Release 4.11 drivers/edac/edac_mc_sysfs.c

/*
 * edac_mc kernel module
 * (C) 2005-2007 Linux Networx (http://lnxi.com)
 *
 * This file may be distributed under the terms of the
 * GNU General Public License.
 *
 * Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
 *
 * (c) 2012-2013 - Mauro Carvalho Chehab
 *      The entire API were re-written, and ported to use struct device
 *
 */

#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/edac.h>
#include <linux/bug.h>
#include <linux/pm_runtime.h>
#include <linux/uaccess.h>

#include "edac_mc.h"
#include "edac_module.h"

/* MC EDAC Controls, setable by module parameter, and sysfs */

static int edac_mc_log_ue = 1;

static int edac_mc_log_ce = 1;

static int edac_mc_panic_on_ue;

static int edac_mc_poll_msec = 1000;

/* Getter functions for above */


int edac_mc_get_log_ue(void)
{
	return edac_mc_log_ue;
}

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int edac_mc_get_log_ce(void)
{
	return edac_mc_log_ce;
}

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int edac_mc_get_panic_on_ue(void)
{
	return edac_mc_panic_on_ue;
}

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/* this is temporary */


int edac_mc_get_poll_msec(void)
{
	return edac_mc_poll_msec;
}

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static int edac_set_poll_msec(const char *val, struct kernel_param *kp)
{
	unsigned long l;
	int ret;

	if (!val)
		return -EINVAL;

	ret = kstrtoul(val, 0, &l);
	if (ret)
		return ret;

	if (l < 1000)
		return -EINVAL;

	*((unsigned long *)kp->arg) = l;

	/* notify edac_mc engine to reset the poll period */
	edac_mc_reset_delay_period(l);

	return 0;
}

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/* Parameter declarations for above */
module_param(edac_mc_panic_on_ue, int, 0644);
MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
module_param(edac_mc_log_ue, int, 0644);
MODULE_PARM_DESC(edac_mc_log_ue,
		 "Log uncorrectable error to console: 0=off 1=on");
module_param(edac_mc_log_ce, int, 0644);
MODULE_PARM_DESC(edac_mc_log_ce,
		 "Log correctable error to console: 0=off 1=on");
module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_int,
		  &edac_mc_poll_msec, 0644);
MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");


static struct device *mci_pdev;

/*
 * various constants for Memory Controllers
 */

static const char * const mem_types[] = {
	[MEM_EMPTY] = "Empty",
	[MEM_RESERVED] = "Reserved",
	[MEM_UNKNOWN] = "Unknown",
	[MEM_FPM] = "FPM",
	[MEM_EDO] = "EDO",
	[MEM_BEDO] = "BEDO",
	[MEM_SDR] = "Unbuffered-SDR",
	[MEM_RDR] = "Registered-SDR",
	[MEM_DDR] = "Unbuffered-DDR",
	[MEM_RDDR] = "Registered-DDR",
	[MEM_RMBS] = "RMBS",
	[MEM_DDR2] = "Unbuffered-DDR2",
	[MEM_FB_DDR2] = "FullyBuffered-DDR2",
	[MEM_RDDR2] = "Registered-DDR2",
	[MEM_XDR] = "XDR",
	[MEM_DDR3] = "Unbuffered-DDR3",
	[MEM_RDDR3] = "Registered-DDR3",
	[MEM_DDR4] = "Unbuffered-DDR4",
	[MEM_RDDR4] = "Registered-DDR4"
};


static const char * const dev_types[] = {
	[DEV_UNKNOWN] = "Unknown",
	[DEV_X1] = "x1",
	[DEV_X2] = "x2",
	[DEV_X4] = "x4",
	[DEV_X8] = "x8",
	[DEV_X16] = "x16",
	[DEV_X32] = "x32",
	[DEV_X64] = "x64"
};


static const char * const edac_caps[] = {
	[EDAC_UNKNOWN] = "Unknown",
	[EDAC_NONE] = "None",
	[EDAC_RESERVED] = "Reserved",
	[EDAC_PARITY] = "PARITY",
	[EDAC_EC] = "EC",
	[EDAC_SECDED] = "SECDED",
	[EDAC_S2ECD2ED] = "S2ECD2ED",
	[EDAC_S4ECD4ED] = "S4ECD4ED",
	[EDAC_S8ECD8ED] = "S8ECD8ED",
	[EDAC_S16ECD16ED] = "S16ECD16ED"
};

#ifdef CONFIG_EDAC_LEGACY_SYSFS
/*
 * EDAC sysfs CSROW data structures and methods
 */


#define to_csrow(k) container_of(k, struct csrow_info, dev)

/*
 * We need it to avoid namespace conflicts between the legacy API
 * and the per-dimm/per-rank one
 */

#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
	static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)


struct dev_ch_attribute {
	
struct device_attribute attr;
	
int channel;
};


#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
	static struct dev_ch_attribute dev_attr_legacy_##_name = \
                { __ATTR(_name, _mode, _show, _store), (_var) }


#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)

/* Set of more default csrow<id> attribute show/store functions */


static ssize_t csrow_ue_count_show(struct device *dev,
				   struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);

	return sprintf(data, "%u\n", csrow->ue_count);
}

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40.48%
1
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42
100.00%
3
100.00%



static ssize_t csrow_ce_count_show(struct device *dev,
				   struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);

	return sprintf(data, "%u\n", csrow->ce_count);
}

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1
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42
100.00%
3
100.00%



static ssize_t csrow_size_show(struct device *dev,
			       struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);
	int i;
	u32 nr_pages = 0;

	for (i = 0; i < csrow->nr_channels; i++)
		nr_pages += csrow->channels[i]->dimm->nr_pages;
	return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
}

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79
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static ssize_t csrow_mem_type_show(struct device *dev,
				   struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);

	return sprintf(data, "%s\n", mem_types[csrow->channels[0]->dimm->mtype]);
}

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24
46.15%
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52
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static ssize_t csrow_dev_type_show(struct device *dev,
				   struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);

	return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
}

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60.00%
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52
100.00%
5
100.00%



static ssize_t csrow_edac_mode_show(struct device *dev,
				    struct device_attribute *mattr,
				    char *data)
{
	struct csrow_info *csrow = to_csrow(dev);

	return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
}

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60.00%
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52
100.00%
5
100.00%

/* show/store functions for DIMM Label attributes */


static ssize_t channel_dimm_label_show(struct device *dev,
				       struct device_attribute *mattr,
				       char *data)
{
	struct csrow_info *csrow = to_csrow(dev);
	unsigned chan = to_channel(mattr);
	struct rank_info *rank = csrow->channels[chan];

	/* if field has not been initialized, there is nothing to send */
	if (!rank->dimm->label[0])
		return 0;

	return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
			rank->dimm->label);
}

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24
26.37%
2
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Arthur Jones
14
15.38%
1
16.67%
Toshi Kani
10
10.99%
1
16.67%
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91
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6
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static ssize_t channel_dimm_label_store(struct device *dev,
					struct device_attribute *mattr,
					const char *data, size_t count)
{
	struct csrow_info *csrow = to_csrow(dev);
	unsigned chan = to_channel(mattr);
	struct rank_info *rank = csrow->channels[chan];
	size_t copy_count = count;

	if (count == 0)
		return -EINVAL;

	if (data[count - 1] == '\0' || data[count - 1] == '\n')
		copy_count -= 1;

	if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
		return -EINVAL;

	strncpy(rank->dimm->label, data, copy_count);
	rank->dimm->label[copy_count] = '\0';

	return count;
}

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31.21%
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Doug Thompson
40
28.37%
2
33.33%
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141
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6
100.00%

/* show function for dynamic chX_ce_count attribute */


static ssize_t channel_ce_count_show(struct device *dev,
				     struct device_attribute *mattr, char *data)
{
	struct csrow_info *csrow = to_csrow(dev);
	unsigned chan = to_channel(mattr);
	struct rank_info *rank = csrow->channels[chan];

	return sprintf(data, "%u\n", rank->ce_count);
}

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62
100.00%
4
100.00%

/* cwrow<id>/attribute files */
DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);

/* default attributes of the CSROW<id> object */

static struct attribute *csrow_attrs[] = {
	&dev_attr_legacy_dev_type.attr,
	&dev_attr_legacy_mem_type.attr,
	&dev_attr_legacy_edac_mode.attr,
	&dev_attr_legacy_size_mb.attr,
	&dev_attr_legacy_ue_count.attr,
	&dev_attr_legacy_ce_count.attr,
	NULL,
};


static struct attribute_group csrow_attr_grp = {
	.attrs	= csrow_attrs,
};


static const struct attribute_group *csrow_attr_groups[] = {
	&csrow_attr_grp,
	NULL
};



static void csrow_attr_release(struct device *dev)
{
	struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);

	edac_dbg(1, "Releasing csrow device %s\n", dev_name(dev));
	kfree(csrow);
}

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3
100.00%


static struct device_type csrow_attr_type = {
	.groups		= csrow_attr_groups,
	.release	= csrow_attr_release,
};

/*
 * possible dynamic channel DIMM Label attribute files
 *
 */
DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 0);
DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 1);
DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 2);
DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 3);
DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 4);
DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 5);
DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 6);
DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
	channel_dimm_label_show, channel_dimm_label_store, 7);

/* Total possible dynamic DIMM Label attribute file table */

static struct attribute *dynamic_csrow_dimm_attr[] = {
	&dev_attr_legacy_ch0_dimm_label.attr.attr,
	&dev_attr_legacy_ch1_dimm_label.attr.attr,
	&dev_attr_legacy_ch2_dimm_label.attr.attr,
	&dev_attr_legacy_ch3_dimm_label.attr.attr,
	&dev_attr_legacy_ch4_dimm_label.attr.attr,
	&dev_attr_legacy_ch5_dimm_label.attr.attr,
	&dev_attr_legacy_ch6_dimm_label.attr.attr,
	&dev_attr_legacy_ch7_dimm_label.attr.attr,
	NULL
};

/* possible dynamic channel ce_count attribute files */
DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 0);
DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 1);
DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 2);
DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 3);
DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 4);
DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 5);
DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 6);
DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
		   channel_ce_count_show, NULL, 7);

/* Total possible dynamic ce_count attribute file table */

static struct attribute *dynamic_csrow_ce_count_attr[] = {
	&dev_attr_legacy_ch0_ce_count.attr.attr,
	&dev_attr_legacy_ch1_ce_count.attr.attr,
	&dev_attr_legacy_ch2_ce_count.attr.attr,
	&dev_attr_legacy_ch3_ce_count.attr.attr,
	&dev_attr_legacy_ch4_ce_count.attr.attr,
	&dev_attr_legacy_ch5_ce_count.attr.attr,
	&dev_attr_legacy_ch6_ce_count.attr.attr,
	&dev_attr_legacy_ch7_ce_count.attr.attr,
	NULL
};



static umode_t csrow_dev_is_visible(struct kobject *kobj,
				    struct attribute *attr, int idx)
{
	struct device *dev = kobj_to_dev(kobj);
	struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);

	if (idx >= csrow->nr_channels)
		return 0;

	if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
		WARN_ONCE(1, "idx: %d\n", idx);
		return 0;
	}

	/* Only expose populated DIMMs */
	if (!csrow->channels[idx]->dimm->nr_pages)
		return 0;

	return attr->mode;
}


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static const struct attribute_group csrow_dev_dimm_group = {
	.attrs = dynamic_csrow_dimm_attr,
	.is_visible = csrow_dev_is_visible,
};


static const struct attribute_group csrow_dev_ce_count_group = {
	.attrs = dynamic_csrow_ce_count_attr,
	.is_visible = csrow_dev_is_visible,
};


static const struct attribute_group *csrow_dev_groups[] = {
	&csrow_dev_dimm_group,
	&csrow_dev_ce_count_group,
	NULL
};



static inline int nr_pages_per_csrow(struct csrow_info *csrow)
{
	int chan, nr_pages = 0;

	for (chan = 0; chan < csrow->nr_channels; chan++)
		nr_pages += csrow->channels[chan]->dimm->nr_pages;

	return nr_pages;
}

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/* Create a CSROW object under specifed edac_mc_device */


static int edac_create_csrow_object(struct mem_ctl_info *mci,
				    struct csrow_info *csrow, int index)
{
	csrow->dev.type = &csrow_attr_type;
	csrow->dev.bus = mci->bus;
	csrow->dev.groups = csrow_dev_groups;
	device_initialize(&csrow->dev);
	csrow->dev.parent = &mci->dev;
	csrow->mci = mci;
	dev_set_name(&csrow->dev, "csrow%d", index);
	dev_set_drvdata(&csrow->dev, csrow);

	edac_dbg(0, "creating (virtual) csrow node %s\n",
		 dev_name(&csrow->dev));

	return device_add(&csrow->dev);
}

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15
12.82%
2
28.57%
Takashi Iwai
9
7.69%
1
14.29%
Borislav Petkov
6
5.13%
1
14.29%
Joe Perches
3
2.56%
1
14.29%
Total
117
100.00%
7
100.00%

/* Create a CSROW object under specifed edac_mc_device */


static int edac_create_csrow_objects(struct mem_ctl_info *mci)
{
	int err, i;
	struct csrow_info *csrow;

	for (i = 0; i < mci->nr_csrows; i++) {
		csrow = mci->csrows[i];
		if (!nr_pages_per_csrow(csrow))
			continue;
		err = edac_create_csrow_object(mci, mci->csrows[i], i);
		if (err < 0) {
			edac_dbg(1,
				 "failure: create csrow objects for csrow %d\n",
				 i);
			goto error;
		}
	}
	return 0;

error:
	for (--i; i >= 0; i--) {
		csrow = mci->csrows[i];
		if (!nr_pages_per_csrow(csrow))
			continue;
		put_device(&mci->csrows[i]->dev);
	}

	return err;
}

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32
22.07%
2
25.00%
Takashi Iwai
10
6.90%
1
12.50%
Greg Kroah-Hartman
5
3.45%
1
12.50%
Total
145
100.00%
8
100.00%



static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
{
	int i;
	struct csrow_info *csrow;

	for (i = mci->nr_csrows - 1; i >= 0; i--) {
		csrow = mci->csrows[i];
		if (!nr_pages_per_csrow(csrow))
			continue;
		device_unregister(&mci->csrows[i]->dev);
	}
}
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2
33.33%
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1
1.45%
1
16.67%
Total
69
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6
100.00%

#endif

/*
 * Per-dimm (or per-rank) devices
 */


#define to_dimm(k) container_of(k, struct dimm_info, dev)

/* show/store functions for DIMM Label attributes */


static ssize_t dimmdev_location_show(struct device *dev,
				     struct device_attribute *mattr, char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	return edac_dimm_info_location(dimm, data, PAGE_SIZE);
}

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5
100.00%



static ssize_t dimmdev_label_show(struct device *dev,
				  struct device_attribute *mattr, char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	/* if field has not been initialized, there is nothing to send */
	if (!dimm->label[0])
		return 0;

	return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
33
50.77%
2
33.33%
Doug Thompson
17
26.15%
2
33.33%
Toshi Kani
8
12.31%
1
16.67%
Borislav Petkov
7
10.77%
1
16.67%
Total
65
100.00%
6
100.00%



static ssize_t dimmdev_label_store(struct device *dev,
				   struct device_attribute *mattr,
				   const char *data,
				   size_t count)
{
	struct dimm_info *dimm = to_dimm(dev);
	size_t copy_count = count;

	if (count == 0)
		return -EINVAL;

	if (data[count - 1] == '\0' || data[count - 1] == '\n')
		copy_count -= 1;

	if (copy_count == 0 || copy_count >= sizeof(dimm->label))
		return -EINVAL;

	strncpy(dimm->label, data, copy_count);
	dimm->label[copy_count] = '\0';

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
60
52.17%
1
33.33%
Toshi Kani
55
47.83%
2
66.67%
Total
115
100.00%
3
100.00%



static ssize_t dimmdev_size_show(struct device *dev,
				 struct device_attribute *mattr, char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



static ssize_t dimmdev_mem_type_show(struct device *dev,
				     struct device_attribute *mattr, char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	return sprintf(data, "%s\n", mem_types[dimm->mtype]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



static ssize_t dimmdev_dev_type_show(struct device *dev,
				     struct device_attribute *mattr, char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	return sprintf(data, "%s\n", dev_types[dimm->dtype]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



static ssize_t dimmdev_edac_mode_show(struct device *dev,
				      struct device_attribute *mattr,
				      char *data)
{
	struct dimm_info *dimm = to_dimm(dev);

	return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mauro Carvalho Chehab
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



static ssize_t dimmdev_ce_count_show(struct device *dev,
				      struct device_attribute *mattr,
				      char *data)
{
	struct dimm_info *dimm = to_dimm(dev);
	u32 count;
	int off;

	off = EDAC_DIMM_OFF(dimm->mci->layers,
			    dimm->mci->n_layers,
			    dimm->location[0],
			    dimm->location[1],
			    dimm->location[2]);
	count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
	return sprintf(data, "%u\n", count);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Aaron Miller
104
100.00%
1
100.00%
Total
104
100.00%
1
100.00%



static ssize_t dimmdev_ue_count_show(struct device *dev,
				      struct device_attribute *mattr,
				      char *data)
{
	struct dimm_info *dimm = to_dimm(dev);
	u32 count;
	int off;

	off = EDAC_DIMM_OFF(dimm->mci->layers,
			    dimm->mci->n_layers,
			    dimm->location[0],
			    dimm->location[1],
			    dimm->location[2]);
	count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
	return sprintf(data, "%u\n", count);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Aaron Miller
104
100.00%
1
100.00%
Total
104
100.00%
1
100.00%

/* dimm/rank attribute files */
static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
		   dimmdev_label_show, dimmdev_label_store);
static DEVICE_ATTR(dimm_location, S_IRUGO