVAL;

	mutex_lock(&mdev->mic_mutex);
	kfree(mdev->bootmode);

	mdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
	if (!mdev->bootmode) {
		count = -ENOMEM;
		goto unlock;
	}

	strncpy(mdev->bootmode, buf, count);

	if (mdev->bootmode[count - 1] == '\n')
		mdev->bootmode[count - 1] = '\0';
	else
		mdev->bootmode[count] = '\0';
unlock:
	mutex_unlock(&mdev->mic_mutex);
	return count;
}
static DEVICE_ATTR_RW(bootmode);

static ssize_t
log_buf_addr_show(struct device *dev, struct device_attribute *attr,
	char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_addr);
}

static ssize_t
log_buf_addr_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	int ret;
	unsigned long addr;

	if (!mdev)
		return -EINVAL;

	ret = kstrtoul(buf, 16, &addr);
	if (ret)
		goto exit;

	mdev->log_buf_addr = (void *)addr;
	ret = count;
exit:
	return ret;
}
static DEVICE_ATTR_RW(log_buf_addr);

static ssize_t
log_buf_len_show(struct device *dev, struct device_attribute *attr,
	char *buf)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);

	if (!mdev)
		return -EINVAL;

	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_len);
}

static ssize_t
log_buf_len_store(struct device *dev, struct device_attribute *attr,
	const char *buf, size_t count)
{
	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	int ret;
	unsigned long addr;

	if (!mdev)
		return -EINVAL;

	ret = kstrtoul(buf, 16, &addr);
	if (ret)
		goto exit;

	mdev->log_buf_len = (int *)addr;
	ret = count;
exit:
	return ret;
}
static DEVICE_ATTR_RW(log_buf_len);

static struct attribute *mic_default_attrs[] = {
	&dev_attr_family.attr,
	&dev_attr_stepping.attr,
	&dev_attr_state.attr,
	&dev_attr_shutdown_status.attr,
	&dev_attr_cmdline.attr,
	&dev_attr_firmware.attr,
	&dev_attr_ramdisk.attr,
	&dev_attr_bootmode.attr,
	&dev_attr_log_buf_addr.attr,
	&dev_attr_log_buf_len.attr,

	NULL
};

ATTRIBUTE_GROUPS(mic_default);

void mic_sysfs_init(struct mic_device *mdev)
{
	mdev->attr_group = mic_default_groups;
}
Commit	Line	Data
b170d8ce SD	1	/*
	2	* Intel MIC Platform Software Stack (MPSS)
	3	*
	4	* Copyright(c) 2013 Intel Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, version 2, as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* The full GNU General Public License is included in this distribution in
	16	* the file called "COPYING".
	17	*
	18	* Intel MIC Host driver.
	19	*
	20	*/
	21	#include <linux/pci.h>
	22
3a6a9201	23	#include <linux/mic_common.h>
4aa79961	24	#include "../common/mic_dev.h"
b170d8ce SD	25	#include "mic_device.h"
b170d8ce SD	26
3a6a9201 SD	27	/*
	28	* A state-to-string lookup table, for exposing a human readable state
	29	* via sysfs. Always keep in sync with enum mic_states
	30	*/
	31	static const char * const mic_state_string[] = {
	32	[MIC_OFFLINE] = "offline",
	33	[MIC_ONLINE] = "online",
	34	[MIC_SHUTTING_DOWN] = "shutting_down",
	35	[MIC_RESET_FAILED] = "reset_failed",
	36	};
	37
	38	/*
	39	* A shutdown-status-to-string lookup table, for exposing a human
	40	* readable state via sysfs. Always keep in sync with enum mic_shutdown_status
	41	*/
	42	static const char * const mic_shutdown_status_string[] = {
	43	[MIC_NOP] = "nop",
	44	[MIC_CRASHED] = "crashed",
	45	[MIC_HALTED] = "halted",
	46	[MIC_POWER_OFF] = "poweroff",
	47	[MIC_RESTART] = "restart",
	48	};
	49
	50	void mic_set_shutdown_status(struct mic_device *mdev, u8 shutdown_status)
	51	{
	52	dev_dbg(mdev->sdev->parent, "Shutdown Status %s -> %s\n",
	53	mic_shutdown_status_string[mdev->shutdown_status],
	54	mic_shutdown_status_string[shutdown_status]);
	55	mdev->shutdown_status = shutdown_status;
	56	}
	57
	58	void mic_set_state(struct mic_device *mdev, u8 state)
	59	{
	60	dev_dbg(mdev->sdev->parent, "State %s -> %s\n",
	61	mic_state_string[mdev->state],
	62	mic_state_string[state]);
	63	mdev->state = state;
	64	sysfs_notify_dirent(mdev->state_sysfs);
	65	}
	66
b170d8ce	67	static ssize_t
2ce58528	68	family_show(struct device dev, struct device_attribute attr, char *buf)
b170d8ce SD	69	{
	70	static const char x100[] = "x100";
	71	static const char unknown[] = "Unknown";
	72	const char *card = NULL;
	73	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	74
	75	if (!mdev)
	76	return -EINVAL;
	77
	78	switch (mdev->family) {
	79	case MIC_FAMILY_X100:
	80	card = x100;
	81	break;
	82	default:
	83	card = unknown;
	84	break;
	85	}
	86	return scnprintf(buf, PAGE_SIZE, "%s\n", card);
	87	}
2ce58528	88	static DEVICE_ATTR_RO(family);
b170d8ce SD	89
b170d8ce SD	90	static ssize_t
2ce58528	91	stepping_show(struct device dev, struct device_attribute attr, char *buf)
b170d8ce SD	92	{
	93	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	94	char *string = "??";
	95
	96	if (!mdev)
	97	return -EINVAL;
	98
	99	switch (mdev->stepping) {
	100	case MIC_A0_STEP:
	101	string = "A0";
	102	break;
	103	case MIC_B0_STEP:
	104	string = "B0";
	105	break;
	106	case MIC_B1_STEP:
	107	string = "B1";
	108	break;
	109	case MIC_C0_STEP:
	110	string = "C0";
	111	break;
	112	default:
	113	break;
	114	}
	115	return scnprintf(buf, PAGE_SIZE, "%s\n", string);
	116	}
2ce58528	117	static DEVICE_ATTR_RO(stepping);
b170d8ce	118
3a6a9201	119	static ssize_t
2ce58528	120	state_show(struct device dev, struct device_attribute attr, char *buf)
3a6a9201 SD	121	{
	122	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	123
	124	if (!mdev \|\| mdev->state >= MIC_LAST)
	125	return -EINVAL;
	126
	127	return scnprintf(buf, PAGE_SIZE, "%s\n",
	128	mic_state_string[mdev->state]);
	129	}
	130
	131	static ssize_t
2ce58528	132	state_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	133	const char *buf, size_t count)
	134	{
	135	int rc = 0;
	136	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	137	if (!mdev)
	138	return -EINVAL;
	139	if (sysfs_streq(buf, "boot")) {
	140	rc = mic_start(mdev, buf);
	141	if (rc) {
	142	dev_err(mdev->sdev->parent,
	143	"mic_boot failed rc %d\n", rc);
	144	count = rc;
	145	}
	146	goto done;
	147	}
	148
	149	if (sysfs_streq(buf, "reset")) {
	150	schedule_work(&mdev->reset_trigger_work);
	151	goto done;
	152	}
	153
	154	if (sysfs_streq(buf, "shutdown")) {
	155	mic_shutdown(mdev);
	156	goto done;
	157	}
	158
	159	count = -EINVAL;
	160	done:
	161	return count;
	162	}
2ce58528	163	static DEVICE_ATTR_RW(state);
3a6a9201	164
2ce58528	165	static ssize_t shutdown_status_show(struct device *dev,
3a6a9201 SD	166	struct device_attribute attr, char buf)
	167	{
	168	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	169
	170	if (!mdev \|\| mdev->shutdown_status >= MIC_STATUS_LAST)
	171	return -EINVAL;
	172
	173	return scnprintf(buf, PAGE_SIZE, "%s\n",
	174	mic_shutdown_status_string[mdev->shutdown_status]);
	175	}
2ce58528	176	static DEVICE_ATTR_RO(shutdown_status);
3a6a9201 SD	177
3a6a9201 SD	178	static ssize_t
2ce58528	179	cmdline_show(struct device dev, struct device_attribute attr, char *buf)
3a6a9201 SD	180	{
	181	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	182	char *cmdline;
	183
	184	if (!mdev)
	185	return -EINVAL;
	186
	187	cmdline = mdev->cmdline;
	188
	189	if (cmdline)
	190	return scnprintf(buf, PAGE_SIZE, "%s\n", cmdline);
	191	return 0;
	192	}
	193
	194	static ssize_t
2ce58528	195	cmdline_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	196	const char *buf, size_t count)
	197	{
	198	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	199
	200	if (!mdev)
	201	return -EINVAL;
	202
	203	mutex_lock(&mdev->mic_mutex);
	204	kfree(mdev->cmdline);
	205
	206	mdev->cmdline = kmalloc(count + 1, GFP_KERNEL);
	207	if (!mdev->cmdline) {
	208	count = -ENOMEM;
	209	goto unlock;
	210	}
	211
	212	strncpy(mdev->cmdline, buf, count);
	213
	214	if (mdev->cmdline[count - 1] == '\n')
	215	mdev->cmdline[count - 1] = '\0';
	216	else
	217	mdev->cmdline[count] = '\0';
	218	unlock:
	219	mutex_unlock(&mdev->mic_mutex);
	220	return count;
	221	}
2ce58528	222	static DEVICE_ATTR_RW(cmdline);
3a6a9201 SD	223
3a6a9201 SD	224	static ssize_t
2ce58528	225	firmware_show(struct device dev, struct device_attribute attr, char *buf)
3a6a9201 SD	226	{
	227	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	228	char *firmware;
	229
	230	if (!mdev)
	231	return -EINVAL;
	232
	233	firmware = mdev->firmware;
	234
	235	if (firmware)
	236	return scnprintf(buf, PAGE_SIZE, "%s\n", firmware);
	237	return 0;
	238	}
	239
	240	static ssize_t
2ce58528	241	firmware_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	242	const char *buf, size_t count)
	243	{
	244	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	245
	246	if (!mdev)
	247	return -EINVAL;
	248
	249	mutex_lock(&mdev->mic_mutex);
	250	kfree(mdev->firmware);
	251
	252	mdev->firmware = kmalloc(count + 1, GFP_KERNEL);
	253	if (!mdev->firmware) {
	254	count = -ENOMEM;
	255	goto unlock;
	256	}
	257	strncpy(mdev->firmware, buf, count);
	258
	259	if (mdev->firmware[count - 1] == '\n')
	260	mdev->firmware[count - 1] = '\0';
	261	else
	262	mdev->firmware[count] = '\0';
	263	unlock:
	264	mutex_unlock(&mdev->mic_mutex);
	265	return count;
	266	}
2ce58528	267	static DEVICE_ATTR_RW(firmware);
3a6a9201 SD	268
3a6a9201 SD	269	static ssize_t
2ce58528	270	ramdisk_show(struct device dev, struct device_attribute attr, char *buf)
3a6a9201 SD	271	{
	272	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	273	char *ramdisk;
	274
	275	if (!mdev)
	276	return -EINVAL;
	277
	278	ramdisk = mdev->ramdisk;
	279
	280	if (ramdisk)
	281	return scnprintf(buf, PAGE_SIZE, "%s\n", ramdisk);
	282	return 0;
	283	}
	284
	285	static ssize_t
2ce58528	286	ramdisk_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	287	const char *buf, size_t count)
	288	{
	289	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	290
	291	if (!mdev)
	292	return -EINVAL;
	293
	294	mutex_lock(&mdev->mic_mutex);
	295	kfree(mdev->ramdisk);
	296
	297	mdev->ramdisk = kmalloc(count + 1, GFP_KERNEL);
	298	if (!mdev->ramdisk) {
	299	count = -ENOMEM;
	300	goto unlock;
	301	}
	302
	303	strncpy(mdev->ramdisk, buf, count);
	304
	305	if (mdev->ramdisk[count - 1] == '\n')
	306	mdev->ramdisk[count - 1] = '\0';
	307	else
	308	mdev->ramdisk[count] = '\0';
	309	unlock:
	310	mutex_unlock(&mdev->mic_mutex);
	311	return count;
	312	}
2ce58528	313	static DEVICE_ATTR_RW(ramdisk);
3a6a9201 SD	314
3a6a9201 SD	315	static ssize_t
2ce58528	316	bootmode_show(struct device dev, struct device_attribute attr, char *buf)
3a6a9201 SD	317	{
	318	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	319	char *bootmode;
	320
	321	if (!mdev)
	322	return -EINVAL;
	323
	324	bootmode = mdev->bootmode;
	325
	326	if (bootmode)
	327	return scnprintf(buf, PAGE_SIZE, "%s\n", bootmode);
	328	return 0;
	329	}
	330
	331	static ssize_t
2ce58528	332	bootmode_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	333	const char *buf, size_t count)
	334	{
	335	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	336
	337	if (!mdev)
	338	return -EINVAL;
	339
	340	if (!sysfs_streq(buf, "linux") && !sysfs_streq(buf, "elf"))
	341	return -EINVAL;
	342
	343	mutex_lock(&mdev->mic_mutex);
	344	kfree(mdev->bootmode);
	345
	346	mdev->bootmode = kmalloc(count + 1, GFP_KERNEL);
	347	if (!mdev->bootmode) {
	348	count = -ENOMEM;
	349	goto unlock;
	350	}
	351
	352	strncpy(mdev->bootmode, buf, count);
	353
	354	if (mdev->bootmode[count - 1] == '\n')
	355	mdev->bootmode[count - 1] = '\0';
	356	else
	357	mdev->bootmode[count] = '\0';
	358	unlock:
	359	mutex_unlock(&mdev->mic_mutex);
	360	return count;
	361	}
2ce58528	362	static DEVICE_ATTR_RW(bootmode);
3a6a9201 SD	363
3a6a9201 SD	364	static ssize_t
2ce58528	365	log_buf_addr_show(struct device dev, struct device_attribute attr,
3a6a9201 SD	366	char *buf)
	367	{
	368	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	369
	370	if (!mdev)
	371	return -EINVAL;
	372
	373	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_addr);
	374	}
	375
	376	static ssize_t
2ce58528	377	log_buf_addr_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	378	const char *buf, size_t count)
	379	{
	380	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	381	int ret;
	382	unsigned long addr;
	383
	384	if (!mdev)
	385	return -EINVAL;
	386
	387	ret = kstrtoul(buf, 16, &addr);
	388	if (ret)
	389	goto exit;
	390
	391	mdev->log_buf_addr = (void *)addr;
	392	ret = count;
	393	exit:
	394	return ret;
	395	}
2ce58528	396	static DEVICE_ATTR_RW(log_buf_addr);
3a6a9201 SD	397
3a6a9201 SD	398	static ssize_t
2ce58528	399	log_buf_len_show(struct device dev, struct device_attribute attr,
3a6a9201 SD	400	char *buf)
	401	{
	402	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	403
	404	if (!mdev)
	405	return -EINVAL;
	406
	407	return scnprintf(buf, PAGE_SIZE, "%p\n", mdev->log_buf_len);
	408	}
	409
	410	static ssize_t
2ce58528	411	log_buf_len_store(struct device dev, struct device_attribute attr,
3a6a9201 SD	412	const char *buf, size_t count)
	413	{
	414	struct mic_device *mdev = dev_get_drvdata(dev->parent);
	415	int ret;
	416	unsigned long addr;
	417
	418	if (!mdev)
	419	return -EINVAL;
	420
	421	ret = kstrtoul(buf, 16, &addr);
	422	if (ret)
	423	goto exit;
	424
	425	mdev->log_buf_len = (int *)addr;
	426	ret = count;
	427	exit:
	428	return ret;
	429	}
2ce58528	430	static DEVICE_ATTR_RW(log_buf_len);
3a6a9201	431
b170d8ce SD	432	static struct attribute *mic_default_attrs[] = {
	433	&dev_attr_family.attr,
	434	&dev_attr_stepping.attr,
3a6a9201 SD	435	&dev_attr_state.attr,
	436	&dev_attr_shutdown_status.attr,
	437	&dev_attr_cmdline.attr,
	438	&dev_attr_firmware.attr,
	439	&dev_attr_ramdisk.attr,
	440	&dev_attr_bootmode.attr,
	441	&dev_attr_log_buf_addr.attr,
	442	&dev_attr_log_buf_len.attr,
b170d8ce SD	443
	444	NULL
	445	};
	446
2ce58528	447	ATTRIBUTE_GROUPS(mic_default);
b170d8ce SD	448
	449	void mic_sysfs_init(struct mic_device *mdev)
	450	{
2ce58528	451	mdev->attr_group = mic_default_groups;
b170d8ce	452	}